JP2012164560A - Plasma generating device, and cleaning/purifying device and small electric appliance using plasma generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma generating device that generates radicals more stably, and to provide a cleaning/purifying device, and a small electric appliance, using the plasma generating device.SOLUTION: A plasma generating device 1 includes: a liquid storage 4 where a liquid 17 including water is stored; a gas storage 5 where a gas is stored; a partition 3 that separates the liquid storage 4 and the gas storage 5 and has a gas passage 3a formed therein that guides the gas from the gas storage 5 to the liquid storage 4; a first electrode 12 that is provided in the gas storage 5; and a second electrode 13 that is provided in such a manner that at least a portion thereof on a side pairing up with the first electrode 12 is in contact with the liquid 17 in the liquid storage 4. The gas passage 3a is provided with a microfine-bubble forming means that forms microfine bubbles.

Description

  The present invention relates to a plasma generator, a cleaning and purifying apparatus using the plasma generator, and a small electric appliance.

  2. Description of the Related Art Conventionally, it is known that radicals or the like are generated in bubbles by performing discharge in a liquid containing bubbles to modify the liquid (for example, see Patent Document 1).

JP 2001-9463 A

  However, various impurities and the like are included in the liquid to be processed, and the electrical resistance value of the liquid greatly varies depending on these components included in the liquid. Therefore, in the method using the submerged discharge as in the above prior art, even if a predetermined voltage is applied between the electrodes, there is a possibility that the manner in which the discharge is generated may vary, and plasma can be generated stably. could not. That is, in the above-described conventional technique, there is a possibility that the generation amount of radicals and the like may vary.

  Therefore, an object of the present invention is to obtain a plasma generator capable of generating radicals more stably, a cleaning and purifying apparatus using the plasma generator, and a small electric appliance.

  In the present invention, a liquid storage portion that stores a liquid containing water, a gas storage portion that stores gas, and a gas passage that guides the gas in the gas storage portion to the liquid storage portion are formed, and the liquid A partition that separates the accommodating portion and the gas accommodating portion, a first electrode disposed in the gas accommodating portion, and a portion that is spaced apart from the first electrode and at least forms a pair with the first electrode Is a second electrode disposed so as to be in contact with the liquid in the liquid container, and a gas containing oxygen in a mode in which the gas in the gas container is pumped to the liquid container through the gas passage. A predetermined voltage is applied between the gas supply unit supplied to the gas storage unit, the first electrode, and the second electrode to generate a discharge between the first electrode and the second electrode. Plasma that converts the gas introduced into the gas storage portion into plasma A plasma generating apparatus comprising a source unit, and is mainly characterized in that a miniaturized means for fine bubbles in the gas passage.

  In addition, the cleaning and purifying apparatus of the present invention is characterized in that it includes the above plasma generator.

  The main feature of the small electric appliance of the present invention is that it includes the plasma generator or the cleaning and purifying device.

  According to the plasma generator of the present invention, since the bubbles are made finer by the finer means, the surface area per unit volume of the bubbles is increased, and ozone and hydroxy radicals generated at the gas-liquid boundary surface Etc. can be increased. As a result, a large amount of ozone, hydroxy radicals, etc. can be generated more stably.

  Further, by providing the above-described plasma generator in the cleaning and purifying apparatus and the small electric appliance, it is possible to obtain the cleaning and purifying apparatus and the small electric appliance that can generate radicals more stably.

FIG. 1 is a diagram including a partial cross-section schematically showing the configuration of the plasma generator according to the first embodiment of the present invention. FIG. 2 is a graph showing voltage values applied to the first electrode and the second electrode of the plasma generator according to the first embodiment of the present invention. FIG. 3 is a partially enlarged cross-sectional view schematically showing one state for explaining the operation of the plasma generator according to the first embodiment of the present invention. 4 is a partially enlarged cross-sectional view schematically showing a state after the state shown in FIG. FIG. 5 is a diagram including a partial cross-section schematically showing the configuration of the plasma generator according to the first modification of the first embodiment of the present invention. FIG. 6 is a diagram including a partial cross-section schematically showing the configuration of the plasma generator according to the second modification of the first embodiment of the present invention. FIG. 7 is a diagram including a partial cross-section schematically showing the configuration of the plasma generating apparatus according to the third modification of the first embodiment of the present invention. FIG. 7A schematically shows the case where the liquid flow rate is large. (B) is a figure including the partial cross section which shows typically the case where the flow velocity of a liquid is small. FIG. 8 is a plan view schematically showing a partition wall portion of a plasma generator according to a third modification of the first embodiment of the present invention, and (a) schematically shows a case where the liquid flow rate is large. FIG. 4B is a plan view schematically showing a case where the flow velocity of the liquid is small. FIG. 9 is a diagram including a partial cross section schematically showing the configuration of the plasma generating apparatus according to the fourth modification of the first embodiment of the present invention. FIG. 10 is a perspective view showing a specific example of a small electric appliance provided with the plasma generator according to the second embodiment of the present invention. FIG. 11 is a side sectional view of the small electric appliance shown in FIG. 12 is a cross-sectional view taken along the line AA in FIG. FIG. 13 is a diagram including a partial cross-section schematically showing the configuration of the cleaning and purifying apparatus according to the third embodiment of the present invention. FIG. 14 is a side sectional view showing a small electric appliance according to the fourth embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that similar components are included in the following embodiments. Therefore, in the following, common reference numerals are given to those similar components, and redundant description is omitted.

(First embodiment)
The plasma generator 1 according to the present embodiment includes a substantially cylindrical case member 2. Note that the shape of the case member is not limited to a cylindrical shape, and may be, for example, a rectangular tube shape.

  As shown in FIG. 1, a ceramic member 3 is disposed inside the case member 2, and the internal space of the case member 2 is partitioned vertically by the ceramic member 3.

  In the present embodiment, the upper region of the ceramic member 3 in the internal space of the case member 2 is the liquid storage portion 4 that stores the liquid 17 (see FIGS. 3 and 4) containing water, and the lower side. The region is a gas containing portion 5 for containing gas.

  Thus, in this embodiment, the ceramic member 3 corresponds to a partition wall that separates the liquid container 4 and the gas container 5.

  A ring-shaped sealing material 6 that closes the gap between the case member 2 and the ceramic member 3 is attached to the outer peripheral end of the liquid storage portion 4, and the liquid 17 in the liquid storage portion 4 is connected to the case member 2. The gas containing portion 5 is prevented from leaking from the gap with the ceramic member 3.

In addition, a gas introduction port 9 is provided below the side wall 2b of the case member 2 so as to communicate the gas storage portion 5 with the outside. A pipe (gas introduction path) 10 is inserted into the gas introduction port 9. ing. And the gas accommodating part 5 and the gas supply part 11 are connected via the piping 10. FIG. In the present embodiment, a gas containing at least oxygen (O ₂ ) is supplied from the gas supply unit 11 into the gas storage unit 5.

  Further, a gas passage 3a is formed in the ceramic member 3, and the gas or the like introduced from the gas supply unit 11 into the gas storage unit 5 is sent out into the liquid storage unit 4 through the gas passage 3a. Become.

  Thus, the gas supply part 11 concerning this embodiment supplies the gas which contains oxygen at least to the gas accommodating part 5 by the aspect which pumps the gas of the gas accommodating part 5 to the liquid accommodating part 4 via the gas channel | path 3a. It has a function to do.

  In addition, the plasma generator 1 is separated from the first electrode 12 disposed in the gas storage unit 5 by a distance from the first electrode 12, and at least a portion on the side paired with the first electrode 12 (the first electrode 12). And a second electrode 13 disposed so that the surface of the liquid containing portion 4 is in contact with the liquid 17 in the liquid storage portion 4.

  Specifically, the doughnut-shaped first electrode 12 and the doughnut-shaped second electrode 13 are disposed in the gas storage unit 5 and the liquid storage unit 4, respectively.

  As shown in FIG. 1, the doughnut-shaped first electrode 12 is disposed on the surface 3 b of the ceramic member 3 on the gas accommodating portion 5 side so that the center is the gas passage 3 a. The surface of the first electrode 12 is covered with a dielectric (not shown).

  In addition, the second electrode 13 has at least a portion that is paired with the first electrode 12 (a surface that generates a discharge between the second electrode 13 and the surface of the first electrode 12) in contact with the liquid 17 in the liquid storage unit 4. Further, it is disposed in the liquid storage part 4. The second electrode 13 is also arranged so that the center is the gas passage 3a. That is, the first electrode 12 and the second electrode 13 are arranged concentrically.

  As described above, in the plasma generator 1 according to this embodiment, the first electrode 12 is introduced into the liquid storage unit 4 by arranging the doughnut-shaped first electrode 12 in the gas storage unit 5. To avoid contact.

  On the other hand, by disposing the doughnut-shaped second electrode 13 in the liquid storage portion 4, at least a portion of the second electrode 13 that is paired with the first electrode 12 (discharging between the surface of the first electrode 12 and the surface). The surface that causes the liquid to come into contact with the liquid 17 introduced into the liquid storage unit 4.

  The first electrode 12 and the second electrode 13 are electrically connected to the plasma power supply unit 15 (see FIG. 1) via lead wires 14, and the first electrode 12 and the second electrode 13 are connected to each other. A predetermined voltage is applied between them.

  In the present embodiment, a predetermined voltage is applied between the first electrode 12 and the second electrode 13 so that the first electrode 12 has a higher potential than the second electrode 13. Specifically, the first electrode 12 and the second electrode 13 are set so that the voltage value (absolute value of the voltage value) is lower than the voltage value (absolute value of the voltage value) applied to the first electrode 12. A predetermined voltage is applied between the second electrode 13 (see FIG. 2). Furthermore, in this embodiment, the voltage value (absolute value) applied to the second electrode 13 is set to a value in the vicinity of 0 V, so that the second electrode 13 is brought closer to the ground electrode.

  Here, in this embodiment, the gas passage 3a of the plasma generator 1 is provided with a refining means for refining bubbles generated when the gas is pumped to the liquid storage unit 4.

  Specifically, the gas passage 3 a is a fine hole having a hole diameter of about 1 μm to 10 μm, so that fine bubbles are pumped to the liquid storage unit 4. In addition, it is suppressed that the liquid 17 accommodated in the liquid storage part 4 leaks in the gas storage part 5 from the gas path 3a by making the hole diameter of the gas path 3a into about 1 micrometer-10 micrometers.

  Next, the operation of the above-described plasma generator 1 and the method for generating hydroxy radicals will be described.

  First, the gas containing oxygen is supplied to the gas accommodating part 5 in the aspect which pumps the gas of the gas accommodating part 5 to the liquid accommodating part 4 via the gas channel | path 3a (process to supply gas).

In the present embodiment, as shown in FIG. 1, a gas containing oxygen based on air (flow rate of about 0.01 L / min to 1.0 L / min (10 cc / min to 1000 cc / min)) is a gas supply unit. 11 is sent into the gas storage unit 5 through the pipe 10. At this time, the pressure for feeding the gas is set to about 0.0098 MPa to 0.49 MPa (0.1 kgf / cm ^{2 to 5} kgf / cm ² ).

  As described above, the gas supply unit 11 has a function of supplying gas (air) in the atmosphere. The gas supply flow rate is controlled by a flow rate control unit (not shown) provided in the gas supply unit 11. In addition, the gas supply unit 11 has a function of supplying not only atmospheric gases but also other types of gases (for example, gases having different oxygen concentrations), and a gas type control unit is provided to provide various types of gases. Among them, one kind or plural kinds of gases may be selectively supplied.

And by supplying gas to the gas accommodating part 5, the pressure of the gas accommodating part 5 adds this pressure to atmospheric pressure, and is about 0.11MPa-0.59MPa (1.1kgf / cm < ² > -6kgf / cm) ² ) About a positive pressure state. Thus, by making the gas storage part 5 into a positive pressure, a gas flow from the gas storage part 5 to the liquid storage part 4 through the gas passage 3a is formed. In addition, it is suppressed that the liquid 17 accommodated in the liquid accommodating part 4 leaks in the gas accommodating part 5 from the gas path 3a also by making the gas accommodating part 5 into a positive pressure.

  And by supplying the gas containing oxygen as mentioned above, as shown in FIG. 3, the fine bubble containing oxygen in the opening end 3c by the side of the liquid accommodating part 4 (upper side of FIG. 1) of the gas passage 3a. 16 grows (the process of growing bubbles).

  Next, the plasma power supply unit 15 applies a predetermined voltage to the first electrode 12 and the second electrode 13, and a voltage value (absolute value of the voltage value) applied to the second electrode 13 is a voltage value applied to the first electrode 12. It is applied so as to be lower than (absolute value of voltage value). The voltage to be applied is preferably a voltage (power: about 10 W to about 100 W) that enables glow discharge under atmospheric pressure. At this time, it is preferable to provide a voltage control unit in the plasma power supply unit 15 to control the voltage applied between the first electrode 12 and the second electrode 13.

  Then, by applying a predetermined voltage to the first electrode 12 and the second electrode 13, a gas atmosphere having an atmospheric pressure or higher pressure is provided between the first electrode 12 and the second electrode 13. A discharge occurs. The technique for generating plasma under atmospheric pressure is reported in, for example, Document A (Sachiko Okazaki, “Atmospheric pressure glow discharge plasma and its application”, review lecture: 20th JSPF Annual Meeting).

  Then, this discharge (discharge between the surface of the first electrode 12 in contact with the gas and the surface of the second electrode 13 in contact with the liquid) generates plasma in the gas region in the liquid 17 of the liquid container 4. Then, ozone, hydroxy radicals, and the like are generated by water contained in the liquid and oxygen contained in the gas (step of producing hydroxy radicals).

  In the present embodiment, plasma is generated by generating a potential difference in the gas in the bubble 16 (the gas in the vicinity of the gas-liquid interface in the liquid 17 of the liquid container 4). As described above, by generating a potential difference in the vicinity of the gas-liquid boundary surface where hydroxy radicals are easily generated (near the open end 3c facing the liquid 17 in the gas passage 3a), it is possible to generate more ozone, hydroxy radicals, and the like. become. In the present embodiment, ozone, hydroxy radicals, and the like can be generated not only in the bubbles 16 near the opening end 3 c facing the liquid 17 in the gas passage 3 a but also in the bubbles 16 sent out to the liquid storage unit 4.

  The ozone, hydroxy radicals, and the like generated in this way are sent out to the liquid storage unit 4 along with the gas flow described above.

  The bubbles 16 are also refined and discharged into the liquid 17 by shearing the bubbles 16 containing hydroxy radicals and the like from the ceramic member (partition wall portion) 3 by the flow of the liquid 17 in the liquid storage unit 4. (Bubble release process).

  That is, in the liquid container 4 where the bubbles 16 grow, the flow of the liquid 17 (see the arrow 18 in FIGS. 3 and 4) is generated by the introduction of the liquid 17, and the liquid 17 flowing in the direction of the arrow 18 grows. When the bubble 16 hits, the flow of the liquid 17 acts as a shearing force on the bubble 16, and the bubble 16 is released into the liquid 17 from the opening end 3 c. In the present embodiment, since the gas passage 3a is a fine hole having a hole diameter of about 1 μm to 10 μm, even if the liquid 17 does not flow, bubbles that are released into the liquid 17 from the opening end 3c. 16 can be fine.

  In this way, by refining bubbles by means of refining, the surface area per unit volume of bubbles is increased, and the amount of ozone, hydroxy radicals, etc. generated at the gas-liquid interface can be increased, Large amounts of ozone, hydroxy radicals, etc. can be generated more stably.

  The fine bubbles 16 released into the liquid 17 are diffused to every corner of the liquid 17 without being immediately released into the atmosphere. A part of the diffused fine bubbles 16 is easily dissolved in the liquid 17. At this time, ozone or the like contained in the bubbles 16 is dissolved in the liquid 17, so that the ozone concentration of the liquid rises at a stretch.

  According to Document B (Masayoshi Takahashi, “Improvement of water environment by microbubbles and nanobubbles”, Aquanet, 2004.6), fine bubbles 16 containing ozone and various radicals are usually negatively charged. It has been reported that there are many cases. Therefore, the other part of the bubbles 16 is easily adsorbed by organic substances, oils and fats, dyes, proteins, bacteria, etc. (not shown) contained in the liquid 17. The organic matter or the like in the liquid 17 is decomposed by ozone or various radicals dissolved in the liquid 17 or ozone or various radicals contained in the bubbles 16 adsorbed on the organic matter.

  For example, a hydroxy radical or the like has a relatively large energy of about 120 kcal / mol. This energy is a double bond between a nitrogen atom and a nitrogen atom (N = N), a double bond between a carbon atom and a carbon atom (C = C), or a double bond between a carbon atom and a nitrogen atom (C = N). ) And the like (above 100 kcal / mol). Therefore, an organic substance composed of a bond such as nitrogen or carbon is easily broken and decomposed by this hydroxy radical or the like. Since ozone, hydroxy radicals, and the like that contribute to the decomposition of such organic substances do not have persistence like chlorine and disappear with time, they are also environmentally friendly substances.

  As described above, in the plasma generator 1 according to the present embodiment, the first electrode 12 is disposed in the gas storage unit 5, and the second electrode 13 is at least a portion on the side that is paired with the first electrode 12. (The surface that generates a discharge between the first electrode 12 and the surface of the first electrode 12) is disposed so as to contact the liquid in the liquid storage unit 4.

  Then, by generating a discharge between the surface of the first electrode 12 in contact with the gas and the surface of the second electrode 13 in contact with the liquid, plasma is generated in the gas region in the liquid 17 in the liquid container 4. Hydroxyl radicals are generated from water contained in the liquid 17 and oxygen contained in the gas.

  According to such a configuration, since the discharge can be generated between the first electrode 12 and the second electrode 13 without being greatly affected by the electrical resistance of the liquid 17, the gas is more reliably converted into plasma. Therefore, a large amount of ozone, radicals, etc. can be generated more stably.

  Further, in the present embodiment, the bubbles are made finer by the miniaturization means (in this embodiment, the hole diameter of the gas passage 3a is reduced). Therefore, the surface area per unit volume of bubbles is increased, the amount of ozone and hydroxy radicals generated at the gas-liquid boundary surface can be increased, and a large amount of ozone and hydroxy radicals are generated more stably. Will be able to.

  Further, according to the present embodiment, the liquid 17 is introduced into the liquid container 4, and the first electrode 12 that generates plasma is disposed in the gas container 5 defined by the ceramic member 3. Therefore, the first electrode 12 does not contact the liquid 17 at all and is not affected by the electric resistance of the liquid 17. As a result, a discharge can be stably generated between the first electrode 12 and the second electrode 13, and the gas containing oxygen introduced into the gas storage unit 5 is reliably turned into plasma, and water and oxygen From this, ozone or hydroxy radicals can be generated stably.

  In addition, according to the present embodiment, by introducing a gas containing oxygen into the gas storage unit 5, the gas storage unit 5 is brought to a positive pressure, and the gas flowing from the gas storage unit 5 to the liquid storage unit 4 through the gas passage 3 a. Forming a flow. Then, ozone, hydroxy radicals, and the like are generated in the bubbles 16 that grow on the opening end 3c facing the liquid 17 in the gas passage 3a by riding on the gas flow.

  That is, in the present embodiment, ozone, hydroxy radicals, and the like are generated in the gas in the bubbles 16 (the gas in the vicinity of the gas-liquid interface in the liquid 17 of the liquid container 4). A gas containing ozone, hydroxy radicals, or the like is diffused into the liquid 17 as fine bubbles 16. Thereby, after ozone and various radicals are generated, the ozone and various radicals can be efficiently fed into the liquid 17 in a very short time before they disappear.

  Then, the fine bubbles 16 containing ozone and various radicals diffuse into the liquid 17, so that the ozone concentration of the liquid 17 is increased and the bubbles 16 are adsorbed to the organic matter contained in the liquid 17. Thereby, organic matter, bacteria, and the like can be efficiently decomposed by ozone dissolved in the liquid 17 and various radicals contained in the adsorbed bubbles 16.

  Further, by using the doughnut-shaped first electrode 12 and the second electrode 13 as the electrodes for generating plasma, the size of the main body portion of the plasma generator 1 excluding the plasma power supply unit 15 and the gas supply unit 11 can be made compact. can do. As a result, it can be easily incorporated into an existing apparatus. In addition, even when a new device is mounted, the occupied space can be minimized.

  If the plasma power supply unit 15 includes a voltage control unit that controls the voltage applied between the first electrode 12 and the second electrode 13, the liquid 17 is interposed between the first electrode 12 and the second electrode 13. The discharge can be stably generated regardless of the fluctuation of the electrical resistance. At this time, the voltage controller applies the first voltage value (absolute value of the voltage value) to be lower than the voltage value (absolute value of the voltage value) applied to the first electrode 12. If a voltage is applied between the electrode 12 and the second electrode 13, even if the user accidentally touches the liquid 17 or the second electrode 13 by any chance, the user Etc. can be prevented from being electrocuted.

  In particular, the voltage applied to the second electrode 13 is set to a value in the vicinity of zero V, that is, the electric shock of the user or the like is further suppressed by making the second electrode 13 approach the ground electrode. Can do.

  Further, if the gas supply unit 11 has a gas type control unit that controls the type of gas, it is possible to adjust the generation amount of ozone, hydroxy radicals, and the like.

  At this time, if the gas supply unit 11 has a function of supplying air in the atmosphere, the gas can be supplied more easily.

  Moreover, if the gas supply flow rate is controlled by the flow rate control unit, plasma can be generated more stably.

  Next, a modified example of the plasma generator will be described.

(First modification)
A plasma generator 1A according to this modification basically has the same configuration as the plasma generator 1 according to the first embodiment. That is, the plasma generating apparatus 1 </ b> A includes a case member 2, and the space of the case member 2 is partitioned vertically by a ceramic member (partition wall portion) 3 disposed inside the case member 2.

  And the area | region of the upper side of the ceramic member 3 among the internal space of the case member 2 becomes the liquid storage part 4 which accommodates the liquid 17 containing water, and the gas storage part 5 in which a lower area | region accommodates gas. It has become.

  Here, the plasma generator 1A according to this modification mainly differs from the plasma generator 1 of the first embodiment in that the partition wall 3 is made of a porous material as shown in FIG. This is because there is provided a means for making them.

  By forming the gas passage portion with a porous material, the generated bubbles are miniaturized.

  Also according to the above modification, the same operations and effects as those of the first embodiment can be obtained.

(Second modification)
The plasma generator 1B according to this modification basically has the same configuration as the plasma generator 1 according to the first embodiment. That is, the plasma generating apparatus 1B includes a case member 2, and the space of the case member 2 is partitioned vertically by a ceramic member (partition wall portion) 3 disposed inside the case member 2.

  And the area | region of the upper side of the ceramic member 3 among the internal space of the case member 2 becomes the liquid storage part 4 which accommodates the liquid 17 containing water, and the gas storage part 5 in which a lower area | region accommodates gas. It has become.

  Here, the main difference between the plasma generator 1B according to this modification and the plasma generator 1 of the first embodiment is that, as shown in FIG. 6, turbulent flow generation means is formed in the gas passage 3a. This is because a miniaturization means is provided.

  For example, the turbulent flow generating means can be formed by making the inside of the gas passage 3a uneven or corrugated. By generating a turbulent flow in the gas passage 3a, a shearing force is applied to the bubbles, and the generated bubbles are refined.

  Also according to the above modification, the same operations and effects as those of the first embodiment can be obtained.

(Third Modification)
The plasma generator 1C according to this modification basically has the same configuration as the plasma generator 1 according to the first embodiment. That is, the plasma generating apparatus 1 </ b> C includes a case member 2, and the space of the case member 2 is vertically divided by a ceramic member (partition wall portion) 3 disposed inside the case member 2.

  And the area | region of the upper side of the ceramic member 3 among the internal space of the case member 2 becomes the liquid storage part 4 which accommodates the liquid 17 containing water, and the gas storage part 5 in which a lower area | region accommodates gas. It has become.

  Here, the plasma generator 1C according to the present modification is mainly different from the plasma generator 1 of the first embodiment, as shown in FIG. 7, by making the opening area of the gas passage 3a variable. This is because there is provided a means for making them.

  As a structure for making the opening area of the gas passage 3a variable, the following slide structure can be adopted. That is, a movable partition 81 having a notch, a movable rail 82 for running the movable partition 81, and a partition delivery mechanism 83 that sends out the movable partition 81 are provided. When the opening area of the gas passage 3a is increased, the movable partition wall 81 is returned as shown in FIG. In this state, as shown in the plan view of FIG. 8A, the notch formed in the movable partition wall 81 is a large opening 84. On the other hand, when reducing the opening area of the gas passage 3a, the movable partition wall 81 is pulled out as shown in FIG. 7B. In this state, as shown in the plan view of FIG. 8B, the cutouts formed in the movable partition wall 81 overlap to form a small opening 84.

  In the present embodiment, the flow velocity of the liquid 17 in the liquid storage unit 4 is sensed using the velocimeter 85, and the opening area of the gas passage 3a is changed based on the flow velocity. That is, when the flow rate is small, the shearing force by the liquid 17 is small, so if the amount of gas is large, fine bubbles are not formed. Therefore, when the flow velocity is small, as shown in FIG. 7A, the opening area of the gas passage 3a is reduced to limit the amount of gas. On the other hand, when the flow rate is large, the shearing force by the liquid 17 is large, so fine bubbles are formed even if the amount of gas is large. Therefore, when the flow velocity is large, as shown in FIG. 7B, the opening area of the gas passage 3a is increased and a large amount of gas is introduced. Thereby, the amount of radicals generated per unit time can be increased. Thus, the fine bubbles can be optimally controlled by feedback controlling the opening area of the gas passage 3a in accordance with the flow velocity.

  Also according to the above modification, the same operations and effects as those of the first embodiment can be obtained. Here, the opening area of the gas passage 3a is changed according to the flow velocity, but the opening area of the gas passage 3a may be simply varied regardless of the flow velocity.

(Fourth modification)
The plasma generator 1D according to this modification has basically the same configuration as the plasma generator 1 according to the first embodiment. That is, the plasma generator 1D includes a case member 2, and the space of the case member 2 is partitioned vertically by a ceramic member (partition wall) 3 disposed inside the case member 2.

  And the area | region of the upper side of the ceramic member 3 among the internal space of the case member 2 becomes the liquid storage part 4 which accommodates the liquid 17 containing water, and the gas storage part 5 in which a lower area | region accommodates gas. It has become.

  Here, the plasma generator 1D according to this modification mainly differs from the plasma generator 1 of the first embodiment in that a transverse vibration mechanism (in which a partition wall 3 is vibrated in a lateral direction as shown in FIG. 9) A miniaturization means). Such lateral vibration can be realized by providing a vibration motor on the gas side of the partition wall 3, for example. By vibrating the partition wall portion 3 in the lateral direction, shearing force is applied to the bubbles, and the generated bubbles are refined.

  Also according to the above modification, the same operations and effects as those of the first embodiment can be obtained. Although the partition wall portion 3 is vibrated in the lateral direction here, the direction in which the partition wall portion 3 is vibrated is not necessarily horizontal.

(Second Embodiment)
In this embodiment, an example of a small electric appliance using the plasma generator 1 will be described with reference to FIGS. Below, the washing | cleaning purification apparatus which wash | cleans the head part of the electric razor as a hair removal apparatus is illustrated.

  A cleaning and purifying device 40 as a small electric appliance shown in FIGS. 10 to 12 cleans a head portion (a portion to be cleaned) 51 of an electric shaver 50 which is a kind of hair removal device.

  As shown in FIGS. 10 to 12, the cleaning and purifying apparatus 40 includes a housing 41 having an opening 41 a for inserting an electric razor 50 with the head portion 51 facing downward, and a head portion 51 inserted through the opening 41 a. Receiving tray 42.

  In addition, the cleaning and purifying device 40 includes a tank 43 that stores liquid, an overflow portion 44 that communicates with the receiving tray 42, and a pump 45 that circulates and supplies the liquid in the tank 43 to the liquid inlet 7. Furthermore, a cartridge 46 having a filter 46a for filtering the liquid, an on-off valve 47 for controlling the airtight state in the tank 43, and a circulation path for circulating the liquid are provided.

  This circulation path includes a pipe (liquid introduction path) 21 for receiving the liquid stored in the tank 43 into the tray 42, a path 23 (discharge path) for guiding the liquid discharged from the tray 42 to the cartridge 46, and the overflow portion 44. A path 24 for guiding the liquid discharged from the cartridge 46 to the cartridge 46, a path 25 for guiding the liquid discharged from the cartridge 46 to the pump 45, and a path 26 for guiding the liquid discharged from the pump 45 to the tank 43. Yes. In addition, an on-off valve 47 is connected to the tank 43 via an airtight path 27. Hereinafter, each component will be described.

  The housing 41 has a stand portion 41b that abuts the grip portion 52 of the electric razor 50 at the rear portion thereof, and holds the electric razor 50 inserted from the opening 41a together with the receiving tray 42. As shown in FIG. 10, a contact member 41c for detecting that the electric shaver 50 is attached to the cleaning and purifying device 40 is provided on the front surface of the stand portion 41b. The contact member 41c detects attachment of the electric razor 50 by contact with a terminal 52a provided on the back surface of the grip portion 52. In addition to such a detection function, the electric razor 50 has various control signals and driving power. The function to output is given.

  A fan 48 for drying the head portion 51 after cleaning is accommodated above the front portion of the housing 41. On the front surface of the housing 41, there are provided a ventilation window 41d for the fan 48, an operation button 41e for executing a cleaning operation, a lamp 41f for displaying an operation state, and the like. The rear surface side of the housing 41 is a mounting portion for mounting the tank 43, and has connection ports 41 g, 41 h, 41 i connected to the ports 43 a, 43 b, 43 c of the tank 43. The connection port 41g is connected to the pipe (liquid introduction path) 21, the connection port 41h is connected to the path 26, and the connection port 41i is connected to the airtight path 27.

  The saucer 42 has a concave shape that follows the shape of the head portion 51, and a through hole 42 b is formed in the bottom wall portion. And the plasma generator 1 is provided in the back side of the bottom wall part so that the liquid storage part 4 may connect with the internal space of the receiving tray 42 through the said through-hole 42b.

  In the present embodiment, the plasma generator 1 is provided so that the liquid storage unit 4 communicates with the internal space of the tray 42, and the internal space of the tray 42 also functions as the liquid storage unit 4 of the plasma generator 1. Yes. It is preferable to form a drainage groove or the like in the tray 42 so that the liquid inside the liquid storage unit 4 can be discharged more smoothly from the path 23 (discharge path).

  A heater 49 is provided on the back side of the bottom wall of the tray 42 (see FIG. 12). The heater 49 is used to dry the head unit 51 in conjunction with the fan 48.

  An overflow portion 44 is provided in front of the tray 42. In the present embodiment, the tray 42 and the overflow portion 44 are integrally formed. The inlet of the overflow part 44 is connected to the tray 42 and the outlet is connected to the path 24. The path 24 reaches from the outlet of the overflow part 44 to the cartridge 46 via the relay port 42a provided at the rear part of the tray 42.

  The tank 43 has a discharge port 43a, an inflow port 43b, and a vent port 43c for opening an airtight state on the front surface, and liquid discharge from the discharge port 43a is controlled by opening and closing the vent port 43c. . The tank 43 is detachably provided on the rear surface side of the casing 41. When the tank 43 is attached to the casing 41, the discharge port 43a is connected to the connecting port 41g, and the liquid stored in the tank 43 is connected to the pipe (liquid introduction path) 21. Can be introduced into the receiving tray 42. In addition, the inlet 43b is connected to the connection port 41h and connected to the delivery port 45a of the pump 45 by the path 26, and the ventilation port 43c is connected to the connection port 41i and connected to the on-off valve 47 by the airtight path 27. .

  The cartridge 46 is a substantially box-shaped body in which the filter 46a is housed, and has an inlet 46b at the top and an outlet 46c at the front. The cartridge 46 is detachably provided on the lower rear side of the housing 41. In the attachment body to the housing 41, the inflow port 46b is connected to the discharge port 41k by the route 23 (discharge passage). 24 is connected to the outlet of the overflow portion 44. The outflow port 46 c is connected to the suction port 45 b of the pump 45 through the path 25.

  Next, the operation of the cleaning and purifying device 40 will be described.

  First, the liquid is introduced from the tank 43 into the tray 42 and the liquid storage part 4 of the plasma generator 1 through the pipe (liquid introduction path) 21.

  Then, a gas having a predetermined flow rate containing oxygen based on air is sent from the gas supply unit 11 into the gas storage unit 5 through the pipe (gas introduction path) 10, and the gas storage unit 5 is brought into a positive pressure state. Thus, a gas flow is formed from the gas accommodating part 5 to the liquid accommodating part 4 through the gas passage 3a.

  Next, a predetermined voltage is applied to the first electrode 12 and the second electrode 13, and a voltage value (absolute value of the voltage value) applied to the second electrode 13 is a voltage value (absolute value of the voltage value) applied to the first electrode 12. ), The discharge is generated between the first electrode 12 and the second electrode 13. By this discharge (discharge between the surface of the first electrode 12 in contact with the gas and the surface of the second electrode 13 in contact with the liquid), plasma is generated in the gas region in the liquid 17 of the liquid storage unit 4, Ozone, hydroxy radicals, and the like are generated by oxygen contained in water and gas contained in the liquid 17 (see FIG. 4).

  And the produced | generated ozone and various radicals will be sent out in the liquid stored in the liquid storage part 4 and the receiving tray 42 with the flow of the gas mentioned above. At this time, the growing bubbles are released from the opening end 3c into the liquid as bubbles 16 refined by the miniaturization means, and the fine bubbles 16 released into the liquid diffuse to every corner of the liquid. That is, the generated cleaning liquid is supplied to the head unit 51 serving as the cleaning target unit 30. The organic matter or the like attached to the head portion 51 can be efficiently decomposed by ozone or radicals dissolved in the liquid (cleaning liquid), ozone or radicals contained in the bubbles 16, and the like.

  As described above, in the present embodiment, the cleaning and purifying device (small electric appliance) 40 is provided with the plasma generator 1 that makes the bubbles fine by the refining means. A small electric device that can be generated more stably can be obtained. And the cleaning power of the washing | cleaning purification apparatus (small electric appliance) 40 can be improved by enabling it to produce | generate a lot of ozone, a hydroxyl radical, etc. more stably.

  Note that the first electrode 12 and the second electrode are set so that the voltage value applied to the second electrode 13 (the absolute value of the voltage value) is lower than the voltage value applied to the first electrode 12 (the absolute value of the voltage value). If a voltage is applied between the first and second electrodes 13, even if the user accidentally touches the liquid 17 or the second electrode 13, the user or the like may be electrocuted. Can be suppressed.

  This is particularly effective when the second electrode 13 is arranged so as to be exposed to the outside as in the present embodiment.

  Also, the present embodiment can be applied to the plasma generators 1A to 1D.

(Third embodiment)
In the present embodiment, an example of a cleaning and purifying apparatus using a plasma generator will be described.

  As shown in FIG. 13, the cleaning and purifying apparatus 20 according to the present embodiment includes a plasma generator 1E.

  The plasma generator 1E basically has the same configuration as the plasma generator 1 according to the first embodiment. That is, the plasma generating apparatus 1E includes a case member 2, and the space of the case member 2 is vertically divided by a ceramic member (partition wall portion) 3 disposed inside the case member 2.

  And the area | region of the upper side of the ceramic member 3 among the internal space of the case member 2 becomes the liquid storage part 4 which accommodates the liquid 17 containing water, and the gas storage part 5 in which a lower area | region accommodates gas. It has become.

  A ring-shaped sealing material 6 that closes the gap between the case member 2 and the ceramic member 3 is attached to the outer peripheral end of the liquid storage portion 4, and the liquid 17 in the liquid storage portion 4 is connected to the case member 2. The gas containing portion 5 is prevented from leaking from the gap with the ceramic member 3.

  The plasma generating apparatus 1E according to the present embodiment is provided with a liquid introduction port 7 for introducing the liquid 17 into the liquid storage unit 4 in the top wall (the liquid storage unit 4 side wall) 2a of the case member 2, and The plasma generator 1 according to the first embodiment is mainly different from the plasma generator 1 according to the first embodiment in that a liquid discharge port 8 for sending the liquid 17 introduced into the liquid storage unit 4 to the outside is provided.

  In the cleaning and purifying apparatus 20 according to this embodiment, the liquid 17 that has been processed from the cleaning target portion 30 is introduced into the liquid storage portion 4 into the liquid inlet 7 of the case member 2 that stores the ceramic member 3. A pipe (liquid introduction path) 21 is connected. The liquid discharge port 8 is connected to a pipe (liquid discharge path) 22 for sending the liquid in the liquid storage unit 4 to the target portion 30 to be cleaned.

  Next, operation | movement of the washing | cleaning purification apparatus 20 mentioned above is demonstrated.

  First, as shown in FIG. 13, a predetermined flow rate gas containing oxygen based on air is sent from the gas supply unit 11 into the gas storage unit 5 through a pipe (gas introduction path) 10. And the gas accommodating part 5 is made into a positive pressure state, and the flow of the gas which goes to the liquid accommodating part 4 through the gas channel | path 3a from the gas accommodating part 5 is formed.

  At this time, the liquid 17 that has been processed from the cleaning target portion 30 is introduced into the liquid storage unit 4 from the pipe (liquid introduction path) 21 through the liquid introduction port 7.

  Next, a predetermined voltage is applied to the first electrode 12 and the second electrode 13, and a voltage value (absolute value of the voltage value) applied to the second electrode 13 is a voltage value (absolute value of the voltage value) applied to the first electrode 12. ), The discharge is generated between the first electrode 12 and the second electrode 13. By this discharge (discharge between the surface of the first electrode 12 in contact with the gas and the surface of the second electrode 13 in contact with the liquid), plasma is generated in the gas region in the liquid 17 of the liquid storage unit 4, Ozone, hydroxy radicals, and the like are generated by oxygen contained in water and gas contained in the liquid 17 (see FIG. 4).

  And the produced | generated ozone and various radicals will be sent out to the liquid storage part 4 with the flow of the gas mentioned above. At this time, the growing bubbles are refined by shearing due to the refinement means or the flow of the liquid 17 and are released as fine bubbles 16 from the open end 3 c into the liquid.

  The fine bubbles 16 released in the liquid diffuse to every corner of the liquid. At this time, a part of the diffused fine bubbles 16 is easily dissolved in the liquid 17 together with ozone, hydroxy radicals, etc. contained in the bubbles 16 and the ozone concentration is increased. Also, some of the bubbles 16 are easily adsorbed by organic substances or the like contained in the liquid 17 in a state containing ozone, hydroxy radicals, or the like. Further, fine organic substances are adsorbed on a part of the bubbles 16.

  Thus, the organic matter or the like in the liquid 17 is efficiently decomposed by ozone or radicals dissolved in the liquid 17 or ozone or radicals contained in the bubbles 16 adsorbed on the organic matter or the like. Then, the liquid 17 that is decomposed and purified by the organic matter or the like is returned from the liquid discharge port 8 to the cleaning target part 30 via the pipe (liquid discharge path) 22 and is used again.

  In addition, although the thing of the usage mode (usage mode A) which wash | cleans and purifies the liquid 17 in the case member 2 was illustrated as the washing | cleaning purification apparatus 20 in the above, other than this, for example, it showed in the said 2nd Embodiment. As described above, a usage mode (usage mode B) is also possible in which the liquid 17 in which fine bubbles are diffused is supplied as a cleaning liquid to a predetermined apparatus.

  In this case, the cleaning and purifying apparatus 20 operates as follows.

  First, fine bubbles 16 containing ozone and hydroxy radicals are diffused in the liquid 17 introduced into the case member 2, and ozone and radicals contained in the fine bubbles 16 are dissolved. At this time, fine organic substances are adsorbed to a part of the bubbles 16.

  Next, the liquid 17 is supplied to the cleaning target portion 30 as a cleaning liquid. In the portion to be cleaned 30, the organic matter is efficiently decomposed by ozone or radicals dissolved in the liquid 17 or ozone or radicals contained in the bubbles 16 adsorbed on the organic matter.

  In addition, when using a washing | cleaning purification apparatus as the usage condition A, it is possible to apply this washing | cleaning purification apparatus to purification | cleaning of various liquids, such as hot water accumulated in the bathtub, rain water, sewage, sewage, for example. When used as usage mode B, for example, it can be used as a cleaning liquid in water used for various home appliances such as washing machines and dishwashers, health home appliances such as a mouth washer, and sanitary equipment such as a toilet. In addition to home appliances and the like, it can be widely applied to industries such as washing of food and washing in the manufacturing process of industrial products.

  As described above, in the present embodiment, since the cleaning and purifying apparatus 20 includes the plasma generator 1E that refines bubbles by the refinement means, a large amount of ozone, hydroxy radicals, and the like are generated more stably. It is possible to obtain the cleaning and purifying device 20 that can perform the above operation. And the washing | cleaning power of the washing | cleaning purification apparatus 20 can be improved by enabling it to produce | generate a lot of ozone, a hydroxyl radical, etc. more stably.

  Note that this embodiment can also be applied to the plasma generators 1A to 1D.

(Fourth embodiment)
In the present embodiment, an example of a small electric appliance using the plasma generator 1E will be described with reference to FIG. Below, the washing | cleaning purification apparatus which wash | cleans the head part of the electric razor as a hair removal apparatus is illustrated.

  A cleaning and purifying device 40F as a small electric appliance shown in FIG. 14 cleans the head portion 51 of an electric shaver 50 which is a kind of hair removal device. That is, the cleaning and purifying device 40F is a cleaning and purifying device used as the use mode B described above. In this case, the head portion 51 of the electric razor 50 corresponds to the cleaning target portion 30.

  The cleaning and purifying device 40F has substantially the same configuration as the cleaning and purifying device 40 of the second embodiment, and a housing 41 having an opening 41a for inserting an electric razor 50 with the head portion 51 facing downward. And a receiving tray 42 for receiving the head portion 51 inserted through the opening 41a (see FIG. 14).

  The cleaning and purifying device 40F includes a tank 43 that stores liquid, an overflow portion 44 that communicates with the receiving tray 42, and a pump 45 that circulates and supplies the liquid in the tank 43 to the liquid inlet 7. Furthermore, a cartridge 46 having a filter 46a for filtering the liquid, an on-off valve 47 for controlling the airtight state in the tank 43, and a circulation path for circulating the liquid are provided.

  This circulation path includes a pipe (liquid introduction path) 21 that guides the liquid stored in the tank 43 to the liquid inlet 7, and a pipe (liquid outlet path) 22 that guides the liquid discharged from the liquid outlet 8 to the tray 42. The path 23 (discharge path) for guiding the liquid discharged from the tray 42 to the cartridge 46, the path 24 for guiding the liquid discharged from the overflow portion 44 to the cartridge 46, and the liquid discharged from the cartridge 46 to the pump 45 A path 25 and a path 26 that guides the liquid delivered from the pump 45 to the tank 43 are configured.

  The tray 42 has a concave shape that follows the shape of the head portion 51, and a plasma generator 1E is provided on the back side of the bottom wall portion. In addition, you may make it provide the position adjustment part which adjusts the position of the plasma generator 1E in the washing | cleaning purification apparatus 40F. For example, an arm portion is provided on the back side of the bottom wall portion, and the plasma generating device 1E is swingably attached by the arm portion so that the plasma adjusting device 1E can be adjusted horizontally by the position adjusting portion. Is possible. In this way, the plasma generator 1E can be always placed horizontally, and plasma can be generated more stably.

  The plasma generator 1E has a liquid inlet 7 connected to a pipe (liquid inlet path) 21 and a liquid outlet 8 connected to a pipe (liquid outlet path) 22. In addition, a supply port 41 j connected to the pipe (liquid discharge path) 22 and a discharge port 41 k connected to the path 23 are provided on the bottom wall portion of the tray 42.

  An overflow portion 44 is provided in front of the tray 42. In the present embodiment, the tray 42 and the overflow portion 44 are integrally formed. The inlet of the overflow part 44 is connected to the tray 42 and the outlet is connected to the path 24. The path 24 reaches from the outlet of the overflow part 44 to the cartridge 46 via the relay port 42a provided at the rear part of the tray 42.

  The tank 43 has a discharge port 43a, an inflow port 43b, and a vent port 43c for opening an airtight state on the front surface, and liquid discharge from the discharge port 43a is controlled by opening and closing the vent port 43c. . The tank 43 is detachably provided on the rear surface side of the casing 41. When the tank 43 is attached to the casing 41, the discharge port 43a is connected to the connecting port 41g and the liquid of the plasma generator 1 is connected by the pipe (liquid introduction path) 21. Connected to the inlet 7, the inlet 43 b is connected to the connecting port 41 h and connected to the delivery port 45 a of the pump 45 through the path 26, and the vent 43 c is connected to the connecting port 41 i and connected to the on-off valve 47 through the airtight path 27. It is connected.

  With this configuration, the cleaning liquid generated by diffusing fine bubbles 16 containing ozone, hydroxy radicals, etc. into the liquid introduced from the tank 43 to the plasma generator 1E is supplied into the tray 42 from the supply port 41j. Will be supplied. That is, the generated cleaning liquid is supplied to the head unit 51 serving as the cleaning target unit 30. The organic matter or the like attached to the head portion 51 can be efficiently decomposed by ozone or radicals dissolved in the liquid (cleaning liquid), ozone or radicals contained in the bubbles 16, and the like.

  As described above, in the present embodiment, the cleaning and purifying apparatus (small electric appliance) 40F is provided with the plasma generator 1E that refines the bubbles by the refining means. A small electric device that can be stably generated can be obtained. Further, by making it possible to generate a large amount of ozone, hydroxy radicals, and the like more stably, it is possible to improve the cleaning power of the cleaning and purifying device (small electric appliance) 40F.

  In addition, if the position adjustment part which adjusts the position of the plasma generator 1E is provided in the washing | cleaning purification apparatus (small electric appliance) 40F, it will become possible to stabilize plasma more.

  Further, the shape of the case member 2 can be the shape of the plasma generator 1E, and a cleaning and purifying device (small electric appliance) using the plasma generator having the configuration of the plasma generators 1A to 1D can be used.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in each of the above embodiments, the ceramic member is exemplified as the partition wall portion in which the gas passage is formed. However, the material of the partition wall portion is not limited to the ceramic member. For example, an appropriate member such as a glass plate that partitions gas and liquid is used, and a member having fine pores with a pore diameter of about 1 μm to 10 μm formed by photolithography and etching is used. Is possible. At this time, a plurality of gas passages may be provided.

  In addition, the cleaning and purifying device and the small electric appliance are not limited to those shown in the above embodiment. For example, the cleaning and purifying device for the electric toothbrush, the water purifying device, and the device for purifying the water containing the detergent before the drainage are used. The invention can be applied.

  In addition, the specifications (shape, size, layout, etc.) of the liquid storage unit, the gas storage unit, and other details can be changed as appropriate.

1, 1A, 1B, 1C, 1D, 1E Plasma generator 3 Ceramic member (partition wall)
3a Gas passage (miniaturization means)
4 Liquid storage part 5 Gas storage part 10 Piping (gas introduction path)
DESCRIPTION OF SYMBOLS 11 Gas supply part 12 1st electrode 13 2nd electrode 15 Plasma power supply part 20 ... Cleaning and purifying apparatus 40, 40F Cleaning and purifying apparatus (small electric appliance)

Claims (9)

A liquid container for containing a liquid containing water;
A gas container for containing gas;
A gas passage that guides the gas in the gas storage part to the liquid storage part is formed, and a partition part that separates the liquid storage part and the gas storage part;
A first electrode disposed in the gas accommodating portion;
A second electrode disposed at a distance from the first electrode and disposed so that at least a portion of the first electrode that is paired with the first electrode is in contact with the liquid in the liquid container;
In a mode in which the gas in the gas container is pumped to the liquid container through the gas passage, a gas supply unit that supplies a gas containing oxygen to the gas container,
By applying a predetermined voltage between the first electrode and the second electrode to generate a discharge between the first electrode and the second electrode, the gas introduced into the gas accommodating portion is changed. A plasma generating device comprising a plasma power supply unit for converting into plasma,
A plasma generating apparatus characterized in that a miniaturizing means for miniaturizing bubbles is provided in the gas passage.   The plasma generating apparatus according to claim 1, wherein the gas refining means is provided by forming the gas passage as a fine hole.   The plasma generating apparatus according to claim 1 or 2, wherein the finer means is provided by forming the partition wall portion with a porous material.   The plasma generation apparatus according to any one of claims 1 to 3, wherein the miniaturization means is turbulent flow generation means formed in the gas passage.   The plasma generating apparatus according to any one of claims 1 to 4, wherein the miniaturization means makes the opening area of the gas passage variable.   The plasma generating apparatus according to claim 5, wherein an opening area of the gas passage is changed based on a flow rate of the liquid in the liquid storage portion.   The plasma generator according to any one of claims 1 to 6, further comprising a lateral vibration mechanism that vibrates the partition wall in a lateral direction.   A cleaning and purifying apparatus comprising the plasma generator according to any one of claims 1 to 7.   A small electric appliance comprising the plasma generator according to any one of claims 1 to 7 or the cleaning and purifying device according to claim 8.

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