KR101804485B1 - water purifing system having cleaning device within RO filter - Google Patents

water purifing system having cleaning device within RO filter Download PDF

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KR101804485B1
KR101804485B1 KR1020150189314A KR20150189314A KR101804485B1 KR 101804485 B1 KR101804485 B1 KR 101804485B1 KR 1020150189314 A KR1020150189314 A KR 1020150189314A KR 20150189314 A KR20150189314 A KR 20150189314A KR 101804485 B1 KR101804485 B1 KR 101804485B1
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South Korea
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water
reverse osmosis
osmosis membrane
membrane filter
storage tank
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KR1020150189314A
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Korean (ko)
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KR20170079110A (en
Inventor
정태호
최수현
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주식회사 피코그램
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • B01D35/1475—Pressure relief valves or pressure control valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/157—Flow control valves: Damping or calibrated passages
    • B01D35/1573—Flow control valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/08—Prevention of membrane fouling or of concentration polarisation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/04—Backflushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/12—Use of permeate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/14—Use of concentrate

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The present invention relates to a water purification system including a reverse osmosis membrane filter (RO filter). In the water purification system, when the water purification port is closed, the purified water is purified by a reverse osmosis membrane filter and then an auto shut off valve And the raw water is introduced into the reverse osmosis membrane filter by the automotive end valve opened when the purified water is discharged from the water storage tank by opening the purified water discharge port so that the purified water system can be restarted.
A water purification system equipped with a membrane cleaning apparatus including a reverse osmosis membrane filter according to an embodiment of the present invention includes:
A reverse osmosis membrane filter for filtering out foreign substances contained in the incoming raw water and separating the separated foreign matters into purified water and concentrated water;
A first storage tank storing purified water purified by the reverse osmosis membrane filter;
A purified water outlet connected to the first storage tank;
(ASV) that interrupts the introduction of raw water into the reverse osmosis membrane filter when the purified water pressure stored in the first storage tank reaches a set value and is interlocked and switched to a closed state;
A second water storage tank installed in a branch pipe branched from the pipeline between the automotive end valve and the reverse osmosis membrane filter, for storing purified water purified by the reverse osmosis membrane filter;
And a purified water supply line for flushing the purified water stored in the second storage tank to the reverse osmosis membrane filter for an arbitrary time when the automotive end valve is switched to the off state and the raw water is blocked by the reverse osmosis membrane filter And a membrane cleaning device including a reverse osmosis membrane filter.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a water purifying system having a membrane cleaning device including a reverse osmosis membrane filter,

The present invention relates to a water purification system. More specifically, the present invention relates to a water purification system including a reverse osmosis membrane filter (RO filter). In the water purification system, when purified water is purified by a reverse osmosis membrane filter, The raw water is flowed into the reverse osmosis membrane filter by an automobile end valve opened when the purified water is discharged from the storage tank by shutting off the raw water inflow by closing the automatic shut off valve (ASV) The present invention relates to a water purification system equipped with a membrane cleaning apparatus including a reverse osmosis membrane filter.

The TDS (total dissolved solids) creep phenomenon is a phenomenon in which the TDS-induced substances contained in raw water or wastewater (referred to as concentrated water) are subjected to concentration equilibrium with respect to purified water purified in the central pipe of the reverse osmosis membrane filter (That is, the purified water purified by the reverse osmosis membrane filter becomes equal to the concentration of raw water and becomes contaminated).

The TDS creep phenomenon is conspicuous when the raw water TDS value is high, the capacity GPD of the reverse osmosis membrane filter is large, or the downtime of the water purification system is long.

In the purification system including the conventional reverse osmosis membrane filter shown in FIG. 1,

A sediment filter 1 for removing foreign substances such as rust, soil, sand, and suspended solids contained in raw water (sewage water, ground water) flowing through a hose connected to a faucet (not shown) Wow,

(Pre-carbon filter) 2 for removing chlorine components (trihalomethane), organic chemicals, etc. remaining in water by the adsorption method of activated carbon made by burning coal minerals or palm trees at high temperatures and ,

(3) a membrane filter or reverse osmosis filter (R / O) that treats various pollutants, bacteria, inorganic substances, heavy metals and the like in water through micropores having a size of 0.0001 microns by a polyamide composite membrane; Wow,

A post-carbon filter 4 for improving the water taste by treating the foreign substance such as the smell of water and the gas component,

And a purified water storage tank 7 for storing the purified water that has passed through the reverse osmosis membrane filter 3 and subjected to a purified water treatment.

At this time, wastewater (concentrated water) filtered by the reverse osmosis membrane filter 3 is discharged to a designated place via a concentrated water control valve.

In the figure, reference numeral 6 denotes an automotive end valve that automatically blocks raw water from entering the water filter side when the pressure set in accordance with the water level of the purified water filled in the water tank 7 is reached, 8 denotes an automatic water storage tank 7) is prevented from flowing backward when the pressure reaches the set pressure.

The automobile end valve 6 is provided with a purified water purification tank 7 (see FIG. 1), in which the purified water discharge amount is very small due to the use of the reverse osmosis membrane filter 3 (for example, the discharge ratio of purified water and concentrated water is about 1: 4) And is used to discharge a predetermined amount of purified water from the constant water storage tank 7 when necessary.

When the user temporarily closes the purified water outlet 5 (say, the faucet as one example), the flow of raw water into the reverse osmosis membrane filter 3 is stopped by the valve 6 of the motor vehicle, The fluid movement is temporarily stopped inside. The purified water remains in the interior of the central pipe (not shown) of the reverse osmosis membrane filter 3 and the inside of the reverse osmosis membrane filter 3 and the raw water and concentrated water .

Therefore, it is preferable that the purified water is introduced into the purified water purified water passing through the reverse osmosis membrane filter 3 at the initial stage of closing the purified water outlet 5 to temporarily stop the operation of the purified water system and then opening and restarting the purified water outlet 5 The TDS-inducing substance is temporarily increased. Therefore, there is a problem that the reliability of the user's water purification system using the purified water is low.

A water purification apparatus including an auxiliary reverse osmosis membrane filter in Application No. 10-2007-0067513 is disclosed.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a water purification system including a reverse osmosis membrane filter, The present invention has as its object to provide a water purification system equipped with a membrane cleaning apparatus including a reverse osmosis membrane filter capable of minimizing contamination of purified water.

To achieve these and other advantages and in accordance with the purpose of the present invention,

A reverse osmosis membrane filter for filtering out foreign substances contained in the incoming raw water and separating the separated foreign matters into purified water and concentrated water;

A first storage tank storing purified water purified by the reverse osmosis membrane filter;

A purified water outlet connected to the first storage tank;

(ASV) that interrupts the introduction of raw water into the reverse osmosis membrane filter when the purified water pressure stored in the first storage tank reaches a set value and is interlocked and switched to a closed state;

A second water storage tank installed in a branch pipe branched from the pipeline between the automotive end valve and the reverse osmosis membrane filter, for storing purified water purified by the reverse osmosis membrane filter;

And a purified water supply line for flushing the purified water stored in the second storage tank to the reverse osmosis membrane filter for an arbitrary time when the automotive end valve is switched to the off state and the raw water is blocked by the reverse osmosis membrane filter And a membrane cleaning device including a reverse osmosis membrane filter.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein,

A reverse osmosis membrane filter for filtering out foreign substances contained in the incoming raw water and separating the separated foreign matters into purified water and concentrated water;

A water storage tank for storing purified water purified by the reverse osmosis membrane filter;

A water outlet connected to the water storage tank;

(ASV) that interrupts the introduction of raw water into the reverse osmosis membrane filter when the purified water pressure stored in the water storage tank reaches a preset value and is interlocked and is switched to a closed state;

A purified water supply line for supplying the purified water stored in the water storage tank to the reverse osmosis membrane filter for an arbitrary time when the automotive end valve is turned off and the raw water is blocked by the reverse osmosis membrane filter;

And a valve installed in the purified water supply line for flushing so as to be openable and closable. The present invention also provides a water purification system including the membrane cleaning apparatus including the reverse osmosis membrane filter.

According to the embodiment of the present invention configured as described above, the following advantages are obtained.

In a water purification system including a reverse osmosis membrane filter, when purified water is shut off for a certain period of time and reused, the purified water is re-introduced into the concentrated water on the membrane boundary inside the reverse osmosis membrane filter, The remaining concentrated water is discharged, so that contamination with water can be minimized. Therefore, the reliability of the purified water system can be increased by the user.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a water purification system comprising a prior art RO filter,
FIG. 2 is a schematic view of a water purification system including a membrane cleaning apparatus including a reverse osmosis membrane filter according to an embodiment of the present invention;
FIG. 3 is a use state diagram of a water purification system including a membrane cleaning apparatus including a reverse osmosis membrane filter according to an embodiment of the present invention. FIG.
FIG. 4 is a schematic view of a water purification system equipped with a membrane cleaning apparatus including a reverse osmosis membrane filter according to another embodiment of the present invention;
5 is a use state diagram of a water purification system including a membrane cleaning apparatus including a reverse osmosis membrane filter according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a purification system including a membrane cleaning apparatus including a reverse osmosis membrane filter according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 to 3, the water purification system including the membrane cleaning apparatus including the reverse osmosis membrane filter according to an embodiment of the present invention includes:

(At least one of the pretreatment filters (sediment filter 10, free carbon filter 11) into which raw water (tap water, ground water, etc.) sequentially flows;

A reverse osmosis membrane filter (RO filter) 12 for separating and discharging foreign substances contained in the raw water introduced from the pre-treatment filters 10 and 11 into purified water and concentrated water;

A first water storage tank 13 (referred to as a main water storage tank) for storing purified water purified by the reverse osmosis membrane filter 12;

A water outlet 14 connected to the first water storage tank 13 (e.g., a faucet);

(ASV) 15 for shutting off the raw water into the reverse osmosis membrane filter 12 when the purified water pressure accumulated in the first storage tank 13 reaches a predetermined value and is switched to a closed state;

A second reservoir which is installed in a branch passage (17) branching from a pipeline (16) between the automobile end valve (15) and the reverse osmosis membrane filter (12) and stores purified water purified by the reverse osmosis membrane filter Tank 18 (referring to auxiliary reservoir tank);

The water stored in the second storage tank 18 is supplied to the reverse osmosis membrane filter 12 in the case where the automotive end valve 15 is switched to the OFF state to block the introduction of raw water into the reverse osmosis membrane filter 12. [ And a flushing purified water supply line 19 for supplying water for arbitrary time (which can be variably adjusted to the capacity of the ROE filter 12, etc.).

A post carbon filter (14) installed in a channel between the first water storage tank (13) and the water outlet (14) and improving the water taste of purified water discharged to the water outlet (14) after being stored in the first water storage tank (20).

More preferably, it is installed in the pipeline 16 between the automotive short-path valve 15 and the reverse osmosis membrane filter 12, and flows backward from the first storage tank 13 to the reverse osmosis membrane filter 12 And a first check valve (21) for preventing the first check valve (21).

The automobile end valve 15 is connected to the first end of the first reservoir tank 13 and the second reservoir tank 18 by a constant pressure (the pressure of the first reservoir tank 13 = the pressure of the second reservoir tank 18 ) Is reached, it is automatically switched to the OFF state.

A second check valve 22 for preventing the water from flowing backward from the second storage tank 18 to the reverse osmosis membrane filter 12 is installed in the branch passage 17 and the purified water supply line 19 for flushing, And a third check valve 23 for preventing reverse flow of water from the reverse osmosis membrane filter 12 to the second storage tank 18.

When the automobile end valve 15 is turned off and the raw water is prevented from flowing into the reverse osmosis membrane filter 12, residual water in the reverse osmosis membrane filter 12 is discharged toward the concentrated water, Is in a zero state. The purified water stored in the second storage tank 18 and the pressure difference in the reverse osmosis membrane filter 12 are mixed with the purified water in the second storage tank 18 through the flushing purified water supply line 19 (That is, the use of a separate pump for supplying the constant of the second storage tank 18 to the reverse osmosis membrane filter 12 becomes unnecessary).

In the drawing, reference numeral 24 denotes a fourth check valve for preventing the reverse flow from the reverse osmosis membrane filter 12 to the pre-carbon filter 1.

At this time, the configuration of the purified water system including the sediment filter 10, the free carbon filter 11, the reverse osmosis membrane filter 12, the post carbon filter 20, the first storage tank 13, Are substantially the same as those of the prior art purification system shown in Fig. 1, so that a detailed description of their construction is omitted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of the use of a water purification system including a membrane cleaning apparatus including a reverse osmosis membrane filter according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 to 3, in a state where the water outlet 14 is closed by a user, raw water supplied from a raw water supply source through a hose or the like passes through the sediment filter 10, ), The free carbon filter 11, and the fourth check valve 24 in order, and is supplied to the reverse osmosis membrane filter 12.

At this time, the raw water supplied from the free carbon filter 11 to the reverse osmosis membrane filter 12 is returned to the second storage tank 18 by the third check valve 23 provided in the flushing purified water supply line 19, Can be prevented.

Part of the purified water purified by the reverse osmosis membrane filter 12 passes through the first check valve 21 and the short valve 15 in this order to the first storage tank 13 .

At the same time, a part of the purified water purified by the reverse osmosis membrane filter 12 passes through the second check valve 22 of the branch passage 17 branch-connected to the conduit 16 and flows into the second storage tank 18 ).

The concentrated water (wastewater) filtered by the reverse osmosis membrane filter 12 passes through a concentrated water control valve and is discharged to a designated place.

At this time, the first storage tank 13 and the second storage tank 18, in which purified water purified by the reverse osmosis membrane filter 12 is stored, are shown in different sizes in the figure, but the first storage tank 13 and the second reservoir tank 18, the intrinsic pressures in the first reservoir tank 13 and the second reservoir tank 18 become equal.

The purified water amount to be filled in the first storage tank 13 and the second storage tank 18 is increased to switch the valve 15 to the OFF state when the internal pressure reaches the set value . In other words, since the raw water supplied from the raw water supply source is blocked by the automotive end valve 15 from entering the free carbon filter 11, the movement of the fluid in the reverse osmosis membrane filter 12, .

As the residual water in the reverse osmosis membrane filter 12 is discharged toward the concentrated water, the pressure inside the reverse osmosis membrane filter 12 maintains a zero state.

3, the pressure difference between the purified water stored in the second storage tank 18 and the residual water in the reverse osmosis membrane filter 12 (the purified water pressure in the second storage tank 18> the residual water in the reverse osmosis membrane filter 12) The purified water stored in the second reservoir tank 18 is supplied to the inlet port of the reverse osmosis membrane filter 12 through the third check valve 23 of the flushing purified water supply line 19. At this time, the purified water stored in the first storage tank 13 can be prevented from moving toward the reverse osmosis membrane filter 12 by the first check valve 21 installed in the channel 16.

Therefore, the purified water supplied from the second storage tank 18 through the flushing purified water supply line 19 is filled in the reverse osmosis membrane filter 18. Therefore, since the inside and outside of the membrane of the reverse osmosis membrane filter 12 is maintained at the low concentration TDS, the reverse osmosis membrane creeping phenomenon can be prevented.

At this time, a configuration in which residual water in the reverse osmosis membrane filter 123 is discharged through a concentrated water discharge line and flushed by the purified water supplied from the second storage tank 18 to the reverse osmosis membrane filter 12 is used in the related art A detailed description thereof will be omitted.

Accordingly, when the user opens the water outlet 14 again after the water outlet 14 is closed for a certain period of time, it is possible to minimize contamination of the water that is initially discharged through the water outlet 14 .

On the other hand, when the user opens the water outlet 14, the water stored in the first water storage tank 13 passes through the post-carbon filter 20 and is discharged to the water outlet 14. That is, the purified water is discharged from the first storage tank 13 and the purified water pressure in the interior is down, so that the vehicle end valve 15 is turned on.

The raw water supplied to the raw water supply source is sequentially supplied to the reverse osmosis membrane filter 12 through the sediment filter 10, the automobile end valve 15, the free carbon filter 11 and the automotive end valve 15 in this order The purified water purification system is restarted.

When the water outlet 14 is temporarily opened and then the water outlet 14 is opened again, the following table shows changes in the water purification performance generated in the general water purifier and the water purification system of the present invention.

[Table 1]

Figure 112015128651610-pat00001

According to the water purification system of the present invention, as shown in Table 1, when the water outlet 14 is opened again after the water outlet 14 is temporarily closed, the TDS value changed in the reverse osmosis membrane filter It is clearly confirmed that the water purification performance is recovered by comparing the TDS values of the reverse osmosis membrane filter 12 applied to the water purification system of the present invention.

4 and 5, a water purification system having a membrane cleaning apparatus including a reverse osmosis membrane filter according to another embodiment of the present invention (the purified water purified by the reverse osmosis membrane filter is not stored in a separate water storage tank, (Which is referred to as a direct water purification system)

(At least one of the pretreatment filters (sediment filter 10, free carbon filter 11) into which raw water (tap water, ground water, etc.) sequentially flows;

A reverse osmosis membrane filter 12 for filtering foreign substances contained in the raw water flowing from the pre-treatment filters 10 and 11, separating the foreign substances into purified water and concentrated water, and discharging the purified water;

A water storage tank (18) for storing purified water purified by the reverse osmosis membrane filter (12);

(14) which is connected to the water storage tank (18) and which is a purified water discharge port (for example, a faucet);

(ASV) 15 for shutting off the introduction of raw water into the reverse osmosis membrane filter 12 when the purified water pressure accumulated in the water storage tank 18 reaches a set value and is interlocked and closed;

The water stored in the water storage tank 18 is supplied to the reverse osmosis membrane filter 12 for an arbitrary time period when the automotive end valve 15 is switched to the OFF state to block the inflow of raw water into the reverse osmosis membrane filter 12. [ A purified water supply line (19) for flushing for supply;

And a valve (25) provided to the flushing purified water supply line (19) so as to be openable and closable.

A solenoid valve is used as the valve 25 to open and close the purified water supply line 19 when the electric signal is applied from the outside and the valve 25 is connected to the timer 26, The supply line 19 can be opened and closed at an arbitrary time interval.

A water storage tank 18 for storing purified water purified by the reverse osmosis membrane filter 12 and a flushing water supply line 19 connected to the timer 26 for opening / The configuration of the purified water system excluding the valve 25 for opening and closing the purified water supply line 19 at an arbitrary time interval is substantially the same as that of the purified water system according to the embodiment of the present invention, And the same reference numerals are used for the duplicated configurations.

That is, when the valve 25 provided in the purified water supply line 19 for flushing is opened by an external electrical signal at an arbitrary time interval set by the timer 26, And purified water stored in the water storage tank 18 is moved along the flushing purified water supply line 19 and supplied to the inlet side of the reverse osmosis membrane filter 12.

Therefore, the purified water passing through the flushing water supply line 19 and the valve from the water storage tank 18 is filled in the reverse osmosis membrane filter 18, so that the inside and the outside of the membrane of the reverse osmosis membrane filter 12 are filled with low- TDS, so that the reverse osmosis film creep phenomenon can be prevented.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims. And changes may be made without departing from the spirit and scope of the invention.

10; Sediment filter
11; Free carbon filter
12; Reverse osmosis membrane filter
13; The first reservoir tank
14; Water outlet
15; Automotive end-of-line valves (ASV)
16; pipeline
17; By branch
18; The second reservoir tank
19; Purification line for flushing
20; Post carbon filter

Claims (8)

A reverse osmosis membrane filter for filtering out foreign substances contained in the incoming raw water and separating the separated foreign matters into purified water and concentrated water;
A first storage tank storing purified water purified by the reverse osmosis membrane filter;
A purified water outlet connected to the first storage tank;
(ASV) that interrupts the introduction of raw water into the reverse osmosis membrane filter when the purified water pressure stored in the first storage tank reaches a set value and is interlocked and switched to a closed state;
A second water storage tank installed in a branch pipe branched from the pipeline between the automotive end valve and the reverse osmosis membrane filter, for storing purified water purified by the reverse osmosis membrane filter;
Wherein when the automotive end valve is turned off to block the inflow of raw water into the reverse osmosis membrane filter, an integer in the second storage tank is determined by the pressure difference between the purified water stored in the second storage tank and the reverse osmosis membrane filter, And a reverse osmosis membrane filter for supplying the reverse osmosis membrane filter for an arbitrary time, the reverse osmosis membrane filter comprising:
A first check valve installed in a pipeline between the automobile end valve and the reverse osmosis membrane filter to prevent the water from flowing backward from the first storage tank to the reverse osmosis membrane filter;
A second check valve installed in the branch pipe and the purified water supply line for flushing to prevent water from flowing backward from the second storage tank to the reverse osmosis membrane filter;
And a third check valve for preventing reverse flow of water from the reverse osmosis membrane filter to the second storage tank,
Wherein the automotive end valve is automatically switched to an off state by a constant pressure when the pressure of the purified water filled in the first and second water storage tanks reaches a set value. .

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