JP4646282B2 - Water purifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water purifier for supplying delicious and safe water by removing chlorine, odor-causing substances, harmful substances and the like contained in tap water and other raw water.
[0002]
[Prior art]
In order to supply safe water, tap water is obliged to add chlorine for sterilization. For this reason, there is little concern that tap water will be contaminated by various bacteria, but the taste of water will be impaired by the odor of lime. It has also been confirmed that carcinogenic trihalomethanes are produced in tap water by reacting chlorine with organic substances such as humic substances contained in tap water.
In addition, due to pollution of rivers and lakes in recent years, it has also been confirmed that tap water that uses these as raw water contains a mold odor-causing substance such as 2-methylisoborneol as a trace component. Water purifiers for removing these water-damaging substances and harmful substances are widely used.
[0003]
[Problems to be solved by the invention]
In the case of a water purifier using a granular filter medium, when the granular filter medium is filled into the cartridge main body container, the particle packing density is small simply by pouring the granular filter medium into the cartridge body container. When water is applied, a gap is generated in the filter medium layer in the process where the packing of the granular filter medium in the cartridge becomes dense.
In order to increase the packing density, there is also known a method of filling the filter medium while vibrating the cartridge. However, if the filter medium is filled up to the full volume of the cartridge body container, the lid is bonded, welded or screwed. At the time of joining, the particles of the filter medium are likely to be caught between the adhesion / welding part or the screw part, and as a result, adhesion, welding, and poor fitting of the lid to the cartridge body are caused.
[0004]
For this reason, it is necessary to adjust the filling amount of the activated carbon slightly. As a result, a gap is formed in the filter material filling portion of the cartridge, and water preferentially passes through the portion, so that the contact between the filter material and water is sufficient. Therefore, there was a problem that the ability of the filter medium could not be sufficiently utilized, and the removal target substance passed through early. This short circuit phenomenon of the flow path can be prevented to some extent by arranging the cartridge so that the water flow direction is the same as or opposite to the vertical direction as in the example of FIG. 4, but as shown in the example of FIG. This is particularly noticeable when the cartridge is arranged so that the direction intersects the vertical direction.
[0005]
Japanese Patent Application Laid-Open No. 7-88473 describes a method of filling a gap by mixing a water-absorbing polymer with activated carbon, supplying water to the water-absorbing polymer when water is passed, and expanding the water-absorbing polymer. However, this method has a concern that a strange odor or taste is transferred from the water-absorbing polymer to the filtered water, and the water-absorbing polymer adheres to the partition member, making it difficult to pass water.
[0006]
Japanese Patent Application Laid-Open No. 7-24447 discloses a method in which a coil spring is provided between the filter medium and the lid to urge the filter medium upward so as not to generate a gap. However, this method is not only complicated in construction, but also has a concern that the coil spring is always in a compressed state, so that the coil spring deteriorates with time and the filter medium cannot be urged.
[0007]
This invention is made | formed in order to solve said problem, and provides the water purifier with the simple structure which does not produce the flow path short circuit by the clearance gap in a granular filter material layer.
[0008]
[Means for Solving the Problems]
That is, the gist of the present invention is a water purifier comprising a cylindrical main body container that is open on one side and a lid part that is coupled to the main body container and closes the main body opening part, and has a granular filtering material inside the lid part . The water purifier is characterized in that a convex portion is provided on the lid portion, and the convex portion protrudes into the space inside the main body container when the main body container and the lid portion are combined. is there.
Further, when the main body container and the lid are combined, the volume of the portion existing inside the main body container in the convex portion is V1, and the granular filter material on the main body opening portion side is When the volume of the non-existing portion in the main body container is set to V2, if V1 / V2> 0.3 is satisfied, it is possible to reliably prevent a decrease in the use efficiency of the filter medium due to a short circuit of the water flow.
In addition, when a water purifier having a convex part on the lid is arranged so that the central axis of the cylinder of the main body container intersects the vertical direction, the space in the vertical direction is saved without reducing the efficiency of use of the filter medium. can do.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described. FIG. 1 is a cross-sectional view showing an example of the water purifier of the present invention, wherein 1 is a main body container, 2 is a lid, 3 is a water inlet, 4 is a water outlet, 5 is an eye plate, 6 is a hollow fiber membrane module, 7 Is a granular filter material, 8 is an outer layer, 9 is an inner layer, and 10 is a medium eye plate.
[0010]
In order to obtain filtered water, raw water is supplied from the incoming water part 3, passes through the eye plate 5, passes through the outer layer 8 located on the outer periphery of the hollow fiber membrane module in the packed layer of the granular filter material 7, We hit part 2. Thereafter, the hollow fiber membrane module 6 passes through a slit portion provided in a portion where the hollow fiber membrane module 6 is fitted to the lid portion 2, and the filter material filling portion inner layer 9, the medium-medium plate 10, the hollow fiber provided inside the hollow fiber membrane module 6. Purified filtered water that passes through the membrane module 6 is obtained from the water outlet 4.
[0011]
In the manufacturing process of this water purifier, with the open part side of the cylindrical main body container 1 opened on one side facing up, the eye plate 5, the hollow fiber membrane module 6, and the medium eye plate 10 are inserted, The granular filter material 7 is charged and filled from the upper part of the open part. The shape of the main body container 1 is not necessarily limited. For example, a shape such as a polygonal column shape or a truncated cone shape may be used, but a cylindrical shape is more preferable because pressure resistance and formability are improved.
[0012]
The method of connecting the main body container 1 and the lid 2 is not necessarily limited, and a method of forming holes in both members and connecting them through bolts, a method of sandwiching them with C-rings from both members and fastening them, etc. is used. However, the method of forming the male screw / female screw on both members and fitting them is preferable because the number of parts can be reduced.
Regardless of the coupling method, in order to prevent poor fitting due to the granular filter material being caught, the lid is not filled with the granular filter material until the end of the open part of the main body container, and has a certain gap. Put two.
[0013]
Here, by using the lid portion 2 having the convex portion, the granular filter material filling portion, which has been provided with a gap in manufacturing, is filled with the convex portion of the lid portion, so that the short-circuit flow path regardless of the arrangement direction of the cartridge. It is possible to obtain a water purifier that exhibits good removal performance.
[0014]
As shown in FIG. 1, the lid portion 2 having the convex portion may be one constituent member as the bottom lid 2 a, or as shown in FIG. 2, the bottom lid 2 a and the core 11 are separated from each other. As an alternative, the lid 2 may be formed in combination during manufacture.
The shape of the convex portion is not particularly limited as long as it is disposed on the inner side of the main body from the open portion AA ′ surface of the main body container 1 and can maintain the pressure resistance during use.
[0015]
When the core 11 is used, the joint surface with the bottom lid 2 is preferably matched to the joint surface shape on the bottom lid 2 side. It is difficult to liquid-tightly join the core 11 and the main body container 1, and a certain amount of space is formed between the core 11 and the bottom cover 2. When the gap is large, it is desirable to minimize the gap because water enters the gap with water flow and forms water that does not change during long-term use.
In the core shown in FIG. 2, since the joint surface of the bottom lid 2 and the core 11 has substantially the same shape, even if water is dead, there is a trace amount, which is a problem in long-term use. It has no structure. In addition, as shown in FIG. 1, when the cover part is formed only by the bottom cover having a convex shape, there is no death of water.
[0016]
FIG. 5 is a view schematically showing the main body container 1 of the present invention, the granular filter medium 8 and the lid 2 filled in the container. When the main body container 1 and the lid portion 2 are joined, the volume of the portion existing inside the main body container 1 in the convex portion is set to V1, and the part where the granular filter material does not exist on the main body opening portion side When the volume in the main body container is V2, if V1 / V2> 0.3 is satisfied, it is possible to reliably prevent a decrease in the efficiency of use of the filter medium due to a short circuit of the water flow, which is preferable.
[0017]
When V1 / V2 is less than 0.3, the formed gap becomes large, and the short circuit of the water flow cannot be effectively prevented, so that the performance of the filter medium cannot be sufficiently exhibited.
If V1 / V2> 0.3, the effect of preventing a short circuit of the water flow is sufficient, but if the convex volume V1 is made larger than the gap volume V2, the convex portion of the lid portion 2 is accommodated inside the main body container 1. Therefore, V1 / V2 = 1 is the physical upper limit.
[0018]
Further, when the length of the cylindrical cartridge body in the longitudinal direction is L and the maximum diameter of the cross section is D, when L / D> 0.7, the thickness of the granular filter medium layer can be secured, and the short circuit flow This is preferable because the effect of preventing the formation of the path is increased.
[0019]
As the particulate filter used in the water purifier of the present invention, any particulate filter such as activated carbon, ion exchange resin, cinnabar sand, and ceramics may be used as long as it is conventionally used in water purifiers. More preferred is granular activated carbon. In addition, as the filter medium, various granular filter media may be used alone or in combination.
Moreover, when using a hollow fiber membrane, well-known things, such as a polyolefin type and a polysulfone type, can be used.
[0020]
The main body container 1 and the bottom lid 2 constituting the water purifier of the present invention are preferably made of a plastic such as an ABS resin, an AS resin, a PP resin, a PE resin, or a polycarbonate resin in consideration of cost and moldability. The wall thickness is preferably 3 mm or more in consideration of pressure resistance.
[0021]
Hereinafter, the present invention will be specifically described based on examples.
<Example 1>
A hollow fiber membrane module having an outer diameter of 54 mmφ is inserted into a cylindrical main body container having an opening inner diameter of 86 mmφ and a height of 163.2 mm, and the particle size ranges from 24 mesh to 42 mesh as shown in FIG. Was filled with 220 g of activated carbon.
After filling with activated carbon, when the main body container and the lid are combined, the height from the main body container opening to the top of the convex is 13.9 mm and V1 / V2 = 0.48 is formed. A water purifier was sealed with the lid.
[0022]
This water purifier was subjected to a free residual chlorine filtration capacity test when the flow rate was 4.5 L / min based on JIS S 3201 “Home Water Purifier Test Method”. At this time, the arrangement direction of the main body container was arranged so that the longitudinal direction of the cylinder faced sideways.
As a result, the total filtration flow rate until the removal rate reached 80% was 33.1 m ³ .
[0023]
<Example 2>
Except for using a lid portion in which the height from the open portion of the main body container to the apex of the convex portion is 9.8 mm and the convex portion is formed so that V1 / V2 = 0.33, it remains free as in Example 1. A chlorine filtration ability test was conducted.
As a result, the total filtration flow rate until the removal rate reached 80% was 32 m ³ .
[0024]
<Example 3>
Except for using a lid part in which the height from the open part of the main body container to the top of the convex part is 7.3 mm and the convex part is formed so as to be V1 / V2 = 0.25, it remains free as in Example 1. A chlorine filtration ability test was conducted.
As a result, the total filtration flow rate until the removal rate reached 80% was 22.9 m ³ .
[0025]
<Comparative Example 1>
A free residual chlorine filtration ability test was carried out in the same manner as in Example 1 except that no convex portion was formed on the lid.
As a result, the total filtration flow rate until the removal rate reached 80% was 13.5 m ³ .
[0026]
FIG. 6 is a graph showing the relationship between V1 / V2 and the total filtration flow rate until the removal rate reaches 80% in the examples and comparative examples. From the graph, it can be seen that the total filtration flow rate is increased by providing the convex portion on the lid, and in particular, the total filtration flow rate is significantly improved by setting V1 / V2> 0.3.
[0027]
【The invention's effect】
According to the present invention, by providing a convex portion on the lid, the gap of the granular filter material packed layer is reduced regardless of the cartridge arrangement direction, and the performance of the filter medium is fully expressed without generating a short circuit flow path. Water purifier can be obtained.
In addition, when the volume of the part existing inside the main body container is V1, and the cover part is removed with the main body open part AA ′ surface up, in the main body container, When the volume of the upper portion of the particulate filter material where no granular filter material is present is V2, if V1 / V2> 0.3 is satisfied, a decrease in the efficiency of use of the filter material due to a short circuit of the water flow can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a water purifier according to the present invention.
FIG. 2 is a cross-sectional view showing an example of a lid portion of the present invention.
FIG. 3 is a cross-sectional view showing an example of a conventional water purifier.
FIG. 4 is a cross-sectional view showing an example of a conventional water purifier.
FIG. 5 is a cross-sectional view schematically showing a main body container and a lid portion of the present invention.
FIG. 6 is a graph showing the relationship between V1 / V2 and the total filtration flow rate until 80% removal of residual chlorine in Examples and Comparative Examples of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body container 2 Cover part 2a Bottom cover 3 Inlet part 4 Outlet part 5 Eye plate 6 Hollow fiber membrane module 7 Granular filter medium 8 Outer layer 9 Inner layer 10 Middle eye plate 11 Core

Claims (3)

In a water purifier having a cylindrical main body container open on one side and a lid part that is coupled to the main body container and closes the main body open part, and has a granular filter material inside the lid part, a convex part is formed on the lid part. A water purifier characterized in that, when the main body container and the lid are coupled, the convex portion projects into the space inside the main body container.   When the main body container and the lid are combined, the volume of the portion existing inside the main body container in the convex portion is set to V1, and the granular filter material on the main body opening portion side does not exist. The water purifier according to claim 1, wherein when the volume of the part in the main body container is V2, V1 / V2> 0.3 is satisfied.   The water purifier of Claim 1 or 2 arrange | positioned so that the center axis | shaft of the cylinder of the said main body container may cross | intersect with respect to a perpendicular direction.

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