JP2015174056A - Carbon dioxide gas dissolution device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carbon dioxide gas dissolution device capable of extremely efficiently dissolving various carbon dioxide gases, without using a complicated gas-liquid mixing mechanism.SOLUTION: A carbon dioxide gas dissolution device comprises a water treatment member 1 having a member body 6 for forming a water flow passage in a penetration form and forming an orifice part 2c smaller in the flow cross-sectional area than an inflow port in a midway position of the flow passage and a collision part of projecting from an inner peripheral surface of the flow passage in the form of partitioning an axial cross section of the flow passage into two or more of segment areas 2e by the orifice part 2c, having a plurality of turns of orifice ribs in the circumferential direction on an outer peripheral surface and further reducing the flow passage cross-sectional area of the orifice part 2c and a carbon dioxide gas supply part 12 for making carbon dioxide gas flow in from a carbon dioxide gas supply source positioned in an external part of the member body in the water flow passage of the member body 6. A flow of water supplied to the inflow end of the member body 6 of the water treatment member 1, is passed by increasing a speed while distributing to the respective segment areas 2e after colliding with the collision part 3, and carbon dioxide gas is dissolved by mixedly crushing by rolling in a turbulent flow area formed just downstream of the collision part.

Description

  The present invention relates to a carbon dioxide gas dissolving apparatus.

  In recent years, the warm bath effect of carbon dioxide gas has attracted attention, and various products have been proposed. It is known that effects such as blood circulation promotion effects and heat retention effects appear in the human body when bathing in carbonated springs. That is, carbon dioxide enters the body via the skin respiratory system and fatty glands (hereinafter referred to as transdermal absorption), activates tissues, dilates blood vessels, lowers blood viscosity, etc. This is to lower the blood pressure and increase the supply of oxygen. It is said that the percutaneous absorption of carbon dioxide gas is more efficient when the skin surface is moist, for the following reason. Carbon dioxide is fat-soluble and water-soluble. The route of percutaneous absorption is that it dissolves in sebum due to the characteristics of the former, reaches the capillaries through the sebaceous glands from the pores, and is absorbed by the latter characteristics. In some cases, the entire skin becomes the entrance of absorption in a dissolved form. In the latter route, in the normal state, the penetration of moisture into the body is blocked by the action of a region called a barrier zone that exists in the epidermis, but when the stratum corneum on the skin surface absorbs moisture and swells, Since a part of the barrier zone is opened, water-soluble components reach the dermis from the epidermis, reach the capillaries, and are absorbed. Since the path from the former pore to the sebaceous gland is a limited ratio in the whole skin, it is natural that the latter is more efficient because the latter epidermis can be an absorption path. Therefore, in the whole body bathing with carbonated spring, means for swelling the stratum corneum of the epidermis also works effectively, so that percutaneous absorption of carbon dioxide gas is effectively performed. Since carbonated springs are also accompanied by an increase in blood flow due to thermal stimulation, an effect of efficiently circulating carbon dioxide absorbed in capillaries can be expected. Patent Documents 1 and 2 disclose a method of obtaining a thermal effect without unnecessarily increasing even in the cold season by dissolving carbon dioxide in shower water and using it for bathing to promote blood circulation on the body surface. .

JP-A-2-252423 JP 2002-272805 A

  In the shower apparatus of the said patent document 1, 2, there exists a difficulty in melt | dissolution efficiency of a carbon dioxide gas. In addition, there are scattered devices that increase the carbon dioxide dissolution efficiency by reversing the carbon dioxide separation membrane, but the gas dissolution unit using the carbon dioxide separation membrane is very expensive. On the other hand, Patent Document 2 discloses a configuration in which a carbon dioxide gas generating agent (solid foaming agent) is incorporated in a shower head, but the carbon dioxide gas bubbles are discharged from the water spray plate of the shower head as they are. However, there is a difficulty in sustaining the effect.

  An object of the present invention is to provide a carbon dioxide gas dissolving apparatus that can dissolve carbon dioxide gas extremely efficiently without using a complicated gas-liquid mixing mechanism.

In order to solve the above problems, the carbon dioxide gas dissolving apparatus of the present invention is:
An inflow end that is the water inflow side and an outflow end that is the water outflow side are defined, and a water flow path that connects the inflow opening that opens to the inflow end and the outflow opening that opens to the outflow end is formed in a through-hole configuration. A member main body in which a throttle part having a smaller flow cross-sectional area than the inlet is formed at an intermediate position of the path, and an inner peripheral surface of the flow path in a form in which the axial cross section of the flow path is divided into two or more segment regions at the throttle part A water treatment member that has a collision portion that protrudes from the outer circumferential surface and has a plurality of circumferentially-oriented throttle ribs and further reduces the flow passage cross-sectional area of the throttle portion;
A carbon dioxide gas supply section for introducing carbon dioxide gas from a carbon dioxide gas supply source located outside the member main body into the water flow path of the member main body,
After the water flow supplied to the inflow end of the hydraulic member main body collides with the collision portion, the water flow is increased while being distributed to each segment area, and the disturbance formed immediately downstream of the collision portion. It is characterized in that carbon dioxide gas is entrained in the basin and mixed and ground to dissolve.

  In the member main body, the water flow generates a violent turbulent flow when it collides with the collision portion and detours to the segment area. In addition, a plurality of throttle ribs are formed on the outer peripheral surface of the collision part, and water flows in a direction tangential to the outer peripheral surface so as to bypass the collision part. Therefore, in the groove (or valley) between the throttle ribs By being throttled, the speed is further increased, and the effect of generating turbulence is enhanced. By this turbulent flow, the effect of shearing / pulverizing carbon dioxide flowing together with water is improved, and a remarkable carbon dioxide dissolution effect is achieved.

  Further, the carbon dioxide gas once dissolved in this way is instantaneously accelerated and distributed to the segment region. In particular, the local and instantaneous speed-up effect is further enhanced in the groove (or valley) between the diaphragm ribs. In the region where the flow rate is increased in this manner, a negative pressure region is formed according to Bernoulli's principle, and dissolved carbon dioxide gas (or gas components such as air originally dissolved in water) precipitates and becomes fine. Bubbles are generated. This deposition of carbon dioxide proceeds violently in a boiling phenomenon, and further enhances the water stirring effect and turbulent flow generation effect.

  The fact that once dissolved carbon dioxide is boiled and precipitated by decompression reduces the amount of dissolved carbon dioxide in the water, but the time for water to pass through the decompression zone is extremely instantaneous, and carbon dioxide introduced from the outside. The agitation and forced dissolution effect on the water proceeds in a way that exceeds that. As a result, although seemingly contradictory, the effect of promoting the pulverization / dissolution of carbon dioxide is further enhanced by the stirring effect of the boiling of the dissolved carbon dioxide.

  Bubbles generated by boiling precipitation grow while gradually increasing the bubble diameter while water stays in the reduced pressure region due to the inflow of the surrounding dissolved carbon dioxide component from the extremely fine bubble generation nuclei. However, as described above, the period during which water stays in the reduced pressure region is extremely instantaneous, and when the pressure is removed from the reduced pressure region, the growth stops quickly. Accordingly, the generated bubbles are extremely small and are generated as so-called fine bubbles (1 μm or more and 500 μm or less) or ultrafine bubbles (30 nm to less than 1 μm) (hereinafter collectively referred to as microbubbles). As a result, not only can the amount of carbon dioxide dissolved be increased, but the carbon dioxide remaining without being dissolved also remains in the liquid as microbubbles with a very low ascent rate, and this is known in various ways unique to microbubbles. There is also an advantage that effects (for example, cleaning effect, water permeability promoting effect, etc.) are exhibited.

  And in this invention, the collision part which further reduces the flow-path cross-sectional area of the said aperture | diaphragm | squeeze part is arrange | positioned in the form which partitions the axial cross section of a flow path into a some segment area | region in an aperture | diaphragm | squeeze part. In other words, instead of reducing the cross-sectional area of the flow path in the radial direction toward the cross-sectional center where the flow velocity is high, the area where water can flow is said to be in the circumferential direction by using the collision part as an obstacle. This is because the cross section of the flow path is reduced by thinning out. As a result, the fluid resistance at the throttle portion does not increase excessively, and the effect of increasing the flow velocity and thus the effect of generating negative pressure can be greatly increased. Thereby, the depressurization effect in each segment region (and downstream thereof) is greatly enhanced. For example, even if the dissolved carbon dioxide gas concentration is the same, finer and more bubbles can be deposited. In addition, since the flow rate is not excessively reduced, the carbon dioxide dissolution effect by stirring and shearing can be maintained well. Such an effect is more remarkable when the collision part is formed in a form in which the axial cross section of the flow path is divided into three or more segment regions at the throttle part.

  Next, the fluid that flows into the segment region mainly flows around the tip of the collision portion, and the flow near the center of the cross section where the flow velocity becomes the highest tends to be decelerated due to the detour. Therefore, it is effective to form a high-speed flow gap for passing the central flow of the cross section, which is relatively high speed with respect to the flow around the cross section, between the tip portions of two or more of the plurality of collision portions. is there. Thereby, the flow near the center of the cross section can be passed through the high-speed flow gap without greatly decelerating. As a result, the flow rate of water is greatly increased in the high-speed flow gap, and the dissolution effect of carbon dioxide gas by stirring and shearing can be promoted. In addition, since the detour flow around the collision part causes a violent turbulent region in the region immediately downstream of the high-speed flow gap due to the presence of the narrowed rib portion around the collision unit, bubble growth is suppressed when passing through the turbulent region, so Even when gas bubbles remain, further miniaturization can be achieved.

  The high velocity flow gap can be formed in various forms. For example, at least one pair of a plurality of collision portions is arranged in a shape facing the inner diameter direction across the center of the section of the throttle portion, and a central gap constituting a high-speed flow gap is formed between the tips of the collision portions You can also According to this configuration, the flow at the center of the cross section having the highest flow velocity can be passed through the center gap without causing a large loss. The flow at the center of the cross section is further narrowed by the passage of the central gap to increase the speed, but since the flow detour to the segment region side is permitted, an increase in fluid resistance is effectively suppressed. As a result, the depressurization effect is greatly enhanced, and the flow velocity at the center of the cross section can be greatly increased, so that the dissolution effect of carbon dioxide gas by stirring and shearing can be promoted. Further, even when carbon dioxide bubbles remain, further refinement thereof can be achieved.

  When the segment region is formed in three or more, a cone-shaped portion that reduces the axial cross section toward the tip is formed at the tip of the collision portion, and the cone-shaped portion of the two collision portions adjacent to each other across the segment region is formed. A slit portion constituting a high-speed flow gap can be formed between the outer peripheral surfaces. Since the slit portion is formed in the direction of the outer peripheral surface bus of the cone-shaped portion, the flow toward the slit portion is constricted so as to overcome the bulge along the bus-line of the cone-shaped portion, and is compressed together with the introduced carbon dioxide gas. As a result, the effect of dissolving carbon dioxide gas is enhanced, and for example, it is possible to promote the dissolution of carbon dioxide gas exceeding the saturation concentration under atmospheric pressure.

  Moreover, since the flow allowance of the water compressed in the longitudinal direction of the slit part is given, the flow rate is hardly lowered, which also increases the pressure reduction effect. In the conventional venturi tube or orifice, the decompression area was formed in the shape of a point in the vicinity of the center of the throttle, but in the above configuration, the decompression area is formed linearly along the slit portion, so that the decompression area is greatly expanded. Further, the effect of promoting the dissolution of carbon dioxide gas is further enhanced. Further, even when carbon dioxide bubbles remain, further miniaturization thereof can be achieved.

  The collision parts can be provided in a cross shape in which the protruding directions are orthogonal to each other in the axial section of the diaphragm part, and the diaphragm part can be divided into four diaphragm segment regions by these collision parts. By disposing the collision portions in directions orthogonal to each other and dividing the four throttle segment regions, the object of arrangement of the collision portions and the throttle segment regions with respect to the center of the cross section is improved, and the effect of promoting the dissolution of carbon dioxide gas is enhanced. Further, even when carbon dioxide gas bubbles remain, fine bubbles can be deposited more uniformly.

  Also in this case, in order to pass the cross-sectional center flow that is relatively high speed with respect to the cross-sectional peripheral flow, between the tip portions of two or more of the plurality of collision portions that protrude toward the central portion of the cross-section of the throttle portion. The high-speed flow gap can be formed. The four collision portions can be provided so as to protrude from the inner peripheral surface of the flow channel toward the central portion of the flow channel. In addition, by forming a cone-shaped portion that reduces the axial cross section toward the tip of each collision portion, a high-speed flow is generated between the outer peripheral surfaces of the cone-shaped portions in the collision portions adjacent to each other across the segment region. The slit part which comprises a gap can be formed. As a result, a central gap that constitutes a part of the high-speed flow gap is formed between the tips of the collision portions that are arranged opposite to each other in the inner diameter direction across the center of the cross section of the throttle portion. The part is formed in a cross shape integrated through a central gap.

  According to said structure, the flow of the cross-sectional center used as the highest flow velocity is effectively restrict | squeezed by the four cone-shaped parts arrange | positioned so that a cross-sectional center may be surrounded, and it will flow in while increasing at a center gap. And the surrounding four slit portions communicate with the center gap, and the flow that is squeezed and compressed in the center gap is extremely effectively suppressed from increasing the fluid resistance by detouring to the slit portion, and Since it is squeezed by a slit, a decrease in flow velocity at the detour destination can be suppressed to a low level. As a result, not only the central gap but also the slit portion has a very reduced pressure effect, and the carbon dioxide dissolution effect by stirring and shearing can be promoted. Further, even when bubbles remain, it becomes possible to further reduce the size, and this is particularly effective for the generation of ultrafine bubbles.

  In this case, by sharply forming the tip of the collision part facing the center gap, the flow passing through the vicinity can be accelerated particularly locally, and turbulent flow that is convenient for carbon dioxide dissolution in the region immediately below the center gap. Generation can be further promoted.

  Next, in order to enhance the flow throttling effect and thus the water agitation effect in the trough-shaped portion, the trough-shaped portion of the throttling rib formed on the outer peripheral surface of the collision portion should have a shape that decreases in width toward the bottom of the trough. desirable. In this case, it is preferable that the plurality of throttle ribs in the valley portion are formed adjacent to each other with the apex portion having an acute angle. Further, the apex angle of the aperture rib is preferably set to 60 ° or less and 20 ° or more from the viewpoint of optimizing the above effect.

  Further, the plurality of winding ribs can be integrally formed in a spiral shape. In this way, formation of the throttle rib is facilitated, and the throttle rib is inclined with respect to the flow, so that the flow component crossing the ridge line portion of the throttle rib increases, and the turbulent flow generation effect accompanying flow separation becomes remarkable. Therefore, the bubbles can be further miniaturized. In this case, if the collision part is formed with a screw member whose leg end side protrudes into the flow path, the thread formed on the outer peripheral surface of the leg part of the screw member can be used as a throttle rib, and manufactured. Is easy.

  Next, the carbon dioxide supply part is formed in the wall part of the member main body on the upstream side of the collision part, and one end is opened as a gas outlet on the inner peripheral surface of the water passage, and the other end is formed on the outer surface of the member main body. It can comprise as a gas supply path opened as a carbon dioxide gas supply port. By providing the gas supply passage in the member body, the water treatment member serves as the carbon dioxide supply part, and the number of parts can be reduced. In this case, by opening the gas outlet of the gas supply passage to the throttle portion, carbon dioxide gas can be sucked and injected by the pressure reducing effect in the throttle portion, and the gas mixing efficiency can be improved. The gas outlet may be opened at the tip of the collision part. However, when the required dissolved concentration of carbon dioxide gas is large, the gas outlet is located upstream of the collision part at the throttle part and at a position different from the collision part. Opening the outlet is advantageous because the cross-sectional dimensions of the water passage and the gas outlet can be set without receiving a contraction of the size of the collision portion.

  On the other hand, the carbon dioxide supply part can be configured as a gas injection nozzle provided on a water inflow pipe connected to the inlet of the member body. Thereby, the injection amount of the carbon dioxide gas can be set more freely without receiving a contract of the size or shape of the water treatment member. Further, as will be described later, when a plurality of water treatment members are distributed and arranged in parallel, if a gas injection nozzle is provided upstream from the distribution branch point, carbon dioxide gas is uniformly distributed to each water treatment member. Can do.

  Next, the water treatment member can be configured to include an upstream first water treatment member and a downstream and second water treatment member arranged in series in the water flow direction. In this case, the carbon dioxide supply unit supplies carbon dioxide to the first water treatment member, and the second water treatment member further pulverizes and dissolves the undissolved carbon dioxide by the first water treatment member. Can be. By dissolving and pulverizing the carbon dioxide gas stepwise by the plurality of water treatment members connected in series in this way, the dissolution efficiency of the carbon dioxide gas can be greatly increased. This is a particularly effective method when it is desired to increase the amount of dissolved gas or to decrease the proportion of undissolved carbon dioxide. Of course, the number of water treatment members arranged in series can be three or more. At this time, it is also possible to distribute and supply carbon dioxide gas to each of two or more of the plurality of water treatment members through separate paths. Moreover, the water distribution pipe can be branched into a plurality of parts in the middle, and a plurality of water treatment members can be provided in parallel on the branched distribution pipes. The carbon dioxide supply unit can be configured to supply carbon dioxide to at least one of the water treatment members connected in parallel. By using a plurality of water treatment members in parallel, a necessary amount of carbon dioxide can be efficiently dissolved even when the flow rate of water to be treated is large.

  When the dynamic water pressure of the water flow supplied to the water treatment member is 0.06 MPa or more (the upper limit is not limited, but it is 0.5 MPa or less for convenience), the average flow velocity of the water flow in the throttle portion is 3.3 m / sec or more. (The upper limit is not limited, but it is desirable to adjust the water flow cross-sectional area of the throttle portion so that it is 10 m / second or less for convenience). And when the carbon dioxide gas flow rate in terms of atmospheric pressure to the water treatment member by the carbon dioxide gas supply unit is A and the water flow rate is B, so that the value of A / B is 0.2 or more and 1.3 or less, By adjusting the flow rate of the carbon dioxide gas, the dissolution efficiency of the carbon dioxide gas in water can be increased to 70% or more. In particular, even when a large amount of carbon dioxide gas having an A / B value exceeding 0.6 is circulated, by adopting the configuration of the water treatment member having a configuration unique to the present invention, this can be achieved very quickly and 70 It is possible to dissolve at a high efficiency of at least%. At this time, the dissolution concentration of carbon dioxide gas can be set to a high concentration of 200 ppm to 1500 ppm. When the hydrodynamic pressure of the water flow is less than 0.06 MPa and the average flow velocity of the water flow at the throttle portion is less than 3.3 m / sec, the dissolution efficiency of carbon dioxide in water is not limited even if the A / B value is within the above range. It becomes less than 70%, and the amount of carbon dioxide consumed in vain increases, which is uneconomical.

  In addition, a sodium hypochlorite aqueous solution can be used as water. Efficient dissolution of carbon dioxide keeps the pH value of the sodium hypochlorite aqueous solution weakly acidic, for example, around 4.3 to 6, greatly increasing the concentration of hypochlorous acid in a dissociated state effective for sterilization and disinfection. In addition, the fluctuation of the pH value can be reduced by the pH buffering action peculiar to carbonic acid. For example, the phenomenon of undershooting to a low pH value of 3 or less is less likely to occur than in the conventional pH adjustment method by adding hydrochloric acid, and generation of harmful free chlorine gas can be suppressed. From the viewpoint of enhancing the effect, it is desirable that the sodium hypochlorite aqueous solution is adjusted to have a hypochlorite ion concentration of 10 ppm to 1000 ppm, and the dissolved concentration of carbon dioxide gas is adjusted to 200 ppm to 1500 ppm. Is desirable. When the hypochlorite ion concentration is less than 10 ppm, the disinfection action is insufficient, and when it exceeds 1000 ppm, the cost of the sodium hypochlorite aqueous solution is increased. In addition, by adjusting the dissolution concentration of carbon dioxide gas to 200 ppm or more and 1500 ppm or less, the pH value of the sodium hypochlorite aqueous solution is stably maintained in a pH range of 4.3 to 6 where the disinfection effect is optimized. be able to.

The schematic diagram which shows the example of 1 structure of the carbon dioxide dissolving apparatus of this invention. Sectional drawing which shows the detail of the water treatment member of FIG. The figure which expands and shows the principal part of the water treatment member of FIG. A Action explanatory drawing of a collision part. B is an operation explanatory view of the diaphragm rib. The figure which shows the 1st modification of a collision part. The figure which shows the 2nd modification of a collision part. The figure which shows the 3rd modification of a collision part. The figure which shows the 4th modification of a collision part. The figure which shows the 5th modification of a collision part. The figure which shows the 6th modification of a collision part. The figure which shows the 7th modification of a collision part. The figure which shows the 8th modification of a collision part. The figure which shows the 9th modification of a collision part. The figure which shows the 10th modification of a collision part. The figure which shows the 11th modification of a collision part. The figure which shows the 12th modification of a collision part. The figure which shows the 13th modification of a collision part. The figure which shows the 14th modification of a collision part. The figure which shows the 15th modification of a collision part. The figure which shows the 16th modification of a collision part. Sectional drawing which shows the example which connects a plurality of water treatment apparatuses in series. Sectional drawing which shows the example which comprises a carbon dioxide gas supply part as a gas injection nozzle separate from a water treatment apparatus. Sectional drawing which shows the example which forms a gas supply path in a collision part. Sectional drawing which similarly shows another example. The schematic diagram which shows the 1st example which connects a some water treatment apparatus in parallel. The schematic diagram which similarly shows a 2nd example. The schematic diagram which similarly shows a 3rd example. The schematic diagram which similarly shows a 4th example. The schematic diagram which shows the example which provides a water treatment member on a circulation pipe line. The schematic diagram which shows the structural example of the carbon dioxide melt | dissolution apparatus in the case of using sodium hypochlorite aqueous solution.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram showing a configuration example of the carbon dioxide gas dissolving apparatus of the present invention. In the carbon dioxide gas dissolving device 100, a water flow path 18 made of a piping member is provided inside the main body case 100C, and both ends thereof open the water inlet 19 and the water outlet 20 with respect to the main body case 100C. A hot water supply pipe 51 (water pipe in this embodiment) is connected to the water inlet 19 so that hot water from the water heater 50 is supplied to the water flow path 18.

  A water treatment apparatus 1 is provided in the middle of the supply water flow path 18, and a gas supply pipe 12 is connected to the water treatment apparatus 1, and carbon dioxide gas is supplied to the water treatment apparatus 1 through this. In the present embodiment, the gas supply line 12 opens the gas supply port 14 on the main body case 100C, and the gas pipe 31 is connected thereto. In the present embodiment, a gas pipe 31 is connected to a cylinder 41 of carbon dioxide gas (for example, oxygen, nitrogen, air, chlorine, etc.), and the carbon dioxide gas from the cylinder 41 is reduced in pressure and pressure by a pressure reducing valve 42 and a flow rate adjusting valve 32. The flow rate is adjusted and guided to the gas supply line 12. The carbon dioxide gas is dissolved in the water in the water flow path 18 by the water treatment device 1 to become a carbon dioxide gas solution GW, which flows out and is supplied from the water outlet 20. The water outlet 20 is connected to a faucet fitting 54 of a wash basin 53 through a water supply hose 52. By the operation of the water-washing metal fitting 54, the carbon dioxide solution GW is sprayed from the shower head 56 via the shower hose 55, and can be used for hair washing or the like in the wash basin 53. In addition to carbon dioxide-specific hair penetration effect and blood circulation promotion effect (and thus relaxation effect), carbon dioxide fine bubble or ultra fine bubble effect that occurs at the same time, sebum, scalp dirt, corner to fill pores The removal effect of plug material is promoted. In addition, the effect of preventing rough hands of workers performing hair washing is also remarkable.

  In the carbon dioxide gas dissolving device 100, a flow detection sensor 22 is provided in the middle of the supply water flow path 18, and an electromagnetic valve 13 is provided in the middle of the gas supply pipe 12. Further, a power circuit 16 is provided in the main body case 100C, and the commercial AC input AC input through the power plug 22 and the power cord 21 is converted into a drive voltage and a signal voltage for the electromagnetic valve 13, and output. It is supposed to be. Further, a control circuit 17 is provided in the case 100C, and a changeover switch 15 (for example, a foot switch) and a flow detection sensor 22 are connected to the case 100C. In the control circuit 17, the flow detection sensor 22 does not detect the flow in the supply water flow path 18 (that is, when the faucet fitting 55 is closed) or the changeover switch 15 (the carbon dioxide supply) When any one of the OFF states is detected, the electromagnetic valve 13 is closed and the supply of the carbon dioxide gas to the water treatment apparatus 1 is automatically shut off. If the changeover switch 15 is turned off, carbon dioxide is not supplied, but if dissolved air is present in the supplied hot water, the dissolved air will precipitate as fine bubbles or ultra fine bubbles, and moisture to the hair. It is possible to enjoy the permeation effect, cleaning promotion effect, moisturizing effect and the like.

  FIG. 2 is an enlarged view showing the water treatment apparatus 1 taken out. The member body 6 is formed with a passage 2 connecting the inlet 2n opening at the inflow end and the outlet 2x opening at the outflow end in a penetrating form, and flows in the middle of the channel 2 from the inlet 2n. A narrowed portion 2c having a small cross-sectional area is formed. As shown in FIG. 3, the throttle section 2c further reduces the channel cross-sectional area of the throttle section 2c by dividing the axial section of the flow path 3 into three or more, in this embodiment, four segment regions 2e. The collision part 3 to be made is arranged. Each collision portion 3 is configured as a screw member, and as shown in FIG. 2, four are attached so as to be screwed into a screw hole 3h formed in a radial direction from the outer peripheral surface side of the member body 6 toward the throttle portion 2c. It has been. Each segment region 2e is formed such that the flow path cross-sectional areas are equal to each other.

  A gas supply passage 10h having one end opened on the inner peripheral surface and the other end opened on the outer peripheral surface is formed in the wall portion of the member main body 6 upstream of the collision portion 2c in the radial direction. 10 is inserted. The distal end of the gas injection pipe 10 is opened as a gas outlet, and the other end is opened as a carbon dioxide supply port on the outer surface of the member body 6. In this embodiment, the carbon dioxide gas supply port of the gas supply passage 10h is formed by a connector 11 fitted therein, and a gas supply line 12 is connected thereto.

  In FIG. 2, the flow of water supplied to the inflow end of the member main body 6 collides with the collision part 3 while entraining bubbles of carbon dioxide G supplied from the gas supply passage 10h, and is then distributed to each segment region 2e. While increasing the speed while passing, intense turbulence is generated when detouring to the segment area 2e. Further, as will be described later, a plurality of threads, that is, throttle ribs 5r (see FIG. 4A) are formed on the outer peripheral surface of the collision portion 3, and water flows in the tangential direction of the outer peripheral surface to bypass the collision portion 3. Therefore, the speed is further increased and the effect of generating turbulence is drastically enhanced by narrowing in the groove (or valley) 21 (see FIGS. 4A and 4B) between the narrowing ribs. By this turbulent flow, the shearing / pulverizing effect of the carbon dioxide gas G flowing together with water is improved, and the dissolution effect is enhanced. Further, the carbon dioxide gas once dissolved in this way is instantaneously increased and distributed to the segment region 2e. In particular, the local / instantaneous speed increasing effect is further enhanced in the groove 21 (or valley) between the narrowed ribs 5r. In such an accelerated region, a negative pressure region LPA (FIG. 4B) is formed in accordance with Bernoulli's principle, and dissolved carbon dioxide in water precipitates to generate fine bubbles. This deposition of carbon dioxide proceeds violently in a boiling phenomenon, and further enhances the water stirring effect and turbulent flow generation effect.

  As shown in FIG. 3, a cross-section that is relatively high-speed relative to the cross-section peripheral flow between two or more tip portions of the plurality of collision portions 3 that protrude toward the central portion of the cross-section of the throttle portion 2 c. High-speed flow gaps 2g and 2k for passing the central flow are formed. A conical portion 5t that reduces the axial cross section toward the distal end is formed at the distal end portion of the collision portion 3 (in this embodiment, it is conical, but other conical shapes such as a quadrangular pyramid and a hexagonal pyramid are formed. However, in the two collision portions 3 adjacent to each other across the segment region 2e, a slit portion 2g constituting a high-speed flow gap is formed between the outer peripheral surfaces of the conical portions 5t. On the other hand, a center gap 2k constituting a high-speed flow gap is formed between the tips of the four collision portions 3 facing each other in the inner diameter direction across the center of the section of the throttle portion 2c.

  As shown in FIG. 3, the collision portions 3 are provided in a cross shape in which the projecting directions are orthogonal to each other in the axial section of the restriction portion 2c. The collision portions 3 cause the restriction portions to be divided into four restriction segment regions 2e. It is divided. The four collision portions 3 protrude from the inner peripheral surface of the flow channel 2 toward the central portion of the flow channel 2. Further, in the collision part 3 adjacent to each other across the segment region 2e, four slit parts 2g are formed between the outer peripheral surfaces of the cone-shaped part 5t, and the collision part 3 arranged opposite to the inner diameter direction is formed. A central gap 2k is formed between the tips. As a result, the high-speed flow gap is formed in a cross shape in which the four slit portions 2g are integrated via the center gap 2k.

  Further, as shown in FIG. 3, a plurality of circumferential restriction ribs 5 r are formed on the outer peripheral surface of each collision portion 3 along the protruding direction of the collision portion 3. The valley portion has a shape in which the width is reduced toward the valley low. The plurality of diaphragm ribs 5r are formed adjacent to each other with the apex being an acute angle. The apex angle of the aperture rib 5r is set to 60 ° or less and 20 ° or more, for example. As described above, the collision portion 3 is a screw member, and the plurality of winding ribs 5r are integrally formed in a spiral shape.

  As shown in FIG. 2, the water treatment apparatus 1 does not reduce the cross-sectional area of the flow path 2 in the throttle portion 2c in a similar manner in the radial direction toward the cross-sectional center O where the flow velocity is high, By using it as an obstacle, the area through which water can flow is reduced in a thinned form in the circumferential direction with respect to the center of the cross section. The fluid resistance at the throttle portion 2c does not increase excessively, and the effect of increasing the flow velocity, and hence the negative pressure generating effect, can be greatly increased. Thereby, the decompression effect in each segment area | region 2e (and its downstream) is improved significantly, for example, even if the dissolved carbon dioxide gas density | concentration is the same, more fine and a lot of bubbles can be deposited. In addition, since the flow rate is not excessively reduced, the carbon dioxide dissolution effect by stirring and shearing can be maintained well. Between the inflow side taper portion 2a and the outflow side taper portion 2b, the throttle portion 2c is formed as a constant cross-section portion, and the collision portion 3 is disposed in the constant cross-section portion (2c). Thus, the flow increased in speed can be guided to the collision part 3 while being stabilized at the constant section (2c).

  In the throttle portion 2c, the flow in the vicinity of the center of the cross section where the flow velocity is maximized is distributed to each segment region 2e, bypassing the tip portion of the collision portion 3. As shown in FIG. 3, since the high-speed flow gaps 2g and 2k are formed between the front end portions of the collision portion 3, the high flow velocity near the center of the cross section passes through the high-speed flow gaps 2g and 2k without significantly decelerating. it can. As a result, in the high-speed flow gaps 2g and 2k, the flow rate of water is greatly increased, and the carbon dioxide dissolution effect by stirring and shearing can be promoted. In addition, the detour flow of the collision portion 3 causes a strong turbulent flow region in the immediately downstream regions 2g and 2k of the high-speed flow gap due to the presence of the restriction rib portion restriction rib 5r around the collision portion. Even when bubble growth is suppressed and bubbles remain, further miniaturization can be achieved.

  Of the high-speed flow gaps 2g and 2k, the slit portion 2g formed between the tip portions (cone portions) 5t and 5t of the collision portion 3 adjacent to each other across the segment region 2e is an outer peripheral surface bus of the conical portion 5t. Formed in the direction. Accordingly, the flow toward the slit portion 2g is squeezed and compressed so as to overcome the bulge along the generatrix of the cone-shaped portion 5t. As a result, the effect of dissolving carbon dioxide gas is enhanced, and for example, it is possible to promote the dissolution of carbon dioxide gas exceeding the saturation concentration under atmospheric pressure. At this time, since the flow rate of the compressed water is given in the longitudinal direction of the slit portion 2g, the flow rate is hardly lowered, and the cavitation (decompression) effect is further enhanced. Further, since the cavitation generation region is formed linearly along the slit portion 2g, the region where bubbles are deposited under reduced pressure is greatly expanded, and the effect of promoting the dissolution of carbon dioxide gas is further enhanced. Further, even when bubbles remain, further miniaturization can be achieved.

  On the other hand, the center gap 2k is formed so as to include the center of the cross section, and the center flow having the maximum flow velocity can pass through the center gap 2k without being influenced by detours. In addition, the center flow is further narrowed by the passage of the center gap 2k to increase the speed, but since the flow detour to the segment region 2e side is permitted, an increase in fluid resistance is effectively suppressed. As a result, the cavitation (decompression) effect at the center of the cross section can be further enhanced, and the carbon dioxide dissolution effect by stirring and shearing can be promoted. Further, even when bubbles remain, it becomes possible to further reduce the size, and this is particularly effective for the generation of ultrafine bubbles. Each flow distributed to the segment region 2e generates a vortex or a turbulent flow downstream of the individual impingement portions 3, so that the dissolution effect or the bubble crushing / miniaturization effect is enhanced.

  Then, as shown in FIG. 4A, the high-speed flow near the center of the cross-section is effectively constricted by the four conical portions 5t arranged so as to surround the cross-sectional center and flows into the center gap 2k while being accelerated. As shown in FIG. 3, four slit portions 2g around the center gap 2k communicate with each other, and the flow compressed and compressed in the center gap 2k bypasses the slit portion 2g, so that the fluid resistance is extremely increased. Effectively suppressed. Moreover, since the flow detouring to the slit portion 2g itself also has a degree of freedom in the slit longitudinal direction, a decrease in the flow velocity can be suppressed low. As a result, the cavitation (decompression) effect is extremely active even in the center gap 2k and the slit portion 2g, and the carbon dioxide dissolution effect by stirring and shearing can be promoted. Further, even when bubbles remain, it becomes possible to further reduce the size, and this is particularly effective for the generation of ultrafine bubbles. Further, the tip of the collision part 3 (conical part 5t) facing the center gap 2k is sharply formed, and the flow passing through the vicinity thereof can be made particularly fast, so that carbon dioxide is dissolved in the region immediately below the center gap 2k. It is possible to further promote the generation of turbulent flow that is advantageous to the above.

  Further, a plurality of circumferential narrowing ribs 5 r are formed on the outer peripheral surface of the collision part 3 along the protruding direction of the collision part 3. The dissolved gas flowing in the tangential direction of the outer peripheral surface of the collision part 3 is further increased in speed by being squeezed in the groove part (or valley-like part) 21 between the throttle ribs 5r, and the pressure reduction effect is enhanced. As shown in FIG. 4B, the flow on the valley opening side is relatively slow, and the pressure is particularly high with respect to the high-speed flow on the valley bottom side. That is, a low-speed high-pressure area HPA is formed on the valley opening side, and a high-speed low-pressure area LPA is formed on the valley low side, so that the gas saturation dissolution amount of water on the valley opening side increases and the saturation dissolution amount on the valley bottom side decreases. As a result, as shown in FIG. 6, the dissolved air (dissolved water) SGF in the water flow is changed from the low-speed flow region LF (high pressure region HPA: FIG. 4A) on the valley opening side to the high-speed flow region FF (low pressure region LPA: In FIG. 4B), the bubbles MB are deposited very actively.

  Further, as shown in FIG. 3, the collision portion 3 is formed by a screw member 5, and a plurality of winding ribs 5r are integrally formed in a spiral shape. In addition to being able to easily use the thread as the throttle rib 5r, when the throttle rib 5r is inclined with respect to the flow, the flow component crossing the ridge portion of the throttle rib 5r increases, and the effect of generating turbulent flow accompanying flow separation becomes significant. Therefore, the carbon dioxide dissolving effect and the advantage that the bubbles can be further refined are also produced.

  Hereinafter, various modifications of the present invention will be described. FIGS. 5 and 6 are modifications according to the form of the protrusion 3 in the water treatment apparatus, both of which form the collision part in the form of dividing the section of the throttle part 2c into two segment regions 2e and 2e. Yes. In the configuration of FIG. 5, a pair of collision parts 30 ′ and 30 ′ made of screw members are opposed to each other in the diameter direction of the throttle part 2 c, and a high-speed flow gap 2 k is formed between the tip surfaces 5 u and 5 u. On the other hand, in the configuration of FIG. 6, the high-speed flow gap is not formed, and the collision portion 30 that crosses the cross section of the throttle portion 2c in the diameter direction is formed by a screw member. Further, in the water treatment device 70 of FIG. 7, a plurality of throttle portions 2c are provided in the member body 6, and the collision portion 30 similar to FIG. 5 (of course, has a high-speed flow gap 2k as shown in FIG. This is an example in which each of the narrowed portions 2c is formed.

  Next, as shown in FIG. 3, in the configuration in which the throttle ribs 5r are continuously formed on the outer peripheral surfaces of all the collision parts 3, there is a concern that the bubble deposition becomes excessive when the flow velocity of the flow flowing into the throttle part 2c is large. Is done. Therefore, as shown in FIGS. 8, 9, and 10, it is also possible to form the squeezing rib 5r only on a part of the outer peripheral surface of the collision portion to suppress the bubble deposition frequency in the valley portion.

  FIG. 8 shows an example in which a part of the plurality of collision portions 3 is provided with the throttle rib 5r and the remainder is not provided with the throttle rib 5r. In this embodiment, the ones with the diaphragm ribs 5r and the ones without the diaphragm ribs 5r are alternately arranged in the circumferential direction. Further, when it is desired to suppress the excessive generation of bubbles by forming the throttle rib 5r in the remaining region without forming the throttle rib 5r at the tip of the collision part 3 located at the center of the cross section where the flow velocity is particularly high. Is valid. Also in FIG. 3, the diaphragm rib 5r was not formed on the outer peripheral surface of the conical portion 5t that forms the tip of the collision portion 3, but when the bubble generation is excessive, as shown in FIG. A configuration in which the formation of the diaphragm rib 5r is omitted in the tip side region of the cylindrical peripheral side surface portion following the conical portion 5t is also possible. Further, FIG. 10 shows an example in which the diaphragm rib 5r is intermittently formed in the axial direction on the cylindrical peripheral side surface portion. Further, as shown in FIG. 7, it is also possible to adopt a configuration in which no diaphragm rib is formed on the outer peripheral surface of the collision portion.

  Next, as shown in FIG. 11, it is possible to form a plurality of independent diaphragm ribs 5s in close contact with each other in the axial direction so as to be closed in the circumferential direction around the axis of the collision portion 3. In FIG. 11, independent individual restricting ribs 5 s are formed in a direction orthogonal to the axis of the collision portion 3, but it is also possible to form them by inclining with respect to a plane orthogonal to the axis. In this way, as in FIG. 3, the squeezing rib is inclined, so that the effect of generating turbulent flow accompanying flow separation becomes significant, the stirring effect effective for dissolving carbon dioxide gas is enhanced, and the bubbles are further refined. Can be achieved.

  In FIG. 3, the tip angle of the cone-shaped portion 5t that forms the tip of the collision portion 3 is 90 ° (that is, the entire circumferential angle is 360 °) expressed by a cross section cut by a plane including the axis of the collision portion 3. (Value divided by the number (4) of the collision parts 3). Therefore, as shown in FIG. 12, if each collision part 3 is positioned so that the side surfaces of the adjacent cone-shaped parts 5t are in close contact with each other so that the tip of the collision part 3 is aligned with the center of the cross section of the throttle part 2c, It is also possible to have no flow gap. Thereby, the flow of water is distributed to each segment region 2e without any problem, and bubbles can be generated by the cavitation effect mainly composed of the throttle rib 5r. Further, as shown in FIG. 13, the tip of the cone-shaped part 5t is brought into contact with the pair of collision parts 3 and 3 opposed in the inner diameter direction, and the remaining pair of collision parts 3 and 3 are retracted in the axial direction. By doing so, the slit portion 5t can be formed.

  The tip of the collision portion 3 can be formed flat. In the example shown in FIGS. 14 and 15, the flat tip surface 5u is formed by cutting out the tip portion of the conical portion 5t similar to FIG. Thereby, expansion of the center gap 2k and flow uniformity can be achieved. In FIG. 14, the side surfaces of the adjacent conical portions 5t are brought into close contact with each other, but the center gap 2k is formed in a closed shape by forming a flat front end surface 5u. FIG. 15 shows an example in which the slit portion 2g is formed between the side surfaces of the adjacent conical portions 5t.

  In the configuration of FIG. 16, the main collision portion 130 is disposed so as to cross the cross section of the throttle portion 2c along the inner diameter, and further, the cross section center of the throttle portion 2c is sandwiched between the main collision portion 130 and the main collision portion 130. This is an example in which a pair of opposed collision portions 30 opposed in the inner diameter direction are provided. An outer peripheral gap 2j constituting a high-speed flow gap is formed between each front end surface of the opposing collision unit 30 and the outer peripheral surface of the main collision unit 130. In the case where the inner diameter of the narrowed portion 2c must be reduced, the above configuration can be simplified as compared with the configuration in which the center gap 2k is formed. The flow in the vicinity of the center of the cross-section collides with the main collision portion 130 and detours, but passes through the outer peripheral gap 2j formed by the opposing collision portion 30 while being accelerated by the influence of centrifugal force detouring the main collision portion 130. Therefore, there is an advantage that the influence of the flow deceleration due to the collision with the main collision portion 130 is not so great.

  In the configuration of FIG. 16, the tip of the opposing collision part 30 is formed flat, and the outer peripheral gap 2j is formed in a slit shape. Since the cavitation region can be expanded in the slit longitudinal direction, fine bubbles can be generated at a higher concentration. The main collision part 130 is an integral member in the inner diameter direction in which both end parts are embedded in the member main body 6, and a throttle rib 5 r is formed on the entire outer peripheral surface of the part exposed in the throttle part 2 c. In the outer peripheral gap 2j, the outer peripheral surface of the main collision portion 130 facing the tip surface of the opposing collision portion 30 is uneven by the restriction rib 5r, and the gap interval is narrowed at the position of the restriction rib 5r (mountain) so that the high-speed flow region In the valley portion 21, the gap interval is increased and a low flow velocity region is generated. As a result, a flow of dissolved gas is generated from the low flow rate region to the high flow rate region due to the pressure difference between these two adjacent regions, and the dissolved gas is generated in the valley portion 21 shown in FIGS. 4A to 4B. By adding a gas flow, bubble deposition is extremely activated, and the stirring effect of water and the dissolution effect are improved. Further, the outer peripheral surface of the main collision part 130 is reduced in distance from the water inflow side to the position facing the front end surface of the opposite collision part 30, and the flow velocity increases due to the throttling effect. It is advantageous for enhancing the dissolution effect. Note that, as indicated by broken lines in FIG. 16, the space of the valley-shaped portion 21 forms the outer peripheral gap 2j even if the front end surface of the opposing collision portion 30 is brought into contact with the diaphragm rib 5 on the outer peripheral surface of the main collision portion 130. It can be shaped.

  FIG. 17 shows an example in which the front ends of the opposing collision portions 3 and 3 are sharply formed. In the outer circumferential gap 2j, the squeezing effect near the tip of the opposing collision portion 3 is enhanced, and the carbon dioxide dissolution effect can be improved by increasing the flow velocity. Each of the main collision parts has a flat front end surface 5u and a pair of collision parts 30 and 30 each having a chamfered portion 3t formed along the outer periphery of the front end surface 5u are in contact with each other at the front end surfaces 5u and 5u. In this manner, it is arranged so as to face the inner diameter direction of the throttle portion 2c. The front ends of the opposing collision portions 3 and 3 form an outer peripheral gap 2j so as to face a groove portion having a V-shaped cross section formed by the chamfered portion 3t of the two collision portions 30 and 30 forming the main collision portion. As a result, the effect of increasing the flow velocity in the vicinity of the tip of the opposed collision portion 3 is further enhanced.

  Further, as shown in FIGS. 18 and 19, the main collision portion is indicated by a pair of collision portions 30 ′, 30 ′ (hereinafter referred to as main collision portions 30 ′, 30 ′) each having flat tip surfaces 5u, 5u. It is also possible to form a central gap 2k that includes the center of the cross section of the throttle portion 2c between the tip surfaces 5u and 5u, and to be disposed opposite to the inner diameter direction of the throttle portion 2c. . FIG. 18 shows a configuration in which the distal end surfaces of the opposing collision portions 30 and 30 are brought into contact with the outer peripheral surfaces of the leading end portions of the main collision portions 30 ′ and 30 ′ (as a result, the diaphragm rib 5 r). By dividing into two collision portions 30 ′ and 30 ′ and forming the center gap 2k between the front end surfaces in this way, the flow in the vicinity of the center of the cross section where the flow velocity is maximized is restricted by the center gap 2k and further increased in speed. Turn into. FIG. 19 shows a slit-like outer peripheral gap 2j in which the front end surfaces 5u and 5u of the opposing collision portions 30 and 30 are separated from the outer peripheral surface of the front end portion of the main collision portions 30 ′ and 30 ′ (and consequently the diaphragm rib 5r). An example in which is further formed will be shown. The flow that is squeezed and compressed in the center gap 2k is diverted to the slit-shaped outer peripheral gap 2j, so that an increase in fluid resistance is extremely effectively suppressed. Further, since the outer peripheral gap 2j is also narrowed in a slit shape, a decrease in flow velocity at the detour destination can be suppressed to a low level.

  FIG. 20 is an example in which three segment regions 2 e are formed by three collision portions 3. Further, the number of segment regions formed can be 5 or more.

  FIG. 21 shows an example in which the water treatment member is configured to include an upstream first water treatment member 1 and a downstream and second water treatment member 1 ′ arranged in series in the water flow direction. It is. The first water treatment member 1 on the upstream side has a carbon dioxide supply part having the same configuration as that in FIG. 2, and the second water treatment member 1 ′ has a structure in which the carbon dioxide supply part is omitted. ing. Carbon dioxide gas is supplied to the first water treatment member 1, where the first stage carbon dioxide gas is pulverized and dissolved, and the second water treatment member 1 ′ is not yet removed by the first water treatment member 1. The dissolved carbon dioxide gas is further pulverized and dissolved. The plurality of water treatment members 1, 1 ′ connected in series can pulverize and dissolve the carbon dioxide step by step, thereby greatly increasing the carbon dioxide dissolution efficiency. Of course, the number of water treatment members arranged in series can be three or more. In addition, the structure which distributes and supplies carbon dioxide gas to each of two or more of several water treatment members by another path | route, for example, in FIG. 21, 2nd water treatment member 1 'is the 1st which had the carbon dioxide gas supply part. It is also possible to adopt a configuration in which the same water treatment member 1 is replaced.

  In FIG. 22, the carbon dioxide supply unit is configured as a gas injection nozzle 60 provided on the water inflow pipe 18 connected to the inlet of the member body 6. The gas injection nozzle 60 is formed as a well-known venturi pipe, and the gas supply line 12 is connected to the gas suction hole 60h communicating with the throttle portion to supply the carbon dioxide gas G, and the downstream water treatment member 1 ′. Will be crushed and dissolved.

  On the other hand, in the water treatment member 1 ″ of FIG. 23, a gas supply passage 3h is formed in the axial direction of the collision portion 3 (screw member), and a gas supply conduit 12 is connected thereto via a connector 11 here. In this case, the inner diameter of the gas supply passage 3h is contracted by the outer dimensions of the collision portion 3, but if the gas supply flow rate is insufficient, as shown in FIG. In addition, it is possible to increase the amount of carbon dioxide supplied by forming the same gas supply passage 3h in at least two of the plurality of collision portions 3 and distributing and supplying carbon dioxide.

  Moreover, as shown in FIGS. 25-27, it is also possible to branch the water distribution pipe 18 into a plurality on the way, and to provide a plurality of water treatment members 1 in parallel on the branched flow pipes. The carbon dioxide supply unit is configured to supply carbon dioxide to at least one of the water treatment members connected in parallel. By using a plurality of water treatment members in parallel, a necessary amount of carbon dioxide can be efficiently dissolved even when the flow rate of water to be treated is large.

  In FIG. 25, the water treatment member 1 having the same configuration as that of FIG. 2 in which the carbon dioxide supply part is formed is provided in each of the branched flow pipes. For each water treatment member 1, a gas supply pipe 12 connected to the same carbon dioxide gas source (for example, gas cylinder) is branched and distributed to each water treatment member 1. If each of the branched gas supply pipes 12 is provided with a flow rate adjusting valve 29 that individually adjusts the flow rate of the supplied carbon dioxide gas, the supply amount of the carbon dioxide gas can be adjusted according to the water supply status to each water treatment member 1. It can be optimized (but can be omitted).

  Further, as shown in FIG. 26, a plurality of water treatment members 1 ′ that do not form a carbon dioxide supply section are distributed and arranged in parallel, and the gas injection nozzle 60 (FIG. 26) is located upstream from the distribution branch point. 22 can also be provided. Carbon dioxide gas can be uniformly distributed to each water treatment member 1 ′.

  On the other hand, as shown in FIG. 27, a carbon dioxide gas supply unit (only a part of the water treatment members 1 and 1 ′ distributed and arranged in parallel (here, the water treatment member 1 ′ on the lower side of the drawing)) ( A gas supply pipe 12 + gas injection pipe 10 (similar to FIG. 2) may be provided, and a structure in which carbon dioxide gas is dissolved and water and undissolved water are mixed and discharged is also possible. As shown in FIG. 28, a plurality of sets of water treatment members 1 and 1 'connected in series as disclosed in FIG. 21 can be branched and connected in parallel.

  Next, as shown in FIG. 30 (the same reference numerals are given to the same components as in FIG. 1 and the detailed description is omitted. An aqueous sodium hypochlorite solution can be used instead of water. In this configuration, a tank 50 for storing a sodium hypochlorite aqueous solution is provided, and the solution is supplied to the water inlet 19 by a pump 53. Thereby, carbon dioxide gas is efficiently dissolved in the sodium hypochlorite aqueous solution. The pH value of the aqueous sodium hypochlorite solution is kept at a weak acidity of about 4.3 to 6, and the concentration of hypochlorous acid in a dissociated state effective for sterilization and disinfection can be greatly increased. The pH buffering action can also reduce the fluctuation of the pH value. For example, the phenomenon of undershooting to a lower value of 3 or less than the conventional pH adjustment method by adding hydrochloric acid is extremely generated. The sodium hypochlorite aqueous solution has a concentration of hypochlorite ions adjusted to 10 ppm or more and 1000 ppm or less, and the dissolved concentration of carbon dioxide gas is 200 ppm or more and 1500 ppm. The dissolution concentration of carbon dioxide is adjusted to 200 ppm or more and 1500 ppm or less, so that the pH value of the sodium hypochlorite aqueous solution is 4.3 to 6 and stable in the pH range where the disinfection effect is optimized. Can be maintained.

A water treatment member in which specific dimensions of the flow path and the collision portion in FIG. 2 were determined as follows was prepared.
・ Inlet 2n and outlet 2x: Inner diameter = 10 mm
-Restricted portion 2c: inner diameter D2 = 5.3 mm, flow path length L2 = 6 mm
-Collision part 3: Screw outer diameter: M2, the tip part is a point including a shaft with a tip angle of 90 ° (however, number 9 in Table 1 has no thread)
The size of the center gap 2k (the length between the pointed ends of the opposing collision part 3): 0.18 mm (however, numbers 8 and 9 in Table 1 have no gap)

  A hose was connected to the water treatment member, hot water at 38 ° C. was supplied to the inlet 2n at various supply pressures as shown in Table 1, the flow rate was measured, and the average flow velocity at the throttle portion was calculated. Two water treatment members were prepared and connected in parallel in the form shown in FIG. 27, and carbon dioxide was supplied to only one of them at various flow rates with an original supply pressure of 0.3 MPa. While measuring the pH and carbon dioxide concentration of the obtained carbon dioxide-dissolved water, undissolved carbon dioxide was collected by water replacement, and its volume was measured, and the carbon dioxide dissolution efficiency was calculated. The above results are summarized in Table 1.

  The dynamic water pressure of the water flow supplied to the water treatment member is 0.06 MPa or more, the average flow velocity of the water flow at the throttle part is 3.3 m / second or more, and the carbon dioxide gas flow rate in terms of atmospheric pressure to the water treatment member by the carbon dioxide supply part Is A and the water flow rate is B, the carbon dioxide gas flow rate is adjusted so that the value of A / B is 0.2 or more and 1.3 or less, so that the dissolution efficiency of carbon dioxide gas in water is 70. It can be seen that it can be increased to more than%. In particular, even when a large amount of carbon dioxide gas having an A / B value exceeding 0.6 is circulated, by adopting the configuration of the water treatment member having a configuration unique to the present invention, this can be achieved very quickly and 70 It is possible to dissolve at a high efficiency of at least%. At this time, the dissolution concentration of carbon dioxide gas is set to a high concentration of 200 ppm to 1500 ppm.

  In addition, about the water sample of each number of Table 1, after letting water in a water tank and letting it stand for 1 minute and raising a rough bubble, with a laser diffraction type particle size distribution measuring device (Corporation Shimadzu Corporation: SALD7100H), The bubble size distribution was measured. Then, ultra fine bubbles having an average diameter of 0.1 μm to 0.4 μm were detected for all the water except for No. 9.

DESCRIPTION OF SYMBOLS 1,1 Water treatment member 2c Restriction part 2e Segment area | region 2n Inlet 2x Outlet 3,30,30 ', 130 Colliding part 5t Conical part 5r Restriction rib 6 Member main body 12 Gas supply line (carbon dioxide supply part)

Claims (14)

An inflow end that is a water inflow side and an outflow end that is a water outflow side are defined, and a water flow path that connects an inflow opening that opens to the inflow end and an outflow opening that opens to the outflow end is formed in a through shape. A member main body in which a throttle part having a smaller flow cross-sectional area than the inlet is formed at an intermediate position of the flow path, and the axial section of the flow path is divided into two or more segment regions by the throttle part A water treatment member having a collision portion that protrudes from the inner peripheral surface of the flow path and has a plurality of circumferentially-shaped throttle ribs on the outer peripheral surface, and further reduces the flow path cross-sectional area of the throttle portion;
A carbon dioxide gas supply section for introducing carbon dioxide gas from a carbon dioxide gas supply source located outside the member main body into the water flow path of the member main body,
After the water flow supplied to the inflow end of the member body of the hydraulic member collides with the collision part, the water flow is increased while passing through the segment areas, and is directly passed to the collision part. A carbon dioxide gas dissolving apparatus, wherein the carbon dioxide gas is involved in a turbulent flow region formed downstream, mixed, pulverized, and dissolved. The high-speed flow gap which further speeds up the water flow in the said throttle part is formed between the front-end | tip parts of two or more things of the said collision part which protrudes from the said internal peripheral surface of the said throttle part. Carbon dioxide gas dissolving device. The carbon dioxide gas dissolving device according to claim 1, wherein the collision portion is formed by the throttle portion so as to divide an axial cross section of the water flow path into three or more segment regions. The high-speed flow gap which further speeds up the water flow in the said throttle part is formed between the front-end | tip parts of two or more things of the said some collision part which protrudes from the said internal peripheral surface of the said throttle part. Carbon dioxide gas dissolving device. A conical portion that reduces the axial cross section toward the distal end is formed at the distal end portion of the collision portion, and the two collision portions adjacent to each other with the segment region interposed between the outer peripheral surfaces of the conical portions. The carbon dioxide gas dissolving device according to claim 2, wherein a slit portion constituting the high-speed flow gap is formed. The carbon dioxide supply part is formed in the wall part of the member main body on the upstream side of the collision part, and has one end opened as a gas outlet on the inner peripheral surface of the water passage, and the other end of the member main body. The carbon dioxide dissolving apparatus according to any one of claims 1 to 5, further comprising a gas supply passage that opens as a carbon dioxide supply port on an outer surface. The carbon dioxide dissolving apparatus according to claim 6, wherein the gas outlet of the gas supply passage is opened to the throttle portion. 6. The carbon dioxide gas dissolving device according to claim 1, wherein the carbon dioxide supply unit is a gas injection nozzle provided on a water inflow pipe connected to the inflow port of the member main body. . The water treatment member includes an upstream first water treatment member and a downstream and second water treatment member arranged in series in the water flow direction, and the carbon dioxide supply unit is The carbon dioxide gas is supplied to a first water treatment member, and the second water treatment member further pulverizes and dissolves the undissolved carbon dioxide gas in the first water treatment member. The carbon dioxide gas dissolving device according to any one of claims 1 to 8. The water distribution pipe is branched into a plurality of parts along the way, and a plurality of the water treatment members are provided in parallel on the branched flow pipes, and the carbon dioxide supply part is connected to the water treatment members connected in parallel. The carbon dioxide gas dissolving device according to any one of claims 1 to 9, wherein the carbon dioxide gas is supplied to at least one of them. The dynamic water pressure of the water flow supplied to the water treatment member is 0.06 MPa or more and 0.5 MPa or less, the average flow velocity of the water flow in the throttle portion is 3.3 m / second or more and 10 m / second or less, and the carbon dioxide supply When the carbon dioxide flow rate in terms of atmospheric pressure to the water treatment member by the part is A and the water flow rate is B, the carbon dioxide gas flow rate is adjusted so that the value of A / B is 0.2 or more and 1.3 or less. The carbon dioxide dissolving apparatus according to claim 1, wherein the flow rate is adjusted. The carbon dioxide gas dissolving device according to claim 11, wherein a dissolution concentration of the carbon dioxide gas is 200 ppm to 1500 ppm. The carbon dioxide dissolving apparatus according to any one of claims 1 to 12, wherein an aqueous sodium hypochlorite solution is used as the water. The carbon dioxide dissolving apparatus according to claim 13, wherein a hypochlorite ion concentration in the sodium hypochlorite aqueous solution is adjusted to 10 ppm to 1000 ppm, and a dissolution concentration of the carbon dioxide gas is adjusted to 200 ppm to 1500 ppm.

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