JP5954346B2 - Faucet direct water purifier - Google Patents

Description

  The present invention relates to a faucet-directly connected water purifier for filtering tap water, which is preferably used mainly at home.

  In recent years, water purifiers have become popular worldwide. In addition to the stationary type installed near the sink of the kitchen and the undersink type installed under the sink, the direct connection type of the faucet directly connected to the faucet is also used. The faucet direct-coupled water purifier has the advantage that it is cheaper and more compact than the stationary and under-sink types, and can be used easily.

  However, in some areas where tap water quality is poor, there is a problem that the filter membrane built in the water purifier clogs earlier than the expected period of use. In particular, the faucet direct connection type has a small membrane area due to its compactness, and may become clogged in a short period of time and become unusable.

  In order to solve this problem, there is a method in which a sub-filter having a lower fractionation performance than the filtration membrane is disposed on the upstream side of the filtration membrane. By removing the relatively large turbidity with the sub-filter, the filtration membrane can be used for a long time.

  For example, in Patent Document 1, a main cartridge including a main filter and a sub-filter cartridge including a sub-filter (pre-filter in the literature) having inferior fractionation performance than the main filter are arranged in series, and they are placed in water. A water purifier that is connected to a stopper with a hose is disclosed. This is the most common water purifier with a sub-filter cartridge that can be implemented either undersink or stationary. However, the sub filter cartridge, the main filter cartridge, the hose, the water purification outlet (four sets in the literature), and the number of constituent members are large, and there are four or more connecting parts, so there is a problem that the sub filter cannot be easily replaced. . In addition, there was a problem that the water purifier became large.

  Patent Document 2 discloses a faucet direct-coupled water purifier in which a filter for filtering foreign matters mixed in tap water is arranged on the upstream side of a container containing activated carbon. In this water purifier, since the container containing activated carbon and the filter for removing foreign substances can be separated, one can be replaced and the other can be regenerated. However, when performing these replacement / regeneration treatments, the container containing activated carbon and the filter for removing foreign substances are integrated with each other, removed from the water purifier body including the flow path switching device, and again Attached to the main body. That is, every time a filter that removes foreign matter is to be replaced, the container containing activated carbon must be separated from the flow path switcher, and then the container containing activated carbon and the filter that removes foreign matter are separated. After the filter for removing the foreign matter is replaced with a new one, the filter for removing the foreign matter again and the container containing activated carbon must be integrated and reattached to the flow path switching device. Therefore, there is a problem that it is inconvenient because it takes time to replace the filter for removing the foreign matter.

  Patent Document 3 discloses a faucet direct-coupled water purifier in which two filter cartridges can be attached to a water purifier main body including a flow path switching device. In this water purifier, the two filter cartridges are independent and can be individually replaced. However, in this water purifier, since two independent filter cartridge mounting portions are provided in the water purifier main body including the flow path switching device, the water purifier main body present in the area where the user needs to secure visibility is provided. Since the size of the cartridge is increased and all the cartridges are exchanged together, there is a problem that only a substantial filter medium not including the enclosure cannot be easily exchanged.

JP 2006-102621 A Japanese Utility Model Publication No. 61-125396 Japanese Utility Model Publication No. 10-98

  In view of the problems as described above, an object of the present invention is a faucet directly connected water purifier in which a sub-filter having a lower fractionation performance than the main filter is disposed upstream of the main filter such as a filtration membrane. Another object is to enable the user to easily replace the sub-filter without increasing the size of the flow path switching device present in the region where visibility is desired.

The present invention for solving the above-described problems is characterized by any one of the following configurations (1) to (3).
(1) A faucet comprising a flow path switch fixed to the faucet and a main filter cartridge detachably connected to the flow path switch, wherein the main filter cartridge includes a housing and a filter medium (A). A faucet direct-coupled water purifier, wherein a sub-filter is detachably connected to the outer surface of the main filter cartridge.
(2) The faucet direct connection type according to (1), wherein the sub filter closure member is detachably covered, and the closure member is detachably engaged and connected to the outer surface of the main filter cartridge. Water purifier.
(3) The faucet direct-coupled water purifier according to (2), wherein the main filter cartridge can pass water to be treated even when the sub-filter is not attached.
The closing water purifier according to (1) or (2), wherein the closing member has a through hole, and an elastic body is detachably attached to the through hole.

  According to the present invention, a faucet direct-coupled water purifier in which a sub-filter (filter medium (B)) having a lower fractionation performance than the main filter is disposed upstream of a main filter (filter medium (A)) such as a filtration membrane. Even so, since the sub-filter is detachably connected to the outer surface of the main filter cartridge housing including a case, a lid, and the like having an opening, the sub-filter is directly connected to the main filter cartridge. Become. For this reason, the user can easily and easily replace the sub-filter without increasing the size of the flow path switching device present in the region where visibility is desired.

It is a front schematic diagram of the faucet direct connection type water purifier concerning one embodiment of the present invention. It is front sectional drawing of the main filter cartridge, sub filter, and obstruction | occlusion member in the faucet direct connection type water purifier which concerns on one Embodiment of this invention. It is front sectional drawing of the sub filter and obstruction | occlusion member in the faucet direct connection type water purifier which concerns on one Embodiment of this invention. It is front sectional drawing of the cover in the faucet direct connection type water purifier which concerns on one Embodiment of this invention. It is front sectional drawing of the main filter cartridge and obstruction | occlusion member in the faucet direct connection type water purifier which concerns on one Embodiment of this invention. It is a front schematic diagram of the faucet direct connection type water purifier concerning one embodiment of the present invention. It is a water flow order in the main filter and sub filter of the faucet direct connection type water purifier which concerns on one Embodiment of this invention. It is front sectional drawing of the sub filter and obstruction | occlusion member in the faucet direct connection type water purifier which concerns on one Embodiment of this invention. It is front sectional drawing of the sub filter and obstruction | occlusion member in the faucet direct connection type water purifier which concerns on one Embodiment of this invention. It is the upper surface schematic of the faucet direct connection type water purifier which concerns on one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to embodiment shown below, You may change within the range which can achieve the objective of the said invention.

  FIG. 1 is a schematic front view of a faucet directly connected water purifier 1 according to an embodiment of the present invention. 2 shows a state in which the main filter cartridge including the main filter (filter medium (A)), the sub filter (filter medium (B)), and the blocking member of the faucet direct-coupled water purifier 1 shown in FIG. 1 are connected. It is front sectional drawing.

  The faucet direct-coupled water purifier 1 shown in FIGS. 1 and 2 mainly includes a flow path switching device 2, a main filter cartridge 5, a sub filter 33, and a closing member 32. The flow path switch 2 is directly attached to the faucet using the mounting nut 3, and is used in a state where the main filter cartridge 5 is attached to the side surface of the flow path switch 2. The sub filter 33 is used by being directly connected to the upper outer surface of the main filter cartridge 5.

  The flow path switch 2 has a function of switching between a flow path that discharges tap water (treated water) from a faucet as it is and a flow path that passes through the main filter cartridge 5 and the sub filter 33 and discharges it as purified water. As shown in FIG. 2, tap water sent to the main filter cartridge 5 through the flow path switching unit is a portion other than the main filter (hollow fiber membrane 23) in the main filter cartridge 5, the sub-filter 33, the main filter Pass through in the order of, and purified water is obtained.

  The main filter cartridge 5 will be described with reference to FIG.

  The main filter cartridge 5 mainly includes a main filter case 21 having an opening, and a lid 31 that closes the opening of the main filter case 21 and serves as a boundary member with the sub-filter 6. And it is comprised from the hollow fiber membrane 23 (filter medium (A)) as a main filter accommodated in the inside of the housing | casing, and the adsorbent 22 arrange | positioned in the upstream. The main filter case 21 and the lid 31 form a casing, and an internal space of the main filter cartridge 5 that houses the filter medium (A) is formed.

  The main filter case 21 has a flow path switching unit connection portion 25 for removably connecting to the flow path switching unit on its side surface, and a purified water outlet 24 for discharging purified water that has passed through the hollow fiber membrane 23 on its bottom surface. It is a bottomed cylindrical molded product. The channel selector connection unit 25 uses a bayonet structure. A connection structure with sealing properties such as a screw structure or a one-touch joint may be used, but if a bayonet structure is used, it is not necessary for the user to rotate and attach it many times like a screw, and it can be easily attached and detached. Moreover, since it can implement with few members, it is preferable. Further, the use of ABS resin as the material makes it cheaper and lighter, so that it is easy to handle during assembly work. In addition, resins such as polycarbonate, AS resin, polystyrene, acrylic resin, and polyethylene can also be used.

  Examples of the adsorbent 22 accommodated in the main filter cartridge 5 include activated carbon, metal silicates such as zeolite, calcium phosphate such as hydroxyapatite, titanium oxide, ion exchangers including ion exchange resins, chelate resins, and the like. Any of or a combination of them can be used. Adsorbents generally have the risk of bacterial growth if stored for a long period of time, so use silver-impregnated activated carbon carrying silver ions as an antibacterial agent and / or ion exchangers carrying silver ions It is more preferable to elute silver ions when water is passed. The shape of the silver-impregnated activated carbon may be any of spherical, powdery, granular, fibrous, granular, crushed, etc. Among them, powdery and granular are particularly preferable because of their large surface area per unit volume.

  A microfiltration membrane or an ultrafiltration membrane can be used for the hollow fiber membrane 23 as a main filter having high fractionation performance, and for example, a polysulfone hollow fiber membrane subjected to hydrophilic treatment can be used. In addition, hollow fiber membranes of various materials such as polyethylene, polypropylene, polyacrylonitrile, and cellulose acetate can be used.

  The lid 31 is made of resin such as AS resin, and has a water passage hole with the sub-filter as will be described later. Moreover, it is provided so that the upper surface opening part of the main filter case 21 may be covered, and the space between the adsorbent 22 and the hollow fiber membrane 23 is partitioned. For fixing the lid 31 to the main filter case 21, fitting, ultrasonic welding, or the like is used.

  On the other hand, the sub-filter 33 (filter medium (B)) is detachable / replaceable in a closed space formed by the closure member 32 and the lid 31 that are detachably connected to the lid 31 constituting the outer surface of the main filter cartridge 5. And is directly connected to one end of the main filter cartridge 5.

  The sub-filter 33 is a filter medium with the purpose of assisting the filter function of the main filter (filter medium (A)) of the main filter cartridge 5 and extending the filter life of the main filter. That is, the purpose is to make the main filter usable for a longer period of time by removing large turbidity upstream of the main filter and sending only small turbidity to the main filter. For this reason, it is preferable to use a sub filter 33 that has a lower fractionation performance than the main filter. As the subfilter, the type, material, shape, and direction of water flow are not particularly limited, but when a hollow fiber membrane 23 corresponding to a microfiltration membrane is used as the main filter, as shown in FIGS. A sub-filter having a larger opening than the hollow fiber membrane 23 is preferably used. For example, a filter in which a non-woven cloth filter material made of polypropylene is formed into a cylindrical shape can be used. In the embodiment shown in FIG. 2, water passes from the outer periphery to the inner periphery of the subfilter 33.

  The sub-filter 33 is substantially an exchange member only for the filter medium and does not include a housing made of resin or the like, but a core member, a frame member, and water for maintaining the shape of the filter medium. It may have a packing member for a sealing function.

  Subsequently, the mounting structure of the sub-filter 33 will be described in more detail with reference to FIGS. 3 and 4.

  The sub-filter 33 is arranged in a closed space formed by the closing member 32 and the lid 31 constituting the outer surface of the main filter cartridge 5.

  The closing member 32 is a member made of resin such as AS resin and having a cup shape or the like that covers the sub-filter 33 and has a bayonet structure that meshes with the lid 31 of the main filter cartridge 5. Of course, the connection structure between the closing member 32 and the outer surface of the cartridge may be a screw structure as long as the sealing property at the connection portion is maintained, but the bayonet structure is more preferable because it can be attached and detached with one touch.

  On the other hand, the lid 31 constituting the outer surface of the main filter cartridge 5 has a disk-shaped portion, and a cylindrical wall (cover) having a diameter smaller than the outer diameter of the substrate is formed on the disk-shaped substrate. Wall 35). An inflow hole 36 for water from the sub-filter 33 is provided in the center of the disk. The disk is provided with a plurality of water outflow holes 41 from the main filter cartridge 5 at positions outside the water inflow hole 36 and along the inner surface of the lid wall 35.

  The lid wall 35 has a bayonet structure that meshes with the closing member 32. A groove is provided on the outer peripheral surface of the lid wall 35 with which the closing member 32 comes into contact, and an O-ring 34 for water sealing is attached. The O-ring 34 only needs to be able to be easily sealed when the user fastens the closing member 32 to the lid 31. For example, ethylene propylene rubber (EPDM) can be used. An elastomer such as may be used.

  It should be noted that the portion of the lid 31 that is to be the substrate may not be disk-shaped, and the inflow hole 36 at the center of the lid 31 may be provided with a through portion that leads from the downstream side of the sub-filter 33 to the main filter cartridge 5. Well, the position is not limited to the center.

  The lid 31 serves as a tray on which the sub filter 33 is placed. A sub-filter 33 is placed inside the lid wall 35 and covered with a closing member 32.

  The sub-filter 33 is a cylindrical filter, and has packings 40 at the upper and lower ends of the cylinder. The packing 40 exhibits a water sealing function when the closing member 32 covers the sub-filter 33 and is connected to the lid 31. In other words, the water filter is tightened from above and below with the sub-filter 33 sandwiched between the lid 31 and the closing member 32. In addition, as a material of the packing 40, an elastomer such as EPDM or silicone rubber having a low rubber hardness can be used.

  On the other hand, the closing member 32 has an annular convex portion 37 on the cup-shaped inner top surface in contact with the packing 40 of the sub-filter 33. With this configuration, when the sub-filter 33 is housed inside and the lid 31 and the closing member 32 are tightened, the annular convex portion 37 suppresses the packing 40 of the sub-filter 33 and can be sealed more reliably.

  Further, the closing member 32 has a through hole 38 for venting air on the top surface portion which becomes the uppermost surface when mounted, and a rubber plug 39 (elastic body) is detachably mounted in the through hole 38. Instead of the rubber plug 39, a sealing member holding an elastic body such as an O-ring may be attached to the through hole 38 and sealed.

  When the subfilter 33 is replaced, outside air flows into the closed space that houses the subfilter. There is a problem that the air stays as air bubbles when water flows, and the portion on the sub-filter 33 where the air bubbles contact cannot be used efficiently. Moreover, when the hollow fiber membrane for water purifiers is hydrophilic, when a bubble passes the sub filter 33 and flows in the upstream of the hollow fiber membrane 23, it may become difficult to discharge | emit a bubble outside. If bubbles remain upstream of the hollow fiber membrane 23, the flow of filtered water flowing into the hollow fiber membrane 23 is obstructed and the flow rate is reduced.

  Therefore, it is preferable to provide the through hole 38 and the rubber plug 39 as described above, and to discharge the bubbles to the outside by removing the rubber plug 39 after replacing the sub filter. By doing so, the sub-filter 33 can be used efficiently, and air bubbles can be discharged to the outside at the sub-filter 33 portion, so that the flow rate flowing into the hollow fiber membrane 23 is reduced. Can also be eliminated. Furthermore, it is not necessary to use a hydrophobic hollow fiber membrane that has been conventionally used for discharging bubbles.

  An elastomer such as EPDM or silicone rubber having a low rubber hardness can be used as the material of the elastic body such as the rubber plug 39 or an O-ring instead of the rubber plug 39.

  In the faucet direct-coupled water purifier 1 configured as described above, when the user selects “purified water”, the water to be treated flows into the main filter cartridge 5 and flows into the adsorbent 22. Then, it once flows out from the main filter cartridge 5, is processed by the sub-filter 33 (filter medium (B)), then flows into the main filter cartridge 5 again, is processed by the hollow fiber membrane 23, and flows out from the purified water outlet 24.

  Next, the effect in the said embodiment is demonstrated.

  The water purifier is a faucet-directly connected water purifier that is directly attached to the faucet, and since the sub-filter 33 is directly connected to the outer surface of the main filter cartridge 5, the flow path switching device 2 that exists in a region where visibility is desired is provided. There is no need to increase the size, and it is very compact. In addition, a closing member 32 that forms a closed space together with the outer surface is detachably connected to the outer surface of the main filter cartridge 5 including a case, a lid, and the like having an opening, and the subfilter is connected to the closed space. 33 is detachably arranged. At the same time, as described above, the tap water is in the order of the flow path switching unit 2, the main filter cartridge 5 in the casing other than the main filter, the sub-filter 33, and the main filter in the main filter cartridge 5 casing. Configured to pass through. That is, the tap water once passes through the main filter cartridge 5, then makes a U-turn at the sub-filter 33, and returns to the main filter cartridge 5. Because of these configurations, the sub filter 33 is directly connected to the end of the faucet direct-coupled water purifier 1 and the end of the main filter cartridge 5, and the user can remove the sub filter 33 without removing the main filter cartridge 5. It is possible to easily access the filter 33 and easily exchange the subfilter 33 that is detachably arranged.

  The replacement work of the sub filter 33 that has collected and deteriorated turbidity is removed by removing the blocking member 32 from the cover 31 of the main filter cartridge 5, taking out the deteriorated sub filter 33, and attaching the packing 40 to the new sub filter 33. After it is placed on 31, it simply ends by simply covering the closure member 32 and engaging the lid 31. Since the engagement between the closing member 32 and the lid 31 is a bayonet structure, the closing member 32 can be easily attached and detached with one touch. The bayonet structure is preferable because it can be pushed deeper with a smaller rotation amount than the screw structure, and the closing member 32 can be easily tightened even when the user is weak.

  In the present embodiment, as shown in FIG. 3, since the lid wall 35 is provided, when the user replaces the sub-filter 33, the location of the sub-filter 33 is easily understood. It is good also as a shape which can fix the subfilter 33 to the arrangement | positioning location by providing a groove | channel in the surface which the subfilter 33 on the cover 31 contacts. The height of the lid wall 35 is set lower than the height of the sub-filter 33. There is an advantage that the user can directly touch the sub-filter 33 by simply opening the closing member 32 and can easily take it out.

  In addition, since the main filter cartridge 5 is a separate unit from the sub-filter 33, the main filter cartridge may be dropped or contacted during the replacement work as well as the closing member 32 or the sub-filter 33 removed for replacing the sub-filter 33. Even when an impact is applied to the main filter cartridge 5, the adsorbent 22 and the hollow fiber membrane 23 filled in the main filter cartridge 5 are not leaked, and the replacement work of the sub-filter 33 can be performed safely.

  Further, since the main filter cartridge 5 is an independent unit, as shown in FIG. 5, even if the sub filter 33 is not mounted, the sealing performance of the main filter cartridge 5 is maintained if the closing member 32 is mounted, and the water supply system is maintained. All the water passes through the adsorbent 22 and the hollow fiber membrane 23 and then flows out from the purified water outlet 24. Therefore, the user can determine the necessity of the sub-filter 33 according to the water quality of the area to be used, and the sub-filter 33 can be attached and used only when it is determined to be necessary. In addition, it is possible to select use / non-use of the sub-filter 33 in accordance with changes in tap water quality depending on the season, and high convenience can be obtained. Of course, when the sub-filter 33 is not used, there is no deterioration or consumption, leading to a reduction in the cost of the user, and there is an advantage that the flow rate of purified water is increased.

  Since chlorine, which is a sterilizing component of tap water, is removed by the adsorbent 22, the water after passing through the adsorbent 22 is in a state where germs can grow. Therefore, it is preferable that the amount of accumulated water after passing through the adsorbent 22 in the water purifier is small. When the subfilter 33 is not used, a comparison is made as shown in FIG. 6 instead of the cup-shaped closing member 32 having the subfilter storage space. It is preferred to use a generally flat closure member 32 '. By doing so, not only can it be made compact, but the sub-filter storage space can be kept more hygienic.

  Furthermore, in the embodiment of FIG. 2, the water flow order is the order of the adsorbent 22, the sub filter 33, and the hollow fiber membrane 23. When the particle size of the turbidity in tap water is large (for example, when the particle size is approximately 5 to 100 μm), the sub-filter 33 of the adsorbent 22 as shown in FIG. The structure of the main filter cartridge loaded downstream and upstream of the hollow fiber membrane 23 is preferable because the sub-filter 33 can be used effectively for a long period of time. This is because when the particle size of the turbidity is large, the adsorbent 22 roughens the turbidity and prevents the sub-filter 33 from being clogged early. Even if the adsorbent 22 roughly removes turbidity having a large particle diameter, the adsorbing performance is not greatly deteriorated.

  On the other hand, when the particle size of the turbidity in tap water is small (for example, when the particle size is approximately 0.1 to 5 μm), the water to be treated once passes through the main filter cartridge 5 as shown by the arrow in FIG. Thereafter, an embodiment in which water is passed in the order of the sub-filter 33, the adsorbent 22, and the hollow fiber membrane 23 is preferable. In this water flow sequence, the sub-filter 33 can protect the hollow fiber membrane 23 and prevent turbid matter having a small particle size in tap water from staying in the adsorbent 22 and deteriorating its adsorption performance. Of course, also in the water flow path of the embodiment of FIG. 7, water passes through the flow path switching unit 2 and the main filter cartridge 5 in the case other than the main filter, the sub-filter 33, and the main filter in this order. It will not change.

  Furthermore, the present invention is preferably implemented in the following embodiments.

  As long as the closing member 32 is detachably connected to the outer surface of the main filter cartridge 5, the closing member 32 may not be connected to the lid 31 and may be detachably connected to the main filter case 21.

  Further, it is preferable to use a transparent AS resin (acrylonitrile / styrene resin) for a part or all of the material of the lid 31. If it is transparent, it is possible to simultaneously check the degree of contamination of the main filter (hollow fiber membrane 23) when replacing the subfilter 33. It is preferable because the user can easily determine whether or not the main filter cartridge 5 needs to be replaced by checking the contamination of the main filter. In addition, a resin such as polycarbonate, polystyrene, acrylic resin, ABS resin (acrylonitrile / butadiene / styrene resin) and the like having transparency that can confirm the degree of contamination may be used.

  It is preferable to use a transparent AS resin for part or all of the material of the closing member 32. If there is no transparent portion, it is difficult to determine which of the sub filter 33 and the main filter is dirty, and the blocking member 32 must be removed in order to check the degree of contamination. However, if it is made of a transparent resin, it is possible to check the degree of contamination of the sub-filter 33 without removing the blocking member 32, and it is possible to easily determine whether or not the sub-filter 33 needs to be replaced. In addition, a resin having transparency such as polycarbonate, polystyrene, acrylic resin, polyethylene, and ABS resin may be used.

  Further, it is preferable to use a transparent ABS resin for part or all of the side surface of the main filter cartridge 5, that is, part or all of the side surface of the main filter case 21. If it is transparent, the internal member of the main cartridge 5 such as an adsorbent can be confirmed from the outside, so that the user can easily check the situation such as dirt and determine whether or not the main filter cartridge 5 needs to be replaced. it can. Furthermore, a defective product of the internal member of the main cartridge 5 can be found from the outside, which is preferable in quality control. In addition, a resin having transparency such as polycarbonate, AS resin polystyrene, acrylic resin, and polyethylene may be used. Further, when the transparent member is molded together with the blocking member 32, there is an advantage that it is possible to determine which of the sub-filter 33 and the main filter cartridge 5 should be replaced and replace only the corresponding one.

  In the closed space formed by the outer surface of the main filter cartridge 5 and the closing member 32, an elastic body is disposed between the outer surface of the main filter cartridge 5 and the sub filter 33, and the sub filter 33 is formed by the elastic body. It is also preferable to be biased toward the closing member 32 side. Specifically, for example, as shown in the embodiment of FIG. 8, an elastic body such as a spring 42 that biases the sub-filter 33 is provided on the surface of the main filter cartridge on the lid 31 where the sub-filter 33 contacts. In this way, even when the height of the sub-filter 33 is lower than the lid wall 35, the sub-filter 33 is pushed out by the spring 42 toward the outside of the sub-filter housing space simply by opening the closing member 32. Can be easily replaced. In this case, a spring 42 having a water sealing property is used. Further, the spring 42 may be an elastic body that can achieve the above-described purpose, such as a bellows-shaped spring made of rubber or elastomer, a leaf spring, or a simple elastic plate member.

  Further, the shape of the closing member 32 is preferably a shape close to a flat plate having a height lower than that of the sub-filter 33, as shown in the embodiment of FIG. 9, unlike the cup shape shown in FIGS. . In this case, it is preferable that the height of the lid wall 35 is increased to secure a sub filter storage space formed by the lid 31 and the closing member 32. Such a closing member having a shape close to a flat plate having a low height is advantageous in that it is small in size, uses a small amount of resin, and can be manufactured at low cost. Of course, even in the embodiment shown in FIG. 9, the closing member 32 can be easily attached and detached with one touch, and the sub-filter 33 can be easily replaced. In the embodiment of FIG. 9 as well, it is preferable to adopt a bayonet structure for the connection mechanism between the lid 31 and the closing member 32. Also in the embodiment of FIG. 9, the spring 42 is provided as in the embodiment of FIG. 8, which is a preferred form in which the sub-filter 33 can be easily replaced.

  Unlike the embodiment in which the main filter cartridge 5 as shown in FIGS. 1 and 2 has the purified water outlet 24, the main filter cartridge, the sub-filter, and the main filter cartridge are processed as shown in the embodiment in FIG. An embodiment in which the purified water obtained once returns to the flow path switching device 2 and flows out from a purified water outlet (not shown) provided in the flow path switching device 2 is also preferable. Also in the embodiment of FIG. 10, the closing member 32 that forms a closed space together with the outer surface is detachably connected to the outer surface of the main filter cartridge 5, and the sub-filter 33 is detachably disposed in the closed space. . Therefore, the sub-filter 33 is directly connected to the end of the faucet direct-coupled water purifier 1 and the end of the main filter cartridge 5, and, similarly to the embodiment shown in FIG. 1 and FIG. Without removing the main filter cartridge 5, it is possible to easily access the sub-filter and easily replace the sub-filter that is detachably arranged.

1 Faucet direct connection type water purifier 2 Flow path changer
3 mounting nut 5 main filter cartridge 21 main filter case 22 adsorbent 23 hollow fiber membrane 24 purified water outlet 25 flow path switching unit 31 lid 32 closing member 32 'closing member 33 subfilter 34 O-ring 35 lid wall 36 inflow Hole 37 Annular convex part 38 Through hole 39 Rubber stopper 40 Packing 41 Outflow hole 42 Spring

Claims (3)

A flow path switch fixed to the faucet;
A main filter cartridge detachably connected to the flow path switching device,
The main filter cartridge is a faucet direct-coupled water purifier including a housing, a filter medium (A), and an adsorbent,
A sub-filter different from the adsorbent is directly connected to the outer surface of the main filter cartridge in a detachable manner,
The sub-filter is intended poor fractionation performance than the filter medium (A), and state, and are not disposed on the upstream side of the passage path of the filter medium (A) from the water to be treated,
The adsorbent contained in the main filter cartridge is one or more selected from the group consisting of activated carbon, metal silicate, calcium phosphate, titanium oxide, ion exchanger and chelate resin,
The main filter cartridge includes a cylindrical wall on the outer surface of the main filter cartridge,
The sub-filter is detachably connected directly to the outer surface of the main filter cartridge so that one end of the sub-filter is disposed inside the cylindrical wall.
The height of the sub filter is higher than the height of the cylindrical wall . The sub-filter is detachably covered with a closing member,
The closing member is detachably engaged with and connected to the outer surface of the main filter cartridge,
Sealing performance is maintained at the connecting portion between the closing member and the outer surface,
The faucet according to claim 1, wherein water can pass through the inside of the main filter cartridge and the closing member from the flow path switching unit provided in the main filter cartridge to the filter medium (A). Directly connected water purifier. The faucet direct-coupled water purifier according to claim 2, wherein the main filter cartridge can pass water to be treated even when the sub-filter is not attached.

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