CN109982974B

CN109982974B - Water purifier, water purifier holder, and water purifier cartridge

Info

Publication number: CN109982974B
Application number: CN201780073171.9A
Authority: CN
Inventors: 高岛孝辅
Original assignee: Toray Industries Inc
Current assignee: Toray Industries Inc
Priority date: 2016-11-30
Filing date: 2017-11-09
Publication date: 2021-10-29
Anticipated expiration: 2037-11-09
Also published as: TWI733947B; CN109982974A; TW201822863A

Abstract

A cartridge for a water purifier, comprising a cylindrical filter body, a cylindrical powder filter material module accommodating a powder filter material, and a cylindrical hollow fiber membrane module accommodating a hollow fiber membrane, wherein the powder filter material module and the hollow fiber membrane module are coaxially accommodated in the filter body, one end of the hollow fiber membrane module is liquid-tightly connected to a purified water discharge port, and the other end is liquid-tightly connected to an upper inner lid of the powder filter material module directly or via another member; the particle diameter D90 when the cumulative number of the powder filter media in the order of particle diameter is 90%, the particle diameter D10 when the cumulative number is 10%, and the particle diameter D50 when the cumulative number is 50% satisfy the condition of 0.5-D10/D50-0.9.

Description

Water purifier, water purifier holder, and water purifier cartridge

Technical Field

The present invention relates to a water purifier for purifying tap water, a holder for holding the water purifier, and a filter cartridge used for the water purifier.

Background

Conventionally, as water purifiers for purifying tap water, faucet direct connection type water purifiers directly connected to a spout of a tap, fixed type water purifiers used by being placed on a kitchen (kitchen), under-sink type (or built-in type) water purifiers used by being placed inside a kitchen are known. Since the total amount of filtered water that can be treated by the filter medium filled in the filter cartridge for a water purifier is limited, a user continues to use the water purifier while periodically replacing the filter cartridge for a water purifier.

The under-tank type water purifier is larger than a faucet direct-connection type water purifier or a fixed type water purifier, and can be used for a long period of time because the total amount of filtered water that can be treated is also large. Since the water purifier is not disposed near a faucet of a cabinet or a sink, it does not hinder the operation.

As an under-sink type water purifier, the following structures are known: for example, as in patent document 1, a hose having a raw water inlet and a purified water outlet and having a one-touch joint at its tip is connected to be used. The user places the water purifier cartridge on the bottom surface of the space under the water tank, and connects the raw water supply hose and the purified water discharge hose. Clean water can be obtained easily if a faucet of the cabinet is operated.

However, this type of water purifier is generally installed on the back side of the washing table housing section, and in order to take out the water purifier, it is necessary to take out the article housed immediately before, which is a problem that it takes time and effort to replace the water purifier. Further, when the cartridge is replaced, the one-touch joint is detached from the cartridge and attached to a new cartridge, and there is a problem that the one-touch joint is erroneously attached to the raw water inlet and the purified water outlet.

In contrast, the following structures are known: for example, as disclosed in patent document 2, the filtration device is composed of a holder having a raw water inlet and a purified water outlet, and a filtration cartridge having a raw water inlet and a purified water outlet, which is detachably attached to the holder; the bracket is provided with a rotatable filter cartridge fixing mechanism; the raw water inlet pipe is connected with the raw water inlet, and the purified water outlet pipe is connected with the purified water outlet. Since the cartridge is directly connected to the holder, a water supply pipe such as a hose is not required, and the hose is not required to be connected when the cartridge is replaced.

Further, in the water purifier of patent document 1, since the adsorbent section is disposed radially outside the hollow fiber membrane bundle, the outer diameter of the tube becomes large, and there is a problem that a storage space under the cabinet cannot be secured.

On the other hand, as in patent document 3, for example, there is a water purifier cartridge in which activated carbon and a hollow fiber membrane are coaxially arranged in this order from the downstream side. With this configuration, the outer diameter of the cylinder can be reduced while ensuring the volume of the filter medium for ensuring the required filtering capacity.

Further, as for the arrangement of the water purifier cartridge on the bottom surface of the space under the sink, the reduction of the storage space under the cabinet, and the problem of the recent mainstream cabinet having the drawer provided in the space under the sink as in patent document 1, there has been proposed a structure in which the water purifier is suspended in the space under the top plate of the cabinet sink as in patent document 4.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2007-275814

Patent document 2: international publication No. 1999/00645

Patent document 3: international publication No. 2015/199161

Patent document 4: japanese patent laid-open No. 2006-1699784.

Disclosure of Invention

Problems to be solved by the invention

[ problem 1 ]

However, in the holder proposed in patent document 2, when the other ends of the raw water inlet pipe and the purified water outlet pipe are connected to the water purifier faucet, the raw water inlet pipe and the purified water outlet pipe are twisted, and the twist is transmitted to the water purifier faucet, so that water may leak from the connection portion with the water purifier faucet. In addition, when a high water pressure is applied to a connection portion between the raw water inlet pipe and the raw water inlet, and between the purified water outlet pipe and the purified water outlet, water leakage may occur.

Accordingly, the present invention provides the following water purifier: the water purifier tap can be connected with the raw water inlet pipe and the purified water outlet pipe in a rotatable manner, so that the twisting generated when the water purifier tap is connected with the raw water inlet pipe and the purified water outlet pipe can be released, and water leakage from a connection part of the water purifier tap can be prevented; by press-fixing the pipe head member and the hose body fastening member, which are formed of the raw water inlet pipe and the purified water outlet pipe, water leakage can be prevented even when a high water pressure is applied.

[ problem 2 ]

In addition, in the molded activated carbon used in the cartridge proposed in patent document 3, a binder other than activated carbon is added when the activated carbon is molded, and the amount of activated carbon is reduced because the molded activated carbon is molded in a predetermined volume. By using a powder filter medium instead of the molded activated carbon, the filter medium originally occupied by the binder contributes to filtration, and therefore, the filtration ability can be improved, but if the particle diameter is generally reduced, the pressure loss under water passage in the powder filter unit becomes large, and a predetermined filtration flow rate cannot be secured.

Accordingly, the present invention provides a water purifier filter cartridge that is capable of ensuring a required filtering capacity in a compact shape with less reduction of a storage space under a cabinet sink when the filter cartridge is installed in the storage space under the cabinet sink.

[ problem 3 ]

Further, in the structure described in patent document 4, since the water purifier is fixed to the lower portion of the top plate portion of the cabinet, it is necessary to perform replacement of the water purifier cartridge by drilling into the storage space below the cabinet, which is difficult and time-consuming to handle.

In view of the above-described problems, the present invention provides a holder for a water purifier, which does not reduce a storage space at a lower portion of a cabinet sink even if the holder is provided at the lower portion of the cabinet sink, facilitates replacement of a filter cartridge for the water purifier, and does not require much time and effort in replacement of the filter cartridge for the water purifier, and a water purifier including the holder.

Means for solving the problems

[ means for solving the problem 1 ]

(1-1) the water purifier of the present invention for solving the above 1 st object comprises a filter cartridge containing a filter medium and a filter head for water purifier to which the filter cartridge is attachable and detachable; the filter head for a water purifier comprises: a filter head connecting part for connecting the filter cartridges; a raw water inlet pipe disposed at the filter head connecting portion for introducing raw water into the filter cartridge; and a purified water discharge pipe disposed at the filter head connecting portion for discharging the purified water purified by the filter cartridge; the raw water inlet pipe and the purified water outlet pipe are respectively composed of the following components: a pipe head member including a cylindrical head portion and a cylindrical pipe joint portion extending from the head portion, the pipe head member having a flow path formed in a central portion thereof, the flow path communicating the head portion and the pipe joint portion; a flexible pipe body inserted into the pipe joint portion; and a fastening member attached to an outer periphery of the flexible pipe body, for pressing and fixing the flexible pipe body to the pipe joint portion; the head of the head piece of the raw water inlet pipe and the head of the head piece of the purified water outlet pipe are respectively disposed in two circular insertion recesses formed in the filter head connecting portion and fixed by a fixing mechanism so as not to fall off from the insertion recesses, whereby the raw water inlet pipe and the purified water outlet pipe are respectively rotatably fixed to the filter head.

(1-2) in the water purifier according to the present invention, it is preferable that the head of the raw water inlet pipe and the head of the purified water outlet pipe have outer diameters larger than an outer diameter of the head; the fixing mechanism is composed of a fixing plate which is provided with one or two openings with the size that the head part does not penetrate through but the pipe joint part penetrates through, and a fixing component which fixes the fixing plate to the filter head connecting part; the raw water inlet pipe and the purified water outlet pipe are rotatably fixed to the filter head by fixing the fixing plate to the filter head connecting portion with the fixing member in a state in which the portions other than the head portions of the raw water inlet pipe and the purified water outlet pipe are inserted through the opening of the fixing plate and the head portions are disposed in the insertion recesses.

[ means for solving the problem 2 ]

(2-1) the filter cartridge for a water purifier according to the present invention for solving the problem of the above 2, comprising a cylindrical filter main body, a cylindrical powder filter module accommodating the powder filter, and a cylindrical hollow fiber membrane module accommodating the hollow fiber membrane, wherein the filter main body is provided with a raw water inlet and a purified water outlet, and the powder filter module and the hollow fiber membrane module are coaxially accommodated in the filter main body; the water entering from the raw water receiving port passes through the inside of the powder filter material module and the inside of the hollow fiber membrane module in sequence and is discharged from the purified water outlet; the powder filter module comprises: an outer cylinder which prevents the powder filter material from passing through but allows water to pass through; an inner cylinder disposed inside the outer cylinder, for preventing the powder filter material from passing through but allowing water to pass through; an upper inner lid which is liquid-tightly connected to one end of the outer cylinder and one end of the inner cylinder, and which closes a space between the one end of the outer cylinder and the one end of the inner cylinder to form an opening communicating with a space on an inner diameter side of the inner cylinder; a bottom cover liquid-tightly connected to the other end of the outer cylinder and the other end of the inner cylinder, and sealing a space between one end of the outer cylinder and one end of the inner cylinder and a space on an inner diameter side of the inner cylinder; and the powder filter material, is accommodated in the space surrounded by the aforesaid outer cylinder, aforesaid inner cylinder, aforesaid upper inner cover and aforesaid bottom cover; one end of the hollow fiber membrane module is connected to the purified water discharge port in a liquid-tight manner, and the other end is connected to the upper inner lid of the powder filter module in a liquid-tight manner directly or via another member; the particle diameter D90 when the cumulative number of the powder filters arranged in the order of particle diameter is 90%, the particle diameter D10 when the cumulative number is 10%, and the particle diameter D50 when the cumulative number is 50% satisfy the condition of 0.5-0.5 (D90-D10)/0.9-0.82.

(2-2) in the water purifier cartridge according to the present invention, it is preferable that the raw water receiving port and the purified water discharge port are provided at one end of the filter main body; a water passage is formed to connect a gap between the filter body and the outer cylinder of the powder filter material module, a gap between the filter body and the upper inner cap of the powder filter material module, and a gap between the filter body and the hollow fiber membrane module, and to communicate with the raw water receiving port.

(2-3) in the water purifier cartridge of the present invention, it is preferable that the bottom cover of the powder filter module also serves as a cover for closing the other end of the filter body opposite to the one end thereof at which the raw water inlet and the purified water outlet are provided.

[ means for solving the problem 3 ]

(3-1) the holder for a water purifier according to the present invention for solving the above-mentioned 3 rd problem is a holder for a water purifier for holding a substantially cylindrical filter cartridge, and is characterized by comprising a holding member for holding the filter cartridge from a direction perpendicular to a central axis of the cylinder and a mounting member for fixing the filter cartridge to a wall surface; the holding member has an opening into which the filter cartridge is inserted, and a 1 st locking part and a 2 nd locking part which are engaged with the mounting member; the mounting member has a 1 st engaged portion and a 2 nd engaged portion for engaging the holding member; when the direction in which the center axis of the column of the filter cartridge in the state in which the gripping member grips the filter cartridge is set to the center axis direction, the 1 st locking part is engaged with the 1 st locked part, and the 2 nd locking part is engaged with the 2 nd locked part when the gripping member is engaged with the mounting member in the 1 st direction, among the 1 st locking part, the 2 nd locking part, the 1 st locked part, and the 2 nd locked part; when the holding member is engaged with the mounting member in a 2 nd direction in which the central axis direction is reversed from the 1 st direction, the 1 st locking part is engaged with the 2 nd part to be locked, and the 2 nd locking part is engaged with the 1 st part to be locked; the 1 st locking part and the 2 nd locking part are disposed with respect to the opening so that a direction of insertion of the filter cartridge into the opening of the grip member in a state of engagement in the 1 st direction is different from a direction of insertion of the filter cartridge into the opening of the grip member in a state of engagement in the 2 nd direction.

(3-2) preferably, an angle (acute angle) formed between an insertion direction of the filter cartridge into the opening of the holding member in the state of being engaged in the 1 st direction and an insertion direction of the filter cartridge into the opening of the holding member in the state of being engaged in the 2 nd direction is in a range of 10 to 60 degrees.

(3-3) preferably, the direction of insertion of the filter cartridge into the opening of the holding member in the state of engagement in the 1 st direction is perpendicular to the wall surface.

(3-4) the water purifier of the present invention is also a water purifier provided with the holder for a water purifier of the present invention.

Effects of the invention

According to the water purifier of the present invention, the raw water inlet pipe and the purified water outlet pipe are rotatably fixed, and the water can be prevented from leaking from the connection portion with the water purifier faucet by releasing the twist generated when the water purifier faucet is connected to the raw water inlet pipe and the purified water outlet pipe.

In the water purifier according to the preferred embodiment of the present invention, the pipe head member including the raw water inlet pipe and the purified water outlet pipe and the hose body are fixed by pressing the fastening member, thereby preventing water leakage even when a high water pressure is applied.

Further, according to the water purifier of the preferred embodiment of the present invention, since the fixing plate and the filter head connecting portion are firmly fixed by the fixing member, the fixing plate cannot be detached without using a tool or the like, and thus, the user can be prevented from being detached by mistake.

According to the filter cartridge for a water purifier of the present invention, since water flows in a radial direction from the outside to the inside of the cylindrical powdery filter material portion, the pressure loss under water flow is reduced, and further, the width of the particle size distribution with respect to the average particle diameter is constant or less, so that the pressure loss under water flow can be reduced.

In the water purifier cartridge according to the preferred embodiment of the present invention, the raw water inlet and the purified water outlet are both provided at one end of the filter body, so that pipes connecting the raw water inlet and the purified water outlet can be gathered together, and a space below the water tank can be secured.

In the water purifier cartridge according to the preferred embodiment of the present invention, the bottom cover of the powder filter medium module also serves as a cover for closing the filter main body, so that the number of components can be reduced.

Further, according to the holder for a water purifier of the present invention, the opening direction angle of the opening of the holding member can be changed in two ways with respect to the wall surface by selecting the locking position of the holding member and the attachment member, and even when there is an obstacle on the side of the holding member and the cartridge for a water purifier cannot be attached and detached on the side, for example, the cartridge for a water purifier can be easily attached and detached from other directions by changing the opening direction of the opening of the holding member. Therefore, the water purifier cartridge can be mounted on the upper and lower or inner side walls of the left and right wall surfaces of the limited space at the lower part of the cabinet sink horizontally, vertically or at a desired angle to the wall surfaces regardless of the presence or absence of an obstacle near the installation position of the water purifier bracket, and thus the degree of freedom of installation is increased.

Drawings

Fig. 1 is a perspective view showing an example of a water purifier according to the present invention.

Fig. 2 is a perspective view showing an example of a filter cartridge used in the water purifier of the present invention.

Fig. 3 is a cross-sectional view showing an example of the water purifier of the present invention.

Fig. 4 is a cross-sectional view showing an example of a filter head for a water purifier used in the water purifier of the present invention.

Fig. 5 is a perspective view showing an example of a filter head for a water purifier used in the water purifier of the present invention.

Fig. 6 is a perspective view showing an example of a filter head connecting part used in the water purifier of the present invention.

Fig. 7 is a cross-sectional view showing an example of a raw water inlet pipe and a purified water outlet pipe used in the water purifier according to the present invention.

Fig. 8 is a perspective view showing an example of a filter head fixing plate used in the water purifier of the present invention.

Fig. 9 is a cross-sectional view showing an example of a filter head for a water purifier used in the water purifier of the present invention.

Fig. 10 is a left side view showing an example of a filter head for a water purifier used in the water purifier of the present invention.

Fig. 11 is a perspective view showing an example of a movable shaft used in the water purifier of the present invention.

Fig. 12 is a cross-sectional view showing an example of a filter cartridge used in the water purifier of the present invention.

Fig. 13 is a cross-sectional view showing an example of a filter cartridge used in the water purifier of the present invention.

Fig. 14 is a sectional view (fig. a) and a perspective view (fig. B) showing an example of an annular housing used in the water purifier of the present invention.

Fig. 15 is a perspective view showing an example of a flow regulating plate used in the water purifier of the present invention.

Fig. 16 is a cross-sectional view (fig. a) and a perspective view (fig. B) showing an example of an upper inner lid used in the water purifier of the present invention.

Fig. 17 is a cross-sectional view (fig. a) and a perspective view (fig. B) showing an example of a bottom cover used in the water purifier of the present invention.

Fig. 18 is a cross-sectional view showing an example of a hollow fiber membrane module used in the water purifier of the present invention.

Fig. 19 is a sectional view (fig. a) and a perspective view (fig. B) showing an example of a connection cap used in the water purifier of the present invention.

Fig. 20 is a perspective view showing an example of a configuration in which a water purifier is attached in a vertical direction by using the holder for a water purifier of the present invention.

Fig. 21 is a perspective view showing an installation form of the bracket for a water purifier in fig. 20.

Fig. 22 is a perspective view showing an example of a configuration in which a water purifier is mounted in a horizontal direction by using the bracket for a water purifier of the present invention.

Fig. 23 is a side view showing an installation form of the bracket for a water purifier in fig. 22.

Fig. 24 is a front view showing an example of a filter cartridge attached to a water purifier bracket according to the present invention.

Fig. 25 is a perspective view showing an example of a method of assembling the holder for a water purifier according to the present invention.

Detailed Description

An embodiment of a water purifier according to the present invention will be described with reference to the drawings. As shown in fig. 1, the water purifier 1 includes a filter cartridge (filter cartridge) 2 and a filter head (filter head) 3 for a water purifier, the filter cartridge 2 accommodates a filter medium, and the filter head 3 for a water purifier includes a raw water inlet pipe 7 and a purified water outlet pipe 8, and the filter cartridge 2 is attachable and detachable.

Next, the components constituting the filter head 3 for a water purifier will be described. As shown in fig. 4 and 5, the filter head 3 for a water purifier includes a raw water inlet pipe 7, a purified water outlet pipe 8, a filter head connecting portion 5, a filter head fixing plate 4 disposed on an upper surface of the filter head connecting portion 5, and a flange 6 disposed on a lower surface thereof.

Next, the components constituting the raw water inlet pipe 7 and the purified water outlet pipe 8 will be described. As shown in fig. 7, the raw water introduction pipe 7 includes a head 11, a fastening member (a pressing sleeve) 15, and a flexible pipe 16. The pipe head member 11 includes a cylindrical head portion 14 and a cylindrical pipe joint portion 13 extending from the head portion 14, and a flow path is formed in the center portion to pass through the head portion 14 and the pipe joint portion 13. The flexible pipe body 16 is inserted into the pipe joint portion 13, and the fastening member 15 attached to the outer periphery of the flexible pipe body 16 is pressed and fixed, whereby the flexible pipe body 16 is fixed between the pipe joint portion 13 and the fastening member 15.

The fastening member 15 for pressing and fixing the hose body 16 may be any member as long as it does not leak water when the hose for piping is connected and water is supplied thereto, or the hose is detached by water pressure. Examples of such fastening members include a pressing sleeve, a hose clamp, and a binding band that are pressed and fixed.

The material of the fastening member 15 may be inexpensive resin such as polypropylene, polyacetal, polyethylene, nylon, or polycarbonate, but from the viewpoint of strength, metal such as stainless steel, brass, or bronze is preferable.

The purified water discharge pipe 8 is composed of a pipe head 11, a fastening member 15, and a flexible pipe body 16, similarly to the raw water inlet pipe 7. The pipe head member 11 includes a cylindrical head portion 14 and a cylindrical pipe joint portion 13 extending from the head portion 14, and a flow path is formed in the center portion to pass through the head portion 14 and the pipe joint portion 13. The flexible pipe body 16 is inserted into the pipe joint portion 13, and the fastening member 15 attached to the outer periphery of the flexible pipe body 16 is pressed, whereby the flexible pipe body 16 is fixed between the pipe joint portion 13 and the fastening member 15. That is, it is preferable that the raw water inlet pipe 7 and the purified water outlet pipe 8 are firmly fixed even when a high water pressure or an external force is applied thereto.

The pipe head 11 is preferably made of metal such as stainless steel, brass, or bronze from the viewpoint of strength.

The filter head connecting part 5 shown in fig. 1, 4, 5, and 6 has a bottomed double-walled cylindrical shape having a 1 st cylindrical part 233 and a 2 nd cylindrical part 234, and a space of the 1 st cylindrical part 233 communicates with the raw water inlet pipe 7 and a space of the 2 nd cylindrical part 234 communicates with the purified water outlet pipe 8. A pair of partially

enlarged diameter portions

235 and 236, which are a part of a bayonet mechanism described later, are provided on the inner peripheral side of the 1 st cylindrical portion 233, and a large number of ribs 237 for improving strength are provided on the outer side of the 1 st cylindrical portion 233.

A check valve 213, which opens a flow path by attaching the filter cartridge 2, is provided in the bottomed cylindrical portion 226 of the filter head connecting portion 5 on the raw water inlet pipe 7 side. A check valve 214 for preventing backflow of water is provided in the bottomed cylindrical portion 226 of the filter head connecting portion 5 on the purified water discharge pipe 8 side.

When the filter cartridge 2 is removed from the filter head 3 for a water purifier, the flow paths are closed by the

check valves

213 and 214 attached to the raw water inlet pipe 7 and the purified water outlet pipe 8 of the filter head 3 for a water purifier, and therefore, water can be prevented from flowing backward or leaking.

The filter head fixing plate 4 shown in fig. 4 and 8 is provided with

openings

17 and 18 through which the straight tube portion 222 of the pipe head piece 11 is inserted.

The raw water inlet pipe 7 has a pipe head 11 disposed in the insertion recess 220 of the filter head connecting portion 5, and a straight pipe portion 222 of the pipe head 11 passes through the opening 17 of the filter head fixing plate 4. Similarly, in the purified water delivery pipe 8, the pipe head 11 is disposed in the insertion recess 220 of the filter head connecting portion 5, and the straight pipe portion 222 of the pipe head 11 is inserted through the opening 18 of the filter head fixing plate 4.

The filter head fixing plate 4 is fixed to the filter head connecting portion 5 by a plurality of fixing members (tapping screws) 227 while pressing the head end surface 223 of the head portion 14 of the head piece 11. Thus, the filter head fixing plate 4 fixes the head material 11 to the insertion recess 220 of the filter head connecting portion 5 in the axial direction, and can prevent the head material 11 from falling off and also rotate the head material 11.

The fixing member 227 for fixing the filter head fixing plate 4 to the filter head connecting portion 5 may be a push rivet or a snap rivet, a pull lock (パッチン male) or a snap lock, which does not require a tool, in addition to a tapping screw used for plastic, wood, or the like. Alternatively, the fixing member 227 may be provided as a claw on one of the filter head fixing plate 4 and the filter head connecting portion 5, an opening may be formed in the other, and the claw may be inserted into the opening and fixed. The material of the fixing member 227 may be inexpensive resin such as polypropylene, polyacetal, polyethylene, nylon, or polycarbonate, but from the viewpoint of strength, metal such as stainless steel, brass, or bronze is preferable.

Of course, since the straight tube portions 222 of the pipe head 11 are positioned inside the

openings

17 and 18 of the filter head fixing plate 4 and inside the outer peripheral surface of the head 14 of the pipe head 11, the

openings

17 and 18 have a size such that the head 14 does not penetrate therethrough and the straight tube portions 222 penetrate therethrough. If the

openings

17 and 18 are circular, the outer diameter of the head 14 > the diameter of the

openings

17 and 18 > the outer diameter of the straight tube portion 222.

In the embodiment shown in fig. 4 and 8, the pipe head 11 has the straight pipe portion 222 having an outer diameter larger than the pipe joint portion 13 and smaller than the head portion 14 between the pipe joint portion 13 and the head portion 14, but may have a configuration without the straight pipe portion 222. In this case, when the raw water inlet pipe 7 and the purified water outlet pipe 8 are fixed to the filter head connecting part 5, it is sufficient that the pipe joint part 13 passes through the

openings

17 and 18 of the filter head fixing plate 4, and therefore the

openings

17 and 18 may have a size such that the pipe joint part 13 does not pass through the head part 14. If the

openings

17 and 18 are circular, the outer diameter of the head 14 > the diameter of the

openings

17 and 18 > the outer diameter of the pipe joint 13.

The opening 17 (18) may be formed in various shapes such as a circular shape, a square shape, an oval shape, and a U-shape, as long as the opening is formed in a portion of the pipe head 11 other than the head portion 14 so as to penetrate therethrough and press the head end surface 223 of the head portion 14. Among them, if it is in the same circular shape as the head end surface 223, the opening portion can be minimized to secure a contact area with the head end surface 223, and therefore it is preferable from the viewpoint of strength.

In the embodiment shown in fig. 4 and 8, two

openings

17 and 18 are formed in 1 filter head fixing plate 4, but two filter head fixing plates 4 having only one opening 17 (18) may be used, and the raw water inlet pipe 7 and the purified water outlet pipe 8 may be fixed separately.

The filter head fixing plate 4 may be made of resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, but is preferably made of metal such as stainless steel, brass, or bronze from the viewpoint of strength.

The thickness of the filter head fixing plate 4 is preferably 0.5 to 3.0mm in consideration of both pressure resistance and cost, although it is advantageous to increase the thickness for ensuring pressure resistance, since it is a matter of course that cost increases if the thickness is increased.

When the head part 14 of the head part 11 is attached to the filter head connecting part 5, the head part 11 and the filter head connecting part 5 are joined in a liquid-tight manner by the O-ring 228 disposed between the inner peripheral surface of the insertion recess 220 of the filter head connecting part 5 and the outer peripheral surface of the head part 14, and liquid-tightness is secured.

The filter head connecting part 5 may be made of metal such as stainless steel, brass, or bronze, or resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, but there is an advantage in that ABS resin or polypropylene having a good appearance can be produced by injection molding with respect to appearance and production cost.

With the above configuration, the raw water inlet pipe 7 and the purified water outlet pipe 8 can be made rotatable. This allows the water purifier faucet to be connected to the raw water inlet pipe 7 and the purified water outlet pipe 8 without twisting, thereby preventing water leakage from the connection with the water purifier faucet.

Since the filter head fixing plate 4 and the filter head connecting portion 5 are firmly fixed by the fixing member 227, water leakage can be prevented even when a high water pressure acts on the water purifier 1. Further, since the fixing member 227 cannot be detached without using a tool or the like, it can be prevented from being detached by mistake by the user.

The flange 6 shown in fig. 5 is annular and is fixed to the filter head connecting portion 5 by a plurality of fixing members 227. On the annular inner peripheral side, partial diameter-enlarged

portions

230 and 231, which are a part of a bayonet mechanism described later, are provided so that a pair of

projections

91 and 92 provided on the filter cartridge 2 described later can pass through.

The material of the flange 6 may be a metal such as stainless steel, brass, or bronze, or a resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, but there is an advantage in that ABS resin or polypropylene having a good appearance can be produced by injection molding, with respect to appearance and production cost.

The filter cartridge 2 shown in fig. 2, 12, and 13 is rotated by a bayonet mechanism, and is detachably attached and coupled to the filter head 3 for a water purifier to constitute the water purifier 1. More specifically, at least two

projections

91 and 92 are provided on the outer periphery of the filter body 82 of the filter cartridge 2, and are engaged and rotated by the partial diameter-enlarged

portions

230 and 231 of the flange 6, whereby the projections are coupled by the bayonet mechanism. When the filter cartridge 2 is removed, the operation is performed by rotating the filter cartridge in the direction opposite to the coupling direction.

In this way, since the filter cartridge 2 is attached to and detached from the filter head 3 for a water purifier by using the bayonet mechanism, the attachment and detachment operation is easy and convenient.

As shown in fig. 5, 9, 10, and 11, in the closed space 232 between the inner surface of the filter head connecting portion 5 and the flange 6, the movable shaft 215 is disposed between the inner surface of the filter head connecting portion 5 and the flange 6, and the spring 216 is disposed between the filter head connecting portion 5 and the movable shaft 215. In the rotation of the filter cartridge 2 for attaching to the filter head 3 for a water purifier, the convex portion 217 of the filter body 82 of the filter cartridge 2 comes into contact with the inclined portion 218 of the movable shaft 215 at the completion stage, and the movable shaft 215 is configured to be movable upward, and the movable shaft 215 engages with the convex portion 217 over the convex portion 217. By this passing (engagement), the filter cartridge 2 can be attached by the bayonet mechanism.

With this attachment feeling, the user can reliably know that the attachment is completed, and can reliably perform the attachment without an error (without water leakage). Further, in the case where the convex portion 217 is in the lower outer periphery of the filter head 3 for a water purifier, the user can visually recognize this, so that the completion of attachment can be confirmed more reliably by the vision together with the attachment feeling.

When the filter cartridge 2 is removed from the filter head 3 for a water purifier, the removal is performed in the reverse order of the installation. The user moves the protrusion 219 of the movable shaft 215 upward, and then rotates the filter cartridge 2 in the direction opposite to the coupling direction, thereby completing the removal. By providing the spring 216, the user cannot detach the filter cartridge 2 without consciously performing the detaching operation, so that it is possible to prevent the filter cartridge 2 from being detached or detached, which is not intended by the user.

The material of the movable shaft 215 may be metal such as stainless steel, brass, or bronze, or resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, but polyacetal or polyamide suitable for sliding is advantageously produced by injection molding in terms of quality and production cost.

The filter cartridge 2 shown in fig. 2, 3, 12, and 13 has a raw water inlet 86 and a purified water outlet 88 on the upper end side, a filter body 82 having an open lower end, and a bottom cover 201 closing the opening at the lower end of the filter body 82 to form a housing space. The hollow fiber membrane module 38 containing the hollow fiber membrane bundle 105, the annular shell 208 containing the ion exchanger 203, and the powder filter module 249 containing the powder filter 102 are contained in the containing space, and are coaxially arranged in this order from the upstream side, i.e., the powder filter module 249, the annular shell 208, and the hollow fiber membrane module 38 are connected in a liquid-tight manner. As shown in fig. 3, the filter cartridge 2 is directly connected to the filter head 3 for a water purifier, receives raw water supplied from a water faucet (not shown) for a water purifier through a raw water inlet pipe 7, is a part of the water purifier 1, and can be used to purify raw water and discharge the purified water.

It is preferable to provide both the raw water inlet 86 and the purified water outlet 88 on the upper end side of the filter body 82 because the cartridge 2 can be made compact. However, if the size of the cartridge 2 is not intended, the raw water inlet 86 may be provided on the lower end side of the cartridge 2 and the purified water outlet 88 may be provided on the upper end side of the cartridge 2.

The hollow fiber membrane module 38 is composed of a hollow fiber membrane case 103, a hollow fiber membrane bundle 105, and an injection molding 106. The hollow fiber membrane bundle 105 is sealed and fixed to the downstream side of the hollow fiber membrane case 103 by an injection molding member 106, and is accommodated in the hollow fiber membrane case 103.

The ion exchanger 203 is housed in an annular housing 208. The rectifying plate 202 that produces a rectifying effect on the ion exchanger 203 is attached to an upper inner lid 207 described later, and is disposed on the upstream side of the ion exchanger 203.

The powder filter module 249 is composed of the powder filter 102, the inner cylinder 206, the outer cylinder 205, the upper inner lid 207, and the bottom lid 201. The powder filter medium 102 is accommodated in a substantially cylindrical accommodation space surrounded by the inner cylinder 206, the outer cylinder 205, the upper inner lid 207, and the bottom lid 201. As shown in fig. 12, the raw water entering from the raw water inlet 86 is guided to a cylindrical gap 238 formed between an inner wall surface 239 of the filter body 82 and the outer peripheral surface of the hollow fiber membrane housing 103 and the outer peripheral surface of the outer cylinder 205, then passes through the outer cylinder 205, the powder filtering material 102, and the inner cylinder 206 in the radial direction in this order, is filtered by the flow regulating plate 202, the ion exchanger 203, and the hollow fiber membrane bundle 105 disposed on the downstream side of the inner cylinder 206, and is discharged as clean water from the clean water discharge port 88.

In order to make the cartridge 2 compact, it is most effective and reasonable to dispose the raw water inlet 86 outside the purified water outlet 88 coaxially, and this is a preferred form.

In order to make the filter cartridge 2 compact, it is most effective and reasonable to arrange the hollow fiber membrane module 38, the annular housing 208, and the powder filter module 249 coaxially, and this is a preferred embodiment. If the ion exchange function is not required, the annular shell 208 may be omitted, and the hollow fiber membrane module 38 and the powder filter module 249 may be arranged coaxially and connected in a liquid-tight manner.

Next, the components constituting the filter cartridge 2 will be explained. The outer cylinder 205 is composed of a support frame 34 made of synthetic resin and a filter 36. A plurality of lattice-like openings 35 are provided on the circumferential surface of the support frame 34 of the outer tube 205, and a filter 36 made of synthetic fiber such as polyethylene terephthalate, polypropylene, polyethylene, or nylon is fixed to the circumferential surface of the support frame so as to cover the openings of the openings 35.

The filter 36 has a structure that does not leak out from the facing powder filter medium 102 and has a filter function through which water to be treated passes, and therefore the opening of the filter 36 is smaller than the particle diameter of the powder filter medium 102. In order to reduce the pressure loss due to the water passage, the opening ratio of the filter member 36 is preferably large as long as the strength is acceptable. Similarly, the aperture ratio of the opening 35 of the support frame 34 is preferably large as long as the strength is acceptable.

Since the outer cylinder 205 is constituted by the cylindrical support frame 34 having the plurality of openings 35 on the wall surface thereof and the filter 36 fixed to the support frame 34 and covering the openings 35, the strength of the outer cylinder 205 is improved, and it is possible to suppress the deformation of the outer cylinder 205 due to the water pressure generated in the water purification step, the decrease in the layer thickness of the powder filter medium 102 (adsorbent layer), the decrease in the distance of the adsorbent layer through which the raw water passes in the water purification step, and the decrease in the filtration performance of the water purification cylinder due to insufficient adsorption treatment in the adsorbent layer of the raw water.

Further, in order to effectively utilize the entire powder filter medium 102 accommodated in the substantially cylindrical accommodation space, it is preferable that the region in which the opening 35 is present substantially coincides with the region in which the facing powder filter medium 102 is present. The filter member 36 covering the openings of the openings 35 may be a thin sheet-like structure such as a woven fabric such as a nonwoven fabric or a net, and may have a filter function of passing water to be treated without leaking the powder filter medium 102.

As a method for fixing the filter member 36 to the support frame 34 of the outer cylinder 205, a method of integrally molding the filter member 36 at the time of molding the outer cylinder 205 is preferable in terms of firmly attaching the filter member.

When the filter 36 is integrally molded, if the filter 36 is positioned on the outer peripheral surface of the support frame 34, the powder filter medium 102 filled and accommodated in the inner side of the outer cylinder 205 in the radial direction can be increased in filling amount according to the thickness amount of the support frame 34. Further, by providing ribs or protrusions on the outer side of the support frame 34 to sandwich the filter 36, the strength can be improved so that the filter 36 does not peel off from the support frame 34 under water pressure. Further, if the ribs are provided, they can contribute to an improvement in strength of the support frame 34, which is preferable.

Further, as a fixing method, adhesion with an adhesive, or heat fusion, ultrasonic fusion, or pressure bonding may be used. These methods are preferable because the aperture and the basis weight of the filter can be changed according to the particle size of the powder filter medium 102 to be used, a variety of outer cylinders can be produced using 1 type of support frame, and the shape of the mold of the support frame is simplified, so that the cost of the product can be reduced. In the case of these fixing methods, the filter 36 can be easily fixed by being positioned on the outer peripheral surface of the support frame 34, and the water pressure can be dispersed and held by both the filter 36 and the support frame 34, so that problems such as peeling are less likely to occur, and this is preferable in terms of strength.

In these fixing methods, thermal welding or ultrasonic welding is preferable in order to maintain the fixing strength with the support frame 34. Since the energy applied can be adjusted according to the material of the selected filter 36 and fixed to the support frame 34 with a certain strength or more, ultrasonic welding is preferably used.

Specifically, the following fixed form is preferable: the powder filter 102 can be plugged by winding a sheet-like polyolefin nonwoven fabric as the filter 36 so as to cover the outer peripheral surface of the support frame (of the outer cylinder), ultrasonically welding the entire axial end portions of the nonwoven fabric formed into a cylindrical shape to the outer peripheral surface of the support frame (of the outer cylinder), and further ultrasonically welding the axial seam portions of the nonwoven fabric wound into a cylindrical shape. This fixing form has a simple structure in which the ultrasonic welding portion is the minimum region, and also exerts a reliable effect of preventing leakage of the powder filter medium 102.

Of course, since the outer cylinder 205 is positioned inside the filter body 82 and radially outside the inner cylinder 206, the diameter of the filter body 82 is larger than the diameter of the outer cylinder 205 is larger than the diameter of the inner cylinder 206. An O-ring 229 is fitted into an annular groove of the lower end opening 212 of the outer cylinder 205. Since the purified water is connected to the bottom cover 201 via the outer tub 205, the purified water and the raw water (tap water not purified) are not mixed.

The inner barrel 206 is cylindrical and has openings sized to prevent the passage of the powder filter 102 but allow the passage of water. Preferably, a structure having an opening of 20 to 50 μm can be used. A nonwoven fabric obtained by winding a nonwoven fabric of polyolefin-based thermally fused fibers as a raw material around a heated shaft for a plurality of turns to form a cylindrical shape and cutting the cylindrical shape into a predetermined length is inexpensive and preferable. However, the present invention is not limited thereto. The structure may be a cylindrical structure formed by melting an olefin material such as polypropylene and blow molding the melt. The resin molded article may be a cylindrical resin molded article having an opening on its outer peripheral surface, and a nonwoven fabric or a mesh fabric may be welded or bonded to the cylindrical resin molded article. The inner barrel 206 is preferably a nonwoven fabric. Since the inner cylinder is a nonwoven fabric, the thickness of the inner cylinder is reduced as compared with a structure in which a mesh member is fixed to the inner circumferential surface of an inner casing having a side opening, and a larger amount of the powder filter medium 102 can be filled even if the size of the water purifier cylinder is the same.

The thickness of the inner cylinder 206 formed of a nonwoven fabric is preferably 0.5 to 2 mm. If the thickness is less than 0.5mm, a defect of depression occurs due to water flow resistance and pressure loss of the powder filter medium 102 during water flow. If the thickness exceeds 2mm, the thickness projects outward in the radial direction, and the filling amount of the powder filter medium 102 is reduced. If the thickness is 0.5 to 2mm, no recess is formed and the filling amount of the powder filter material 102 is not unduly reduced.

A downstream end portion (one end) of the inner cylinder 206 is fixed to an inner rib 240 of the upper inner lid 207, which will be described later, by fitting. The powder filter medium 102 is fitted to such an extent that it does not leak and can be aligned with the axis as described later.

An upstream end (one end) of the inner tube 206 is fixed to the inner rib 209 of the bottom cover 201 by fitting. The powder filter medium 102 is fitted to such an extent that it does not leak and can be aligned with the axis as described later.

As shown in fig. 16 (a) and 16 (B), the upper inner lid 207 is a disk-shaped lid having an opening 32 at the center, and has an outer rib 33 standing on a portion connected to the outer cylinder 205 and an inner rib 240 standing on a portion connected to the inner cylinder 206. The outer ribs 33 have a thickness of 0.3 to 2.0mm and a height of 1 to 4mm, and serve to align the central axes of the outer cylinder 205 and the upper inner cap 207. The inner diameter of the outer rib 33 is substantially the same as the outer diameter of the outer cylinder 205, and also serves to prevent the powder filter medium 102 from protruding outward and leaking.

An opening 32 is provided on the inner diameter side of the inner rib 240. The inner rib 240 has an inner diameter substantially equal to the outer diameter of the inner tube 206, and the inner tube 206 is fixed to the inner rib 240 by fitting. The powder filter medium 102 is fitted to such an extent that it does not leak and can be aligned with the axis as described later. Thereby, the inner diameter side flow passage 22 of the inner cylinder 206 communicates with the opening 32. That is, a flow path from the powder filter medium 102 to the flow regulating plate 202 is ensured.

It is preferable that the upper inner lid 207 is transparent because it is possible to check whether there is any abnormality or not in the inner lid 207 during assembly.

A plurality of protrusions 243 are disposed on the outer peripheral surface of the outer rib 33. Since the center axis of the upper inner lid 207 can be easily aligned with the center axis of the filter main body 82, it is preferable in that the assembling workability is improved.

The material of the upper inner lid 207 may be metal such as stainless steel, brass, or bronze, or resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, but ABS resin having high molding accuracy is advantageous in terms of quality and manufacturing cost.

As shown in fig. 17 (a) and 17 (B), the bottom cover 201 is a bottomed cylindrical shape, and after being inserted into the outer cylinder 205 and the inner cylinder 206, the filter body 82 is fastened using a screw and an O-ring. The fixing of the filter body 82 may be welding. If the welding is performed, a sealing member such as an O-ring is not required, and the manufacturing cost becomes low. The ultrasonic welding, the rotary welding, the vibration welding, and the like are not particularly limited, but the rotary welding is preferable because the welding area can be increased and the pressure resistance as the filter cartridge can be increased.

On the bottom surface of the bottom cover 201, a number of ribs 245 for enhancing strength are provided.

The material of the bottom cover 201 may be metal such as stainless steel, brass, or bronze, or resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, but there is an advantage in that ABS resin or polypropylene having a good appearance can be manufactured by injection molding, with respect to appearance and manufacturing cost.

Next, the powder filter medium 102 will be described. As shown in fig. 13, the powder filter medium 102 is accommodated in a substantially cylindrical accommodation space formed by the inner cylinder 206, the outer cylinder 205, the upper inner lid 207, and the bottom lid 201. In the manufacturing process, before the upper inner lid 207 is fitted to the inner cylinder 206 and the outer cylinder 205, the powder filter medium 102 is filled from a portion between the upper portion of the inner cylinder 206 and the upper portion of the outer cylinder 205, and after the filling is completed, the upper inner lid 207 is fitted to the outer wall surface of the upper portion of the inner cylinder 206 and the outer wall surface of the upper portion of the outer cylinder 205 to seal the powder filter medium 102. In addition, it is preferable to increase the packing density of the powder filter medium by vibrating the powder filter medium 102 or by sucking or exhausting air during the packing process, in order to increase the filtration capacity of the water purification cartridge.

The powder filter medium 102 may be a granular or powdery activated carbon made of coconut shell, wood, coal or the like as a raw material, a granular or powdery ion exchanger suitable for removing heavy metals such as lead in raw water, for example, aluminosilicate such as titanosilicate or zeolite, or an ion exchange resin, or the like, which is appropriately packed in combination.

Further, the bottom cover 201 also serves as a cover for closing one end of the powder filter medium 102 and the filter main body 82, so that the powder filter medium 102 can be filled up to the surface of the bottom cover 201, and further, a member for closing one end of the inner cylinder 206 and the outer cylinder 205 is not separately required, which is preferable.

The powder filter medium 102 may have a mean particle diameter of about 30 to 900 μm, and is selected and used according to the type, use, and performance of the water purification cartridge. When the particle diameter is made smaller, the surface area increases, and therefore, the adsorption capacity and the ion exchange capacity of the powder filter material can be improved, and the packing density of the powder filter material can also be improved. The particle diameter of the powder filter medium was measured using a laser diffraction particle size distribution measuring apparatus (model SALD-3100, manufactured by Shimadzu corporation), and the particle diameter (50% particle diameter) in which the cumulative value of the volume based on the particle size distribution accounted for 50% was defined as the average particle diameter.

In a conventional filter medium such as activated carbon of a molded body, the volume ratio of a binder used for molding is about 30 to 20%, and this portion does not contribute to filtration, but by using a powder filter medium, the volume occupied by the binder can be filled with activated carbon or an ion exchanger, and since the added filter medium contributes to filtration, the filtration capacity can be greatly improved.

In general, if the particle diameter is reduced, the pressure loss under water flow through the powder filter portion may become large, and a predetermined filtration flow rate may not be secured. However, in the present invention, as described above, the overall shape (the shape of the powder filter section) of the substantially cylindrical housing space and the powder filter medium 102 housed therein corresponds to the shape of the substantially cylindrical inner tube 206 having a long axial length and a long radial length (thickness). Further, since the water is passed radially from the outside toward the inside of the cylindrical powder filter section, the flow path cross-sectional area of the passed water is much larger than that in the case of passing the water in the axial direction, and therefore, the flow velocity of the passed water is reduced, and even if the powder filter medium having a small particle diameter is packed at a high density, the pressure loss under the passed water can be sufficiently reduced, and a predetermined filtration flow rate can be realized.

The axial length/radial length of the cylindrical powdery filter material part is a value exceeding 1, and is determined according to a required pressure loss or the like, but is preferably 2 or more. The absolute value of the radial length is determined in consideration of prevention of short-cut passage of water at a boundary surface between the powder filter medium and the upper end or the lower end of the housing space, a minimum required value according to the filtration principle of the powder filter medium, and the like, but is generally about 5mm or more in practical use.

As described above, in the present invention, even when the powder filter medium portion is filled with a powder filter medium having a small particle size at a high density, the pressure loss under the water passage can be sufficiently reduced, but if the width of the particle size distribution with respect to the average particle size is made constant or less, the pressure loss can be further reduced. If the particle size distribution is wide, the particle size difference between the powder filter particles having a small particle size and the powder filter particles having a large particle size becomes large. In this case, it is estimated that the powder filter particles having a small particle diameter enter between the powder filter particles having a larger particle diameter, and the density of the powder filter as a whole becomes high, and the powder filter portion is blocked to block the flow of the raw water, thereby causing a large increase in pressure loss. When the range of the particle size distribution is not more than a certain value with respect to the average particle size, the powder filter particles having a small particle size are removed, and therefore, an effect of reducing the pressure loss is expected to be produced. Therefore, the particle diameter D90 when the cumulative number of particles in the powder filter medium in the order of particle diameter is 90%, the particle diameter D10 when the cumulative number is 10%, and the particle diameter D50 when the cumulative number is 50% preferably satisfy 0.5. ltoreq. (D90-D10)/D50. ltoreq.0.9. More preferably 0.6. ltoreq. D90-D10)/D50. ltoreq.0.8.

When (D90-D10)/D50 is less than 0.5, an additional step such as sieving is required for the production of the powder filter, and the proportion of the powder filter that cannot be used by sieving increases, leading to an increase in cost. Further, if (D90-D10)/D50 exceeds 0.9, the chance of the powder filter particles having a smaller particle diameter entering between the powder filter particles having a larger particle diameter increases, and the pressure loss during water passage increases.

As shown in fig. 13, an elastic member 210 is preferably disposed between the powder filter medium 102 and the upper inner lid 207. In this way, the elastic member 210 presses the powder filter medium 102 and the upper inner lid 207, and by being in close contact with them, a gap is not formed between the filled powder filter medium 102 and the upper inner lid 207, and there is no possibility that the powder filter medium 102 will pass through in a short path when the raw water is passed through. As the elastic member, rubbers such as silicone rubbers having low hardness, synthetic resin sponges, foams, nonwoven fabrics, felts, and the like can be used.

In the above description, in order to make the filter cartridge 2 compact, it is most effective and reasonable that the substantially cylindrical members have the same central axis and are coaxially arranged, and this is a preferred form.

Next, the ring case 208 shown in fig. 14 (a) and 14 (B) will be described. Since the ion exchanger 203 is disposed in the annular housing 208 on the downstream side of the powder filter medium 102, the raw water is rectified by the powder filter medium 102 and can be uniformly brought into contact with the entire ion exchanger 203, and specific ions (heavy metal ions such as soluble lead) in the raw water can be removed by ion exchange.

The annular housing 208 has a substantially cylindrical shape including an open bottom surface 24 on the upstream side, an upper surface 25 having an opening 23, an inner cylinder 26, and an outer cylinder 27. The ring housing 208 is preferably a synthetic resin molded product in order to be manufactured at low cost, to allow the ion exchanger 203 to be slidably press-inserted and assembled, and to have rigidity such that it does not deform in shape even when press-inserted. AS the synthetic resin material, polypropylene, ABS resin (acrylonitrile-butadiene-styrene resin), polyacetal, polystyrene, AS resin (acrylonitrile-styrene resin), polycarbonate, acrylic resin, polyethylene, and the like can be used.

In order to achieve a compact filter cartridge 2 and a sufficient filtering capacity, it is preferable that the ratio (L/d) of the axial length (L) of the powder filter medium 102 to the body outer diameter (d) of the filter body 82 is 1.0 to 4.0. If the L/d ratio is smaller than 1.0, the body outer diameter of the filter cartridge 2 becomes large, and the filter cartridge 2 becomes not compact. Further, if the L/d ratio is larger than 4.0, the thickness of the powder filter medium 102 in the water passage direction becomes smaller as the outer diameter (d) of the body portion of the filter cartridge 2 is reduced, and sufficient filtering ability cannot be obtained.

In order to insert the ion exchanger 203 from the open portion of the bottom surface 24 of the annular housing 208, the open portion is preferably formed in an annular shape similar to the shape of the ion exchanger. In order to secure the water passage area of the ion exchanger 203, the opening 23 of the upper surface 25 of the annular shell 208 preferably has an opening area as large as possible within a range that allows the strength of the annular shell 208. The shape of the opening 23 is preferably a plurality of fan-like shapes obtained by equally dividing the annular upper surface 25 so as to provide uniform water flow, but may be other shapes such as a large number of circular or square openings, an oval shape, and the like.

The annular housing 208 according to the present embodiment has a lower outer peripheral surface of the outer cylinder 27 substantially identical to an inner peripheral surface of the outer rib 33 of the upper inner lid 207, and the outer rib 33 is fitted and fixed to the annular housing 208. Thus, the purified water is not mixed with the raw water (tap water not purified).

The upper outer circumferential surface of the outer cylinder 27 of the annular shell 208 is substantially the same as the inner circumferential surface of an outer rib 211 of the hollow fiber membrane shell 103 described later, and the outer rib 211 is fixed to the annular shell 208 by fitting. Thus, the purified water is not mixed with the raw water (tap water not purified).

Further, a flange portion 28 is provided on the outer peripheral surface of the outer tube 27. It is preferable in that it is possible to position the annular housing 208, the upper inner lid 207, the annular housing 208, and the hollow silk membrane housing 103 when they are assembled.

The material of the ring housing 208 may be metal such as stainless steel, brass, or bronze, or resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, but ABS resin having high dimensional accuracy is advantageous in terms of quality and manufacturing cost. The ion exchanger 203 is preferably in the form of a ring in which long filter media having ion exchange capacity are layered and wound. In particular, when the ion exchanger 203 is in the form of a ring manufactured by slicing a raw material formed by winding and stacking sheet-like long filters into a predetermined thickness in the axial direction in a cross section perpendicular to the axial direction, the ion exchanger can be manufactured at low cost, which is more preferable. Alternatively, for example, instead of a long filter medium, a relatively short filter medium having ion exchange capacity such as a short strip may be connected to each other and wound in a layered manner. Further, only the fibrous filter having ion exchange ability may be compressed and molded into a predetermined annular shape.

Further, in order to easily form the ion exchanger 203 into a ring shape in which the ion exchanger 203 is wound in layers and easily maintain the shape thereof, the radial thickness t of the ion exchanger 203 in the ring-shaped case 208 is preferably set to be thick_aRelative to the outer diameter d of the ion exchanger 203_oRatio t of_a/d_oThe structure satisfies the relation of 0.1-0.35.

The long filter medium having ion exchange capacity is preferably configured by making the ion exchange fibers into a sheet, but may be configured by supporting an adsorbent having ion exchange capacity on a nonwoven fabric, a felt, or the like. The ion exchange fiber is a fiber in which a predetermined functional group is bonded to a polymer matrix of styrene, acrylic, methacrylic, or phenol. In order to obtain higher performance, it is preferable to use a precursor of acrylic or methacrylic. Examples of the predetermined functional group include sulfonic acid, carboxylic acid, trimethylammonium, dimethylethanolammonium, dimethylamine, polyamine, iminodiacetic acid, aminocarboxylic acid, and polycarboxylic acid. Sulfonic acids and carboxylic acids are preferred for higher performance. As the adsorbent having ion exchange ability, it is preferable to use an inorganic adsorbent such as aluminosilicate, calcium phosphate, calcium carbonate, or titanosilicate, or an organic adsorbent such as ion exchange resin or chelate resin. In order to obtain higher performance, titanosilicate and aluminosilicate are preferably used. The long filter medium may be used by mixing a plurality of filter media. For example, if a sheet-like molded body is used in which ion exchange fibers and fibrous active carbon are mixed, a cartridge having excellent heavy metal removal performance and also having improved removal performance for trihalomethanes, musty odor, and the like can be obtained.

The rectifying plate 202 shown in fig. 15 will be explained. The purified water purified by the powder filter medium 102 passes through the inner cylinder 206, contacts the inner cylinder plane 248 of the annular housing 208, flows in the radial direction, passes through the bottom surface 24, and reaches the ion exchanger 203. Here, since the rectifying plate 202 has a plurality of opening holes 247 arranged on the upper surface 246, the inflow clean water can be caused to have an appropriate pressure loss, and thus can flow more uniformly until reaching the ion exchanger 203, and the filtering capability of the ion exchanger 203 can be improved.

The aperture diameter of the opening hole 247 is preferably Φ 0.5 to Φ 3.0, and the opening ratio to the upper surface 246 is preferably 15% to 25%, in view of the balance between uniform flow of the inflowing clean water and pressure loss.

The material of the rectifying plate 202 may be a metal such as stainless steel, brass, or bronze, or a resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, and there is an advantage in that ABS resin having high dimensional accuracy is manufactured by injection molding with respect to quality and manufacturing cost.

The filter body 82 shown in fig. 2 and 12 has a raw water receiving port 86 at the front end, and a purified water discharge port 88, a small-diameter O-ring 87, a large-diameter O-ring 89, and a pair of

projections

91 and 92 as a bayonet mechanism are provided in this order from the vicinity of the front end on the outer periphery.

The filter body 82 has an opening with a larger diameter and a double-layer cylindrical shape inside, and a connection cap 104 described later is inserted into the inner cylinder 93. The inner circumference of the inner cylinder 93 communicates with the purified water discharge port 88, and the outer circumference of the inner cylinder 93 communicates with the raw water inlet 86.

The material of the filter body 82 may be metal such as stainless steel, brass, or bronze, or resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, but there is an advantage in that ABS resin or polypropylene having a good appearance can be produced by injection molding, with respect to appearance and production cost.

A bundle 105 of hollow fiber membranes, which is folded into a U-shape by bundling the hollow fiber membranes, is sealed and fixed by an injection molding 106 to an opening 125 at the center of the hollow fiber membrane case 103 shown in fig. 13 and 18. The injection-molded material 106 is filled between the hollow fiber membranes and the hollow fiber membrane case 103, and is cured to be fixed. Before the hollow fiber membrane case 103 is coupled to a coupling cap 104 described later, a part of the injection molding 106 is cut off, and the hollow fiber membrane bundle 105 is opened toward the coupling cap 104. It is preferable to apply a crimping process to a part of the inner peripheral surface of the hollow silk film shell 103. The injection-molded part 106 is prevented from peeling off from the hollow filament membrane shell 103, and although a load due to water pressure acts on the injection-molded part 106 during water supply, since the projections and recesses are formed on the injection-molded part 106 along the projections and recesses of the wrinkles, the projections and recesses are engaged with each other, and the injection-molded part 106 is not peeled off from the hollow filament membrane shell 103.

The material of the hollow fiber membrane shell 103 is preferably an amorphous resin having good affinity with the adhesive, and if safety is taken into consideration, it is preferably ABS resin or polystyrene.

As the hollow fiber membrane bundle 105, a hydrophilized polysulfone hollow fiber membrane was used. Polysulfone is excellent in biological properties, heat resistance, chemical resistance and the like, and is preferably used as a water purifier. In addition to polysulfone, hollow fiber membranes of polyacrylonitrile, polyphenylene sulfone, polyether sulfone, polyethylene, and polypropylene may be used. A plurality of kinds of hollow fiber membranes different in material may be combined. When a hollow fiber membrane of polyethylene or polypropylene, which is hydrophobic, is incorporated, air mixed in water can be efficiently discharged. The hollow fiber membrane has a pore diameter of 0.1 to 0.3 μm, and is most suitable for capturing turbid materials in tap water. The hollow fiber membrane has an outer diameter of 300 to 600 μm, an inner diameter of 180 to 340 μm, and a membrane thickness of 50 to 150 μm, and has sufficient strength. The hollow fiber membrane case 103 is not broken in the process of bending the hollow fiber membrane case into a U shape or in the process of pressing the hollow fiber membrane case into the U shape during the manufacturing.

Since the cross-sectional area of only the hollow fiber membranes of the hollow fiber membrane bundle 105 is set to 45 to 55% of the cross-sectional area of the opening 125 of the hollow fiber membrane shell 103, the hollow fiber membrane bundle has a high turbidity filtration capability and can be used for a long period of time. If the amount is less than 45%, the membrane area of the hollow fiber membranes becomes small, and if the amount is more than 55%, the turbid materials do not reach the inside of the dense bundle of hollow fiber membranes, and in either case, the turbid filtration ability is lowered and the hollow fiber membranes cannot be used for a long period of time. When the outer diameter of the hollow fiber membrane is 300 to 600 μm, the membrane has strength and is sufficiently thin, so that a sufficiently large membrane area can be secured in a small case. This also becomes a factor for exerting a high turbidity filtering ability.

As the injection molded article (potting) 106, polyurethane, epoxy resin, or the like can be suitably used in a two-component mixing type in which a flowable main agent and a curing agent are mixed and cured. They may be solidified by centrifugation, standing, or the like.

A flange portion that engages with a later-described connection cap 104 is provided on the outer peripheral side of the end portion of the hollow fiber membrane case 103 that is sealed and fixed by an injection-molded member 106.

The connection cap 104 shown in fig. 13, 19 (a), and 19 (B) includes a large tube 131 and a small tube 132, and has a 1 st connection portion 135 with the hollow fiber membrane housing 103 on the inner peripheral side of one end of the large tube 131, and a 2 nd connection portion 134 with the inner cylinder 93 of the filter main body 82 on the outer peripheral side of one end of the small tube 132. The inner periphery of the 1 st joint 135 is engaged with the outer periphery of the flange provided on the hollow fiber membrane shell 103 without play. In the engaged state, the horn of the ultrasonic welding machine is brought into contact with the connection cap 104 side, and vibration energy is applied while applying pressure, thereby welding the connection cap 104 to the hollow fiber membrane shell 103. The welding method may be any of a butt joint method, a step joint method, a shared joint (share joint) method, a bead joint (bead joint) method, and the like, and is not particularly limited. The connection cap 104 and the hollow silk membrane shell 103 may be connected by fitting, not by ultrasonic welding. An elastic member such as an O-ring may be interposed between the connection cap 104 and the hollow fiber membrane case 103.

An O-ring 136 is fitted into an annular groove of the 2 nd connecting portion 134 of the small tube 132. Since the connection cap 104 is connected to the filter main body 82 via the O-ring 136, the purified water and the raw water (tap water not purified) are not mixed.

When the connection cap 104 is connected to the hollow fiber membrane shell 103 by ultrasonic welding, the same material as the hollow fiber membrane shell 103 is used. ABS resin, AS resin, polyacetal, polycarbonate, polystyrene, which have high dimensional accuracy under molding, can be used. When the hollow fiber membrane shell 103 is connected by fitting, relatively soft polyethylene or polypropylene is used. In the case of polyethylene or polypropylene, the metal mold in the undercut (undercut) portion is easily forcibly pulled out, and the cost for producing the metal mold becomes low. Since the film is relatively flexible, it is easy to embed the film in the production, and the productivity is improved.

Further, a protrusion 244 is disposed on the outer peripheral surface of the large cylinder 131. Since the center axis of the connection cap 104 can be easily aligned with the center axis of the filter main body 82, it is preferable in that the assembling workability is improved.

Next, the installation of the water purifier 1 will be described. The water purifier 1 of the present invention is not particularly limited to the installation place, but if it is used as an under-sink type water purifier installed under a sink of a cabinet, the conventional problems can be solved, and it is effective.

The raw water inlet pipe 7 and the purified water outlet pipe 8 of the water purifier filter head 3 are connected to a water purifier faucet (not shown) of the cabinet. When the lever of the water purifier faucet is turned to turn on the water purifier faucet, tap water is supplied to the raw water inlet pipe 7 from a valve mechanism incorporated in the water purifier faucet. The purified water purified by the water purifier 1 returns to the water purifier faucet through the purified water delivery pipe 8, and is discharged from the discharge port of the water purifier faucet without passing through the valve mechanism. That is, the water purifier 1 is provided downstream of a valve mechanism incorporated in a faucet for a water purifier so that water pressure does not act on the water purifier 1 when water is stopped. Is a so-called type II water purifier. However, the water purifier 1 of the present invention is not limited to the type II. It is also possible to use the water purifier as a so-called I-type water purifier in which water pressure acts on the water purifier 1 when stopping water.

Next, the purification of the tap water in the water purifier 1 will be described. As shown by arrows in fig. 3 and 12, in the water purifier according to the present invention, if a water purifier faucet (not shown) is opened, raw water flows into the raw water inlet pipe 7 of the filter head 3 for the water purifier and is introduced into the raw water inlet 86 of the filter main body 82 of the filter cartridge 2. Here, when the filter cartridge 2 is not attached to the filter head 3 for a water purifier, the

check valves

213 and 214 close the flow path, and thus, it is possible to prevent a trouble that tap water is discharged due to the incomplete attachment of the filter cartridge 2.

When a lever of a water purifier faucet (not shown) is turned, for example, to open the water faucet, tap water flows into the raw water inlet 86 of the filter cartridge 2 through the raw water flow path 224 of the filter head connecting portion 5 of the water purifier filter head 3. The gas flows uniformly from the outer diameter side to the inner diameter side of the cylindrical powder filter medium 102, so that the free residual chlorine in the tap water is decomposed and the volatile organic compounds in the tap water are adsorbed and removed. Then, the water reaches the inner tube 206 inside the cylindrical powder filter medium 102, flows upward, passes through the rectifying plate 202, and reaches the ion exchanger 203. Water flows from the lower side to the upper side of the ion exchanger 203, and the lead component is removed. Then, the water flows from the outer diameter side to the inner diameter side of each hollow fiber membrane of the hollow fiber membrane bundle 105, and the turbid materials and bacteria in the water are captured by the hollow fiber membranes. The purified water having passed through the hollow fiber membrane bundle 105 is discharged from the purified water discharge port 88 of the filter cartridge 2, and is discharged from the discharge port of the water purifier faucet as it is through the purified water flow path 225 of the filter head connecting portion 5. The user can obtain clean water with good taste and safety.

Finally, replacement of the filter cartridge 2 of the water purifier 1 will be described. If the filter cartridge 2 is rotated 90 degrees counterclockwise, the filter cartridge 2 is easily separated from the filter head 3 for a water purifier by the bayonet mechanism.

Next, the unused filter cartridge 2 is attached to the filter head 3 for a water purifier. If the tip of the unused cartridge 2 is inserted into the filter head 3 for a water purifier, the center axis 242 of the cartridge 2 is naturally aligned with the center axis 241 of the filter head 3 for a water purifier. If the unused filter cartridge 2 is rotated 90 degrees clockwise after reaching the touch of the filter head 3 for a water purifier, the unused filter cartridge 2 can be reliably attached to the filter head 3 for a water purifier.

< example >

The particle diameters shown in the examples were measured by using a laser diffraction particle size distribution measuring apparatus (model SALD-3100, manufactured by Shimadzu corporation) for a part of a material obtained by stirring a small amount of a sample in pure water. The inside of the sample tank of the apparatus was always stirred, and after 1 minute of ultrasonic treatment was performed in a state where the sample tank was circulated from the sample tank to the cells, the particle size distribution was measured.

(example 1)

Coconut shell activated carbon was used as the powder filter. The particle diameter D50 when the cumulative value of the volume-based particle size distribution was 50% was 197 μm, the particle diameter D90 when the cumulative value of the volume-based particle size distribution was 90% was 295 μm, and the particle diameter D10 when the cumulative value of the volume-based particle size distribution was 10% was 141 μm. The activated carbon was packed in a cartridge having the structure of fig. 3, and the pressure loss value (1) was measured to show a flow rate of 3.5L/min. Then, the pressure loss value (2) of the filter cartridge from which the powder filter medium was removed was measured, and the pressure loss value (2) was subtracted from the pressure loss value (1) to calculate the pressure loss value (3) of the powder filter unit. The pressure loss in the powder filter portion is very small.

(example 2)

The pressure loss was measured in the same manner as in example 1, except that coconut shell activated carbon having a particle size D50 of 211 μm when the cumulative value of the volume-based particle size distribution was 50%, a particle size D90 of 319 μm when the cumulative value of the volume-based particle size distribution was 90%, and a particle size D10 of 143 μm when the cumulative value of the volume-based particle size distribution was 10% was used as the powder filter medium. The pressure loss was higher than that in example 1, but there was no problem in practical use.

(reference example 1)

The pressure loss was measured in the same manner as in example 1, except that coconut shell activated carbon having a particle size D50 of 199 μm when the cumulative value of the volume-based particle size distribution was 50%, a particle size D90 of 319 μm when the cumulative value of the volume-based particle size distribution was 90%, and a particle size D10 of 116 μm when the cumulative value of the volume-based particle size distribution was 10% was used as the powder filter medium. The pressure loss is higher than 0.018 MPa.

The conditions of the powder filter media of examples 1 and 2 and reference example 1 are shown in table 1, and the pressure loss values are shown in table 2. When the pressure loss value (3) of the powder filter portion at the time of 3.5L/min water passage was 0.018MPa or less, there was no practical problem.

[ Table 1 ]

	Particle diameter D10 [ mu m ]	Particle diameter D50 [ mu m ]	Particle diameter D90 [ mu m ]	（D90－D10）/D50
					Example 1	141	197	295	0.78
Example 2	143	211	319	0.83
					Reference example 1	116	199	319	1.02

[ Table 2 ]

	Pressure loss value of filter cartridge (1) [ MPa ]	The pressure loss value (2) [ MPa ] of the filter cartridge from which the powdery filter material was removed	Pressure loss value (3) [ MPa ] of powder filter part
				Example 1	0.0790	0.0687	0.0103
Example 2	0.0844	0.0687	0.0157
				Reference example 1	0.0876	0.0687	0.0189

Next, an embodiment of a water purifier bracket according to the present invention will be described with reference to the drawings. As shown in fig. 20, a water purifier holder 300 is attached to, for example, a holder 301 for holding the filter cartridge 2 of the water purifier 1 from a direction perpendicular to the center axis of the column of the water purifier in a back side wall (not shown) of the space under the water tank of the cabinet. The water purifier holder 300 includes two holding members 301 having openings 312 and a mounting member 302 fixed to a wall surface, and holds the outside of the cylindrical filter cartridge 2 by the two upper and lower holding members 301 (the 1 st and 2 nd holding portions 305 and 306).

Fig. 21 is a perspective view showing the water purifier holder 300 when the water purifier 1 is vertically mounted as shown in fig. 20. The holding member 301 has a substantially C-shape, and the inner diameter dh of the holding member 301 is preferably 0.9df to 1df inclusive with respect to the outer diameter df of the filter cartridge 2 shown in fig. 24. If the inner diameter dh is 0.9df or more, removal can be performed with moderate force when removing the filter cartridge 2. If the inner diameter dh is 1df or less, the filter cartridge 2 can be prevented from falling out.

Further, the space between both ends of the opening 312 of the holding member 301 is smaller than the diameter of the cylindrical filter cartridge 2, and the opening end 319 of the opening 312 has an introduction shape with the front opened to improve the insertion property, thereby ensuring a secure attachment feeling after the insertion of the filter cartridge 2. The opening distance dp of the opening tip 319 is preferably 0.7df to 0.9df of the outer diameter df of the filter cartridge 2 shown in fig. 24. If the opening distance dp is 0.7df or more, the filter cartridge 2 can be removed with an appropriate force when removed. If the opening distance dp is 0.9df or less, the filter cartridge 2 can be prevented from falling off. Furthermore, the reinforcing rib 318 is provided at the opening front end 319, and when the filter cartridge 2 is in contact with the opening front end 319 and a force is applied, the opening front end 319 can be prevented from being deformed or broken. Further, the reinforcing ribs 318 also have an improved effect as reinforcing ribs for improving strength for firmly holding the filter cartridge 2 by the substantially C-shaped holding members 301.

In the present embodiment, the holding member 301 and the attachment member 302 have two locking portions; first, the holding member 301 is provided with a 1 st locking portion 313 of the mounting member, and the 1 st locking portion 313 is disposed on a 1 st central axis 314 in the same direction as the opening direction of the opening 312, is convex toward the mounting member 302, and has a pair of substantially L-shaped ends. The mounting member 302 is provided with a 1 st engagement target portion 322 having a notch groove shape and fitted to the 1 st locking portion 313. Further, the holding member 301 is provided with a 2 nd locking portion 316, and the 2 nd locking portion 316 has the same shape as the 1 st locking portion 313 and is disposed on a 2 nd center axis 317 different from the opening direction of the opening 312. Similarly, the mounting member 302 is provided with a notch-groove-shaped 2 nd locking part 323 to be fitted to the 2 nd locking part 316.

The 1 st gripping part 305 on the upper side is engaged with the mounting member 302 by fitting the 1 st engagement part 322 and the 2 nd engagement part 323 in the notch groove shape of the mounting member 302 from above the mounting member 302 with the 1 st locking part 313 and the 2 nd locking part 316, which are formed in a pair of substantially L shapes. Similarly, the second grip portion 306 on the lower side has a pair of substantially L-shaped two-position locking portions which are fitted to the two-position notch-groove-shaped locked portions of the attachment member 302 from below the attachment member 302, and are engaged with the attachment member 302. The mounting member 302 is screwed to the wall surface with two small screws 304. By engaging the gripping member 301 and the attachment member 302 with two locking portions in this manner, the two components are stably fixed without shaking, the filter cartridge 2 can be firmly held in a normal state, and the attachment and detachment can be easily performed when the filter cartridge 2 is replaced. The fixing of the gripping member 301 and the attachment member 302 may be by screw fastening or claw fitting, and the mode is not limited.

The cylindrical filter cartridge 2 is inserted through the openings 312 of the two gripping members 301, and the shapes thereof are matched tightly with each other, so that the elastic force of the gripping members can reliably grip the filter cartridge without loosening. The distance D between the outer ends of the 1 st gripping part 305 and the 2 nd gripping part 306 shown in fig. 22 is preferably 0.35Lf to 0.9Lf with respect to the entire length Lf of the filter cartridge 2 shown in fig. 24. If the distance D is 0.35Lf or more, the filter cartridge can be stably held even if the entire length is long. If the distance D is 0.9Lf or less, the filter cartridge 2 can be prevented from falling off even when the filter cartridge moves in the longitudinal direction thereof. Further, if the width of the portion of the gripping member 301 that grips the filter cartridge is sufficiently large, only one gripping member 301 may be engaged with the attachment member 302, and only one gripping member 301 may grip the filter cartridge 2.

In the embodiment of fig. 20 and 21, since the insertion direction of the filter cartridge 2 into the opening of the holding member 301 is perpendicular to the wall surface, even if the filter cartridge 2 is attached to the back wall of a limited space under the cabinet sink, the filter cartridge 2 can be easily attached and detached by inserting a hand straight.

The holding member 301 and the mounting member 302 may be made of resin such as ABS resin, polycarbonate, polystyrene, or polypropylene, or metal such as stainless steel, brass, or bronze. Among these, there is an advantage in that, with respect to the appearance and the manufacturing cost, the ABS resin or the polypropylene having a good appearance is manufactured by injection molding, and the filter cartridge 2 is easily attached and detached.

Fig. 22 is a perspective view of an example of a right upper corner (not shown) of a storage space provided under a sink of a cabinet. The water purifier holder 300 can be installed at the upper left corner (not shown) of the storage space under the cabinet sink by turning it left and right. The filter cartridge 2 is arranged horizontally with respect to the vertical arrangement of the filter cartridge 2 of fig. 20. The angle (acute angle) formed between the insertion direction of the filter cartridge 2 into the opening 312 of the holding member 301 and the direction perpendicular to the wall surface is preferably 10 degrees to 90 degrees. If the angle is 10 degrees or more, the filter cartridge 2 can be replaced from an oblique direction avoiding the water tank of the cabinet even if the filter cartridge 2 cannot be attached and detached in the lateral direction, for example, when there is an obstacle in the front direction of the holding member 301, or when the upper right corner or the upper left corner of the storage space under the water tank of the cabinet is narrow. Further, the direction along the wall surface in the insertion direction of the filter cartridge 2 is the direction having the largest angle, and therefore the angle is naturally 90 degrees or less. Further, since the weight of the filter cartridge 2 acts downward, it can be detached with a smaller force than in the case of vertical attachment. The removal force F of the filter cartridge 2 is preferably 0.5M kg to 2.0M kg, relative to the weight M kg of the filter cartridge when full of water. If the removal force F is 0.5M kg or more, the filter cartridge 2 can be prevented from falling off. If the removal force F is 2.0M kg or less, the filter cartridge 2 can be removed with an appropriate force when removed.

In the embodiment of fig. 22, the holding member 301 is attached to the attachment member 302 such that the insertion direction of the filter cartridge 2 into the opening 312 is 45 degrees downward with respect to the direction perpendicular to the wall surface.

Fig. 23 is a side view of the holding member 301 attached so that the direction of insertion of the filter cartridge 2 into the opening 312 is 45 degrees downward with respect to the direction perpendicular to the wall surface. Hereinafter, the direction in which the center axis of the column of the filter cartridge 2 is oriented in the state in which the grip member 301 grips the filter cartridge 2 is referred to as the center axis direction, and the direction in which the grip member 301 of the embodiment of fig. 20 and 21 engages with the attachment member 302 is referred to as the 1 st direction. The gripping member 301 is attached to the attachment member 302 by engaging the central axis direction thereof with the 2 nd direction reversed from the 1 st direction. The 1 st locking portion 313 of the holding member 301 faces obliquely upward and engages with the 2 nd locked portion 323 of the mounting member 302, and the 2 nd locking portion 316 faces horizontally and engages with the 1 st locked portion 322 of the mounting member 302 so as to be mounted vertically to the wall surface. Since the 1 st locking portion 313 is disposed on the 1 st central axis 314 in the same direction as the opening direction of the opening 312, the opening direction of the opening 312 of the gripping member 301 can be directed obliquely downward according to the engagement mode. In this way, the angle of the opening direction of the opening 312 of the gripping member 301 with respect to the wall surface can be changed by the difference in angle between the 1 st central axis 314 and the 2 nd central axis 317 simply by reversing the engagement direction of the gripping member 301 with respect to the mounting member 302. That is, the water purifier holder 300 can change the opening direction angle of the opening 312 of the wall-facing gripping member 301 in two different ways depending on the mounting location, and as a result, the filter cartridge 2 can be easily replaced.

Of course, the 1 st locking part 313 and the 2 nd locking part 316 of the gripping member 301 and the 1 st locked part 322 and the 2 nd locked part 323 of the mounting member 302 have the following shapes: when the grip member 301 is engaged with the attachment member 302 in the 1 st direction, the 1 st locking portion 313 can be engaged with the 1 st locked portion 322, and the 2 nd locking portion 316 can be engaged with the 2 nd locked portion 323, and when the grip member 301 is engaged with the attachment member 302 in the 2 nd direction, the 1 st locking portion 313 can be engaged with the 2 nd locked portion 323, and the 2 nd locking portion 316 can be engaged with the 1 st locked portion 322. The 1 st locking part 313 and the 2 nd locking part 316 may be notch groove-shaped, and the 1 st locked part 322 and the 2 nd locked part 323 may be convex.

Further, if the gripping member 301 and the attachment member 302 are engaged with each other by two locking portions, these two components are stably fixed, but in order to further increase the stability, another locking portion may be provided between the 1 st locking portion and the 2 nd locking portion, and another locking portion may be provided between the 1 st locking portion and the 2 nd locking portion, so that these can be engaged with each other.

Fig. 25 is a perspective view showing an example of a method of assembling the holding member 301 to the mounting member 302. As shown in fig. 25, the holding member 301 is attached from the outside in the longitudinal direction of the attachment member 302. At this time, the reinforcing ribs 315 of the holding member 301 are made to pass over the mounting ribs 324 of the mounting member 302. Thus, the grip member 301 can be reliably attached after obtaining the feeling that the grip member 301 reaches the attachment member 302, and the grip member 301 does not easily fall off from the attachment member 302.

In order to perform the replacement work of the filter cartridge in the space under the water tank more efficiently, the angle (acute angle) formed between the insertion direction of the filter cartridge 2 in the state of being engaged in the 1 st direction into the opening 312 of the grip member 301 and the insertion direction of the filter cartridge 2 in the state of being engaged in the 2 nd direction into the opening 312 of the grip member 301 is preferably 10 degrees to 90 degrees. If the angle is 10 degrees or more, the insertion direction of the filter cartridge 2 can be sufficiently changed, so even if the filter cartridge cannot be inserted due to an obstacle in the housing space at the bottom of the cabinet tub in the state of being engaged in the 1 st direction, for example, the filter cartridge 2 can be inserted while avoiding the obstacle by being engaged in the 2 nd direction. Further, since the insertion direction of the filter cartridge 2 is often perpendicular to the wall surface under the cabinet sink, for example, when the insertion direction of the filter cartridge 2 is perpendicular to the wall surface in the state of being engaged in the 1 st direction, the direction along the wall surface is naturally the direction having the largest angle among the insertion directions of the filter cartridge 2 in the state of being engaged in the 2 nd direction, and therefore the angle is preferably 90 degrees or less. Since the stored items are often placed below the storage portion of the lower portion of the cabinet sink, the angle is more preferably 60 degrees or less.

Further, the holding member 301 has a plurality of reinforcing ribs 315 protruding in the radial direction. In order for the substantially C-shaped gripping member 301 to firmly grip the filter cartridge 2, the reinforcing ribs 315 abutting against the mounting member 302 on the outer sides of the two convex shapes also have an improved effect as reinforcing ribs for improving the strength of the base portions of the gripping members.

Further, if two or more open holes are provided in the mounting member 302, and a binding tape, a surface fastener (surface ファスナー), a binding cord, or the like is passed through the open holes, wound around the filter cartridge, and bound, the filter cartridge 2 can be more reliably held and fixed.

The fixing means of the mounting member of the water purifier bracket 300 to the wall of the space below the water tank may be screw-fastened or strong double-sided tape, and the fixing means is not limited.

Finally, an example of a method of replacing the filter cartridge 2 of the water purifier 1 will be described. When the filter cartridge of the water purifier of the present invention is attached and detached, if the filter cartridge 2 is rotated 90 degrees counterclockwise, the filter cartridge 2 is easily detached from the filter head 3 for the water purifier by the bayonet mechanism.

Next, the unused filter cartridge 2 is attached to the filter head 3 for a water purifier. If the front end of the unused filter cartridge 2 is inserted into the filter head 3 for a water purifier, the central axis of the filter cartridge 2 is naturally aligned with the central axis of the filter head 3 for a water purifier. If the unused filter cartridge 2 is rotated 90 degrees clockwise after the tactile sensation of reaching the filter head 3 for a water purifier is obtained, the unused filter cartridge 2 can be reliably attached to the filter head 3 for a water purifier.

The present application is based on japanese patent application No. 2016-.

Industrial applicability

The present invention relates to a water purifier for purifying tap water, and more particularly, to an under-tank type water purifier installed in a space on a lateral side or below a water tank, and can be applied to all water purifiers such as a wall-mounted type water purifier and a vertical type water purifier. The water purifier is not limited to the water purifier under the water tank.

The present invention relates to a holder for a water purifier for purifying tap water in a space below a water tank of a cabinet, and more particularly to a holder for a water purifier below a water tank. The water purifier is not limited to the water purifier under the water tank.

Description of the reference numerals

1 Water purifier

2 Filter cartridge

3 Filter head for water purifier

4 filter head fixing plate

5 Filter head connecting part

6 Flange

7 raw water inlet pipe

8 purified water delivery pipe

11 pipe head

13 pipe joint part

14 head

15 fastening parts (sleeve for pressing)

16 flexible pipe body

17 opening part

18 opening part

22 inner diameter side flow path

23 opening part

24 bottom surface

25 upper surface of the container

26 inner cylinder

27 outer cylinder

28 raised edge part

32 opening

33 outer rib

34 support frame

35 opening part

36 filter element

38 hollow fiber membrane module

82 filter body

86 raw water receiving port

87 small diameter O-shaped ring

88 clean water jet hole

89 large-diameter O-shaped ring

91 convex part

92 convex part

93 inner cylinder

102 powder filter material

103 hollow fiber membrane shell

104 connecting cap

105 hollow fiber membrane bundle

106 injection molded part

125 opening

131 big tube

132 canister

134 the 2 nd connecting part

135 th connection part

136O-shaped ring

201 bottom cover

202 rectifying plate

203 ion exchanger

204 inner side wall

205 outer cylinder

206 inner cylinder

207 inner cover

208 annular shell

209 inner rib

210 elastic member

211 outer rib

212 lower end opening part

213 check valve

214 check valve

215 movable axis

216 spring

217 convex part

218 inclined part

219 projection

220 into the recess

222 straight tube section

223 head end face

224 raw water flow path

225 purified water flow path

226 has a bottom cylinder part

227 fixing parts (self-tapping screw)

228O-shaped ring

229O-shaped ring

230 partial diameter expanding part

231 partial expanding part

232 closed space

233 1 st cylindrical part

234 No. 2 cylindrical part

235 part of expanding part

236 part diameter expanding part

237 Rib

238 gap

239 inner side wall surface

240 inner rib

241 center axis

242 central axis

243 projection

244 protrusion

245 Rib

246 upper surface of the container

247 open pore

248 plane of inner cylinder

249 powder filtering material module

300 support for water purifier

301 holding member

302 mounting component

304 small screw

305 No. 1 gripping part

306 nd 2 grip part

312 opening part

313 st 1 locking part

314 1 st central axis

315 stiffening rib

316 nd 2 nd stop part

317 center shaft 2

318 reinforcing rib

319 front end of opening part

322 1 st locked part

323 the 2 nd latched part

324 receive the ribs.

Claims

1. A filter cartridge for a water purifier comprises a cylindrical filter body, a cylindrical powder filter material module for accommodating a powder filter material, and a cylindrical hollow fiber membrane module for accommodating a hollow fiber membrane, wherein the filter body is provided with a raw water receiving port and a purified water discharge port, and the powder filter material module and the hollow fiber membrane module are coaxially accommodated in the filter body;

the water entering from the raw water receiving port passes through the inside of the powder filter material module and the inside of the hollow fiber membrane module in sequence and is discharged from the purified water outlet;

it is characterized in that the preparation method is characterized in that,

the powder filter module comprises:

an outer cylinder which prevents the powder filter material from passing through but allows water to pass through;

an inner cylinder disposed inside the outer cylinder, for preventing the powder filter material from passing through but allowing water to pass through;

an upper inner lid which is liquid-tightly connected to one end of the outer cylinder and one end of the inner cylinder, and which closes a space between the one end of the outer cylinder and the one end of the inner cylinder to form an opening communicating with a space on an inner diameter side of the inner cylinder;

a bottom cover liquid-tightly connected to the other end of the outer cylinder and the other end of the inner cylinder, and sealing a space between one end of the outer cylinder and one end of the inner cylinder and a space on an inner diameter side of the inner cylinder; and

the powder filter material is accommodated in a space surrounded by the outer cylinder, the inner cylinder, the upper inner cover, and the bottom cover;

one end of the hollow fiber membrane module is connected to the purified water discharge port in a liquid-tight manner, and the other end is connected to the upper inner lid of the powder filter module in a liquid-tight manner directly or via another member;

the particle diameter D90 when the cumulative number of the powder filters arranged in the order of particle diameter is 90%, the particle diameter D10 when the cumulative number is 10%, and the particle diameter D50 when the cumulative number is 50% satisfy the condition of 0.5-0.5 (D90-D10)/0.9-0.82.

2. A filter cartridge for a water purifier as recited in claim 1,

the raw water receiving port and the purified water discharge port are provided at one end of the filter main body;

a water passage is formed to connect a gap between the filter body and the outer cylinder of the powder filter material module, a gap between the filter body and the upper inner cap of the powder filter material module, and a gap between the filter body and the hollow fiber membrane module, and to communicate with the raw water receiving port.

3. A filter cartridge for a water purifier as recited in claim 2,

the bottom cover of the powder filter module also serves as a cover for closing the other end of the filter body opposite to the one end thereof where the raw water inlet and the purified water outlet are provided.