KR19980067469A - Backwash type water purifier - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a backwash type water purifier that is a household water treatment apparatus for obtaining drinking water.

2. The technical problem to be solved by the invention

When the water purifier is not in use, all the water inside the water purifier can be removed and air can be introduced into the water purifier, which keeps the interior of the water purifier in an aerobic atmosphere where germs can't grow, resulting in unpleasant odors from the purified drinking water. Does not provide a backwash water purifier.

3. Summary of Solution to Invention

It consists of a main body and a cartridge, the cleaning liquid storage chamber 21 is installed in the upper end of the filter case of the cartridge so that the cleaning liquid stored in the cleaning liquid storage chamber 21 when the water purifier is washed back to clean the hollow fiber membrane.

4. Important uses of the invention

The backwash water purifier of the present invention is used for the purification of tap water to obtain drinking water.

Description

Backwash type water purifier

The present invention relates to a water purifier that is a domestic water treatment apparatus for obtaining drinking water.

As the industry develops, the quantitative increase of various pollutants is rapidly spreading, causing serious water quality problems for drinking water used as drinking water.

In particular, the contamination of domestic tap water by various bacteria, iron, rust and organic matter which are likely to be contained in domestic tap water is serious. The cause is due to the infiltration of organic matter as the water supply pipes supplied from the purified water to each household are old, or various infectious bacteria and bacteria such as E. coli, cholera, typhoid fever, and dysentery in the water storage tank. As such, the contaminated tap water may be unpleasant due to smell, or harmful to the human body.

In order to remove various contaminants in the drinking water, water purifiers employing filter cartridges in which an adsorption material such as activated carbon or activated carbon fiber and a hollow fiber membrane are combined are used.

In the case of such a filter cartridge in which activated carbon or activated carbon fiber and a hollow fiber membrane are combined, the treated water introduced into the water purifier is introduced into the hollow fiber membrane after passing through the activated carbon layer. The water to be treated on the surface of the hollow fiber membrane is present in the state containing almost no germicide component because it is adsorbed by activated carbon. Therefore, if a large amount of bacteria is present on the surface of the hollow fiber membrane depending on the quality of the water to be treated and the degree of use of the water purifier, a substance that generates an unpleasant odor may be generated.

Examples of the substance that generates such an odor include hydrogen sulfide generated by an anti-acid reduction bacterium, and the bacterium grows in an anaerobic atmosphere.

There is a certain amount of oxygen dissolved in the tap water. When using the water purifier, oxygen is supplied into the water purifier through the tap water, so the inside of the water purifier becomes an aerobic atmosphere, but when the water purifier is not used, oxygen is not supplied through the tap water. Because of the lack of oxygen in the water purifier, anaerobic bacteria, such as sulfate reducing bacteria to grow.

In order to suppress the growth of such anaerobic bacteria, the interior of the water purifier should be made into an aerobic atmosphere. For this reason, when the water purifier is stopped without using the water purifier, all water in the water purifier must be removed and air can be introduced.

The water purifiers employing filter cartridges in which the adsorption material and the hollow fiber membrane are used up to now are located at the bottom of the filter case.

Therefore, when the purified water is finished, the water remaining inside the hollow fiber membrane is washed out through the raw water discharge port, but the hollow fiber membrane is washed. At this time, water or contaminants remaining on the surface of the hollow fiber membrane are not efficiently removed. As a result, air does not flow into the water purifier when the water purifier is stopped, and thus the inside of the water purifier has a problem of becoming an anaerobic atmosphere in which bacteria and the like can proliferate.

In order to solve the problem of the conventional water purifier, the cleaning liquid storage chamber is installed at the upper end of the filter case and the cleaning liquid stored in the water purifier cleaning liquid storage chamber is flowed back to efficiently remove water in the water purifier and at the same time, air can be introduced into the water purifier. The purpose of the present invention is to provide a backwash type water purifier capable of maintaining the interior of the water purifier in an aerobic atmosphere in which bacteria and the like cannot reproduce.

1 is a front cross-sectional view of the water purifier according to the present invention,

2 is a plan view of the cartridge in the water purifier according to the present invention.

* Description of the symbols for the main parts of the drawings *

2: cartridge 3: body

4: faucet connection part 5: raw water discharge outlet

6: Water flow selection lever 7: Water flow control valve

8: first treated water inlet 9: second treated water inlet

10: third treated water inlet 11: fourth treated water inlet

12: 1st washing water discharge outlet 13: 2nd washing water discharge outlet

14: third washing water discharge outlet 15: fourth washing water discharge outlet

16: clear water outlet 17: clear water outlet

18: filter case 19: hollow fiber membrane module

20: adsorption material storage room 21: washing liquid storage room

22: hollow fiber membrane 23: adhesive fixing member of the hollow fiber membrane

24: adsorption material 25: cleaning liquid

26: antibacterial belt 27: sintered filter

28: screen filter

The present invention relates to a household water purifier for obtaining drinking water.

Specifically, in the water purifier consisting of a cartridge which is connected to the main body having a faucet connection portion and the raw water outlet vertically and containing a filter, the washing liquid storage chamber 21 is located at the upper end of the filter case 18 of the cartridge 2, A backwash water purifier characterized in that the hollow fiber membrane is washed while the washing liquid 25 stored in the washing liquid storage chamber 21 flows back during the washing.

The backwash type water purifier of the present invention efficiently washes the hollow fiber membranes by flowing the cleaning liquid in the cleaning liquid storage chamber 21 installed at the upper end of the filter case 18 to efficiently remove water remaining in the water purifier and allow air to flow into the water purifier. As a result, the inside of the water purifier can be prevented from forming a substance that maintains an aerobic atmosphere in which bacteria cannot grow and generates an unpleasant odor.

The present invention will be described in more detail with reference to the drawings.

1 is a front sectional view of the water purifier of the present invention, and FIG. 2 is a plan view of the cartridge in the water purifier of the present invention.

The water purifier of the present invention comprises a main body 3 and a cartridge 2 vertically connected to the main body. The main body is composed of a faucet connection (4), raw water discharge port (5), water flow selection rubber (6), water flow control valve (7), fourth wash water discharge port (15) and the first treated water inlet (8), The cartridge 2 is composed of a filter case 18, a third cleansing water discharge port 14, a second to-be-treated water inlet 9, a purified water outlet passage 17 and a purified water outlet 16.

The filter case 18 is composed of a hollow fiber membrane module 19, the adsorption material storage chamber 20, the cleaning liquid storage chamber 21, the second washing water discharge port 13 and the third treated water inlet (10). In addition, the hollow fiber membrane module 19 is composed of the first washing water discharge port 12, the fourth treated water inlet 10, the hollow fiber membrane 22 and the hollow fiber membrane adhesive fixing member 23.

In the water purifier of the present invention, the fourth washing water discharge outlet 15 of the main body 3, the third washing water discharge outlet 14 of the cartridge 2, the second washing water discharge outlet 13 of the filter case 18, and The first washing water discharge ports 12 of the hollow fiber membrane module 19 are adjacent to each other, and the first treated water inlet 8 of the main body 3 and the second treated water inlet of the cartridge 2 are connected. (9) and the third to-be-treated water inlet 10 of the filter case 18 are mutually adjacent and connected.

In the water purifier according to the present invention, the treated water entering the third treated water inlet 10 of the filter case 18 through the second treated water inlet 9 of the cartridge 2 is adsorbed material storage chamber 20 After the chlorine component and the odor are sufficiently removed by the activated carbon of), it is introduced into the hollow fiber membrane module 19 via the fourth treated water inlet 11 located above the hollow fiber membrane module 19. After the microorganisms and various germs are sufficiently removed from the hollow fiber membrane 22, they are discharged to the purified water discharge port 16 through the washing liquid storage chamber 21. At this time, a part of the purified water that has passed through the hollow fiber membrane 22 remains in the washing liquid storage chamber 21 and is used for backwashing microorganisms and germs stuck to the surface of the hollow fiber membrane 22 and finally discharged to the outside through the washing water discharge port. .

In FIG. 1, the water purifier main body 3 is detachable to the faucet through the faucet connection part 4, and the main body 3 is a raw water discharge port 5 extending substantially vertically downward from the faucet connection part 4. Have A water flow control valve 7 is located between the faucet connection 4 and the raw water discharge port 5, which is operated by the water flow selection lever 6 and is rotated in the axial direction. The flow of water from the faucet connection part 4 to the raw water discharge port 5 from the first treated water inlet 8 or the fourth washing water discharge port 15 is made. That is, when the water flow selection lever 6 is in the purified state, the water flow control valve 7 connects the faucet connecting portion 4 and the first treated water inlet 8, and when the water flow selection lever 6 is in the raw water state. When the faucet connection part 4 and the raw water discharge port 5 are connected by the water flow control valve 7, and the water flow selection lever 6 is washed, the fourth washing water discharge port 15 is discharged by the water flow control valve 7. And raw water discharge outlet 5 are connected.

The longitudinally cylindrical cartridge 2 is mounted to be detachable from the main body 3. On the lower side of the portion where the cartridge 2 and the main body 3 are connected, there is a second treated water inlet 9 at a portion connected to the first treated water inlet 8 of the main body 3 so that the main body 3 The water to be treated may be introduced into the cartridge 2. In the upper part of the second to-be-treated water inlet 9, there is a third wash water discharge outlet 14 connected to the fourth wash water discharge outlet 15 of the main body 3 so that the washing water used for backwashing the hollow fiber membrane 22 is the main body. To be discharged to (3).

The cylindrical cartridge 2 is composed of a cylindrical filter case 18 and a cylindrical water purification outlet passage 17. The filter case 18 and the purified water outlet passage 17 are located eccentrically in the cartridge 2, respectively. The filter case 18 is located on the side of the second to-be-treated water inlet 9 of the cartridge 2, and the purified water outlet passage 17 is opposite to the filter case 18. The purified water discharge port 16 is provided at the lower end of the purified water outlet passage 17.

The filter case 18 is comprised of the hollow fiber membrane module 19, the adsorption material storage chamber 20, and the washing | cleaning liquid storage chamber 21. As shown in FIG. The lower end of the filter case 18 is provided with a third treated water inlet 10 for receiving the treated water introduced from the cartridge 2 and connected to the second treated water inlet 9 of the cartridge 2. The upper part has a second washing water discharge port 13 and is connected to the third washing water discharge port 14 of the cartridge 2.

The hollow fiber membrane module 19 is eccentrically formed on the second washing water discharge port 13 side of the filter case 18, and its bottom surface is formed with the third treated water inlet 10 of the filter case 18. It is configured so as to be between the second washing water discharge port 13, the lower part of the filter case 18 is connected to the second washing water discharge port 13, the first washing water discharge port 12 and the opposite side There is a fourth treated water inlet 11.

In the hollow fiber membrane module 19, the hollow fiber membrane 22 is bonded in a U shape. On the upper side of the hollow fiber membrane module 19 is an adhesive fixing member 23 for fixing the hollow fiber membrane 22, the water to be treated is purified by passing through the surface of the hollow fiber membrane 22, the purified water is hollow fiber membrane module It will take the form of gathering on the top of (19).

The fourth to-be-processed water inlet 11 of the hollow fiber membrane module 19 is located on the upper side opposite to the first washing water discharge port 12, so that it can occupy more than the radius of the hollow fiber membrane module 19 so that the hollow fiber membrane The filter of the hollow fiber membrane 22 is made to facilitate the flow of the water to be flowed into the module 19 and the inlet is constituted by the sintered filter 27 so that the particulates in the water to be treated are primarily filtered. Maximize the effect.

The adsorption material storage chamber 20 has a lower side of the filter case 18, which is a space between the hollow fiber membrane module 19 and the filter case 18, and an opposite side of the second washing water discharge port 13 side of the filter case 18. Adsorbed material 24, such as activated carbon, is filled in the inside of the filter case 18 so that the chlorine component and odor component in the treated water introduced into the third treated water inlet 10 of the filter case 18 are sufficiently removed. Then, the water flows into the fourth treated water inlet 11 of the hollow fiber membrane module 19.

The cleaning solution storage chamber 21 is formed at the upper end of the filter case 18 and positioned above the adhesive fixing member 23 of the hollow fiber membrane module 19. An antimicrobial belt 26 made of an antibacterial material is installed inside the cleaning liquid storage chamber 21 to prevent bacterial penetration of the cleaning liquid 25. In such a water purifier, when the water flow selection lever 6 of the main body 3 is brought into a purified state, the faucet connecting portion 4 and the first water inlet 8 are connected by the water flow control valve 7 to treat the water of the faucet. The suction material storage chamber 20 of the lower and side surfaces of the filter case 18 through the second treated water inlet 9 of the cartridge 2 and the third treated water inlet 10 of the filter case 18. After the chlorine component or odor component in the treated water is sufficiently removed, the fine particles are filtered through the fourth inlet 11 of the hollow fiber membrane module 19, and the hollow fiber membrane module 19 Flows into). The to-be-processed water introduced into the hollow fiber membrane module 19 is again filtered by the hollow fiber membrane 22 to be collected in the cleaning solution storage chamber 21 located above the filter case 18. The purified water collected in the washing liquid storage chamber 21 overflows when the purified water amount of the washing liquid storage chamber 21 is collected and is discharged to the purified water discharge port 16 through the purified water outlet passage 17 located on the opposite side of the filter case 18.

When the water flow selection lever 6 of the main body 3 is cleaned, the faucet connecting portion 4 and the first water inlet 8 are blocked by the rotational movement of the water flow control valve 7, and the fourth washing water discharge port is blocked. 15 and the raw water discharge port 5 is connected. At this time, no further purified water is produced, and a state in which purified water remains temporarily in the cleaning liquid storage chamber 21 between the purified state and the cleaned state, and this purified water serves as the cleaning liquid 25. In the cleaning state, since the fourth washing water discharge port 15 and the raw water discharge port 5 are connected, air is introduced into the water purifier so that the cleaning liquid 25 in the cleaning liquid storage chamber 21 flows in the opposite direction to the clean water. , From the inner surface of the hollow fiber membrane 22 to the outer surface. By this flow, the bacteria stuck to the outer surface of the hollow fiber membrane 22 are fixed. The washing water flowing out while leaving the bacteria on the surface of the hollow fiber membrane 22 flows into the first washing water discharge port 12 located at the lower end of the hollow fiber membrane module 19 to discharge the second washing water discharge port of the filter case 18 ( 13) and the third washing water discharge outlet 14 of the cartridge 2 and the fourth washing water discharge outlet 15 of the main body 3 are discharged to the raw water discharge opening 5. At this time, since the antimicrobial belt 26, which is an antimicrobial material, was used inside the cleaning solution storage chamber 21 to prevent the mixing of bacteria as the inner surface of the hollow fiber membrane 22, there is no fear of mixing of bacteria in the purified water. .

When the water flow selection lever 6 of the main body 3 is in the raw water state, the fourth washing water discharge port 15 and the raw water discharge port 5 are blocked by the rotational movement of the water flow control valve 7, and further washing water is discharged. Only the tap water in the tap is discharged.

The present invention will be described in more detail with reference to Examples and Comparative Examples.

Example 1

A water purifier is prepared in the present invention having a backwashing function using a hollow fiber membrane having a pure water permeability coefficient of 1 ml / cm 2 · min · kg / cm 2 and activated carbon having a particle size of 40 mesh. Install this water purifier in your home faucet and use it. After 1 month of installation, the external surface of the hollow fiber membrane in the water purifier was taken to check the number of bacteria stuck to the external surface of the hollow fiber membrane, and the result of measuring the instantaneous flow rate change of the water purifier while using it for 6 months is shown in Table 1. .

Comparative Example 1

A water purifier having no backwashing function was prepared using a hollow fiber membrane having a pure water permeability coefficient of 1 ml / cm 2 · min · kg / cm 2 and activated carbon having a particle size of 40 mesh.

Install this water purifier in your home faucet and use it. After 1 month of installation, the outer surface of the hollow fiber membrane in the water purifier was taken to check the number of bacteria stuck to the outer surface of the hollow fiber membrane, and the result of measuring the instantaneous flow rate change of the water purifier while using it for 6 months is shown in Table 1. .

Table 1 Measurement Results

The backwash type water purifier of the present invention flows back the cleaning liquid remaining in the cleaning liquid storage chamber installed at the upper end of the filter case to clean the hollow fiber membrane, thereby efficiently discharging water inside the water purifier and simultaneously introducing air into the water purifier. Thus, the inside of the water purifier is maintained in an aerobic atmosphere where bacteria cannot grow. As a result, there is no bacteria on the surface of the hollow fiber membrane, so there is no unpleasant smell in the purified water, and the instantaneous flow rate change of the water purifier is small, so that the water purifying capacity can be maintained in a good state for a long time compared to the conventional water purifier.

Claims (8)

In a water purifier consisting of a cartridge having a faucet connection part and a main body having a raw water discharge port and having a built-in filter, a washing liquid storage chamber 21 is positioned at the upper end of the filter case 18 of the cartridge 2, and the washing liquid is cleaned when the water purifier is cleaned. A backwash type water purifier, characterized in that the hollow fiber membrane is washed while the washing solution stored in the storage chamber (21) flows backward. The backwash type water purifier according to claim 1, wherein an antibacterial belt (26) is installed inside the cleaning liquid storage chamber (21). The main body (3) according to claim 1, wherein the main body (3) includes a faucet connection (4), a raw water discharge port (5), a water flow selection lever (6), a water flow control valve (7), a fourth wash water discharge port (15), and a first treated water supply. Backwash water purifier, characterized in that consisting of the inlet (8). The cartridge (2) according to claim 1, wherein the cartridge (2) is composed of a filter case (18), a third clean water discharge port (14), a second treated water inlet port (9), a purified water outlet passage (17), and a purified water discharge port (16). Backwash type water purifier characterized by the above-mentioned. The filter case (18) according to claim 1 or 4, wherein the filter case (18) includes a hollow fiber membrane module (19), an adsorption material storage chamber (20), a cleaning liquid storage chamber (21), a second washing water discharge port (13), and a third treated water inlet port. Backwash type water purifier, characterized in that consisting of (10). The hollow fiber membrane module (19) according to any one of claims 1 to 5, wherein the hollow fiber membrane module (19) is composed of a first washing water discharge outlet (12), a fourth treated water inlet (10), a hollow fiber membrane (22), and a hollow fiber membrane adhesive fixing member (23). Backwash type water purifier, characterized in that. The fourth washing water discharge outlet 15 of the main body 3, the third washing water discharge outlet 14 of the cartridge 2, the second washing water discharge opening 13 of the filter case 18, and the hollow fiber membrane. A backwash type water purifier, characterized in that the first washing water discharge ports (12) of the module (19) are adjacently connected to each other. 2. The first treated water inlet 8 of the main body 3, the second treated water inlet 9 of the cartridge 2, and the third treated water inlet 10 of the filter case 18. Backwash type water purifier, characterized in that adjacent to each other connected.