JP2006212578A - Water cleaner cartridge and water cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water cleaner cartridge capable of suppressing the growth of various bacteria even when an antibacterial function of a filter is deteriorated, and a water cleaner. <P>SOLUTION: The water cleaner cartridge 38 is accommodated and placed in a vessel 32 of the water cleaner 31. The water cleaner cartridge 38 has a cylindrical filtration part 41, an inside filter 45 at the upside thicker than an inside filter 46 at a lower side and a high water pass resistance. Since raw water passes through a lower filtration part 47b having a thick filter bed and a fluidized filter bed 52, most chloride contents are removed. On the other hand, since the raw water flowing in a sub-flow path S passes through an upper filtration part 47a having a thin filter bed, the amount of residual chloride is larger than the raw water passing through a main flow path M. Thus, a filtrate relatively containing chloride is provided to suppress the growth of the various bacteria. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a water purification cartridge and a water purifier that are used, for example, in a juice dispenser and used to filter raw water such as tap water.

  Conventionally, as this kind of water purifier, for example, Patent Document 1 has proposed a structure as shown in FIG. That is, in this conventional configuration, the water purification cartridge 13 is accommodated in the container 12 of the water purifier 11. The water purification cartridge 13 includes a filtration unit 14, an upper lid 15 a attached to the upper end of the filtration unit 14, and a lower lid 15 b attached to the lower end of the filtration unit 14. An outlet 21 is integrally formed at the center of the upper surface of the upper lid 15a. The filtration unit 14 includes a large-diameter cylindrical outer filter 18 made of a porous material, and a small-diameter cylindrical inner filter 19 made of a porous material arranged on the same axis in the outer filter 18. . A cylindrical gap between the outer filter 18 and the inner filter 19 is filled with a filter medium 20 made of granular activated carbon.

When the water purifier 11 is used, raw water such as tap water flows from the inlet 16 of the container 12 and fills the container 12. In this state, when a water supply pump in a water supply pipe for supplying purified water (not shown) connected to the outlet 17 of the container 12 is activated, the raw water in the container 12 becomes the outer filter 18, the filter medium 20, and the inner filter 19. Is passed through the communication passage 22 in the inner filter 19. Accordingly, raw water is supplied into the container 12 from the inlet 16. By filtering the raw water, foreign substances and bacteria contained in the raw water are removed. Thereafter, the filtered purified water flows out from the communication passage 22 through the outlet 21 and the outlet 17 to the water supply pipe side and is used.
JP 2004-82067 A

  However, in the above water purification cartridge 13, simply filtering raw water through the filter medium 20 removes sterilizing chlorine in the raw water, so that germs propagate in the downstream pipe from the water purification cartridge 13. There is a risk of doing so.

  For this reason, it is also conceivable to use a granular activated carbon that constitutes the filter medium 20 with an antibacterial coating such as silver. When comprised in this way, an antibacterial coating elutes in clean water and suppresses propagation of various bacteria. However, if raw water filtration is continued, the antibacterial coating becomes thin, the amount of elution decreases, the antibacterial function gradually decreases, and the propagation of various bacteria cannot be suppressed.

  An object of the present invention is to provide a water purification cartridge and a water purifier that can suppress the propagation of germs even when the antibacterial function of the filter medium is lowered.

  In order to achieve the above object, the invention according to claim 1 has an antibacterial filtration part, a main flow path for carrying out an antibacterial filtration treatment of raw water, and a normal filtration part, and a large amount of chlorine remains. And a sub flow path for filtering raw water, wherein the water flow resistance of the sub flow path is higher than the water flow resistance of the main flow path.

  Therefore, in the first aspect of the present invention, when a large amount of raw water flows, such as when the feed water pump is started, a part of the raw water is filtered through the sub flow channel. For this reason, even if the filtered water having a relatively high chlorine content is supplied to the downstream side of the water purifier and the function of the antibacterial filtration part is lowered, the antibacterial function can be maintained by chlorine.

  According to a second aspect of the present invention, in the first aspect of the present invention, the main flow path and the sub flow path are each configured by providing a filter medium between opposed filters, and the water flow of the sub flow path filter The resistance is higher than the water flow resistance of the filter in the main flow path.

Therefore, in the invention according to the second aspect, since the water resistance of the filter holding the filter medium is only set, the number of parts stores is not increased and the structure is simple.
The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the filtering capacity of the main channel is made higher than the filtering capacity of the sub-channel.

Therefore, in the invention described in claim 3, since the filtration capacity of the main channel is high, a sufficient filtration capacity can be obtained as a result.
In invention of Claim 4, in the invention as described in any one of Claims 1-3, the said main flow path is a flow filtration part which enabled the flow of the granular filter material which gave antibacterial coating. And the fluid filtration part is the antibacterial treatment part.

Therefore, in the invention described in claim 4, antibacterial ions can be effectively eluted from the filtered water, and an effective antibacterial function can be obtained.
According to a fifth aspect of the present invention, in the first aspect of the present invention, the cylindrical outer filter and the first and first axially disposed adjacent to the outer filter are arranged coaxially with the outer filter. And a filter medium interposed between the outer filter and the inner filters, wherein the water resistance of the first filter is higher than the water resistance of the second filter.

Therefore, in invention of Claim 5, the whole can be formed in a cylindrical shape and it is convenient to accommodate in the container of a water purifier.
In invention of Claim 6 which concerns on a water purifier, the water purification cartridge as described in any one of Claims 1-5 was accommodated in the container, and it was used, It is characterized by the above-mentioned.

  Therefore, in the invention described in claim 6, the effects of the invention described in claims 1-5 can be obtained.

  As described above, in the present invention, even if the function of the antibacterial filtration unit is reduced, the effective antibacterial function can be maintained and the piping system can be kept clean.

An embodiment embodying the present invention will be described below with reference to FIGS.
A container 32 of the water purifier 31 is formed in a bottomed cylindrical shape, and a lid 33 is detachably attached to a top opening of the water purifier 31 via a seal ring 34 by a stopper 35. The container 32 and the lid 33 are made of a metal such as stainless steel. A cylindrical inlet 36 for allowing raw water such as tap water to flow in is disposed at a position deviated from the center of the top wall of the lid 33. In the center of the top wall of the lid 33, a cylindrical outlet 37 for allowing the filtered water to flow out is disposed.

  Between the container 32 and the lid 33, a water purification cartridge 38 is detachably accommodated and disposed with a predetermined gap between its peripheral side and lower part and the inner surface of the container 32. That is, a cylindrical outlet 39 protrudes from the center of the top of the water purification cartridge 38, and a screw portion 40 is formed on the outer surface thereof. Then, by inserting the water purification cartridge 38 into the container 32, the position of the bottom of the water purification cartridge 38 comes into contact with the inner bottom of the container 32 and is regulated. Further, in this state, by closing and attaching the lid 33 to the upper end opening of the container 32, the outlet 39 on the water purification cartridge 38 is screwed into the screw 37 a of the outlet 37 of the lid 33 via the screw 40. In combination, the outlet 39 and the outlet 37 are connected.

  As shown in FIG. 1, the water purification cartridge 38 includes a cylindrical filtration portion 41, an upper lid 42 attached to the upper end portion of the filtration portion 41, and a lower lid 43 attached to the lower end portion of the filtration portion 41. It has. The outlet 39 is integrally formed at the center of the upper surface of the upper lid 42. The filtration unit 41 includes a large-diameter cylindrical outer filter 44 made of a porous material or non-woven fabric, and a small-diameter cylindrical upper inner filter 45 made of a porous material or non-woven fabric disposed on the same axis in the outer filter 44. And a lower inner filter 46.

  A cylindrical gap between the outer filter 44 and the inner filters 45 and 46 is filled with a filter medium 47 made of granular activated carbon. In this granular activated carbon, a predetermined proportion (for example, 10%) of the activated carbon particles has an antibacterial coating such as silver, which suppresses the propagation of germs in the filter medium 47. ing.

  An intermediate plate 49 having a plurality of small holes 48 formed thereon is placed on the upper end of the lower inner filter 46, and the upper inner filter 45 is placed on the outer periphery of the upper surface of the intermediate plate 49.

  The lower inner filter 46 is, for example, 3 mm thick, the upper inner filter 45 is, for example, 5 mm thick, and the upper inner filter 45 is thick. Further, the filter medium 47 has a thick filter bed of the upper filter part 47 a corresponding to the lower inner filter 46 and a thin filter bed of the lower filter part 47 b corresponding to the upper inner filter 45. And even if the upper filtration part 47a is thick, since the lower inner filter 46 is thin, compared with the upper filtration part 47a, the water flow resistance by the side of the lower filtration part 47b is low. A lower chamber 50 is formed by the lower lid 43, the lower inner filter 46 and the intermediate plate 49, and an upper chamber 51 is formed by the upper lid 42, the upper inner filter 45 and the intermediate plate 49. The upper chamber 51 accommodates a fluidized filter bed 52 made of granular activated carbon coated with silver, and the granular activated carbon as the granular filter medium can flow in the upper chamber 51 by a water flow. The fluid filtration bed 52 constitutes a fluid filtration part, an antibacterial filtration part, and an antibacterial treatment part.

  In this embodiment, a main flow path M that reaches the outlet 39 is formed by the outer filter 44, the upper filtration part 47 a, the lower inner filter 46, the lower chamber 50, the small holes 48, and the upper chamber 51. Further, a sub flow path S that reaches the outlet 39 is formed by the outer filter 44, the lower filtration part 47 b, the upper inner filter 45, and the upper chamber 51. Therefore, the water flow resistance of the main flow path M is lower than the water flow resistance of the sub flow path S.

A cylindrical portion 63 having a through hole 61 is formed integrally with the upper lid 42 and the lower lid 43, and a bypass cylinder 62 is fitted and connected between the cylindrical portions 63.
Now, when the water purifier 31 is used, raw water such as tap water flows from the inlet 36 of the container 32 and fills the container 32. In this state, when a water supply pump (not shown) in a water supply pipe for supplying purified water (not shown) connected to the outlet 37 is activated, water in the pipe is temporarily supplied to the water supply pump at the time of activation. A large amount is sucked. For this reason, the raw water flows through both the main flow path M and the sub flow path S. The raw water flowing through the main flow path M is filtered by the lower filtration unit 47b, filtered again by the fluidized filter bed 52, and flows out to the water supply pipe side through the outlet 39 and the outlet. In addition, the raw water flowing through the sub flow path S is filtered by the upper filtration part 47a and flows out from the outlet 39 and the outlet.

  At this time, since the raw water flowing through the main flow path M passes through the lower filtration part 47b having a thick filter bed and the fluidized filter bed 52, most of the contained chlorine is removed, and the fluidized filter bed 52 contains silver ions. . For this reason, it becomes the filtered water to which the antibacterial action was effectively added. On the other hand, since the raw water flowing through the sub flow path S passes through the upper filtration part 47a having a thin filter bed, the amount of residual chlorine is larger than that of the raw water passing through the main flow path M. For this reason, it becomes the filtered water containing a comparatively chlorine.

  Thereafter, when the feed water pump shifts to a steady operation state, the suction pressure of the feed water pump decreases, so that the raw water hardly flows through the sub-flow channel S having a high water flow resistance, and the main flow channel M having a low water flow resistance. Filtered through.

  A part of the raw water from the inlet 36 is bypassed via the bypass cylinder 62 and filled in the container 32. Therefore, the raw water flows from two opposite directions, and the retention of the raw water in the container 32 can be suppressed.

In this embodiment described above, the following effects are exhibited.
-When the water supply pump is started, purified water containing a large amount of residual chlorine is supplied through the sub-channel S. In other words, a relatively large amount of chlorine flows in the treated water supply system after the water purifier every time the feed pump is activated. Therefore, even if the silver coating of the fluidized filter bed 52 becomes thin and the amount of silver ions eluted decreases, the residual chlorine in the purified water supplied through the sub-flow channel S every time the feed water pump is activated causes the piping system Proliferation of various bacteria can be suppressed.

  -The purified water containing a lot of residual chlorine supplied through the sub-flow channel S is supplied only when the water supply pump is started. Moreover, since the upper filtration part 47a of the filter medium 47 is also present in the sub-channel S, a considerable amount of chlorine is removed. Therefore, even if purified water is supplied through the sub-flow channel S and used for beverages, it does not feel the odor of wood.

In addition, this invention is not limited to the said embodiment, It can embody in the following aspects.
-Omit the fluid filter bed 52. In this case, it is preferable to increase the ratio of the activated carbon particles coated with silver as the granular activated carbon of the filter medium 47.

  -Provide another filter medium such as fibrous activated carbon instead of the fluidized filter bed 52.

Sectional drawing of the water purification cartridge which actualized this invention. Similarly sectional drawing of a water purifier. Sectional drawing which shows a conventional structure.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 31 ... Water purifier, 32 ... Container, 38 ... Water purification cartridge, 41 ... Filtration part, 44 ... Outer filter, 45 ... Inner filter, 46 ... Inner filter, 47 ... Filter medium, 52 ... Fluid filtration bed, M ... Main flow path, S: Sub-channel.

Claims (6)

A main flow path that has an antibacterial filtration part and performs an antibacterial filtration treatment of raw water, and a sub-flow path that normally has a filtration part and filters raw water so that a large amount of chlorine remains,
A water purification cartridge characterized in that the water flow resistance of the sub flow path is higher than the water flow resistance of the main flow path. The main flow path and the sub flow path are each configured by providing a filter medium between opposed filters, and the water flow resistance of the filter in the sub flow path is made higher than the water flow resistance of the filter in the main flow path. The water purification cartridge according to claim 1. The water purification cartridge according to claim 1 or 2, wherein the filtration capacity of the main flow path is higher than the filtration capacity of the sub flow path. The said main flow path has the flow filtration part which enabled the flow of the granular filter material which gave the antibacterial coating, This flow filtration part was made into the antibacterial process part, The any one of Claims 1-3 characterized by the above-mentioned. The water purification cartridge according to one item. A cylindrical outer filter, first and second inner filters arranged coaxially with the outer filter, and adjacent to each other in the axial direction, and a filter medium interposed between the outer filter and both inner filters The water purification cartridge according to claim 1, wherein the water flow resistance of the first filter is higher than the water flow resistance of the second filter. A water purifier using the water purification cartridge according to any one of claims 1 to 5 in a container.

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