KR20140016857A - Water treatment method - Google Patents

Abstract

The present invention provides a water treatment method capable of supplying clean water by sterilizing a filtering membrane as well as the inside of a water tank using sterilizing water. The water treatment method of the present invention comprises: a) a step for draining water inside a storage unit which stores water filtered by a filtering unit; b) a step for sterilizing the storage unit by supplying the sterilizing water; and c) a step for draining the sterilizing water in the storage unit to the outside. A drain line for draining the sterilizing water includes a drain pump which detects a load change and determines the finish of a draining process.

Description

{WATER TREATMENT METHOD}

The present invention relates to a water treatment method, and more particularly, to a water treatment method capable of sterilizing a water tank and an inside of a pipe using sterile water.

As water pollution due to industrial development becomes serious, distrust in tap water increases, and recently, purified water with a water purifier is used as drinking water or commercially available bottled water as drinking water.

The water purifier is made to remove heavy metals and other harmful substances contained in the raw water through the process of sedimentation, filtration, sterilization, and adsorption of raw water such as tap water, and the like. It is also widely used for cleaning or medical use of high precision electronic components.

The conventional water purifier includes a raw water valve for controlling the supply of raw water such as tap water and natural water, a pretreatment sedimentation filter for filtering the debris in the raw water that has passed through the raw water valve, A post-carbon filter for removing chlorine components and odors contained in purified water passing through the pre-carbon filter, and a hollow fiber filter for removing bacteria and other fine particles contained in purified water passing through the post- And a water tank for storing purified water that has passed through the hollow fiber membrane filter.

In general, in the water treatment plant, a chlorine-based sanitizing disinfectant is administered to suppress the growth of microorganisms in the water. While the tap water to which the sanitizing disinfectant is administered passes through the water purifier, chlorine is removed from the free carbon filter and the post- .

Since the chlorine component that suppresses the growth of microorganisms is removed by the filter, the purified water stored in the water tank is not used immediately by the consumer, and bacteria proliferate inside the water tank after a long time elapses Various methods have been proposed for the sterilization of these water tanks.

For example, Korean Patent Registration No. 10-621937 discloses a technique for sterilizing the inside of a purified water tank by providing an electrolytic sterilizing means between the filter portion and the purified water tank for sterilizing purified water by electrolysis and producing an oxidizing mixed material.

However, the bacteria that are generated due to the long unused use of the purified water are proliferated not only in the water tank but also in the filter membrane of the filter unit. In the above-mentioned conventional technology, the bacteria remaining in the filter membrane can not be sterilized there was.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a water treatment method capable of supplying cleaner water by sterilizing not only the inside of the water tank but also the filter membrane using sterilizing water.

The water treatment method of the present invention for achieving the above object comprises the steps of: a) draining the water inside the reservoir where the filtered water is stored through the filter; b) sterilizing by supplying sterilized water to the storage unit; c) draining the sterilizing water inside the storage unit to the outside; a drainage line is provided in the drainage line through which the sterilizing water is drained, and determines whether the drainage is completed by detecting a load change in the draining pump. It consists of doing

The filter unit is composed of a plurality of filters including a hollow fiber membrane filter; The sterilization module for supplying the sterilizing water may be provided at the front end of the hollow fiber membrane filter.

The storage unit is composed of a first storage tank and a second storage tank for storing water of different temperatures, when supplying sterilized water to the storage when the water level sensor provided in the first storage tank detects the high water level It can be determined that the sterilizing water filled in the first storage tank and the second storage tank is full water level.

The sterilized water drained from the reservoir may be discharged to the outside through a water intake line connecting the reservoir and the intake valve.

A sterilization water line is provided in which a sterilization module for supplying the sterilization water is connected in parallel with the purified water transfer line and the purified water moving line connecting the respective filters of the filter unit. After draining to the outside may be supplied with rinsing water through the purified water moving line and the sterilization water line.

The storage unit includes a first storage tank and a second storage tank for storing at different temperatures, the drain line is a first drain line for draining the sterilized water filled in the first storage tank and the second storage tank, respectively And a second drainage line.

The storage unit includes a first storage tank and a second storage tank for storing at different temperatures, and the drain line is a first drain line for draining sterilized water filled in the first storage tank and the second storage tank. It may be made.

The load change of the drain pump may be a change in current or voltage.

According to the present invention, since sterilizing module is provided at the front end of the hollow fiber membrane filter, the germicidal material generated in the sterilizing module sterilizes the germs grown in the filter membrane of the hollow fiber membrane filter and sterilizes the inside of the storage tank, Can supply.

In addition, the drainage line for draining sterilization water is branched right before the intake valve installed on the intake line for supplying purified water to the user and drained to the outside. The area of the dead zone that is not sterilized can be minimized.

In addition, a sterilizing module is installed on the sterilizing water line connected in parallel with the water movement line, and the sterilizing module generated by the sterilizing module and the sterilizing material contained in the raw water are added by supplying the sterilizing module with water not having passed the carbon filter, The sterilizing effect of the storage tank and the water intake line can be improved by increasing the sterilizing substance concentration.

Also, by connecting one drainage line to two storage tanks to make drainage, the piping structure can be simplified.

1 is a view showing a configuration of a water treatment apparatus according to a first embodiment of the present invention,
2 is a view showing an operating state when draining in the water treatment apparatus according to the first embodiment of the present invention,
3 is a view showing a sterilizing water inflow process in the water treatment apparatus according to the first embodiment of the present invention,
4 is a view showing a sterilization water draining process in the water treatment apparatus according to the first embodiment of the present invention;
5 is a view showing an operating state when rinsing in the water treatment apparatus according to the first embodiment of the present invention,
6 is a view showing an operating state when rinsing water drainage in the water treatment apparatus according to the first embodiment of the present invention,
7 is a view showing an operating state when the purified water inflow in the water treatment apparatus according to the first embodiment of the present invention,
8 is a view showing the configuration of a water treatment apparatus according to a second embodiment of the present invention;
9 is a view showing a configuration of a water treatment apparatus according to a third embodiment of the present invention,
10 is a view showing a configuration of a water treatment apparatus according to a fourth embodiment of the present invention,
Fig. 11 is a schematic diagram for measuring hypochlorous acid concentration depending on whether or not electrolytic sterilization water passes through the carbon filter. Fig.
12 is a schematic view for measuring the residual chlorine concentration according to the installation position of the sterilizing module in the water treatment apparatus of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

≪ Embodiment 1 >

1 is a view showing the configuration of a water treatment apparatus according to a first embodiment of the present invention.

The water treatment apparatus according to the first embodiment of the present invention includes a filter unit 100 composed of a plurality of filters 110, 120, 130 and 140 for filtering raw water, a storage unit 200 for storing the filtered water in the filter unit 100, A sterilizing module 300 for supplying sterilizing water to the storage 200, a water intake 400 for taking water stored in the storage 200 to the user, And a drainage unit 500 for draining sterilized water to the outside.

The filter unit 100 includes a pretreatment sedimentation filter 110 for filtering debris in raw water, a pre-carbon filter 120 for removing chlorine components and odors in raw water, A post-carbon filter 130 for removing chlorine components and odors contained in the raw water, and a hollow fiber membrane filter 140 for removing bacteria and other particulates contained in the purified water passing through the post-carbon filter 130 . In this case, the order of the post-carbon filter 130 and the hollow fiber membrane filter 140 may be reversed.

A plurality of pipes 601, 602 and 603 are connected to each of the filters 110, 120, 130 and 140 to form a purified water movement line through which purified water moves, and a pre- A raw water valve 150 may be provided on the pipe 601 for controlling the inflow of raw water.

The raw water valve 150 may be installed at the inlet side of the pretreatment sedimentation filter 110, but since the raw water contains a large amount of foreign substances, when the raw water flows directly into the raw water valve 150, the durability of the raw water valve 150 may be reduced. Since it may fall, it is preferable to pass the raw water valve 150 after the first filtering the foreign matter contained in the raw water in the pre-treatment settling filter 110.

The storage unit 200 stores the filtered water in the filter unit 100 and is connected to the hollow fiber membrane filter 140 by a purified water supply line 604 to store cold water and purified water. A storage tank 210 and a second storage tank 220 connected to the first storage tank 210 by a connection line 621 to store hot water.

The first storage tank 210 has a water level sensor 211 for sensing the water level inside the tank to control the supply of water introduced into the tank, the water introduced into the tank when the water level sensor 211 is malfunctioning Ball tower 212 for blocking the separation plate 213, the separation plate 213 for separating the internal space of the tank into the upper space 210a, where the purified water at room temperature is stored and the lower space 210b, the cold water is stored. Extending downward from the center of the lower space 210b to be connected to the second storage tank 220 to supply the purified water to the second storage tank 220 without being mixed with cold water. A connection passage 214 is provided.

When the water level sensor 211 senses that the water level in the first storage tank 210 is a high water level, the raw water valve 150 is turned off to cut off the supply of raw water. When the sensor 211 malfunctions, the inlet port through which water flows into the first storage tank 210 at a higher level than the level sensor 211 is mechanically blocked.

In the present embodiment, it is assumed that both the water level sensor 211 and the ball top 212 are provided, but only the water level sensor 211 or the ball top 212 is provided to control the water level inside the first storage tank 210. It can also be configured as.

One end of the connection line 621 is connected to the first storage tank 210 to be connected to the connection flow path 214, the other end is connected to the second storage tank 220, the filter unit 100 The purified water supplied through is supplied to the second storage tank 220 through the connection line 621 as well as the first storage tank 210.

A cooling coil (not shown) for cooling purified water stored in the lower space 210b is provided on the outer circumference of the lower space 210b. A heater for heating the purified water stored in the outer circumference of the second storage tank 220 Not shown). Of course, the cooling coil and the heater may be provided in the lower space 210b of the first storage tank 210 and the second storage tank 220.

The sterilization module 300 is installed on the sterilization water line 612. For example, the sterilization module 300 electrolyzes water to react chlorine ions contained in the raw water with hydrogen, oxygen, etc. to generate sterilizing substances such as HOCl and ClO ^- (Not shown in the figure) and a negative electrode (not shown in the figure), and the positive and negative electrodes may be supplied with power by a power supply unit (not shown in the figure) Or iridium may be coated.

A sterilization water supply valve 310 is provided at a front end of the sterilization module 300 to control whether water is supplied to the sterilization module 300. The sterilization water line 612 connects between the outlet of the pretreatment sedimentation filter 110 and the inlet of the hollow fiber membrane filter 140 and is connected in parallel with the purified water movement lines 601, 602 and 603.

When the raw water that has passed through the pretreatment sedimentation filter 110 passes through the pre-carbon filter 120 and the post-carbon filter 130, the chlorine component that functions as a sterilizing material is removed. Therefore, the purified water lines 601, 602, The raw water having passed through the pretreatment sedimentation filter 110 in the sterilization mode is supplied to the sterilization module 300 without passing through the pre-carbon filter 120 and the post-carbon filter 130, The germicidal material generated by the sterilizing material 300 and the germicidal material contained in the raw water may be added to increase the concentration of the germicidal material filled in the first storage tank 210 to improve the germicidal effect.

The water stored in the first storage tank 210 and the second storage tank 220 is supplied to the user through the water intake unit 400. The water intake unit 400 includes a first water intake valve 410 installed on a first water intake line 631 connected to the lower space 210b of the first storage tank 210 to regulate the supply of cold water, A second water intake valve 420 installed on a second water intake line 632 connected to the first and second storage tanks 220 and regulating the supply of hot water and water intake ports 450a and 450b for supplying the cold water and hot water to the user, .

The drainage unit 500 drains the sterilized water filled in the first storage tank 210 and the second storage tank 220 to the outside and discharges the sterilized water in the first storage tank 210 to the outside A first drain line 641 branched from the first water intake line 631 to drain water into the second storage tank 220, a second drain line 642 for draining sterilized water inside the second storage tank 220 to the outside, Two drain valves 510 and 520 for controlling the sterilization water drained through the first drain line 641 and the second drain line 642 and a drain pump 530 for smooth drainage of sterilized water. Although the configuration for draining sterilized water has been described above, draining of purified water and rinse water is also performed by the same configuration.

The first water intake line 631 located at the front end of the first water intake valve 410 is filled with water, In the present invention, the first drain line 641 is branched on the first water intake line 631 immediately before the first water intake valve 410 to sterilize the inside of the first water intake line 631 using sterilized water drained It is possible to minimize the area of the dead zone which is not sterilized.

The drainage of the sterilized water through the drainage lines 641 and 642 may be natural drainage using the head difference or the drainage pump 530 may be installed as in the present embodiment to drain the sterilized water more smoothly, .

The drain pump 530 is a voltage / current is changed according to the change in the amount of water passing through the inside, that is, the load, load variation detection unit for detecting the change in the voltage / current (not shown) It can be configured to determine whether the drainage of purified or sterilized water is completed.

Since the sterilization mode according to the first embodiment of the present invention is performed in the order of drainage → sterilization water inflow → sterilization water drain → rinsing water inflow → rinsing water drain → water purification inflow, the first embodiment will now be described with reference to FIGS. 2 to 7. The sterilization effect of the water treatment apparatus according to the example will be described.

2 is a view showing an operating state when draining in the water treatment apparatus according to the first embodiment of the present invention, Figure 3 is a view showing a sterilizing water inflow process in the water treatment apparatus according to the first embodiment of the present invention, Figure 4 5 is a view illustrating a sterilization water draining process in a water treatment apparatus according to a first embodiment of the present invention, FIG. 5 is a view showing an operating state when rinsing in a water treatment apparatus according to the first embodiment of the present invention, and FIG. 6 is a first view of the present invention. 7 is a view illustrating an operating state when rinsing water is drained in the water treatment apparatus according to the embodiment, and FIG. 7 is a view showing an operating state of water purification in the water treatment apparatus according to the first embodiment of the present invention.

 When the sterilization mode is activated, first, as shown in FIG. 2, the raw water valve 150, the sterilization module 300, and the sterilization water supply valve 310 are in an off state, and the first drain valve 510 and the second drain are discharged. The drain valve 520 drains all of the water in the first storage tank 210 and the second storage tank 220 by operating the drain pump 530 in the on state, and when the drainage is completed, the first drain valve 510, the second drain valve 520, and the drain pump 530 are all in an off state.

Here, Off means a state in which the valves 150, 310, 510, 520 are closed or the state in which the sterilization module 300 and the drain pump 530 are not operated. On means the state in which the valves 150, 310, 510, 520 are open or the sterilization module. Means the state in which the 300 and the drain pump 530 is operated, the same meaning also in the case of other embodiments described later.

In this case, whether the water of the first storage tank 210 and the second storage tank 220 is drained, the load variation detection unit detects a change in voltage / current and receives the detected signal to switch to the next step. It can be configured as.

As shown in FIG. 3, the raw water valve 150, the first drain valve 510, the second drain valve 520, and the drain pump 530 are turned off when the drainage is completed, When the sterilization water supply valve 310 and the sterilization module 300 are turned on, the raw water that has passed through the pretreatment settling filter 110 is supplied to the sterilization module 300 And electrolyzing the water passing through the sterilization module 300 generates sterilizing materials such as hypochlorous acid (HClO), hypochlorite ion (OCl-), and chlorine (Cl ₂ ) And then flows into the filter 140.

In this case, the raw water having passed through the pretreatment sedimentation filter 110 does not pass through the pre-carbon filter 120 and the post-carbon filter 130, and is supplied to the sterilizing module 300 without removing the chlorine components contained in the raw water. The chlorine component contained in the raw water is added to the germicidal material generated in the sterilization module 300 to further increase the concentration of sterilizing water in the sterilized water filled in the first storage tank 210, The sterilizing water flowing into the filter membrane has an effect of sterilizing the bacteria remaining in the filter membrane while passing through the filter membrane.

Sterilized water that has passed through the hollow fiber membrane filter 140 flows into the first storage tank 210 and is filled into the upper space 210a and the lower space 210b and sterilized water flowing into the first storage tank 210 The water is also filled into the second storage tank 220 through the connection line 621 and the water level sensor 211 senses that the water levels of the first storage tank 210 and the second storage tank 220 are full The sterilization module 300 and the sterilizing water supply valve 310 are switched to the off state and then sterilized by the sterilizing water for a certain period of time.

After sterilization by the above-mentioned process, the sterilized water in the first storage tank 210 and the second storage tank 220 is drained. As shown in FIG. 4, the raw water valve 150 and the sterilization module The drain pump 530 is operated while the first drain valve 510 and the second drain valve 520 are turned on while the first drain valve 300 and the sterilizing water supply valve 310 are kept off, So that the sterilized water in the first storage tank 210 and the second storage tank 220 is discharged to the outside through the first drain line 641 and the second drain line 642.

As such, when the drainage of the sterilization water is completed, a rinsing process is performed to wash the sterilization water remaining in the first storage tank 210 and the second storage tank 220. As shown in FIG. The source water valve 150 is turned on while the sterilizing water supply valve 310, the first drain valve 510, the second drain valve 520, and the drain pump 530 are all turned off. When the raw water is filtered through the filter unit 100, the filtered water (hereinafter referred to as 'rinsing water') is the first storage tank 210 and the second storage tank 220 through the purified water supply line 604. Flows into).

In order to save the time required for supplying the rinse water, the sterilization module 300 is turned off and the sterilization water supply valve 310 (see FIG. 3) is operated while the rinsing water is supplied only through the purified water movement lines 601, 602, The rinsing water can be supplied through the sterilizing water line 612. [

When the rinsing water is filled up to the full water level of the first storage tank 210 and the second storage tank 220, the rinsing water is drained, as shown in FIG. 6, the raw water valve 150 and the sterilizing water supply valve 310. ) And the sterilization module 300 is in an off state, and the first drain valve 510, the second drain valve 520, and the drain pump 530 are in an on state, thereby rinsing the rinsing water. The water is drained to the outside through the drain line 641 and the second drain line 642. In this case, the rinsing water is filled up to the full water level, and the rinsing water is drained after the lapse of a predetermined time, thereby further improving the rinsing effect.

When the drainage of the rinsing water is completed, as shown in FIG. 7, the sterilizing water supply valve 310, the sterilization module 300, the first drain valve 510, the second drain valve 520, and the drain pump 530. When the raw water valve 150 is turned on in the off state, raw water is filtered through the filter unit 100 and then filled in the first storage tank 210 and the second storage tank 220. This terminates the sterilization mode.

On the other hand, the completion point of the drainage may be configured to detect that the drainage is completed by detecting the difference in voltage / current in the drainage pump 530, as described above, may be set for a time to drain for a predetermined time, It is also possible to configure a separate sensor such as an infrared sensor to determine the completion point of the drainage.

The sterilization mode as described above may be set to be automatically repeated at regular intervals, or may be configured to be performed by a user's selection.

≪ Embodiment 2 >

8 is a view showing the construction of the water treatment apparatus according to the second embodiment of the present invention. The construction of the water treatment apparatus is the same as that of the water treatment apparatus according to the first embodiment, and the cold water supplied through the three water intake lines 631, 632, And that the purified water is supplied to the user through one water inlet 440 and the sterilized water of the first storage tank 210 and the second storage tank 220 is discharged through one drain line 641 .

That is, the first intake line 631, the second intake line 632, and the third intake line 633 include the first intake valve 410, the second intake valve 420, and the third intake valve 430. Each of the three intake lines 631, 632, and 633 are combined into one intake port 440 to supply cold water, hot water, and purified water through one intake port 440.

At the points where the three intake lines 631, 632 and 633 meet, the inlet 440 and the first flow path of the water supplied through the first intake valve 410, the second intake valve 420, and the third intake valve 430. A flow path switching valve 550 for switching to any one of the drain lines 641 is installed.

The flow path switching valve 550 is set in the open direction of the valve so that the flow path on the intake port 440 side in the purified water mode, the sterilization mode is activated to the first storage tank 210 and the second storage tank 220 When draining the filled sterilized water to direct the drainage direction of the sterilized water drained through the first intake line 631 and the second intake line 632 and the third intake line 633 toward the first drain line 641 side. It is switched to block the intake port 440 side and open the flow path of the first drain line 641.

In the sterilization mode, the sterilization water drainage of the first storage tank 210 and the second storage tank 220 is performed through one drain line 641. That is, when the drain pump 530 and the flow path switching valve 550 are turned on to drain sterilized water in the first storage tank 210 and the second storage tank 220 to the outside, The water in the tank 210 and the second storage tank 220 is drained to the outside through the first drainage line 641.

In this case, when the capacity of the drain pump 530 is increased, noise may be generated and the structure may become complicated due to an increase in volume. In this case, the drain pump 530 may be disposed in the first drain line 641, The water in the first storage tank 210 and the water in the second storage tank 220 are discharged to the first drain line 641 by a pressure difference .

Hereinafter, a method of draining water from the first storage tank 210 and the second storage tank 220 through the first drain line 641 will be described.

First, the second intake valve 420 is opened in a state that the flow path switching valve 550 is turned on. In this case, the water in the second storage tank 220 is drained to the first drain line 641 through the second drain line 632 connected to the upper portion, and the second drain line 632 is drained to the second drain In order to drain the water in the second storage tank 220 through the second water intake line 632 because the water is located higher than the tank 220 and the water in the upper space 210a of the first storage tank 210 is drained through the second water intake line 632, 2 storage tank 220 so that the water in the second storage tank 220 drains through the second water intake line 632 together with the water introduced from the upper space 210a.

In this case, the third intake valve 430 is opened for a predetermined time after the second intake valve 420 is opened. In this case, sterilization water in the upper space 210a is drained through the third intake line 633 The inside of the third water intake line 633 can be sterilized.

The first water intake valve 410 is opened after the third water intake valve 430 is opened so that the water in the lower space 210a of the first storage tank 210 is drained through the first water intake line 631. [ The upper space 210a and the lower space 210b are communicated with each other by a predetermined distance between the edge of the separator 213 of the first storage tank 210 and the inner surface of the first storage tank 210 The water in the upper space 210a may be introduced into the lower space 210b and then drained through the first water intake line 631 even if only the first water intake valve 410 is opened.

In this way, the water in the first storage tank 210 and the second storage tank 220 can be drained through one drain line 641 to simplify the piping structure, It is possible to sterilize even the interior of the cells 631, 632, 633, thereby minimizing the area of the dead zone which is not sterilized.

Third Embodiment

FIG. 9 is a view showing a configuration of a water treatment apparatus according to a third embodiment of the present invention, wherein all configurations are the same as those of the water treatment apparatus according to the second embodiment, and the sterilization module 300 is disposed immediately before the hollow fiber membrane filter 140 And is installed on the integer movement line 603 connected to the integer movement line 603.

In the first and second embodiments, the sterilizing module 300 is installed on the sterilizing water line 612 connected in parallel with the integer movement lines 601, 602 and 603. However, in the present embodiment, the sterilizing water line 612 The sterilizing module 300 is provided on the purified water line 603 connected to the inlet of the hollow fiber membrane filter 140. When the sterilizing mode is activated, sterilizing water generated in the sterilizing module 300 140 can be sterilized so that cleaner water can be supplied to the user.

<Fourth Embodiment>

FIG. 10 is a view showing a configuration of a water treatment apparatus according to a fourth embodiment of the present invention. The configuration of the water treatment apparatus is the same as that of the water treatment apparatus according to the third embodiment. In the lower part of the second storage tank 220, (642) is provided.

The second drain line 642 is connected to the lower portion of the second storage tank 220 so that the water in the first storage tank 210 and the second storage tank 220 is discharged through the first drain line 641 and the second drainage line 642, respectively.

<Experimental Results>

11 is a schematic diagram for measuring the concentration of hypochlorous acid depending on whether the sterilized water passes through the carbon filter, and the experimental results will be described with reference to Fig.

This experiment was conducted to examine whether the sterilization water generated by the sterilization module could sterilize bacteria remaining in the filter membrane of the hollow fiber membrane filter according to whether the sterilization water passed through the pre-carbon filter or the post-carbon filter .

Measuring position Measurement ① Measure ② Measurement ③ Hypochlorous acid
(ppm) 32 3 29 33 3 30 33 4 31 Average 33 3 30

The experimental results shown in the above table are the result of measuring the concentration of hypochlorous acid at three measurement points as shown in FIG. First, the first point indicated by measurement ① is the point where sterilized water is taken immediately after passing the salt water in which the chloride ion is dissolved into the sterilization module for generating the sterilizing substance. In the sterilization water at the measuring point ①, the average amount of hypochlorous acid is 33 ppm Concentration.

Next, the second point indicated by measurement (2) is the point where the sterilized water generated from the sterilization module is passed through the pre-treatment sedimentation filter, the pre-carbon filter, the post-carbon filter and the hollow fiber membrane filter, The sterilized water in (2) contains hypochlorous acid at an average concentration of 3 ppm. It can be seen that the bactericidal substance such as hypochlorous acid is removed through the pre-carbon filter and the post-carbon filter to lower the sterilization concentration of sterilized water.

Finally, the third point indicated by the measurement (3) is the point where the sterilization water generated in the sterilization module is passed through the pretreatment sedimentation filter and the hollow fiber filter in order, and the sterilization module 300 of the first embodiment of the present invention . In this case, as shown in the above table, the sterilized water in measurement (3) contains hypochlorous acid at an average concentration of 30 ppm, and the filter membrane of the hollow fiber membrane filter and the first and second The inside of the storage tanks 210 and 220 and the first to third water intake lines 631, 632 and 633 can be sufficiently sterilized.

FIG. 12 is a configuration diagram for measuring the concentration of residual chlorine according to the installation position of the sterilizing module in the water treatment apparatus of the present invention, and the experimental results will be described with reference to FIG.

This experiment was conducted to determine whether the sterilization module is suitable for sterilization by measuring the concentration of residual chlorine in the sterilization water generated by the sterilization module, depending on whether the sterilization module is located at the downstream of the pretreatment sedimentation filter or at the downstream of the poster carbon filter to be.

enemy Sterilization Module Location After the pretreatment sedimentation filter Post carbon filter rear end Residual chlorine (ppm)

0.12 1.16 0.95 0.87 0.18 1.12 0.98 0.92 0.14 1.14 1.02 0.85 Average 0.15 1.14 0.98 0.88

12 (a), when the sterilization module is located at the downstream end of the pretreatment sedimentation filter, if the raw water having a residual chlorine concentration of about 0.1 to 0.2 ppm is electrolyzed in the sterilization module located at the downstream end of the pretreatment sedimentation filter, The residual chlorine concentration included was measured as 1.14 ppm on average.

When the sterilization module is located at the rear end of the post-carbon filter as shown in FIG. 12 (b), when the raw water is electrolyzed in the sterilization module located at the rear end of the post-carbon filter, the residual chlorine concentration contained in the sterilized water is 0.98 or 0.88 ppm.

Normally, the effective chlorine concentration administered by water and sewage treatment plant is between 0.2 ~ 0.8ppm, and the effective chlorine concentration of tap water flowing into and out of home is about 0.2 ~ 0.4ppm. can not do it.

Therefore, as shown in the experimental results of the present invention, sterilizing water having a residual chlorine concentration of 1.14 ppm can be generated when the sterilizing module is disposed on the downstream side of the pretreatment sedimentation filter as in the first and second embodiments, Even when the sterilizing module is disposed at the rear end of the post-carbon filter as in the third and fourth embodiments, sterilizing water having a residual chlorine concentration of 0.98 or 0.88 ppm can be generated and is sufficient to function as sterilizing water.

The result value may vary according to the chlorine ion concentration of the tap water and the structure of the sterilization module and the combination of the electrodes, the concentration may vary depending on the current value applied to the electrode, the structure of the sterilization module and the combination of the electrodes and the current value. By controlling the sterilization module having a higher efficiency, such as by adjusting the concentration of the sterilizing material can be increased.

As described above, according to the present invention, sterilizing module is provided at the front end of the hollow fiber membrane filter, thereby sterilizing the germs generated in the filter membrane of the hollow fiber membrane filter and sterilizing the inside of the storage tank, The water can be supplied to the user and the drain line for draining the sterilized water is branched from the drain just before the water intake valve provided on the water intake line for supplying water to the user and discharged to the outside, It is possible to minimize the area of the dead zone which is not sterilized inside the water treatment apparatus. In addition, by supplying the sterilization module with the water not passing through the carbon filter, the sterilization material generated by the sterilization module and the sterilization material contained in the raw water are added, thereby increasing the concentration of the sterilization material in the sterilization water and improving the sterilization effect of the storage tank and the water intake line And the piping structure can be simplified by connecting one drainage line to the two storage tanks to make drainage.

As described above, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention as defined in the appended claims. And such modifications are within the scope of the present invention.

100 filter unit 110 pretreatment precipitation filter
120: pre-carbon filter 130: post carbon filter
140: hollow fiber membrane filter 150: raw water valve
200: storage unit 210: first storage tank
210a: upper space 210b: lower space
211: Level sensor 212:
213: separating plate 214: connecting channel
220: second storage tank 300: sterilization module
310: sterilization water supply valve 400:
410: first intake valve 420: second intake valve
430: Third intake valve 440:
500: drain part 510: first drain valve
520: second drain valve 530: drain pump
550: flow path switching valves 601, 602, 603: constant flow moving lines
604: purified water supply line 612: sterilized water supply line
621: connection line 631: first withdrawal line
632: second withdrawal line 633: third withdrawal line
641: first drain line 642: second drain line

Claims (15)

a) draining the water in the reservoir where the filtered water is stored through the filter section;
b) sterilizing by supplying sterilized water to the storage unit;
c) draining the sterilized water inside the storage unit to the outside,
A drainage pump is disposed in the drainage line through which the sterilizing water is drained, and a water treatment method includes determining whether the drainage is completed by detecting a load change in the drainage pump. The method of claim 1,
The filter unit is composed of a plurality of filters including a hollow fiber membrane filter;
The sterilization module for supplying the sterilizing water is characterized in that the water treatment method provided in the front end of the hollow fiber membrane filter The method of claim 1,
The storage unit is composed of a first storage tank and a second storage tank for storing water of different temperatures, when supplying sterilized water to the storage when the water level sensor provided in the first storage tank detects the high water level Water treatment method characterized in that it is determined that the sterilizing water filled in the first storage tank and the second storage tank is full water level. The method of claim 1,
Wherein the sterilization water drained from the storage unit is discharged to the outside through a water intake line connecting the storage unit and the intake valve. The method of claim 1,
Water treatment method characterized in that the water purifying line is connected in parallel with each filter of the filter unit and the sterilizing water line is connected in parallel with the purified water moving line is installed sterilization module for supplying the sterilization water. 6. The method of claim 5,
Characterized in that the sterilization water in the storage unit is drained to the outside and the rinsing water is supplied together through the purified movement line and the sterilization water line The method of claim 1,
The storage unit includes a first storage tank and a second storage tank for storing at different temperatures, the drain line is a first drain line for draining the sterilized water filled in the first storage tank and the second storage tank, respectively And a second drainage line The method of claim 7, wherein
Water treatment method, characterized in that the first drain line and the second drain line is provided with a drain valve for controlling the drainage of sterilizing water, respectively The method of claim 1,
The storage unit includes a first storage tank and a second storage tank for storing at different temperatures, and the drain line is a first drain line for draining sterilized water filled in the first storage tank and the second storage tank. Water treatment method characterized in that 10. The method according to claim 7 or 9,
The first drain line is branched on the intake line connecting the first storage tank and the intake valve, the sterilizing water drained from the first storage tank is characterized in that via the intake line. 10. The method according to claim 7 or 9,
Water stored in the first storage tank and the second storage tank is discharged through one intake port through a plurality of intake lines; The water treatment method is characterized in that the discharge direction of the water supplied from the first and second storage tank is switched by the flow path switching valve installed at the point where the first drain line and the intake line intersect. The method of claim 1,
The load change of the drain pump is a water treatment method characterized in that the change in current or voltage. The method of claim 1,
d) rinsing the rinsing water filtered by the filter unit after the step c) to rinse the storage unit;
e) draining the rinse water out of the reservoir to the outside;
f) filling the storage unit with the constants filtered by the filter unit;
Water treatment method characterized in that it further comprises 14. The method of claim 13,
Wherein the storage unit comprises a first storage tank and a second storage tank for storing water at different temperatures and is filled up to the full water level of the first storage tank and the second storage tank in step d) e) step of rinsing water is carried out. 14. The method of claim 13,
Wherein the storage unit comprises a first storage tank and a second storage tank for storing water at different temperatures and the first storage tank and the second storage tank are connected by a connection line, Is introduced into the first storage tank first and then flows into the second storage tank via the connection line

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