JP3871366B2 - Water purification cartridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water purification cartridge for purifying tap water.
[0002]
[Prior art]
Although tap water as drinking water has some safety according to its water quality standards, the use of water purifiers for further purifying tap water is increasing in order to obtain safer and more delicious water. Usually, in a water purifier, removal of odor, musty odor, trihalomethane, and the like by an adsorbent such as activated carbon, and removal of bacteria, contaminants, and the like by a combined porous hollow fiber membrane are performed. And the cartridge which accommodated the filter medium is used for the water purifier from the ease of replacement | exchange of the filter medium when the purification capability falls.
[0003]
As this cartridge, there is known a double-pipe structure cartridge in which a cylindrical case containing a filter medium is arranged inside a cylindrical housing, and a partition plate in which two to three types of filter medium are meshed in the case It is also known that they are stored separately. However, in the conventional cartridge, as shown in FIG. 3, the filter medium partition plate is set over the step of the step portion provided in the circumferential direction of the inner wall of the cylindrical case. It was not fixed.
[0004]
For this reason, if the filter media on the partition plate is not densely packed, the partition plate will be displaced during handling such as transportation and transportation of the cartridge, during initial water flow, etc., and the filter media will leak and be mixed into other filter media However, there has been a situation where satisfactory filtration performance is not exhibited. In the manufacture of the cartridge, it is difficult to pack the filter medium densely, and it is not preferable to pack the filter medium densely because the water flow resistance of the filter medium filling portion increases and the purified water flow rate decreases.
[0005]
[Problems to be solved by the invention]
An object of this invention is to provide the cartridge for water purification which does not have a shift | offset | difference of a filter media partition plate, prevents mixing with the other filter media by the leak of a filter media, and exhibits the filtration performance of each filter media satisfactorily.
[0006]
[Means for Solving the Problems]
The present invention is 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 inside a cylindrical housing is provided, and the filter medium partition plate is cylindrical The cartridge for water purification is characterized by being fixed by a step portion and a plurality of protrusions respectively provided in the circumferential direction of the inner wall of the case.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a longitudinal sectional view of an example of the 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 discharge port, 7 is a filter media partition plate, 8 Represents a stepped portion, and 9 represents a protruding portion.
[0008]
The cartridge of the present invention has a double-pipe structure in which a cylindrical case containing a filter medium is arranged inside a cylindrical housing, and the inner wall of the case arranged inside the housing has a circumferential shape. A step and a plurality of protrusions are provided in each direction, and the filter medium partition plate is sandwiched and fixed between the step and the protrusions by the step and the plurality of protrusions.
[0009]
In the case, an adsorbent serving as a filter medium and a hollow fiber membrane are separated and stored by a filter medium partition plate. The step provided on the inner wall of the case is formed by differentiating the inner diameter of the case at the boundary between the adsorbent accommodating portion and the hollow fiber membrane accommodating portion, preferably the adsorbent accommodating portion on the upstream side and the hollow fiber membrane on the downstream side. A 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 of 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 of 0.5 to 2 mm is provided at a step.
[0010]
Further, the protrusion provided on the inner wall of the case is for preventing the displacement of the filter medium partition plate spanning the step of the step part, and is formed at an interval corresponding to the thickness of the filter medium partition plate. The protrusions are formed of the same or different material as 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 are preferably arranged at equal intervals in the circumferential direction of the case inner wall. 6 pieces are provided.
[0011]
The filter medium partition plate separates the adsorbent of the filter medium and the hollow fiber membrane, and is provided with a mesh that allows water to pass through. It is comprised with the material which has the intensity | strength which can endure the water pressure of time, Preferably it comprises with a thickness of 1-3 mm with a polypropylene resin.
[0012]
As the adsorbent used as the filter medium, 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 can be applied as it is.
[0013]
Further, the housing for housing the filter medium is made of a synthetic resin such as ABS or a metal such as stainless steel, and the material is not particularly limited. The cartridge of the present invention may be attached to a water purifier, or may be a water purifier main body provided with a raw water inlet and a purified water discharge outlet in a housing.
[0014]
【Example】
Referring to FIG. 1, the ABS resin housing 3 of the cartridge is a cylindrical shape having a diameter of 55 mm and a height of 105 mm. In FIG. 1, the raw water inlet 5 is provided 30 mm above the bottom. A purified water discharge port 6 is provided at the bottom. Inside the housing 3, a cylindrical ABS resin case 1 having filter media 2 a and 2 b is sealed and fixed by an O-ring 4 to form a double tube structure cartridge.
[0015]
In the case 1, four step portions 8 having a step of 1 mm and four protrusion portions 9 having a width of 5 mm, a thickness of 2 mm, and a protrusion length of 1 mm are provided on the inner wall at equal intervals in the circumferential direction. The filter medium partition plate 7 was made of polypropylene resin to a thickness of 2 mm. Case 1 accommodates 0.15 m ² of a polyethylene hollow fiber membrane (Mitsubishi Rayon Co., Ltd.) as a hollow fiber membrane 2b on the downstream side in a membrane area, and a filter medium partition plate 7 is fixed by a step 8 and a projection 9. The adsorbent 2a was filled with 21 g of granular activated carbon. As a comparison, the activated carbon 2a and the hollow fiber membrane 2b were housed in the case 1 without the protrusion 9 shown in FIG.
[0016]
The two types of cartridges were placed sideways on a horizontal vibrator having a frequency of 60 Hz and an amplitude of 1 mm, and were vibrated for 1 hour. Thereafter, raw water with a water temperature of 25 ° C. and a residual chlorine concentration of 2 ppm is passed through the cartridge while adjusting the original pressure so that the discharge rate of 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 until it was measured was 2200 liters in the comparative cartridge, it was 2400 liters in the cartridge of the present invention, resulting in a 9% processing capacity difference.
[0017]
【The invention's effect】
The cartridge for water purification of the present invention does not shift the partition plate at the time of handling, initial water flow, 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 exhibited sufficiently well. According to the water purifier equipped with the cartridge of the present invention, safe and delicious water can be obtained from tap water over a long period of time.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an example of a water purification cartridge of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a longitudinal sectional view of an example of a conventional water purification cartridge.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical case 2a Adsorbent 2b Hollow fiber membrane 3 Cylindrical housing 4 O-ring 5 Raw water inflow port 6 Purified water discharge port 7 Filter material partition plate 8 Step part 9 Protrusion part

Claims (3)

A cartridge for water purifier in which a cylindrical case in which an adsorbent as a filter medium and a hollow fiber membrane are housed is disposed inside a cylindrical housing ,
The cylindrical case is composed of a single member, and the adsorbent as a filter medium and the hollow fiber membrane are separated and stored in the case by a flexible filter medium partition plate. A cartridge for a water purifier, wherein the cartridge is fixed by a step portion and a plurality of projection portions provided in the circumferential direction of the inner wall of the case .   The cartridge for water purification according to claim 1, wherein the filter medium partition plate is made of polypropylene resin.   The cartridge for water purification according to claim 1 or 2, wherein the step inside the cylindrical case is in the range of 0.5 to 2 mm, and the thickness of the filter medium partition plate is in the range of 1 to 3 mm.

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