U.S. patent application number 13/939498 was filed with the patent office on 2013-11-14 for spiral wound type filter cartridge.
This patent application is currently assigned to COWAY CO., LTD.. The applicant listed for this patent is COWAY CO., LTD.. Invention is credited to Hyoung-Jun AHN, Doo-Won HAN, Youn-Kook KIM, Suk-Young LEE, Sun-Yong LEE, Eu-Jean MOON.
Application Number | 20130299410 13/939498 |
Document ID | / |
Family ID | 41318868 |
Filed Date | 2013-11-14 |
United States Patent
Application |
20130299410 |
Kind Code |
A1 |
LEE; Sun-Yong ; et
al. |
November 14, 2013 |
SPIRAL WOUND TYPE FILTER CARTRIDGE
Abstract
Disclosed herein is a spiral wound type filter cartridge and
more specifically, a spiral wound type filter cartridge in which
activated carbon fiber is provided. The inside of spiral wound type
filter cartridge is capable of serving as a carbon filter in a
water purifier, thus eliminating the necessity of the use of any
carbon filter for pre- or post-treatment in the process of
purifying raw water, reducing an overall size of the water purifier
and considerably reducing costs associated therewith.
Inventors: |
LEE; Sun-Yong; (Seoul,
KR) ; HAN; Doo-Won; (Seoul, KR) ; KIM;
Youn-Kook; (Seoul, KR) ; AHN; Hyoung-Jun;
(Seoul, KR) ; MOON; Eu-Jean; (Seoul, KR) ;
LEE; Suk-Young; (Seoul, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
COWAY CO., LTD. |
Kongju-si |
|
KR |
|
|
Assignee: |
COWAY CO., LTD.
Kongju-si
KR
|
Family ID: |
41318868 |
Appl. No.: |
13/939498 |
Filed: |
July 11, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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12991840 |
Nov 9, 2010 |
8506807 |
|
|
PCT/KR2008/007513 |
Dec 18, 2008 |
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13939498 |
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Current U.S.
Class: |
210/266 ;
210/295 |
Current CPC
Class: |
B01D 2311/2626 20130101;
B01D 2313/40 20130101; B01D 63/10 20130101; B01D 2313/14 20130101;
B01D 63/103 20130101; B01D 2325/48 20130101; C02F 1/004
20130101 |
Class at
Publication: |
210/266 ;
210/295 |
International
Class: |
C02F 1/00 20060101
C02F001/00 |
Foreign Application Data
Date |
Code |
Application Number |
May 15, 2008 |
KR |
10-2008-0045015 |
Claims
1. A spiral wound type filter cartridge comprising: a filter tube
provided with a purified-water outlet on one side thereof, the
filter tube provided with a plurality of purified-water inlet holes
in a longitudinal direction on the outside thereof, the filter tube
being in the form of a pipe; a filtering sheet comprising a
membrane sheet composed of a two-fold sheet to provide a filter
area therein and provided with a mesh sheet for membrane, and a
mesh sheet provided with a channel and laminated on one or both
surfaces of the membrane sheet, the filtering sheet being
repeatedly wound on the filter tube in the form of a roll, while
being fixed on the one side of the filter tube; an adhesive sheet
adhered to the filtering sheet such that the filtering sheet takes
the circular housing appearance, while being wound on the filter
tube; and an activated carbon provided inside of the filter
tube.
2. The spiral wound type filter cartridge according to claim 1,
wherein the activated carbon is integrally joined to the filter
tube by filling a felt, non-woven fabric or paper type of activated
carbon fiber, or particle- or block type of activated carbon
therein.
3. The spiral wound type filter cartridge according to claim 1,
wherein activated carbon fiber is further provided in one or all of
the mesh sheet for membrane and the mesh sheet.
4. The spiral wound type filter cartridge according to claim 3,
wherein the surface or inside of the activated carbon fiber sheet
is coated or impregnated with an additive selected from the group
consisting of germicides, antibacterials, mineral agents, pH
adjusters and combinations thereof.
5. The spiral wound type filter cartridge according to claim 1,
wherein the filter tube and the filtering sheet constitute a
housing body taking a circular housing appearance through the
adhesive sheet and are arranged in a filter case, wherein the
filter case comprises: a body joined to the housing body so as to
cover the housing body, the body being provided with a
purified-water outlet hole in the rear thereof, to allow purified
water to be discharged, while passing through the housing body; and
a cover joined in the front of the body and provided with a raw
water inlet hole.
6. The spiral wound type filter cartridge according to claim 5,
wherein the filter cartridge further comprises: a filter block
provided between an area present in the inside front of the filter
case and an area present in the front of the housing body filter
case.
7. The spiral wound type filter cartridge according to claim 6,
wherein the filter block comprises a felt, non-woven fabric, paper
or cut shape of activated carbon fiber, or particulate or block
activated carbon.
8. The spiral wound type filter cartridge according to claim 6,
wherein one or more outlet holes are further provided on the rear
circumferential surface of the body constituting the filter case.
Description
TECHNICAL FIELD
[0001] The present invention relates to a spiral wound type filter
cartridge. More specifically, the present invention relates to a
spiral wound type filter cartridge, inside thereof capable of
serving as a carbon filter in a water purifier, thus eliminating
the necessity of the use of any carbon filter for pre- or
post-treatment in the process of purifying raw water, decreasing an
overall size of the water purifier and considerably reducing costs
associated therewith.
BACKGROUND ART
[0002] With recent economic development, the expansion of
industrial scale and the concentration of big cities and factories
have brought about a great increase in environmental contamination.
As a result, water pollution has become a serious problem and
drinking water is inevitablely purified through a water purifier
prior to use. A water purifier is necessarily provided with a
filter to filter raw water and the filter may be selected from a
variety of water-purifying filters including non-woven fabric,
activated carbon, activated carbon fiber (ACF), hollow fiber
membrane, ion exchange resin and reverse osmosis filters, depending
on the filtering method and steps.
[0003] As another conventionally used filter, a spiral wound type
filter cartridge is suggested, which is disclosed in detail in
Korean Patent No. 10-0477585, entitled "Method for preparing spiral
wound type separation membrane module".
[0004] The spiral wound type filter cartridge is generally moduled
in a spiral wound shape using a flat-sheet type of ultrafiltration,
nanofiltration or reverse osmosis membranes. In particular,
ultrafiltration or reverse osmosis membranes utilize a partial
filtration mode and are thus known to be highly resistant to
contamination, compared to filtration modes of hollow fiber
membranes, because a portion of introduced water containing
concentrated contaminants is discharged to a concentrated-water
discharge line. In addition, flat-sheet membranes used for
spiral-wound type modules are characterized in that they are coated
on a non-woven fabric and are thus more stable to operate at high
pressures, as compared to hollow fiber membranes, and have a
maximum efficient area for a constant volume. Meanwhile,
nanofiltration and reverse osmosis membranes generally used as
spiral wound type filter cartridges are capable of removing
materials harmful to the human body, for example, waste such as
iron or rust, microorganisms and heavy metal ions and are thus
widely utilized not only in household water-purifier filter
cartridges water but also in industrial water-purifier modules.
[0005] The spiral wound type filter cartridge comprises: a filter
tube provided with a purified-water outlet on one side thereof and
a plurality of water inlet holes in a longitudinal direction on the
outside thereof and being in the form of a pipe; a filtering sheet
repeatedly wound on the filter tube in the form of a roll, while
being fixed on the one side of the filter tube under the condition
that the one surface of a membrane sheet is closely adhered to a
mesh sheet; and an adhesive sheet adhered to the filtering sheet
such that the filtering sheet takes the circular housing
appearance, while being wound on the filter tube, and is joined to
a case provided with raw water inlet holes such that a purified
water outlet is exposed to the outside.
[0006] When a purified-water inlet holes of filter tube is seen
from the top in a longitudinal direction, the filtering sheet has a
structure wherein both sides of the filtering sheet and bottom of
the filter tube are closed by adhesion to take an envelope shape,
the membrane sheet arranged at both sides has an inner structure
wound in a spiral shape while including a mesh sheet for membrane
providing a water channel, allowing purified water to flow to a
filter tube, and the appearance thereof is wound to maintain the
spiral wound state.
[0007] The spiral wound type filter cartridge is installed in an
appliance such as a water purifier and carbon filters are provided
in an inlet through which raw water enters and in an outlet through
which purified water is discharged. Thus, the spiral wound type
filter cartridge, together with the two carbon filters,
sequentially filters the raw water.
[0008] The reason for providing carbon filters in the spiral wound
type cartridge in pre- and post-treatment processes is that the
spiral wound type filter cartridges can filter particulate
materials, microorganisms or toxic minerals, but, of these, in
particular, polyamide composite membranes have disadvantageously
poor resistance to materials such as chlorine residues, and carbon
filters are capable of efficiently removing contaminants such as
organic chemicals or offensive odors.
[0009] Furthermore, the carbon filters are made of particulate
activated carbon composed of materials such as wood, coconut or
coal particles specifically heat-treated in order to provide
several million fine holes, or of activated carbon fibers prepared
by carbonizing fibers, and are used to remove various chemical
contaminants. In particular, the carbon filters are effective in
removing organic chemicals such as insecticides, weedicides or
industrial waste and radon, chlorine and offensive odor thereof and
are thus necessarily provided in a filtering area. However, the
carbon filters disadvantageously cannot remove microorganisms or
toxic minerals.
[0010] Accordingly, when spiral wound type filter cartridges or
carbon filters are applied to water purifiers, the use of
additional carbon filters is inevitably required for the process of
pre- or post-treating the filter cartridges, thus disadvantageously
incurring costs required for securing a sufficient area of the
water purifiers and for installing the carbon filters.
SUMMARY OF THE INVENTION
[0011] Therefore, the present invention has been made in view of
the above problems, and it is an object of the present invention to
provide a spiral wound type filter cartridge, inside of which is
capable of serving as a carbon filter in a water purifier, thus
eliminating the necessity of the use of any carbon filter for pre-
or post-treatment in the process of purifying raw water.
[0012] In accordance with one aspect of the present invention for
achieving the above objects, there is provided a spiral wound type
filter cartridge, including: a filter tube provided with a
purified-water outlet on one side thereof, the filter tube provided
with a plurality of water inlet holes in a longitudinal direction
on the outside thereof, the filter tube being in the form of a
pipe; a filtering sheet comprising a membrane sheet composed of a
two-fold sheet to provide a filter area therein and provided with a
mesh sheet for membrane, and a mesh sheet provided with a channel
and laminated on one or both surfaces of the membrane sheet, the
filtering sheet being repeatedly wound on the filter tube in the
form of a roll, while being fixed on the one side of the filter
tube; an activated carbon fiber provided in the channel of the
filtering sheet or inside the filter tube; and an adhesive sheet
adhered to the filtering sheet such that the filtering sheet takes
the circular housing appearance, while being wound on the filter
tube.
[0013] When the activated carbon fiber is provided in the channel
of the filtering sheet, it may be provided on one or both sides of
the mesh sheet for membrane or the mesh sheet.
[0014] The activated carbon fiber may be in the form of a felt,
non-woven fabric or paper and may be integrally adhesive-bonded to
one or all of the mesh sheet for membrane, the mesh sheet and
inside the filter tube.
[0015] The activated carbon fiber may be composed of an activated
carbon fiber sheet and may be provided in one or both surfaces of
at least one of the mesh sheet for membrane and the mesh sheet.
[0016] The activated carbon fiber sheet may be impregnated or woven
from fiber yarns.
[0017] The inside of spiral wound type filter cartridge of the
present invention is capable of serving as a carbon filter in a
water purifier, thus eliminating the necessity of the use of any
carbon filter for pre- or post-treatment in the process of
purifying raw water, decreasing an overall size of the water
purifier and considerably reducing costs associated therewith.
[0018] In addition, the activated carbon fiber is introduced in a
spiral shape into the spiral wound type filter, thus increasing
contact efficiency of treated water, improving the efficiency of
the activated carbon fiber, and imparting desired functions to the
activated carbon fiber through treatment of high-porisity activated
carbon fiber with antibacterials or germicides.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The above and other objects, features and other advantages
of the present invention will be more clearly understood from the
following detailed description taken in conjunction with the
accompanying drawings, in which:
[0020] FIG. 1 is a perspective view illustrating a spiral wound
type filter cartridge according to the present invention;
[0021] FIG. 2 is an exploded perspective view illustrating a
principal part of the filter cartridge of FIG. 1;
[0022] FIG. 3 is an enlarged view illustrating a longitudinal
cross-section of the filter cartridge of FIG. 1 or 2;
[0023] FIG. 4 is a sectional view illustrating a state in which an
activated carbon filter sheet is applied according to another
embodiment of the present invention;
[0024] FIG. 5 is an exploded perspective view illustrating a
membrane sheet according to another embodiment of the present
invention;
[0025] FIG. 6 is an exploded perspective view illustrating a
principal part of a membrane sheet according to another embodiment
of the present invention;
[0026] FIG. 7 is a sectional view illustrating a state wherein the
housing body of FIG. 6 is applied to a filter case; and
[0027] FIG. 8 is a graph showing a chlorine residue removal ratio
as a function of purified water, for the spiral wound type filter
cartridge provided with the activated carbon fiber sheet and the
mesh sheet for membrane.
DETAILED DESCRIPTION OF THE INVENTION
[0028] Hereinafter, exemplary embodiments of a spiral wound type
filter cartridge according to the present invention will be
described with reference to the annexed drawings in more detail. A
detailed explanation of the prior arts related to the description
of the present invention is omitted for a clear understanding of
the principle of the present invention.
[0029] The present invention is directed to a spiral wound type
filter cartridge constituting a filter for purifying water.
[0030] The spiral wound type filter cartridge comprises: a filter
tube 100 including a purified water outlet 120; a filtering sheet
200 composed of a membrane sheet 220 provided with a mesh sheet 224
for membrane and a mesh sheet 240, serves to guide and purify raw
water through a channel and is wound in the form of a roll on the
filter tube 100; an activated carbon fiber 300 provided in the
channel formed by the filtering sheet 200; and an adhesive sheet
400 to allow the filtering sheet 200 to maintain a circular
appearance, while wound on the filter tube 120.
[0031] The filter tube 100 is in the form of a pipe such that the
purified-water outlet 120 is open at one side thereof and comprises
a plurality of purified-water inlet holes 140 arranged in a
longitudinal direction on the outside thereof, to allow
purified-water to be introduced through the purified-water inlet
holes 140 and then discharged through the purified-water outlet
120.
[0032] The filtering sheet 200 comprises the membrane sheet 220,
and the mesh sheet 240 closely adhered to one or both sides of the
membrane sheet 220, and is repeatedly wound in a screw direction,
while the one side of the membrane sheet 220 and the one side of
the mesh sheet 240 are fixed on the one side of the filter tube
100.
[0033] That is, the filtering sheet 200 is repeatedly wound in the
form of a roll cake, while the one side thereof is fixed on the
filter tube 100.
[0034] The membrane sheet 220 is composed of a two-fold sheet to
provide a filter area 222 therein and the filter area 222 is
provided with a mesh sheet for membrane 224.
[0035] The preferable activated carbon fiber 300 is in the form of
a felt, paper or non-woven fabric, or made by weaving woofs and
warps together, and the activated carbon fiber 300 is preferably
adhered to the mesh sheet for membrane 224 or the mesh sheet 240.
Also, the activated carbon fiber 300 is preferably added in the
form of a sheet on one or both sides of the mesh sheet for membrane
224 or the mesh sheet 240.
[0036] The activated carbon fiber 300 may be provided for one or
both of the mesh sheet for membrane 224 provided in the membrane
sheet 220 constituting the filtering sheet 200, and the mesh sheet
240, depending on water purification conditions. At this time, the
shapes of the activated carbon fiber 300 may be identical or
different.
[0037] That is, the activated carbon fiber 300 is integrally bonded
to the mesh sheet for membrane 224 or the mesh sheet 240, or is
made of an activated carbon fiber sheet 320, thus being provided on
one or both sides of the mesh sheet for membrane 224 or the mesh
sheet 240. Furthermore, both the bonding and sheet-type addition
may be applied.
[0038] The activated carbon fiber sheet 320 may be selected from
those made by binding fiber yarns in the form of a felt, paper or
non-woven fabric or made by weaving woofs and warps together.
[0039] The activated carbon fiber 300 may have a specific surface
area of 500 to 3,000 .sup.2/g.
[0040] In addition, if necessary, various functional substances may
be introduced as additives to impart various functions to the
surface or inside of the activated carbon fiber sheet 320. That is,
the functions may be imparted by coating additives on the surface
of the activated carbon fiber sheet 320 or impregnating the same
therein for homogeneous dispersion.
[0041] The present invention is not particularly limited with
regard to the additives. Specifically, the additives may be
selected from the group consisting of germicides, antibacterials,
mineral agents, pH adjusters and combinations thereof so long as
they not deteriorate the functions of the activated carbon fiber
sheet 320.
[0042] The additives may be selected by those skilled in the art so
as to suit the apparatus or field to which the filter cartridge
according to the present invention is applied. For example, an
antibacterial may be coated on the activated carbon fiber sheet 320
or impregnated therein to impart sterilizing and antibacterial
actions thereto.
[0043] Any antibacterial may be used without particular limitation
so long as it is well-known in the art. For example, the
antibacterial may be selected from the group consisting of
nano-silver, vitamin C, kitosan powders and combinations thereof.
In particular, nano-silver is known to have superior antibacterial
activity. Nano-silver exhibits superior antibacterial activity to
various bacteria, viruses and the like. More specifically, in the
case where nano-silver is introduced into the activated carbon
fiber sheet 320, an area where the activated carbon fiber sheet 320
is present is in contact with purified and filtered water, thus
allowing the nano-silver to impart antibacterial activity to the
final purified and filtered water and maintaining the antibacterial
activity of the water.
[0044] In addition to the antibacterial or separately therefrom, a
mineral agent or pH adjuster is coated on the activated carbon
fiber sheet 320 or impregnated therein to provide mineral water, or
alkaline or acid water through the control of pH.
[0045] The mineral agent and pH adjuster may be used without
particular limitation so long as they are known in the art.
Examples of useful mineral agents and pH adjusters include elvan,
tourmarine, zeolite, germanium, illite and the like. These ceramics
are silicate minerals including alkalis such as sodium, potassium,
calcium, magnesium and the like. The alkali reacts with water in
contact with the activated carbon fiber sheet to provide alkaline
or mineral active water.
[0046] For example, one calcium molecule reacts with two water
molecules to form calcium hydroxide, as depicted in the following
Reaction Scheme. In this process, a portion of electrons derived
from calcium is used for formation of hydrogen gas and the
remaining electrons are present in the water and induce formation
of hydroxyl groups.
[0047] As a result, an increase in hydroxyl groups (OH-) formed
from the reaction of calcium and water induces an increase in pH,
and the water becomes alkaline reduced water and, at the same time,
mineral active water in which the calcium ions (Ca.sup.2+) are
dissolved.
Ca+2H.sub.2O.fwdarw.Ca(OH).sub.2+H.sub.2(=2H+2e.sup.-).uparw..fwdarw.Ca.-
sup.2++2OH.sup.-+H.sub.2.uparw.
[0048] Accordingly, without purchasing an additional alkaline
reduced water supply device, alkaline reduced water or mineral
active water can be obtained by introducing mineral agents or pH
adjusters into the activated carbon fiber sheet 320.
[0049] When these additives are applied to the activated carbon
fiber sheet 320, they are used such that they do not clog the pores
of the activated carbon fiber sheet 320 and do not impair physical
properties. The content of the additives is suitably determined
while taking into consideration the desired effects, and physical
and economical properties of the activated carbon fiber sheet 320.
Preferably, the additives are used in an amount of not more than 30
parts by weight, with respect to 100 parts by weight of the
activated carbon fiber sheet 320.
[0050] The adhesive sheet 400 is an element in which an adhesive is
applied onto one side thereof, and is adhered to the filtering
sheet 200 such that the filtering sheet 200 takes the circular
housing appearance, while being wound on the filter tube 100.
[0051] In addition, the activated carbon fiber 300 is determined
depending on the contact time of introduced water, the density of
activated carbon fiber, the amount of the activated carbon fiber
and the amount of water passing through the activated carbon fiber,
and the activated carbon fiber 300 may thus be manufactured in the
form of a felt, non-woven fabric, paper, sheet or woven fabric.
[0052] In addition, the spiral wound type filter cartridge may be
provided with an activated carbon 500 in the entire inside of the
filter tube 100 or in a predetermined area of the purified water
outlet 120. The activated carbon 500 may be integrally joined to
the filter tube by filling a felt, non-woven fabric or paper shape
of activated carbon fiber, or particle- or block-type activated
carbon therein. The block activated carbon may be prepared from
activated carbon fiber or particulate activated carbon.
[0053] The activated carbon fiber may be further introduced into
one or all of the mesh sheet for membrane 224 and the mesh sheet
240. The activated carbon fiber may be integrally formed with the
mesh sheet for membrane 224 or the mesh sheet 240 in the form of a
felt, non-woven or paper or be provided in the form of a sheet on
one or both surfaces thereof. In this case, the germicide,
antibacterial, mineral agent, pH adjuster and a combination thereof
may also be applied to the activated carbon fiber sheet.
[0054] As mentioned above, the present invention provides a filter
cartridge provided with a spiral shape of activated carbon fiber,
thus allowing inside of the filter cartridge to serve as a carbon
filter and eliminating the necessity of using any carbon filter for
the pre- or post treatment process upon purifying water. As a
result, the efficiency with which the activated carbon fiber
contacts treatment water increases, thus increasing the efficiency
of activated carbon, functionality is imparted to the activated
carbon fiber, thus preventing biological contamination and
deterioration in physical properties of filter media (such as
ultrafiltration, nanofiltration or reverse osmosis membranes) by
organic compounds, due to antibacterial and sterilization
activities of the filter media. Furthermore, polyamide composite
membranes are used as the filter media to prevent deterioration in
durability which may be caused by chlorine residues, thus
decreasing the overall size of water purifiers and considerably
reducing costs associated therewith.
[0055] In addition, FIGS. 6 and 7 illustrate another embodiment of
the present invention. As shown in FIGS. 6 and 7, the filter tube
100 and the filtering sheet 200 constitute a housing body 800
taking a circular housing appearance through the adhesive sheet 400
and are thus arranged in a filter case 600.
[0056] The filter case 600 comprises a body 610 which is joined to
the housing body 800 such it covers the housing body 800 and is
provided with a purified-water outlet hole 612 in the rear thereof,
to allow purified water to be discharged, while passing through the
housing body 800, and a cover 620 joined to the front of the body
610 and provided with raw water inlet holes 622.
[0057] A filter block 700 is further provided between an area
present in the inside front of the filter case 600 and an area
present in the front of the housing body 800, to allow introduced
raw water to be primarily filtered through the filter block 700 and
then secondarily filtered through the housing body 800.
[0058] The filter block 700 serves to filter raw water, which may
be composed of various materials such as activated carbon fibers.
Representatively, the filter block may take a felt, non-woven
fabric, paper or cut-shape. The filter block material may be
activated carbon fiber, or particulate or block activated carbon,
and the present invention is not limited thereto.
[0059] In addition, an outlet hole 614 is further provided on the
rear circumferential surface of the body 610 constituting the
filter case 600, to allow the raw water to be filtered through the
filter block 700 and then to be immediatedly discharged.
Accordingly, the final water is suitable for use as living
water.
[0060] Hereinafter, a process for assembling the spiral wound type
filter cartridge and a process for purifying water using the same
will be described in detail.
[0061] Upon assembly, first, the membrane sheet 220 provided with
the mesh sheet for membrane 224 is folded in half and a mesh sheet
240 is laminated on one or both sides thereof, to constitute a
filtering sheet 200. Then, one side of the mesh sheet 240 is fixed
on the one side of the filter tube 100, an adhesive is applied to
the edge thereof and the filtering sheet 200 is wound in the form
of a roll. Subsequently, the adhesive sheet 400 is adhered to one
end of the filtering sheet 200 to form the housing body 800 taking
a circular appearance.
[0062] Then, the housing body 800 is inserted through a packing 260
into the filter case 600 provided with raw water inlet holes 622
and a purified-water outlet hole 612, the purified water outlet 120
of the filter tube 100 is closely joined to the purified-water
outlet hole 612 through a means such as an O-ring such that they
communicate with each other, and the filter case 600 is installed
in a water purifier, to complete assembly.
[0063] Then, when a water purifier is operated, after being
introduced through the raw water inlet holes 622 of the filter case
600, raw water is primarily filtered through the filter block 700
and then secondarily wound in the form of a roll, and foreign
materials are filtered, while passing through the channel provided
by the mesh sheet for membrane 224 and the mesh sheet 240 inside
the membrane sheet 220 constituting the filtering sheet 200.
Simultaneously, the raw water is filtered, while passing through
the activated carbon fiber 300 arranged depending on water
purification conditions, and is purified through the purified water
inlet holes 140 and the purified water outlet hole 120 formed on
the filter tube 100 and then discharged through the purified water
outlet hole 612.
[0064] Hereinafter, preferred examples will be provided for a
further understanding of the invention. The following Examples and
Comparative Examples are for illustrative purposes only and are not
intended to limit the scope of the present invention.
EXAMPLE 1
[0065] As shown in FIG. 5, a spiral wound type filter cartridge was
manufactured from sheets made of activated carbon fiber. More
specifically, the filter cartridge was manufactured by applying an
activated carbon fiber sheet to the mesh sheet for membrane. 5 tons
of water was introduced into the spiral wound type filter cartridge
thus manufactured and a chlorine-residue removal ratio was
measured. The results thus obtained are shown in FIG. 8.
[0066] FIG. 8 is a graph showing a chlorine-residue removal ratio
as a function of water to be purified, for the spiral wound type
filter cartridge provided with the activated carbon fiber sheet and
the mesh sheet for membrane.
[0067] As shown in FIG. 8, the chlorine residue removal performance
is good even at an initial water purification stage and stays at
about 95% or higher until the 5 tons of water is completely
purified. This behavior corresponds to the water flow direction and
increases water treatment contact efficiency of the activated
carbon fiber.
[0068] Although the preferred embodiments of the spiral wound type
filter cartridge according to the present invention have been
disclosed for illustrative purposes, those skilled in the art will
appreciate that various modifications, additions and substitutions
are possible, without departing from the scope and spirit of the
invention as disclosed in the accompanying claims.
[0069] The present invention is applied to a water purifier
filter.
* * * * *