JPH0994569A - Water purifying cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To well issue purified water after passed through a water purifying filter material, in a water purifying cartridge having a double pipe structure in a filter case, by arranging the filter case in a cartridge main body in an eccentric state. SOLUTION: When raw water 18 is supplied from a raw water inflow port 15 in a water purifying cartridge 10, raw water 18 passes through the gap 17 between a cartridge main body 12 and a filter case 13. At this time, since the width of the gap on the side of the raw water inflow port 15 is larger than that of the gap on the side opposite to the raw water inflow port 15, raw water 18 passes through the gap smoothly to pass through a water purifying filter material 14, and residual chlorine, other malodorous component and an org. substance contained in raw water are removed by the active carbon bed 14a of the water purifying filter material 14, and further, iron rust, colloid components and bacteria hardly removed by chlorine sterilization are removed by hollow yarn membranes 14b and safe and palatable purified water 19 is emitted from a purified water emitting port 16.

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 used in a general household water purifier for the purpose of filtering purified tap water.

[0002]

2. Description of the Related Art In recent years, environmental pollution of water resources has attracted attention, and drinking water is no exception to pollution, and water purifiers for purifying tap water have been widely used. These water purifiers mainly remove adsorbents such as activated carbon to remove odors of water, musty odors, trihalomethanes, etc., and use a porous hollow fiber membrane to remove bacteria, turbidity components, and the like.
By the way, in these water purifiers, it is necessary to replace the filter medium with a new one as the water purifying ability is deteriorated. Usually, the filter medium is made into a cartridge and provided in the water purifier as a water cartridge.

FIG. 3 is a vertical sectional view showing an example of a conventional water purification cartridge. Reference numeral 1 in the drawing is a conventional water purification cartridge. 4 is a cross-sectional view of the water purification cartridge of FIG. 3 taken along the line AA. The conventional water purification cartridge 1
Cylindrical cartridge body 2 and the cartridge body 2
As shown in FIG. 4, it has a double tube structure which is roughly composed of cylindrical cases 3 which are concentrically arranged with a gap 7 therebetween.
The inside of the cylindrical case 3 is generally filled with a water purifying filter 4 comprising an activated carbon layer 4a and a hollow fiber membrane 4b below the activated carbon layer 4a. Further, a raw water inlet 5 for introducing raw water into the inside is provided on the side surface of the cartridge body 2, and a purified water discharge port 6 for discharging the purified water to the outside is provided at the bottom. This water purification cartridge 1
Then, the size of the width W ₁ of the gap 7a formed on the raw water inlet 5 side and the width W of the gap 7b formed on the opposite side of the raw water inlet 5 side.
The sizes of ₂ are approximately 1 mm, and are equally spaced.

In such a water purification cartridge 1, when the raw water 8 flows in from the raw water inlet 5, the raw water 8 passes through the gap 7 between the cartridge body 2 and the cylindrical case 3, and then the water purification filter 4 is passed through. Residual chlorine, other odorous components and organic substances contained in the raw water 8 are removed by the activated carbon layer 4a of the water purifying filter 4, and the hollow fiber membrane 4b further removes iron rust, colloidal components and chlorine sterilization. Bacteria that are difficult to remove are removed, and safe and delicious purified water 9 is discharged from the purified water discharge port 6.

[0005]

However, in the conventional water purification cartridge 1 having the above-described structure, the raw water inlet 5 has to be arranged at the lower portion of the side surface of the cartridge body 2 due to the design of the water purifier or the like. In this case, the raw water 8 flowing into the water purification cartridge 1 flows through the gap 7 between the cartridge body 2 and the cylindrical case 3, but the water purification cartridge 1
Of the raw water inflow port 5 with the center axis G ₁ (the point where the center axis of the cartridge body 2 and the center axis of the cylindrical case 3 coincide) as the axis of symmetry.
The raw water 8 stays in the gap 7b opposite to the side gap 7a,
There was a problem that the raw water 8 was difficult to flow.

As described above, the water purification cartridge having a structure in which the raw water 8 does not easily flow is inefficient from a hydrodynamic point of view, and it is necessary to improve the structure so that the raw water 8 can flow more effectively. There is.

In view of the above problems, the present invention provides a water purification cartridge capable of efficiently flowing raw water into a gap in the water purification cartridge and having a good output of the purified water after passing through the filtration material for water purification. With the goal.

[0008]

According to a first aspect of the present invention, a tubular filter case having a filter medium for water purification filled therein is provided in a tubular cartridge body with a gap therebetween. A water purification cartridge having a heavy pipe structure, wherein the filtration case is eccentrically arranged in the cartridge body, and is a means for solving the problems. According to the invention of claim 2, in the water purification cartridge of claim 1, the cartridge body is provided with a raw water inlet for guiding the raw water into the inside of the lower side surface thereof, and the purified water is led to the outside at the bottom. There is a purified water discharge port for the cartridge body, and the width of the gap between the cartridge body on the raw water inlet side and the filtration case with the central axis of the cartridge body as the axis of symmetry is opposite to the raw water inlet side. The width of the gap between and was set as the means for solving the above problems. Further, in the invention of claim 3, in the water purification cartridge according to claim 2, the width of the gap between the cartridge body on the raw water inlet side and the filtration case is set to 2 mm or more.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An example of a water purification cartridge of the present invention will be described below with reference to the drawings. 1 is a vertical sectional view showing an example of the water purification cartridge of the present invention.
Is a cross-sectional view of the water purification cartridge of FIG. 1 taken along line BB,
Reference numeral 10 in the figure is a water purification cartridge. The water purification cartridge 10 has a double tube structure that is roughly configured by a cylindrical cartridge body 12 and a cylindrical filtration case 13 eccentrically arranged in the cartridge body 12.

The cylindrical cartridge main body 12 used in the present invention has a cylindrical filtration case 13 in the inside thereof with a gap 1.
7 is vacant and stored, for example, a housing,
Examples thereof include a cylindrical case, and examples of the material thereof include plastics such as ABS and metals such as stainless steel. As the shape of the cartridge body 12, for example, a cylindrical shape, a square pipe shape, or the like is preferably used.

A raw water inflow port 15 for introducing the raw water 18 into the inside thereof is provided at the lower portion of the side surface of the cartridge body 12, and the shape thereof which is conventionally used can be used as it is. Further, the bottom of the cartridge body 12 is provided with a purified water discharge port 16 for leading the purified water 19 to the outside.

In such a cartridge body 12,
A cylindrical filtration case 13 is eccentrically arranged. In this example, the position of the central axis G ₃ of the filtration case 13 is greater than the position of the central axis G ₂ of the cartridge body 12 in the raw water inlet port 15.
The width W ₃ of the gap 17a on the side of the raw water inlet 15 is wider than the width W ₄ of the gap 17b on the side opposite to the raw water inlet 15 with the center axis G ₂ of the cartridge body 12 as the axis of symmetry. Has become.

Width W of the gap 17a on the raw water inlet 15 side
₃ is preferably at least 2 mm or more when the inner diameter of the cartridge body 12 is 56 mm and the outer diameter of the filtration case 13 is 53 mm, and at this time, the inner surface of the cartridge body 12 on the side opposite to the raw water inlet 15 is filtered. There is no problem even if the case 13 is in contact (the width W ₄ of the gap 17b on the side opposite to the raw water inlet 15 is 0 mm). When the width W _{3 of the} gap 17a is less than 2 mm, the raw water inlet 1
5, the width W ₄ of the gap 17b on the side opposite to 5 becomes wider,
This is because the raw water 18 stays in b and the flow of the raw water 18 becomes worse.

The inside of such a filter case 13 is filled with a filter material 14 for water purification. As the filter material 14 for water purification, conventionally used materials such as activated carbon, ion exchange resin, ceramics and hollow fiber membranes can be used as they are. In this example, the activated carbon layer 14a and the hollow fiber membrane 14b are used. The hollow fiber membrane 14b is arranged below the activated carbon layer 14a so as to be connected to the purified water discharge port 16 side.

Examples of the material of the hollow fiber membrane 14b include polymeric materials such as silicone type, polyolefin type, polyester type, polyamide type, polysulfone type, cellulose type and polyurethane type. The hollow fiber membrane 14b has an outer diameter of 10 to 5000 μm and a porosity of 1
Those having a pore size of 0 to 90% and a pore size of 0.01 to 1 μm are preferable.

Filtration case 13 for cartridge body 12
For fixing, the conventional method such as using an O-ring or ultrasonic welding can be used as it is. In this example, the O-ring 2
It is fixed by 0. In this example, the cartridge body 12 and the filtration case 13 are separate, but they may be of integral structure.

In the water purification cartridge 1 having such a structure, when the raw water 18 is supplied from the raw water inlet 15, the raw water 18 passes through the gap 17 between the cartridge body 12 and the filtration case 13. At this time, Since the width W ₃ of the gap 17a on the side of the raw water inlet 15 is wider than the width W ₄ of the gap 17b on the side opposite to the side of the raw water inlet 15, the raw water 18 passes through the gap 17a smoothly and then for purification. Filtering material 14
The residual chlorine, other odorous components and organic substances contained in the raw water 18 are removed by the activated carbon layer 14a of the water purifying filter 14, and the hollow fiber membrane 14b further sterilizes iron rust, colloidal components and chlorine. , Bacteria that are difficult to remove are removed, and safe and delicious purified water 9 is discharged from the purified water discharge port 6.

In the water purification cartridge 10 of this example, the width W ₃ of the gap 17a on the raw water inlet 15 side is made wider than the width W ₄ of the gap 17b on the side opposite to the raw water inlet 15 side. 18 is a gap 17a on the raw water inlet 15 side
Of the raw water 18 because the raw water 18 is less likely to stay in the gap 17b on the side opposite to the raw water inlet 15 side.
8 flows efficiently to reach the purified water filter medium 14, and the purified water 19 after passing through the purified water filter medium 14 becomes excellent.
Therefore, according to the water purification cartridge 10 of this example, it is not necessary to reduce the flow rate of the raw water 18 that reaches the water purification filter medium 14, and the user of the water purifier can instantly need a large amount of water purification such as washing vegetables. In this case, there is an advantage that the purified water 19 after passing through the filter medium 14 for purifying water is excellent, the practicality is excellent, and the user can use the purified water 19 with peace of mind without discomfort.

[0019]

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples. (Example) In the water purification cartridge of FIG. 1, the height of the cartridge body is 105 mm, the inner diameter is 56 mm, the position of the raw water inlet is 30 mm from the bottom of the cartridge body, the height of the filtration case is 90 mm, the outer diameter is 53 mm, and the center of the cartridge body 3m width of the gap on the raw water inlet side with the axis as the axis of symmetry
The width of the gap on the side opposite to the raw water inlet was 0 mm. The main material of the cartridge body is plastic, and the filter material for water purification filled in the filtration case is CW6100AGZ (trade name; manufactured by Nimura Chemical Co., Ltd.) as activated carbon 25 g, and EX270TS (trade name as hollow fiber membrane). Mitsubishi Rayon Co., Ltd.) 0.15 m ^{2 was} used to prepare a water purification cartridge. This water purification cartridge was used as the water purification cartridge of the example.

(Comparative example) The width of the gap on the raw water inlet side is 1 m.
m, a water purification cartridge was prepared in the same manner as in the above example except that the filtration case was concentrically arranged in the cartridge body so that the width of the gap on the side opposite to the raw water inlet was 1 mm. This water purification cartridge was used as a water purification cartridge of a comparative example.

(Experimental example) Next, an original pressure of 1 kg / c was applied to the prepared water purification cartridges of the above-mentioned examples and comparative examples.
Tap water was simultaneously passed from the same pipe outlet to the raw water inlet at m ² and a water temperature of 25 ° C., and the discharge amount of the purified water from the purified water outlet was examined. As a result, the water purification cartridge of the comparative example (conventional product)
Is 3.0 liters / minute, while the water purification cartridge of the embodiment (the product of the present invention) is 3.3 liters / minute, and therefore, the water purification cartridge of the embodiment is connected to the raw water inlet. It was confirmed that when the water flow rate was the same, the discharge rate was improved by 10% as compared with the conventional product, and a remarkable difference was observed in the output of purified water after passing through the filter material for water purification.

[0022]

As described above, in the water purification cartridge of the present invention, since the filtration case is eccentrically arranged in the cartridge body, the raw water smoothly passes through the gap between the cartridge body and the filtration case. In addition, since the raw water is less likely to stay, the raw water efficiently flows through the gap between the cartridge body and the filtration case to reach the clean water filter material, and the clean water is discharged after passing through the clean water filter material. Therefore, according to the water purification cartridge of the present invention, it is not necessary to reduce the flow rate of the raw water reaching the filter medium for water purification, and when the user of the water purifier instantly needs a large amount of water for washing vegetables, There is an advantage that the purified water comes out well after passing through the filter medium for water purification, is excellent in practicality, and allows the user to use the purified water without any discomfort.

[Brief description of drawings]

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

2 is a cross-sectional view of the water purification cartridge of FIG. 1 taken along the line BB.

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

4 is a sectional view of the water purification cartridge of FIG. 3 taken along the line BB.

[Explanation of symbols]

10 water purification cartridge 12 cartridge body 13 filtration casing 14 water purification filtering material 14a activated carbon layer 14b hollow fiber membranes 15 raw water flow inlet 16 purified water discharge port 17 gap 17a gaps 17b gap W ₃ width W ₄ width 18 raw 19 water purifier G ₂ central axis G ₃ center axis 20 O-ring

Claims (3)

[Claims] 1. A water purification cartridge having a double tube structure, wherein a tubular filtration case filled with a water purification filter is disposed inside a tubular cartridge body with a gap therebetween. A water purification cartridge, wherein the filtration case is eccentrically arranged in the cartridge body. 2. The cartridge main body is provided with a raw water inlet for guiding raw water into the inside of a lower portion of a side surface thereof and a purified water discharge outlet for discharging purified water to the outside at the bottom thereof. The width of the gap between the cartridge body on the raw water inlet side and the filtration case with the central axis as the axis of symmetry,
2. The water purification cartridge according to claim 1, wherein the water purification cartridge is wider than a gap between the cartridge case and the filtration case on the side opposite to the raw water inlet side. 3. The water purification cartridge according to claim 2, wherein the width of the gap between the cartridge body on the raw water inlet side and the filtration case is 2 mm or more.