JPH09108661A - Cartridge for purifying water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obviate the deviation of the filter medium partition plate of a cartridge formed by segmenting filter media (adsorbents) and hollow fiber membranes with the filter medium partition plate and housing both in a cylindrical housing and to prevent the leakage of filter media by making it possible to fix the filter medium partition plate by the step parts formed in the circumferential direction of the inside wall of the cylindrical case and plural projecting parts. SOLUTION: The housing 3 of the cartridge is cylindrical and is provided with a raw water inflow port 5 in its lower part and a clean water discharge port 6 in its bottom. The cylindrical case 1 having the filter media 2a consisting of granular active carbon and the filter media 2b consisting of the polyethylene hollow fiber membranes is sealed and fixed by means of an O-ring into the housing 3, by which the cartridge of a double pipe structure is constituted. The inside wall of the case 1 is provided with four pieces of the step parts 8 and the projecting parts 9 circumferentially at equal intervals. The filter medium partition plate 7 is fixed by the step parts 8 and the projecting parts 9. As a result, the deviation of the partition plate 7 is prevented and the mixing of the filter media with the other filter media by the leakage of the filter media is averted. The sufficient filtration performance is thus exhibited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification cartridge for purifying tap water.

[0002]

BACKGROUND ART Although tap water as drinking water has a certain level of safety according to its water quality standard, it is necessary to use a water purifier to further purify tap water in order to obtain safer and tastier water. is increasing. Usually, in a water purifier, an adsorbent such as activated carbon is used to remove odor of musty odor, musty odor, trihalomethane, etc., and a porous hollow fiber membrane used in combination is also used to remove bacteria, pollutants and the like. A cartridge containing a filter medium is used for the water purifier because of the ease of replacement of the filter medium when its purification capacity is deteriorated.

As this cartridge, there is known a double-tube structure cartridge in which a cylindrical case accommodating a filter medium is arranged inside a cylindrical housing, and two or three kinds of filter medium are meshed in the case. It is also known that they are separated and stored by a partition plate. However, in the conventional cartridge, as shown in FIG. 3, the filter medium partition plate is set only by bridging it over the stepped portion of the step portion provided in the circumferential direction of the inner wall of the cylindrical case, and the filter medium partition plate is surely secured in the opposite direction. It wasn't fixed.

For this reason, if the filter medium on the partition plate is not densely packed, the partition plate will shift during handling such as transportation and transportation of the cartridge, during initial water flow, etc., and the filter medium will leak out. There was a situation in which the material was mixed with the filter material and satisfactory filtration performance was not exhibited. Due to the manufacturing of the cartridge, it is difficult to densely fill the filter medium, and it is difficult to densely fill the filter medium.
It is not preferable because the water flow resistance of the filter medium filling portion increases and the purified water flow rate decreases.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a water purification cartridge in which the filter media partition plate is not displaced, prevents the filter media from being mixed with other filter media due to leakage, and exerts the filtering performance of each filter media well. The purpose is to

[0006]

DISCLOSURE OF THE INVENTION The present invention is a cartridge for a water purifier in which a cylindrical case, in which an adsorbent as a filter medium and a hollow fiber membrane are stored separately by a filter partition plate, is arranged inside a cylindrical housing. According to the present invention, there is provided a water purification cartridge characterized in that the filter medium partition plate is fixed by a step portion and a plurality of protrusion portions which are respectively provided in the circumferential direction of the inner wall of the cylindrical case.

[0007]

1 is a vertical sectional view of an example of a water purification cartridge of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. In the figure, 1 is a cylindrical case, 2a is an adsorbent, 2b is a hollow fiber membrane, 3 is a cylindrical housing, 4 is an O-ring, 5 is a raw water inlet, 6 is a purified water outlet, 7 is a filter partition plate, 8 Indicates a step and 9 indicates a protrusion.

The cartridge of the present invention has a double tube structure in which a cylindrical case containing a filter medium is arranged inside a cylindrical housing. The inner wall of the case arranged inside the housing is A step portion and a plurality of protrusions are provided in the circumferential direction, respectively, and the filter medium partition plate is sandwiched between the step portion and the plurality of protrusions and fixed.

In the case, the adsorbent as a filter medium and the hollow fiber membrane are separated by a filter partition plate and stored. The stepped portion provided on the inner wall of the case is formed by making the inner diameter of the case different at the boundary between the adsorbent storage portion and the hollow fiber membrane storage portion. Preferably, the adsorbent storage portion is on the upstream side and the hollow fiber membrane is on the downstream side. The storage part is arranged and the inner diameter of the case in the hollow fiber membrane storage part is made smaller than the inner diameter in the adsorbent storage part, or in the hollow fiber membrane storage part at the boundary between the adsorbent storage part and the hollow fiber membrane storage part. A shelf is provided to partially reduce the inner diameter of the case, and a step having a level difference of 0.5 to 2 mm is provided.

Further, the protrusion provided on the inner wall of the case prevents the filter medium partition plate from being displaced over the stepped portion of the step portion, and is formed at an interval corresponding to the thickness of the filter medium partition plate. The protrusions are made of the same material as or different from the case, and the protrusions having a width of 2 to 10 mm, a thickness of 1 to 5 mm, and a protrusion length of 0.5 to 2 mm in the circumferential direction of the inner wall of the case are preferably at equal intervals. 6
Provided.

The filter media partition plate divides the adsorbent of the filter media from the hollow fiber membrane and is covered with a water-permeable mesh.
It is made of a material having flexibility that can be slightly deformed / restored when mounted in the case and strength that can withstand water pressure when passing water, and is preferably made of polypropylene resin to have a thickness of 1 to 3 mm.

As the adsorbent used as the filter material, various adsorbents used in conventional water purifiers such as activated carbon and ion exchange resins are used. The hollow fiber membrane of one filter medium is a porous hollow fiber membrane made of polyethylene, polysulfone or the like, and a conventionally known one is applied as it is.

The housing and the case for accommodating the filter medium are made of a synthetic resin such as ABS and a metal such as stainless steel, and the material thereof is not particularly limited. The cartridge of the present invention may be attached to a water purifier, and the housing may be provided with a raw water inflow port and a purified water discharge port to form a water purifier body.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to an embodiment as shown in FIG.
In the ABS resin housing 3 of the cartridge
Is a cylindrical shape having a diameter of 55 mm and a height of 105 mm, a raw water inlet 5 is provided 30 mm above the lowermost portion, and a purified water outlet 6 is provided at the bottom. Inside the housing 3, a cylindrical ABS resin case 1 having filter media 2a and 2b is sealed and fixed by an O-ring 4 to form a double-tube cartridge.

In the case 1, a step portion 8 having a step of 1 mm is formed on the inner wall, and a protrusion portion 9 having a width of 5 mm, a thickness of 2 mm and a protrusion length of 1 mm.
4 were provided at equal intervals in the circumferential direction. The filter material partition plate 7 was made of polypropylene resin and had a thickness of 2 mm. In the case 1, a polyethylene hollow fiber membrane (manufactured by Mitsubishi Rayon Co., Ltd.) as a hollow fiber membrane 2b was housed on the downstream side in a membrane area of 0.15 m ^2, and a filter media partition plate 7 was fixed by a step 8 and a protrusion 9. As the adsorbent 2a, 21 g of granular activated carbon was filled. As a comparison,
A cartridge was similarly prepared by accommodating the activated carbon 2a and the hollow fiber membrane 2b in a case 1 having no protrusion 9 shown in FIG.

The above two kinds of cartridges were placed sideways on a horizontal vibrator having a frequency of 60 Hz and an amplitude of 1 mm and vibrated for 1 hour. After that, raw water having a water temperature of 25 ° C. and a residual chlorine concentration of 2 ppm is passed through the cartridge by adjusting the original pressure so that the discharge rate of the purified water is 3 liters / minute, and the residual chlorine concentration in the purified water is 0.4 ppm. When the total filtration flow rate up to was measured, it was 2200 liters for the comparative cartridge, but it was 2400 liters for the cartridge of the present invention, and a processing capacity difference of 9% occurred.

[0017]

INDUSTRIAL APPLICABILITY The water purification cartridge of the present invention does not displace the partition plate during handling, initial water passage, etc., and does not mix with other filter media due to leakage of the filter media, so that the filtration performance of each filter media is sufficient. According to the water purifier equipped with the cartridge of the present invention, safe and delicious water can be obtained from tap water for a long period of time.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of an example of a water purification cartridge of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a vertical cross-sectional view of an example of a conventional water purification cartridge.

[Explanation of symbols]

 1 Cylindrical Case 2a Adsorbent 2b Hollow Fiber Membrane 3 Cylindrical Housing 4 O-ring 5 Raw Water Inlet 6 Purified Water Discharge Port 7 Filter Partition Plate 8 Step 9 Projection

Claims (2)

[Claims] 1. A water purifier cartridge in which a cylindrical case, in which an adsorbent as a filter medium and a hollow fiber membrane are separated and stored by a filter medium partition plate, is arranged inside a cylindrical housing,
A filter cartridge for water purification, characterized in that a filter medium partition plate is fixed by a step portion and a plurality of protrusion portions provided in a circumferential direction of an inner wall of a cylindrical case. 2. The water purification cartridge according to claim 1, wherein the filter media partition plate is made of polypropylene resin.