JP4065738B2 - Ozone water generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ozone water generator for generating ozone water used for, for example, food cleaning and sterilization.
[0002]
[Prior art]
As a conventional ozone water generator, as shown in FIG. 8, there is one that generates ozone water A by mixing ozone from an ozone supply unit 48 and water W from a water supply unit 49 in a pump 50. .
[0003]
The ozone supply unit 48 includes, in order from the upstream side, an oxygen cylinder 51, a flow meter 52, an ozonizer 53 for converting oxygen from the oxygen cylinder 51 into ozone, and a solenoid valve 54. Further, the water supply unit 49 was provided with a water supply source (not shown) and a pressure reducing valve 55 in order from the upstream side. Further, a pressure gauge 56 is provided on the downstream side of the pump 50, and a fan 57 for cooling the ozonizer 53 is provided in the vicinity of the ozonizer 53.
[0004]
[Problems to be solved by the invention]
However, in the above ozone water generator, ozone and water are mixed in the pump 50 to generate ozone water. However, the flow velocity of ozone and water flowing by the pump 50 is too large, Insufficient dissolution. Therefore, there is a problem that a lot of ozone that does not dissolve in the water and flows wastefully in the state of gas, and that a lot of harmful ozone gas is generated leads to an increase in danger. In addition, there is a problem that the ozone dissolution rate in the generated ozone water is low, and it is difficult to improve the cleaning power and sterilizing power of the ozone water.
[0005]
The present invention has been made in view of such circumstances, and the object thereof is to increase the dissolution rate of ozone, and thus to reduce the risk associated with the generation of ozone gas and the cleaning power of ozone water. -It is providing the ozone water production | generation apparatus which can aim at the improvement of sterilization power easily.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an ozone water generating apparatus of the present invention has an oxygen supply means and an ozonizer, an ozone supply section in which the flow rate of oxygen from the oxygen supply means is variable, and for supplying water An ozone water generator comprising: a water supply unit; and a mixing unit that dissolves ozone from the ozone supply unit into water from the water supply unit to form ozone water, wherein the mixing unit is in order from the upstream side. And a melting tank into which the combined ozone and water are introduced. The melting tank has an approximately spherical surface with an inner wall surface projecting downward. a plurality of overflow reservoir formed at Jo vertically, after the ozone and water merge at the merging portion is introduced into the overflow tank top, toward the lower side in sequence through each overflow tank Is generated ozonized water with this, also, the ozone water is Yes constitutes a so that retrieved into the dissolving tank outside of the outlet on the underside of the bottom of the overflow tank, the dissolution tank, the ozone water Is also used as a storage tank for storing (claim 1).
[0007]
Further, a discharge flow path for discharging ozone gas in the dissolution tank is provided, and the discharge flow path may include a filter member made of plant fibers for decomposing and detoxifying the ozone gas. Good (claim 2).
[0008]
According to said structure, the ozone dissolution rate can be raised, and by extension ozone water generation | occurrence | production which can aim at the reduction of the danger accompanying ozone gas generation | occurrence | production, and the improvement of the cleaning power and disinfection power which ozone water has easily An apparatus can be provided.
[0009]
Further, since the flow rate of oxygen supplied from the oxygen supply means is variable, the ozone concentration of the generated ozone water can be freely set.
[0010]
Furthermore, since the dissolution tank is also used as a storage tank for storing the ozone water, means for dissolving ozone in water and generating ozone water, and for storing the generated ozone water The structure can be made compact as compared with the case where a separate storage means is provided.
[0011]
Further, since the inner wall surface of the overflow tank is formed in a substantially spherical shape projecting downward, for example, compared to the case where the inner wall surface of the overflow tank is formed to have a U-shaped cross section. Therefore, the convection of ozone and water introduced into the overflow tank will be performed in a more ideal state, and stagnation and the like in the overflow tank will be less likely to occur, so that mixing of ozone and water will be further promoted. It becomes.
[0012]
In addition, the ozonizer includes a plurality of electrodes and a case for accommodating these electrodes, and has cooling fins that protrude parallel to each other on the outer surface of the case and sends air to the cooling fins. An air blowing means may be provided (claim 3). In this case, when the voltage is applied to the electrode and the discharge is performed, it becomes possible to efficiently cool the electrode that has reached a high temperature. It is possible to prevent the rate from decreasing.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram schematically showing the configuration of an ozone water generating device (hereinafter referred to as a generating device) D for carrying out an ozone water generating method (hereinafter referred to as a generating method) according to an embodiment of the present invention. FIG. 2 is an explanatory diagram schematically showing a configuration of a main part of the generating device D. As shown in FIG.
The generator D is a mixture of ozone (A ₃ ) by dissolving (dissolving) ozone (O ₃ ) from the ozone supply unit 1, the water supply unit 2, and the ozone supply unit 1 in the water W from the water supply unit 2. A part 3 and a takeout part 4 for taking out the ozone water A from the mixing part 3 are provided.
[0014]
The ozone supply unit 1 includes, in order from the upstream side, an oxygen supply means 5 made of, for example, an oxygen cylinder, a pressure switch 6, a solenoid valve 7, a regulator 8, a flow meter 9, an ozonizer 10, a strainer 11, An electromagnetic valve 12, a water reverse prevention switch 13 and a check valve 14 are provided.
[0015]
The oxygen supply means 5 has a regulator 5a and supplies oxygen gas to the downstream side at a constant pressure (for example, 0.2 mpa). The oxygen supply means 5 is configured so that the pressure of oxygen to be supplied can be freely set, whereby the flow rate of oxygen to be supplied is variable.
[0016]
The regulator 8 is configured to send the oxygen gas from the oxygen supply means 5 to a constant pressure (for example, 0.1 mpa or less) and further to the downstream side.
[0017]
The flow meter 9 is, for example, an air flow meter, and the oxygen gas from the oxygen supply means 5 is supplied so that, for example, the measurement value of the meter 9 is 2 L / min.
[0018]
As shown in FIG. 3, the ozonizer 10 includes two electrodes 15 and 16 arranged in an opposing state, an application means 17 for applying an alternating voltage to the two electrodes 15 and 16, and a fixed to one electrode 16. And a case 19 for housing these two electrodes 15 and 16 and the dielectric 17.
[0019]
The electrodes 15 and 16 are made of, for example, stainless steel, and the dielectric 18 is made of, for example, glass.
[0020]
The case 19 is made of, for example, aluminum, and has a gas inlet (not shown) for introducing gas upstream thereof, and a gas outlet 19a for leading internal gas downstream thereof. Respectively. Further, a plurality of cooling fins 19b, 19b,... That are parallel to each other are projected from the outer surface (right and left side surfaces) of the case 19.
[0021]
In the vicinity of the case 19, fans 20 and 20 are provided as blowing means for sending air toward the cooling fins 19b, 19b.
[0022]
That is, in the ozonizer 10 having the above configuration, when the switch 17a of the applying means 17 is turned on, discharge (silent discharge) is performed in the case 19, and in this state, oxygen gas is introduced into the case 19 Then, ozone is generated by the discharge. At this time, the discharge causes the entire ozonizer 10 to have a high temperature. However, the wind from the fans 20 and 20 is sent toward the cooling fins 19b and 19b, whereby the case 19 is efficiently cooled. The entire ozonizer 10 is cooled.
[0023]
Further, when the switch 17a of the applying means 17 is turned OFF, no discharge is performed in the case 19, so that oxygen from the oxygen supplying means 5 passes through the ozonizer 10 without becoming ozone. Become.
[0024]
The strainer 11 has a filter 11 a for removing metal powder generated when discharging is performed in the ozonizer 9.
[0025]
The water supply unit 2 includes a water supply source (not shown), a pressure reducing valve 21, a flow switch 22, a primary pressure gauge 23, and a check valve 24 in order from the upstream side.
[0026]
And the said water supply part 2 is comprised so that the water W can be supplied to the downstream by arbitrary flow volume.
[0027]
The mixing unit 3 includes, in order from the upstream side, a merge unit 25 where ozone from the ozone supply unit 1 and the water W from the water supply unit 2 merge, and a dissolution tank 26 into which the merged ozone and water W are introduced. It has.
[0028]
4A is a longitudinal sectional view schematically showing the structure of the dissolution tank 26, and FIG. 4B is a sectional view taken along line XX of FIG. 4A.
The dissolution tank 26 has a plurality of (three in this embodiment) overflow tanks 27 formed in a substantially spherical shape (semispherical shape) with an inner wall surface protruding downward, and above each overflow tank 27. The ozone pipe and the water merged at the merge section 25 pass through the overflow tanks 27 and the introduction pipes 28 alternately and sequentially.
[0029]
Specifically, the inside of the dissolution tank 26 is divided into a plurality (three in the present embodiment) of compartments 30, 30... Are provided with a plurality of (three in this embodiment) bridges 27a, 27a,... On the side wall of each compartment 30 (dissolution tank 26). Further, a groove 27b for allowing the overflowing ozone and water W to flow downward is provided at the periphery of each overflow tank 27.
[0030]
In each compartment 30, the introduction pipe 28 is arranged so that the lower end faces the overflow tank 27. In addition, a through hole 29 a is formed in the substantially central portion of the isolation wall 29, and each of the second and lower compartments 30 from the top of the dissolution tank 26 (that is, the uppermost compartment in the dissolution tank 26). Each introduction pipe 28 provided in each compartment 30 except for 30 is in a state of being inserted through the through hole 29a of the isolation wall 29 forming the upper wall of each compartment 30, and its upper end portion 28a is It is in a state of projecting inside the compartment 30 on the upper side through the isolation wall 29.
[0031]
Each of the introduction pipes 28 provided in the second and lower compartments 30 from the top in the dissolution tank 26 has a tapered shape with an upper end portion 28a having a larger diameter toward the upper side. The upper end is located above the upper surface of the inserted isolation wall 29. On the other hand, the introduction pipe 28 provided in the uppermost compartment 30 in the dissolution tank 26 differs from the other introduction pipes 28 in that the ozone and water W from the junction 25 are dissolved in the dissolution tank 26. The upper end 28a may be included because it is for introduction into the interior, but it does not have to be included.
[0032]
In addition, a pressure gauge 31 for measuring and displaying the pressure inside the dissolution tank 26 is provided at an appropriate location of the dissolution tank 26 (in this embodiment, the side wall of the second compartment 30 from the top). Yes.
[0033]
Furthermore, a takeout port 32 for taking out the ozone water A generated in the dissolution tank 26 is provided in the bottom wall of the dissolution tank 26 (that is, the bottom wall of the lowest compartment 30).
[0034]
In addition, a partition wall 33 inserted through the introduction pipe 28 is disposed at an appropriate distance above the upper end of each overflow tank 27 disposed in each of the second and lower compartments 30 from the top in the dissolution tank 26. Is provided. The partition wall 33 need not be provided.
[0035]
Connected to the upper part of the dissolution tank 26 is a discharge flow path 34 for discharging ozone that is not dissolved in the water in the dissolution tank 26 but is in a gas state to the outside in a decomposed and detoxified state. Has been.
[0036]
In the discharge flow path 34, in order from the upstream side, a buffer tank 35, a check valve (pressure check valve) 36, and a filter member 37a for decomposing and detoxifying ozone (ozone gas) are substantially tubular (cylindrical). ) And an ozone treatment unit 38 built in the case body 37b.
[0037]
The said filter member 37 consists of plant fibers, such as sawdust used as the means (adsorbent) which absorbs ozone (ozone gas), for example. As the sawdust, sawdust such as cedar, cypress and bamboo can be used.
[0038]
On the other hand, inside the dissolution tank 26, a delivery passage 39 for sending out ozone gas in the dissolution tank 26 to the discharge passage 34 is provided. Here, the delivery flow path 39 is provided in a state in which the upper part in each compartment 30 is communicated, so that the ozone gas existing in each compartment 30 passes through the delivery flow path 39, and the This leads to the discharge channel 34.
[0039]
A flow path 41 having a check valve 40 is connected upstream of the dissolution tank 26 having the above-described configuration, that is, between the dissolution tank 26 and the junction 25.
[0040]
The ozone and water W from the merging section 25 introduced into the dissolution tank 26 having the above-described configuration are first accommodated in the overflow tank 27 in the uppermost compartment 30, and a predetermined amount is stored in the overflow tank 27. When the above ozone and water W are stored, it overflows and flows down from the groove 27b provided at the peripheral edge of the overflow tank 27 toward the upper surface of the isolation wall 29 below.
[0041]
Then, the upper end of the upper end portion 28a of the introduction pipe 28 that extends from the uppermost compartment 30 in the dissolution tank 26 to the compartment (the second compartment from the top) 30 immediately below it in the dissolution tank 26 rather than the upper surface of the isolation wall 29. Since the ozone and the water W are stored at a higher position, the ozone and the water W are also stored above the isolation wall 29 by a predetermined amount, and flow into the introduction pipe 28 by overflowing.
[0042]
The ozone and water W that have flowed into the introduction pipe 28 as described above are accommodated in the overflow tank 27 in the second compartment 30 from the top in the dissolution tank 26, and thereafter, in the same manner as described above. One by one goes to the lower compartment 30 and finally led out from the take-out port 32 to the downstream side of the dissolution tank 26.
[0043]
And as the ozone and water W introduced into the dissolution tank 26 go to the lower side of the dissolution tank 26, the ozone dissolves in the water W, and the dissolved rate of ozone in the water W increases. Ozone water A in which almost all of the supplied ozone (98% or more in this embodiment) is dissolved in the water W is generated.
[0044]
On the other hand, in each of the compartments 30, ozone (ozone gas) that is in a gas state without being dissolved in the water W reaches the upper space of each compartment 30 and is connected to the upper side of each compartment 30. It goes from the delivery channel 39 to the space above the dissolution tank 26. After that, it is discharged to the outside through the discharge flow path 34 in a state communicating with the space above the dissolution tank 26.
[0045]
Since the dissolution tank 26 has a structure capable of storing the ozone and water W in the overflow tanks 27 and on the isolation walls 29 as described above, The dissolution tank 26 can also be used as a storage tank for storing the ozone water A.
[0046]
The take-out unit 4 has a secondary pressure gauge 42 and a check valve 43 in order from the upstream side, and its upstream end is connected to the take-out port 32 of the dissolution tank 26 of the mixing unit 3. The ozone water A from the dissolution tank 26 is connected to the supply target from its downstream end side.
[0047]
In the ozone water generator D having the above-described configuration, the ozone from the ozone supply unit 1 and the water W from the water supply unit 2 merge at the merge unit 25 of the mixing unit 3, and then the upper and lower sides in the dissolution tank 26. By sequentially passing through a plurality of overflow tanks arranged in the direction, ozone is dissolved in the water W, and high-concentration ozone water A is generated.
[0048]
And in the ozone water generating apparatus D having the above-described configuration, the ozone can be reliably dissolved in the water W by reducing the flow velocity of the ozone and the water W in the dissolution tank 26 of the mixing unit 3. The ozone dissolution rate (ozone concentration) can be increased, and the cleaning power and sterilization power of ozone water can be easily improved.
[0049]
Moreover, since the quantity of ozone which will be in a gas state without melt | dissolving in the water W can be reduced by raising the dissolution rate of ozone, the danger accompanying ozone gas generation | occurrence | production will fall.
[0050]
Further, since the flow rate of oxygen supplied from the oxygen supply means 5 is variable, and the amount of ozone generated by the ozonizer 10 is variable accordingly, the ozone concentration of the ozone water A to be generated is changed. It can be set freely. Further, by adjusting not only the flow rate of ozone from the ozone supply unit 1 but also the flow rate of water W from the water supply unit 2, the flow rate and ozone concentration of the generated ozone water A can be set more easily and finely. It becomes possible to do.
[0051]
Further, in the ozone water generator D having the above-described configuration, the switch 17a of the ozonizer 10 is turned OFF, oxygen from the oxygen supply means 5 is sent to the mixing unit 3 as it is, and the oxygen is supplied to the mixing unit 3 by the mixing unit 3. If dissolved in the water W from the water supply unit 2, high oxygen water can be generated.
[0052]
In addition, since the case 19 of the ozonizer 10 has cooling fins 19b, 19b,... On the outer surface, the ozonizer that becomes a high temperature when discharging is performed by applying a voltage to the two electrodes 15, 16. 10 can be efficiently cooled by the fan 20.
[0053]
Moreover, since the said dissolution tank is used also as a storage tank for storing the said ozone water A, the means for melt | dissolving ozone in water and producing | generating ozone water A, and the produced | generated ozone water A are stored. Therefore, the structure can be made compact as compared with the case where a separate storage means is provided.
[0054]
In the above embodiment, as shown in FIG. 4 (A), each introduction pipe 28 of the dissolution tank 26 is substantially linear. However, the present invention is not limited to this configuration. For example, FIG. As shown in FIG. 4, the introduction pipes 28 may be formed in a spiral shape. In the case of such a configuration, it is possible to increase the moving time and moving distance of ozone and water W when passing through the introduction pipe 28, and the dissolution of ozone in the water W is further promoted.
[0055]
In the above embodiment, as shown in FIG. 2, a filter member 37a for decomposing and detoxifying ozone (ozone gas) is built in the substantially tubular (cylindrical) case body 37b as shown in FIG. However, instead of the filter member 37a, a bag-like body 44 having the configuration shown in FIG. 6 may be incorporated in the case body 37b.
[0056]
That is, the said bag-like body 44 becomes a means (adsorbent) which absorbs ozone (ozone gas), for example, plant pieces, powder (sawdust), etc. in the bag 45 which is made of cotton and has air permeability. It contains fibers.
[0057]
In addition, as sawdust used for the said filter part seat 37a and the bag-shaped body 44, sawdust, such as a cedar material, a cypress material, a bamboo material, can be used, for example.
[0058]
And the said bag-like body 44 of the state which absorbed ozone by passing ozone through the inside decomposes | disassembles spontaneously, for example, when it returns to soil (specifically, embedding / dispersing etc.), at this time, soil Since the function as an improving material is also demonstrated, the merit that the said ozone can be used effectively is acquired.
[0059]
The ozone treatment unit 38 is not limited to the one having the above two configurations, and may be one that, for example, heats ozone by a heating means such as a heater, thereby decomposing and detoxifying the ozone.
[0060]
Moreover, you may provide the said water supply part 3 with the pure water means 45 shown in FIG. That is, the pure water purifying means 45 is for purifying the water W from the water supply source of the water supply section 3 and is disposed in an approximately tubular (cylindrical) case body 45a in order from the upstream side. An ion exchange membrane 46 and an RO membrane 47 are provided. The water W from the water supply source passes through the ion exchange membrane 46 and the RO membrane 47 and is then sent to the mixing unit 3 on the downstream side.
[0061]
Then, the water W from the water supply source passes through the ion exchange membrane 46, thereby removing Na, Mg, etc. contained in the water W. By passing through the RO membrane 47, the water W Fe, SiO _{2 and the} like contained in W are removed.
[0062]
The ozone water A produced by dissolving the ozone from the ozone supply unit 1 in the water W purified as described above in the mixing unit 3 has high purity, so the sterilizing power is increased, Further, for example, it can be used for cleaning a semiconductor wafer.
[0063]
Moreover, in the said Example, although the number of the overflow tanks 27 provided in the dissolution tank 26 is set to three, it is not restricted to such a structure. For example, when the concentration of ozone (or oxygen) dissolved in the water W is set to a high concentration (8 ppm or more), the overflow tank 27 may be provided in five or more stages.
[0064]
In the above embodiment, the ozone supply unit 1 is provided with oxygen supply means 5 for supplying oxygen gas. However, the present invention is not limited to such a configuration. For example, instead of the oxygen supply means 5, Air supply means (not shown) may be provided to supply air instead of oxygen gas. However, in this case, NO _x is generated when air is passed through the ozonizer 10. Therefore, it is desirable to separately provide a means for removing this NO _x on the downstream side of the ozonizer 10 in the ozone supply unit 1.
[0065]
In addition, the production | generation method of a present Example can be implemented using the production | generation apparatus D which consists of said structure, The effect similar to the said production | generation apparatus D can be acquired.
[0066]
【The invention's effect】
As described above, according to the present invention, the dissolved rate of ozone can be increased, and consequently, the risk associated with the generation of ozone gas can be reduced, and the cleaning power and sterilization power of ozone water can be easily improved. It is possible to provide an ozone water generating apparatus capable of performing the above.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram schematically showing a configuration of an ozone water generating apparatus for carrying out an ozone water generating method according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram schematically showing a configuration of a main part of the embodiment.
FIG. 3 is an explanatory diagram schematically showing a configuration of an ozonizer in the embodiment.
4A is a longitudinal sectional view schematically showing a configuration of a dissolution tank in the above embodiment, and FIG. 4B is a transverse sectional view schematically showing a main part of the dissolution tank.
FIG. 5 is an explanatory view schematically showing a configuration of a modified example of the introduction pipe in the embodiment.
FIG. 6 is an explanatory diagram schematically showing a configuration of a modified example of the ozone treatment unit in the embodiment.
FIG. 7 is an explanatory view schematically showing a configuration of a pure water purification unit in the embodiment.
FIG. 8 is an explanatory view schematically showing a configuration of a conventional ionic water generating apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Ozone supply part, 2 ... Water supply part, 3 ... Mixing part, 5 ... Oxygen supply means, 10 ... Ozonizer, 26 ... Dissolution tank, 27 ... Overflow tank, A ... Ozone water, D ... Ozone water production | generation apparatus, W ... water.

Claims (3)

An ozone supply section having an oxygen supply means and an ozonizer, wherein the flow rate of oxygen from the oxygen supply means is variable; a water supply section for supplying water; and ozone from the ozone supply section for supplying water from the water supply section An ozone water generating device including a mixing unit dissolved in the ozone water, wherein the mixing unit joins ozone from the ozone supply unit and water from the water supply unit in order from the upstream side. comprising a part, and a dissolution tank confluence ozone and water is introduced, the dissolution tank has a plurality of overflow vessel whose inner wall surface formed in a substantially spherical convex downward in the vertical direction, the merging unit after the ozone and water having been mixed is introduced into the overflow tank top in, toward the lower side in sequence through each overflow tank, ozone water Along with this is generated, also, the ozone water bottom Yes it configured to so that retrieved from the outlet to the dissolving tank outside at the bottom of the overflow tank, characterized in that the dissolution tank, are allowed to also used as storage tank for storing the ozone water Ozone water generator.   The discharge flow path for discharging | emitting ozone gas in the said dissolution tank is provided, This discharge flow path is equipped with the filter member which consists of a vegetable fiber for decomposing | disassembling and detoxifying the said ozone gas. The ozone water generator described.   The ozonizer includes a plurality of electrodes and a case that accommodates the electrodes, and has a cooling fin that protrudes parallel to each other on the outer surface of the case and blows air to the cooling fin. The ozone water generator according to claim 1 or 2, wherein

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