JP4596989B2 - Electrolyzed water generator - Google Patents

Description

  The present invention relates to an electrolyzed water generating apparatus, and more particularly to an electrolyzed water generating apparatus that generates electrolyzed water used for sterilization of water to be treated by an electrolytic reaction in an electrolytic cell.

  Free residual chlorine has been used for sterilization and deodorization of tap water, pool water, and bath water in public baths. It has also been known for a long time that chloride ions contained in fresh water can be converted to free residual chlorine by electrolysis. We also have long known technology for converting water to be treated, such as tap water, to which halogen ions such as chloride ions are added, into electrolyzed water that can be sterilized and deodorized in pools and bathtubs by electrolysis. It has been.

  As an example of the electrolyzed water generating device that generates electrolyzed water by converting chloride ions or the like into chemical species such as free residual chlorine by electrolysis, for example, a water treatment device described in Patent Document 1 can be cited. . In this water treatment device, an electrolyzer in which an electrode pair is submerged is connected to a water storage tank for storing tap water, etc., and water after being electrolyzed in the electrolysis tank is sent to the water storage tank, and Electrolyzed water stored in the water tank is supplied to a tap or the like of a water supply.

And the electrolyzed water produced | generated with such an electrolyzed water generating apparatus is supplied to required places, such as a pool and a bathtub, using a pump, for example.
JP 2004-148266 A

  In addition, in the conventional electrolyzed water generating apparatus, internal piping may be arrange | positioned so that a complicated path | route may be formed as needed. And in the conventional electrolyzed water generating apparatus, there existed a problem that air and residue accumulated in piping and supply of electrolyzed water was not stabilized.

  The present invention has been conceived in view of such circumstances, and an object of the present invention is to provide an electrolyzed water generating device capable of stably supplying electrolyzed water.

Electrolytic water generation apparatus according to the onset Ming, the electrode pairs, and the electrolytic bath accommodating the electrode pair and water, and the electrolytic accelerator supply tank for storing a drug for supplying the halide ions in water, the electrolyte promoted Connected to the pump for feeding the drug from the agent supply tank to the electrolytic tank, the control unit for controlling the supply of power to the electrode pair, the electrolysis promoter supply tank and the pump, and at least partly from the transparent member And a tube.

  Moreover, in the electrolyzed water generating apparatus according to the present invention, it is preferable that the pipe is detachably connected to the electrolysis promoter supply tank and the pump.

  Moreover, in the electrolyzed water generating apparatus according to the present invention, the water channel from the electrolysis promoter supply tank to the pipe is opened and closed, which is installed at a portion of the electrolysis promoter supply tank connected to the pipe or in the vicinity thereof. It is preferable to further include a valve.

  In the electrolyzed water generating device according to the present invention, the electrolysis promoter supply tank is formed at a height at which the medicine is stored and at a height at which the medicine is not stored. A second opening is provided, and the tube preferably includes an opening connected to each of the first and second openings of the electrolysis promoter supply tank.

  Moreover, in the electrolyzed water generating apparatus according to the present invention, the electrolysis promoter supply tank stores a saturated saline solution and is installed at a connection portion between the pipe and the electrolysis promoter supply tank. It is preferable to further include a filter that can be attached to and detached from the agent supply tank.

According to the present onset bright, even when the clogging in the tube by an agent or the like which is supplied from the electrolytic promoter supply tank occurs, that the order that the user can easily find the maintenance, early such as cleaning You can take action.

  Thereby, the situation where the chemical | medical agent is not fully supplied to an electrolytic vessel by the above clogging can be avoided, and the situation where electrolysis in an electrolytic vessel is not fully performed can be avoided. Accordingly, it is possible to more reliably avoid a decrease in the efficiency of supplying electrolyzed water to a device outside the electrolyzed water supply device.

  1 and 2 are diagrams schematically showing a configuration of a water treatment system including an electrolyzed water generating apparatus according to an embodiment of the present invention.

  First, referring to FIG. 1, the water treatment system includes an electrolytic cell generator 100. The electrolyzer generating apparatus 100 mainly includes an electrolyzed water storage tank 30 and an electrolysis promoter supply tank 50.

The electrolyzed water storage tank 30 contains the electrolyzer 10.
The electrolytic cell 10 incorporates an electrode pair 20, and introduces an introduction hole 11 that receives water introduced from tap water or groundwater piping, an exhaust hole 12 that discharges gas generated inside, and discharges an internal solution. A drain hole 13 is provided. The electrolytic tank 10 is configured so that water inside the electrolytic water storage tank 30 can be transferred to and from the electrolytic water storage tank 30 by forming a hole or the like communicating with the electrolytic water storage tank 30. In addition, when the water level in the electrolytic cell 10 exceeds a predetermined water level, the water in the electrolytic cell 10 is discharged from the discharge hole 13 to the drain by opening the valve 13A. A pipe having a blower motor 60 is connected to the exhaust hole 12. The gas generated in the electrolysis in the electrolytic cell 10 is appropriately led to the outside or the exhaust port by driving the blower moat 60.

  The electrolyzed water storage tank 30 is provided with a water level sensor 33 for detecting the water level in the electrolyzed water storage tank 30, and an overflow hole 31 and a discharge hole 32 are formed. When the water level detected by the water level sensor 33 exceeds a predetermined water level, the water in the electrolyzed water storage tank 30 is discharged from the over flowchart hole 31 to the drain, and the valve 32A is opened to open the discharge hole 32. Discharged from.

  A pipe 40 is connected to the electrolyzed water storage tank 30. As will be described later, electrolytic water is stored in the electrolytic water storage tank 30 by performing electrolytic treatment in the electrolytic tank 10. The electrolyzed water is supplied to a pool 80 (see FIG. 2) and a bathtub (not shown) through the pipe 40 when a pump such as the pump 41 is driven.

  Water is introduced into the electrolytic cell 10 from tap water or groundwater piping through the valve 53 </ b> A, the pump 71, the electromagnetic valve 72, and the introduction hole 11. Water is also introduced into the electrolysis promoter supply tank 50 from tap water or groundwater piping via the electromagnetic valve 53B. The valve 53A is normally opened. The opening and closing of the solenoid valve 72 is controlled based on the detection output of the water level sensor 33.

  In the electrolysis promoter supply tank 50, an amount of salt that is more than that dissolved in the water stored in the tank is stored. Then, by introducing water into the electrolysis promoter supply tank 50, saturated saline is accommodated in the electrolysis promoter supply tank 50. The electrolysis promoter supply tank 50 is provided with an inlet 53 for introducing water and an overflow hole 52. When the water level in the electrolysis promoter supply tank 50 exceeds a predetermined water level, the solution in the electrolysis tank promoter supply tank 50 is discharged to the drain through the overflow hole 52. A water level sensor 51 for detecting the water level in the electrolysis promoter supply tank 50 is installed inside the electrolysis promoter supply tank 50, and the electromagnetic valve 53B is opened and closed based on the detection output of the water level sensor 51. Be controlled.

  A pipe 54 is connected to the electrolysis promoter supply tank 50, and a pump 55 is connected to the pipe 54. The tube 54 is connected to the inlet 11 of the electrolytic cell 10. That is, when the pump 55 is driven, the saturated saline in the electrolysis promoter supply tank 50 is introduced into the electrolytic tank 10.

  The electrode pair 20 electrolyzes water in the electrolytic cell 10 by being supplied with electric power through a control circuit (not shown in FIG. 1). Here, a chemical reaction that is considered to occur in the electrolytic cell 50 during electrolysis will be described.

First, in the electrolytic cell 10, the equilibrium shown in Formula (1) is established about water.
H ₂ O⇔H ⁺ + OH ⁻ (1)
Moreover, since sodium chloride is supplied to the water in the electrolytic cell 10, the equilibrium shown in Formula (2) is established for the sodium chloride.

NaCl Ｎａ Na ⁺ + Cl ⁻ (2)
When electric power is supplied to the electrode pair 20, oxygen gas is generated by electrolysis of water in the vicinity of the anode electrode of the electrode pair 20, as shown in equations (3) to (5), and chloride ions are generated. Becomes chlorine gas, and part of the chlorine gas is hydrated to hypochlorous acid.

2H ₂ O⇔O ₂ ↑ + 4H ⁺ + 4e ⁻ (3)
2Cl ⁻ Ｃｌ Cl ₂ ↑ + 2e ⁻ (4)
Cl ₂ + H ₂ O⇔H ⁺ + Cl ⁻ + HClO (5)
In the vicinity of the anode electrode, free residual chlorine that can be used for water sterilization and deodorization is generated in addition to hypochlorous acid by electrolysis.

  Further, in the vicinity of the cathode electrode of the electrode pair 20, hydrogen gas is generated by electrolysis of water as shown in the equation (6).

^{_{2H 2 O + 2e - ⇔ H}} 2 ↑ + 2OH - (6)
In the present embodiment described above, chloride ions are supplied to the electrolytic cell 10 as an example of halide ions in order to be used for sterilization and deodorization of water by electrolysis. The halide ion supplied to is not limited to this.

  However, if chloride ions are supplied using saline, halide ions can be supplied easily and at a relatively low cost. Moreover, in this Embodiment, it is made to supply a salt solution of a fixed density | concentration easily by using it for making electrolysis promoter supply tank 50 store a lot of salt and supplying a saturated salt solution. Can do.

  The electrolyzed water stored in the electrolyzed water storage tank 30 can be supplied to a plurality of different places by a plurality of pumps as described later. For example, the electrolyzed water in the electrolyzed water storage tank 30 is supplied to the pool 80 through the pipe 40 and the pump 41 as shown in FIG.

  A pump 81 is connected to the pool 80. The water in the pool 80 is circulated by supplying the electrolyzed water from the electrolyzed water generating device 100 and appropriately driving the pump 81. Specifically, the water in the pool 80 is returned to the pool 80 again through the sand filter 82 and the heat exchanger 83. In addition, when supply of the electrolyzed water from the electrolyzed water production | generation apparatus 100 is insufficient, the chemical | medical agent for disinfection, such as a sodium hypochlorite, from the chemical | medical agent storage tank 84 by driving the pump 85 to the pool 80. Is supplied. In addition, the medicine storage tank 84 stores sodium hypochlorite as an aqueous solution, for example.

  In FIG. 3, the specific structure of the electrolyzed water generating apparatus 100 of FIG. 1 is shown. FIG. 3 corresponds to a side view of the electrolyzed water generating device of FIG.

  The electrolyzed water generating apparatus 100 includes a control box 1, a tank storage box 2, and a pump storage box 3 in order from the top.

  The control box 1 accommodates a control circuit 70 that controls the supply of power to the electrode pair 20 and the pumps 41, 55, 71 and the like. In the electrolyzed water generating apparatus 100 of the present embodiment, the control box 1 is configured to be separable from the tank housing box 2 and the pump housing box 3 through which moisture passes. That is, in FIG. 3, the control box 1 is shown as being installed integrally with the tank storage box 2 and the pump storage box 3, but electrical wiring between the pump 41 and the like is connected. If so, the control box 1 can be installed at a location separated from the tank storage box 2 and the pump storage box 3. This makes it difficult for the electronic components such as the control circuit 70 to get wet with water, leading to improvement in quality and prolonging the service life of the components, and facilitating maintenance on the control circuit 70 and the like. The operability of the switch (not shown) can be improved.

  An electrolytic water storage tank 30 is stored in the tank storage box 2. 3, illustration of the electrolyzed water storage tank 30 is omitted, and the electrolyzer 10 accommodated in the electrolyzed water reservoir 30 and the electrode pair 20 accommodated in the electrolyzer 10 are shown. Has been. A blower motor 60 is connected to the tank storage box 2. FIG. 4 shows a cross-sectional view taken along the line IV-IV in FIG.

  With further reference to FIG. 4, the pump housing box 3 includes a plurality of pumps (pumps 41 to 44) that send the electrolyzed water generated by the electrolyzed water generating device 100 including the pump 41 to other devices such as a pool and a bathtub. ) Is installed.

  The pipe 40 extends in the vertical direction. Further, the upper end of the pipe 40 is connected to the electrolyzed water storage tank 30, and the lower end thereof is connected to the T-shaped tube 490. The T-shaped tube 490 is installed so that the T-shape is reversed, and one of the lower ends is connected to the L-shaped tube 494 and the other is connected to the L-shaped tube 495.

  As understood from FIGS. 3 and 4, below the pipe 40, the electrolyzed water storage tank 30 is connected to each of a plurality of pumps (pumps 41 to 44) formed by connecting a plurality of pipes. An annular channel 400 for supplying the electrolyzed water inside is arranged. The flow path 400 includes a T-shaped tube 490, an L-shaped tube 495, a T-shaped tube 410, a tube 402, a T-shaped tube 420, a tube 403, a T-shaped tube 450, a tube 404, a T-shaped tube 460, a tube 405, and an L-shaped tube. Tube 491, T tube 493, L tube 492, T tube 480, tube 406, T tube 470, tube 407, T tube 440, tube 408, T tube 430, tube 409, and L tube 494 is configured by sequentially connecting. Each pump 41 is connected to a T-shaped tube 410 via a tube 411. The pump 42 is connected to the T-shaped tube 420 through the tube 421. Further, the pump 43 is connected to the T-shaped tube 430 through the tube 431. The pump 44 is connected to the T-shaped tube 440 through the tube 441.

  In the electrolyzed water generating apparatus 100 of the present embodiment, the T-shaped tubes 410, 420, 430, 440, 450, 460, 480, 470, 490, 493 and the L-shaped tubes 491, 492 are provided in the flow path 400. Change the length of the channel such as 494 and 495 and the diameter of the channel such as the joint of the pipe (the portion through which the electrolytic water of the inner wall of the channel 400 passes) (cross-sectional area of the channel) The pipe constituting the portion is made of a transparent member so that a pool of internal air and the like and a dust pool such as residue can be visually recognized from the outside. In addition, in this Embodiment, the piping made transparent is not limited to said T-shaped tube or L-shaped tube. If the accumulation of air or residue in the T-shaped tube or L-shaped tube, where the accumulation of air or residue is likely to occur as described above, can be visually confirmed, the tubes 402 to 402 instead of the T-shaped tube or L-shaped tube described above. 409 may be formed of a transparent member, and the tubes 402 to 409 may be formed of a transparent member in addition to the above T-shaped or L-shaped tube. Further, the pipe 40 may be made of a transparent member instead of or together with the pipes forming the flow path 400. This is because it is considered that at least a part of the flow path 400 is able to visually recognize the accumulation of air and residue by at least the pipe 40 being made of a transparent member.

  The annular channel 400 has one end connected to the pipe 40 and the other end connected to the drain via the pipe 499 and a pump (not shown). Note that the pipe 499 may be connected to a tank that stores electrolyzed water, and the electrolyzed water in the electrolyzed water storage tank 30 may be stored in the tank.

  Further, as understood from FIG. 4, the flow path 400 is configured to be inclined downward as a whole. As described above, the portion of the piping connecting the electrolyzed water generating apparatus 100 and the pumps 41 to 44 that sends the electrolyzed water in the horizontal direction is configured to incline downward, whereby the electrolyzed water generating apparatus 100 pumps When electrolyzed water is sent to 41-44, the flow of the electrolyzed water in the flow path 400 is promoted. Thereby, accumulation of air, residue, or the like in the flow path 400 can be suppressed.

In FIG. 5, the longitudinal cross-section of the electrolysis promoter supply tank 50 is typically shown.
Referring to FIG. 5, the electrolysis promoter supply tank 50 has a charging port 500 for charging salt on the upper surface thereof. The input port 500 is closed with a lid 501.

  On the side surface of the electrolysis promoter supply tank 50, a water supply port 53 is formed for allowing water sent through the electromagnetic valve 53B to pass through. The water supply port 53 is opened and closed by a valve 53C. A floating ball 530 is connected to the valve 53C. By the floating ball 530, the valve 53C opens and closes so that the inside of the electrolysis promoter supply tank 50 becomes a constant water level.

  A large amount of salt 5 is stored inside the electrolysis promoter supply tank 50. Thereby, in the electrolysis promoter supply tank 50, when water is supplied, saturated saline can be stored.

  A transparent tube 57 is attached to the side surface of the electrolysis promoter supply tank 50. The transparent tube 57 communicates with the electrolysis promoter supply tank 50 at two locations, the lower portion and the upper portion. Specifically, on the side surface of the electrolysis promoter supply tank 50, a communication hole 50 </ b> A is formed in the upper part, and a connection pipe 50 </ b> B is formed in the lower part. The transparent tube 57 is connected to the electrolysis promoter supply tank 50 by fitting the communication portion 57A formed in the upper portion thereof into the communication hole 50A and connecting the lower end thereof to the connection tube 50B. Note that a valve 570 for opening and closing the connection pipe 50B is provided below the connection part of the connection pipe 50B with the transparent pipe 57.

  In the electrolysis promoter supply tank 50, a filter 502 is installed at the root portion where the connection pipe 50B is formed. The saturated saline solution in the electrolysis promoter supply tank 50 is introduced into the transparent tube 57 through the filter 502 and the connection tube 50B.

  The communication hole 50A is formed above the water level at which the floating ball 530 opens and closes the valve 53C in the electrolysis promoter supply tank 50. That is, the electrolysis promoter supply tank 50 is transparent at two locations: a connecting pipe 50B having an opening at a height where the saturated saline solution exists and a communication hole 50A formed at a height where the saturated salt solution does not exist. A pipe 57 is connected. As a result, the saturated saline solution in the electrolysis promoter supply tank 50 is introduced into the transparent tube 57, and the air generated in the transparent tube 57 is passed through the communication portion 57A and the communication hole 50A. It is possible to escape to the 50 side.

  A tube 54 is disposed in the transparent tube 57. The saturated saline solution in the electrolysis promoter supply tank 50 is sent to the electrolysis tank 10 via the pipe 54 when the pump 55 is driven. The upper part of the transparent tube 57 is covered with a lid 571. Thereby, the evaporation of moisture in the transparent tube 57 is suppressed.

  The transparent tube 57 is configured by a totally transparent member. Thereby, the water level in the transparent tube 57 can be easily visually recognized from the outside. Therefore, it is possible to easily avoid a situation where the solution in the electrolysis promoter supply tank 50 is insufficient and sufficient saturated saline is not supplied to the electrolytic tank 10 due to a failure of the valve 53C or the like.

  Note that the tube 54 is also preferably made of a transparent member so that salt clogging or the like inside the tube 54 can be visually recognized.

  In FIG. 6, the enlarged view of the connection part of the connection pipe 50B and the transparent tube 57 is shown. In FIG. 6, these valves 570 are omitted.

  The lower end of the transparent tube 57 and the upper end of the connecting tube 50B are respectively threaded. That is, the transparent tube 57 is attached to the electrolysis promoter supply tank 50 by screwing the lower end of the transparent tube 57 to the connection tube 50B and fitting the communication portion 57A into the communication hole 50A.

  The transparent tube 57 is screwed to the connecting tube 50B so as to sandwich the filter 58. Like the filter 502, the filter 58 is made of a material such as polypropylene that does not deteriorate against saline. In addition, it is preferable that the filter 58 has a fineness of about 18 mesh so that only the saturated saline solution can be passed from the electrolysis accelerator supply tank 50 to the transparent tube 57 without passing the salt solution. A filter 54A is also attached to the lower end of the tube 54. The filter 54A is also preferably made of the same material as the filter 58.

  In the present embodiment, the transparent tube 57 is configured to be detachable from the electrolysis promoter supply tank 50 and the pump 55. The transparent tube 57 is made of a transparent member. Since the transparent tube 57 is configured in this way, the transparent tube 57 is removed even when salt accumulates in the transparent tube 57, for example, over the filters 502 and 58 from the electrolytic accelerator supply tank 50. Salt can be removed. As a result, it is possible to avoid a situation in which the tube 54 is clogged and the saturated saline is not sufficiently supplied to the electrolytic cell 10.

  In addition, as described above, the valve 570 for opening and closing the connection pipe 50B is installed below the connection part of the connection pipe 50B with the transparent pipe 57, that is, upstream of the connection part with the transparent pipe 57. Yes. As a result, if the transparent tube 50B is closed by the valve 570, the salt and saline contained in the electrolysis promoter supply tank 50 are removed from the electrolysis promoter even if the transparent tube 57 is removed from the electrolysis promoter supply tank 50. The transparent tube 57 can be cleaned without being removed from the supply tank 50.

  In the transparent tube 57, it is preferable to install a tube 575 that covers the outer shell of the tube 54 as shown in FIG. . The upper end of the tube 575 is located at the upper end of the transparent tube 57, and the lower end thereof is located below the lower end of the tube 54. And it is preferable that the pipe | tube 575 is comprised with a transparent member so that the mode in the pipe | tube 54 can be seen. Moreover, when installing such a pipe | tube 575, it is preferable that the filter of the material similar to the filter 58 (refer FIG. 6) is installed in the lower end of the pipe | tube 575 further.

  8-10 is a figure which shows the modification of the electrolyzed water generating apparatus 100 shown in FIG. 3, FIG. 8 is a side view of the electrolyzed water generating apparatus 100, FIG. 9 is a rear view, 10 is a top view thereof.

  Also in the electrolyzed water generating apparatus 100 shown in FIGS. 8 to 10, the control box 1 accommodates the control circuit 70 and can be installed separately from the tank housing box 2 and the pump housing box 3. It is configured.

  Moreover, in the electrolyzed water generating apparatus 100 shown in FIGS. 8 to 10, a member including the flow meter 19 is accommodated in the tank housing box 2 or the pump housing box 3. The flow meter 19 is installed in the electrolyzed water generating device 100 in order to measure the amount of water flowing into the electrolyzed water storage tank 30. Moreover, in the electrolyzed water generating apparatus 100 shown in FIGS. 8 to 10, the blower motor 60 is installed directly above the tank storage box 2.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows typically the structure of the water treatment system containing the electrolyzed water generating apparatus which is one embodiment of this invention. It is a figure which shows typically the structure of the water treatment system containing the electrolyzed water generating apparatus which is one embodiment of this invention. It is a figure which shows the specific structure of the electrolyzed water generating apparatus of FIG. It is arrow sectional drawing which follows the VI-VI line of FIG. It is a figure which shows typically the longitudinal cross-section of the electrolysis promoter supply tank of FIG. It is an enlarged view of the connection part of the connection pipe and transparent tube of FIG. It is a figure which shows the modification of the transparent tube of FIG. It is a side view of the modification of the electrolyzed water generating apparatus of FIG. It is a rear view of the electrolyzed water generating apparatus of FIG. It is a top view of the electrolyzed water generating apparatus of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Control box, 2 tank accommodation box, 3 Pump accommodation box, 10 Electrolysis tank, 11 Introduction hole, 12 Exhaust hole, 13 Drainage hole, 19 Flowmeter, 20 Electrode pair, 30 Electrolyzed water storage tank, 40 Piping, 41-44 , 55, 71 Pump, 50 Electrolysis promoter supply tank, 50A communication hole, 50B Connection pipe, 57 Transparent pipe, 60 Blower motor, 70 Control circuit, 100 Electrolytic tank generator, 402-409 pipe, 410, 420, 430, 440 450, 460, 470, 480, 490, 493 T-shaped tube, 491, 492, 494, 495 L-shaped tube, 570 valve.

Claims (5)

An electrode pair;
An electrolytic cell containing the electrode pair and water;
An electrolysis promoter supply tank for storing a chemical that supplies halide ions in water;
A pump for sending the drug from the electrolytic promoter supply tank to the electrolytic tank;
A control unit for controlling the supply of power to the electrode pair;
An electrolyzed water generating device including the electrolysis promoter supply tank and a pipe connected to the pump and at least partially made of a transparent member. The electrolyzed water generating apparatus according to claim 1 , wherein the pipe is detachably connected to the electrolysis promoter supply tank and the pump. The valve according to claim 1 or 2 , further comprising a valve that opens and closes a water channel from the electrolytic accelerator supply tank to the pipe, which is installed in a portion of the electrolytic promoter supply tank connected to the pipe or in the vicinity thereof. The electrolyzed water generating apparatus described in 1. The electrolysis promoter supply tank includes a first opening formed at a height at which the drug is stored and a second opening formed at a height at which the drug is not stored.
The tube has an opening which is connected to each of said first and second openings of the electrolyte accelerator supply tank, the electrolytic water generator according to any one of claims 1 to 3. The electrolysis promoter supply tank stores saturated saline,
The electrolysis according to any one of claims 1 to 4 , further comprising a filter that is installed at a connection portion between the tube and the electrolysis promoter supply tank and is detachable from the tube and the electrolysis promoter supply tank. Water generator.

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