TWI733947B - Filter for water purifier - Google Patents

Abstract

A filter element for a water purifier, comprising: a cylindrical filter body; and a cylindrical powder filter material module and a cylindrical hollow fiber membrane module, which are coaxially housed in the filter body, and The powder filter material module contains a powder filter material, and the hollow fiber membrane module contains a hollow fiber membrane; one end of the hollow fiber membrane module is liquid-tightly connected to the water purification outlet, and the other end is connected to the powder filter material mold. The inner cover above the group is connected directly or liquid-tightly through other components, and the powder filter material is arranged in the order of particle size, when the cumulative number reaches 90% of the particle size D90, and the cumulative number reaches 10% of the particle size D10, And the particle size D50 whose cumulative number reaches 50% satisfies 0.5≦(D90-D10)/D50≦0.9.

Description

Filter for water purifier

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

Conventionally, as water purifiers for purifying tap water, there are known water purifiers directly connected to the tap directly connected to the spit of the tap, fixed water purifiers used on the cabinet, and placed inside the cabinet. And use the sink type (or embedded) water purifier, etc. Since the total amount of filtered water that can be processed by the filter material filled in a filter element for a water purifier is limited, users continue to use the water purifier while regularly replacing the filter element for the water purifier.

The under-tank water purifier is larger than the faucet directly connected water purifier or the fixed water purifier, and the total filtered water that can be processed is also larger, so it can be used for a long time. Since there is no water purifier installed near the water faucet or sink of the cabinet, it will not hinder the operation.

As an under-tank type water purifier, as for example in Patent Document 1, there is known a water purifier that is provided with a raw water inlet and a purified water outlet, and is connected to a hose with a quick-plug connector attached to the front end and used. The user places the filter element for the water purifier on the bottom surface of the space under the sink, and connects the hose for supplying raw water and the hose for spitting out purified water. If you operate the faucet of the cabinet, you can easily obtain clean water.

However, this type of water purifier is usually installed inside the accommodating part of the washing station. In order to take out the water purifier, it is necessary to take out the items stored nearby, which has the problem of time-consuming and labor-intensive replacement. In addition, there are problems such as that when the quick-plug connector is removed from the filter element and a new filter element is installed when the filter element is replaced, an installation error occurs for the quick-plug connector in the raw water inlet and the purified water outlet.

On the other hand, as in Patent Document 2, for example, the following water purifier is known, which is composed of the following components: a holder having a raw water inlet and a purified water outlet; and a filter element that is detachably assembled to the The bracket has a raw water inlet and a purified water outlet; the bracket is provided with a rotating filter core fixing means, and a raw water inlet pipe is connected to the raw water inlet, and a purified water outlet pipe is connected to the purified water outlet. Since the self-support is directly connected to the filter element, there is no need for water supply pipes such as hoses, and no hoses need to be connected when the filter element is replaced.

In addition, in the water purifier of Patent Document 1, the adsorbent portion is arranged on the radially outer side of the hollow fiber membrane bundle. As a result, the outer diameter of the filter element becomes larger, and there is also a problem that the storage space under the cabinet cannot be ensured.

In contrast, as in Patent Document 3, for example, there is a filter element for a water purifier in which formed activated carbon and a hollow fiber membrane are sequentially arranged coaxially from the downstream side. With this structure, the volume of the filter material to ensure the required filtering capacity can be ensured, and the outer diameter of the filter element can be reduced.

Furthermore, the arrangement of placing the filter element for water purifiers in the bottom surface of the space under the sink as in Patent Document 1 reduces the storage space under the cabinet, and it has become the mainstream cabinet in recent years where drawers are installed in the space under the sink. Therefore, as in Patent Document 4, it is also proposed to suspend and install a water purifier in the space under the ceiling of the cabinet sink.

[Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open 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. 2006-169784

[Question 1]

However, in the bracket proposed in Patent Document 2, there is a risk that when the other end of the raw water inlet pipe and the purified water outlet pipe is connected to the water purifier faucet, the raw water inlet pipe and the purified water outlet pipe may occur. Twist, the twist is transmitted to the water purifier faucet side, and water leakage occurs from the connection part with the water purifier faucet. In addition, there is a possibility that water leakage occurs when a high water pressure is applied at the connection portion between the raw water introduction pipe and the raw water inlet, and the purified water outlet pipe and the purified water outlet.

Therefore, the present invention provides a water purifier which prevents self-purification by preventing twisting when connecting the water purifier faucet with the raw water introduction pipe and the purified water outlet pipe by enabling the raw water introduction pipe and the purified water outlet pipe to be rotated. The connection part of the water faucet leaks, and the pipe head fittings and the hose body constituting the raw water inlet pipe and the purified water outlet pipe are pressed and fixed by the fastening member, thereby, even when high water pressure is applied In case of situation, it can also prevent water leakage.

[Question 2]

In addition, the formed activated carbon used in the filter proposed in Patent Document 3 must add a binder other than the activated carbon when forming the activated carbon, and the amount of activated carbon is reduced in order to form a predetermined volume. By using the powder filter material instead of the formed activated carbon, the filter material occupied by the binder contributes to the filtration. Therefore, the filter capacity can be improved. Generally, if the particle size is reduced, the water flow of the powder filter material will be effective. The pressure loss becomes larger, and the established filtration flow cannot be ensured.

Therefore, the present invention provides a filter element for a water purifier that can ensure the required filtering capacity in a compact shape without reducing the storage space at the lower part of the cabinet sink when it is installed in the storage space under the cabinet sink.

[Question 3]

In addition, in the structure described in Patent Document 4, the water purifier is fixed to the lower part of the top plate of the cabinet. Therefore, when replacing the filter element for the water purifier, it is necessary to penetrate into the storage space under the cabinet, which is difficult. It is time-consuming and laborious to proceed.

In view of the above-mentioned problems, the present invention aims to provide a stand for a water purifier and a water purifier having the stand. The storage space in the lower part of the sink is reduced, and the replacement of the filter element for the water purifier is easy and the replacement of the filter element for the water purifier is not time-consuming and labor-intensive.

[Means to solve the first problem]

(1-1) The water purifier of the present invention that solves the first problem described above has a filter element containing a filter material and a filter head for a water purifier capable of attaching and detaching the filter element. The filter head for the water purifier has: a filter head connection part , Which is connected to the filter element; a raw water inlet pipe, which is arranged at the filter head connection part and is used to introduce raw water into the filter element; and a purified water outlet pipe, which is arranged at the filter head connection part and is used to The purified water after the heart purification is exported; the raw water inlet pipe and the purified water outlet pipe are respectively composed of the following components: a pipe head fitting, which consists of a cylindrical head and a cylindrical threaded pipe extending from the head Structure, and formed in the center part with a flow path penetrating the head and the threaded joint part; a hose body inserted into the threaded joint part; and a fastening member installed on the outer periphery of the hose body to connect the hose The body is pressed to the threaded connection part to fix it; and the head of the pipe head fitting of the raw water introduction pipe and the head of the pipe head fitting of the water purification outlet pipe are respectively arranged in two of the filter head connection parts. The circular insertion concave portion is fixed by a fixing means so as not to fall off from the insertion concave portion, whereby the raw water introduction pipe and the purified water outlet pipe are respectively fixed to the filter head in a rotatable manner.

(1-2) In addition, in the water purifier of the present invention, it is preferable that the pipe head fitting of the raw water introduction pipe and the pipe head fitting of the purified water outlet pipe respectively have the outer diameter of the head larger than that of the threaded connection part. The fixing means is composed of the following members: a fixing plate formed with one or two openings of a size that does not allow the head to penetrate but the threaded pipe portion to penetrate; and a fixing member that fixes the fixing plate to The filter head connection part; and the fixing plate is configured to allow the portion other than the head of each of the raw water introduction pipe and the purified water outlet pipe to penetrate the opening of the fixing plate, and the head is arranged in the insertion recess In the state of being fixed to the filter head connection part by a fixing member, the raw water introduction pipe and the purified water outlet pipe are respectively fixed to the filter head in a rotationally movable manner.

[Means to solve the second problem]

(2-1) The filter element for a water purifier of the present invention that solves the above-mentioned second problem is provided with: a cylindrical filter body provided with a raw water inlet and a purified water outlet; and a cylindrical powder filter material module and A cylindrical hollow fiber membrane module, which is coaxially accommodated in the filter body, and the powder filter material module accommodates a powder filter material, and the hollow fiber membrane module accommodates a hollow fiber membrane; The filter element for a water filter has a structure in which the water entering from the raw water inlet passes through the inside of the powder filter material module, the inside of the hollow fiber membrane module, and flows out from the water purification outlet. The powder The filter material module is equipped with: an outer cylinder, which does not allow the powder filter material to pass through but water supply; an inner cylinder, which is arranged inside the outer cylinder and does not allow the powder filter material to pass through but water supply passes; an upper inner cover, which Liquid-tightly connected with one end of the outer cylinder and one end of the inner cylinder to close the space between one end of the outer cylinder and one end of the inner cylinder, and a space communicating with the inner diameter side of the inner cylinder is formed Opening; bottom cover, which is connected liquid-tightly with the other end of the outer cylinder and the other end of the inner cylinder, connecting the space between one end of the outer cylinder and one end of the inner cylinder and the inner diameter side of the inner cylinder The space is closed; and the powder filter material is housed in a space surrounded by the outer tube, the inner tube, the upper inner cover, and the bottom cover; the hollow fiber membrane module is liquid-tight at one end of the water purification outlet Ground connection, the other end of which is connected directly or liquid-tightly with the upper inner cover of the powder filter material module, or through other components. The powder filter material is arranged in order of particle size and the cumulative number reaches 90% of the particle size D90, the particle size D10 with the cumulative number reaching 10%, and the particle size D50 with the cumulative number reaching 50% satisfy 0.5≦(D90-D10)/D50≦0.9.

(2-2) Furthermore, in the filter element for a water purifier of the present invention, it is preferable that the raw water inlet and the purified water outlet are provided at one end of the filter body, and the filter body and the powder filter material module The gap between the outer cylinder, the gap between the filter body and the upper inner cover of the powder filter material module, and the gap between the filter body and the hollow fiber membrane module are connected to form a water inlet with the raw water Connected waterways.

(2-3) Furthermore, in the filter element for a water purifier of the present invention, it is preferable that the bottom cover of the powder filter material module also serves as an end of the filter body provided with the raw water inlet and the purified water outlet It is a closed cover on the opposite side.

[Means to solve the third problem]

(3-1) The holder for a water purifier of the present invention that solves the above-mentioned third problem, which holds a substantially cylindrical filter element, is characterized in that the filter element is held in a direction perpendicular to the central axis of the cylinder. A member and a mounting member fixed to the wall surface. The holding member has an opening into which the filter element is inserted, and a first locking portion and a second locking portion that are engaged with the mounting member, and the mounting member has an engagement The first locked portion and the second locked portion of the holding member are when the direction in which the central axis of the cylinder of the filter element in the state where the holding member holds the filter element is set as the central axis direction , The first locking portion, the second locking portion, the first locked portion, and the second locked portion are, when the holding member is engaged with the mounting member in the first direction, the first The locking portion is engaged with the first locked portion, the second locking portion is engaged with the second locked portion, and the central axis is aligned in the first direction with respect to the mounting member on the holding member. When engaged in the second direction after the direction is reversed, the first locking portion engages with the second locked portion, the second locking portion engages with the first locked portion, and the first locked portion engages with the first locked portion. 1 The locking portion and the second locking portion are the insertion direction of the filter element into the opening of the holding member in the state of being engaged in the first direction, and the state of being engaged in the second direction The filter element is arranged at the opening in a way that the insertion direction of the filter element to the opening of the holding member is different.

(3-2) Here, it is preferable that the inserting direction of the filter element into the opening of the holding member in the state of being engaged in the first direction is in the state of being engaged in the state of being engaged in the second direction The angle (acute angle) formed by the filter element to the insertion direction of the opening of the holding member is in the range of 10-60 degrees.

(3-3) It is also preferable that the insertion direction of the filter element in the state of being engaged in the first direction into the opening of the holding member is a direction perpendicular to the wall surface.

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

According to the water purifier of the present invention, by rotatably fixing the raw water inlet pipe and the purified water outlet pipe, it is possible to avoid twisting when connecting the water purifier faucet to the raw water inlet pipe and the purified water outlet pipe and prevent self-purification The connection part of the water faucet is leaking.

In addition, according to the preferred aspect of the water purifier of the present invention, the pipe head fitting and the hose body constituted as the raw water inlet pipe and the purified water outlet pipe are compressed and fixed by the fastening member, thereby making it easier to apply pressure. In the case of high water pressure, it can also prevent water leakage.

In addition, according to the water purifier of the preferred aspect of the present invention, since the fixing plate and the filter head connection part are firmly fixed by the fixing member, the fixing plate cannot be removed unless a tool is used. Therefore, the user can be prevented Disassembled by mistake.

According to the filter element for a water purifier of the present invention, since the water is passed in the radial direction from the outer side of the cylindrical powder filter part to the inner side, the pressure loss when the water passes is reduced, and further, due to the particle size distribution relative to the average particle size The width becomes fixed or less, so the pressure loss during water flow can be reduced.

In addition, according to the preferred aspect of the filter element for a water purifier of the present invention, by arranging both the raw water inlet and the purified water outlet at one end of the filter body, the raw water inlet and the purified water outlet can be connected to each other. The outlet piping is concentrated in one place, so the space under the water tank can be ensured.

In addition, according to the preferred aspect of the filter element for a water purifier of the present invention, since the bottom cover of the powder filter material module also serves as a cover for closing the filter body, the number of components can be reduced.

In addition, according to the holder for a water purifier of the present invention, according to the selection of the locking position of the holding member and the above-mentioned mounting member, the opening direction angle of the opening of the holding member with respect to the wall surface can be changed to two types, for example, even when holding When there are obstacles on the side of the member and the filter element for the water purifier cannot be detached in the lateral direction, the filter element for the water purifier can be easily detached from another direction by changing the opening direction of the opening of the holding member. Therefore, you don’t need to worry about obstacles in the vicinity of the installation position of the water purifier bracket, and you can install the water purifier filter horizontally or vertically or at a desired angle on the left and right walls of the limited space at the bottom of the cabinet sink. Therefore, the degree of freedom of installation becomes higher.

1‧‧‧Water purifier

2‧‧‧Filter

3‧‧‧Filter head for water purifier

4‧‧‧Filtration head fixing plate

5‧‧‧Filter head connection

6‧‧‧Flange

7‧‧‧Raw water inlet pipe

8‧‧‧Water outlet pipe

11‧‧‧Tube head accessories

13‧‧‧Threaded connection part

14‧‧‧Head

15‧‧‧Fastening member (compression sleeve)

16‧‧‧Hose body

17‧‧‧Opening

18‧‧‧Opening

22‧‧‧Inner diameter side flow path

23‧‧‧Opening

24‧‧‧Bottom

25‧‧‧Upper surface

26‧‧‧Inner cylinder

27‧‧‧Outer cylinder

28‧‧‧Kibble

32‧‧‧Open

33‧‧‧External rib

34‧‧‧Support frame

35‧‧‧Opening

36‧‧‧Filter material

38‧‧‧Hollow fiber membrane module

82‧‧‧Filter body

86‧‧‧Raw water inlet

87‧‧‧Small diameter O-ring

88‧‧‧Clean water outlet

89‧‧‧Large diameter O-ring

91‧‧‧Protrusion

92‧‧‧Protrusion

93‧‧‧Inner cylinder

102‧‧‧Powder filter material

103‧‧‧Hollow fiber membrane shell

104‧‧‧Connecting cap

105‧‧‧Hollow fiber membrane bundle

106‧‧‧Casting material

125‧‧‧Open

131‧‧‧Big tube

132‧‧‧Small tube

134‧‧‧Second connecting part

135‧‧‧The first connecting part

136‧‧‧O-ring

201‧‧‧Bottom cover

202‧‧‧rectifier board

203‧‧‧Ion Exchanger

204‧‧‧Inner inner wall

205‧‧‧Outer cylinder

206‧‧‧Inner cylinder

207‧‧‧Upper inner cover

208‧‧‧Annular shell

209‧‧‧Inner rib

210‧‧‧Elastic member

211‧‧‧External rib

212‧‧‧Lower end opening

213‧‧‧Check valve

214‧‧‧Check valve

215‧‧‧movable shaft

216‧‧‧Spring

217‧‧‧Protrusion

218‧‧‧inclined part

219‧‧‧Protrusion

220‧‧‧Insert into the recess

222‧‧‧Straight Pipe Department

223‧‧‧Head end

224‧‧‧Original water flow path

225‧‧‧Clean water flow path

226‧‧‧Cylinder with bottom

227‧‧‧Fixed component (self-tapping screw)

228‧‧‧O-ring

229‧‧‧O-ring

230‧‧‧Partial expansion

231‧‧‧Partial expansion

232‧‧‧Enclosed space

233‧‧‧The first cylinder

234‧‧‧Second cylinder

235‧‧‧Partial expansion

236‧‧‧Partial expansion

237‧‧‧rib

238‧‧‧Gap

239‧‧‧Inner wall surface

240‧‧‧Inner rib

241‧‧‧Central axis

242‧‧‧Central axis

243‧‧‧Protrusion

244‧‧‧Protrusion

245‧‧‧rib

246‧‧‧Upper surface

247‧‧‧Open hole

248‧‧‧Inner cylinder plane

249‧‧‧Powder filter module

300‧‧‧Water Purifier Bracket

301‧‧‧Retaining member

302‧‧‧Installation components

304‧‧‧screw

305‧‧‧The first holding part

306‧‧‧Second holding part

312‧‧‧Opening

313‧‧‧The first locking part

314‧‧‧The first central axis

315‧‧‧Reinforcing rib

316‧‧‧Second locking part

317‧‧‧2nd central axis

318‧‧‧Reinforcing rib

319‧‧‧Front end of opening

322‧‧‧The first blocked part

323‧‧‧Second Blocked Part

324‧‧‧Mounting rib

D‧‧‧Distance

d‧‧‧Outer diameter of main body

df‧‧‧Outer diameter

dh‧‧‧Inner diameter

do‧‧‧Outer diameter

dp‧‧‧Opening distance

F‧‧‧Removal force

L‧‧‧Axial length

Lf‧‧‧Full length

M‧‧‧weight

ta‧‧‧radial thickness

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

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

Fig. 7 is a perspective view showing an example of a raw water inlet pipe and a purified water outlet pipe used in the water purifier of the present invention.

Fig. 8 is a perspective view showing an example of the 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 element used in the water purifier of the present invention.

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

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

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

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

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

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

Figure 19 is a cross-sectional view (Figure A) and a perspective view (Figure B) showing an example of the connecting cap used in the water purifier of the present invention.

Fig. 20 is a perspective view showing an example of a form in which the water purifier is installed in the vertical direction using the bracket for the water purifier of the present invention.

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

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

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

Fig. 24 is a front view showing an example of a filter element installed in the water purifier holder of the present invention.

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

An embodiment of the water purifier of the present invention will be described based on the drawings. As shown in Figure 1, the water purifier 1 is composed of the following components: a filter element 2, which houses a filter material; and a filter head 3 for a water purifier, which has a raw water inlet pipe 7 and a purified water outlet pipe 8, and is detachable Filter 2.

Next, each member constituting the filter head 3 for a water purifier will be described. As shown in Figures 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 connection part 5, a filter head fixing plate 4 arranged on the upper surface of the filter head connection part 5, and a configuration On the lower surface of the flange 6.

Next, each member 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 is composed of the following components: a pipe head fitting 11, a tightening member (compression sleeve) 15, and a hose body 16. The pipe head fitting 11 is composed of a cylindrical head 14 and a cylindrical threaded pipe portion 13 extending from the head 14, and a flow penetrating through the head 14 and the threaded pipe portion 13 is formed at the center. road. Furthermore, the hose body 16 is inserted into the threaded nipple portion 13, and is fixed by pressing the fastening member 15 installed on the outer periphery of the hose body 16, and the hose body 16 is fixed between the nipple portion 13 and the fastening member 15 between.

In addition, the fastening member 15 which presses and fixes the hose body 16 should just be the thing which does not leak out when the hose for piping is connected and water passes, or the hose does not fall off due to water pressure. As such a fastening member, there are compression sleeves, hose clamps, tightening bands, etc. for compression and fixation.

The material of the fastening member 15 may be a relatively low-priced resin such as polypropylene, polyacetal, polyethylene, nylon, polycarbonate, etc. However, from the viewpoint of strength, metals such as stainless steel, brass, and bronze are preferable.

In addition, the purified water outlet pipe 8 is composed of a pipe head fitting 11, a fastening member 15 and a hose body 16, similarly to the raw water introduction pipe 7. The pipe head fitting 11 is composed of a cylindrical head 14 and a cylindrical threaded pipe portion 13 extending from the head 14, and a flow penetrating through the head 14 and the threaded pipe portion 13 is formed at the center. road. Furthermore, the hose body 16 is inserted into the screw connection part 13, and the hose body 16 is fixed between the screw connection part 13 and the fastening member 15 by pressing the fastening member 15 installed on the outer periphery of the hose body 16 between. That is, even when high water pressure or external force is applied to the raw water inlet pipe 7 and the purified water outlet pipe 8, it is securely fixed, which is preferable in this respect.

From the standpoint of strength, the tube head fitting 11 is preferably made of metal such as stainless steel, brass, and bronze.

The filter connection part 5 shown in Figures 1, 4, 5 and 6 is a bottomed ‧ double cylindrical shape with a first cylindrical part 233 and a second cylindrical part 234. The space of the first cylindrical part 233 and the raw water The introduction pipe 7 communicates, and the space of the second cylindrical portion 234 communicates with the purified water outlet pipe 8. On the inner peripheral side of the first cylindrical portion 233, a pair of partially enlarged diameter portions 235, 236 are provided as part of the bayonet mechanism described below, and on the outer side of the first cylindrical portion 233, there is provided an effective to improve strength Multiple ribs 237.

The bottomed cylindrical portion 226 on the side of the raw water introduction pipe 7 of the filter connection portion 5 contains a check valve 213 whose flow path is opened by assembling the filter element 2. In addition, the bottomed cylindrical portion 226 on the side of the purified water outlet pipe 8 of the filter connection portion 5 has a built-in check valve 214 to prevent backflow of water.

When removing the filter element 2 from the filter head 3 for the water purifier, the check valve 213 and the check valve 214 of the raw water introduction pipe 7 and the water purification outlet pipe 8 installed in the filter head 3 for the water purifier block the flow path. Therefore, it is possible to prevent the water from flowing backward or leaking out.

The filter head fixing plate 4 shown in Figs. 4 and 8 is provided with openings 17, 18 through which the straight pipe portion 222 of the pipe head fitting 11 passes.

In the raw water introduction pipe 7, the pipe fitting 11 is arranged in the insertion recess 220 of the filter connection part 5, and the straight pipe portion 222 of the pipe fitting 11 passes through the opening 17 of the filter fixing plate 4. The purified water outlet pipe 8 is similarly arranged in the insertion recess 220 of the filter connection portion 5 with the pipe fitting 11, and the straight pipe portion 222 of the pipe fitting 11 passes through the opening 18 of the filter fixing plate 4.

The filter head fixing plate 4 presses the head end surface 223 of the head 14 of the pipe head fitting 11 on one side, and is fixed to the filter head connection part 5 by a plurality of fixing members (tapping screws) 227 on the other side. Thereby, the filter head fixing plate 4 fixes the pipe head fitting 11 to the insertion recess 220 of the filter head connecting portion 5 in the axial direction to prevent the pipe head fitting 11 from falling off and enable the pipe head fitting 11 to rotate.

Furthermore, the fixing member 227 that fixes the filter head fixing plate 4 to the filter head connection part 5 can be a push-type rivet or a snap-type rivet that does not require tools, in addition to self-tapping screws for plastic or wood, etc. Pull lock or snap lock. Alternatively, it may be a method of disposing the fixing member 227 in the form of a claw on either the filter fixing plate 4 or the filter connecting portion 5, forming an opening in the other, and inserting the claw into the opening Department and fixed. The material of the fixing member 227 can be lower-priced resins such as polypropylene, polyacetal, polyethylene, nylon, polycarbonate, etc. However, from the viewpoint of strength, metals such as stainless steel, brass, and bronze are preferred.

Of course, since the straight pipe portion 222 of the tube head fitting 11 is located in the openings 17, 18 of the filter head fixing plate 4 and inside the outer peripheral surface of the head 14 of the tube head fitting 11, the openings 17, 18 are not provided. The head 14 penetrates and the straight pipe part 222 penetrates the size. If the openings 17 and 18 have a circular shape, the relationship becomes the outer diameter of the head 14> the diameter of the openings 17 and 18> the outer diameter of the straight pipe 222.

Furthermore, in the form shown in FIGS. 4 and 8, the pipe head fitting 11 has a straight pipe portion 222 between the threaded pipe portion 13 and the head 14 with an outer diameter larger than that of the screw pipe portion 13 and smaller than the head 14 , But it can also be a form without the straight pipe portion 222. In this case, when the raw water introduction pipe 7 and the purified water outlet pipe 8 are fixed to the filter connection part 5, it is sufficient that the screw connection part 13 passes through the openings 17, 18 of the filter fixing plate 4. Therefore, the opening 17 , 18 is the size that does not allow the head 14 to penetrate but allows the threaded pipe portion 13 to penetrate. If the openings 17 and 18 have a circular shape, it only needs to be the outer diameter of the head 14>the diameter of the openings 17 and 18>the outer diameter of the threaded pipe portion 13.

The opening 17 (18) only needs to have a shape for penetrating the part other than the head 14 of the pipe head fitting 11 and pressing the head end surface 223 of the head 14. Therefore, it can be round, square, elliptical, U Various shapes such as character shapes are formed. Among them, if it is the same circular shape as the head end surface 223, the opening can be minimized to ensure the contact area with the head end surface 223, and therefore it is preferable from the viewpoint of strength.

In addition, in the form shown in FIGS. 4 and 8, two openings 17 and 18 are formed in one filter fixing plate 4, but two openings 17 (18) formed with only one opening 17 (18) can also be used. The filter head fixing plate 4 is used to fix the raw water inlet pipe 7 and the purified water outlet pipe 8 individually.

The filter head fixing plate 4 can be made of acrylonitrile-butadiene-styrene (ABS, Acrylonitrile butadiene Styrene) resin, polycarbonate, polystyrene, polypropylene and other resins, but in terms of strength, it is better to use Made of stainless steel, brass, bronze and other metals.

In order to ensure the pressure resistance, the thickness of the filter head fixing plate 4 is larger and more advantageous. However, if the thickness is increased, the cost will increase. Therefore, considering the balance between pressure resistance and cost, the thickness is preferably 0.5~3.0mm .

When assembling the head 14 of the tube fitting 11 to the filter connection part 5, the O-ring 228 is arranged between the inner circumference of the insertion recess 220 of the filter connection part 5 and the outer circumference of the head 14 , And the pipe head fitting 11 and the filter head connecting portion 5 are combined in a liquid-tight manner to ensure liquid-tightness.

The filter connection part 5 can be made of metals such as stainless steel, brass, bronze, or resins such as ABS resin, polycarbonate, polystyrene, polypropylene, etc. However, ABS resin or polypropylene with good appearance is formed by injection molding Manufacturing has advantages in terms of appearance and manufacturing cost.

With the above structure, the raw water introduction pipe 7 and the purified water outlet pipe 8 can be rotated. Thereby, it is possible to avoid twisting when connecting the water purifier faucet to the raw water introduction pipe 7 and the purified water outlet pipe 8 and prevent water leakage from the connection part with the water purifier faucet.

The filter head fixing plate 4 and the filter head connection part 5 are firmly fixed by the fixing member 227, and therefore, even when a high water pressure is applied to the water purifier 1, water leakage can be prevented. In addition, the fixing member 227 cannot be removed unless a tool or the like is used. Therefore, it is possible to prevent the user from detaching by mistake.

The flange 6 shown in FIG. 5 has a ring shape and is fixed to the filter head connection part 5 by a plurality of fixing members 227. On the inner peripheral side of the ring, there are provided partial enlarged diameter portions 230, 231 as part of the bayonet mechanism described below, so that a pair of convex portions 91, 92 provided on the filter element 2 described below can pass.

The material of the flange 6 can be stainless steel, brass, bronze and other metals, or ABS resin, polycarbonate, polystyrene, polypropylene and other resins. However, ABS resin or polypropylene with good appearance can be molded by injection molding. Manufacturing has advantages in terms of appearance and manufacturing cost.

The filter element 2 shown in FIGS. 2, 12 and 13 is detachably assembled and coupled to the filter head 3 for a water purifier by rotating the bayonet mechanism to form the water purifier 1. In more detail, at least two convex portions 91, 92 are provided on the outer periphery of the filter body 82 of the filter element 2, and by passing through the partially enlarged diameter portions 230, 231 of the flange 6 to engage and rotate, Instead, the bayonet mechanism is used to combine. When the filter element 2 is removed, it is removed by rotating it in a direction opposite to that of the combination.

In this way, the attachment and detachment of the filter element 2 to the filter head 3 for a water purifier is performed by a bayonet mechanism, so the attachment and detachment operation is simple and easy.

In addition, as shown in Figures 5, 9, 10, and 11, a movable shaft is arranged between the inner surface of the filter connecting portion 5 and the flange 6 and the enclosed space 232 between the inner surface of the filter connecting portion 5 and the flange 6. 215, and a spring 216 is provided between the filter head connecting portion 5 and the movable shaft 215. Along with the rotation of the filter element 2 for assembling the filter head 3 for the water purifier, and at the completion stage, the convex portion 217 of the filter body 82 of the filter element 2 contacts the inclined portion 218 of the movable shaft 215, and the movable shaft 215 The movable shaft 215 and the convex portion 217 can be moved upward and pass over the convex portion 217, and the movable shaft 215 and the convex portion 217 are arranged in a snap-fitting manner. By this over (locking), a sense of assembly of the filter element 2 based on the bayonet mechanism is obtained.

With the above-mentioned assembly feeling, the user can surely know that the assembly is completed, and can be surely assembled without error (water-proof). Furthermore, when the convex part 217 is located on the outer periphery of the lower part of the filter head 3 for water purifiers, the user can observe the situation, and therefore, the assembly can be confirmed visually more reliably with the sense of assembly.

When removing the filter element 2 from the filter head 3 for the water purifier, remove it in the reverse order of the installation. After the user moves the protruding portion 219 of the movable shaft 215 in the upward direction, the filter element 2 is rotated in the direction opposite to that of the coupling to complete the removal. With the provision of the spring 216, the filter 2 cannot be removed unless the user consciously performs the removal operation. Therefore, the filter 2 can be prevented from being removed or falling off unexpectedly by the user.

The material of the movable shaft 215 can be stainless steel, brass, bronze and other metals, or ABS resin, polycarbonate, polystyrene, polypropylene and other resins, but polyacetal or polyamide suitable for sliding is used Manufacturing by injection molding has advantages in terms of quality and manufacturing cost.

The filter element 2 shown in Figures 2, 3, 12, and 13 has a raw water inlet 86 and a purified water outlet 88 on the upper end side. The bottom cover 201 forms a storage space. A hollow fiber membrane module 38 containing a hollow fiber membrane bundle 105, an annular housing 208 containing an ion exchanger 203, and a powder filtering material module 249 containing a powder filtering material 102 are contained in the storage space. The powder filter material module 249, the annular housing 208, and the hollow fiber membrane module 38 are sequentially arranged coaxially from the downstream side, and are connected in a liquid-tight manner. Furthermore, the filter element 2 is directly connected to the filter head 3 for the water purifier as shown in FIG. It can be used to purify raw water and spit it out in the form of purified water.

Providing both the raw water inlet 86 and the purified water outlet 88 on the upper end side of the filter body 82 can make the filter element 2 compact, which is preferable. However, if you don't mind the size of the filter element 2, the raw water inlet 86 may be provided on the lower end side of the filter element 2 and the purified water outlet 88 may be provided on the upper end side of the filter element 2.

The hollow fiber membrane module 38 is composed of a hollow fiber membrane housing 103, a hollow fiber membrane bundle 105, and a casting material 106. The hollow fiber membrane bundle 105 is sealed and fixed to the downstream side of the hollow fiber membrane housing 103 with a casting material 106 and is accommodated in the hollow fiber membrane housing 103.

The ion exchanger 203 is housed in a ring-shaped housing 208 in which the ion exchanger 203 is built-in. The rectifying plate 202 that produces the rectifying effect on the ion exchanger 203 is installed on the upper inner cover 207 described below, and is arranged on the upstream side of the ion exchanger 203.

The powder filter material module 249 is composed of a powder filter material 102, an inner tube 206, an outer tube 205, an upper inner cover 207, and a bottom cover 201. The powder filter material 102 is accommodated in a substantially cylindrical accommodating space surrounded by an inner tube 206, an outer tube 205, an upper inner cover 207, and a bottom cover 201. As shown in Figure 12, the raw water entering from the raw water inlet 86 is introduced into the cylindrical shape formed between the inner wall surface 239 of the filter body 82 and the outer peripheral surface of the hollow fiber membrane housing 103 or the outer peripheral surface of the outer cylinder 205 After the gap 238, it passes through the outer cylinder 205, the powder filter material 102, and the inner cylinder 206 in the radial direction, and is filtered by the rectifying plate 202, the ion exchanger 203, and the hollow fiber membrane bundle 105 arranged on the downstream side of the inner cylinder 206. The self-purification water discharge port 88 is discharged as purified water.

The raw water inlet 86 is arranged on the coaxial outer side of the purified water outlet 88 in order to make the filter element 2 the most effective, reasonable and preferable form.

The hollow fiber membrane module 38, the annular casing 208, and the powder filter material module 249 are arranged coaxially in order to make the filter element 2 the most effective, reasonable and preferable form. Furthermore, if the ion exchange function is not required, the annular housing 208 may be omitted, and the hollow fiber membrane module 38 and the powder filter material module 249 may be coaxially arranged and connected in a liquid-tight manner.

Next, each member constituting the filter element 2 will be described. The outer cylinder 205 includes a support frame 34 and a filter material 36 made of synthetic resin. A plurality of lattice-shaped openings 35 are provided on the peripheral surface of the support frame 34 of the outer cylinder 205, and on the peripheral surface of the support frame, the peripheral surface of the support frame is fixed so as to cover the opening of the opening 35. Filter material 36 of synthetic fiber such as ester, polypropylene, polyethylene, nylon, etc.

The filter material 36 has a filter function that prevents the opposed powder filter material 102 from leaking and allows the water to be treated to pass through. Therefore, the mesh of the filter material 36 is smaller than the particle size of the powder filter material 102. In addition, in order to reduce the pressure loss during the passage of water, the larger the aperture ratio of the filter material 36 within the allowable limit of strength, the better. Also, in the same way, the opening ratio of the opening 35 of the support frame 34 is also as large as possible within the allowable limit of strength.

In this way, the outer cylinder 205 is composed of a cylindrical support frame 34 having a plurality of openings 35 on its wall surface, and a filter material 36 fixed to the support frame 34 and covering the openings 35. Therefore, the strength of the outer cylinder 205 is improved. , And can suppress the following situation, that is, due to the deformation of the outer cylinder 205 due to the water pressure generated in the water purification step, the layer thickness of the powder filter material 102 (adsorption material layer) is reduced, so that the raw water passes through the adsorption in the water purification step The distance between the material layer is reduced, and the filtration performance of the water purification filter is reduced due to the insufficient adsorption treatment of the raw water on the adsorption material layer.

Furthermore, in order to be able to effectively use the entire powder filter medium 102 housed in the substantially cylindrical storage space, it is preferable that the area where the opening 35 exists and the area where the opposite powder filter medium 102 exists substantially coincide. As long as the filter material 36 covering the opening of the opening 35 is a non-woven fabric or a woven fabric such as a mesh, it is a thin sheet, and has a filter function that prevents the powder filter material 102 from leaking and allows the water to be treated to pass through. Can.

As a method of fixing the filter material 36 to the support frame 34 of the outer cylinder 205, a method of integrally forming the filter material 36 when the outer cylinder 205 is formed is preferable in that it can be firmly installed.

When the filter material 36 is integrally formed, if the filter material 36 is located on the outer peripheral surface of the support frame 34, the powder filter material 102 filled and housed in the radially inner side of the outer cylinder 205 can have a thickness equivalent to that of the support frame 34 Increase the amount of filling. Furthermore, by providing a structure in which ribs or protrusions are provided on the outer side of the support frame 34 to sandwich the filter material 36, the strength can be increased and the filter material 36 will not peel off from the support frame 34 due to water pressure. Moreover, if it is a rib, it can also contribute to the improvement of the strength of the support frame 34, and it is preferable.

In addition, as a fixing method, it is also possible to use an adhesive to attach or perform thermal fusion, ultrasonic welding, or pressure bonding. If these methods are used, the mesh or unit area weight of the filter material can be changed according to the particle size of the powder filter material 102 used, and multiple types of outer cylinders can be made with one support frame, and the mold shape of the support frame is also changed. It is simple, so it can reduce the cost of the product, which is better. In the case of these fixing methods, the filter material 36 can be easily fixed by being located on the outer peripheral surface of the support frame 34, and the water pressure can be dispersed and maintained by both the filter material 36 and the support frame 34, so it is not easy Problems such as peeling occur, and it is also better in terms of strength.

Among these fixing methods, in order to maintain the fixing strength with the support frame 34, thermal fusion or ultrasonic welding is preferred. Since the amount of energy imparted can be adjusted according to the material of the selected filter material 36 and fixed to the support frame 34 with a strength higher than the fixed strength, ultrasonic welding can be preferably used.

Specifically, it is preferably a fixed form in which the sheet-like polyolefin-based non-woven fabric as the filter material 36 is wound so as to cover the outer peripheral surface of the support frame (of the outer cylinder) to form a cylindrical non-woven fabric Both ends of the axial direction are ultrasonically welded to the outer peripheral surface of the support frame (of the outer cylinder). Furthermore, the axial joints of the non-woven fabric wound into a cylindrical shape are ultrasonically welded to fill the powder filter material 102. . Although this fixed form is a simple form in which the ultrasonic welding part is the minimum area, it has a precise effect of preventing the powder filter material 102 from leaking.

Of course, since the outer cylinder 205 is located in the filter body 82 and radially outside of the inner cylinder 206, there is a relationship of the diameter of the filter body 82>the diameter of the outer cylinder 205>the diameter of the inner cylinder 206. An O-ring 229 is fitted to the annular groove of the opening 212 at the lower end of the outer cylinder 205. Since it is connected to the bottom cover 201 via the outer cylinder 205, the purified water and the raw water (unpurified tap water) will not be mixed.

The inner cylinder 206 is cylindrical, and the mesh is adjusted in such a way that the powder filter material 102 does not pass through but the water passes through. Those with a mesh size of 20-50 μm can be preferably used. A non-woven fabric made of polyolefin-based thermal fusion fibers is used as a raw material, and the non-woven fabric is wound several times on a heated shaft to form a cylindrical shape and cut into a predetermined length. The price of the non-woven fabric is lower and better. However, it is not limited to this. It may also be a cylindrical shape by melting an olefin-based material such as polypropylene and blow molding. It can also be formed by welding or adhering a non-woven fabric or mesh fabric to a cylindrical resin molded body with openings on the outer peripheral surface, or embedding the non-woven fabric or mesh fabric when forming a cylindrical resin molded body with openings . The inner cylinder 206 is preferably a non-woven fabric. Since the inner tube is made of non-woven fabric, the thickness of the inner tube becomes thinner compared with the case where the inner tube is formed by fixing a mesh member on the inner peripheral surface of the inner shell with side openings, even the size of the filter element for the water purifier In the same way, more powder filter material 102 can also be filled.

The thickness of the inner cylinder 206 formed by non-woven fabric is preferably 0.5-2 mm. If the thickness is less than 0.5 mm, it will be caused by the inconvenience of sinking due to the water resistance and the pressure loss of the powder filter material 102 during the passage of water. If the thickness exceeds 2 mm, it protrudes toward the outer diameter side, and the filling amount of the powder filter material 102 is reduced. If the thickness is 0.5-2 mm, there will be no dents, and the filling amount of the powder filter material 102 will not be unduly reduced.

The downstream end (one end) of the inner cylinder 206 is fixed by fitting it to the inner rib 240 of the upper inner cover 207 described below. The powder filter material 102 does not leak and can be fitted to the extent that the following axis alignment work can be achieved.

The end (one end) on the upstream side of the inner cylinder 206 is fixed by being fitted into the inner rib 209 of the bottom cover 201. The powder filter material 102 does not leak and can be fitted to the extent of the following axis alignment work.

As shown in Figure 16 (A) and (B), the upper inner cover 207 is in the shape of a disc with an opening 32 in the center, and an outer rib 33 is erected on the part connected to the outer tube 205, which is connected to the inner tube 206 An inner rib 240 is erected on the part. The outer rib 33 has a thickness of 0.3 to 2.0 mm and a height of 1 to 4 mm, which serves to align the central axis of the outer cylinder 205 and the upper inner cover 207. The inner diameter of the outer rib 33 is approximately the same as the outer diameter of the outer cylinder 205, and also plays a role in preventing the powder filter material 102 from overflowing to the outside and leaking.

An opening 32 is provided on the inner diameter side of the inner rib 240. The inner diameter of the inner rib 240 is approximately the same as the outer diameter of the inner tube 206 and is fixed by fitting the inner tube 206 to the inner rib 240. The powder filter material 102 does not leak and can be fitted to the extent of the following axis alignment work. Thereby, the inner diameter side flow path 22 of the inner tube 206 communicates with the opening 32. That is, the flow path from the powder filter medium 102 to the flow straightening plate 202 is secured.

If the upper inner cover 207 is transparent, it is possible to confirm whether there is no abnormality, etc., the internal condition of the upper inner cover 207 during assembly, which is preferable.

A plurality of protrusions 243 are arranged on the outer peripheral surface of the outer rib 33. Since the center axis of the upper inner cover 207 can be easily aligned with the center axis of the filter body 82, it is preferable in terms of improving the assembling workability.

The material of the upper inner cover 207 can be metals such as stainless steel, brass, bronze, etc., or resins such as ABS resin, polycarbonate, polystyrene, polypropylene, etc., but by injection molding of ABS resin with higher molding accuracy Manufacturing has advantages in terms of quality and manufacturing cost.

As shown in Figs. 17(A) and (B), the bottom cover 201 has a cylindrical shape with a bottom. After the outer cylinder 205 and the inner cylinder 206 are inserted, the filter body 82 is fastened with screws and O-rings. The fixing of the filter body 82 can also be welding. In the case of welding, sealing members such as O-rings are not required, and the manufacturing cost is reduced. It is not particularly limited to ultrasonic welding, spin welding, vibration welding, etc. If it is spin welding, the welding area can be enlarged, and the pressure resistance of the filter element is improved, which is preferable.

A plurality of ribs 245 are provided on the bottom surface of the bottom cover 201 to improve the strength.

The material of the bottom cover 201 can be stainless steel, brass, bronze and other metals, or ABS resin, polycarbonate, polystyrene, polypropylene and other resins, but it can be molded by injection molding of ABS resin or polypropylene with good appearance. However, manufacturing has advantages in terms of appearance and manufacturing cost.

Next, the powder filter medium 102 will be described. As shown in FIG. 13, the powder filter material 102 is accommodated in a substantially cylindrical accommodating space formed by the above-mentioned inner tube 206, outer tube 205, upper inner cover 207, and bottom cover 201. In terms of manufacturing steps, before inserting the upper inner cover 207 into the inner cylinder 206 and the outer cylinder 205, the powder filter material 102 is filled from the upper part of the inner cylinder 206 and the upper part of the outer cylinder 205. After the filling is completed, The upper inner cover 207 is fitted on the outer side wall surface of the upper portion of the inner tube 206 and the outer side wall surface of the upper portion of the outer tube 205 in a manner to seal the powder filter material 102. In addition, during filling, the powder filter material 102 is vibrated or air-intaken or exhausted to increase the filling density of the powder filter material, which is a preferred method for improving the filtering ability of the water purification filter element.

As the powder filter material 102, granular or powdered activated carbon using coconut shell, wood, coal, etc. as raw materials, or granular or powdered ion exchangers suitable for removing heavy metals such as lead in raw water, such as titanium silicon Aluminosilicate such as acid salt or zeolite, or ion exchange resin, etc. are filled and used in an appropriate combination.

In addition, the bottom cover 201 doubles as a cover that closes the powder filter material 102 and one end of the filter body 82. Therefore, the powder filter material 102 can be filled on the surface of the bottom cover 201. Furthermore, there is no need to separately set the inner tube 206 and the outer tube 205 is a member with one end closed, so it is preferred.

For the powder filter material 102, those whose average particle size is about 30~900μm can be used, which are selected according to the type, purpose, and performance of the water purification filter. If the particle size is reduced, the surface area increases. Therefore, the adsorption capacity or ion exchange capacity of the powder filter material can be improved, and the packing density of the powder filter material is also improved. The particle size of the powder filter material is measured using a laser diffraction particle size distribution measuring device (manufactured by Shimadzu Corporation, type SALD-3100), and the cumulative value of the volume particle size distribution is 50% of the particle size (50% particle size) Let it be the average particle size.

In conventional filter materials such as activated carbon for forming bodies, the volume ratio of the binder used for forming accounts for about 30-20%. This part does not contribute to filtration, but by using powdered filter materials, activated carbon can be used Or the volume occupied by the ion exchanger filled with the binder, because the added filter material helps to filter, so the filter capacity can be greatly improved.

In general, if the particle size is reduced, the pressure loss during the flow of water through the powder filter part will increase, and it may not be possible to ensure the predetermined filtration flow rate. However, in the present invention, as described above, corresponding to the shape of the elongated substantially cylindrical inner cylinder 206, the substantially cylindrical accommodating space and the overall shape of the powder filter material 102 accommodated therein (the powder filter part The shape) becomes a cylindrical shape whose axial length becomes longer and longer than its radial length (thickness). In addition, the water flow is carried out in the radial direction from the outer side of the cylindrical powder filter part to the inner side. Therefore, the cross-sectional area of the water flow path is much larger than that of the axial water flow. Therefore, the water flow rate Reduced, even if the powder filter material with a small particle size is filled with high density, the pressure loss during water flow can be sufficiently reduced, so that the established filtration flow rate can be achieved.

The axial length/radial length of the cylindrical powder filter part is a value exceeding 1, and is specified according to the required pressure loss, etc., preferably 2 or more. In addition, the absolute value of the radial length is determined in consideration of preventing the water cut off the boundary surface between the powder filter material and the upper end of the storage space or the lower end of the storage space, and the minimum value required according to the filtering principle of the powder filter material. In practice, it is usually about 5mm or more.

As described above, in the present invention, even if the powder filter material with a small particle size is filled into the powder filter material portion at a high density, the pressure loss during water flow can be sufficiently reduced, and the particle size distribution relative to the average particle size Setting the width below a fixed value can further reduce the pressure loss. If the width of the particle size distribution is wider, the difference in particle size between the powder filter material particles with a smaller particle size and the powder filter material particles with a larger particle size becomes larger. In this way, the powder filter material particles with a smaller particle size enter between the powder filter material particles with a larger particle size, and the density of the powder filter material is increased as a whole, and the powder filter material is blocked, which hinders the flow of raw water, which is inferred to be pressure An important factor in rising losses. By setting the width of the particle size distribution relative to the average particle size to be fixed or less, the powder filter particles with a smaller particle size are removed. Therefore, it is estimated that the effect of reducing the pressure loss is produced. Therefore, the powder filter material is preferably arranged in order of particle size when the cumulative volume reaches 90% particle size D90, the cumulative volume reaches 10% particle size D10, and the cumulative volume reaches 50% particle size D50 satisfying 0.5≦(D90 -D10)/D50≦0.9. More preferably, it is 0.6≦(D90-D10)/D50≦0.8.

If (D90-D10)/D50 is less than 0.5, additional steps such as sieving are required during the manufacture of the powder filter material, or the proportion of the powder filter material that is not used due to the sieving increases, resulting in an increase in cost. In addition, if (D90-D10)/D50 exceeds 0.9, the chance that the powder filter material particles with a smaller particle size will enter between the powder filter material particles with a larger particle size will increase, and the pressure loss during the passage of water will increase.

It is preferable to arrange an elastic member 210 between the powder filter material 102 and the upper inner cover 207 as shown in FIG. 13. In this way, the elastic member 210 pushes the powder filter material 102 and the upper inner cover 207, and is in close contact with the powder filter material 102 and the upper inner cover 207, thereby eliminating the gap between the powder filter material 102 and the upper inner cover 207. The powder filter material 102 is cut when the raw water flows. As the elastic member, rubber such as silicone rubber with relatively low hardness, sponge of synthetic resin, foam, non-woven fabric, felt, etc. can be used.

In the above description, the coaxial arrangement of the substantially cylindrical members with the same central axis is the most effective, reasonable and preferable form in order to make the filter element 2 compact.

Next, the annular housing 208 shown in FIGS. 14(A) and (B) will be described. Since the ion exchanger 203 is arranged on the downstream side of the powder filter medium 102 to be built into the annular casing 208, the raw water can be evenly contacted with the entire ion exchanger 203 after being rectified by the powder filter medium 102. Specific ions (heavy metal ions such as soluble lead, etc.) in the water are removed by ion exchange.

The annular housing 208 is composed of an open bottom surface 24 as an upstream side, an upper surface 25 having an opening 23, an inner tube 26, and an outer tube 27, and has a substantially cylindrical shape. The annular housing 208 is preferably a synthetic resin molded product in order to be able to be manufactured inexpensively, to allow the ion exchanger 203 to be compressed and inserted and assembled smoothly, and to have rigidity that does not cause shape deformation even if it is compressed and inserted. As synthetic resin materials, polypropylene, ABS resin (acrylonitrile butadiene styrene resin), polyacetal, polystyrene, AS resin (acrylonitrile styrene resin), polycarbonate, acrylic resin, poly Ethylene and so on.

In addition, the ratio (L/d) of the axial length (L) of the powder filter medium 102 to the outer diameter (d) of the main body of the filter main body 82 (L/d) is 1.0 to 4.0, but the filter element 2 can be made compact and sufficient The filtering capacity is better. If L/d is less than 1.0, the outer diameter of the main body of the filter element 2 becomes larger and the filter element 2 is not small. In addition, if L/d is greater than 4.0, as the outer diameter (d) of the main body portion of the filter element 2 decreases, the thickness of the powder filter medium 102 in the water flow direction becomes smaller, and a sufficient filtering capacity cannot be obtained.

In order to enable the ion exchanger 203 to be inserted from the open portion of the bottom surface 24 of the annular casing 208, the shape of the open portion is preferably a ring shape that is the same as the shape of the ion exchanger. In order to ensure the water flow area in the ion exchanger 203, the opening 23 of the upper surface 25 of the annular casing 208 preferably has as large an opening area as possible within the allowable range of the strength of the annular casing 208. In order to achieve uniform water flow, the shape of the opening 23 is preferably a plurality of fan-shaped shapes obtained by equally dividing the ring-shaped upper surface 25, but it may also be a plurality of circular or square-shaped openings or an elliptical shape. And other shapes.

The lower outer peripheral surface of the outer tube 27 of the annular casing 208 of this embodiment is substantially the same as the inner peripheral surface of the outer rib 33 of the upper inner cover 207, and the outer rib 33 is fitted into the annular casing 208. fixed. Thereby, the purified water and raw water (unpurified tap water) will not mix.

In addition, the outer peripheral surface of the upper side of the outer tube 27 of the annular housing 208 is substantially the same as the inner peripheral surface of the outer rib 211 of the hollow fiber membrane housing 103 described below, by fitting the outer rib 211 to the annular housing 208 and fixed. Thereby, the purified water and raw water (unpurified tap water) will not mix.

In addition, a flange 28 is provided on the outer peripheral surface of the outer cylinder 27. It is preferable in terms of positioning when the annular housing 208 and the upper inner cover 207, and the annular housing 208 and the hollow fiber membrane housing 103 are assembled.

The material of the ring shell 208 can be stainless steel, brass, bronze and other metals, or ABS resin, polycarbonate, polystyrene, polypropylene and other resins, but by injecting ABS resin with higher dimensional accuracy Forming and manufacturing has advantages in terms of quality and manufacturing cost. The ion exchanger 203 is preferably a long filter medium having ion exchange capability in a ring shape formed by winding and laminating layers. Particularly, when the ion exchanger 203 is formed by cutting a sheet-like long filter medium into a loop with a predetermined axial thickness in a cross section perpendicular to the axial direction, it can be produced inexpensively, and therefore Better. In addition, for example, it may also be a ring formed by connecting relatively short filter materials having ion exchange capability, such as not long strips, but short strips, and winding them in layers. In addition, it may be obtained by compression-molding a fibrous filter medium having ion exchange capability into a predetermined ring shape only.

Furthermore, in order to make the ion exchanger 203 easy to be formed into a loop formed by layered winding and stacking, and to easily maintain its shape, it is preferable that the radial thickness t _a of the ion exchanger 203 is relative to that of the annular shell 208 ratio of ion exchanger within the outer diameter d _o of 203 t _a / d _o who satisfies the relationship of 0.1 to 0.35.

The long filter material with ion exchange capability is preferably obtained by flaking ion exchange fibers, but it may also be made by supporting an adsorbent with ion exchange capability on non-woven fabrics or felts. The ion exchange fiber is a fiber obtained by bonding a predetermined functional group to a polymer matrix of styrene, acrylic, methacrylic, and phenolic. In order to obtain higher performance, it is better to set it as a matrix of acrylic and methacrylic. As the established functional group, there are sulfonic acid, carboxylic acid, trimethylammonium, dimethylethanolammonium, dimethylamine, polyamine, iminodiacetic acid, aminocarboxylic acid, polycarboxylic acid, etc. In order to obtain higher performance, it is better to use sulfonic acid or carboxylic acid. As the adsorbent having ion exchange capability, inorganic adsorbents such as aluminosilicate, calcium phosphate, calcium carbonate, and titanosilicate, or organic adsorbents such as ion exchange resins and chelating resins are preferably used. In order to obtain higher performance, it is better to use titanosilicate or aluminosilicate. The long filter material can also be used by mixing a plurality of filter materials. For example, if ion exchange fibers and fibrous activated carbon are mixed to form a sheet-shaped formed body, a filter with excellent heavy metal removal performance and improved removal performance of trihalomethanes or musty odors can be formed.

The rectifier plate 202 shown in FIG. 15 will be described. After the purified water purified by the powder filter material 102 passes through the inner cylinder 206, it flows in the radial direction while contacting the inner cylinder flat surface 248 of the annular casing 208, passes through the bottom surface 24, and reaches the ion exchanger 203. Here, the rectifying plate 202 exerts a moderate pressure loss on the inflowing purified water through a plurality of openings 247 arranged on the upper surface 246, thereby allowing it to flow more uniformly before reaching the ion exchanger 203, and The filtration capacity of the ion exchanger 203 can be improved.

0.5~

3.0，且相對於上表面246之開口率為15~25%。 The opening hole 247 takes into consideration the balance of the uniform flow of the inflowing purified water and the pressure loss, preferably the hole diameter is

0.5~

3.0, and the aperture ratio relative to the upper surface 246 is 15-25%.

Moreover, the material of the rectifier plate 202 can be stainless steel, brass, bronze and other metals, or ABS resin, polycarbonate, polystyrene, polypropylene and other resins, but by injecting ABS resin with higher dimensional accuracy Forming and manufacturing has advantages in terms of quality and manufacturing cost.

The filter body 82 shown in Figures 2 and 12 is provided with a raw water inlet 86 at the front end, and a small-diameter O-ring 87, a purified water outlet 88, and a large-diameter O-ring are arranged in sequence from the vicinity of the front end on the outer periphery. 89. A pair of convex parts 91, 92 as a bayonet mechanism.

The filter body 82 has an opening on the enlarged diameter side, and the inside is a double cylindrical shape, and a connecting cap 104 described below is inserted into the inner cylinder 93. The inner peripheral side of the inner cylinder 93 communicates with the purified water outlet 88, and the outer peripheral side of the inner cylinder 93 communicates with the raw water inlet 86.

The material of the filter body 82 can be stainless steel, brass, bronze and other metals, or ABS resin, polycarbonate, polystyrene, polypropylene and other resins, but by injecting good-looking ABS resin or polypropylene Forming and manufacturing has advantages in terms of appearance and manufacturing cost.

In the opening 125 in the center of the hollow fiber membrane housing 103 shown in FIGS. 13 and 18, the hollow fiber membranes are bundled and bent into an inverted U shape to form a hollow fiber membrane bundle 105 that is sealed and fixed by a casting material 106. A casting material 106 is filled between the hollow fiber membranes and between the hollow fiber membrane and the hollow fiber membrane housing 103, and the casting material is solidified and fixed. Before connecting the hollow fiber membrane housing 103 to the connecting cap 104 described below, a part of the casting material 106 is cut and removed, and the hollow fiber membrane bundle 105 opens toward the connecting cap 104. It is preferable to perform corrugation processing on a part of the inner peripheral surface of the hollow fiber membrane housing 103. To prevent the casting material 106 from peeling from the hollow fiber membrane housing 103, when water is passed, a load caused by the water pressure is applied to the casting material 106, but the unevenness is formed on the casting material 106 along the concavities and convexities of the wrinkles, so the concavities and convexities are mutually. Because of the jam, the casting material 106 will not peel off or fall off from the hollow fiber membrane housing 103.

As the material of the hollow fiber membrane housing 103, an amorphous resin having good affinity with the adhesive is preferred, and if safety is considered, ABS resin or polystyrene is preferred.

300~ 600μm，內徑為

180~340μm，膜厚為50~150μm，具有充分之強度。不會於製造中之彎折成U字狀之步驟、或壓入至中空纖維膜殼體103之步驟中斷開。 As the hollow fiber membrane bundle 105, a hydrophilized polymer hollow fiber membrane is used. The polymer is excellent in biological properties, heat resistance, chemical resistance, etc., and is suitable for water purifier applications. In addition to polysulfide, polyacrylonitrile, polyphenylene, polyether, polyethylene, and polypropylene hollow fiber membranes can also be used. It is also possible to combine a plurality of hollow fiber membranes with different materials. If the hydrophobic polyethylene or polypropylene hollow fiber membrane is added, the air mixed in the water can be discharged efficiently. The hollow fiber membrane has a pore size of 0.1~0.3μm, which is most suitable for capturing impurities in tap water. The outer diameter of the hollow fiber membrane is

300~600μm, the inner diameter is

180~340μm, the film thickness is 50~150μm, with sufficient strength. It will not be broken during the step of bending into a U-shape during the manufacturing process or the step of pressing into the hollow fiber membrane housing 103.

300~600μm，則具有強度並且足夠細，因此，可於較小之外殼中確保足夠大之膜面積。此亦成為發揮較高之渾濁物過濾能力之因素。 Since the cross-sectional area of only the hollow fiber membranes of the hollow fiber membrane bundle 105 is set to 45-55% of the cross-sectional area of the opening 125 of the hollow fiber membrane shell 103, it has a high turbidity filtering capacity and can be used for a long time. If it is less than 45%, the membrane area of the hollow fiber membrane becomes smaller, and if it exceeds 55%, the impurities will not completely wrap into the dense hollow fiber membrane bundle. In any case, the turbidity filtering ability Both are reduced and cannot be used for a long time. If the outer diameter of the hollow fiber membrane is

300~600μm, it has strength and is thin enough, therefore, a large enough film area can be ensured in a smaller shell. This has also become a factor in exerting a higher filtering capacity of turbidity.

As the casting material (potting material) 106, it is a two-component mixing type in which a fluid main agent and a hardening agent are mixed and hardened, and polyurethane or epoxy resin can be suitably used. The centrifugal method or the static method may be used to solidify these.

On the outer peripheral side of the end portion of the hollow fiber membrane housing 103 that is sealed and fixed by the casting material 106, there is provided a flange portion that engages with the connecting cap 104 described below.

The connecting cap 104 shown in FIGS. 13, 19(A), (B) has a large tube 131 and a small tube 132, and a first connecting portion 135 connected to the hollow fiber membrane housing 103 is provided on the inner peripheral side of one end of the large tube 131, In addition, there is a second connecting portion 134 connected to the inner cylinder 93 of the filter body 82 on the outer peripheral side of one end of the small cylinder 132. The inner circumference of the first connecting portion 135 is engaged with the outer circumference of the flange portion provided on the hollow fiber membrane housing 103 described above in a manner that does not cause shaking. In the engaged state, the welding head of the ultrasonic welding machine is placed from the side of the connecting cap 104, and vibration energy is applied while applying pressure, thereby welding the connecting cap 104 and the hollow fiber membrane shell 103. The welding method may be any method such as a butt joint method, a step joint method, a share joint method, and a bead joint method, and is not particularly limited. The connecting cap 104 and the hollow fiber membrane housing 103 can also be connected by fitting, rather than by ultrasonic welding. An elastic member such as an O-ring may also be interposed between the connecting cap 104 and the hollow fiber membrane housing 103.

An O-ring 136 is fitted to the annular groove of the second connecting portion 134 of the small cylinder 132. Since the connecting cap 104 is connected to the filter body 82 via the O-ring 136, the purified water and the raw water (unpurified tap water) will not be mixed.

As the material of the connecting cap 104, when it is connected to the hollow fiber membrane housing 103 by ultrasonic welding, the same material as the hollow fiber membrane housing 103 is used. ABS resin, AS resin, polyacetal, polycarbonate, polystyrene with high dimensional accuracy during molding can be used. When connecting with the hollow fiber membrane shell 103 by fitting, relatively soft polyethylene or polypropylene is used. If it is polyethylene or polypropylene, the forced demolding of the undercut part of the mold is easier, and the mold production cost is low. Since it is relatively soft, it is easier to insert during manufacturing, and the productivity is improved.

In addition, protrusions 244 are arranged on the outer peripheral surface of the large tube 131. Since the central axis of the connecting cap 104 can be easily aligned with the central axis of the filter body 82, it is preferable in terms of improving the assembling workability.

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

The raw water inlet pipe 7 and the purified water outlet pipe 8 of the filter head 3 for the water purifier are connected to the water purifier water plug (not shown) of the cabinet. When the handle of the water faucet of the water purifier is turned to open the faucet, tap water is supplied to the raw water introduction pipe 7 from a valve mechanism built in the water faucet of the water purifier. The purified water purified by the water purifier 1 is returned from the water purifier outlet pipe 8 to the water purifier faucet, and is directly discharged from the outlet of the water purifier faucet without passing through a valve mechanism. That is, the water purifier 1 is provided on the downstream side of the valve mechanism built in the water faucet of the water purifier, and no water pressure is applied to the water purifier 1 when the water is stopped. It is the so-called Type II water purifier. However, the water purifier 1 of the present invention is not limited to type II. It can also be used as a so-called I-type water purifier that applies water pressure to the water purifier 1 when the water is stopped.

Next, the purification of the tap water in the water purifier 1 will be described. The water purifier of the present invention is shown by the arrows in Figs. 3 and 12. When the water faucet (not shown) is opened, the raw water flows into the raw water introduction pipe 7 of the filter head 3 for the water purifier and flows to the filter core. 2 The raw water inlet 86 of the filter body 82 is introduced. Here, when the filter element 2 is not attached to the filter head 3 for a water purifier, the check valve 213 and the check valve 214 close the flow path. Therefore, it is possible to prevent the tap water from coming out due to the incomplete assembly of the filter element 2 problem.

If the handle of the water purifier water faucet (not shown) is turned to open the water purifier, the tap water flows into the raw water inlet of the filter element 2 through the raw water flow path 224 of the filter connection part 5 of the water purifier filter head 3 86. It flows uniformly from the outer diameter side to the inner diameter side of the cylindrical powder filter material 102 to decompose the free residual chlorine in the tap water and at the same time adsorb and remove the volatile organic compounds in the tap water. Then, the water reaches the inner tube 206 inside the cylindrical powder filter material 102, the water flows upward, passes through the rectifying plate 202, and reaches the ion exchanger 203. Water flows from the lower side of the ion exchanger 203 to the upper side, and the lead component is removed. Then, the water flows from the outer diameter side to the inner diameter side of the hollow fiber membrane bundle 105, and the impurities or bacteria in the water are trapped in the hollow fiber membrane. The water purification system that has passed through the hollow fiber membrane bundle 105 is discharged from the water purification outlet 88 of the filter element 2 and directly discharged from the water purifier faucet outlet through the water purification flow path 225 of the filter connection part 5. Users can get delicious and safe clean water.

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

Then, install the unused filter element 2 to the filter head 3 for a water purifier. If the front end of the unused filter element 2 is inserted into the filter head 3 for a water purifier, the center axis 242 of the filter element 2 will naturally coincide with the center axis 241 of the filter head 3 for a water purifier. If the unused filter element 2 is rotated 90 degrees in the clockwise direction after obtaining the touch that reaches the filter head 3 for the water purifier, the unused filter element 2 can be reliably attached to the filter head 3 for the water purifier.

<Example>

The particle size shown in the examples is measured by using a laser diffraction particle size distribution measuring device (manufactured by Shimadzu Corporation, model [SALD-3100]) to add a small amount of sample to pure water and stir a part of it. Stirring is always carried out in the sample tank of the device, and the particle size distribution is measured after ultrasonic treatment is performed for 1 minute while circulating from the sample tank to the cell.

(Example 1)

Use coconut shell activated carbon as the powder filter material. The particle size D50 when the cumulative value of the volume particle size distribution reaches 50% is 197μm, the particle size D90 when the cumulative value of the volume particle size distribution reaches 90% is 295μm, and the particle size D10 when the cumulative value of the volume particle size distribution reaches 10% is 141μm . The activated carbon is filled into the filter element of the structure shown in Fig. 3, and measured to show the pressure loss value (1) when the flow rate is 3.5L/min. After that, measure the pressure loss value (2) of the filter element after the powder filter material is removed, and subtract the pressure loss value (2) from the pressure loss value (1) to calculate the pressure loss value of the powder filter material (3) ). The pressure loss in the powder filter part becomes a very small result.

(Example 2)

As the powder filter material, the following coconut shell activated carbon is used, that is, the particle size D50 where the cumulative value of the volume particle size distribution reaches 50% is 211μm, and the particle size D90 where the cumulative value of the volume particle size distribution reaches 90% is 319μm. The particle size D10 at which the cumulative value of the particle size distribution reached 10% was 143 μm, except for this, the pressure loss was measured in the same manner as in Example 1. The pressure loss is higher than that of Example 1, but it is not a problem in practice.

(Reference example 1)

As the powder filter material, the following coconut shell activated carbon is used, that is, the particle size D50 where the cumulative value of the volume particle size distribution reaches 50% is 199 μm, and the particle size D90 where the cumulative value of the volume particle size distribution reaches 90% is 319 μm. The particle size D10 at which the cumulative value of the particle size distribution reached 10% was 116 μm. Except for this, the pressure loss was measured in the same manner as in Example 1. The pressure loss exceeds 0.018MPa.

The conditions of the powder filter materials of Examples 1, 2, and Reference Example 1 are summarized in Table 1, and the pressure loss values are summarized in Table 2. If the pressure loss value (3) of the powder filter material portion at 3.5L/min when water is passed through is below 0.018MPa, it is not a problem in practice.

Next, one embodiment of the stand for a water purifier of the present invention will be described based on the drawings. As shown in Figure 20, in the inner wall (not shown) of the space under the sink of the cabinet, for example, the filter element 2 of the water purifier 1 is held on the holding member 301 in a direction perpendicular to the central axis of the cylinder. It is installed and installed in the holder 300 for a water purifier. The holder 300 for a water purifier is composed of two holding members 301 with an opening 312 and a mounting member 302 fixed to the wall surface, and the columnar shape is held by the upper and lower holding members 301 (the first holding part 305 and the second holding part 306) The filter heart 2 outside.

FIG. 21 is a perspective view showing the stand 300 for the water purifier when the water purifier 1 is installed vertically as shown in FIG. 20. The holding member 301 is preferably substantially C-shaped, and the inner diameter dh of the holding member 301 relative to the outer diameter df of the filter element 2 shown in FIG. 24 is 0.9 df or more and 1 df or less. If the inner diameter dh is 0.9 df or more, the filter 2 can be removed with a moderate force when the filter element 2 is removed. If the inner diameter dh is less than 1df, the filter 2 can be prevented from falling off.

In addition, the distance between the two front ends of the opening 312 of the holding member 301 is a dimension smaller than the diameter of the cylindrical filter element 2. After the filter 2 is inserted, it has a positive sense of assembly. It is preferable that the opening distance dp of the opening front end 319 with respect to the outer diameter df of the filter element 2 shown in FIG. 24 is 0.7 df or more and 0.9 df or less. If the opening distance dp is 0.7 or more, when the filter element 2 is removed, it can be removed with a moderate force. If the opening distance dp is 0.9df or less, the filter 2 can be prevented from falling off. In addition, a reinforcing rib 318 is provided at the front end 319 of the opening to prevent deformation or bending of the front end 319 of the opening when the filter element 2 is in contact with the front end 319 of the opening to apply force. In addition, the reinforcing rib 318 also serves as a reinforcing rib for improving the strength for the substantially C-shaped holding member 301 to firmly hold the filter element 2 to improve the effect.

In this embodiment, the retaining member 301 and the mounting member 302 have two locking portions respectively. First, the retaining member 301 is provided with a first locking portion 313 that is locked with the mounting member, and the first locking portion 313 It is located at a position on the first central axis 314 that is the same as the opening direction of the opening 312, and has a convex shape toward the mounting member 302, and its front end has a pair of substantially L-shaped shapes. In addition, the attachment member 302 is provided with a first locked portion 322 in the shape of a notch into which the first locking portion 313 is fitted. Furthermore, the holding member 301 is provided with a second locking portion 316. The second locking portion 316 has the same shape as the first locking portion 313 and is arranged on a second central axis different from the opening direction of the opening 312 317 on. Also, in the same way, the mounting member 302 is provided with a second locked portion 323 in the shape of a notch groove into which the second locking portion 316 is fitted.

The first holding portion 305 located on the upper side is a pair of substantially L-shaped first locking portion 313 and second locking portion 316 respectively above the mounting member 302 to be fitted into the notch groove shape of the mounting member 302 The first locked portion 322 and the second locked portion 323 are engaged with the mounting member 302. Similarly, the second holding portion 306 located on the lower side has two locking portions formed in a pair of substantially L-shapes that are fitted under the mounting member 302 to the two groove-shaped grooves located in the mounting member 302. The stop portion is engaged with the mounting member 302. The mounting member 302 is fastened and fixed to the wall surface with two screws 304. In this way, the holding member 301 and the mounting member 302 are engaged with two locking parts, whereby the two parts are stably fixed without shaking, and the filter element 2 can be firmly held in normal times. The core 2 can be easily attached and detached when it is replaced. Furthermore, the fixing of the holding member 301 and the mounting member 302 can also be screw fastening or claw fitting, no matter what means.

The cylindrical filter element 2 is inserted from the openings 312 of the two holding members 301, and their shapes are exactly the same as each other, and can be firmly held without slack by the elastic force of the holding members. In addition, the distance D between the outer ends of the first holding portion 305 and the second holding portion 306 shown in Fig. 22 is preferably 0.35Lf or more and 0.9Lf or less with respect to the overall length Lf of the filter element 2 shown in Fig. 24. If the distance D is 0.35Lf or more, even a long-length filter element can be held stably. If the distance D is less than 0.9Lf, it can prevent the filter element from moving in its length direction. Filter 2 falls off. Furthermore, if the width of the part holding the filter element of the holding member 301 is sufficiently wide, it can also be in the following form, that is, only one holding member 301 is engaged with the mounting member 302, and only one holding member 301 is used. Hold the filter 2.

In the embodiment of Figures 20 and 21, the insertion direction of the filter element 2 with respect to the opening of the holding member 301 is perpendicular to the wall surface, so even if it is installed on the side wall of the limited space at the bottom of the cabinet sink, the hand Insert the filter element 2 straightly and easily.

The material of the holding member 301 or the mounting member 302 can be resins such as ABS resin, polycarbonate, polystyrene, polypropylene, or metals such as stainless steel, brass, and bronze. Among them, it is manufactured by injection molding of ABS resin or polypropylene with good appearance, which has advantages in appearance and manufacturing cost, and has the advantage that the attachment and detachment of the filter 2 becomes easy.

Fig. 22 is a perspective view of an example of the upper right corner (not shown) of the storage space provided under the sink of the cabinet. By reversing the left and right sides of the water purifier bracket 300, it can also be installed in the upper left corner of the storage space under the cabinet sink (not shown). Compared with the vertical arrangement of the filter 2 in Fig. 20, the filter 2 is arranged horizontally. The angle (acute angle) formed by the insertion direction of the filter element 2 with respect to the opening 312 of the holding member 301 and the direction perpendicular to the wall surface (acute angle) is preferably 10 degrees or more and 90 degrees or less. If the angle is 10 degrees or more, even 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 sink of the cabinet is narrow, it cannot be moved in the horizontal direction. When loading and unloading the filter element 2, the filter element 2 can also be replaced by avoiding the oblique direction of the sink of the cabinet. In addition, the insertion direction of the filter element 2 is the direction along the wall surface where the angle becomes the maximum, so the angle naturally becomes 90 degrees or less. In addition, since the weight of the filter element 2 acts in the downward direction, it can be removed with less force than when it is installed vertically. Furthermore, the removal force F of the filter element 2 is preferably 0.5M kg or more and 2.0M kg or less with respect to the weight M kg of the filter element when it is full of water. If the removal force F is 0.5M kg or more, the filter 2 can be prevented from falling off. If the removal force F is 2.0M kg or less, the filter element 2 can be removed with a moderate force when removing it.

In the form of FIG. 22, the holding member 301 is mounted on the mounting member 302 in such a manner that the insertion direction of the filter element 2 with respect to the opening 312 is 45 degrees downward with respect to the direction perpendicular to the wall surface.

FIG. 23 is a side view of a state where the holding member 301 is installed in a manner that the insertion direction of the filter element 2 with respect to the opening 312 is 45 degrees downward with respect to the direction perpendicular to the wall surface. Hereinafter, the direction in which the central axis of the cylinder of the filter element 2 in the state where the holding member 301 holds the filter element 2 is set as the central axis direction, and the holding member 301 in the embodiment of FIGS. 20 and 21 is opposed to The direction in which the mounting member 302 is engaged is described as the first direction. The holding member 301 is engaged with the mounting member 302 in the second direction after the central axis direction is reversed from the first direction, and is mounted. The first locking portion 313 of the holding member 301 is engaged with the second locked portion 323 of the mounting member 302 obliquely upward, and the second locking portion 316 is oriented horizontally and is engaged so as to be installed vertically with respect to the wall surface. The first locked portion 322 of the mounting member 302. Since the first locking portion 313 is disposed on the first central axis 314 that is the same as the opening direction of the opening portion 312, the opening direction of the opening portion 312 of the holding member 301 can be inclined downward according to the method of engagement. In this way, only by reversing the engagement direction of the holding member 301 with respect to the mounting member 302, the angle difference between the first central axis 314 and the second central axis 317 can be changed by the opening 312 of the holding member 301. The angle of the opening direction relative to the wall. That is, the holder 300 for a water purifier can change the opening direction angle of the opening part 312 of the holding member 301 with respect to the wall into two types according to the attachment position, As a result, the filter element 2 can be replaced easily.

Furthermore, of course, the first locking portion 313 and the second locking portion 316 of the holding member 301, and the first locked portion 322 and the second locked portion 323 of the mounting member 302 have the following shapes, namely, When the holding member 301 is engaged with the mounting member 302 in the first direction, the first locking portion 313 and the first locked portion 322 can be engaged, and the second locking portion 316 and the second locked portion 323 can be engaged It can be engaged. When the holding member 301 is engaged with the mounting member 302 in the second direction, the first locking portion 313 and the second locked portion 323 can be engaged, and the second locking portion 316 and the first The locked portion 322 can be engaged. Alternatively, the first locking portion 313 and the second locking portion 316 may have a notch groove shape, and the first locked portion 322 and the second locked portion 323 may have a convex shape.

In addition, if the holding member 301 and the mounting member 302 are engaged with two locking parts, the two parts are stably fixed, but in order to further increase the stability, the first locking part and the second locking part can also be used. An additional locking portion is provided in between, and an additional locked portion is provided between the first locked portion and the second locked portion, and it 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 installed from the outer side of the installation member 302 in the longitudinal direction. At this time, the reinforcing rib 315 of the holding member 301 crosses the mounting rib 324 of the mounting member 302. Thereby, after the holding member 301 reaches the mounting member 302, after the tactile feeling is obtained, it can be reliably installed, so that the holding member 301 will not easily fall off from the mounting member 302.

In addition, in order to perform the replacement operation of the filter element in the space under the water tank with better operability, the insertion direction of the filter element 2 with respect to the opening 312 of the holding member 301 in the first direction engaged in the first direction The angle (acute angle) formed by the inserting direction of the filter element 2 with respect to the opening 312 of the holding member 301 in the state of being engaged in two directions is preferably 10 degrees or more and 90 degrees or less. If the angle is 10 degrees or more, the insertion direction of the filter element 2 can be changed sufficiently. Therefore, for example, even when the filter element 2 is engaged in the first direction, the filter cannot be removed due to obstacles in the storage space at the bottom of the cabinet sink. In the case of inserting the core, the filter core 2 can also be inserted by engaging in the second direction to avoid obstacles. In addition, since the insertion direction of the filter element 2 is perpendicular to the wall surface under the cabinet sink in most cases, for example, when the insertion direction of the filter element 2 is perpendicular to the wall surface in the engaged state in the first direction, Naturally, the insertion direction of the filter element 2 in the state of being engaged in the second direction is the direction along the wall surface where the angle becomes the maximum. Therefore, the angle is preferably 90 degrees or less. In most cases, the storage items are placed in the direction below the storage portion at the bottom of the cabinet sink, so the angle is more preferably 60 degrees or less.

In addition, the holding member 301 has a plurality of reinforcing ribs 315 protruding in the radial direction. The reinforcing rib 315 located on the outer side of the convex shape at the two positions and abutting on the mounting member 302 is a reinforcing rib for increasing the strength of the root of the holding member because the holding member 301 having a substantially C-shape firmly holds the filter element 2 And improve the effect.

Furthermore, if two opening holes are provided in the mounting member 302, and the tightening band, the face fastener, or the tightening rope are passed through the opening holes and wound to the filter element for binding, it can be held more securely. Fixed filter 2.

The means for fixing the mounting member of the water purifier bracket 300 to the wall of the space under the sink can be screw fastening or strong double-sided tape, no matter what means.

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

Then, install the unused filter element 2 to the filter head 3 for a water purifier. If the front end of the unused filter element 2 is inserted into the water purifier filter head 3, the center axis of the filter element 2 will naturally coincide with the center axis of the water purifier filter head 3. If the unused filter element 2 is rotated 90 degrees clockwise after obtaining the touch that reaches the filter head 3 for the water purifier, the unused filter element 2 can be reliably installed on the filter head 3 for the water purifier. .

This application is based on the Japanese patent application filed on November 30, 2016, Japanese patent application 2016-232255, Japanese patent application filed on February 15, 2017, Japanese patent application 2017-025880, and June 2017 The contents of the Japanese patent application and Japanese Patent Application No. 2017-121224 filed on the 21st are incorporated herein by reference.

(Industrial availability)

The present invention relates to a water purifier for purifying tap water. More specifically, it relates to an under-tank water purifier installed in the space beside or below the sink, but it can be applied to wall-mounted water purifiers and vertical water purifiers. All water purifiers such as water purifiers. It is not limited to the under-tank water purifier.

In addition, the present invention relates to a stand for installing a water purifier for purifying tap water in a space under the sink of a cabinet. More specifically, it relates to a stand for an under-tank water purifier, but it can be applied to a wall-mounted water purifier. All water purifiers such as water purifiers and vertical water purifiers. It is not limited to the under-tank water purifier.

2‧‧‧Filter

3‧‧‧Filter head for water purifier

7‧‧‧Raw water inlet pipe

8‧‧‧Water outlet pipe

82‧‧‧Filter body

102‧‧‧Powder filter material

105‧‧‧Hollow fiber membrane bundle

202‧‧‧rectifier board

203‧‧‧Ion Exchanger

224‧‧‧Original water flow path

225‧‧‧Clean water flow path

238‧‧‧Gap

241‧‧‧Central axis

242‧‧‧Central axis

d‧‧‧Outer diameter of main body

L‧‧‧Axial length

Claims (3)

A filter element for a water purifier, comprising: a cylindrical filter body provided with a raw water inlet and a purified water outlet; and a cylindrical powder filter material module and a cylindrical hollow fiber membrane module, etc. It is coaxially housed in the filter body, and the powder filter material module houses a powder filter material, and the hollow fiber membrane module houses a hollow fiber membrane; the filter element for a water purifier has the following structure, that is, from The water that enters the raw water inlet passes through the inside of the powder filter material module, the inside of the hollow fiber membrane module, and flows out from the water purification outlet. The powder filter material module is equipped with an outer cylinder, which is not supplied. The above-mentioned powder filter material passes through but the water supply passes through; the inner tube is arranged inside the above-mentioned outer tube, and does not allow the above-mentioned powder filter material to pass through but the water supply passes through; One end is liquid-tightly connected to close the space between one end of the outer cylinder and one end of the inner cylinder, and an opening communicating with the space on the inner diameter side of the inner cylinder is formed; the bottom cover is connected to the outer cylinder The other end and the other end of the inner cylinder are connected in a liquid-tight manner, and the space between one end of the outer cylinder and one end of the inner cylinder and the space on the inner diameter side of the inner cylinder are sealed; and the powder filter material, which accommodates In the space surrounded by the outer cylinder, the inner cylinder, the upper inner cover, and the bottom cover; the hollow fiber membrane module has one end connected to the water purification outlet in a liquid-tight manner, and the other end is connected to the powder filter material The upper inner cover of the module is connected directly or liquid-tightly via other components. The powder filter material is arranged in order of particle size, when the cumulative number reaches 90% of the particle size D90, and the cumulative number reaches 10% of the particle size. D10, and the particle size D50 of which the cumulative number reaches 50% satisfies 0.5≦(D90-D10)/D50≦0.9. The filter element for a water purifier of claim 1, wherein the raw water inlet and the purified water outlet are provided at one end of the filter body, and the gap between the filter body and the outer cylinder of the powder filter module The gap between the filter body and the upper inner cover of the powder filter material module and the gap between the filter body and the hollow fiber membrane module are connected to form a water passage communicating with the raw water inlet. For example, the filter element for a water purifier of claim 1 or 2, wherein the bottom cover of the powder filter material module doubles as the end of the filter body provided with the raw water inlet and the purified water outlet on the opposite side A closed cap at the other end.

Images