WATER PURIFICATION SYSTEM

Abstract

The inventions relate to purifying water and can be used in domestic water purification systems. The claimed filtered water storage unit for the storage device of a water purification system includes a housing, an elastic chamber for filtered water, and a region for pressurizing untreated water. The water purification system includes a reverse osmosis membrane, a clean water discharge pipe, an overflow into a drain, a clean water tap, and a storage device having a filtered water storage unit and a hydroautomatic unit. The outlet of the controlled chamber of a valve is associated with the water pressurizing region in the housing of the water storage unit, and the input of the controlling chamber of a valve is associated with the clean water discharge pipe upstream of the tap, wherein the valve for controlling water pressurization is normally open and the valve for controlling drainage is normally closed.

Claims

1. A water storage unit for a storage device of a water purification system, the water storage unit comprising: a housing having a cavity and a first port, the first port in communication with a first line to receive and transmit non-treated water; a monolithic chamber having a rigid neck, an elastic body, and a second port, the chamber located inside the cavity and the neck fixed rigidly to the housing, the second port in communication with a second line to receive and transmit filtered water, the neck made of a thermoplastic elastomer having a first supramolecular structure, the body made of the thermoplastic elastomer in which the first supramolecular structure is modified to form a second supramolecular structure that is biaxially-oriented; and a pumping zone formed in the cavity between the chamber and the housing, the pumping zone and the chamber capable of storing separate volumes of the non-treated water and the filtered water, the volumes capable of being increased and decreased reciprocally via the first port and the second port to form cyclical loads on the elastic body of the chamber, wherein the first supramolecular structure provides fixation rigidity of the neck to the housing, while the second supramolecular structure provides increased resistance of the body to the cyclical loads.

2. The water storage unit of claim 1, wherein chamber is hermetically separated from the cavity of the housing.

3. The water storage unit of claim 1, wherein the thermoplastic elastomer is a polyolefin or a styrene.

4. The water storage unit of claim 1, wherein the first port provides bidirectional flow of the non-treated water among the pumping zone and the first line.

5. The water storage unit of claim 1, wherein the second port provides bidirectional flow of the filtered water among the chamber and the second line.

6. The water storage unit of claim 5, wherein the neck has a first wall and the body has a second wall, the second wall being at least 20% thinner than the first wall.

7. The water storage unit of claim 6, wherein thickness of the second wall is between about 0.1 mm and about 5 mm.

8. The water storage unit of claim 6, wherein thickness of the second wall is between about 0.3 mm and about 2 mm.

9. The water storage unit of claim 1, wherein the chamber is formed by two-stage blow forming of the thermoplastic elastomer.

10. The water storage unit of claim 1, wherein the neck is blow-formed from the thermoplastic elastomer, the neck having the first supramolecular structure.

11. The water storage unit of claim 10, wherein the body is blow-formed from the thermoplastic elastomer that extends the body from the neck, the body having the second supramolecular structure.

12. The water storage unit of claim 11, wherein cold orientational crystallization forms the second supramolecular structure that is biaxially-oriented.

13. A water storage unit for a storage device of a water purification system, water storage unit comprising: a housing; a monolithic chamber located inside the housing for filtered water, the chamber comprising a neck and a body, the neck formed from a thermoplastic elastomer and the body formed from the thermoplastic elastomer modified to a biaxially-oriented structure, the neck rigidly connecting the chamber to the housing; and a pumping zone for non-treated water formed by a space between the chamber and the housing.

14. The water storage unit of claim 13, wherein chamber is hermetically separated from the space of the housing.

15. The water storage unit of claim 13, wherein the thermoplastic elastomer is a polyolefin or a styrene.

16. The water storage unit of claim 13, wherein the housing comprises a first port to provide bidirectional flow of the non-treated water into and out of the pumping zone.

17. The water storage unit of claim 13, wherein the chamber comprises a second port to provide bidirectional flow of filtered water into and out of the chamber.

18. The water storage unit of claim 13, wherein the neck has a first wall and the body has a second wall, second wall being at least 20% thinner than the first wall.

19. The water storage unit of claim 18, wherein thickness of the second wall is between about 0.1 mm and about 5 mm.

20. The water storage unit of claim 18, wherein thickness of the second wall is between about 0.3 mm and about 2 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0074] The proposed group of inventions entitled as Filtered water storage unit for a storage device of a water purification system, the storage device of the water purification systems (embodiments), the water purification system (embodiments) are illustrated by the following drawings.

[0075] FIGS. 1A and 1B show a functional diagram of the water purification system according to the first embodiment with using the storage device according to the first embodiment, and the filtered water storage unit in:

[0076] a) state at closed clean water tap (FIG. 1A); and

[0077] b) state at open clean water tap (FIG. 1B).

[0078] FIGS. 2A and 2B show a functional diagram of the water purification system according to the second embodiment with using the storage device according to the second embodiment, and the filtered water storage unit in:

[0079] a) state at closed clean water tap (FIG. 2A); and

[0080] b) state at open clean water tap (FIG. 2B).

[0081] FIGS. 3A and 3B show a functional diagram of the water purification system of Kinetico Incorporated (prototype) in:

[0082] a) state at closed clean water tap (FIG. 3A); and

[0083] b) state at open clean water tap (FIG. 3B).

[0084] FIGS. 4A and 4B show an example of structural embodiment (first embodiment) with:

[0085] a) drainage automatic control valve (FIG. 4A); and

[0086] b) water pumping automatic control valve (FIG. 4B).

[0087] FIG. 5 shows an example of structural embodiment (second embodiment) of automatic control valves for water pumping and drainage control with a common controlling chamber.

DETAILED DESCRIPTION

[0088] The proposed water purification system in the general case of implementation performed according to the first embodiment with use of the proposed storage device performed according to the first embodiment and also the proposed storage unit for filtered water (FIGS. 1A and 1B) includes the reverse osmosis membrane 1, the outlet pipe 2 of the clean water pipeline, a drainage 3, a clean water tap 4, and a storage device 5 including a filtered water storage unit 6 and a hydroautomatic unit 7,

[0089] wherein the filtered water storage unit 6 has a housing 8 in which there is located an elastic chamber 9 for filtered water and a pumping zone 10 for untreated (supplied) water, which zone is created by space between the chamber walls and the housing walls, and the hydroautomatic unit 7 includes a water pressure-sensitive automatic control valve 11 for water pumping control in the housing 8 of the filtered water storage unit 6 with a controlling chamber and controlled chamber, and automatic control valve 12 for drainage control with a controlling chamber and controlled chamber,

[0090] wherein the water pumping control valve 11 normally is open, and the drainage control valve 12 normally is closed, the input of the reverse-osmosis membrane 1 is connected to the pressurized water supply, the output of the reverse-osmosis membrane 1 with the purified water (permeate) is connected with the clean water tap 4 via the outlet pipe 2 and with the inner cavity of the elastic chamber 9 in the housing 8 of the filtered water storage unit 6, and the output of the reverse-osmosis membrane 1 with water including filtered impurities (concentrate) is connected to the drainage 3.

[0091] At the same time, the controlling chamber of the water pumping control valve 11 is connected to the outlet pipe 2 for purified water, the controlled chamber input of the valve 11 is connected to the water supply, the controlled chamber input of the drainage control valve 12 is connected to the water pumping zone 10 in the housing 8 of the filtered water storage unit 6, and its output is connected to the drainage 3; the controlled chamber output of the water pumping control valve 11 is connected to the water pumping zone 10 in the housing 8 of the filtered water storage unit 6, and the input of the controlling chamber of the drainage valve control 12 is connected to the purified water outlet pipe 2 upstream of the tap 4.

[0092] The proposed water purification system in the general case of implementation according to the second embodiment with use of the proposed storage device implemented according to the second embodiment, and also the proposed storage unit for filtered water (FIG. 2) includes the reverse osmosis membrane 1, the outlet pipe 2 of the clean water pipeline, the drainage 3, the clean water tap 4 and the storage device 5 including the filtered water storage unit 6 and hydroautomatic unit 7,

[0093] wherein the filtered water storage unit 6 includes the housing 8 in which there is located the elastic chamber 9 for filtered water and the pumping zone 10 for untreated (supplied) water, which pumping zone is created by space between the chamber walls and the housing walls, and the hydroautomatic unit 7 includes the water pressure-sensitive automatic control valve 11 for water pumping control in the housing 8 of the filtered water storage unit 6 with the controlling chamber and the controlled chamber, and the automatic control valve 12 for drainage control with the controlling chamber and the controlled chamber,

[0094] wherein the input of the reverse-osmosis membrane 1 is connected to the pressurized water supply, the output of the reverse-osmosis membrane 1 with the purified water (permeate) is connected with the clean water tap 4 via the outlet pipe 2 and with the inner cavity of the elastic chamber 9 in the housing 8 of the filtered water storage unit 6, and the output of the reverse-osmosis membrane 1 with water including filtered impurities (concentrate) is connected to the drainage 3.

[0095] At the same time, the water pumping control valve 11 in the pumping zone 10 in the housing 8 of the filtered water storage unit 6 and the drainage control valve 12 are constructively combined together and have the single common controlling chamber, which by its input and output is connected to the outlet pipe 2 (permeate) upstream of the clean water tap 4, controlled chambers of the water pumping control valve 11 and the drainage control valve 12 are connected to the controlling chamber in parallel,

[0096] wherein the water pumping control valve 11 normally is open, and the drainage control valve 12 normally is closed, and wherein the input of the controlled chamber of the water pumping control valve 11 is connected to the water supply pipeline, and the output of the controlled chamber of the water pumping control valve 11 is connected to the pumping zone 10 in the housing 8 of the filtered water storage unit 6, the input of the controlled chamber of the drainage control valve 12 is connected to the pumping zone 10 in the housing 8 of the filtered water storage unit 6, and its output is connected to the drainage.

[0097] In particular cases of implementing the water purification system according to both the first and second embodiments, the system further includes the prefilter 13 installed upstream of the reverse osmosis membrane 1.

[0098] In particular cases of implementing the water purification system according to both the first and second embodiments, the system further includes a shut-off hydraulically operated valve 14 placed upstream of the reverse osmosis membrane 1 and connected to the filtered water outlet pipe 2.

[0099] In particular cases of implementing the water purification system according to both the first and second embodiments, the system further includes the postfilter 15 installed in the purified water (permeate) line upstream of the tap 4.

[0100] In particular cases of implementing the water purification system according to both the first and second embodiments, the system further includes the check valve 16 installed in the purified water (permeate) line upstream of the hydroautomatic unit 7.

[0101] In particular cases of implementing the water purification system according to both the first and second embodiments with use of the proposed storage device implemented according to both the first and second embodiments, and also the proposed filtered water storage unit (FIGS. 1A and 1B, FIGS. 2A and 2B), when the body of the elastic chamber 9 of the filtered water unit storage 6 is performed of modified thermoplastic elastomer with biaxially-oriented structure, in particular selected preferably from the group of thermoplastic polyolefin elastomers or thermoplastic styrene elastomers, and also in other particular cases, in which walls of the body of the chamber 9 of the filtered water storage unit 6 are at least 20% thinner than the walls of the neck of the chamber 9, or preferably have a thickness of 0.1 mm to 5 mm, most preferably 0.3 mm to 2 mm, their units and elements are the same as in the general case of their implementation.

[0102] The proposed water purification system in the general case of implementation according to the first embodiment, with use of the proposed storage device implemented according to the first embodiment, and also the proposed filtered water storage unit (FIGS. 1A and 1B), is operated as follows.

[0103] Initially, the system is not connected to the water supply under high pressurewater supply pipeline, i.e., the inlet valve (is not shown in the drawing) is closed; there is no water in the elastic chamber 9 of the filtered water storage unit 6 of the storage device 5, the drainage automatic control valve 12 is in the closed position, the position of the water pumping control valve 11 does not matter, and the pure water tap 4 is open.

[0104] At the first turn on of the system, i.e., at its connection to the water supply, the inlet valve (not shown) opens. Since the clean water tap 4 is opened, the pressure in the cavity of the elastic chamber 9 of the filtered water storage unit 6 in the storage device 5 is a little more than zero (0 bar). And since the pressure drop across the reverse osmosis membrane (ROM) 1 is nearest to zero, the pressure upstream of the ROM is determined by the pressure in the cavity of the elastic chamber 9, and is also slightly different from zero. Since, in this case, the ROM represents a significant hydraulic resistance, water does not pass through the ROM and does not enter the cavity of the elastic chamber 9 of the filtered water storage unit 6 of the storage device 5, and the water from the supply main pipeline enters the controlled chamber of the water pumping control valve 11.

[0105] In the cavity of the controlled chamber of the automatic valve 11, water exerts pressure on the elastic membrane, which hermetically separates it from the cavity connected to the atmosphere; the membrane, in turn, exerts pressure on the end of the rod of the automatic valve 11, and since in the control cavity, this time, there is no pressure (the clean water tap 4 is open), then the pressure is not exerted on the end of the rod from the side of the cavity, which results in displacement of the rod, i.e., the water pumping automatic control valve 11 opens and allows water to flow through it into the water pumping zone 10 of the water storage unit 6 of the storage device 5. The supplied water entering into the pumping zone 10 puts pressure on walls of the easily deformable elastic chamber 9, thereby compressing it and pushing out the technical air, which goes into the atmosphere through the open clean water tap 4.

[0106] This happens as long as the water entering the pumping zone 10 of the water storage unit 6 of the storage device 5 fills the volume available to it in the housing 8.

[0107] Once this occurs, the pressure in the pumping zone 10 starts to increase up to a value slightly lower than the pressure in the main water supply pipeline, after which the flow of water in the pumping zone 10 is terminated. As a result, the pressure at the point upstream of the ROM 1 increases almost up to the pressure in the main water supply, and the water flows to the input of the ROM. Passing through the ROM, the water is split into two streams: the first stream is filtered and purified demineralized water (permeate), which from the output of the ROM enters to the clean water pipeline via the outlet pipe 2, and the second stream is water containing filtered impurities including salt (concentrate), which goes to the drainage 3. Since at the same time, the supplied water continues to put pressure on the walls of the elastic chamber 9 of the filtered water storage unit 6 of the storage device 5, the purified water cannot get into the cavity of the elastic chamber 9 and, instead, enters the open clean water tap 4 and freely flows from the clean water tap 4.

[0108] At this moment, the clean water tap 4 is closed, discharge of purified water (permeate) through the tap stops, leading to increased pressure in the clean water pipeline within the system. In this case, the stem of the water pumping automatic control valve 11 begins to move in the direction of the controlled chamber as long as this will block the water supply out of it, as a result of which, there is terminated water supply from the water mains into the pumping zone 10 of the filtered water storage unit 6 of the storage device 5. Simultaneously, the stem of the drainage automatic control valve 12 begins to move toward the controlled cavity until it stops and opens, resulting in that the untreated water from the water pumping zone 10 of the filtered water storage unit 6 is merged into the drainage via the valve 12, the pressure of untreated water on the wall of the elastic chamber 9 in the storage unit 6 is reduced, and the elastic chamber 9 is filled with purified water.

[0109] The process continues until the easily deformable elastic chamber 9 takes up the whole volume available for it in the housing 8 of the filtered water storage unit 6 of the storage device 5.

[0110] After completely filling the elastic chamber 9 with purified water, the pressure in the clean water pipeline starts to increase, water supply to the input of the ROM 1 is terminated. The pressure at the point upstream of the ROM 1 increases almost to the pressure in the water mains, and water flows to the input of the ROM 1, i.e., the system takes its initial position.

[0111] When the clean water tap 4 is opened, pressure drops in the clean water pipeline, the drainage automatic control valve 12 is closed and terminates the flow of unpurified water from the water pumping zone 10 of the filtered water storage unit 6 in the storage device 5 to the drainage, and the water pumping automatic control valve 11 is opened, as a result of which supplied water begins to flow through the valve 11 into the pumping zone 10 of the filtered water storage unit 6 in the storage device 5, creating there pressure applied to walls of the elastic chamber 9 and pressing out therefrom purified water (permeate) into the clean water pipeline, which purified water flows to the input of the clean water tap 4 and flows out from its spout.

[0112] At closing the clean water tap 4, pressure in the clean water line increases forcing the pumping automatic control valve 11 to close, stopping the flow of untreated water into the pumping zone 10 of the filtered water storage unit 6 in the storage device 5, and the drainage automatic control valve 12 is opened resulting in that non-treated water from the pumping zone of the water storage unit is drained off into the drainage through the valve 12, the pressure of supplied water applied to the walls of the elastic chamber 9 in the storage unit 6 is reduced, elastic chamber 9 is filled with purified filtered water.

[0113] Thus, in case of purified filtered water is required, the user then opens and closes the valve 4, and processes described above are repeated.

[0114] From the description of the proposed water purification system implemented according to the first embodiment with use of the proposed storage device according to the first embodiment, it follows that because of parallel connection of the water pumping automatic control valve 11 and the drainage automatic control valve 12 with the water pumping zone 10 in the housing 8 of the filtered water storage unit 6 in the storage device 5, in the system compared to the prototype, there are no stagnant zones, in which there is no flow of water, except one (points of connection of the clean water pipeline with inputs of controlling chambers of automatic control valves 11 and 12), in which the bacteria and microbes are developed and penetrate over time in the clean water pipeline, and deteriorate filtered water quality. That is, the use of the proposed system with the appropriate storage device provides better filtered water quality.

[0115] In addition, to implement the proposed water purification system having the proposed storage device, as the automatic valves 11 and 12 of the hydroautomatic unit 7, there are used automatic valves with elastic membranes, in which, between purified filtered water and supplied water, there is an air cavity coupled with the atmosphere, which cavity prevents the ingress of bacteria in filtered water and in the clean water tap in case of possible damage to the membrane. At the same time, controlled chambers of the automatic valves 11 and 12 each has only one input and one output as compared with three inputs/outputs of the controlled chamber in the prototype valve, which reduces the number of connections in the proposed device and enhances its reliability.

[0116] The proposed water purification system, in the general case of implementation, performed according to the second embodiment, with use of the proposed storage device performed according to the second embodiment, and also the proposed filtered water storage unit (FIGS. 2A and 2B), operates, in principle, according to the first embodiment, taking into account the following differences.

[0117] The water pumping control valve 11 and the drainage control valve 12 have the single common controlling chamber, in which inlet and outlet are connected to the clean water pipeline. When the clean water tap 4 is closed, pressure in the clean water pipeline increases, which cause reaction of the single common controlling chamber of both automatic valves, the water pumping control valve 11 is set into closed position, and drainage control valve 12 is set into open position, resulting in that untreated supplied water flows from the water pumping zone 10 of the water storage unit 6 via the valve 12 and is discharged into the drainage, the pressure of unpurified water applied to walls of the elastic chamber 9 in the storage unit 6 is reduced, and the elastic chamber 9 is filled with purified filtered water. If the clean water tap 4 is open, the pressure in the clean water pipeline drops, the water pumping control valve 11 is opened, and the drainage control valve 12 is closed, resulting in that the supplied water from the water mains enters the pumping zone 10 of the water storage unit 6 via the valve 11, puts pressure on walls of elastic chamber 9, and squeezes out the filtered water into the clean water pipeline.

[0118] Depending on the necessity of purified filtered water, the user opens and closes the clean water tap 4, and the above-described processes are repeated.

[0119] From the description of the proposed water purification system implemented according to the second embodiment with use of the proposed storage device according to the second embodiment, it follows that, in comparison with the first embodiment, combining two controlling chambers of both automatic valves (the water pumping control valve 11 and the drainage control valve 12) in a single common controlling chamber simplifies the scheme, reduces water connections, and thus reduces risk of external leakage.

[0120] At the same time, as in the first embodiment, as the automatic valves 11 and 12 of the hydroautomatic unit 7, there are used automatic valves with elastic membranes, which have controlled chambers each of which has only one input and one output, which reduces the number of connections in the inventive device as compared with the prototype and increases reliability of the inventive device. In this case also, as in the first embodiment, the controlling chamber of the automatic valves 11 and 12 of the hydroautomatic unit 7 is separated from the controlled part by the air cavity coupled with the atmosphere, which makes it impossible to flow water from one cavity to another, thus avoiding, in case of damaged membrane, unpurified water (containing bacteria and viruses) entering purified water for a user.

[0121] In addition, in the system implemented according to the second embodiment with the storage device implemented according to the second embodiment, there are completely missing stagnant zones, i.e., places where there is no flow of water, which in operation, leads, as compared with the prototype and the first embodiment, to further improvement of the quality of filtered water.

[0122] In particular implementations of the water purification system according to the first and second embodiments, when additionally including the prefilter 13 installed upstream of the reverse osmosis membrane 1, the system operates in the same way, as in the general case of its implementation, with the following differences.

[0123] The installed prefilter 13, which includes one or more prefilters for cleaning supplied water from water supply mains, purifies the supplied water from mechanical particles (e.g., sand) and/or chemical compounds (e.g., chlorine) that destroy the reverse osmosis membrane, which improves the quality of water filtration and increases the life of the reverse osmotic membrane 1, i.e., increases the life of the system as a whole.

[0124] In particular cases of the water purification system according to the first and second embodiments, when further including the hydraulically controlled shut-off valve 14 installed upstream of the reverse osmosis membrane 1 and connected to the clean water outlet pipe 2, the system operates as in the general case of its implementation, with the following differences.

[0125] The installed shut-off hydraulically controlled valve 14, in a case if there is no consumption of filtered water, and the elastic chamber 9 of the water storage unit 6 of the storage device 5 is completely filled with filtered water, terminates the flow of supplied water from the water mains to the reverse osmosis membrane 1, since otherwise untreated water passes through the membrane 1 and drains off to the drainage, i.e., protects the reverse osmosis membrane from excessive use in these cases, increases its service life, improves the quality of water filtration, increases the life of water purification systems, and provides water saving.

[0126] In particular cases of implementing the water purification system according to the first and second embodiments, when further including the additional postfilter 15 installed in the clean water line upstream of the tap 4, the system operates as in the general case of its implementation, with the following differences.

[0127] The postfilter 15 allows filtered water to be completely prepared for use by a consumer (for example, cut off extraneous odors, saturate the water with certain minerals, etc.), and improves the quality of operation of the water purification system.

[0128] In particular cases of implementing the water purification system according to the first and second embodiments, when further including the check valve 16, which is installed in the clean water line upstream of the hydroautomatic unit 7, the system operates as in the general case of its implementation, with the following differences.

[0129] Additional installation of the check valve 16 in the water purification system protects the valves 11 and 12 of the hydroautomatic unit 7 from a false triggering, when the pressure drops in the filled elastic chamber 9 of the filtered water storage unit 6 of the storage device 5, which protects the system from excessive consumption of water drained into the drainage, extends the life of reverse osmosis membrane 1, improves the quality of water filtration, and increases the life of the whole system.

[0130] In particular cases of implementing the water purification system according to the first and second embodiments, with use of the proposed storage device implemented according to the first and second embodiments, and also the proposed storage unit for filtered water (FIGS. 1A and 1B, FIGS. 2A and 2B), when the body of the elastic chamber 9 of the filtered water storage unit 6 is performed of a modified thermoplastic having biaxially-oriented structure, preferably, in particular, of the group of thermoplastic polyolefin elastomers or thermoplastic styrene elastomers, and also in other particular cases, when the body walls of the elastic chamber 9 of the filtered water storage unit 6 are at least 20% thinner than the walls of chamber neck, or preferably have a thickness of 0.1 mm to 5 mm, most preferably 0.3 mm to 2 mm, the system operates as in the general case of its implementation, with the following differences.

[0131] As specified above, the use of the modified polymer with biaxially-oriented structure as material for the body of the elastic chamber 9, which modified polymer, in particular, is preferably selected from the group of thermoplastic polyolefin elastomers or thermoplastic styrene elastomers, obtained in the manufacturing process, results in reduced fragility, increased ductility, increased bending fatigue strength, and consequently improved stability of the elastic chamber 9 of the filtered water storage unit 6 of the storage device 5 to cyclic loads during operation, and also increases barrier properties of the elastic chamber 9, thus reducing the risk of diffusing chemicals from unpurified water.

[0132] The use of the elastic chamber 9 of the filtered water storage unit 6 of the storage device 5, which has specified numerical value of the thickness of walls of its body, which are optimal for these purposes, does not affect the operation of the storage device and the water purification system according to the first and second embodiments.

[0133] To implement the group of proposed inventions, namely, the filtered water storage unit, the storage device and the water purification system, both as in the general case and in particular embodiments, there can be principally used the known and applicable in the field of water purification materials, elements and units.

[0134] For example, as the reverse osmosis membranes 1, there can be used reverse osmosis membrane ULP1812-50 produced by Vontron.

[0135] The outlet pipe 2 for the clean water line and drainage 3 can be performed, for example, of polyethylene tube (6.35 mm) produced by John Guest.

[0136] As the clean water tap 4, there can be used, for example, the tap F1207A produced by Dafeng.

[0137] In the filtered water storage unit 6, the housing 8 can be performed, for example, of polypropylene BD31 OMO produced by Borealis, and the elastic chamber 9 can be performed of thermoplastic Dryflex 600601 produced by Nolato Elastotechnic.

[0138] As the prefilter 13, there can be used, for example, the replaceable filtering module R1-02 produced by Aquaphor.

[0139] As the shut-off hydraulically operated valve 14, there can be used, for example, the shut-off valve H-V1050B-QC produced by Applied membranes, Inc..

[0140] As the postfilter 15, there can be used, for example, the replaceable filtering module K1-07 produced by Aquaphor.

[0141] As the check valve 16, there can be used, for example, the check valve 3/8SCV produced by John Guest.

[0142] FIGS. 4A and 4B show the example of a constructive implementation of the automatic valves of the hydroautomatic unit 7 used in the first embodiment of the water purification system with the storage device according to the first embodiment:

[0143] a) drainage automatic control valve 12 (FIG. 4A); and

[0144] b) water pumping automatic control valve 11 (FIG. 4B).

[0145] These valves are designed by Aquaphor on the basis of the known membrane type valves (for example, valve H-V1050B-QC produced by Applied membranes, Inc.), which basic components are likely performed.

[0146] Components in FIGS. 4A and 4B are defined as follows: [0147] 17body; [0148] 18cover; [0149] 19spring; [0150] 20rod; [0151] 21ring; [0152] 22ring; [0153] 23insert; [0154] 24bush; [0155] 25membrane; [0156] 26rod; [0157] 27clamp; [0158] 28cover; [0159] 29rod; and [0160] 30bush.

[0161] FIG. 5 shows the example of constructive implementation of automatic valves of the hydroautomatic unit 7 used in the second embodiment of the water purification system with the storage device according to the second embodiment. These valves (the water pumping control valve 11 and the drainage control valve 12) in the present embodiment are constructively combined and have a single controlling chamber, and developed by Aquaphor also based on the known membrane-type valves (e.g., valve H-V1050B-QC produced by Applied membranes, Inc.), which have similar base components.

[0162] Components in the FIG. 5 are defined as follows: [0163] 18cover; [0164] 19spring; [0165] 20rod; [0166] 21ring; [0167] 22ring; [0168] 23insert; [0169] 24bush; [0170] 25membrane; [0171] 26rod; [0172] 27clamp; [0173] 28cover; [0174] 29rod; [0175] 30bush; and [0176] 31housing.

[0177] Components shown in FIGS. 4A, 4B, and 5 can be performed of engineering plastics by the bulk forming method in thermoplastic injection-molding machines, excepting the following: [0178] Spring 19 can be performed of material resistant to corrosion (e.g., stainless steel) by wire winding; [0179] Rings 21, 22 and membrane 25 may be performed by the bulk forming method of silicone rubber or thermoplastic elastomer.