JP2007326028A - Water purifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water purifier the filter medium and filtration membrane of which can be exchanged easily in a short time without causing problems and without letting remaining water leak on the periphery of the water purifier when they are exchanged. <P>SOLUTION: A filtration membrane element 60, in which any membrane of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane or a reverse osmosis membrane is incorporated, is arranged in the water purifier. The profile of the water purifier is composed substantially of a water purifier body 1 and a water purifier cover part 2. A vessel body 51 for housing the filtration membrane element 60 is arranged in the water purifier body. A vessel cover 52 is attached detachably to the upper part of the vessel body 51. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water purifier provided with a filtration membrane element in which any one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, and a reverse osmosis membrane is installed. More particularly, the present invention relates to a water purifier that manufactures purified water by treating raw water such as tap water with a filter membrane element and that can be easily replaced when the filter membrane element reaches the end of its life.

  In order to purify raw water such as tap water, a water purifier is generally used in the home. Various types of water purifiers, such as those that are directly attached to the faucet, those that are placed away from the faucet (desktop or in the kitchen storage), and alkaline ion water purifiers that perform electrolysis A vessel is being used.

  For example, in a stationary water purifier, raw water is introduced into the main body of the water purifier through a pipe connected to a water tap or a pipe branched from the water pipe. These impurities are removed, and the treated purified water is taken out through another pipe and used for drinking and cooking.

  Moreover, in the stationary water purifier by membrane filtration, a plurality of filter media, filtration filters, hollow fiber membranes, and reverse osmosis membranes are appropriately used in combination depending on the purpose of treating raw water. For example, Patent Document 1 describes a water purifier in which a wind filter made of non-twisted yarn, activated carbon and a hollow fiber membrane, and a reverse osmosis membrane are incorporated, and a cylindrical container containing each of them is a casing containing a water storage tank or the like. The filter medium and the membrane in the container can be exchanged by removing the lid on the upper part of the container. Also, in Patent Document 2, a cartridge containing barley stone and granular activated carbon and a cartridge containing a hollow fiber membrane are erected on the left and right inside the water purifier body, and the cartridge is held down and fixed detachably with an arm. A water purifier having a structure with a cover attached thereto is described, and it is described that the cartridge can be replaced by removing the cover and the holding arm.

Japanese Patent Laid-Open No. 7-24446 Utility Model Registration No. 2532342

  However, when a storage container such as a filter medium is arranged outside the water purifier main body as in Patent Document 1, not only the appearance of the entire apparatus is deteriorated, but also when the filter medium or the filter in the container is replaced, The remaining water was spilled and the area around the water purifier became dirty.

  Moreover, in the water purifier of patent document 2, when replacing | exchanging the activated carbon and hollow fiber membrane which reached the service life, it is necessary to remove a cover and a control arm, and therefore sufficient work space is required for cartridge replacement work. There is a problem of becoming. Furthermore, since the cartridge containing the activated carbon and the cartridge containing the hollow fiber membrane are replaced together, it is difficult to say that the storage container is replaced and discarded, which is preferable from the viewpoint of environmental load.

  Therefore, the present invention is a water purifier that can be easily replaced in a short time without any problems in the replacement of the filter medium or the filtration membrane in the above-described prior art and without wetting the surrounding water with residual water at the time of replacement. The purpose is to provide.

  The water purifier of the present invention is a water purifier in which a filtration membrane element in which any one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, and a reverse osmosis membrane is installed is installed in the water purifier. In addition, the outer shape of the water purifier substantially consists of a water purifier main body and a water purifier lid, and the container main body containing the filtration membrane element is installed in the water purifier main body, and the container lid can be attached to and detached from the upper part of the container main body. Is provided.

  Moreover, it is preferable that the container main body and the container lid are each a resin molded product, and the container lid is fitted to the container main body by a screw type or a bayonet type.

  In the water purifier of the present invention, the container containing the filtration membrane element is disposed inside the water purifier whose outer shape is substantially formed by the water purifier main body and the water purifier lid, so the filtration membrane element is replaced. In this case, there is residual water in the container, and even if the residual water spills out together with the filtered membrane element that has been taken out, it remains in the water purifier main body, so there is no possibility that the outside of the water purifier gets wet and gets dirty. Furthermore, the replacement work of the filtration membrane element can be easily performed in a short time. Also, only the filtration membrane element in the container can be replaced.

  In addition, by fitting and fixing the container body and the container lid for storing the membrane filtration cartridge with a screw type or bayonet type, it is possible to attach the membrane filtration cartridge so that water leakage does not occur with a small number of operations. Removal work is also easy.

  Hereinafter, the water purifier of the present invention will be described with reference to the drawings illustrating the embodiments.

  Drawing 1 is an appearance perspective view (perspective view from the front right side) showing the outline of the water purifier concerning one embodiment of the present invention. FIG. 2 is a perspective view from the back side showing a state in which the main body cover on the back side is removed, and FIG. 3 is an assembled perspective view as seen from the back side. FIG. 4 is a six-sided view showing the appearance (however, a hose is attached to the purified water outlet 144). 5 to 8 are sectional views, FIG. 5 is a longitudinal sectional view showing an arrangement state of the back side portion, FIG. 6 is a longitudinal sectional view showing an arrangement state of the front side portion, and FIG. 7 is an arrangement of the right side portion. FIG. 8 is a cross-sectional view showing the arrangement of the upper surface side portion.

  In the water purifier of the embodiment shown in FIGS. 1 to 8, tap water is used as the raw water, so the raw water inlet 7 of the water purifier 1 is directly connected to the water pipe 6 via the open / close valve 5. The tap water passes from the inlet valve unit 10 disposed at the raw water inlet 7 through the pretreatment unit 20 composed of the coarse filtration means 31 and the silver impregnated activated carbon 32, and then the membrane having the filtration membrane element 60. It passes through the filtration unit 50, and further flows in the order of the second antibacterial unit 90, the tank 100 for storing the purified water, the water discharge pump 140, and the purified water outlet 144, and is discharged to the outside as purified water. Here, when passing through the membrane filtration unit 50, the tap water is separated into concentrated water and permeated water, the permeated water flows into the second antibacterial unit unit 90, and the concentrated water is discharged from the drain port 71 to the outside. Is done.

  The inlet valve unit section 10 is composed of a raw water electromagnetic valve that is opened and closed by a control section 200 to be described later, a pressure reducing valve that adjusts the water pressure of tap water, and a relief valve that prevents the tap water from flowing into the pretreatment section 20 on the downstream side by mistake. Has been. A raw water flow rate sensor 40 is provided between the pretreatment unit 20 and the membrane filtration unit 50. Further, a concentrated water flow rate sensor 80 and a constant flow rate valve 70 are sequentially provided on the downstream side of the concentrated water outlet 54 of the membrane filtration unit 50, and then connected to the drain port 71.

  The permeated water filtered by the membrane is stored in the tank 100 from the permeated water outlet 55 through the second antibacterial unit portion 90. A water level sensor 110 is provided inside the tank 100, and the control unit 200 controls the operation of the raw water electromagnetic valve 11 and the like based on a signal from the water level sensor 110. Also, a drain electromagnetic valve 150 is provided at the bottom of the tank 100. When the permeated water in the tank 100 is not discharged for a certain period of time, the drain electromagnetic valve 150 is opened by a command from the control unit 200 to forcibly drain the water. It is supposed to be.

  A display unit 220 and an operation button unit 240 are provided at the upper part of the main body of the water purifier 1. The control unit 200 performs opening and closing of the electromagnetic valve and controlling the second antibacterial unit unit 90 based on operations of various buttons arranged on the operation button unit 240 and signals from the sensors. 200 is provided inside the display unit 220 and the operation panel 230.

  Since the water purifier of the present invention can be highly purified by membrane filtration and includes a tank for storing purified water, the water purifier is suitable for use in a living area where water quality such as tap water is inferior. Since it is desirable to be as small as possible in order to install it in a residential area such as a kitchen, for example, the size of the water purifier is about 250 to 350 mm in width (A), about 150 to 200 mm in depth (B), The height (C) is preferably about 350 to 450 mm. If the width (A) and the depth (B) exceed the above-mentioned sizes, it becomes difficult to install in a kitchen or the like. Further, when the height (C) is increased, problems such as difficulty in exchanging a cartridge, which will be described later, and an inability to open the upper lid even when installed in a kitchen or the like occur.

  Next, each component installed in the water purifier of the present invention will be described.

  The raw water electromagnetic valve disposed in the inlet valve unit 10 opens and closes based on a signal from a water level sensor 110 provided in the tank 100. When the raw water solenoid valve opens, tap water flows in. When the raw water solenoid valve closes, tap water stops flowing. When the amount of water in the tank 100 falls below a certain level, or when a large amount of permeated water is used at one time, the raw water solenoid valve is open, and an abnormality occurs during the production of permeated water. The raw water solenoid valve is shut off and closed. The raw water solenoid valve only needs to be sufficiently closed with tap water pressure, and as long as a sufficient tap water flow rate can be secured, the valve opening / closing method is not particularly limited, and either method may be used. Either can be used. The raw water solenoid valve may be made of any known material such as stainless steel, brass, or plastic as long as it does not deteriorate even after being in contact with tap water for a long period of time.

  The pressure reducing valve arranged in the inlet valve unit 10 adjusts the tap water pressure to an appropriate level when the tap water is supplied at a pressure higher than a predetermined tap water pressure. As long as the tap water pressure can be adjusted, known techniques such as orifices and valves can be used.

  In addition, the relief valve arranged in the inlet valve unit 10 is used when the tap water unintentionally flows into the inlet valve unit 10 or when a large amount of tap water flows at one time. It has a function of discharging the flowing tap water to the outside of the water purifier 1 without supplying it to the pretreatment unit 20. The relief valve has a structure that works with the raw water solenoid valve so that the relief valve closes when the raw water solenoid valve opens, and the relief valve opens when the raw water solenoid valve closes, or a structure that opens the valve when a certain amount of water pressure is applied. For example, a known method can be used to open and close the relief valve as long as it does not flow into the pretreatment unit 20.

  Moreover, since it can also be set as the valve which designed the said raw | natural water solenoid valve, the pressure-reduction valve, and the relief valve as one valve, the number of parts decreases and a water purifier can be designed more compactly, it is a preferable aspect.

Next, the preprocessing unit 20 will be described.
The pretreatment unit 20 includes a pretreatment cartridge 30 in which the coarse filtering means 31 and the silver impregnated activated carbon 32 are integrally formed, a pretreatment unit container 21 for storing and fixing the pretreatment cartridge 30, and a pretreatment unit It is composed of a lid 22.

  The coarse filtration means 31 has a substantially cylindrical shape, and is fixed to a silver impregnated activated carbon case 34 filled with a silver impregnated activated carbon 32 via a partition plate 33. In the coarse filtering means 31, tap water flows from the substantially cylindrical outer surface toward the inner surface, and plays a role of capturing foreign matters such as iron rust mixed in the tap water. The material is not particularly limited, but polyethylene and polypropylene having excellent chemical resistance and low water absorption are preferably used. Furthermore, if a molded body obtained by three-dimensionally fusing a spunbond nonwoven fabric that does not use an adhesive by heat treatment is used as the rough filtration means 31, there is no fear of elution or dropping. If a depth filter in which the density is changed between the inner layer and the outer layer is used, foreign substances of various sizes can be captured inside the filter, and can be used for a longer period than a filter that captures only the outer surface.

  The filter accuracy of the coarse filtration means 31 is preferably 0.5 to 5 μm, more preferably 0.5 to 1 μm. When the filter accuracy is smaller than 0.5 μm, the filter is clogged in a short period of time, and the flow rate and water pressure of tap water are reduced. On the other hand, if it is larger than 5 μm, the foreign matter cannot be sufficiently removed, and there is a risk of damaging the membrane filtration unit 50 arranged on the downstream side.

  The partition plate 33 has a shape in which a cylinder is coaxially connected on a disk having a circular hole in the center, and a through hole for a flow path is formed in the center. A mesh cloth is integrally formed on one cross-section of the through hole so that the silver-impregnated activated carbon 32 does not move to the rough filtration means 31 side. The outer peripheral surface of the central cylindrical portion is a male screw and is screwed into the inner diameter side of the coarse filtration means 31. The outer peripheral surface of the disk part is also a male screw, and is screwed into the upper part of the silver-attached activated carbon case 34 and fastened. An O-ring for sealing (not shown) is disposed between the partition plate 33 and the silver-attached activated carbon case 34 so that the silver-attached activated carbon 32 does not leak to the outside.

  The silver impregnated activated carbon case 34 has a bottomed shape (with an opening at the center of the bottom) and a substantially cylindrical shape, and an activated carbon holding member 37 is fitted in the opening to close the opening at the center of the bottom. The activated carbon holding member 37 is a molded product in which a mesh cloth is integrally formed. The activated carbon holding member 37 has a function of preventing the silver-impregnated activated carbon 32 from flowing out and allowing water in contact with the silver-impregnated activated carbon 32 to pass through. The partition plate 33 and the activated carbon holding member 37 should be used in combination with known drift prevention means such as providing a plurality of holes and attaching inclined blades to the holes so that the tap water uniformly contacts the silver-impregnated activated carbon 32. Can do.

  The silver-impregnated activated carbon 32 filled in the silver-impregnated activated carbon case 34 has the role of decomposing residual chlorine in tap water, adsorbing organic substances, and further eluting antibacterial silver ions into tap water (function as a first antibacterial unit). )have. By decomposing the residual chlorine, it is possible to prevent the separation membrane from being deteriorated due to the deterioration of the filtration membrane due to the residual chlorine. On the other hand, if residual chlorine is decomposed, bacteria may grow, and biofouling may occur inside the filter membrane element, which may reduce the amount of permeated water. By eluting silver ions having antibacterial properties, it is possible to prevent the growth of bacteria and to prevent a decrease in the amount of permeated water due to biofouling of the filtration membrane element.

  As the silver-impregnated activated carbon 32, it is preferable to use a granular activated carbon made from a cocoon pattern and silver-added. This is because it is available at a relatively low cost and can be filled easily. The activated carbon used here may be activated carbon made of charcoal or phenol resin, etc., which is formed by using a binder by mixing fibrous activated carbon, fibrous activated carbon or granular activated carbon, granular activated carbon or powder Activated carbon obtained by shaping activated carbon into a block shape may be used.

  When the particle size of the silver-impregnated activated carbon 32 is reduced, the ability to decompose residual chlorine is increased, but the water flow resistance is increased. Therefore, it is preferable to select a particle size in the range of 10 to 150 mesh (0.1 to 2.0 mm), and it is more preferable to select a particle size of 48 to 100 mesh (0.15 to 0.3 mm).

  The silver ion concentration in the water after passing through the silver-impregnated activated carbon 32 is preferably 1 μg / l or more and 100 μg / l or less, and it is desirable that the silver ion concentration level can be stably maintained for several months to one year. For this purpose, the silver impregnation amount of the silver impregnated activated carbon 32 is preferably 0.01 to 1% by weight, and more preferably 0.01 to 0.1% by weight. The method for attaching silver ions to the activated carbon is not particularly limited. Examples thereof include a method in which silver nitrate and magnesium nitrate are dissolved in distilled water and uniformly sprayed on activated carbon and then dried. The silver ion concentration is preferably measured by an ICP emission analyzer (inductively coupled plasma emission analyzer) or an atomic absorption method, but other methods may be used.

  The pretreatment container 21 for loading the pretreatment cartridge 30 has a substantially cylindrical shape with a bottom, and the flow path is formed by mounting the pretreatment part lid 22 after the pretreatment cartridge 30 is stored. It is. A pre-processing section inlet 23 and a pre-processing section discharge port 24 are provided at the bottom of the pre-processing section container 21, and tap water flowing from the pre-processing section inlet 23 is separated from the inner wall of the pre-processing section and the pre-processing section. After flowing between the outer walls of the cartridge and reaching the outer peripheral side of the coarse filtration means 31, the coarse filtration means 31 and then the silver impregnated activated carbon 32 flow in this order and are discharged from the pretreatment section discharge port 24. However, the pretreatment cartridge 30 may have a structure (not shown) having a silver impregnated activated carbon 32 on the upstream side and a coarse filtration means 31 on the downstream side. In this case, the fine powder of activated carbon mixed in water is roughly filtered. It can be captured by means 31. Further, a pretreatment cartridge (not shown) having a sandwich structure of the coarse filtration means 31, the silver impregnated activated carbon 32, and the coarse filtration means 31 may be used.

  An annular packing 36 is disposed around the central pretreatment section discharge port 24 at the center of the inner bottom of the pretreatment section container 21, and tap water entering from the pretreatment section inlet 23 and the pretreatment section discharge opening 24. So that it does not mix with the pretreatment water discharged from the water.

  A check valve 25 is provided on the member on the pretreatment section inlet 23 side so that foreign matter does not flow back into the water pipe 4 when there is some misoperation. The check valve 25 may be attached to the pretreatment cartridge 30 side. The lid 22 of the pretreatment unit is detachably fixed to the pretreatment unit container 21 via an O-ring (not shown). The fixing method may be a screw fixing type such as a metric screw or a trapezoidal screw, or a bayonet type. When these fixing methods are used, the pretreatment section lid 22 can be removed with a slight force, so that the cartridge can be easily replaced without contaminating the inside or the periphery of the water purifier with water.

  Since the pretreatment cartridge 30 is a water purification cartridge in which the coarse filtration means 31 and the silver impregnated activated carbon 32 are integrally attached, the rough filtration means 31 and the silver impregnated activated carbon 32 can be easily exchanged in one operation. it can. In the case where the lifespan of the coarse filtration means 31 and the silver-impregnated activated carbon 32 is remarkably different, the coarse filtration means 31 and the silver-impregnated activated carbon 32 may be unitized and replaced independently. In this case, each of the coarse filtration means 31 and the silver impregnated activated carbon 32 can be used until the end of its life.

  Next, the raw water flow rate sensor 40 disposed in the middle of the flow path from the pretreatment unit 20 to the membrane filtration unit 50 will be described.

  As shown in FIG. 10, the raw water flow rate sensor 40 includes an impeller 41 having a built-in magnet 42 and a magnetic switch 43. When the impeller 41 rotates once, two pulse signals are sent from the magnetic switch 43 to the control unit 200. Since it is an impeller-type flow meter, it can be installed without greatly increasing the diameter of the flow path, and space saving can be realized. However, a flow rate sensor other than the impeller type, such as a differential pressure type, a float type, or a non-contact type, may be used. Since the raw water flow rate sensor 40 is disposed on the downstream side of the pretreatment unit 20, it is possible to accurately measure the flow rate without large foreign matter flowing in.

  Next, the membrane filtration unit 50 will be described.

  The membrane filtration unit 50 includes a filtration membrane element 60 in which any one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, and a reverse osmosis membrane is incorporated so that the membrane can be filtered. It is comprised from the membrane filtration part container 51 and the membrane filtration part cover 52 for inserting and fixing. This membrane filtration part container (main body) 51 is installed inside the water purifier main body, and its lid 52 is detachably disposed on the upper part of the container (main body) 51. A resin molded product is used for the container (main body) 51 and its lid 52.

  The structure of a filtration membrane element 60 that is incorporated in a flat membrane-like filtration membrane spiral is illustrated in FIGS. In this case, the permeated water flow path material 63 is sandwiched inside the filtration membrane 61 which is folded in a bag shape with the filtration function layer (consisting of an aromatic polyamide composite membrane or the like) facing outward, and the two sides where one end becomes a crease are bonded. Spiral type with spiral structure wound around the water collection pipe 64 while preparing one or a plurality of sealed ones (referred to as leaves) with the raw water channel material 62 sandwiched between the leaves Is an element. The spiral element can collect the flat membrane-like filtration membrane 61 in a compact manner, and is easy to handle such as replacement. Besides the spiral type, a tubular type element and a plate and frame type element can be used. Moreover, what is necessary is just to use it as a module form bundled in a U-shape or an I-shape, when it uses the filtration membrane of a hollow fiber membrane form and was enclosed in the housing | casing.

  As the filtration membrane 61, any one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, and a reverse osmosis membrane is used. Reverse osmosis membranes and nanofiltration membranes have the advantage that dissolved ions in raw water can be selectively removed depending on the charged state of the membrane surface. On the other hand, microfiltration membranes and ultrafiltration membranes have the advantage that they can be fractionally filtered by the pore size on the membrane surface and the network structure inside the membrane.

  Since the reverse osmosis membrane applies a pressure higher than the osmotic pressure according to the concentration of the raw water, the dissolved ions in the raw water can be hardly permeated and the water molecules can be filtered, so 95 to 99 of the dissolved ions in the raw water. .8% can be removed. The raw water to be filtered can range from a tap water level of about 100 mg / l to a seawater level of about 3.5 to 4.5%, and can be applied to membrane filtration of various types of raw water. be able to.

On the other hand, the nanofiltration membrane has the property that ions are easier to pass than the reverse osmosis membrane. In particular, monovalent ions having a small ion radius are likely to pass through, and divalent or higher-valent ions generally have a desalination rate equivalent to that of a reverse osmosis membrane. For example, when the raw water having a NaCl concentration of 500 mg / l is subjected to membrane filtration at an operating pressure of 0.5 MPa, the desalting rate is 10 to 93%. In addition, when raw water containing CaSO ₄ as divalent ions at a concentration of 1000 mg / l is subjected to membrane filtration at an operating pressure of 0.5 MPa, the desalting rate is 90 to 99%. The desalting rate refers to the rate (%) at which dissolved ions in the raw water are removed.

  As a reverse osmosis membrane or a nanofiltration membrane, a flat membrane having a functional layer made of an aromatic polyamide is preferable because stable desalting performance and fresh water generation ability are obtained in a wide pH range, and storage is easy. . As the resin constituting the functional layer of the filtration membrane, cellulose acetate, aliphatic polyamide, polyvinyl alcohol, polyethersulfone and the like can be used besides aromatic polyamide.

  The ultrafiltration membrane is a membrane having fine pores with a pore size of about 0.01 μm on the membrane surface, and a substance larger than the pore size is supplemented by the pores and network structure of the membrane and has a fractional filtration function. With ultrafiltration membranes, it is possible to fractionally filter bacteria, viruses, and about 1 to 1 million polymers.

  On the other hand, the microfiltration membrane is a membrane having a pore size larger than that of the ultrafiltration membrane and having a pore size of about 0.1 μm. Since the pore size is larger than that of the ultrafiltration membrane, the substances that can be captured are mainly turbidity and bacteria, but there is an advantage that a large amount of water that can be filtered can be obtained.

  The ultrafiltration membrane and the microfiltration membrane are manufactured using materials such as polysulfone, polyethylene, polypropylene, polyvinylidene fluoride, and polyvinyl chloride, and can take the form of a flat membrane or a hollow fiber membrane.

  Depending on the state of the raw water supplied to the water purifier, the membrane to be used can be selected as appropriate, but the nanofiltration membrane should be used because it can selectively remove dissolved substances and easily adjust to the target water quality. Is preferred.

  By utilizing the selective removal ability of nanofiltration membranes and setting the desalting rate of monovalent ions within the range of 10 to 93%, divalent mineral components such as calcium ions and magnesium ions in tap water are membranes. It can be left in water moderately. When the desalination rate is 10% or less, ionic components in tap water can hardly be removed. Conversely, when the desalination rate is 93% or more, ionic components are almost removed. The balance of the desalting rate between monovalent ions and divalent or higher valent ions can be variously adjusted according to the characteristics of commercially available filtration membranes. As an example, when the dissolved ion concentration is low and clear tap water or the like can be used as raw water, the desalting rate of the filtration membrane may be low, and a desalting rate of 10 to 40% is preferable. When well water or the like is used as raw water, it is preferable to use a filtration membrane having a high desalination rate in consideration of safety. For example, a filtration membrane having a desalination rate of 70 to 93% is preferable. When general tap water is used as raw water, it should be a desalting rate of 40 to 70%, preferably 50 to 60%. In addition, the range of the desalination rate can be appropriately selected according to dissolved components and turbidity in the raw water.

  As the raw water flow path material 62, a molded product of a lattice-like thin plate made of polyethylene (PE) is used, and tap water can be diffused throughout the filtration membrane 61 by the mesh opening (pitch). The thickness of the raw water channel material 62 is preferably about 0.5 to 2 mm. If it is too thin, such as 0.5 mm or less, the water flow resistance increases, and it becomes difficult for tap water to diffuse throughout the filtration membrane. On the other hand, if the thickness is too thick, such as 2 mm or more, the element diameter increases and the entire water purifier may be increased in size. In addition to polyethylene, any material such as polypropylene (PP) that has little elution and can be easily molded and can be obtained at low cost may be used.

  As the permeated water channel material 63, a sheet-like material having an uneven groove made of polyester (for example, a sheet-like material based on a polyester fiber tricot knitted fabric or the like) is used. This permeate flow path material 63 is for ensuring a water passage space so that the permeate filtered through the nanofiltration membrane 61 can flow between the flat nanofiltration membranes. Easy to collect in the water collection pipe 64. The thickness of the permeated water channel material 63 is preferably about 0.5 to 2 mm, as with the raw water channel material 62.

  As the water collecting pipe 64 disposed in the filtration membrane element 60, a pipe made of Noryl resin having a plurality of water collecting holes on the side surface of the cylindrical pipe is used. The material of the pipe may be acrylonitrile butadiene styrene resin (ABS resin), polypropylene resin (PP), or the like as long as it can be processed easily with little elution, even if it is not Noryl resin.

  In order to prevent the permeated water flowing inside the water collection pipe 64 from being mixed with the pretreatment water or the concentrated water, on the outer periphery in the vicinity of the end of the pipe corresponding to the connection part with the membrane filtration part container 51 and the membrane filtration part lid 52 described later, One or a plurality of grooves are provided so that a seal member 66 such as an O-ring can be attached. Alternatively, a stopper that prevents permeate from flowing into the inlet 53 may be formed integrally with the water collecting pipe 64 inside the pipe near the end connected to the inlet 53 of the membrane filtration part container 51.

  The filtration membrane element 60 is housed in a membrane filtration part container 51 having a substantially cylindrical shape with a bottom, and is further used with a membrane filtration part lid 52 attached.

  An inlet 53 having a tube fixing hole capable of fitting and fixing the water collecting pipe 64 of the filtration membrane element 60 is provided at the bottom of the membrane filtration part container 51, and a concentrated water outlet 54 is provided at the side face. Furthermore, a step for arranging a ring-shaped sealing member 65 attached to the outer periphery of the filtration membrane element described later at a predetermined position is provided below the concentrated water outlet 54 in the inner wall of the membrane filtration unit container 51. It has been. The inner diameter of the step is crushed by the seal member 65 so that when the seal member 65 is disposed at a predetermined position, the pretreatment water and the concentrated water can be separated from each other inside the membrane filtration unit container 51. It has an inner diameter. The degree to which the seal member 65 is crushed is standardized by the outer diameter or inner diameter, the cross-sectional shape and the cross-sectional size of the seal member 65. This seal member is arranged at a predetermined position and fulfills a seal function for separating raw water and concentrated water.

  A permeate outlet 55 and a permeate outlet 55 are connected to the upper part of the membrane filtration part lid 52, and the water collecting pipe 64 of the filtration membrane element 60 provided inside the membrane filtration part lid 52 is fitted and fixed. Tube fixing holes are respectively provided. Moreover, it is being fixed to the membrane filtration part container 51 so that attachment or detachment is possible via sealing members 66, such as an O-ring. As a fixing method with the membrane filtration part container 51, a fixing method such as a screw fixing type such as a metric screw or a trapezoidal screw or a bayonet type can be used. When these fixing methods are used, the pretreatment section lid 22 can be removed with a slight force, so that the filtration membrane element 60 can be easily replaced without contaminating the inside or the periphery of the water purifier with water.

  A seal member 65 is attached to the outer periphery of the filtration membrane element 60 without being fixed to the outer periphery of the filtration membrane element 60 so as not to mix the pretreated water and the concentrated water. As the material of the sealing member 65, rubber suitable for food use such as ethylene-propylene-diene rubber (EPDM) and acrylonitrile butadiene rubber (NBR) is preferably used. The cross-section of the seal member 65 is not particularly limited as long as it can be reliably sealed, such as a substantially circular O-ring, a V-shaped V packing, or a U-shaped U packing. Among these, an O-ring having a substantially circular cross section, which can be purchased at a low cost and can be easily sized, is preferable.

  In a state where the membrane element is housed in the membrane filtration unit container and the membrane filtration unit lid is fitted, the lower end of the membrane filtration lid is fitted inside the membrane filtration unit container, and the membrane filtration vessel A seal member 65 is disposed in a ring-shaped space between the stepped portion on the inner peripheral surface on the upper side, the lower end portion of the membrane filtration lid, and the outer periphery of the filtration membrane element. By disposing the member 65, it plays a role of a sealing function for separating the raw water and the concentrated water. When raw water and concentrated water are mixed, the concentration of the raw water increases, which causes a problem that the permeated water concentration increases or the osmotic pressure increases and the permeated water amount decreases. In order to prevent this point with certainty, it is preferable that sealing can be performed reliably. When the filtration membrane element 60 is extracted from the membrane filtration section container 51, if the seal member 65 is fixedly attached to the outer periphery of the filtration membrane element 60, the seal member 65 and the inner wall of the membrane filtration section container 51 are in a wet state. The slippage is bad, and it takes a lot of labor to extract. Furthermore, when the new filtration membrane element 60 that has been replaced is stored, a large resistance is generated due to the friction between the seal member 65 and the inner wall, and a great force is applied to the storage. There is a risk of damage such as coming off. In order to prevent such breakage, the seal member 65 is preferably not fixed to the outer periphery of the filtration membrane element 60.

  When the membrane member 60 is housed in the membrane filtration part container 51 without fixing the sealing member 65 to the outer periphery of the membrane element 60, the membrane element 60 can be smoothly inserted into the membrane filtration part container 51. That is, after inserting the filtration membrane element into the membrane filtration unit container with the ring-shaped sealing member arranged in an unfixed state on the outer periphery of the filtration membrane element, the membrane filtration unit lid is fitted, and the membrane filtration unit container and When the membrane filtration part lid is fixed, the seal member 65 is a predetermined position that is a ring-shaped space generated between the step provided on the inner wall of the membrane filtration part container 51 and the end of the membrane filtration part lid 52. And can serve as a sealing function for separating the pretreated water and the concentrated water.

  The filtration membrane element 60 can have various performances depending on the type of filtration membrane to be incorporated, the filtration performance (desalting rate, etc.), the amount of filtered water, and the like. Therefore, the type of the filtration membrane element 60 attached to the membrane filtration unit can be appropriately selected depending on the quality of raw water to be treated. Therefore, an identification means (not shown) for identifying the type of the filtration membrane element 60 attached to the membrane filtration unit is provided in the filtration membrane element 60. As the identification means, for example, a filtration membrane element using a filtration membrane with a high desalting rate is provided with a projection at one end of the water collection pipe, and the projection presses an identification switch provided on the membrane filtration unit container 51. You may employ | adopt the system which a contact is closed, the signal is transmitted to the control part 200, and it is displayed that the high membrane filter element of a high desalination rate is attached. As the identification means, not a protrusion but a notch or unevenness may be used, and in addition, an IC chip, magnetic information, barcode, character information, etc. may be used, and any method can be used.

Next, the constant flow valve 70 will be described.
The constant flow valve 70 provided on the downstream side of the concentrated water outlet 54 of the membrane filtration unit has a flow rate throttle mechanism inside and functions so that concentrated water of a certain amount or more does not flow out. With this constant flow valve 70, the concentrated water can be maintained below a certain amount even if the raw water flow rate increases. The constant flow valve 70 used here may be a constant flow valve having a pressure adjustment function such as a valve, but a throttle valve that does not require adjustment is preferably used.

  Next, the concentrated water flow sensor 80 will be described.

  As with the raw water flow sensor 40 described above, the concentrated water flow sensor 80 includes an impeller with a built-in magnet and a magnetic switch. When the impeller rotates once, the pulse signal is sent from the magnetic switch to the control unit 200 by two pulses. A flow sensor structured to be sent is used. Since it is an impeller-type flow meter, it is the same as the raw water flow sensor 40 that the flow path can be installed without significantly increasing the diameter. By subtracting the pulse number of the concentrated water flow rate sensor 80 from the pulse number transmitted from the raw water flow rate sensor 40, the flow rate of the permeated water can be calculated. Based on the value of the calculated permeate flow rate, the antibacterial function of the second antibacterial unit 90 described later can be controlled.

  Next, the tank 100 for storing the permeated water obtained by membrane filtration will be described.

  The tank 100 stores the permeated water obtained by membrane filtration after passing through a second antibacterial unit 90 described later and containing silver ions. The tank 100 includes a tank body 101, a tank lid 102, and a tank lid support member 103. A portion of the tank lid 102 and the tank lid support member 103 is recessed, and a chamber 93 is disposed outside the tank. Permeated water containing silver ions is placed in the recessed portion of the tank lid 102. A chamber outlet 94 for allowing the permeated water containing silver ions to flow in is provided in the recessed portion of the tank lid support member 103 for the chamber outlet 95 for allowing it to flow out.

  There is a tank spout 130 at the bottom of the tank body 101, and the permeate discharged from the tank spout 130 is supplied to the outside of the water purifier 1 by a spout pump 140 installed at the bottom of the water purifier 1. A water level sensor 110 is provided inside the tank.

  The tank body 101, the tank lid 102, and the tank lid support member 103 are all molded bodies made of ABS resin that can be molded accurately with little elution. The tank body 101, the tank lid 102, and the tank lid support member 103 are fixed to each other by screwing or fitting, and the user removes the tank lid support member 103 and the tank lid 102 as necessary. Thus, the inside of the tank body 101 can be cleaned. The material of the tank is not limited to the ABS resin, but may be any resin that has little elution into the permeated water. For example, acrylic resin represented by acrylonitrile resin (AS resin), polystyrene, polycarbonate, polypropylene resin (PP resin) Polymethyl methacrylate, norbornene resin, polysulfone, polyethersulfone, polyetherimide, cyclic olefin copolymer and the like may be used. The tank body 101, the tank lid, and the tank lid support member 103 preferably have a white color or the like that hardly accumulates heat. As will be described later, when a part or the whole of the tank body 101 is made transparent, the amount of permeated water remaining in the tank body 101 can be visually recognized from the outside. At this time, an antibacterial coating such as silver ions may be applied to the inside of the tank body 101, the tank lid 102, and the tank lid support member 103, or an antibacterial resin composition in which an antibacterial agent containing silver ions is kneaded into the resin. Forming an article into a tank makes it difficult for bacteria to propagate inside the tank body 101, which is a preferable aspect in terms of hygiene.

  The shape of the tank body 101 (that is, the shape of the water storage portion) is a shape having two concave portions as shown in FIGS. 8A and 8B, and two corners of a substantially square shape in the horizontal section. Each of the portions has a substantially T-shaped shape by notching the recesses. In this tank shape, two concave portions are provided at left and right symmetrical positions of the tank, and a substantially vertically long pre-processing unit 20 is provided on one side of the concave portion, and a substantially vertically long membrane filtration unit 50 is provided on the other side in a vertically long direction. Can be arranged. That is, since it is set as such a shape, the pre-processing part 20 and the membrane filtration part 50 can each stand in two recessed parts, and the installation area of the water purifier 1 can be restrained.

  The water storage capacity of this tank may be an optimal capacity depending on the purpose of use of the water purifier and the overall size of the water purifier, but for example, in the case of a water purifier using a kitchen in the home, What is necessary is just to be about 3-12 liters. In a standard family of four, the average amount of water used for one cooking is said to be about 4-5 liters, and the storage capacity of a tank that can secure this amount of water is preferred. A more preferable water storage capacity is about 5 to 10 liters.

  On the outer periphery of the recess of the tank body 101, a fixture 120 for fixing the container 21 of the pretreatment unit 20 fitted and installed in the recess, and a fixture for fixing the container 51 of the membrane filtration unit 50 121 is provided. Even when the pretreatment unit lid 22 and the membrane filtration unit lid 52 are opened and the pretreatment cartridge 30 and the filtration membrane element 60 are replaced, the pretreatment unit container 21 and the membrane filtration unit container 51 are not detached from the tank body 101. Exchange work can be easily performed.

  Moreover, if all or a part of the side surface of the substantially T-shaped tank is made transparent and the tank is arranged in the vicinity of the front surface of the water purifier so that the transparent portion can be visually recognized from the outside, The water level inside the tank body 101 can be directly visually recognized from the outside. For example, as shown in FIGS. 1, 3, and 4, a water level display window 3 that can know the water level of purified water in the tank may be provided on the front plate 2 of the water purifier. This water level display window 3 is a transparent window for visually recognizing the water surface position of the purified water inside the tank body 101, and includes ABS resin, acrylic resin, polystyrene, polycarbonate, PP resin, polymethyl methacrylate, norbornene resin, polysulfone, It is preferable to use a transparent resin such as polyethersulfone, polyetherimide, and cyclic olefin copolymer. Instead of the transparent window, an opening (not shown) may be provided. The transparent window or opening is preferably in the form of a vertically long slit that covers from the full water level of the tank to the vicinity of the water level.

  Further, instead of the transparent window and the opening, a display member that varies in conjunction with the water level is provided inside the tank body 101, or an opening is provided in a part of the front plate 2 in accordance with the transparent portion of the tank body 101. May be. Furthermore, you may provide the scale which can grasp | ascertain the water amount which remains in a 1 liter unit in the transparent part of the tank main body 101 corresponding to a transparent window or an opening part. The scale is not limited to 1 liter, and may be a scale obtained by dividing 1 liter into 2 to 5 equal parts. In addition to the liter, a unit of volume according to the country to be used can be appropriately adopted.

  The water level sensor unit 110 for detecting the water level in the tank is provided with four sensors of an HH sensor 111, an H sensor 112, an L sensor 113, and an LL sensor 114 in order from above the tank. It is possible to know the relative water level compared to the predetermined range. Each of these sensors uses a sensor that detects the water level by utilizing reflection of light. These sensors are preferably provided inside the tank so that the water level in the tank can be directly measured. If four floats are used in the tank, the water level can be detected directly. Alternatively, a method may be used in which a pipe having a light transmitting part and a receiving part in the tank is provided in the tank, and the water level is detected by utilizing the reflection of light or measuring the refractive index.

  The permeated water discharged from the tank outlet 130 at the lower part of the tank is sent to the purified water outlet 144 provided at the upper part of the main body of the water purifier 1 by the water discharge pump 140, and discharged from the purified water outlet 144 to the outside. While water is not discharged from the purified water discharge port 144, the permeated water staying in the pipe line 141 that supplies the permeated water is inhibited from breeding bacteria due to the added silver ions. In addition, even if bacteria may invade from the purified water outlet 144, the contaminated permeated water is permeated by the check valve 142 provided in the middle of the pipeline between the water discharge pump and the purified water outlet 144. The water does not flow back into the pipe for supplying water, and the quality of the permeated water can be kept safe without bacteria growing in the permeated water pipe or inside the tank 100.

  This check valve preferably has a function that does not open even when a pressure of 0.01 MPa is applied from the water outlet side. For example, the check valve has a structure constituted by a valve seat, a valve body, and a spring. The valve seat and the valve body may be a resin molded body composed of a resin containing an antibacterial agent. When a resin containing an antibacterial agent is used, water staying inside the check valve 142 and bacterial growth in the vicinity of the check valve can be prevented.

  If the installation location of the water purifier outlet 144 is positioned above the upper limit position of the water surface in the water storage section 100, the purified water staying in the pipe supplied to the water purifier outlet 144 can be prevented from flowing back to the water storage section. It is preferable at a point, for example, should just be provided in the upper part of water purifier 1 main part.

  The water discharge pump 140 supplies the permeated water to the purified water outlet 144 in response to the operation signal of the permeated water discharge command. The type of the pump is not particularly limited, and a water supply pump by a known method can be used.

  The overflow pipe 160 provided at the upper position of the tank 100 is configured such that when the permeated water level in the tank becomes higher than the position of the HH sensor 111, the excess permeated water passes through the overflow pipe 160 to the drain port 71. It has a function of flowing out and lowering the water level in the tank to the HH sensor 111 position. In addition, when the inside of the tank 100 is washed, an overflow pipe can be used to drain excess permeated water or water used for washing to the drain port 71, and the safety inside the tank 100 is improved. Help to keep.

  Next, the 2nd antibacterial unit part 90 is demonstrated. The second antibacterial unit section 90 is for adding silver ions having an antibacterial action to the permeated water obtained by membrane filtration in a predetermined concentration range and feeding the water to the tank 100 described above.

  A cross-sectional view of the second antibacterial unit 90 is shown in FIG. The second antibacterial unit 90 includes a silver electrode 91 that elutes silver ions, a chamber 93 in which a part of the tank lid 102 and the tank lid support member 103 is recessed, and a recessed portion of the tank lid support member 103. A chamber inlet 94 provided, a chamber outlet 95 provided in a recessed portion of the tank lid 102, a connecting pipe 96, a cap 97, a scale prevention filter 98 downstream of the silver electrode 91, and an electric conductivity meter 99 are disposed. Has been.

  The chamber 93 is a substantially rectangular parallelepiped space provided by recessing part of the tank lid 102 and the tank lid support member 103, and the portion where the tank lid support member 103 is recessed is located above the substantially rectangular parallelepiped of the chamber 93. The half of the chamber 93 is provided with a corresponding recess in the lower half of the substantially rectangular parallelepiped. In addition, the connection portions of the recesses are fixed with an O-ring or the like so that water does not leak. A silver electrode 91 described later can be installed in this space, and silver ions can be added to the permeated water.

  A tubular chamber inlet 94 through which permeated water flows is formed integrally with the tank lid support member 103 at a portion where the tank lid support member 103 is recessed. Here, the chamber inlet 94 protrudes substantially vertically downward of the chamber 93.

  In addition, a tubular chamber outlet 95 for sending permeated water added with silver ions to the tank 100 is formed integrally with the tank lid 102 at the recessed portion of the tank lid 102 and protrudes substantially vertically upward of the chamber 93. ing. Since the lower end of the chamber inlet 94 is provided below the upper end of the chamber outlet 95, the permeated water that has flowed into the chamber 93 has a substantially constant amount of permeated water until it reaches the upper end of the chamber outlet 95. No. 93 is accumulated.

  A connecting pipe 96 for connecting to the permeate outlet 55 of the membrane filtration unit 50 is inserted into the chamber inlet 94 through which the permeate filtered through the membrane flows. A sealing member (not shown) is attached to the connection pipe 96 so that permeated water does not leak from the chamber inlet 94. The connecting pipe 96 is provided with a hook (not shown) so that the connecting pipe 96 is not detached from the chamber inlet 94, and the cap 97 has a hook (not shown) clamped and fixed. .

  The silver electrodes 91 are arranged so as to face each other with two plate-like silver electrodes as a pair. The material of the silver electrode 91 may be silver alone, or in addition to that, an alloy of silver and copper, an alloy of silver and zinc, etc. may be combined with another metal that is a source of antibacterial metal ions. An alloy may be used.

  The silver electrode 91 is integrally joined to the tank lid support member 103 at a portion constituting the chamber 93 in which a part of the tank lid support member 103 is recessed. A part of the silver electrode 91 protrudes upward from the chamber 93, and the protruding connection portion 92 can be connected to the control portion 200 described later.

  By applying a voltage based on a signal from the control unit 200 described later to the silver electrode 91, silver ions are eluted in the permeated water. At this time, if the anode side and the cathode side of the pair of silver electrodes are fixed, a silver chloride scale is generated on the anode side, and the silver ion elution amount gradually decreases. In order to prevent the occurrence of scale, it is preferable to periodically reverse the polarity of the voltage applied to the silver electrode with a period of about 1 to 10 seconds. When applied with the same polarity for 10 seconds or more, a silver chloride scale is deposited on the silver electrode on the anode side, and the silver chloride precipitate peeled off from the silver electrode may be mixed into the permeated water. In order to prevent the silver chloride scale from flowing into the tank 100, a scale prevention filter 98 that captures the silver chloride scale may be installed on the downstream side of the silver electrode 91.

  As the scale prevention filter 98, a molded product obtained by integrally molding a mesh cloth, or a spunbond nonwoven fabric that uses polyethylene or polypropylene with excellent chemical resistance and low water absorption as a material and does not use an adhesive is suitably used. .

  An electric conductivity meter 99 may be installed on the upstream side of the silver electrode 91 to measure the resistance (conductivity) of the permeated water and send the result to the control unit 200. As long as the electrical conductivity meter 93 is of a size that can measure the electrical resistance of water online, a known electrical conductivity meter can be used regardless of the measurement method.

  Since the silver electrode 91 is attached so that it can be removed from the second antibacterial unit 90, it can be exchanged when a scale adheres to the silver electrode or when a certain amount of silver ions is eluted.

  Here, the silver ion concentration of permeated water will be described.

  Although the silver ion concentration of permeated water is not a management item in Japanese tap water quality, the WHO (World Health Organization) guideline states that it is desirable to set it to 100 μg / l or less. Moreover, in the safe drinking water law water quality standard which USEPA (American Environmental Protection Agency) prescribes | regulates below 100 microgram / l same as WHO. In the present invention, in consideration of further safety from this standard, the upper limit value of the silver ion concentration in the permeated water is designed to be 50 μg / l or less, which is half of the standard value.

  On the other hand, the minimum silver ion concentration was designed to be 10 μg / l or more at which the antibacterial effect can be confirmed. When the silver ion concentration is less than 10 μg / l, the antibacterial action against bacteria becomes insufficient, and the bacteria grow by culture. From these findings, the voltage applied to the silver electrode 91 and the application time are adjusted so that the silver ion concentration in the permeated water is in the range of 10 to 50 μg / l. As a means for this adjustment, a program in the control unit 200 is used.

Next, the control unit 200 will be described.
As illustrated in FIG. 14, the control unit includes a power supply unit display unit, a display unit, an operation button unit, and a calculation unit.

  As shown in FIG. 15, the power supply unit includes a battery 211 housed in a battery case 212, and an anode metal fitting, a cathode metal fitting (not shown) provided in the battery case main body 213, and a lead wire 217 are connected to each other. In addition, power is supplied to a display unit 220, an operation button unit 240, and a calculation unit 250, which will be described later, through a lead wire 217.

  Here, one or a plurality of batteries 211 may be used, and an AC power supply may be used instead of the batteries.

  There are various types of batteries 211 such as manganese batteries, alkaline batteries, oxylide batteries, nickel metal hydride or lithium ion type rechargeable batteries, and the display unit 220, operation buttons 240, and calculation unit 250 described later are used for several months. If it can operate stably for more than 1 year, it can be used without particular question.

  A battery case 212 into which the battery 211 is placed includes a battery case body 213 and a battery case cover 214, and an anode fitting and a cathode fitting (not shown) are provided in the battery case body 213. A waterproof member 215 is attached to the outlet of the battery case main body 213 from which the lead wire 217 comes out from the anode metal fitting and the cathode metal fitting so that water does not enter the battery case main body 213 through the lead wire.

  The battery case lid 214 is also provided with a waterproof member such as an O-ring (not shown) at the connection portion with the main body so that water does not enter from the outside of the water purifier 1. The battery case main body 213 and the battery case cover 214 can be attached by a bayonet type, a screw-in type, a plug-in type, or the like. The battery case cover 214 is preferably provided with a groove (not shown) that can be opened with a coin.

  When an AC power supply is used, the voltage is too high to operate the display unit and the calculation unit with the voltage as it is, so the voltage is lowered to about 2 to 12 V using a transformer and directly applied to the silver electrode 91. What is necessary is just to apply. A method for transforming the transformer is not particularly limited, and a publicly known one can be used, but the size is preferably a small one in order to design the water purifier 1 compactly.

  The display part 220 is arrange | positioned collectively in the display part case, and is provided in the position which is easy to see from the user of the upper part or front surface of the water purifier 1 main body. For example, as shown in FIG. 16, a power LED 228, a drain LED 229, a water supply LED 230, a pretreatment cartridge replacement LED 231, a filtration membrane cartridge replacement LED 232, a maintenance LED 233 and the like are arranged in a liquid crystal display unit (LCD) 221. From the LCD 221 and the various LEDs 228 to 233, lead wires 237 connected to a substrate 252 of the arithmetic unit 250 described later are connected. This wire connection portion is sealed with a potting agent for waterproofing so that rust is not generated by contact with water in the main body of the water purifier 1 or contact failure does not occur. The potting agent is preferably a potting agent of urethane resin or epoxy resin, which is a two-component mixed curable resin, but the material is not particularly limited as long as it has waterproof ability.

  The LCD unit 221 includes a display for displaying the state of the water purifier 1. Battery life display 223 when a battery is used as a power source, pretreatment cartridge life display 224 that displays the remaining period until the pretreatment cartridge reaches the end of life, and filtration membrane that displays the remaining period until the filter membrane element reaches the end of its life The element life display 225, the filter membrane element type display 226 for displaying the type of the filter membrane element, and the digital display unit 227 for indicating the integrated flow rate and the instantaneous flow rate of the raw water flow rate sensor 40 and the concentrated water flow rate sensor 80 are respectively provided in the LCD unit 221. Is displayed.

  As shown in FIG. 16, the battery life display 223, the pretreatment cartridge life display 224, and the filter membrane element life display 225 are turned on, turned off, blinked, the blinking cycle is changed, or By combining these, it can be displayed that the life has been reached. For example, in the pretreatment cartridge life display 224 or the filtration membrane element life display 225, when the life is displayed in three blocks, all three blocks are lit at the start of use, and the integrated flow rate reaches 80% of the set life. One block is turned off, the second is turned off at 90%, and when 100% is reached, all are turned off and the frame surrounding the block is blinked. Even a display method other than this can be selected as appropriate as long as the user can recognize that the lifetime has been reached in stages.

  The filtration membrane element type display 226 only needs to detect the identification signal of the identification unit 56 provided in the membrane filtration unit container 51 and to display the result on the LCD unit 221.

  In addition, a backlight can be provided on the back surface of the LCD portion 221. The backlight may continue to be lit during operation, may be lit only when a water supply operation or drainage operation is performed, or may be lit for a certain period of time after operating an operation button to be described later. Also good.

  In order to produce the lighting effect of the backlight, the LCD portion 221 is made transmissive, and a light diffusing member having a plurality of irregularities on the surface is provided between the LCD portion 221 and the backlight.

  In order to suppress the power consumption, a method in which the backlight is not lit constantly, but is lit for a certain period of time from when the operation button is operated, or is lit periodically is preferable. Further, when the pretreatment cartridge 30 or the filtration membrane element 60 approaches or reaches the end of its life, the color of the backlight may be changed to alert the user. For example, in normal use, the backlight may be displayed in green, and when the pretreatment cartridge 30 or the filtration membrane element 60 reaches the end of its life, it may be changed to an orange display and blinked. Of course, the color of the backlight may be other than the exemplified colors, and a method of changing the blinking cycle is also a preferable mode.

  The operation button part 240 is provided in the position which is easy to operate from a user in the water purifier 1 main body upper part or the front surface. For example, as shown in FIG. 17, the operation button unit 240 includes a power button 241, a drain button 242, a water supply button 243, and a reset button 244 arranged in the operation button unit area. A substrate is housed in the operation button area, and the operation of each button 241 to 244 is converted into a signal, and the signal is transmitted to the arithmetic unit 250 described later via a lead wire. The button may use any method such as a mechanical push-in type, feather touch, touch panel, or the like. Buttons are frequently used, and those excellent in durability and waterproofness are preferable. As an example, it is preferable to use a feather touch type button in that there is no gap for water to enter from the periphery of the button. When the push button type is adopted, it is preferable to cover the switch rubber for waterproofing.

  The substrate is preferably disposed inside the operation button area and sealed with a potting agent for waterproofing, similar to the display unit 220 described above. The potting agent is preferably a potting agent of urethane resin or epoxy resin, which is a two-component mixed curable resin, but the material is not particularly limited as long as it has waterproof ability.

  If the reset button 244 is accidentally pressed during operation, an accurate life display cannot be performed. Therefore, the reset button 244 can be operated with a long press of 3 seconds or more, or provided separately from the operation button 240. You may decide.

  As shown in FIG. 18, the calculation unit 250 includes a substrate 252 provided with a CPU 251 and a calculation unit case 253 that stores the substrate 252.

  The CPU 251 receives power supply from the power supply unit 210, performs calculations based on pulse signals from the raw water flow rate sensor 40, the concentrated water flow rate sensor 80, the water level sensor 110, and an operation signal from the operation button 240, or a membrane filtration unit. The output time for displaying the type of the filtration membrane element identified by the signal from the identification unit 56 provided in 50 on the display unit 220, or the elapsed time since the pretreatment cartridge 30 or the filtration membrane element 60 is attached. Measurement is performed. The CPU 251 and the substrate 252 are housed in the calculation unit case 253 and sealed with a potting agent 254 for waterproofing. The potting agent 254 is preferably a potting agent of urethane resin or epoxy resin, which is a two-component mixed type curable resin, but the material is not particularly limited as long as it has waterproof ability. The power supply from the power supply unit 210, the signal from the operation button 240, and the output signal to the display unit 220 are connected to each other by lead wires.

  In addition, a memory function is provided in the calculation unit 250 to store the calculated integrated flow rate and instantaneous flow rate, the type of the filtration membrane element, the elapsed time since the pretreatment cartridge and the filtration membrane element were attached, and the like. Can do. Further, when the life varies depending on the type of the identified filtration membrane element, a signal is sent to the CPU 251 for a life setting value for displaying the life from the identification result, and the calculated integrated flow rate is compared with the life setting value to filter the LCD 221. The membrane element life display 225 can be accurately displayed.

Next, an operation (operation) performed by the control unit 200 will be described.
The operation of the control unit will be described in the order of drainage operation, fresh water generation operation, water supply operation, flow rate data processing, and silver electrode control.

  First, drainage operation will be described.

  When the power outlet of the water purifier 1 is connected and turned on, when the water level of the permeated water remaining in the tank 100 is equal to or lower than the LL sensor 114, the raw water electromagnetic valve 11 is closed, the drain electromagnetic valve 150 is opened, The water discharge pump 140 is operated, and the permeate remaining in the tank 100 is forcibly drained from the drain port 71 (hereinafter, this operation is referred to as a drain operation state). Thereafter, when the power button 241 on the operation panel 240 is pressed for 3 seconds or longer, the water purifier 1 enters a normal operation state. The switch is turned on by the key switch process, and the opening / closing of the upper lid 4 of the water purifier 1 is confirmed. Here, when the upper cover 4 is open, it is considered that the pretreatment cartridge 30 or the filtration membrane element 60 is being replaced, and the drain LED 229 and the maintenance LED 233 on the display unit 220 are turned on. However, when the upper lid 4 is closed within 10 seconds, the normal operation state is restored.

  The drainage operation is performed in the following cases. When draining manually, if the drain button 242 on the operation button 240 is pressed for 3 seconds or longer, the drain operation state described above is entered, and the permeate remaining in the tank 100 is drained. Further, when the water supply operation is not continuously performed for 48 hours or more, the timer provided in the control unit 200 forcibly enters the drain operation state, and the permeate remaining in the tank 100 is drained.

Next, the fresh water generation operation will be described.
The fresh water generation operation is not performed when the water level of the permeated water in the tank 100 is above the H sensor 112, and when the water level falls below the H sensor 112, the raw water electromagnetic valve 11 is opened to start fresh water generation. When the water reaches the HH sensor 111, the raw water electromagnetic valve 11 is closed to finish the water production. When the water level drops below the LL sensor 114 by discharging a larger amount of permeated water than the amount of water produced, the operation of the water discharge pump 140 is stopped until the water level recovers to the L sensor 113 position.

Next, the water supply operation will be described.
In the water supply operation, when the water supply button 243 in the operation button 240 is pressed once, the water discharge pump 140 is operated to continuously supply the permeated water in the tank to the purified water discharge port 144, and the water supply button 243 is pressed again. Press to stop water supply. A method of supplying water only when the water supply button 243 is continuously pressed may be used.

  Next, flow rate data processing will be described.

  When tap water passes through the raw water flow sensor 40 or concentrated water passes through the concentrated water flow sensor 80, the impeller incorporated in each flow sensor rotates, and the generated pulse signal is sent to the control unit 200. Sent and processed. The result of the arithmetic processing is stored in a memory unit built in the control unit 200. Based on the data stored in the memory unit, the replacement timing of the pretreatment cartridge 30 and the filtration membrane element 60 is determined, and a display for prompting replacement is displayed on the display unit 220. Hereinafter, a method for determining each replacement time will be described.

  First, a method for replacing the pretreatment cartridge 30 will be described.

  When the integrated flow rate that has passed through the raw water flow rate sensor 40 exceeds a predetermined value (eg, 3,000 L), or when the instantaneous flow rate is below a predetermined level (eg, 200 ml / min) for 3 minutes, the pretreatment cartridge 30 Is reached, and the pretreatment cartridge replacement LED 231 on the display unit 220 is turned on. When the pretreatment cartridge replacement LED 231 is turned on, it can be known that the replacement time has come. After the manual drainage operation described above is performed before replacement, the upper cover 4 of the water purifier 1 is opened and it is confirmed that the drainage LED 229 is turned off, and then the pretreatment section lid 22 is opened and pretreatment is performed. Replace the cartridge 30. After the replacement, attach the pretreatment section lid 22 and the upper cover section 4 of the water purifier 1 as they are, press the reset button 244 on the operation button 230, erase the data stored in the memory section, and return to normal operation. Let

  Next, a method for replacing the filtration membrane element 60 will be described.

  When the integrated flow rate that has passed through the raw water flow rate sensor 40 exceeds a predetermined value (for example, 5,000 L), when 1 year (after 8,760 hours) has elapsed since the filtration membrane element 60 was set in the membrane filtration unit 50, Alternatively, when the difference between the instantaneous flow rate of the raw water flow rate sensor 40 and the instantaneous flow rate of the concentrated water flow rate sensor 80 continues for 3 minutes or less, the filter membrane element 60 reaches the end of its service life at that time. The filter membrane element replacement LED 232 in the display unit 220 is turned on. When the filtration membrane element replacement LED 232 is turned on, it can be known that the replacement time has come. Before the replacement, after performing the above-described manual drainage operation, the upper cover 4 of the water purifier 1 is opened, and after confirming that the drainage LED 229 is turned off, the membrane filtration unit lid 52 is opened and the filtration membrane is opened. Replace element 60. After the replacement, attach the membrane filtration part lid 52 and the upper cover part 4 of the water purifier 1 as they are, press the reset button 244 on the operation button 230, erase the data stored in the memory part, and return to normal operation. .

  Here, the integrated flow rate that has passed through the pretreatment cartridge 30 and the filtration membrane element 60 can be displayed on the display unit 220. As a display method, a method of counting down / counting up the lifetime with numbers on the LCD unit 221 or a method of displaying a plurality of blocks by turning off, lighting, flashing, or a combination thereof is used. In addition, it may be possible to make a determination by color using an LED unit of one color or a plurality of colors.

  Next, silver electrode control will be described.

  When silver ions are added to the permeated water, the silver ion concentration in the permeated water is controlled to be in the range of 10 to 50 μg / l based on the explanation of the silver ion concentration described above. Since the chamber 93 can store a substantially constant amount of permeated water, if the flow rate of the permeated water flowing into the chamber 93 is known, the necessary silver ion addition amount per unit time can be determined. In addition, the resistance value (conductivity) of the water temperature and the permeated water is also a factor affecting the concentration of silver ions to be added, so that the measurement result can be fed back to the control unit 200.

  The water purifier according to the present invention transmits silver ions by applying a predetermined voltage (for example, ± 2 V (± 1%)) to the silver electrode 91 in conjunction with the water production operation and eluting the silver ions into the permeated water. It is added in water. The voltage is applied from the + 2V side, and + 2V and -2V are repeated at intervals of 5 seconds. + 2V to -2V is not reversed immediately, and a pause time is provided. During the rest period, the current value flowing 4 seconds after voltage application is measured 5 times at 0.1 second intervals, the permeate resistance value (conductivity) calculated from the average value, the instantaneous flow rate of the raw water flow sensor 40 and the concentration Based on the difference from the instantaneous flow rate of the water flow rate sensor 80, the downtime is determined based on the downtime program incorporated in the control unit 200 in advance. The interval at which the voltage is applied need not be fixed at 5 seconds, and can be appropriately determined within 1 to 10 seconds as described above. In this case, the number of times and the interval at which the current value is measured in order to determine the pause time can also be appropriately determined according to the application interval. In addition to the method of calculating the resistance value of the permeated water from the current value, a method of calculating based on the signal of the electric conductivity meter 93 may be used.

  The silver electrode 91 may be controlled by a method of controlling current instead of applied voltage. When a predetermined current is applied to the silver electrode 91, as in the case where the voltage described above is applied, the rest time during which no current is applied is determined according to the resistance value of the permeated water and the conductivity obtained from the electric conductivity meter 93. Can be provided. Moreover, it is good also as a method of adjusting suitably the time to apply an electric current according to the electrical conductivity obtained from the resistance value of permeated water, or the electrical conductivity meter 93.

  The accumulated flow rate of the permeated water can be calculated from the difference between the accumulated flow rate of the raw water flow rate sensor 40 and the accumulated flow rate of the concentrated water flow rate sensor 80, so that the accumulated flow rate of the permeated water reaches a predetermined value (eg, 3,000 L). In this case, the second antibacterial unit replacement LED 234 in the display unit 210 can be turned on to prompt replacement. Before replacing the second antibacterial unit replacement LED 234, after performing the above-described manual drainage operation, the upper lid 4 of the water purifier 1 is opened, and it is confirmed that the drainage LED 229 is turned off. The second antibacterial unit 90 installed at the top of 100 is replaced. After the replacement, the upper cover 4 of the water purifier 1 is attached as it is, the reset button 244 on the operation button 240 is pressed, the data stored in the memory is erased, and the normal operation is restored.

  According to the water purifier 1 having the above configuration, raw water such as tap water can be subjected to membrane filtration to produce permeated water in which mineral components remain. Further, since the permeated water is subjected to antibacterial treatment by adding silver ions from the second antibacterial unit portion 90, the permeated water while being stored in the tank 100 or stagnant in the pipeline is used. Can prevent bacterial growth. Furthermore, since silver ions are added simultaneously with removing residual chlorine from the raw water (tap water) when passing through the pretreatment cartridge 30, it is possible to prevent bacterial growth in the filtration membrane element 60 or the concentrated water disposed on the downstream side. Can do.

The water purifier of the present invention can also be implemented in the following modified form.
(1) As a method of determining the replacement timing of the pretreatment cartridge 30, a residual chlorine concentration meter is installed on the downstream side of the pretreatment unit 20, and when the residual chlorine concentration reaches a certain value or more, the display unit 210 A certain “pretreatment cartridge replacement” can be lit.
(2) As yet another method for determining the replacement timing of the pretreatment cartridge 30, a pressure sensor is attached before and after the pretreatment unit 20, and when the differential pressure between the two pressure sensors reaches a certain value or more, a display is made. “Replace pretreatment cartridge” in the unit 210 is lit. In addition to the pressure sensor, a differential pressure gauge may be attached.

(3) Measure the instantaneous flow rate of the raw water flow rate sensor 40 or the concentrated water flow rate sensor 80 and, as described above, turn on the LED that prompts replacement if the state where the flow rate is below a certain flow rate continues for 3 minutes or more. In addition to the aspect, the instantaneous flow rate immediately after replacing the pretreatment cartridge 30 and the filtration membrane element 60 is stored in the memory unit, and when the stored instantaneous flow rate is reduced by 20% or more, the “preprocessing” A method of lighting “cartridge replacement” may be used. The degree of decrease need not be 20%, and can be determined appropriately depending on the quality of raw water such as tap water to be filtered.

(4) When a filter membrane 61 having a desalination rate of nearly 90% is used, the silver ions added by the pretreatment cartridge 30 are concentrated and discharged. However, when a filtration membrane having a desalting rate of about 40 to 70% is used, since silver ions are the same monovalent ions as Na ions, about 40 to 70% of silver ions are contained in the permeated water. Since the silver ion concentration of the permeated water is in the range of 10 to 50 μg / l as described above, a program for reducing the silver ion concentration eluted from the second antibacterial unit unit 90 depending on the type of the filtration membrane 61 is provided in the control unit 200. Can be incorporated in advance. For this purpose, the identification means 65 is provided in the water collecting pipe of the filtration membrane element, and the identification unit 56 is provided inside or outside the membrane filtration unit container 51 so that the type of the filtration membrane can be identified based on the desalination rate of the filtration membrane. It is good to have it. If the silver ion concentration eluted from the 2nd antibacterial unit part 90 can be reduced, the lifetime of the 2nd antibacterial unit part 90 can be extended, or it can design now compactly.

(5) Furthermore, the desalting rate of the filtration membrane is temperature-dependent, and generally the desalting rate decreases as the temperature increases. If this property is utilized, a water thermometer is installed in front of the second antibacterial unit 90, and when the water temperature of the permeated water reaches a certain temperature, the voltage is not applied to the second antibacterial unit 90 or applied. It is also possible to reduce the voltage to be reduced step by step. As an example, there is a method in which the applied voltage is reduced to 50% when the water temperature is 25 ° C. or higher, and no voltage is applied when the water temperature is 30 ° C. or higher.

(6) In the membrane filtration unit 50 of the present invention, it is preferable to use a filtration membrane element 60 using a nanofiltration membrane, but besides a nanofiltration membrane, a microfiltration membrane (MF membrane), an ultrafiltration membrane ( UF membrane) and reverse osmosis membrane (RO membrane) can be used.
Among these, the MF membrane and the UF membrane are membranes having a function of performing physical filtration with micropores provided in the membrane. The MF membrane has a pore size of about 0.1 μm and can filter suspended substances, colloids, and bacteria in tap water, but cannot filter viruses sufficiently. The UF membrane has a pore size smaller than that of the MF membrane and is about 0.01 μm, so that viruses, polymers and the like can be screened out.

  MF membranes and UF membranes use high-molecular materials such as polysulfone (PS), polyethylene (PE), and polyacrylonitrile (PAN) to provide a membrane with high durability and a large amount of permeated water per unit membrane area. can do. Further, when polyvinylidene fluoride (PVDF) or polypropylene (PP) is used, it is preferable because of its hydrophobicity, the retained air can be easily released.

  When a hollow fiber membrane-shaped filtration membrane is used as the MF membrane or UF membrane, a module in which a plurality of hollow fiber membranes are bundled in a U shape or an I shape and stored in a housing can be used.

  The RO membrane is a separation membrane that can selectively remove ions dissolved in tap water like the nanofiltration membrane. The removal performance is higher than that of the nanofiltration membrane, and the NaCl desalting rate described above is 99% or more (the evaluation conditions are the same). The material of the RO membrane is preferably an aromatic polyamide as in the case of the nanofiltration membrane, and stable desalting performance and fresh water generation ability are obtained in a wide pH range, and storage is easy. In addition to the aromatic polyamide, cellulose acetate, aliphatic polyamide, polyvinyl alcohol, polyethersulfone and the like can be used.

  When an RO membrane is used, if a low operating pressure for achieving a desalination rate of 99% or higher is selected, a sufficient amount of permeated water can be obtained even with tap water pressure adjusted with a pressure reducing valve. However, if a high operating pressure is selected, a sufficient amount of permeated water cannot be obtained with tap water pressure alone. Therefore, a booster pump for increasing the water pressure is provided immediately before the membrane filtration unit 50 or upstream of the pretreatment unit 20. It is necessary to install.

(7) In the present invention, regarding the method for controlling the voltage applied to the silver electrode 91, the instantaneous flow rate of the permeated water is calculated from the instantaneous flow rate of the raw water flow rate sensor 40 and the instantaneous flow rate of the concentrated water flow rate sensor 80. The applied voltage can be changed in proportion to the flow rate. The silver ions eluting from the silver electrode 91 are almost constant, whereas the instantaneous flow rate of the permeated water is affected so that the silver ion concentration in the permeated water relatively decreases when the instantaneous flow rate of the permeated water is large. Without being received, it becomes possible to add a substantially constant silver ion concentration.

(8) Although the current value was measured while applying a voltage to the silver electrode 91 and the resistance (conductivity) of the permeated water was calculated from the measurement result, the embodiment was described. The resistance (conductivity) of the permeated water may be measured with the electric conductivity meter 93.
In addition, since the resistance (conductivity) of the permeated water is almost proportional to the chlorine ion concentration in the permeated water, the silver electrode is used so that silver ions and chlorine ions are not combined and precipitated as silver chloride in the permeated water. It is also possible to control the voltage applied to 91.

(9) Although the aspect which attaches the scale prevention filter 98 in preparation for the case where a silver chloride scale generate | occur | produces in the silver electrode 91 was demonstrated, installing the silver electrode 91 in the inside of the chamber 93 provided in the vertically upward pipe line You can also. The silver chloride scale peeled off from the silver electrode 91 can be dropped below the pipe line or the chamber 93 to prevent inflow into the tank 100.
(10) In order to set the silver ion concentration to 10 to 50 μg / l, a pause time is provided after voltage application. If the electrode material can be made of a material other than pure silver and the amount of elution of silver ions can be suppressed, a pause time is provided. The voltage may be applied to the electrode without any problem. In this case, it is not necessary to provide a calculation function for calculating the pause time in the control program.

(11) Although the aspect which adds silver ion with respect to the permeated water whole quantity which passes the 2nd antibacterial unit part 90 was demonstrated, while providing a bypass just before the 2nd antibacterial unit part 90, in the 2nd antibacterial unit part 90 It is also possible to attach a constant flow valve to the incoming pipe line and pass permeated water with a constant instantaneous flow rate through the second antibacterial unit unit 90. In this case, since it is not necessary to consider the variation of the silver ion concentration due to the instantaneous flow rate, the program of the control unit 200 can be simplified, or the raw water flow rate sensor 40 and the concentrated water flow rate sensor 80 can be omitted. Contributes to downsizing and parts saving.

(12) In the control unit 200, the aspect in which the display unit 220, the operation button 240, and the calculation unit 250 are provided with independent members has been described. However, the LCD 221 and the various LEDs 228 to 233 of the display unit 220 and the various buttons of the operation button 240 are described. The substrate 252 provided with 241 to 244 and the CPU 251 may be housed in one case and sealed with a potting agent for waterproofing. The control unit 200 can be integrated into one, and parts can be saved. Further, when the various buttons 241 to 244 are provided on the substrate 252 provided with the CPU 251, the button substrate 245 can be omitted. A combination of the display unit 220 and the operation button 240, a combination of the display unit 220 and the calculation unit 250, and a combination of the operation button 240 and the calculation unit 250 may be used.

(13) Although the four sensors 111 to 114 constituting the water level sensor unit 110 have been described as being provided inside the tank 100, a light transmitting unit and a receiving unit are provided outside the tank 100 to detect the water level. May be. In this case, in order to secure a place where the water level sensor unit 110 is installed, a convex protrusion may be provided on a part of the tank 100, and the four sensors 111 to 114 may be provided so as to sandwich the protrusion. Furthermore, it is also a preferable aspect that two or more sensors are installed together in one convex protrusion.

It is a perspective view which shows the external appearance of one Embodiment of the water purifier which concerns on this invention. It is a perspective view from the back side which shows the water purifier of FIG. 1 in the state which removed the main body cover of the back side. It is the assembly perspective view which looked at the water purifier of FIG. 1 from the back side. It is a six-face figure which shows the external appearance of the water purifier of FIG. It is a longitudinal cross-sectional view which shows the arrangement | positioning state in the back side part with a pre-processing cartridge and a filtration membrane element about the water purifier which concerns on this invention. It is a longitudinal cross-sectional view which shows the arrangement | positioning state in the front side part with a 2nd antibacterial unit position about the water purifier which concerns on this invention. It is a longitudinal cross-sectional view which shows the arrangement | positioning state in the right side part with a pre-processing cartridge about the water purifier which concerns on this invention. It is a cross-sectional view which shows one Embodiment of the arrangement | positioning state in the upper part with a pre-processing cartridge and a nanofiltration membrane element about the water purifier which concerns on this invention. It is a cross-sectional view which shows other one Embodiment of the arrangement | positioning state in the upper part with a pre-processing cartridge and a nanofiltration membrane element about the water purifier which concerns on this invention. It is sectional drawing which shows one Embodiment of the pre-processing cartridge used with the water purifier of this invention. It is the schematic which shows one Embodiment of the flow sensor in the water purifier of this invention. It is the schematic which shows one Embodiment of the nanofiltration membrane element used with the water purifier of this invention. It is a partially broken perspective view which shows the outline of the internal structure in the nanofiltration membrane element of FIG. It is a partially broken perspective view which expands and shows the 2nd antibacterial unit in the water purifier of the present invention, and its neighborhood part. It is the schematic which shows one Embodiment of the control part in the water purifier of this invention. It is the schematic which shows one Embodiment of the power supply part in the water purifier of this invention. It is the schematic which shows one Embodiment of the display part in the water purifier of this invention. It is the schematic which shows one Embodiment of the operation button in the water purifier of this invention. It is the schematic which shows one Embodiment of the calculating part used with the water purifier of this invention.

Explanation of symbols

1: Water purifier main unit 2: Front plate 3: Water level display window 4: Water purifier top cover 5: Open / close valve 6: Water pipe 7: Raw water inlet 10: Inlet valve unit 11: Raw water solenoid valve 12: Pressure reducing valve 13 : Relief valve 20: Pretreatment part 21: Pretreatment part container 22: Pretreatment part cover 23: Pretreatment part inflow port 24: Pretreatment part discharge port 25: Check valve 30: Pretreatment cartridge 31: Coarse filtration means 32: Silver impregnated activated carbon 33: Partition plate 34: Silver impregnated activated carbon case 35: Activated carbon case outlet 36: Circular packing 37: Activated carbon holding member 40: Raw water flow sensor 41: Impeller 42: Magnet 43: Magnetic switch

50: Membrane filtration section 51: Membrane filtration section 52: Membrane filtration section lid 53: Inlet 54: Concentrated water outlet 55: Permeated water outlet 56: Identification section 60: Filtration membrane element 61: Filtration membrane 62: Raw water flow Road material 63: Permeate channel material 64: Water collecting pipe 65: Ring-shaped sealing member 66: Sealing member 70: Constant flow valve 71: Drain port 80: Concentrated water flow sensor 90: Second antibacterial unit 91: Silver electrode 92 : Connection part 93: Chamber 94: Chamber inflow port 95: Chamber outflow port 96: Connection pipe 97: Cap 98: Scale prevention filter 99: Electrical conductivity meter

100: Tank (water storage part)
101: Tank main body 102: Tank lid 103: Tank lid support member 110: Water level sensor 111: HH sensor 112: H sensor 113: L sensor 114: LL sensor 120: Fixing tool 121: Fixing tool 130: Tank outlet 140: Water discharge Pump 141: Pipe line 142: Check valve 143: Water outlet cap 144: Purified water outlet 150: Drainage solenoid valve 160: Overflow pipe 200: Control part 210: Power supply part 211: Battery 212: Battery case 213: Battery case body 214 : Battery case cover 215: Waterproof member 217: Lead wire

220: Display unit 221: Liquid crystal display unit (LCD)
223: Battery life display 224: Pretreatment cartridge life display 225: Filtration membrane element life display 226: Filtration membrane element type display 227: Digital display 228: Power LED
229: Drainage LED
230: Water supply LED
231: Pretreatment cartridge replacement LED
232: Filtration membrane element replacement LED
233: Maintenance LED
234: Second antibacterial unit replacement LED
240: Operation button 241: Power button 242: Drain button 243: Water supply button 244: Reset button 250: Calculation unit 251: CPU
252: Substrate 253: Calculation unit case 254: Potting agent

Claims (2)

A water purifier in which a filtration membrane element in which any one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, and a reverse osmosis membrane is installed is installed in the water purifier, and the outer shape of the water purifier Is essentially composed of a water purifier body and a water purifier lid, the container body containing the filtration membrane element is installed in the water purifier body, and a detachable container lid is disposed at the top of the container body A water purifier characterized by The water purifier according to claim 1, wherein the container main body and the container lid are each a resin molded product, and the container lid is fitted to the container main body by a screw type or a bayonet type.

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