JP2013150974A - Purifying element, water purifier equipped with the same, and method for manufacturing the purifying element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a purifying element that exhibits a specified filtration flow rate or more from the beginning of flow, a water purifier equipped with the purifying element, and a method for manufacturing the purifying element.SOLUTION: Carbon dioxide gas adsorption treatment is carried out by allowing carbon dioxide gas to flow from a water inflow part 11 toward a water outflow part 12 or in a reverse direction to adsorb carbon dioxide gas by a purifying material 19 in the flowing state of the carbon dioxide gas, and sealing treatment with a gas impermeable material is carried out after the carbon dioxide gas adsorption treatment.

Description

  The present invention includes a purifying material filling layer between a water inflow portion into which water flows in and a water outflow portion from which the water flows out, and receives the water to be purified from the water inflow portion to receive the purification material. It is related with the purification element which distribute | circulates the said packed bed, and flows out the water purified with the said purification material from the said water outflow part, the water purifier provided with the same, and the manufacturing method of a purification element.

2. Description of the Related Art Conventionally, as shown in Patent Document 1, a purification element that purifies water includes a purifier packed layer between a water inflow portion into which water flows in and a water outflow portion from which the water flows out. The water to be purified is received from the inflow portion, and the packed bed of the purifying material is circulated so that the water purified by the purifying material flows out from the water outflow portion.
Since the purification material of such a purification element contains air before use and the air does not easily dissolve in the water to be purified, when the water flows through the purification material, the air impedes the circulation. There are things to do. In other words, the purification element is in a state in which it is difficult for water to pass through in the initial stage of distribution, and a sufficient filtration flow rate may not be obtained.
Therefore, in the technology disclosed in Patent Document 1, the purification element before use is sealed inside a gas-impermeable material filled with carbon dioxide gas that is easily dissolved in water, and carbon dioxide gas is added to the purification material of the purification element. Included. Thus, in the purification element, when water is circulated to the purification material, the carbon dioxide gas contained in the purification material is dissolved in the water, thereby improving the water passing performance of the water purification material, Opportunities have increased and sufficient purification performance has been obtained from the beginning.

JP 2010-162492 A

  In the technique disclosed in Patent Document 1, the purification element is merely enclosed in a gas-impermeable material filled with carbon dioxide gas. With regard to such a treatment mode, there was room for improvement when considering the purification performance at the initial stage of distribution.

  The present invention has been made in view of the above-described problems, and its object is to provide a filtration flow rate that is a certain level or higher from the beginning of distribution (here, the filtration flow rate is an index related to purification performance, and the larger this flow rate, The present invention is to provide a purification element that exhibits high performance), a water purifier equipped with the purification element, and a method for producing the purification element.

In order to achieve the above object, the purification element of the present invention comprises:
Between the water inflow part into which water flows in and the water outflow part from which the water flows out, a purifying layer is provided, and the purifying layer receives the water to be purified from the water inflow unit. Is a purification element that flows out the water purified by the purification material from the water outflow portion.
Carbon dioxide gas is circulated in the direction from the water inflow portion to the water outflow portion or in the opposite direction to the direction, and the carbon dioxide gas is adsorbed on the purification material in the flow state of the pretreatment gas. As the adsorption process is executed,
After the carbon dioxide adsorption treatment, it is sealed with a gas impermeable material.

According to the above characteristic configuration, carbon dioxide gas is circulated through the purification material of the purification element by the carbon dioxide adsorption treatment, and the carbon dioxide gas is adsorbed in the circulation state of the carbon dioxide gas. The interior space can be fully extended. Thereby, carbon dioxide gas can fully be made to adsorb | suck to a purification material.
And, the carbon dioxide gas adsorbed on the purification material is desorbed from the purification material by sealing the purification element that sufficiently adsorbs the carbon dioxide gas with the purification material in this way with a gas impermeable material. Can be prevented. Thereby, until the user takes out the purification element from the gas-impermeable material so as to use the purification element, the adsorption state of the carbon dioxide gas on the purification material can be maintained.
The carbon dioxide gas adsorbed on the purification material does not immediately desorb from the purification material even after being taken out from the gas-impermeable material. Even when the material is taken out from the material and attached to the water purifier, the purification material adsorbs carbon dioxide. Thus, when water is circulated through the purification element, the water can circulate the purification material while dissolving the carbon dioxide gas inside the purification material. As a result, it is possible to realize a purification element that exhibits good filtration performance from the beginning of water distribution.
The carbon dioxide gas according to the present invention means a gas having a carbon dioxide gas content of 95% or more.

Further features of the purification element of the present invention are as follows:
Q ₀ is the carbon dioxide adsorbed by the purification material before the carbon dioxide adsorption treatment, and Q _max is the maximum amount of carbon dioxide gas adsorbed by the purification material by the flow of carbon dioxide gas,
In the carbon dioxide adsorption treatment, 50% or more of carbon dioxide of Q _max −Q ₀ is adsorbed.

According to the above characteristic configuration, in the carbon dioxide adsorption process, by adsorbing carbon dioxide gas of 50% or more of Q _max −Q ₀ to the purification material of the purification element, the filtration flow rate is set to a certain level or more in the initial stage of distribution. Can keep.
In the case where part of the carbon dioxide gas is desorbed from the purification material between the time when the carbon dioxide adsorption treatment is executed and the time when the sealing treatment is executed or until the purification material is set in the water purifier. There is.
The “maximum adsorption amount Q _max of carbon dioxide gas adsorbed by the purifier by the circulation of carbon dioxide gas” in the above characteristic configuration is the adsorption amount in the circulation state of carbon dioxide gas, and the circulation is stopped for a certain time in the air. It means the amount of adsorption when left standing (for example, about several tens of seconds).

Further features of the purification element of the present invention are as follows:
In the carbon dioxide adsorption treatment, the carbon dioxide gas is adsorbed to Q _max that is the maximum adsorption amount of the carbon dioxide gas adsorbed by the purification material.

  According to the above characteristic configuration, the carbon dioxide gas is adsorbed to the maximum amount of adsorption on the purification material, so that the carbon dioxide gas is adsorbed over almost the entire area of the purification material, and the water to be purified is introduced from the initial stage of distribution. It is possible to allow water to pass through almost the entire area of the purification material.

Further features of the purification element of the present invention are as follows:
A purification cartridge for forming the filling layer of the purification material therein;
A purification cartridge cover that is attached to the water outflow portion side of the purification cartridge and regulates the flow of water after purification;
The carbon dioxide adsorption process is executed by forcibly circulating the carbon dioxide gas from the water inflow portion toward the water outflow portion in a state where the purification cartridge cover is attached to the purification cartridge. In the point.
In the above configuration, the restriction of the flow of water after purification by the purification cartridge cover is realized by an opening having an opening area smaller than the area of the entire cover provided in the cover.

  According to the above characteristic configuration, since the carbon dioxide adsorption process is performed with the purification cartridge cover for restricting the circulation attached to the purification cartridge, the carbon dioxide gas is adsorbed to the purification material in a pressurized state. Will be. Thereby, the adsorption | suction efficiency of the carbon dioxide gas to a purification material can be improved, for example, adsorption processing time can be shortened. Further, in the sealing process, by using carbon dioxide gas as the gas to be sealed, it is possible to more completely prevent the carbon dioxide gas adsorbed on the purification material from being desorbed from the purification material.

The characteristic structure of the water purifier for achieving the above object is that the water purifier includes the above-described purification element.
Examples of the water purifier include a pot type water purifier and a water supply type water purifier.

A pot-type water purifier is usually equipped with a raw water container for storing water before purification, a purification element, and a water purification container for storing water after purification from the top in the vertical direction, and the water stored in the raw water container. Circulates the purification element by its own weight without being pressurized from the outside. That is, the purification element applied to the pot type water purifier needs to be able to circulate water at a relatively low pressure.
According to the purification element of the present invention that has been described so far, the carbon dioxide gas is sufficiently adsorbed to the purification material, and water can easily flow even at a relatively low pressure. It can be applied well to the vessel.

  The purification elements described so far can be suitably used in water supply type water purifiers such as faucet direct-coupled water purifiers, countertop water purifiers, faucet integrated water purifiers, and undersink water purifiers. is there.

A method for producing a purification element for achieving the above object is as follows:
Between the water inflow part into which water flows in and the water outflow part from which the water flows out, a purifying layer is provided, and the purifying layer receives the water to be purified from the water inflow unit. In which the water purified by the purification material flows out from the water outflow portion, and the characteristic configuration is
A carbon dioxide adsorption process in which carbon dioxide gas is circulated in the direction from the water inflow portion to the water outflow portion or in the direction opposite to the direction, and the carbon dioxide gas is adsorbed to the purification material in a carbon dioxide gas circulation state. Process,
After the carbon dioxide adsorption treatment step, a sealing treatment step is performed in which the purification element is sealed with a gas-impermeable material.

According to the above characteristic configuration, since the carbon dioxide gas is circulated through the purification material of the purification element and the carbon dioxide gas is adsorbed in the circulation state of the carbon dioxide gas by the carbon dioxide adsorption treatment step, the carbon dioxide gas is absorbed into the purification material. You can get enough inside. Thereby, carbon dioxide gas can fully be made to adsorb | suck to a purification material.
Then, in the sealing treatment step after the carbon dioxide adsorption treatment step, the purification element that has sufficiently adsorbed carbon dioxide gas with the purification material is sealed with a gas-impermeable material, and the carbon dioxide gas adsorbed on the purification material However, it can prevent detachment from the purification material. In the sealing process, by using carbon dioxide gas as the gas to be sealed, the carbon dioxide gas adsorbed on the purification material can be more completely prevented from being desorbed from the purification material. Thereby, until the user takes out the purification element from the gas-impermeable material so as to use the purification element, the adsorption state of the carbon dioxide gas on the purification material can be maintained.

The partial cross section figure which shows the purification cartridge of the state where the purification cartridge cover and the like are installed. The graph which shows the change of the carbon dioxide gas adsorption amount to the purification | cleaning material with respect to a carbon dioxide gas circulation amount. The graph which shows the relationship between the adsorption amount of the carbon dioxide gas of the filter medium A, and the filtration flow rate. The graph which shows the change of the pressure loss in the purification | cleaning material in the case where it is not made to adsorb | suck carbon dioxide gas. Graph showing the relationship between the amount of carbon dioxide gas adsorbed and the filtration flow rate due to the difference in filter media The graph which shows the change of the adsorption amount of the carbon dioxide gas from a purification material with respect to the elapsed time after bag opening. Sectional drawing of the pot type water purifier equipped with the purification element.

The present application is directed to a purification element 100 that purifies water to be purified, a water purifier that can be equipped with the purification element 100, and a method for manufacturing the purification element 100. The purification element 100 of the present invention is characterized in that it exhibits a filtration flow rate that is greater than or equal to a predetermined level from the beginning of distribution, which is the time when the water to be purified is first distributed to the purification element 100.
In the following, first, the purification element 100 will be described, the manufacturing method of the purification element 100 will be described, and then the water purifier to which the purification element 100 can be attached will be described.

[Purification element]
The purification element 100 of the present invention has a purification cartridge 60 that forms therein a packed layer 20 of a filter medium 19 (an example of a purification material) such as activated carbon. Examples of the filter medium 19 include granular activated carbon, fibrous activated carbon, activated carbon such as molded activated carbon, and a mixture of granular activated carbon and zeolite. In the following description, unless otherwise specified, the filter medium 19 is a filter medium A (a mixed product of 83 parts by mass of granular activated carbon obtained by carbonization activation of coconut shells and 17 parts by mass of zeolite, and a particle size analysis method defined in JIS-K1474) In which the mass fraction between 250 μm and 106 μm is 90% or more and the packing density according to the JIS is 0.54 g / mL). The specific surface area (by the BET method) of the filter medium 19 is 1040 m ² / g.
As shown in FIG. 1, the purification cartridge 60 is provided with one end member 21 having a water inflow portion 11 capable of flowing water at one end, and a bottom member 25 for closing the other end. It is comprised by the substantially cylindrical shape which uses the material 25 as both ends.
In a substantially cylindrical portion between the one end member 21 and the bottom member 25, the outer filter 13 that supports the filter medium 19 (an example of a purification material) from the radially outer side in order from the outer side in the radial direction, the filter medium that purifies water. 19, an inner filter 15 that supports the filter medium 19 from the radially inner side, and a central flow path 14 through which water can freely flow are provided.
The water inflow portion 11 of the one end member 21 includes a first water inflow portion 11a that guides the water to be purified to the filter medium 19 in the axial direction of the purification element 100 (the direction along the arrow X in FIG. 1), and the central flow path 14. It is comprised from the 2nd water inflow site | part 11b led to. In addition, the inflow side filter 17 is provided in the 1st water inflow site | part 11a, and it prevents that the filter medium 19 flows out from the 1st water inflow site | part 11a.
That is, the inflow filter 17, the outer filter 13, the inner filter 15, and the bottom member 25 form a packed layer 20 that fills the filter medium 19 inside.

With the above configuration, a part of the water to be purified passes through the filter medium 19 in the axial direction of the purification element 100 via the first water inflow portion 11a, and then passes to the outside of the purification element 100 via the outer filter 13. Led.
The remainder of the water to be purified is guided to the central flow path 14 via the second water inflow portion 11b, and then circulated through the filter medium 19 via the inner filter 15 in the radial direction of the purification element 100. It is guided to the outside of the purification element 100 through the filter 13.
That is, a portion of the packed bed 20 where the outer filter 13 is provided becomes the water outflow portion 12 through which water flows out. And the water which flowed out from the water outflow part 12 is supplied as purified water.

In the present invention, as shown in FIG. 1, a purification cartridge cover 61 that is attached to the water outflow portion 12 side of the purification cartridge 60 and regulates the flow of water after purification is provided.
In other words, as shown in FIG. 1, the purification cartridge cover 61 has a bottomed cylindrical shape having an opening 61a at one end and a bottom 61b at the other end. As shown in FIG. 1, the purification cartridge cover 61 has an opening 61a in the direction along the central axis of the purification cartridge 60 (the direction along the arrow X in FIG. 1) when the purification cartridge 60 is mounted. The purification cartridge 60 is surrounded with the bottom 61b disposed on the bottom member 25 side of the purification cartridge 60 while being disposed on the one end member 21 side of the purification cartridge 60.
In the side surface portion 61c of the purification cartridge cover 61, a plurality of slits 61d are provided at equal intervals in the direction along the side surface from the bottom portion 61b to the opening portion 61a in the vicinity of the bottom portion 61b.

[Production method of purification element]
The purification element 100 of the present invention includes a carbon dioxide treatment step shown below and a hermetic seal in order to distribute water well and exhibit high filtration performance from the beginning of distribution, which is the time when the water to be purified is first distributed. It is manufactured by a manufacturing method having a processing step.
[CO2 treatment process]
In the carbon dioxide treatment step, as shown in FIG. 1, carbon dioxide gas is supplied to the one end member 21 of the purification cartridge 60 via the connection adapter 23 in a state where the purification cartridge cover 61 is attached to the purification cartridge 60. The hose 22 to be supplied is connected in an airtight state.
The supplied carbon dioxide gas may have a concentration of 95% or more in some cases.
In this state, the carbon dioxide gas is circulated from the water inflow portion 11 toward the water outflow portion 12 by pumping the carbon dioxide gas to the purification cartridge 60 with the hose 22. Adsorb carbon dioxide gas.

At this time, since the purification cartridge cover 61 is attached to the purification cartridge 60, the carbon dioxide gas after flowing through the filter medium 19 of the purification cartridge 60 passes through the slit 61 d of the purification cartridge cover 61 and the purification cartridge cover 61. To the outside.
Here, the area of the slit 61d is set to about 1.2% to 11% with respect to the outer area of the purification cartridge cover 61, that is, the total area which is the sum of the areas of the bottom portion 61b and the side surface portion 61c. Thus, it is possible to increase the adsorption pressure for adsorbing the carbon dioxide gas on the filter medium 19 and improve the adsorption efficiency.

[Effect of carbon dioxide gas adsorption]
The above-described filter media A having different carbon dioxide gas adsorption amounts were prepared, and the filtration flow rate at the initial distribution was measured for each of the filter media A having different carbon dioxide gas adsorption amounts.

The adsorption method of the carbon dioxide gas to the filter medium A is performed by filling the filter medium A into a 65 ml test container and circulating the carbon dioxide gas through the test container at room temperature to change the circulation amount of the carbon dioxide gas. Filter media A having different carbon dioxide gas adsorption amounts were prepared. The amount of carbon dioxide gas adsorbed on the filter medium A was calculated by measuring the mass increase of the filter medium A. Further, the filtration flow rate measurement method is based on the batch test method of JIS S3201. The measurement results are shown in Table 1 and FIG.
Incidentally, the change of the carbon dioxide gas adsorption amount to the filter medium A with respect to the carbon dioxide gas circulation amount is as shown in the graph of FIG. FIG. 2 shows that the carbon dioxide gas adsorption amount becomes the saturated adsorption amount when 20 L of carbon dioxide gas is flowed in the measurement.

  Table 1 shows the results of measuring the filtration flow rate when the adsorption amount of carbon dioxide gas was changed, and the pH of water after flowing through the filter medium.

In the graph of FIG. 3, the measurement result (1L: corresponding to the result shown in Table 1) when 1 L of water is passed from a state where no water is passed, and after 1 L of water has passed. Furthermore, the measurement result (2L eyes) when 1 L is allowed to flow is shown.
As can be seen from the graph, it can be seen from both the 1L measurement result and the 2L measurement result that the higher the amount of carbon dioxide gas adsorbed, the greater the filtration flow rate.
Here, the carbon dioxide adsorbed by the filter medium A before the carbon dioxide adsorption treatment is defined as QA ₀ (≈0.000 g), and the maximum adsorption amount of the carbon dioxide gas adsorbed by the filter medium A through the circulation of the carbon dioxide gas is QA _max. In the case of the filter medium A, the carbon dioxide adsorption amount of 35% or more of QA _max -QA ₀ (0.02 g / g), preferably 50% or more of carbon dioxide adsorption amount (0.029 g / g) is good. It can be seen that a high filtration flow rate (0.2 L / min: target flow rate at the beginning of flow) can be exhibited.
Here, after performing the carbon dioxide adsorption process, a part of the carbon dioxide gas may be desorbed from the purification material. For this reason, the “maximum adsorption amount Q _max of carbon dioxide gas adsorbed by the purifier by the circulation of carbon dioxide gas” is the adsorption amount in the circulation state of carbon dioxide gas, and the circulation is stopped for a certain time ( For example, it means the amount of adsorption when left standing.
Usually, the amount of adsorption when the flow is stopped and left in the air for a certain time (for example, about several tens of seconds) is lower by about 0.005 g / g than the amount of adsorption immediately after the flow is stopped. Value.

  Moreover, as shown in Table 1, since the pH of the purified water after passing through the filter medium 19 with a larger amount of carbon dioxide gas adsorption is lower, the carbon dioxide gas adsorbed on the filter medium 19 is It can be seen that it is dissolved in the circulating water.

A test for measuring a change in pressure loss at the initial stage of distribution was performed for each of the filter medium 19 that adsorbs carbon dioxide gas and the filter medium 19 that does not adsorb carbon dioxide gas.
As test conditions, the filter medium 19 was dried at 110 ° C. for 16 hours and then allowed to cool in a desiccator. This was filled into a container having a volume of 57 mL and a diameter of 50 mm.
A filter medium 19 through which carbon dioxide gas was circulated for several minutes and a filter medium 19 through which carbon dioxide gas was not circulated were prepared, and tap water at 20 ° C. was passed at a filtration flow rate of 1.0 ± 0.05 L / min.
The test results are shown in FIG.
As shown in FIG. 4, when 0.2 L water is passed (after 10 seconds), in the filter medium 19 in which the carbon dioxide gas is circulated for several minutes, the pressure loss is reduced to 28 kPa, whereas the carbon dioxide gas is reduced. In the filter medium 19 not to be circulated, the value was as high as 57 kPa.
Furthermore, when the water flowed 0.5L (after 30 seconds), the pressure loss was stable at 20 kPa in the filter medium 19 through which carbon dioxide gas was circulated for several minutes, whereas 49 kPa was obtained in the filter medium 19 through which carbon dioxide gas was not circulated. It was a high value.
Thus, it can be seen that the carbon dioxide adsorption treatment can greatly relieve pressure loss at the beginning of distribution.

[Comparative Example]
By the method of putting the purification cartridge 60 inside the gas-impermeable material filled with carbon dioxide gas, it was examined by a test how much carbon dioxide gas was adsorbed on the filter medium 19.
In the test, the test was performed with the internal volume of the gas-impermeable material set to about 16 times (1 L) and about 32 times (2 L) the capacity of the purification cartridge, and the standing time was set to 48 hours. The test results are shown in Table 2.

As shown in Table 2, even when the filter medium 19 was allowed to stand in a carbon dioxide gas atmosphere for 48 hours, only 0.016 g / g was adsorbed with a capacity of 1 L (Comparative Example 1). Even with the capacity, only 0.018 g / g is adsorbed (Comparative Example 2).
From the above, it can be seen that, unlike the present invention, a large amount of carbon dioxide gas is not adsorbed simply by allowing the filter medium 19 to stand in a carbon dioxide gas atmosphere. Therefore, it is considered that just by putting the filter medium 19 in the gas-impermeable material and enclosing the carbon dioxide gas, the adsorption amount of the carbon dioxide gas is small, and it is difficult to exhibit a good filtration flow rate from the beginning of distribution.

[Filter media]
The present invention is applicable to various filter media having different specific surface areas that are generally used in water purifiers. That is, the specific surface area of the filter medium 19, 500~2000m ² / g approximately, preferably applied to a filter medium having a specific surface area of 800~1600m ² / g.
Here, the amount of carbon dioxide gas adsorbed on the filter medium 19 per unit mass (g) varies depending on the type and specific surface area (activation degree) of the filter medium 19. Therefore, a test for examining the amount of carbon dioxide gas adsorbed was performed using three types of filter media 19 having different specific surface areas that are generally used for the purification element 100.

  The test conditions and method were the same as the method for adsorbing carbon dioxide gas to the filter medium A described above. The test results are shown in FIG.

[Filter medium A]
The filter medium A having a specific surface area of 1040 m ² / g as a filter medium 19 (mixed product of 83 parts by mass of granular activated carbon obtained by carbonization activation of coconut shells and 17 parts by mass of zeolite, 250 μm to 106 μm in the particle size analysis method defined in JIS-K1474 5), the maximum adsorption of the carbon dioxide gas of the filter medium 19 per unit mass (g) as shown in FIG. The amount was 0.057 g / g.
[Filtering medium B]
1530 m ² / g filter medium B having a larger specific surface area than filter medium A of Example 1 as filter medium 19 (particulate activated carbon obtained by carbonizing coconut shells, and having a mass content between 250 μm and 106 μm in the particle size analysis method defined in JIS-K1474 When the rate is 90% or more and the packing density according to JIS is 0.43 g / mL), the maximum adsorption amount of carbon dioxide gas per unit mass (g) is 0.078 g / mL as shown in FIG. g.
[Filter medium C]
860 m ² / g filter medium C having a specific surface area smaller than that of filter medium A of Example 1 as filter medium 19 (mass fraction between 250 μm and 106 μm in a granular activated carbon activated by carbonization of coconut shells in the particle size analysis method defined in JIS-K1474 When the rate is 90% or more and the packing density according to JIS is 0.54 g / mL), the maximum adsorption amount of carbon dioxide gas per unit mass (g) is 0.058 g / mL, as shown in FIG. g.

From FIG. 5, according to the present invention, even in the filter media B and C having different filter media types and specific surface areas from the filter media A, even if the carbon dioxide gas adsorption amount is not the maximum adsorption amount QB _max or QC _max , QB _max If 35% or more, preferably 50% or more of -QB ₀ , QC _max -QC ₀ are adsorbed, the filtration flow rate (0.2 L / min: target flow rate at the beginning of distribution) will be satisfactorily exhibited from the beginning of distribution. be able to.
That is, in any of the filter media A, B, and C applied to the present invention, in the carbon dioxide adsorption treatment, 35% or more, preferably 50% or more of Q _max −Q ₀ is adsorbed, thereby allowing circulation. A good filtration flow rate (0.2 L / min: target flow rate at the beginning of distribution) can be exhibited from the beginning.

[Sealing process]
The purification cartridge 60 is subjected to a resin material (preferably aluminum deposition) such as polyethylene or polyamide in a state where the carbon dioxide gas is sufficiently adsorbed by the filter medium 19 after the above-described carbon dioxide treatment step is performed. A gas impermeable material (not shown) made of a resin film or the like is hermetically sealed together with carbon dioxide gas. This prevents the carbon dioxide gas adsorbed on the filter medium 19 from being desorbed.
At this time, the purification cartridge 60 is preferably sealed in a state in which the purification cartridge cover 61 is mounted from the viewpoint of maintaining the adsorption state of the carbon dioxide gas to the filter medium 19.
Hereinafter, the effect of maintaining the carbon dioxide gas adsorption state on the filter medium 19 by the purification cartridge cover 61 will be described based on the test results of FIG.

FIG. 6 shows a purification cartridge 60 that has been subjected to carbon dioxide adsorption treatment and sealing treatment, the purification cartridge 60 without the purification cartridge cover 61, the purification cartridge 60 with the purification cartridge cover 61 having an opening ratio of 11%, and the opening ratio of 1. .2 is a graph showing the relationship between the elapsed time from the time when each of the purification cartridges 60 equipped with the 2% purification cartridge cover 61 is taken out from the gas-impermeable material and the amount of carbon dioxide gas adsorbed on the filter medium 19. .
From FIG. 6, it can be seen that the carbon dioxide gas adsorbed state can be maintained longer when the purification cartridge cover 61 is attached than when the purification cartridge cover 61 is not attached. Furthermore, it can be seen that the smaller the opening ratio of the purification cartridge 60 to be attached, the longer the carbon dioxide gas adsorption state can be maintained.

[Pot type water purifier]
As shown in FIG. 7, the purification cartridge 60 of the present invention is configured to be attachable to a pot type water purifier 200. The pot-type water purifier 200 is provided with a raw water container 201 capable of storing water to be purified and a water purification container 202 capable of storing purified water after purification, and a purification cartridge 60 is mounted. In the state, the raw water container 201, the purification cartridge 60, and the water purification container 202 are arranged in the description order from the upper side to the lower side in the vertical direction.
The purification cartridge 60 is mounted with the water inflow portion 11 directed toward the raw water container 201 and the water outflow portion 12 directed toward the water purification container 202.

[Another embodiment]
(1) The purification cartridge 60 of the present invention can also be attached to a water supply type water purifier.
When the purification cartridge 60 of the present invention is used in a water supply type water purifier, it may be circulated from the water inflow path 11 to the water outflow path 12 of the purification cartridge 60 like a pot type water purifier, or the water flow of the purification cartridge 60 You may distribute | circulate from the exit path 12 to the water inflow path 11. FIG.

(2) In the above embodiment and another embodiment, when the purification element 100 is attached to the pot type water purifier 200 or the water supply type water purifier, the purification cartridge cover 61 is removed from the purification cartridge 60 of the purification element 100, and the purification cartridge 60 Only the example of wearing is shown.
However, the purification cartridge 60 may be attached to the water purifier with the purification cartridge cover 61 attached.

(3) In the above embodiment, the carbon dioxide gas is circulated in the state where the purification cartridge cover 61 is attached to the purification cartridge 60 when the carbon dioxide adsorption process is executed. However, the carbon dioxide adsorption process can also be executed with the purification cartridge cover 61 shown in FIG.

  The purification element of the present invention, the water purifier provided with the purification element, and the purification element manufacturing method include a purification element that exhibits a filtration flow of a certain level or more from the beginning of distribution, a water purifier provided with the purification element, and a purification element manufacturing method. It can be used effectively.

DESCRIPTION OF SYMBOLS 11: Water inflow part 12: Water outflow part 16: Central flow path 18: Water outflow part 19: Filter medium 20: Packing layer 60: Purification cartridge 61: Purification cartridge cover 100: Purification element 200: Pot type water purifier

Claims (6)

Between the water inflow part into which water flows in and the water outflow part from which the water flows out, a purifying layer is provided, and the purifying layer receives the water to be purified from the water inflow unit. Is a purification element for flowing out water purified from the purification material from the water outflow part,
Carbon dioxide gas is circulated in the direction from the water inflow portion to the water outflow portion or in the opposite direction to the direction, and the carbon dioxide gas is adsorbed to the purification material in the circulation state of the carbon dioxide gas. As the adsorption process is executed,
A purification element that is sealed with a gas-impermeable material after the carbon dioxide adsorption treatment. Q ₀ is the carbon dioxide adsorbed by the purification material before the carbon dioxide adsorption treatment, and Q _max is the maximum amount of carbon dioxide gas adsorbed by the purification material by the flow of carbon dioxide gas,
The purification element according to claim 1, wherein in the carbon dioxide adsorption treatment, 50% or more of carbon dioxide of Q _max -Q ₀ is adsorbed. 2. The purification element according to claim 1, wherein in the carbon dioxide adsorption treatment, the purification element is adsorbed to Q _max that is the maximum adsorption amount of carbon dioxide gas adsorbed by the purification material by circulation of the carbon dioxide gas. A purification cartridge for forming the filling layer of the purification material therein;
A purification cartridge cover that is attached to the water outflow portion side of the purification cartridge and regulates the flow of water after purification;
2. The carbon dioxide adsorption process is performed by circulating the carbon dioxide gas from the water inflow portion toward the water outflow portion in a state where the purification cartridge cover is attached to the purification cartridge. The purification element as described in any one of thru | or 3.   The water purifier provided with the purification element as described in any one of Claims 1 thru | or 4. Between the water inflow part into which water flows in and the water outflow part from which the water flows out, a purifying layer is provided, and the purifying layer receives the water to be purified from the water inflow unit. In which the water purified by the purification material flows out from the water outflow part,
A carbon dioxide adsorption process in which carbon dioxide gas is circulated in the direction from the water inflow portion to the water outflow portion or in the direction opposite to the direction, and the carbon dioxide gas is adsorbed to the purification material in a carbon dioxide gas circulation state. Process,
A purification element manufacturing method that performs a sealing treatment step of sealing the purification element with a gas-impermeable material after the carbon dioxide adsorption treatment step.

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