JP2016073962A - Water purification device and filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly practical water purification device which allows a user to see through the inside thereof, the operation and the maintenance work such as cleaning of which can be left to the user, and which can reduce a cost burden on the user.SOLUTION: A container 1 of an electrolytic tank 10 is made of transparent acrylic resin and allows a user to see through the inside. An electrode plate 31 is immersed in water to be cleaned which flows from a water inlet 5 to a water outlet 7 in the container 1. The electrode plate 31 is attached to a lid part 21 to be positioned below the attachable/detachable lid part 21 and is supported by an electrode plate support member 20. DC voltage is applied to a plurality of electrode plates 31 by a power source 45. The polarity of the DC voltage can be inverted manually. Scales are adsorbed to and fall off the plurality of electrode plates 31 alternately depending on the inversion of the polarity. The scales which have fallen off the electrode plates are made to stay on a bottom wall 9 of the container 1. The scales which have been made to stay on the bottom wall can be drained together with the water to be cleaned by opening a drain valve 83.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water purification apparatus using electrolysis and a filter suitable for use in the water purification apparatus.

  Scales adhere to and accumulate on pipes, etc. due to substances causing scale (scale) such as calcium and magnesium in circulating water such as cooling towers, chillers and boilers used in factories and office buildings, groundwater, and industrial water. In addition, it is known that piping clogging, corrosion, machine troubles, and the like are caused. In order to prevent such adhesion and accumulation of scale, a water purification technique for removing scale-causing substances by electrolyzing circulating water has been known for a long time. This water purification technology by electrolysis is an environmentally friendly technology that does not require the use of chemicals, and has recently been reevaluated in recent years, and technical improvements are being promoted (for example, patent documents). 1).

  However, since the conventional water purification device using electrolysis is installed in the user's equipment in the form of a black box, it is difficult to grasp the situation inside the device from time to time. Invert the polarity of the voltage applied to the electrode at an appropriate time according to the scale's adhesion status, or discharge the scale at an appropriate time according to the scale's accumulation status that has fallen off the electrode, It was something that could not be done. For this reason, the electrical conductivity of water is measured and the voltage is inverted based on the measured value, or the voltage is inverted at a short fixed period regardless of the water condition, or the scale is adjusted using a solenoid valve. The operation was automated so that it was discharged frequently. As a result, an appropriate operation is not always performed at an appropriate time, and the apparatus is costly for the user.

Japanese Patent No. 4888869

  The present invention has been made in view of the above-described problems, and allows the user to visually check the situation inside the apparatus and allow the user to perform maintenance operations such as operation and cleaning of the apparatus. The purpose of the present invention is to provide a highly practical water purification device that can perform an appropriate operation at a time and that can reduce the cost burden on the user, and further suitable for use in the water purification device. The purpose is to provide.

  In order to solve the above-described problems and achieve the above-described object, a first aspect of the present invention is a water purification apparatus, which includes an electrolytic cell, a drain valve, and a power source. The electrolytic cell includes a container, a lid, a plurality of electrode plates, an electrode plate support member, and a plurality of electric wires. At least a substantial part of the container is made of a material that can be seen through, the upper end is open, a water inlet and a water outlet are formed on the side wall, and a water outlet is formed on the bottom wall. The lid part detachably covers the upper end opened by the container. The electrode plate support member is connected to the lid portion so as to be positioned in the container below the lid portion, and the plurality of electrode plates are disposed in the container so that main surfaces thereof face each other with a gap therebetween. It is supported upright or inclined. One end of each of the plurality of electric wires is individually electrically connected to the plurality of electrode plates, and the other end is guided to the outside of the container. The drain valve is connected to the drain port. The power source is connected to the other end of the plurality of electric wires, and applies a DC voltage that causes electrolysis to the water to be purified between the plurality of electrode plates so that the polarity can be reversed.

  According to this configuration, the purification target water is supplied from the water inlet into the container, and the purification target water in the container is taken out from the water outlet by the same amount as the supply amount. The amount of water in the container can be maintained at the height of immersion in the container. By applying a DC voltage to a plurality of electrode plates, electrolysis occurs in the water to be purified in the container, and scale-causing substances in the water to be purified can be adsorbed and accumulated on the electrode plate that has become the negative electrode. . By reversing the polarity of the applied voltage, the accumulated scale is peeled off from the original negative electrode plate inverted to the positive electrode, and the scale-causing substance is adsorbed and accumulated on the newly negative electrode plate. can do. In this way, the water to be purified is purified by the electrolytic cell, and the purified water can be taken out from the outlet.

  The scale that has been peeled off accumulates on the bottom wall of the container where the drainage port is formed by descending underwater. When the scale accumulates to some extent, the scale can be discharged out of the container together with the water in the container by opening the drain valve. If the scale does not pass through the outlet, remove the lid from the container, smash the scale accumulated on the bottom wall with a stick, etc. Can be discharged.

  Since at least a substantial part of the container is made of a material that can be seen through, the amount of scale accumulated on the electrode plate and the state of the scale accumulated on the bottom wall of the container can be easily externally applied. Can be visually observed. Based on the result of visual inspection, it is possible to determine when the polarity of the DC voltage to be applied is reversed, when the scale is discharged from the discharge port, whether the accumulated scale is large enough to be crushed for discharge, etc. . Moreover, even when dirt progresses on the inner wall of the container, the dirt can be easily seen from the outside, and further, the lid can be removed and a cleaning tool can be inserted to clean the inside while visually observing. The “material that can be seen through the inside” only needs to be seen through to the extent that such a purpose can be achieved. It is also possible to take an automated form of the power supply so that the polarity of the DC voltage is reversed, for example, at regular intervals.

  In this configuration, for example, the cooling water stored in the water storage tank of the cooling tower and used for cooling in a circulating manner is supplied as the purification target water to the electrolysis tank, and the purified water is returned to the water storage tank. It can be used for the purpose of purifying the water to be purified while circulating it.

  According to a second aspect of the present invention, there is provided a water purification apparatus according to the first aspect, wherein the container includes an inclined surface in which an inner wall surface at a lower portion of the side wall is directed toward the drain port. Yes.

  According to this configuration, the scale peeled off from the electrode plate slides on the slope forming a part of the inner wall surface of the container and accumulates in the vicinity of the drain outlet. For this reason, the scale is easily discharged when the scale is discharged out of the container together with the water in the container by opening the drain valve.

  According to a third aspect of the present invention, there is provided a water purification apparatus according to the first or second aspect, wherein the water outlet is formed at a position higher than the top of the electrode plate in the container, and the water inlet is The container is formed at a position equivalent to or higher than the water outlet.

  According to this configuration, the water outlet can be used as an overflow that keeps the water level of the purification target water in the container constant, whereby the water level in the container is easily maintained at a height at which the plurality of electrode plates are immersed. be able to. Moreover, it can prevent that the purification object water in a container returns backward from a water inlet.

  According to a fourth aspect of the present invention, there is provided a water purification apparatus according to any one of the first to third aspects, wherein the purification target water that is connected to the water inlet and supplied to the water inlet is filtered. A pre-filter is further provided.

  According to this configuration, contaminants such as micro-organisms, sludge, and dust that are not removed by electrolysis can be removed before entering the electrolytic cell.

  According to a fifth aspect of the present invention, there is provided a water purification apparatus according to the fourth aspect, wherein the front-stage filter comprises a cylindrical core material, a cylindrical filter, a filtration container, and a lid. I have. The cylindrical core material has a porous structure on the side wall. The cylindrical filter has a cylindrical shape with one end closed, and a substantial part is a flexible net-like shape, and the cylindrical core material is received inside so as to cover a side wall from one end of the cylindrical core material, The vicinity of the other end is folded inward from the other end of the cylindrical core member. The said filtration container is a cylindrical thing which has a water outlet, one end opens, and accommodates the said cylindrical core material and the said cylindrical filter. The said cover part of the said front stage filter covers the said one end which the said filtration container opens so that attachment or detachment is possible, and has a flange and a cylindrical body. The flange is detachably attached to the one end of the filtration container that opens, and covers the one end. The cylindrical body is connected to the surface of the flange on the filtration container side and extends into the filtration container. The cylindrical body is detachably inserted inside the cylindrical core near the other end so as to sandwich the folded portion of the cylindrical filter between itself and the cylindrical core. Thus, the cylindrical core member and the cylindrical filter are supported. The flange has a water inlet formed inside the cylindrical body. The water outlet of the filtration container communicates with the water inlet of the container of the electrolytic cell.

  According to this configuration, the cylindrical core material and the cylindrical filter surrounding the cylindrical core material are attached by attaching the lid portion that supports the cylindrical core material and the cylindrical filter to the opening end of the filtration container. It can be installed in a filtration container. The purification target water can be supplied to the inside of the cylindrical core material through the water inlet formed in the flange of the lid portion, and the supplied purification target water passes through the porous structure of the cylindrical core material, and the cylindrical filter When passing from the inside to the outside, the contaminant contained in the water to be purified can be removed by the cylindrical filter. The purification target water from which the pollutants have been removed is supplied to the water inlet of the electrolytic cell container through the water outlet of the filtration container. Moreover, the cylindrical filter can be cleaned by removing the lid from the filtration container, removing the cylindrical core from the cylindrical body of the lid, and removing the cylindrical filter from the cylindrical core. Can be installed. Since the substantial part of the cylindrical filter has a flexible mesh shape, it is easy to clean.

  According to a sixth aspect of the present invention, there is provided the water purification apparatus according to the fifth aspect, wherein the tubular filter is formed with wrinkles along the side surface of the tubular core material. The cylindrical core material is covered loosely.

  According to this configuration, the surface area of the cylindrical filter can be increased, and as a result, the cleaning time interval of the cylindrical filter can be increased.

  According to a seventh aspect of the present invention, there is provided a water purification apparatus according to the fifth or sixth aspect, wherein at least a substantial part of the filtration container is made of a material that can be seen through.

  According to this configuration, the state of contamination and clogging of the cylindrical filter can be confirmed visually from the outside, and it is possible to determine when to clean the cylindrical filter based on the visual result.

  According to an eighth aspect of the present invention, there is provided a filter for filtering a liquid, comprising a cylindrical core material, a cylindrical filter, a filtration container, and a lid. The cylindrical core material has a porous structure on the side wall. The cylindrical filter has a cylindrical shape with one end closed, and a substantial part is a flexible net-like shape, and the cylindrical core material is received inside so as to cover a side wall from one end of the cylindrical core material, The vicinity of the other end is folded inward from the other end of the cylindrical core member. The said filtration container is a cylindrical thing which has a liquid discharge outlet, and one end opens, and accommodates the said cylindrical core material and the said cylindrical filter. The said cover part covers the said one end which the said filtration container opens so that attachment or detachment is possible, and has a flange and a cylindrical body. The flange is detachably attached to the one end of the filtration container that opens, and covers the one end. The cylindrical body is connected to the surface of the flange on the filtration container side and extends into the filtration container. The cylindrical body is detachably inserted inside the cylindrical core near the other end so as to sandwich the folded portion of the cylindrical filter between itself and the cylindrical core. Thus, the cylindrical core member and the cylindrical filter are supported. The flange has a liquid inlet formed inside the cylindrical body.

  According to this configuration, the cylindrical core material and the cylindrical filter surrounding the cylindrical core material are attached by attaching the lid portion that supports the cylindrical core material and the cylindrical filter to the opening end of the filtration container. It can be installed in a filtration container. The liquid to be purified can be supplied to the inside of the cylindrical core material through the liquid inlet formed in the flange of the lid, and the supplied liquid to be purified passes through the porous structure of the cylindrical core material, and the cylindrical filter When passing through from the inside to the outside, the contaminant contained in the liquid to be purified can be removed by the cylindrical filter. The liquid to be purified from which the pollutants have been removed is taken out through the liquid outlet of the filtration container. Moreover, the cylindrical filter can be cleaned by removing the lid from the filtration container, removing the cylindrical core from the cylindrical body of the lid, and removing the cylindrical filter from the cylindrical core. Can be installed. Since the substantial part of the cylindrical filter has a flexible mesh shape, it is easy to clean.

  According to a ninth aspect of the present invention, there is provided the filter according to the eighth aspect, wherein the cylindrical filter is loose so that wrinkles are formed along the side surface of the cylindrical core member. The cylindrical core material is covered.

  According to this configuration, the surface area of the cylindrical filter can be increased, and as a result, the cleaning time interval of the cylindrical filter can be increased.

  According to a tenth aspect of the present invention, there is provided the filter according to the eighth or ninth aspect, wherein at least a substantial part of the filtration container is made of a material that can be seen through.

  According to this configuration, the state of contamination and clogging of the cylindrical filter can be confirmed visually from the outside, and it is possible to determine when to clean the cylindrical filter based on the visual result.

  As described above, according to the present invention, it is possible to visually check the state of the inside of the apparatus, and to allow the user to perform maintenance work such as operation and cleaning of the apparatus, thereby enabling appropriate operation at an appropriate time. Therefore, a highly practical water purification device that can reduce the cost burden on the user is realized. Furthermore, a filter suitable for use in the water purification apparatus can be obtained.

It is a perspective view which shows the whole structure of the water purification apparatus by one embodiment of this invention. It is front sectional drawing of the electrolytic cell of the water purification apparatus of FIG. It is an exploded view of the front | former stage filter 51 of the water purification apparatus of FIG. It is front sectional drawing of the front | former stage filter 51 of the water purification apparatus of FIG.

  FIG. 1 is a perspective view showing an overall configuration of a water purification apparatus according to an embodiment of the present invention. The water purification apparatus 101 includes an electrolytic cell 10, a front-stage filter 51, a drainage filter 81, a pump 71, and a mount 91. The electrolytic cell 10 is installed on a gantry 91 and includes a container 1, a lid 21, an electrode plate support member 20, and an electrode plate 31. The container 1 is formed of a transparent acrylic resin plate and has an upper end opened. A water inlet 5 is opened on one side (left side as viewed from the front) of the upper side wall of the container 1 and a water outlet 7 is opened on the other side (right side when viewed from the front). A drain port 11 is opened in the bottom wall 9 of the container 1.

  The inner wall surface of the lower portion of the side wall on the back side of the container 1 forms an inclined surface 13 that protrudes forward as it goes downward and approaches the drain port 11. That is, the container chamber 3, which is the internal space of the container 1, has a substantially pentagonal shape in side view due to the inclined surface 13. The slope 13 is formed by inclining and arranging a transparent acrylic resin flat plate as a partition plate in the lower part of the rectangular parallelepiped container constituting the container 1. By this partition plate, the inside of the rectangular parallelepiped container is liquid-tightly divided into a container chamber 3 capable of storing water and a back chamber 15 having a triangular shape in a side view located at the lower back. That is, the water stored in the container chamber 3 does not leak into the back chamber 15. The rear wall of the back chamber 15 is provided with a hinge (not shown) at the upper end, so that it can be opened and closed around the upper end as shown by the dotted line in FIG. As a result, the back room 5 can be used as a place for installing related equipment that requires manual operation or removal. The back wall that opens and closes the back chamber 5 is also made of a transparent acrylic resin plate.

  The lid portion 21 detachably covers the upper end of the container 1 that is opened, and is formed of a transparent acrylic resin plate in the same manner as the container 1. The electrode plate support member 20 is attached to the lid portion 21 by four support rods 23. The electrode plate support member 20 is attached below the lid portion 21 so as to be positioned in the container chamber 3. The electrode plate support member 20 has a hollow frame body 25 connected to the lower end of the support rod 23, and an electrode plate spacer 27 arranged on the frame body 25. The electrode plate spacers 27 are detachably attached to the frame body 25, and can be arranged with a narrow interval or can be arranged with a wide interval. FIG. 1 shows an example in which the left half is widened and the right half is narrowed when viewed from the front.

  A plurality of electrode plates 31 are detachably mounted on the electrode plate support member 20. These electrode plates 31 are supported by the electrode plate support member 20 in an upright or inclined state by being inserted between adjacent electrode plate spacers 27. The spacer 27 supports the electrode plates 31 so as not to fall down, and functions to regulate the interval between the electrode plates 31. The frame 27 is made of a transparent acrylic resin plate, and the support rod 23 and the electrode plate spacer 27 are made of plastic.

  Electric wires 41 and 43 are electrically connected to the electrode plate 31 through the connection portion 33. A power source 45 is connected to the electric wires 41 and 43, and the power source 45 applies a DC voltage to the electrode plate 31 through the electric wires 41 and 43. The power supply 45 generates a DC voltage by obtaining commercial power through the electric wire 47. The power supply 45 can manually reverse the polarity of the DC voltage applied to the electrode plate 31. The electric wires 41 and 43 have a coating formed of a flexible plastic. A groove 17 for guiding the electric wires 41 and 43 from the container chamber 3 to the outside of the container 1 is formed in a part of the upper end face of the container 1 that opens. The power source 45 is disposed in the back chamber 15, for example.

  A pre-stage filter 51 is connected to the water inlet 5 formed on the side wall of the container 1 through a pipe 66. The pre-stage filter 51 is for removing contaminants such as micro-organisms, sludge, and dust contained in the water to be purified supplied to the water inlet 5.

  For example, cooling water stored in a water storage tank provided in the lower part of the cooling tower and used for cooling in a circulating manner is sucked as purification target water by a pump 71 installed on the gantry 91 through a pipe 73. The suctioned water to be purified is injected into the main body of the front-stage filter 51 through a pipe 61 and a water inlet valve 53 provided at the top of the front-stage filter 51. The injected water to be purified is filtered by a filter provided in the main body of the pre-stage filter 51. The filtered water to be purified is supplied to the container chamber 3 through the pipe 66 and the water inlet 5 of the container 1. In the purification target water supplied to the container chamber 3, the scale-causing substance is removed by the electrolysis action of the electrode plate 31 to which a voltage is applied. The purification target water thus purified is returned to the original water storage tank through the water outlet 7 of the container 1. In this way, the cooling water stored in the water storage tank is purified.

  A drain valve 55 is connected to the lower end of the front-stage filter 51. When cleaning the filter of the front-stage filter 51, the water to be purified stored in the front-stage filter 51 can be discharged by closing the water inlet valve 53 and opening the drain valve 55. The discharged water to be purified is sent to a sewerage facility or the like through the pipe 63. In the example of FIG. 1, the front-stage filter 51 is attached to the side wall of the container 1 through a fixing member.

  A drainage pipe 85 is connected to a drainage port 11 opening in the bottom wall 9 of the container 1 through a drainage filter 81. A drain valve 83 is inserted in the drain pipe 85. When removing the scale accumulated on the bottom wall 9 of the container 1 due to the scale-causing substance adsorbed on the electrode 31 to form a scale and then peeling off, the container is opened by opening the drain valve 83. The purification target water in the chamber 3 can be discharged. The purification target water that is discharged passes through the drainage filter 81, and thus the scale is removed. The drainage from which the scale has been removed is sent to a sewage treatment facility or the like through a drainage pipe 85.

  FIG. 2 is a front sectional view of the electrolytic cell 10 of the water purification apparatus 101. The operation of the water purification apparatus 101 that removes the scale-causing substance of the water to be purified will be described with reference to FIG. As illustrated in FIG. 2, the water outlet 7 of the container 1 is formed at a position higher than the top of the electrode plate 31, and the water inlet 5 is formed at a position slightly higher than that. Thereby, the electrode plate 31 is maintained in a state of being immersed in the purification target water 4 in the container chamber 3. It is possible to use the water outlet 7 as an overflow so that the water to be purified 4 exceeding the height of the water outlet 7 overflows from the water outlet 7, thereby making the water level of the water 4 to be purified easily constant Can be maintained. Further, since the water inlet 5 is formed at a position higher than the water outlet 7, it is possible to prevent the purification target water 4 in the container chamber 3 from flowing backward from the water inlet 5.

  In the example of FIG. 2, four electrode plates 31 are installed on the electrode plate support member 20. The electrode plates 31A, 32A, 31B, and 32B are formed identically to each other, and are formed of, for example, a titanium plate material plated with platinum. By using the material for the electrode plate 31, the efficiency of adsorption of the scale-causing substance is good and the life of the electrode plate 31 can be kept long.

  The electrode plates 31A, 32A, 31B, and 32B are electrically connected to the power source 45 through electric wires 41A, 43A, 41B, and 43B, respectively. The power supply 45 has a DC power supply 46 that generates a DC voltage, and a switch 44 that applies the DC voltage generated by the DC power supply 46 between the electric wires 41A and 41B and the electric wires 43A and 43B so that the polarity can be reversed. doing. The switch 44 is a manual switch as an example.

  When the user of the water purification apparatus 101 operates the switch 44, the electrode plates 31A and 31B connected to the electric wires 41A and 41B become positive voltage, and the electrode plates 32A and 32B connected to the electric wires 43A and 43B become negative voltage. Thus, when a DC voltage is applied to the electrode plates 31A, 32A, 31B, and 32B, the electrolysis of the purification target water 4 proceeds. As a result, a scale-causing substance such as calcium is adsorbed on the electrode plates 32A and 32B having a negative voltage. The scale-causing substance forms a solid scale layer that covers the electrode plates 32A and 32B as the adsorption proceeds. Since the container 1 can be seen through from the outside, the degree of formation of the scale layer can be easily seen from the outside. When it is observed that the scale layer has become considerably thicker, the user opens the back wall of the back chamber 15 (see FIG. 1) and switches the switch 44 of the power supply 45. The switch 44 may be automated so that the switch 44 is automatically switched at fixed time intervals or at a period set by the user, instead of manually. Since the container 1 can be seen through, the user can easily set the switching cycle according to the state of the purification target water 4.

  When the switch 44 is switched, the scale-causing substance is adsorbed to the electrode plates 31A and 31B that are inverted to a negative voltage. On the other hand, from the electrode plates 32A and 32B inverted to the positive voltage, the scale already forming the solid layer is peeled off as a large lump or divided into small pieces by the action of the positive voltage. The scale 36 that has fallen off slides on the slope 13 and accumulates on the bottom wall 9 of the container 1. The user sees from the outside how the scale 36 has accumulated, and confirms that the scale 36 has accumulated considerably, thereby opening the drain valve 83 (see FIG. 1) to discharge the purification target water 4 from the container chamber 3. . The scale 36 is discharged together with the water to be purified 4 discharged. The discharged scale 36 is collected by a drainage filter 81. When it is confirmed through fluoroscopy that the scale 36 accumulated on the bottom wall 9 is not large enough to pass through the discharge port 11, the user removes the lid 21 from the container 1, and the electrode plate support member 20 and The electrode plate 31 is pulled up from the purification target water 4. Thereafter, the scale 36 can be crushed into small pieces by poking the scale accumulated on the bottom wall 9 using a bar or the like. The scale 36 crushed into small pieces can be discharged together with the drainage.

  Thus, since the container 1 can be seen through, maintenance of the electrolytic cell 10 by the user can be easily performed. Moreover, since the members in the container chamber 3 including the container 1 are made of plastic and the electric wires 41 and 43 also have a plastic coating, the electrolysis by the electrode plate 31 is not hindered and corroded. Is unlikely to occur.

  FIG. 3 is an exploded view of the front-stage filter 51. FIG. 4 is a front sectional view of the front-stage filter 51. The structure and function of the pre-stage filter 51 will be described with reference to these drawings. The pre-stage filter 51 includes a filtration container 151, a lid 160, a cylindrical core member 57, and a cylindrical filter 58.

  The filtration container 151 is a cylindrical container having an open upper end, and a cylindrical body 152 made of transparent vinyl chloride is used on the cylindrical side wall. An annular flange portion 159 is formed at the upper end of the filtration container 151 that opens, and a water outlet 153 is formed in the cylindrical body 152 that forms the side wall. A pipe 66 (see FIG. 1) is connected to the water outlet 153. The filtration container 151 has a bottom member 155 that forms a bottom wall and a lower side wall at the bottom thereof. The cylindrical body 152 has an upper end portion fixed to the flange portion 159 and a lower end portion fixed to the bottom member 155. The flange portion 159 and the bottom member 155 are made of, for example, vinyl chloride. A drain outlet 157 is formed at the center of the bottom wall of the bottom member 155. A drain valve 55 is connected to the drain port 157.

  The cover part 160 covers the upper end which the filtration container 151 opens so that attachment or detachment is possible. The lid 160 has a flange 161, a cylindrical body 165, and a water inlet valve 53. The flange 161 has a disc shape and is fastened to the flange portion 159 of the filtration container 151 to cover the upper end of the filtration container 151 that opens. For fastening, screws such as bolts may be used, and other fastening members may be used. The fastening member known by the name of the sanitary three-point clamp can be attached and detached by a simple manual operation, which is convenient for the maintenance of the filtration container 151 by the user. A water inlet 163 is formed at the center of the flange 161. A water inlet valve 53 is connected to the water inlet 163. The cylindrical body 165 is integrally connected to the lower surface of the flange 161 and extends downward. The cylindrical body 165 is formed so as to surround the water inlet 163. The outer diameter of the cylindrical body 165 is set approximately equal to the inner diameter of the cylindrical core member 57. The flange 161 and the cylindrical body 165 are made of, for example, vinyl chloride.

  The cylindrical core material 57 is a cylindrical body having a porous structure in which an upper end is opened and, as an example, a lower end is also opened. The cylindrical core material 57 is, for example, a plastic lattice, and the lattice is formed to be somewhat thick so as to have a certain degree of rigidity. The cylindrical filter 58 is a cylindrical body that is open at the top and closed at the bottom, and is formed in a flexible net shape that can be folded back, wrinkled, or stretched like a cloth. ing. The meshes function as a filter. In order to remove contaminants, the mesh size is preferably in the range of 300 μm to 700 μm. The cylindrical filter 58 is made of, for example, a net-like plastic, and is made of, for example, polyethylene or nylon. The cylindrical filter 58 has such a diameter that it is in close contact with the outer periphery of the cylindrical core member 57, stores the cylindrical core member 57 inside, and has a length that allows the upper end portion to be excessive. As shown in FIG. 4, the cylindrical filter 58 covers the cylindrical core material 57 in a loose state so that a ridge is formed on the outer periphery of the cylindrical core material 57, and the upper end portion of the cylindrical filter 57 is Used in a state folded from the upper end to the inside. FIG. 4 schematically represents the shape of the ridge of the cylindrical filter 58 with a geometric waveform.

  The cylindrical body 165 of the lid portion 160 is inserted from the upper end of the cylindrical core member 57 into the inside of the vicinity of the upper end of the cylindrical core member 57 while sandwiching the folded portion 59 of the cylindrical filter 58. The cylindrical core member 57 is fixed to the cylindrical body 165 by the frictional force. Thus, the outer diameter of the cylindrical body 165 is set so that it can be pushed into the cylindrical body 165 with the cylindrical filter 58 interposed therebetween and can be prevented from coming off by frictional force. After fixing the cylindrical core member 57 surrounded by the cylindrical filter 58 to the cylindrical body 165, the flange 161 of the lid portion 160 is detachably fastened to the flange portion 159 of the filtration container 151.

  The purification target water supplied through the water inlet valve 53 passes through the inside of the cylindrical body 165 from the water inlet 163, further passes through the gaps in the lattice of the cylindrical core member 57, and surrounds the outer periphery of the cylindrical filter 58. Go through the mesh. Contaminants contained in the water to be purified are filtered out mainly by the cylindrical filter 58. The purification target water from which the contaminants have been removed is accumulated in the filtration container 151 and is sent from the water outlet 153 to the electrolytic cell 10 (see FIG. 1) through the pipe 66.

  The filtered contaminants are accumulated as dirt on the inner surface of the cylindrical filter 58. If the accumulation proceeds to some extent, the cylindrical filter 58 will be clogged, and the function as a filter will be reduced. The user can see through the cylindrical filter 58 from the outside through the transparent cylindrical body 152. When the user confirms that the contamination of the cylindrical filter 58 has reached a considerable degree, the pump 71 is stopped, the water inlet valve 53 is closed, the lid 160 is lifted from the filtration container 151, and the cylindrical body 165 is cylindrical. The core material 57 can be removed, and the cylindrical filter 58 can be removed from the cylindrical core material 57. The removed cylindrical filter 58 can be easily cleaned. Further, the cylindrical core member 57 can be cleaned if necessary. Since the tubular filter 58 is set to have a long overall length so as to form a ridge, a large surface area is secured. As a result, the cleaning time interval of the cylindrical filter 58 can be increased, that is, the frequency of cleaning can be decreased.

  Furthermore, by opening the drain valve 55 connected to the bottom of the filtration container 151, it is possible to discard the water to be cleaned stored in the filtration container 151 and wash the inside of the filtration container 151. The degree of contamination of the filtration container 151 can also be easily visually recognized through the transparent cylindrical body 152. When the cleaning is completed, the pre-filter 51 can be reassembled by going through the reverse order. Thus, since the cylindrical body 152 can be seen through, maintenance of the pre-stage filter 51 by the user can be easily performed. The drainage filter 81 connected to the container 1 can also have the same configuration as that of the front-stage filter 51.

  Although the container 1 showed the example which can be seen through entirely, the substantial part may be seen through so that the inside can be seen through to such an extent that the above-mentioned maintenance is facilitated. For example, the bottom wall 9 may be a material that cannot be seen through, or a small part of the side wall that may not be seen through. Moreover, although the cylindrical filter 58 of the front | former stage filter 51 showed the example which is a flexible net shape as a whole, the substantial part may be a flexible net shape. For example, the bottom may not be meshed, or the small part of the side may not be meshed.

  In the said embodiment, the transparent material illustrated as a transparent acrylic resin can also be replaced with materials other than an acrylic resin, for example, a vinyl chloride and a polycarbonate can be used. Moreover, in the said embodiment, the transparent material illustrated as transparent vinyl chloride can also be replaced with materials other than vinyl chloride, for example, an acrylic resin and a polycarbonate can be used.

DESCRIPTION OF SYMBOLS 1 Container 3 Container room 4 Water to be cleaned 5 Water inlet 7 Water outlet 9 Bottom wall 10 Electrolyzer 11 Drain outlet 13 Slope 15 Back chamber 20 Electrode plate support member 21 Lid 31, 31A, 31B, 32A, 32B Electrode plate 36 Scale 41, 41A, 41B, 43A, 43B Electric wire 45 Power supply 51 Pre-stage filter 57 Cylindrical core material 58 Cylindrical filter 81 Drainage filter 151 Filtration container 153 Drain outlet (outlet)
160 Lid 161 Flange 165 Cylindrical body 163 Water inlet (liquid inlet)

Claims (10)

A container in which at least a substantial part is formed of a material that can be seen through the inside, an upper end is opened, a water inlet and a water outlet are formed on a side wall, and a water outlet is formed on a bottom wall;
A lid that detachably covers the upper end of the container,
A plurality of electrode plates;
Connected to the lid so as to be positioned in the container below the lid, and supports the plurality of electrode plates upright or inclined in the container so that the main surfaces face each other with a space therebetween An electrode plate support member;
An electrolytic cell having a plurality of electric wires with one end individually connected to the plurality of electrode plates and the other end led to the outside of the container;
A drain valve connected to the drain port;
A water purification apparatus comprising: a power source connected to the other end of the plurality of electric wires and configured to apply a DC voltage that causes electrolysis to the water to be purified between the plurality of electrode plates so that polarity can be reversed.   The water purification apparatus according to claim 1, wherein the container includes an inclined surface in which an inner wall surface at a lower portion of the side wall is directed toward the drain port.   The said water outlet is formed in the site | part higher than the top part of an electrode plate among the said containers, and the said water inlet is equivalent to the said water outlet among the said containers, or is formed in a higher position. Water purification equipment.   The water purification apparatus according to any one of claims 1 to 3, further comprising a front-stage filter that is connected to the water inlet and filters the purification target water supplied to the water inlet. The pre-stage filter is
A cylindrical core having a porous structure on the side wall;
The cylindrical core is closed at one end, and a substantial part is a flexible net, and the cylindrical core is received inside so as to cover the side wall from one end of the cylindrical core. A cylindrical filter folded inward from the other end of the cylindrical core;
A tubular filtration container having a water outlet and having one end open, and housing the tubular core material and the tubular filter;
A lid that detachably covers the one end of the filtration container,
The lid of the pre-stage filter is
A flange that is detachably attached to the one end of the filtration container, and covers the one end;
A cylindrical body connected to the surface of the flange on the filtration container side and extending into the filtration container;
The cylindrical body is detachably inserted inside the cylindrical core near the other end so as to sandwich the folded portion of the cylindrical filter between itself and the cylindrical core. By supporting the cylindrical core material and the cylindrical filter,
The flange has a water inlet formed inside the cylindrical body,
The water purification apparatus according to claim 4, wherein the water outlet of the filtration container communicates with the water inlet of the container of the electrolytic cell.   The water purification apparatus according to claim 5, wherein the cylindrical filter loosely covers the cylindrical core material so that wrinkles are formed along a side surface of the cylindrical core material.   The water purification apparatus according to claim 5 or 6, wherein at least a substantial part of the filtration container is formed of a material that can be seen through. A filter for filtering the liquid,
A cylindrical core having a porous structure on the side wall;
The cylindrical core is closed at one end, and a substantial part is a flexible net, and the cylindrical core is received inside so as to cover the side wall from one end of the cylindrical core. A cylindrical filter folded inward from the other end of the cylindrical core;
A cylindrical filtration container having a liquid outlet and having one end opened and housing the cylindrical core material and the cylindrical filter;
A lid that detachably covers the one end of the filtration container,
The lid is
A flange that is detachably attached to the one end of the filtration container, and covers the one end;
A cylindrical body connected to the surface of the flange on the filtration container side and extending into the filtration container;
The cylindrical body is detachably inserted inside the cylindrical core near the other end so as to sandwich the folded portion of the cylindrical filter between itself and the cylindrical core. By supporting the cylindrical core material and the cylindrical filter,
The flange is a filter in which a liquid inlet is formed inside the cylindrical body.   The filter according to claim 8, wherein the cylindrical filter loosely covers the cylindrical core material so that wrinkles are formed along the side surface of the cylindrical core material.   The filter according to claim 8 or 9, wherein at least a substantial part of the filtration container is formed of a material that can be seen through the inside.

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