JP2009056400A - Apparatus for adjusting quality of water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for adjusting the quality of water in which the clogging of a flow passage can be prevented by an extremely simple constitution. <P>SOLUTION: A sequestering material 33 is placed downstream from a water-softening filter medium-packed part packed with a water-softening filter medium consisting of an ion exchange resin 19, raw water is softened by the ion exchange resin 19 and the sequestering material 33 is eluted in the softened water. A water absorbing member 20 is placed between the ion exchange resin 19 and the sequestering material 33. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water quality adjusting device used for adjusting the quality of raw water in, for example, kitchen equipment that heats water or generates steam.

  In general, in kitchen equipment such as a steam convention oven that heats food by putting steam into the cabinet, when raw water such as tap water is supplied directly to the heating part, hardness components such as calcium and magnesium contained in the raw water Causes a scale in the steam generator. And this scale may adhere to the boiler heat-transfer surface of a steam generation part, or may accumulate on a water level sensor, a drain pipe, etc., and there existed a possibility of interfering with operation of kitchen equipment.

  For this reason, generally, the quality of raw water is adjusted by connecting a water quality adjusting device such as a water softener to the water supply pipeline of the kitchen equipment. That is, in this water quality adjusting device, a filter medium filling unit filled with a filter medium made of an ion exchange resin is provided. Then, by passing the raw water through the filter medium filling part, ions contained in the raw water are ion-exchanged by the cation exchange resin in the filter medium filling part, and the raw water is softened.

  However, if such a water quality control device such as a water softener is continuously used, the exchange reaction group of the ion exchange resin is exchanged with the ionic substance contained in the raw water, and the ion exchange capacity of the ion exchange resin is reduced. , Softening water efficiency decreases. For this reason, it is necessary to frequently replace the filter medium filling portion such as a cartridge filled with an ion exchange resin with one filled with a new ion exchange resin, which increases the management cost.

  In order to cope with such a problem, for example, a water quality adjusting device having a configuration as disclosed in Patent Document 1 has been proposed. That is, in this conventional configuration, an ion exchange resin container that accommodates a cartridge filled with an ion exchange resin and a regenerative material container that replaceably accommodates a cartridge filled with a regenerative material for regenerating the ion exchange resin are equipped. Has been. Further, the water outlet of the recycled material container is connected to the water inlet of the ion exchange resin container via a connection hose. Then, in a state where the cartridge filled with the recycled material is accommodated in the recycled material container, water is passed through the recycled material container to the ion exchange resin container, so that the recycled material is dissolved in the water and the resin container cartridge To be supplied. For this reason, the exchange reaction ions in the regenerated material solution and the ions captured by the ion exchange resin are exchanged to regenerate the ion exchange resin.

  However, in this conventional water quality adjusting device, every time the ion exchange capacity of the ion exchange resin decreases, it is necessary to frequently regenerate the ion exchange resin with the regenerated material, which is troublesome. Further, since it is necessary to set a cartridge filled with a new reclaimed material in the reclaimed material container every time the ion exchange resin is regenerated, the management cost becomes high as described above.

  In order to solve this problem, a water quality adjusting device described in Patent Document 2 has been proposed. As shown in FIG. 9, the water quality adjusting device of Patent Document 1 includes a synthetic resin cartridge 112 serving as a filter medium filling portion in a stainless steel outer case 111, and an ion exchange resin having a granular shape inside the cartridge 112. Many 113 are filled. And the ion contained in raw | natural water is ion-exchanged by the ion exchange resin 113, and raw | natural water is softened.

  Furthermore, a metal ion sequestering material container 114 is disposed at the inner bottom of the cartridge 112. A metal ion sequestering material (such as sodium polyphosphate) 115 is accommodated inside the metal ion sequestering material container 114. Then, when the softened water that has passed through the ion exchange resin 113 in the cartridge 112 flows into the metal ion sequestering material container 114, the metal ion sequestering material 115 is eluted in the softened water, and the mineral content is sequestered. Thus, when the metal ion sequestering material 115 is eluted in the softened water, the mineral content contained in the softened water, for example, calcium or magnesium reacts with the metal ion sequestering material 115 to be sequestered, and calcium phosphate or magnesium phosphate One kind of hydroxyapatite is produced. Since these products only float in the softened water and are difficult to scale, the ion exchange ability of the ion exchange resin 113 is reduced, and scale is generated even if calcium or magnesium remains in the softened water. Can be suppressed.

Therefore, the raw water is softened by the ion exchange resin 113, and then a small amount of the metal ion sequestering material 115 is eluted in the softened water. However, when the ion exchange capacity of the ion exchange resin 113 decreases, The metal ion sequestering material 115 eluted in can supplement the decrease in softening efficiency. For this reason, it is not necessary to frequently exchange or regenerate the ion exchange resin, the softening water efficiency can be maintained for a long time, and an increase in management cost can be suppressed.
JP-A-9-141259 JP 2006-263718 A

  By the way, the ion exchange resin 113 filled in the cartridge 112 of the water quality adjusting device normally contains 40% to 50% of moisture in an unused state, that is, not immersed in raw water. This amount of moisture constantly fluctuates according to the humidity of the outside air. That is, the ion exchange resin 113 has the property of releasing moisture when the ambient humidity is low, and absorbing moisture when the ambient humidity is high. The metal ion sequestering material 115 coexisting with the ion exchange resin 113 comes into contact with the moisture, and the outer surface contains moisture. A filter provided in a narrow part or water channel is closed. In other words, a part of the water that has not been absorbed by the ion exchange resin 113 is condensed on the inner surface of the 114 container containing the metal ion sequestering material 115. Then, it is considered that the metal ion sequestering material 115 comes into contact with the dew condensation and the metal ion sequestering material 115 starts to dissolve. As described above, when a water channel, a filter, or the like is blocked, a failure that water does not come out occurs when the water quality adjusting device is actually connected to a pipe.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a water quality adjusting device capable of preventing the above-described blockage with a very simple configuration.

  In order to achieve the above object, in the first aspect of the present invention, a metal ion sequestering material is provided on the downstream side of the water softening filter medium filling portion filled with the water softening filter medium made of an ion exchange resin, and the raw water is used as the soft water. A water quality adjusting device configured to soften water with a filter material and to elute a metal ion sequestering material into the softened water is characterized in that a water absorbing member is provided. Here, each of the water softening filter medium, the metal ion sequestering material, and the water absorbing member has a granular shape.

  In invention of Claim 2, in the invention of Claim 1, a water absorbing member is comprised with granular activated carbon with an average particle diameter of 40-100 mesh, and the quantity of the water absorbing member is 5. The amount is more than 0 weight percent.

The invention described in claim 3 is characterized in that, in the invention described in claim 2, the amount of the water absorbing member is set to an amount exceeding 6.7 weight percent with respect to the water-softening filter medium.
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the water absorbing member is disposed at a position between the ion exchange resin and the metal ion sequestering material. It is characterized by that.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the water-softening filter medium is filled in a first case, and the second case is filled in the first case. The metal ion sequestering material is accommodated in the second case, and the water absorbing member is provided in the first case outside the second case.

  According to this invention, by providing the water absorbing member between the water-softening filter medium and the metal ion sequestering material, moisture generated from the ion exchange resin is absorbed by the water absorbing member, and dissolution of the metal ion sequestering material can be prevented. For this reason, in this invention, there exists an effect that the situation where the narrow part of a water channel is obstruct | occluded by the dissolved metal ion sequestering material can be prevented beforehand.

(First embodiment)
Below, 1st Embodiment of this invention is described based on FIGS. 1-3.
As shown in FIG. 1, the outer case 11 of the water quality adjusting device of this embodiment includes a stainless steel case main body 12 having a bottomed cylindrical shape, and an upper end opening of the case main body 12 tightened via a packing 13. It is comprised from the cover body 15 made from the same stainless steel attached to the attachment band 14 so that attachment or detachment was possible.

  A cylindrical synthetic resin cartridge 16 serving as a first case is detachably accommodated in the case main body 12 of the outer case 11, and the top and bottom wall portions of the upper and lower ends of the cartridge 16 are detachably accommodated. The inner plates 16i and 16k are fixed respectively. An inlet 119 and an outlet 120 are formed in the top wall. The inner plates 16i and 16k are provided with water passage holes 16f and 16e, and filters 17 made of non-woven fabric or the like are disposed at upper and lower ends inside the cartridge 16 corresponding to the water passage holes 16f and 16e. ing.

  Directly below the upper internal plate 16i is filled with activated carbon 18, and a filter 21 made of non-woven fabric is provided downstream of the activated carbon 18. Immediately above the lower inner plate 16k is filled with granular activated carbon as the water absorbing member 20, and a filter 21 made of non-woven fabric is provided upstream thereof. The water absorbing member 20 has an average particle size of 40 to 100 mesh. A large number of ion exchange resins 19 forming a granular form as a water-softening filter medium are filled between the upper and lower filters 21. Therefore, the downstream side of the upper filter 17 is a softened filter material filling portion.

  A cylindrical container 30 as a second case is disposed on the inner bottom of the cartridge 16. A cylindrical lower pipe portion 30A projects from the center of the lower wall of the storage container 30, and the lower pipe portion 30A is connected to the cylindrical portion 16b at the center of the inner plate 16k via a connecting pipe 35. . An intermediate pipe portion 30B is formed at the center of the lower wall of the container 30 toward the upper side in the container. The intermediate pipe portion 30B communicates with the lower pipe portion 30A, and the upper end opening is close to the upper wall of the container 30. An opening 30C is formed at the center of the upper wall of the storage container 30, and an upper pipe portion 30D projects from the upper wall of the storage container 30 so as to communicate with the opening 30C. The upper pipe portion 30D is connected to the outlet 120 through a connecting pipe 34. The water absorbing member 20 is disposed between the ion exchange resin 19 and a metal ion sequestering material 33 described later.

  In the container 30, a large number of metal ion sequestering materials (sodium polyphosphate in this embodiment) 33 that are in the form of a particle or lump as large as the tip of a fingertip and in the form of a translucent glass are stored. ing.

  A water supply port 22 and a water discharge port 23 are disposed in the lid body 15 of the outer case 11, and a check valve 24 is disposed in the water supply port 22. When the lid 15 is mounted on the case body 12 in a state where the cartridge 16 is housed in the case body 12 of the outer case 11, the water supply port 22 and the water outlet 23 are connected to the cartridge 16 via the packing 13. Inlet 119 and outlet 120 are connected. A water supply hose 26 for supplying raw water such as tap water is connected to the water supply port 22 via a water stop valve 27. A discharge hose 28 for discharging softened water is connected to the water outlet 23.

  Then, raw water is supplied from the water supply hose 26 into the cartridge 16 through the water supply port 22 and the inlet 119. The raw water consists of a water passage hole 16 f of the inner plate 16 i, a filling portion of the ion exchange resin 19, a filling portion of the water absorbing member 20, a water passage hole 16 e of the lower inner plate 16 k, a lower inner plate 16 k and the bottom wall of the cartridge 16. The intermediate pipe portion 30B passes through the clearance 16j between the intermediate pipe portion 30B and the intermediate pipe portion 30B, and reaches into the storage container 30 from the upper end opening of the intermediate pipe portion 30B. Then, the water in the container 30 is sent to the outside through the opening 30 </ b> C, the connecting pipe 34, the outlet 120, the water outlet 23, and the discharge hose 28.

  For this reason, the raw water is softened by ion exchange of ions contained in the raw water by the ion exchange resin 19. Then, when the softened water flows into the storage container 30, the metal ion sequestering material 33 is eluted in the softened water, so that the mineral content is sequestered and the generation of scale is suppressed as described later. become.

  A water guide 60 is attached to the upper end of the intermediate pipe portion 30B. As shown in FIGS. 2 and 3, the water guide 60 includes a cylindrical portion 61 at the center thereof, and the cylindrical portion 61 is fitted to the upper end of the water guide 60. A plurality of protrusions 62 are formed in the cylindrical portion 61 for forming a gap through which water passes between the inner surface of the cylindrical portion 61 and the upper end of the intermediate pipe portion 30B. Guide portions 63 are formed in the cylindrical portion 61 so as to protrude in the lateral direction at equal intervals. The inside of the guide portion 63 communicates with the inside of the cylindrical portion 61, and the inner upper portion is curved in an arc shape downward. For this reason, the water discharged from the upper end of the intermediate pipe part 30B is guided downward. Then, the guided water reaches the opening 30C through the outside of the water guide.

Next, the operation of the water quality adjusting apparatus configured as described above will be described.
In this water quality adjusting device, as described above, raw water such as tap water from the water supply port 22 is captured in the cartridge 16 by ion exchange with the exchange reaction group of the ion exchange resin 19, and the raw water is softened. Watered.

  Thereafter, the softened water that has passed through the ion exchange resin 19 flows into the container 30, is discharged from the upper end opening of the intermediate pipe portion 30 </ b> B, and travels from the guide portion 63 of the water guide 60 into the metal ion sequestering material 33 below. Is ejected. For this reason, the metal ion sequestering material 33 is effectively eluted in the softened water by this ejection.

  Then, the softened water that has passed through the metal ion sequestering material 33 in the container 30 is supplied to the external piping system from the opening 30 </ b> C via the connection pipe 34, the outlet 120, the water outlet 23, and the discharge hose 28. At this time, minerals contained in the softened water, mainly calcium and magnesium, are sequestered by reacting with the metal ion sequestering material 33, and hydroxyapatite which is a kind of calcium phosphate and magnesium phosphate is generated. In this state, these products only float in the softened water and are difficult to become scale. Therefore, even if the ion exchange capacity of the ion exchange resin 19 is reduced and calcium or magnesium remains in the softened water, Can be suppressed. Moreover, since the metal ion sequestering material 33 sequesters magnesium that easily reacts with silica, formation of silica scale is suppressed.

  Therefore, if this softened water is supplied to kitchen equipment such as a steam convention oven, the scale adheres to the steam generator heat transfer surface of the steam generation section, or the scale accumulates on the water level sensor, drain pipe, etc. A fear can be suppressed and it becomes possible to operate a kitchen apparatus for a long time without trouble. Therefore, the management cost can be greatly reduced.

  Now, in the water quality adjusting device of this embodiment, the water absorbing member 20 of a predetermined amount or more is provided between the filling portion of the ion exchange resin 19 and the container 30 of the metal ion sequestering material 33. For this reason, even if water is generated in the filling portion of the ion exchange resin 19 in a state before use of the water quality adjusting device, that is, in a state such as warehouse storage, the water is absorbed by the water absorbing member 20 and the metal ion sequestering material 33 Never reach the part. For this reason, it can suppress that the metal ion sequestering material 33 is melt | dissolved, and can block | close the water passage.

Therefore, in this embodiment, the following effects are exhibited.
(1) Since the water in the ion exchange resin 19 is adsorbed by the water absorbing member 20, the metal ion sequestering material 33 can be prevented from being dissolved. For this reason, even if the water quality adjusting device is stored in a warehouse or the like for a long time, it is possible to prevent the water passage from being clogged by the metal ion sequestering material 33.

  (2) A water guide 60 is provided at the upper end opening of the intermediate pipe portion 30B, and the water guide 60 is provided with a guide portion 63 protruding in the lateral direction. And since softened water is ejected with respect to the metal ion sequestering material 33 from this guide part 63 at the time of use of a water quality adjusting device, the metal ion sequestering material 33 can be eluted effectively.

  (3) Since the guide part 63 of the water guide 60 spreads in the lateral direction, even if the metal ion sequestering material 33 is dissolved in the storage state of the water quality adjusting device, the entire guide part 63 is hardly blocked. Therefore, the flow path of the softened water can be secured. And by distribution | circulation of softening water, the metal ion sequestering material 33 which melt | dissolved and adhered to the part of the guide part 63 is eluted gradually, and an adhesion state is eliminated.

Hereinafter, examples of the embodiment will be described.
In this embodiment, as shown in FIG. 8, a container 500 for a large number of objects to be inspected comprising a bottomed cylindrical container body 501 and a transparent lid 502 that closes an end opening of the container body 501 is used. It was. The inside of the container 500 is divided into three by partition plates 503 and 505 having a large number of holes 504 and 506, respectively, and the ion exchange resin 19 is accommodated in the widest central compartment 500A, and the compartment at one end is also provided. The water absorbing member 20 made of granular activated carbon was accommodated in the chamber 500B or was not accommodated, and the metal ion sequestering material 33 was accommodated in the compartment 500C at the other end. Then, the degree of dissolution of the metal ion sequestering material 33 was visually observed through a transparent lid 502. The results appear in Tables 1 to 3.

ここで、表１〜表３に示すように、イオン交換樹脂１９の量は、１．８キログラム，０．９キログラム，０．４５キログラムの３種類である。

Here, as shown in Tables 1 to 3, the amount of the ion exchange resin 19 is three types of 1.8 kilograms, 0.9 kilograms, and 0.45 kilograms.

  Each time the amount of the ion exchange resin 19 is different, 11 types of inspected bodies having different amounts of the water absorbing member 20 are prepared. Here, the granular activated carbon constituting the water absorbing member 20 has an average particle size of 70 mesh.

  As shown in Table 1, for 1.8 kilograms of ion-curing resin, the amount of the water absorbing member 20 is 300 grams, 270 grams, 240 grams, 210 grams, 180 grams, 150 grams, 120 grams as an object to be inspected. , 90 grams, 60 grams, 30 grams, and 0 grams were prepared.

  As shown in Table 2, with respect to 0.9 kg of ion-curing resin, the amount of the water-absorbing member 20 is 200 grams, 180 grams, 160 grams, 140 grams, 120 grams, 100 grams, 80 grams as an object to be inspected. , 60 grams, 40 grams, 20 grams, and 0 grams were prepared.

  As shown in Table 3, for 0.45 kilograms of ion-curing resin, the amount of the water absorbing member 20 is 100 grams, 90 grams, 80 grams, 70 grams, 60 grams, 50 grams, 40 grams as an object to be inspected. , 30 grams, 20 grams, 10 grams, and 0 grams were prepared.

  The particle size of the ion exchange resin 19 is 0.6 millimeters. Moreover, the space | gap produced by reducing the quantity of the ion exchange resin 19 and the water absorption member 20 was filled with the glass ball with a particle size of 2 millimeters.

  The object to be inspected as described above was laid down and installed in a thermostatic chamber. Then, the thermostat was turned on every day for 8 hours from 9:00 am to 5:00 pm, and the interior of the thermostat was maintained at 35 degrees Celsius. Then, for the remaining 16 hours from 5:00 pm to 9:00 am, the thermostat was turned off and returned to the outside temperature. In this way, the humidity in the container 500 was changed. This was repeated every day, and the state of the metal ion sequestering material 33 was visually observed through the lid 502 after 10 days, 20 days, and 30 days. In Tables 1 to 3, “◯” indicates that the metal ion sequestering material 33 cannot be dissolved, and “Δ” indicates that a dissolution phenomenon is observed on the surface of the metal ion sequestering material 33, but the state is maintained. The state where the flow of the gel-like substance cannot be confirmed, “x” indicates the state where the surface of the metal ion sequestering material 33 is dissolved and the gel-like substance is confirmed to flow down.

  As a result, as is apparent from Tables 1 to 3, after 10 days, dissolution of the water-absorbing member 20 was observed in the test objects of 120 grams, 60 grams, and 30 grams or less. That is, when the water absorbing member 20 becomes 6.67 weight percent or less with respect to the ion exchange resin 19, dissolution starts.

  And 20 days later, the water-absorbing member 20 was observed to flow down in a gel-like substance in the test objects of 90 grams, 40 grams and 20 grams or less. That is, when the water absorbing member 20 becomes 5 weight percent to 4.4 weight percent or less with respect to the ion exchange resin 19, the dissolved gel substance flows down.

  Accordingly, if the water absorbing member 20 is in an amount exceeding 6.67 weight percent with respect to the ion exchange resin 19, dissolution of the metal ion sequestering material 33 can be prevented, and if the amount exceeds 5 weight percent to 4.4 weight percent. It is possible to prevent the gel material from flowing down.

  In particular, in the object to be inspected in FIG. 8, the metal ion sequestering material 33 and the water absorbing member 20 are arranged apart from each other via the ion exchange resin 19. Therefore, if the water absorbing member 20 is disposed between the ion exchange resin 19 and the metal ion sequestering material 33 as in the above embodiment, dissolution of the metal ion sequestering material 33 can be prevented more reliably.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the second embodiment, as shown in FIGS. 4 and 5, a guard member 65 is fixed to the outer periphery of the intermediate pipe portion 30 </ b> B immediately below the water guide 60. The guard member 65 is for guarding the granular ion exchange resin 19 from entering the water guide 60. The guard member 65 prevents the ion exchange resin 19 from moving in the direction of the water guide 60, but does not obstruct the flow of water, for example, a spoke shape or a net as shown in FIGS. Shape etc. are implemented. In FIG. 4, for the sake of easy understanding, the number of spokes is reduced, but in reality, the spokes are formed more densely than in the illustrated state.

Therefore, the second embodiment has the following effects in addition to the effects of the first embodiment.
(4) Since the guard member 65 prevents the upper end opening of the intermediate pipe portion 30B from being blocked by the ion exchange resin 19, the passage clogging can be avoided more reliably.

(Third embodiment)
Next, a third embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the second embodiment, as shown in FIG. 6, the water absorbing member 20 is not provided in an accumulated state at the lower end portion of the cartridge 16, but is almost uniformly mixed between the particles of the ion exchange resin 19. .

Therefore, the third embodiment has the following effects.
(5) The structure for providing the water absorbing member 20 in an integrated state is unnecessary, and the structure of the water quality adjusting device can be simplified.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the fourth embodiment, as shown in FIG. 7, an opening 36 is formed in the lower portion of the peripheral wall of the storage container 30, and a cylindrical water absorbing member 40 is provided so as to close the opening 36. The water absorbing member 40 is made of fibrous activated carbon having a nonwoven fabric shape.

Around the water absorbing member 40, the water absorbing member 20 is disposed in a region partitioned by the filter 21 as in the first embodiment.
Further, the lower end of the container 30 is opened, and the intermediate pipe portion 30B is connected to the upper pipe portion 30D.

  And in this 4th Embodiment, the softened water ion-exchanged in the ion exchange resin 19 arrives in the storage container 30 of the metal ion sequestering material 33 through the filling part of the water absorption member 20, the water absorption member 40, and the metal ion The sealing material 33 is dissolved. The softened water eluted from the metal ion sequestering material 33 is supplied to the outside from the outlet 120 through the filter 17, the water passage hole 16 e and the gap 16 j from the lower end opening of the container 30, through the intermediate pipe portion 30 </ b> B and the connecting pipe 34. The

Therefore, the fourth embodiment has the following effects.
(6) Since a part of the storage container 30 constitutes the water absorbing member 40, the filling amount of the ion exchange resin 19 can be increased.

(Modification)
The present invention is not limited to the configuration of the embodiment, and may be embodied as follows.

-The water absorbing member 20 is made of a material different from that of the above embodiment, for example, rigid zeolite, silica gel or the like.
In each of the above embodiments, fibrous activated carbon is used as the filters 17 and 21, and the filters 17 and 21 are also given a water absorption function.

Sectional drawing which shows the water quality adjusting device of 1st Embodiment. The bottom view which shows a water guide. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. The partial cross section figure which shows the water quality adjusting device of 2nd Embodiment. Similarly a partial cross-sectional view. Sectional drawing which shows the water quality adjusting device of 2nd Embodiment. Sectional drawing which shows the water quality adjusting device of 3rd Embodiment. Sectional drawing which shows the to-be-inspected object of an Example. Sectional drawing which shows a conventional structure.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Storage case, 16 ... Cartridge, 19 ... Ion exchange resin, 20 ... Water absorption member, 33 ... Metal ion sequestering material, 40 ... Water absorption member.

Claims (5)

A metal ion sequestering material is provided on the downstream side of the water softening filter material filling portion filled with a water softening filter material made of ion exchange resin, so that the raw water is softened by the water softening filter material and the metal ion sequestering material is eluted in the softened water. In the water quality adjustment device configured in
A water quality adjusting device comprising a water absorbing member. A water quality adjusting device, wherein the water absorbing member is composed of granular activated carbon having an average particle size of 40 to 100 mesh, and the amount of the water absorbing member is an amount exceeding 5.0 weight percent with respect to the water-softening filter medium. The water quality adjusting device according to claim 2, wherein the amount of the water absorbing member is set to an amount exceeding 6.7% by weight with respect to the water-softening filter medium. The said water absorption member is arrange | positioned in the position between ion-exchange resin and a metal ion sequestering material, The water quality adjustment apparatus as described in any one of Claims 1-3 characterized by the above-mentioned. The water softening filter medium is filled in the first case, the second case is provided in the first case, the metal ion sequestering material is accommodated in the second case, and the water absorbing member is disposed outside the second case. It provided in the 1st case, The water quality adjustment apparatus as described in any one of Claims 1-4 characterized by the above-mentioned.

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