JPH0657489U - Cartridge for water purification - Google Patents

Abstract

(57) [Summary] [Purpose] The water flow is distributed almost evenly in the activated carbon fiber layer and the hollow fibers in the cartridge so that the filtration can be carried out efficiently without causing clogging. It is intended to provide a water purification cartridge. [Configuration] Inlet 4 formed on the outer peripheral surface of the case 32 in which the hollow fiber 41 is housed in a U-shaped bent state
The aperture ratio of 0 gradually increases from one end where the opening is formed to the opposite end.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water purification cartridge, and more particularly to a water purification cartridge using two types of filtration materials.

[0002]

[Prior art]

 Tap water used for drinking contains about 1 ppm of chlorine for sterilization. This contained chlorine gives a person who drinks tap water a discomfort due to a chlorine odor. In addition, during the dry season, water odor that cannot be removed by normal water treatment at the water treatment plant remains in tap water, causing more discomfort than chlorine.

[0003] In order to remove such chlorine odors and blue-green odors, for example, a filter for water purification using an activated carbon fiber layer and hollow fibers as disclosed in Japanese Utility Model Publication No. 3-51032 is used. Water purifiers have been supplied and are becoming widespread.

[0004]

[Problems to be solved by the device]

 The water purification cartridge of a water purifier used in ordinary households is, for example, a combination of activated carbon and hollow fibers. The activated carbon removes chlorine odors and blue-green odors, and the hollow fibers remove suspended solids. I am trying.

Such a domestic water purifier must have its cartridge compact so that it can be directly attached to a tap. Therefore, the hollow fiber is arranged on the center side and activated carbon is arranged on the outer circumference side.

However, even if such activated carbon and hollow fibers are simply installed in a cylindrical case and the raw water is introduced into the case through an opening at one end of the case, the raw water will not be discharged due to the imbalance of water pressure inside. Water does not evenly pass between the activated carbon and the hollow fibers, but the water locally flows unevenly. In other words, there is a problem that water is concentrated in the inlet part of the case and activated carbon and hollow fibers are not effectively used in the inner part of the case.

When flanges are formed at both ends of the case in the axial direction and an activated carbon fiber layer is formed on the outer peripheral surface of the case between the flanges at both ends, the flange and the activated carbon fiber layer are separated from each other. Water may pass between the end faces, which may cause insufficient filtration by the activated carbon fiber layer.

Further, when the activated carbon fiber layer is wound by directly adhering to the outer peripheral surface of the case, raw water passes through the portion corresponding to the inflow port of the activated carbon fiber layer, but the inflow port is not provided. Raw water will not pass through the activated carbon fiber layer wound around the outer periphery of the. That is, the water is locally unevenly distributed only in the portion corresponding to the inlet of the activated carbon fiber layer, which hinders effective utilization of the entire surface of the activated carbon fiber layer.

The present invention has been made in view of the above problems, and the raw water flows evenly inside the cartridge, and the raw water always passes through the activated carbon fiber layer. An object of the present invention is to provide a water purification cartridge in which the fiber layer can be effectively used in the entire area.

[0010]

[Means for Solving the Problems]

 According to a first aspect of the invention, a first filter material is arranged in a case having an opening at one end, and a plurality of inflow ports are formed on an outer peripheral surface of the case, and the inflow ports are formed. A second filter material is arranged on the outer peripheral surface of the case, and the case is housed in an outer cylinder whose one end is open and the other end is closed. A gap between the inner surface of the outer cylinder and the inner peripheral surface serves as a raw water passage, and the raw water introduced from the opening at one end of the outer cylinder permeates the second filter material on the outer peripheral surface of the case, The aperture ratio of the inflow port formed on the outer peripheral surface of the case passes through the first filter material in the case and is discharged from the opening at one end of the case in the axial direction of the case. From the end of the case where the opening is formed to the opposite end, It was made larger Te are those relating to water purification cartridge according to claim.

According to a second aspect of the invention, hollow fibers are arranged in a U-shaped bent state in a case having an opening at one end, and the open ends of both ends of the hollow fiber face the opening of the case. The case is fixed by an encapsulating material, one end of the case is closed by the encapsulating material, and the case is housed in an outer cylinder whose one end is open and the other end is closed. The gap between the outer cylinder and the inner peripheral surface is a raw water passage, and the activated carbon fiber layer is provided on the outer peripheral surface of the case. Through the activated carbon fiber layer and the raw water introduced into the case through the inflow port is introduced into the case through the activated carbon fiber layer and flows through the wall surface of the hollow fiber. To penetrate into the hollow fibers The hollow fibers are discharged through the open ends at both ends, and the opening ratio of the inlet formed on the outer peripheral surface of the case is in the axial direction of the case, and the opening at one end of the case is formed. The present invention relates to a water purification cartridge characterized in that it becomes larger as it goes from the end to the opposite end.

According to a third aspect of the invention, hollow fibers are arranged in a U-shaped bent state in a case having an opening at one end, and the open ends of both ends of the hollow fiber face the opening of the case. The case is fixed by an encapsulating material, one end of the case is closed by the encapsulating material, and the case is housed in an outer cylinder whose one end is open and the other end is closed. The gap between the outer cylinder and the inner peripheral surface is a raw water passage, and the activated carbon fiber layer is provided on the outer peripheral surface of the case. Through the activated carbon fiber layer and the raw water introduced into the case through the inflow port is introduced into the case through the activated carbon fiber layer and flows through the wall surface of the hollow fiber. To penetrate into the hollow fibers The hollow fibers are discharged through the open ends at both ends, and the opening ratio of the inlet formed on the outer peripheral surface of the case is in the axial direction of the case, and the opening at one end of the case is formed. The thickness of the activated carbon fiber layer is increased from the end portion to the opposite end portion, and the activated carbon fiber layer provided on the outer peripheral surface of the case corresponds to at least the thickness of the activated carbon fiber layer from both ends in the axial direction. The outer peripheral surface of the case is adhered to the outer peripheral surface of the case by a distance corresponding to the above distance, and a member for separating the activated carbon fiber layer from the outer peripheral surface of the case is provided on the outer peripheral surface of the case except the contact portion. The present invention relates to a water purification cartridge characterized in that

[0013]

[Action]

 According to the first invention, the raw water passes through the gap between the case and the inner peripheral surface of the outer cylinder, permeates the first filter material on the outer peripheral surface of the case, and is formed on the outer peripheral surface of the case. It enters the case through the inflow port, penetrates the first filter material in the case, and is discharged from the opening of the case. Then, the inflow rate of raw water is controlled by the change in the opening ratio of the inlet, and the raw water is introduced through the inlet with a large opening ratio in the deep part where it is difficult to introduce the raw water. It becomes possible to flow smoothly.

According to the second aspect, the raw water is formed on the outer peripheral surface of the case by passing through the activated carbon fiber layer on the outer peripheral surface of the case through the gap between the case and the inner peripheral surface of the outer cylinder. It enters the case through the inflow port, passes through the wall surface of the hollow fiber in the case, and is discharged through the openings at both ends of the hollow fiber through the opening at one end sealed by the resin of the case. Then, the inflow rate of raw water is controlled by the change in the opening ratio of the inlet of the case, and the raw water is introduced through the inlet with a large opening ratio in the deep part where it is difficult to introduce the raw water. It enables almost uniform flow along the axial direction of the case.

According to the third invention, the raw water passes through the activated carbon fiber layer on the outer peripheral surface of the case through the gap between the case and the inner peripheral surface of the outer cylinder, and is formed on the outer peripheral surface of the case. It enters the case through the inflow port, passes through the wall surface of the hollow fiber in the case, and is discharged through the openings at both ends of the hollow fiber through the opening at one end sealed by the resin of the case.

Then, the inflow rate of the raw water is controlled by the change of the opening ratio of the inflow port, and the raw water is introduced through the introduction port of the large opening ratio in the deep part where the raw water is difficult to be introduced. It enables a substantially uniform flow of. Even if raw water passes through both ends of the activated carbon fiber layer wrapped around the outer peripheral surface of the case, the raw water is adhered to the outer peripheral surface of the case at least by a distance corresponding to the thickness of the activated carbon fiber layer. It will pass through the activated carbon fiber layer. Since the activated carbon fiber layer is wound around the outer peripheral surface of the case with a gap provided, the activated carbon fiber layer is not only located in the region corresponding to the inlet port but also between the inlet ports. In this area, raw water will effectively pass through.

[0017]

【Example】

 1 to 4 show a water purifier using a water purification cartridge according to an embodiment of the present invention. The water purifier includes a frame 10 having a valve chamber. An adapter ring 12 having a connection port 11 is provided at the connection portion of the frame 10 that is connected to the tap for water. The adapter ring 12 is adapted to be tightened by a holding nut 13 as shown in FIG.

A packing 14 is arranged inside the presser nut 13, and the packing 14 is crimped to the tip of the tap of the water supply. A rotary valve 15 is arranged inside the packing 14. The rotary valve 15 includes a support shaft 16 as shown in FIG. 1, and a switching knob 17 is attached to the tip of the support shaft 16.

A discharge port 20 is provided on the outer peripheral side of the rotary valve 15, and a lower passage 21 is formed vertically below the rotary valve 15. The raw water discharge port 22 is provided at the outlet side of the lower passage 21. A shower connection passage 28 is provided on the outer peripheral side of the lower passage 21, and a shower hole 29 is formed in the lower portion of the shower connection passage 28.

The housing of the rotary valve 15 is connected to the discharge pipe 23 shown in FIG. The tip end side of the discharge pipe 23 is connected to the raw water passage 24. The raw water passage 24 is communicated with the annular passage 25, and the annular passage 25 is communicated with the passage hole 26. Further, the passage hole 26 is connected to a connection passage 27 for connecting with the cartridge 30.

The cartridge 30 that is detachably attached to the upper portion of the frame 10 in FIG. 1 includes an outer cylinder 31 whose front end is closed. The case 32 is housed in the outer cylinder 31.

As shown in FIGS. 5 to 8, the case 32 has flanges 33 and 34 at both ends thereof, and an activated carbon fiber layer 35 and a non-woven fabric 36 are alternately wound around the outer peripheral side of the case 32. (See FIG. 6). The activated carbon fiber layer 35 is composed of felt of activated carbon fiber, and the activated carbon fiber which constitutes such a felt is made of polyacrylonitrile-based, cellulose-based, pitch-based or phenol-based fiber as a raw material. It is obtained by activation by a method. Such activated carbon fibers are effective in adsorbing and removing organic substances, bactericide components, etc. in raw water, and have a function of adsorbing and removing chlorine and water-bloom in raw water.

A slit-like inlet 40 is formed on the outer peripheral portion of the case 32 of the cartridge 30 as shown in FIGS. 5, 7, and 8. As shown in FIG. 5 and FIG. 7, innumerable hollow fibers 41 are housed in the case 32 in a state of being bent in a U shape, and the ends of the hollow fibers 41 are formed in the case 32. It is opened so as to face the opening portion and is fixed by the encapsulating resin 42. The hollow fiber 41 has innumerable minute pores of 0.01 to 0.1 μm formed on its wall surface so as to remove turbidity parts and bacteria in the raw water.

Examples of such hollow fibers 41 include fiber materials made of high-molecular polymers such as cellulose-based, polyolefin-based, polysulfone-based, and polyvinyl alcohol-based polymers.

Moreover, the opening at one end of the case 32 is closed by the sealing resin 42. An O-ring 43 is attached to the outer peripheral side of one end of the case 32 sealed with the resin 42, and the O-ring 43 is used to seal the connection (see FIG. 1).

A purified water discharge passage 44 is provided in the central portion of the portion of the cartridge 30 in which the case 32 is housed, on the open end side, as shown in FIG. Such a passage 44 is connected to the purified water discharge pipe 45 when the cartridge 30 is connected to the frame 10 as shown in FIG. A float 46 is housed on the tip side of the purified water discharge pipe 45, and is pressed upward in FIG. 1 by a spring 47. The front end side of the purified water discharge pipe 45 including the float 46 is bent into an L shape as shown in FIG. 3 and constitutes a purified water discharge port 48.

Next, the operation of the water purifier having the above configuration will be described. By connecting the connection port 11 of the frame 10 to the water faucet by the adapter ring 12 and the holding nut 13, the water purifier can be attached to the water faucet. When the switching knob 17 is rotated to the upper position in FIG. 4 in such a state, the raw water from the faucet of the water passage passes through the opening 18, the discharge port 20 and the lower passage 21 of the rotary valve 15 and the raw water discharge port 22. Will be directly discharged from. Therefore, in this case, the tap water is not purified at all and is taken out from the raw water discharge port 22 of the frame 10 as it is.

Next, when the switching knob 17 is rotated to the diagonal position shown by the solid line in FIG. 4, the discharge port 20 of the rotary valve 15 is connected to the shower connection passage 28 outside the lower passage 21. Therefore, the tap water that has entered from the upper portion is discharged downward from the shower hole 29 of this shower unit through the opening 18, the discharge port 20 and the shower connection passage 28 of the rotary valve 15. That is, in this case, the tap water is not purified but is discharged like a shower by the shower unit.

Next, when the switching knob 17 is switched to the horizontal position shown by the chain line in FIG. 4, the opening 18 of the rotary valve 15 is connected to the discharge pipe 23 shown in FIG. Therefore, as shown by the arrow in FIG. 1, the raw water from the tap of the tap water has the outlet 20, the exhaust pipe 23, the raw water passage 24, the annular passage 25, the passage hole 26, and the connection passage 27 of the rotary valve 15. Through the cartridge 30 shown in FIG. 7 and is introduced into a gap between the cartridge 30 and the case 32. After this, the raw water passes through the activated carbon fiber layer 35 wound around the outer peripheral surface of the case 32 in the thickness direction thereof, and is introduced into the case through the inflow port 40 of the case 32.

Since the hollow fiber 41 is arranged in the case 32 in a state of being bent in a U shape, the raw water introduced into the case 32 passes through the wall surface of the hollow fiber 41 and the inside of the hollow fiber 41 Break into. Then, it is discharged through the openings at both ends of the hollow fiber, which are fixed by the encapsulating resin 42, and is thereby purified.

The purified water thus obtained is discharged through the purified water discharge passage 44, the purified water discharge pipe 45, and the purified water discharge port 48. That is, the purified water purified in the cartridge 30 of this water purifier is obtained through the purified water discharge port 48. Then, the flow rate at this time is visually detected from the position of the float 46 moved against the spring 47.

In the cartridge 30 of the water purifier for purifying tap water in this manner, the inflow port 40 of the case 32 is in the axial direction of the case 32 as shown in FIG. 7 and FIG. It has the smallest aperture ratio in the part where the aperture is provided, and the largest aperture ratio in the part on the opposite side. Such changes in the opening ratio are shown in FIG.

As described above, the cartridge 30 having the larger opening ratio is used toward the inner side when viewed from the side where water flows in. The inlet 40 has a rectangular shape and a length of 20 mm. Is constant, and the width is variable so that the width is gradually expanded to 1 to 5 mm. The flow rate of the cartridge 30 is 2 to 5 l / min, and the thickness of the activated carbon fiber layer 35 wound around the outer periphery of the flanges 33 and 34 of the case 32 is 7 mm.

FIG. 9 is a graph showing a change in the opening ratio of the inflow port 40 of the case 32. The activated carbon fiber layer in which raw water is wound around the outer cylinder 31 and the outer peripheral surface of the case 32 is shown. The opening ratio of the first inflow port 40 is set to 0 when the inflow is made through the gap between the inflow port 35 and 35 and is cleaned by the activated carbon fiber layer 35 of the case 32 and the hollow fiber 41. The opening ratio up to the inflow port 40 is shown. The opening ratio is the ratio of the opening area to the area formed by the width of the case 32 in the arbitrary lengthwise direction, which is shown as a percentage.

By providing the inflow port 40 whose opening ratio increases as it goes deeper in this way, since the water pressure of the raw water is higher at the inlet portion of the outer cylinder 31, the passage of water in the deeper direction is achieved. It is possible to prevent the flow of water from concentrating at the entrance because it becomes lower. That is, by making the area of the inflow port 40 wide in the inner part, it is possible to uniformly fluidize the raw water, and as a result, the raw water flows evenly over the entire surface of the activated carbon fiber layer 35 and the entire hollow fiber 41. become.

FIG. 10 shows a modified case 32. The case 32 has a circular inlet 40 formed on the outer peripheral surface thereof between the flanges 33 and 34. Moreover, the size of the inlet 40 is changed so that the end of the case 32 where the opening of the case 32 is formed is made smaller and the opposite end is made larger. As a result, the opening ratio of the inflow port 40 is changed as shown in FIG. Therefore, also in this modified example, it is possible to obtain the same effect as that of the above-described embodiment.

The shape of the inflow port 40 formed on the outer peripheral surface of the case 32 can be variously changed in order to achieve the above object. For example, as shown in FIG. 11, the inlets 40 may be formed in a zigzag shape, or as shown in FIG. 12, the inlets 40 may have a plurality of slender triangular shapes whose longitudinal widths change in order. You may form individually. When the inflow port 40 having such a shape is used, the aperture ratio changes smoothly.

In short, the inflow port 40 formed on the outer peripheral surface of the case 32 may be such that the opening ratio changes sequentially from the part where the opening of the case 32 is formed to the inner part thereof. It can be arbitrarily selected according to the strength, ease of manufacture, target of filtration performance, etc. Further, an arbitrary shape can be selected for the opening of the inflow port 40 of the case 32.

Moreover, on the outer peripheral surface of the case 32 wound with the activated carbon fiber layer 35 and the inlet 40 is formed, as shown in FIG. 5, FIG. 7, FIG. 8 and FIG. As shown, a recess 51 is formed at an intermediate portion in the axial direction of the flanges 33, 34 leaving a predetermined distance L therebetween. Then, a rough non-woven fabric 52 is arranged in the recess 51.

The distance L is larger than the thickness D of the activated carbon fiber layer 35. Therefore, the activated carbon fiber layer 35 wound around the outer peripheral surface of the case 32 is shown in FIG. As described above, the inflow port 40 does not exist for a distance L longer than the thickness D of the activated carbon fiber layer 35, and the activated carbon fiber layer 35 is brought into close contact with the outer peripheral surface of the case 32.

Therefore, even if the raw water passes through the end surface of the activated carbon fiber layer 35 and the joint surface with the flanges 33, 34, when the raw water further flows in the axial direction, the section of the distance L is small. Both must pass through the activated carbon fiber layer 35. That is, the activated carbon fiber layer 35 passes through the activated carbon fiber layer 35 for a distance L longer than the distance D corresponding to the thickness of the activated carbon fiber layer 35. At this time, the activated carbon fiber layer 35 is used for purification. Therefore, the chlorine odor and the blue-green odor will be removed. In this embodiment, L is 8 mm and D is 7 mm.

In addition, except for the outer peripheral surface of the case 32 at both ends where the activated carbon fiber layer 35 is closely adhered, a rough non-woven fabric 52 is provided between the outer peripheral surface of the case 32 and the activated carbon fiber layer 35 as a recess 51. It is intervened while being housed inside. Therefore, the activated carbon fiber layer 35 does not come into direct contact with the outer peripheral surface of the case 32, and the activated carbon fiber layer 35 can be effectively used even in a region other than the portion where the inflow port 40 is formed. This makes it possible to evenly distribute the water flow over almost the entire surface of the activated carbon fiber layer 35, prevent clogging of the activated carbon fiber layer 35, and perform stable filtration over a long period of time.

FIG. 13 shows a modified example. In this modified example, the protrusions 55 are formed in a grid pattern on the outer peripheral surface of the case 32 between the inflow ports 40. The activated carbon fiber layer 35, which is wound around the outer peripheral surface of the case 32 and between the flanges 33 and 34 by such a ridge 55, has a gap between the outer peripheral surface of the case 32. Therefore, also in such a modified example, it is possible to obtain the same operational effect as that of the above-described embodiment.

FIG. 14 shows a case 32 of another modified example. The case 32 has a coarse net 56 wound around its outer peripheral surface. Even with such a rough net 56, it is possible to form a gap between the activated carbon fiber layer 35 and the outer peripheral surface of the case 32, and the inflow port 40 is not formed due to such a gap. Even in the portion, water can be uniformly distributed in the activated carbon fiber layer 35, and it is possible to achieve the same effects as the above-described embodiment.

The present invention has been described above with reference to the illustrated embodiment, but the present invention is not limited to the above embodiment, and various modifications can be made based on the technical idea of the present invention. For example, in the above embodiment, the activated carbon fiber layer 35 is arranged on the outer peripheral side of the case 32, and the hollow fiber 41 is housed in the case 32. However, one of these filtration materials is used. Alternatively, it is possible to replace the two kinds with another filter material. That is, various kinds of filtration materials such as coral sand, ion exchange membrane, granular activated carbon and molded activated carbon can be used, and such filtration material can be replaced with the activated carbon fiber layer 35 or the hollow fiber 41. It is possible.

[0046]

[Effect of device]

 According to a first aspect of the invention, a first filter material is arranged in a case having an opening at one end, and a plurality of inlets are formed on the outer peripheral surface of the case, and the inlets are formed. A second filter material is arranged on the outer peripheral surface of the case, and the case is housed in an outer cylinder whose one end is open and the other end is closed. The gap with the peripheral surface is used as a raw water passage, and the raw water introduced from the opening at one end of the outer cylinder permeates through the second filtration material on the outer peripheral surface of the case and then the first water inside the case. The end that passes through the filter material and is discharged from the opening at one end of the case, and the opening ratio of the inlet formed on the outer peripheral surface of the case is in the axial direction of the case and the opening at one end of the case is formed. It is designed to grow as it goes from one part to the other end.

Therefore, according to such a configuration, the opening ratio of the inlet is particularly increased in the axial direction of the case from the end where the opening is formed to the opposite end. Therefore, it is possible to suppress the flow rate at the inlet side where the water pressure is high and increase the flow rate at the back side where the water pressure becomes low, which makes it possible to balance the flow rate of the raw water as a whole. It becomes possible to obtain purified water by filtering more uniformly.

A second invention is to arrange hollow fibers in a U-shaped bent state in a case having an opening at one end, with the open ends of both ends of the hollow fiber facing the opening of the case. The case is fixed by the encapsulant, one end of the case is closed by the encapsulant, and the case is housed in an outer cylinder whose one end is open and the other end is closed. The gap between the inner peripheral surface of the case and the inner peripheral surface is the raw water passage, the activated carbon fiber layer is provided on the outer peripheral surface of the case, and the raw water flows so as to permeate the activated carbon fiber layer in the thickness direction. A plurality of inlets are formed on the outer peripheral surface of the hollow fiber, and the raw water that permeates the activated carbon fiber layer and is introduced into the case through the inlets passes through the wall surface of the hollow fiber and enters the hollow fiber. So that it is discharged through the open ends at both ends, The opening ratio of the inlet formed on the outer peripheral surface of the case is such that it increases in the axial direction of the case and goes from the end where the opening is formed at one end of the case to the opposite end. Is.

Therefore, according to such a structure, the opening ratio of the inflow port is increased particularly in the axial direction of the case from the end where the opening at one end is formed to the end on the opposite side. Therefore, it is possible to suppress the flow rate at the inlet side where the water pressure is high and increase the flow rate at the back side where the water pressure becomes low, which makes it possible to balance the flow rate of the raw water as a whole. It becomes possible to obtain purified water by filtering more uniformly.

In a third invention, hollow fibers are arranged in a U-shaped bent state in a case having one end open, and both ends of the hollow fiber face the opening of the case. The case is fixed by the encapsulant, one end of the case is closed by the encapsulant, and the case is housed in an outer cylinder whose one end is open and the other end is closed. A gap between the inner peripheral surface of the cylinder and a raw water passage is formed, and an activated carbon fiber layer is provided on the outer peripheral surface of the case. The raw water flows so as to pass through the activated carbon fiber layer in its thickness direction, A plurality of inflow ports are formed on the outer peripheral surface of the case, and the raw water that has passed through the activated carbon fiber layer and is introduced into the case through the inflow ports passes through the wall surface of the hollow fibers and enters the hollow fibers. Allow the fibers to exit through the open ends at both ends and The opening ratio of the inlet formed on the outer peripheral surface of the case is increased in the axial direction of the case and from the end where the opening at one end of the case is formed to the opposite end, The activated carbon fiber layer provided on the outer peripheral surface of the case is made to be in close contact with the outer peripheral surface of the case by a distance corresponding to at least the thickness of the activated carbon fiber layer from both ends in the axial direction thereof. A member for separating the activated carbon fiber layer from the outer peripheral surface of the case is provided on the outer peripheral surface except for the contact portion.

Therefore, according to such a configuration, the opening ratio of the inflow port is increased in particular in the axial direction of the case from the end portion where the opening is formed to the opposite end portion. Therefore, it is possible to suppress the flow rate at the inlet side where the water pressure is high and increase the flow rate at the inner part where the water pressure becomes low, which makes it possible to balance the flow rate of raw water as a whole. It becomes possible to filter water more uniformly and obtain purified water.

Further, the activated carbon fiber layer is brought into close contact with the outer peripheral surface of the case by a distance corresponding to at least the thickness of the activated carbon fiber layer from both ends in the axial direction, and both ends in the axial direction of the activated carbon fiber layer. The raw water that passes through the gaps in the active carbon fiber layer will pass through the activated carbon fiber layer for at least the length corresponding to the thickness of the activated carbon fiber layer, and thus the raw water will not be filtered by the activated carbon fiber layer. It is possible to prevent raw water from being introduced into the inflow port.

Further, due to the separating member provided between the activated carbon fiber layer and the outer peripheral surface of the case, a gap is formed between the activated carbon fiber layer and the case. In the area corresponding to the part where the inlet is not provided, the raw water flows in the activated carbon fiber layer, and the water flow can be uniformly distributed. This makes it possible to effectively utilize almost the entire area of the activated carbon fiber layer for filtration.

[Submission date] March 25, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

Further, when the activated carbon fiber layer is wound so as to be directly adhered to the outer peripheral surface of the case, raw water easily passes directly through the portion corresponding to the inlet of the activated carbon fiber layer, but the inlet is provided. It becomes difficult for the raw water to pass through the activated carbon fiber layer wound around the outer peripheral side of the unwound area. That is, the water is locally unevenly distributed only in the portion corresponding to the inlet of the activated carbon fiber layer, which hinders the effective use of the entire surface of the activated carbon fiber layer.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

Next, when the switching knob 17 is switched to the horizontal position shown by the chain line in FIG. 4, the opening 18 of the rotary valve 15 is connected to the discharge pipe 23 shown in FIG. Therefore, the raw water from the tap is shown in FIG. 1 by the arrow, the opening 18 of the rotary valve 15, the discharge pipe 23, the raw water passage 24, the annular passage 25, the passage hole 26, and the connection passage 27. Through the cartridge 30 shown in FIG. 7 and is introduced into a gap between the cartridge 30 and the case 32. After this, the raw water passes through the activated carbon fiber layer 35 wound around the outer peripheral surface of the case 32 in the thickness direction thereof, and is introduced into the case through the inflow port 40 of the case 32.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the overall structure of a water purifier.

FIG. 2 is a vertical sectional view showing the overall structure of the water purifier.

FIG. 3 is a vertical sectional view showing a portion of a water purifier discharge port.

FIG. 4 is a side view showing the appearance of the case.

FIG. 5 is a sectional view of a cartridge.

FIG. 6 is an external perspective view of a case in which activated carbon fiber layers and non-woven fabric are alternately wound.

FIG. 7 is a vertical cross-sectional view of a cartridge.

FIG. 8 is an external perspective view of a case.

FIG. 9 is a graph showing changes in aperture ratio.

FIG. 10 is an external perspective view showing a case of a modified example.

FIG. 11 is an external perspective view showing a case of a modified example.

FIG. 12 is an external perspective view showing a case of a modified example.

FIG. 13 is an external perspective view showing a case of another modification.

FIG. 14 is an external perspective view showing a case of still another modified example.

[Explanation of symbols]

 10 Frame 11 Connection Port 12 Adapter Ring 13 Holding Nut 14 Packing 15 Rotary Valve 16 Spindle 17 Switching Knob 18 Opening 20 Discharge Port 21 Lower Passage 22 Raw Water Discharge Port 23 Discharge Pipe 24 Raw Water Passage 25 Annular Passage 26 Passage Hole 27 Connection Passage 28 Shower Connection Passage 29 Shower Hole 30 Cartridge 31 Outer Cylinder 32 Case 33, 34 Flange 35 Activated Carbon Fiber Layer 36 Nonwoven Fabric 40 Inlet 41 Hollow Fiber 42 Encapsulating Resin 43 O-ring 44 Purified Water Discharge Passage 45 Clean Water Discharge Pipe 46 Float 47 Spring 48 Purified water outlet 51 Recess 52 Nonwoven fabric 55 Ridge 56 Coarse net

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 25, 1994

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toyohiko Takatsuki, Inventor, 1-20-5 Tenma, Kita-ku, Osaka City, Osaka Prefecture Mahobin Co., Ltd. (72) Masahiro Yoshida 1-20, Tenma, Kita-ku, Osaka, Osaka Prefecture No. 5 inside Zojirushi Mahobin Co.

Claims (3)

[Scope of utility model registration request] 1. A first case in a case having an opening at one end.
And a plurality of inlets are formed on the outer peripheral surface of the case, and a second filter is formed on the outer peripheral surface of the case in which the inlets are formed.
The case is housed in an outer cylinder having one end opened and the other end closed, and a gap between the outer peripheral surface of the case and the inner peripheral surface of the outer cylinder. Is a raw water passage, and the raw water introduced from the opening at one end of the outer cylinder permeates the second filtration material on the outer peripheral surface of the case, and further the first filtration material in the case. An end of the case through which the light is transmitted and discharged from the opening at one end of the case, and the opening ratio of the inlet formed on the outer peripheral surface of the case is in the axial direction of the case and the opening at the one end of the case is formed. A water purification cartridge characterized in that it becomes larger as it goes from one part to the other end. 2. An encapsulating material in which a hollow fiber is arranged in a U-shaped bent state in a case having an opening at one end, and open ends of both ends of the hollow fiber face the opening of the case. And the case is closed at one end by the encapsulant, the case is housed in an outer cylinder having one end opened and the other end closed, and the case is on the outer peripheral side of the case. The gap between the inner peripheral surface of the cylinder is a raw water passage, an activated carbon fiber layer is provided on the outer peripheral surface of the case,
Raw water flows through the activated carbon fiber layer so as to permeate through the activated carbon fiber layer, and a plurality of inlets are formed on the outer peripheral surface of the case. The raw water permeates the activated carbon fiber layer and passes through the inlet to the inside of the case. The raw water introduced into the hollow fiber passes through the wall surface of the hollow fiber, enters the hollow fiber, and is discharged through the open ends of the hollow fiber. The water purification cartridge is characterized in that the opening ratio is increased in the axial direction of the case from the end where the opening at one end of the case is formed to the opposite end. 3. An encapsulating material in which a hollow fiber is arranged in a U-shaped bent state in a case having an opening at one end, and the open ends of both ends of the hollow fiber face the opening of the case. And the case is closed at one end by the encapsulant, the case is housed in an outer cylinder having one end opened and the other end closed, and the case is on the outer peripheral side of the case. The gap between the inner peripheral surface of the cylinder is a raw water passage, an activated carbon fiber layer is provided on the outer peripheral surface of the case,
Raw water flows through the activated carbon fiber layer so as to permeate through the activated carbon fiber layer, and a plurality of inlets are formed on the outer peripheral surface of the case. The raw water permeates the activated carbon fiber layer and passes through the inlet to the inside of the case. The raw water introduced into the hollow fiber passes through the wall surface of the hollow fiber to enter the hollow fiber, and is discharged through the open ends of the hollow fiber, and an inlet port formed on the outer peripheral surface of the case. Is provided on the outer peripheral surface of the case in such a manner that the opening ratio of the case increases in the axial direction of the case from the end where the opening is formed at one end of the case to the opposite end. The activated carbon fiber layer is brought into close contact with the outer peripheral surface of the case by a distance corresponding to at least the thickness of the activated carbon fiber layer from both ends in the axial direction, and the activated carbon is adhered to the outer peripheral surface of the case. A water purification cartridge characterized in that a member is provided for separating the elemental fiber layer from the outer peripheral surface of the case except for the contact portion.