CN217676922U

CN217676922U - Water purification system

Info

Publication number: CN217676922U
Application number: CN202220588591.9U
Authority: CN
Inventors: 吉田宪幸; 木本政次
Original assignee: AQUARS (SHANGHAI) Inc
Current assignee: AQUARS (SHANGHAI) Inc
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-10-28
Anticipated expiration: 2032-03-18

Abstract

The utility model discloses a water purification system, it includes RO membrane filter, water intake pipe, water purification pipeline, mixes water pipe way, restriction valve, and this water purification system still includes: the water inlet valve is arranged on the water inlet pipeline; a flushing pipeline, one end of which is communicated with the water inlet of the RO membrane filter, and the other end is communicated with the atmosphere or a purified water source, and the flushing pipeline is also provided with a first open-close valve; and one end of the mixed water discharge pipeline is communicated with the mixed water discharge port of the RO membrane filter, the other end of the mixed water discharge pipeline is communicated with the wastewater discharge port, and the mixed water discharge pipeline is also provided with a second opening and closing valve. Adopt the utility model provides high water purification system's water purification quality prolongs RO membrane filter's life-span, still can improve system's reliability simultaneously.

Description

Water purification system

Technical Field

The utility model relates to a water purification system, concretely relates to adopt water purification system of RO membrane filter.

Background

Water purification systems using RO membrane filters are already widespread in existing water purification systems. However, when the conventional water purification system is not used, the RO membrane filter adopted by the conventional water purification system is soaked in concentrated water (or called mixed water), minerals in high-concentration mixed water are easy to precipitate and scale on the surface of the precise RO membrane and in a flow channel to cause the blockage and damage of the RO membrane, the service life of the RO membrane is reduced, and meanwhile, the TDS value in the mixed water becomes very high. This not only results in water waste, but also allows the user to wait. Therefore, various technologies including cleaning of RO membrane filters have been proposed in the prior art as disclosed in patent document CN 203360148U. Adopted pressure bucket and various solenoid valves among this technical scheme, the existence washes the unit and constitutes complicacy and system and the unable work scheduling problem of washing unit when outage (power failure), simultaneously, it washes the process and carries out the water purification process the same with carrying out through RO membrane filter, the concentrated water (mixing water promptly) of discharge RO membrane filter need just can discharge through behind the waste water ratio (being current-limiting valve or choke valve promptly), therefore, wash and can not thoroughly go on, concentrated water (mixing water promptly) still can remain in RO membrane filter with the certain proportion, after placing night, the muddy water of higher TDS value still can permeate water purification one side, after RO membrane filter reworks, the problem that quality of water can not reach standard or let the user wait still appears.

In addition, in the water purification system of the prior art including patent document CN203360148U, there is basically no water inlet valve specially installed on the side of the water supply source, so that during the non-operation period of the system, the pipeline and the component devices in the system are always under the pressure from the water supply source, and the system often leaks in the long term, which affects the reliability and the service life of the system.

SUMMERY OF THE UTILITY MODEL

The utility model provides a quality that can improve the water purification in view of the above-mentioned problem that exists among the prior art at present, prolongs the life-span of RO membrane filter, can improve the water purification system of reliability.

The utility model provides a first water purification system, which is a water purification system comprising an RO membrane filter and is provided with a water inlet pipeline, a water purification pipeline and a water mixing pipeline, wherein one end of the water inlet pipeline is connected with a water supply source, and the other end of the water inlet pipeline is connected with a water inlet of the RO membrane filter; one end of the purified water pipeline is connected with the purified water outlet of the RO membrane filter, and the other end of the purified water pipeline is connected with the purified water supply port; mix water pipeline, its one end and RO membrane filter mix the water discharge port and be connected and the other end is connected with the waste water discharge port, and be connected with the restriction valve on this mixes water pipeline, its characterized in that, this water purification system still includes: a water inlet valve disposed on the water inlet line; a flushing pipeline, one end of which is communicated with the water inlet of the RO membrane filter, and the other end of which is communicated with the atmosphere or a purified water source, and the flushing pipeline is also provided with a first open-close valve; and one end of the mixed water leakage pipeline is communicated with the mixed water outlet of the RO membrane filter, the other end of the mixed water leakage pipeline is communicated with the waste water outlet, and the mixed water leakage pipeline is also provided with a second opening and closing valve.

Preferably, the water inlet valve, the first open/close valve and the second open/close valve are arranged to be interlocked, and when the water inlet valve is closed, the first open/close valve and the second open/close valve are opened; and when the water inlet valve is opened, the first open-close valve and the second open-close valve are closed.

In a further preferred embodiment, the water inlet valve, the first opening/closing valve, and the second opening/closing valve are combined together to form an integrated multi-way valve.

In addition, as a preferable water purification system, the water purification system further comprises a water outlet valve which is arranged on the water purification pipeline.

As a further preferred aspect of the preferred water purification system, the water inlet valve, the water outlet valve, the first open-close valve, and the second open-close valve are arranged to be interlocked, and when the water outlet valve is closed, the water inlet valve is also closed, and the first open-close valve and the second open-close valve are opened; when the outlet valve is opened, the inlet valve is also opened, and the first open-close valve and the second open-close valve are closed.

As a further preferable technical scheme, the water inlet valve and the water outlet valve are combined together to adopt an integrated multi-way valve.

As a further preferable technical scheme in all the water purification systems, the purified water source is a purified water storage tank, a water outlet of the purified water storage tank is communicated with the other end of the flushing pipeline, and a water inlet of the purified water storage tank is communicated with the purified water pipeline.

Wherein, the purified water storage tank is also provided with a first air inlet and a third opening and closing valve for opening and closing the first air inlet.

The third opening/closing valve is provided to be interlocked with the first opening/closing valve, and is opened when the first opening/closing valve is opened; when the first opening/closing valve is closed, the third opening/closing valve is also closed.

In addition, as the technical scheme of replacing the purified water source, the purified water source is a water storage pipeline, one end of the water storage pipeline is communicated with the other end of the flushing pipeline, and the other end of the water storage pipeline is communicated with the purified water pipeline.

As a further preferable aspect in all of the water purification systems described above, a point of time at which the first open-close valve is opened is set to lag a point of time at which the water feed valve is closed, and lag a point of time at which the second open-close valve is opened.

In addition, the shell on the water inlet side of the RO membrane filter can be provided with a second air inlet and a fourth opening and closing valve for opening and closing the second air inlet.

As a further preferable embodiment of all the water purification systems described above, the water purification system further includes a controller having a timer for controlling opening and closing of each valve, wherein the controller is configured to start timing by touching the timer when the water inlet valve is closed, and to control the first open/close valve and the second open/close valve to be opened when the closed water inlet valve is not reopened even after a first predetermined time has elapsed, and to stop timing of the timer and clear an existing timing after a second predetermined time has elapsed from the timing of the timer; and when the closed water inlet valve is not opened again after the first set time, the controller stops the timing of the triggered timing timer and clears the existing timing.

According to the utility model discloses a water purification system can improve the quality of water purification and the reliability of system, can also prolong RO membrane filter's life-span simultaneously.

Drawings

Fig. 1 is a schematic diagram showing a configuration of a water purification system according to a first embodiment of the present invention.

Fig. 2 is a schematic diagram showing a configuration of a water purification system according to another modification of the first embodiment of the present invention.

Fig. 3 is a schematic diagram showing a configuration of a water purification system according to another preferred modification of the first embodiment of the present invention.

Fig. 4 is a schematic diagram showing a configuration of a water purification system according to a second embodiment of the present invention.

Fig. 5 is a schematic diagram showing a water purification system according to another modification of the second embodiment of the present invention.

Fig. 6 is a schematic diagram showing a configuration of a water purification system according to another preferred modification of the second embodiment of the present invention.

Fig. 7 is a schematic diagram showing a configuration of a water purification system according to another modification of the second embodiment of the present invention.

Fig. 8 is a schematic diagram showing a configuration of a water purification system according to another modification of the second embodiment of the present invention.

Fig. 9 is a schematic diagram showing a configuration of a water purification system according to another modification of the second embodiment of the present invention.

Detailed Description

The following explains the constitution of the water purification system of the present invention with reference to the drawings.

(first embodiment)

Fig. 1 is a schematic diagram showing a configuration of a water purification system according to a first embodiment of the present invention. As shown in fig. 1, a water purification system 10 of the present embodiment is a water purification system including an RO membrane filter 11, and a pretreatment filter 14 and a first check valve 15 are connected to a water inlet line 13 having one end connected to a tap water pipe 12 as a water supply source and the other end connected to a water inlet 11a of the RO membrane filter; a post-filter 18 is connected to a clean water pipe 17 having one end connected to the clean water outlet 11b of the RO membrane filter and the other end connected to the clean water supply port 16, and a restriction valve 21 is connected to a mixed water pipe 20 having one end connected to the mixed water outlet 11c of the RO membrane filter and the other end connected to the waste water outlet 19. The first check valve 15 is configured to allow only the water in the water inlet line 13 to flow toward the RO membrane filter 11, and prevent the water in the water inlet line 13 from flowing toward the pretreatment filter 14 (i.e., the feed water source).

This water purification system 10 still includes: a water inlet valve 22, a flushing line 23 and a mixed water drainage line 24. Wherein the inlet valve 22 is arranged on the inlet pipeline 13. One end of the flushing pipeline 23 is connected to the water inlet pipeline 13 communicated with the RO membrane filter water inlet 11a so as to be communicated with the RO membrane filter water inlet 11 a; the other end of the flushing line 23 is connected to the atmosphere, and a first on-off valve 25 is provided in the flushing line 23. The mixed water drainage pipeline 24 has one end connected to the mixed water pipeline 20 communicated with the RO membrane filter mixed water discharge port 11c so as to communicate with the RO membrane filter mixed water discharge port 11 c; the other end of the mixed water discharge line 24 is connected to the mixed water line 20 communicated with the waste water outlet 19 to communicate with the waste water outlet 19, and a second opening/closing valve 26 is further provided on the mixed water discharge line 24.

In addition, in this embodiment, when the water purification system 10 is installed, the flushing pipe 23 (and the other end thereof communicating with the atmosphere) is disposed at a position higher than the RO membrane filter 11, and the mixed water drain pipe 24 (and the waste water discharge port 19 communicating therewith) is disposed at a position lower than the RO membrane filter 11.

In the water purification system 10 configured as described above, in a normal use state (i.e., a state in which the user opens the inlet valve 22), the first on-off valve 25 and the second on-off valve 26 are always kept in a closed state, the tap water is filtered by the pre-treatment filter 14 through the inlet pipe 13 and then enters the RO membrane filter 11, the tap water is purified by the RO membrane filter 11, and then the purified water is re-filtered by the post-filter 18 through the purified water pipe 17 and discharged from the purified water supply port 16 for use by the user. At this time, after the tap water is purified by the RO membrane filter 11, the mixed water flows through the water mixing line 20 and the flow restriction valve 21, and is discharged from the waste water discharge port 19. After the user closes the inlet valve 22 without using clean water, the first opening/closing valve 25 and the second opening/closing valve 26 are sequentially opened, so that the mixed water in the RO membrane filter 11 can be drained from the RO membrane filter mixed water outlet 11c through the mixed water line 20, the mixed water drain line 24, and the waste water outlet 19 in a free-fall manner. After the user waits for the mixed water in the RO membrane filter 11 to be drained, the first opening/closing valve 25 and the second opening/closing valve 26 are closed. Therefore, the operation of emptying the mixed water in the RO membrane filter 11 can be performed when the purified water is used at end every night, for example, so that no mixed water is accumulated in the RO membrane filter 11 until the purified water is used in the next day, and the problems that the TDS value of the purified water which is just used in the next day exceeds the standard or the purified water which takes time to wait for the TDS value not to exceed the standard due to the accumulated mixed water can be prevented. Alternatively, the above operation may be performed after a certain time (e.g. 2 to 4 hours) and used for a plurality of times (e.g. 3 to 6 times), so as to ensure that the TDS value of the mixed water in the RO membrane filter 11 is always at a low level at any time.

The water purification system 10 of the present embodiment is provided with the flushing line 23 and the first on-off valve 25 which are connected to the atmosphere, and the purpose of the flushing line is to allow air to enter the RO membrane filter 11 when the second on-off valve 26 is opened to discharge the mixed water in the RO membrane filter 11, so that the mixed water can be quickly and thoroughly evacuated from the RO membrane filter 11.

As a preferred modification of the present embodiment, the feed valve 22, the first open-close valve 25, and the second open-close valve 26 are provided in association, and when the feed valve 22 is closed, the first open-close valve 25 and the second open-close valve 26 are opened; when the feed valve 22 is opened, the first open-close valve 25 and the second open-close valve 26 are closed. In this way, the mixed water in the RO membrane filter 11 is drained once every time the user closes the water inlet valve 22 after using up the clean water.

As for the linkage manner of the water inlet valve 22, the first open/close valve 25 and the second open/close valve 26 in the above modification, for example, it is possible to combine the water inlet valve 22, the first open/close valve 25 and the second open/close valve 26 together to use an integral multi-way valve, which is advantageous in that the object of the present invention can be simply achieved just like opening and closing a faucet, and required parts and installation operations thereof can be reduced. The feed valve 22, the first opening/closing valve 25, and the second opening/closing valve 26 may be all solenoid valves, and may be controlled by a controller (not shown) to be interlocked with each other.

Fig. 2 is a schematic diagram showing a configuration of a water purification system according to another modification of the first embodiment of the present invention. As another modification of the present embodiment, as shown in fig. 2, a special check valve is used as the first opening/closing valve 25, which does not allow the water in the flushing line 23 to flow to the other end of the flushing line 23 communicating with the atmosphere, and allows the air introduced from the other end of the flushing line 23 to enter the RO membrane filter 11 through the check valve and the flushing line 23. For example, the check valve is closed when a certain water pressure exists in the flushing line 23, and is opened when the water pressure in the flushing line 23 is lower than a predetermined pressure after the water inlet valve 22 is closed and the second opening/closing valve 26 is opened, so that air enters. In this modification, the water inlet valve 22 and the first on-off valve 25 may be controlled, and the water inlet valve 22 and the first on-off valve 25 may be interlocked with each other. Thus, the control of the water purification system 10 of the present invention can be simplified.

Fig. 3 is a schematic diagram showing a configuration of a water purification system according to another preferred modification of the first embodiment of the present invention. As another preferred modification of this embodiment, as shown in fig. 3, the water purification system 10 of the present invention further includes a water outlet valve 27 disposed on the purified water pipeline 17. Specifically, the outlet valve 27 is provided on the clean water line 17 between the clean water supply port 16 and the post-filter 18 and near the clean water supply port 16. In this way, the after-filter 18 can be prevented from coming into contact with the air for a long time and from growing bacteria when no clean water is used (i.e. no clean water is present in the clean water line 17). In this modification, the inlet valve 22, the outlet valve 27, the first on-off valve 25, and the second on-off valve 26 may be arranged to be interlocked, and when the outlet valve 27 is closed, the inlet valve 22 is also closed, and the first on-off valve 25 and the second on-off valve 26 are opened; when the outlet valve 27 is opened, the inlet valve 22 is also opened, and the first open-close valve 25 and the second open-close valve 26 are closed.

As for the linkage manner of the inlet valve 22, the first opening/closing valve 25, the second opening/closing valve 26 and the outlet valve 27 in the above modification, for example, it is possible to realize the linkage manner by combining the inlet valve 22, the first opening/closing valve 25, the second opening/closing valve 26 and the outlet valve 27 together by using an integrated multi-way valve, which is advantageous in that the object of the present invention can be simply achieved just like opening/closing a faucet, and required parts and installation operations thereof can be reduced. The water inlet valve 22, the first opening/closing valve 25, the second opening/closing valve 26, and the water outlet valve 27 may be controlled by a controller (not shown) using electromagnetic valves to be interlocked with each other.

In the configuration of the present embodiment and the modified examples, the pretreatment filter 14, the first check valve 15, and the post-filter 18 are not essential and may be omitted.

According to the configuration of the present embodiment and the modification, the water purification system 10 can manually empty the mixed water in the RO membrane filter 11 without using an electromagnetic valve.

(second embodiment)

Fig. 4 is a schematic diagram showing a configuration of a water purification system according to a second embodiment of the present invention. As shown in fig. 4, the water purification system 30 of the present embodiment differs from the first embodiment in that the other end of the flushing line 23 is not in communication with the atmosphere, but in communication with a purified water source, and therefore, the same parts as those of the first embodiment will be given the same reference numerals, and the description of the same parts will be omitted.

As shown in fig. 4, the water purification system 30 of the present embodiment further includes a purified water storage tank 31 as a purified water source, a water outlet 31a of the purified water storage tank 31 is communicated with the other end of the flushing pipe 23, and a water inlet 31b of the purified water storage tank 31 is communicated with the purified water pipe 17 through a water storage pipe 32. In this embodiment, when the water purification system 30 is installed, the purified water storage tank 31 is disposed at a position higher than the RO membrane filter 11. The capacity of the purified water storage tank 31 is not particularly limited, and is usually set to be equal to or greater than the capacity of the RO membrane filter 11 (or the capacity of the mixed water in the RO membrane filter 11).

In the water purification system 30 configured as described above, in a normal use state (i.e., a state in which the user opens the inlet valve 22), the first on-off valve 25 and the second on-off valve 26 are always kept in a closed state, the tap water is filtered by the pre-treatment filter 14 through the inlet pipe 13 and then enters the RO membrane filter 11, the tap water is purified by the RO membrane filter 11, the purified water is re-filtered by the post-filter 18 through the purified water pipe 17 and then discharged from the purified water supply port 16 for use by the user, and the purified water is re-filtered by the post-filter 18 through the purified water pipe 17 and then enters the purified water storage tank 31 from the inlet 31b through the water storage pipe 32 until the purified water storage tank 31 is filled. On the other hand, after the tap water is purified by the RO membrane filter 11, the mixed water passes through the flow restriction valve 21 through the mixed water line 20 and is discharged from the waste water discharge port 19.

After the user closes the inlet valve 22 without using the clean water, the first on-off valve 25 and the second on-off valve 26 are sequentially opened, so that the mixed water in the RO membrane filter 11 is discharged by free fall from the RO membrane filter mixed water discharge port 11c through the mixed water line 20, the mixed water drain line 24, and the waste water discharge port 19, and the clean water in the clean water storage tank 31 flows from the water outlet 31a through the first on-off valve 25 and the flushing line 23 into the RO membrane filter 11 to flush the RO membrane filter 11. After the user waits for the RO membrane filter 11 to be flushed and the mixed water in the RO membrane filter 11 to be drained, the first opening/closing valve 25 and the second opening/closing valve 26 are closed. Therefore, the RO membrane filter 11 is flushed and the mixed water in the RO membrane filter 11 is drained, for example, the operation can be performed when the pure water is used at night every day, so that it can be ensured that no mixed water is accumulated in the RO membrane filter 11 until the pure water is used in the next day, and the problems that the TDS value of the pure water which is just used in the next day exceeds the standard or the pure water which needs to wait for the TDS value not to exceed the standard needs to be caused due to the accumulated mixed water can be prevented. Alternatively, the above operation may be performed after a certain time (e.g. 2 to 4 hours) for a plurality of times (e.g. 3 to 6 times), so as to ensure that the TDS value of the mixed water in the RO membrane filter 11 is always at a low level at any time.

The water purification system 30 of this embodiment is provided with the water purification storage tank 31 for washing, and through gravity, the purified water in the water purification storage tank 31 flows into the RO membrane filter 11, not only can the mixed water in the RO membrane filter 11 be extruded out rapidly and thoroughly, but also the inner wall of the RO membrane filter 11 can be washed, so that the RO membrane filter 11 is always kept in a cleaner state.

Also, as a preferred modification of the present embodiment, the feed valve 22, the first open-close valve 25, and the second open-close valve 26 may be provided in linkage, and when the feed valve 22 is closed, the first open-close valve 25 and the second open-close valve 26 are opened; when the feed valve 22 is opened, the first open-close valve 25 and the second open-close valve 26 are closed. In this way, after the user closes the water inlet valve 22 every time the user runs out of clean water, the mixed water in the RO membrane filter 11 is drained and the inner wall of the RO membrane filter 11 is washed once.

The above modified example is similar to the first embodiment in the manner of linkage of the feed valve 22, the first open/close valve 25, and the second open/close valve 26.

Fig. 5 is a schematic diagram showing a water purification system according to another modification of the second embodiment of the present invention. As another modification of the present embodiment, as shown in fig. 5, the purified water storage tank 31 is provided with a first air inlet 31c and a third opening/closing valve 33 for opening and closing the first air inlet 31 c. The third opening/closing valve 33 may be provided so as to be interlocked with the first opening/closing valve 25, and the third opening/closing valve 33 may be opened when the first opening/closing valve 25 is opened; when the first opening/closing valve 25 is closed, the third opening/closing valve 33 is also closed. The first air inlet 31c is provided above the purified water storage tank 31 at a position higher than the maximum level of purified water in the purified water storage tank 31. When the first on-off valve 25 is thus opened and the fresh water in the fresh water storage tank 31 is ready to flow into the RO membrane filter 11, the third on-off valve 33 is opened to allow air to enter the fresh water storage tank 31, so that the fresh water can flow into the RO membrane filter 11 quickly without being affected by negative pressure or the like.

Fig. 6 is a schematic diagram showing a configuration of a water purification system according to another preferred modification of the second embodiment of the present invention. As another preferred modification of this embodiment, as shown in fig. 6, the water purification system 30 of the present invention may also include a water outlet valve 27 disposed on the water purification pipeline 17. Specifically, the outlet valve 27 is provided on the clean water line 17 between the clean water supply port 16 and the post-filter 18 and near the clean water supply port 16. In this way, the after-filter 18 is prevented from coming into contact with the air for a long time when no clean water is used (i.e. no clean water is present in the clean water line 17) and from bacteria. The position of the outlet valve 27 may be preferably a position between the post-filter 18 and a communication part 32a where the storage water pipe 32 communicates with the clean water pipe 17, so that the clean water storage tank 31 can communicate with the atmosphere through the storage water pipe 32, the clean water pipe 17 and the clean water supply port 16 even when the outlet valve 27 is closed, and the clean water can smoothly and rapidly flow into the RO membrane filter 11 when the third opening/closing valve 33 is not provided. In this modification, the inlet valve 22, the outlet valve 27, the first opening/closing valve 25, and the second opening/closing valve 26 may be provided in association with each other in the same manner as in the first embodiment.

Fig. 7 is a schematic diagram showing a configuration of a water purification system according to another modification of the second embodiment of the present invention. As another modification of this embodiment, as shown in fig. 7, the water purification system 30 of the present invention further includes a washing booster pump 34 disposed on the water inlet pipe 13 between the water purification storage tank 31 and the RO membrane filter 11, for providing a higher pressure to the water for washing the RO membrane filter 11 to improve the washing effect.

Fig. 8 is a schematic diagram showing a configuration of a water purification system according to another modification of the second embodiment of the present invention. As another modification of this embodiment, as shown in fig. 8, the water purification system 30 of the present invention omits the purified water storage tank 31 as a purified water source, and directly uses the water storage line 32 as a purified water source, that is, one end of the water storage line 32 is directly communicated with the other end of the flushing line 23, and the other end of the water storage line 32 is communicated with the purified water line 17 at the communication portion 32 a. In this modification, the water storage line 32 is provided at a position higher than the RO membrane filter 11 when the water purification system 30 is installed. The water storage amount in the water storage line 32 is not particularly limited, and is usually set to be equal to or greater than the capacity of the RO membrane filter 11 (or the capacity of the mixed water in the RO membrane filter 11). Therefore, the length and thickness of the water storage pipe 32 can be selected according to this principle. In this modification, as shown in fig. 9, the housing on the side of the RO membrane filter inlet may be modified so that a second inlet port 11d and a fourth opening/closing valve 35 for opening and closing the second inlet port 11d are opened. And the fourth opening/closing valve 35 is provided in association with the first opening/closing valve 25. In this way, air can enter the RO membrane filter 11 in time, so that the mixed water can be quickly and thoroughly evacuated from the RO membrane filter 11. In the modification shown in fig. 8 and 9, the outlet valve 27 may be provided in the fresh water pipe 17 in the same manner as in the modification shown in fig. 6.

In the configurations of the present embodiment and the modified examples, the pretreatment filter 14, the first check valve 15, and the post-filter 18 are not essential, and may be omitted.

According to the configuration of the present embodiment and the modification, the water purification system 30 can manually empty the mixed water in the RO membrane filter 11 without using an electromagnetic valve.

In addition, as a common modification of the first and second embodiments, the

water purification system

10, 30 of the present invention may further include a water inlet pressurizing pump (not shown) disposed on the water inlet pipe 13, for pressurizing the water to be purified entering the RO membrane filter 11 when the feed water pressure of the tap water is low, so as to ensure the purification capacity of the RO membrane filter 11. In a modification of the second embodiment which employs the rinse booster pump, the object of the feed water booster pump may be achieved by the rinse booster pump.

In addition, the water supply source may be a water tower, a water tank, or the like, in addition to tap water.

In addition, the pre-treatment filter 14 and the post-filter 18 may be filter units each composed of a plurality of stages of filters.

In addition, the first check valve can also be replaced by an electromagnetic valve. The valve is not particularly limited as long as it can prevent the mixed water in the RO membrane filter 11 or the purified water in the purified water storage tank 31 from flowing back to the pretreatment filter 14 during the process of emptying the mixed water and rinsing the RO membrane filter 11.

In addition, the time point at which the first open-close valve 25 is opened may be set to lag the time point at which the feed valve 22 is closed and lag the time point at which the second open-close valve 26 is opened. This prevents the water in the water inlet line 13 or the RO membrane filter 11 from overflowing through the first on-off valve 25.

In addition, the

water purification system

10, 30 of the present invention may further include a controller (not shown) having a timer for controlling the opening and closing of each valve, wherein the controller is configured to trigger the timer to start timing when the water inlet valve 22 is closed, and when the closed water inlet valve 22 is not reopened after a first predetermined time t1 (e.g., 2 to 4 hours), the controller controls the first on-off valve 25 and the second on-off valve 26 to be opened, and then after the timer has timed for a second predetermined time t2 (e.g., 10 seconds to 2 minutes), the controller controls the first on-off valve 25 and the second on-off valve 26 to be closed, and simultaneously, the timer is stopped and the existing timing is cleared; when the closed water inlet valve 22 is not opened again after the first predetermined time t1, the controller stops the timer of the triggered timer and clears the timer. In this way, the cycle frequency and time for emptying the mixed water in the RO membrane filter 11 or flushing the RO membrane filter 11 with the clean water can be reasonably set by setting the first predetermined time t1 and the second predetermined time t2, so as to ensure that the TDS value in the mixed water in the RO membrane filter 11 is always kept at a low level, thereby improving the quality of the clean water.

Adopt the utility model discloses a

water purification system

10, 30 can overcome the problem among the prior art with simple constitution and mode, not only guarantee and improve the quality of water purification, can also prolong RO membrane filter's life-span. Meanwhile, because the water inlet valve is arranged and the water inlet valve is closed when the purified water is stopped, pipelines and element devices in the system are not always under the pressure from a water supply source during the non-working period of the system, the problem that the system is easy to leak in the prior art can be prevented, and the reliability and the service life of the system are improved.

Claims

1. A water purification system comprises an RO membrane filter and is provided with a water inlet pipeline, a water purification pipeline and a water mixing pipeline, wherein one end of the water inlet pipeline is connected with a water supply source, and the other end of the water inlet pipeline is connected with a water inlet of the RO membrane filter; one end of the purified water pipeline is connected with the purified water outlet of the RO membrane filter, and the other end of the purified water pipeline is connected with the purified water supply port; mix water pipeline, its one end and RO membrane filter mix the water discharge port and be connected and the other end is connected with the waste water discharge port, and be connected with the restriction valve on this mixes water pipeline, its characterized in that, this water purification system still includes:

a water inlet valve arranged on the water inlet pipeline;

a flushing pipeline, one end of which is communicated with the water inlet of the RO membrane filter, and the other end of which is communicated with the atmosphere or a purified water source, and the flushing pipeline is also provided with a first open-close valve;

and one end of the mixed water discharge pipeline is communicated with the mixed water discharge port of the RO membrane filter, the other end of the mixed water discharge pipeline is communicated with the wastewater discharge port, and the mixed water discharge pipeline is also provided with a second opening and closing valve.

2. The water purification system of claim 1,

the water inlet valve, the first open-close valve and the second open-close valve are arranged in linkage, and when the water inlet valve is closed, the first open-close valve and the second open-close valve are opened; and when the water inlet valve is opened, the first open-close valve and the second open-close valve are closed.

3. The water purification system of claim 2,

the water inlet valve, the first opening and closing valve and the second opening and closing valve are combined together to adopt an integrated multi-way valve.

4. The water purification system of claim 1, further comprising:

and the water outlet valve is arranged on the purified water pipeline.

5. The water purification system of claim 4,

the water inlet valve, the water outlet valve, the first opening and closing valve and the second opening and closing valve are arranged to be linked, when the water outlet valve is closed, the water inlet valve is also closed, and the first opening and closing valve and the second opening and closing valve are opened; when the outlet valve is opened, the inlet valve is also opened, and the first open-close valve and the second open-close valve are closed.

6. The water purification system of claim 5,

the water inlet valve and the water outlet valve are combined together to adopt an integrated multi-way valve.

7. The water purification system of any one of claims 1 to 6,

the water purification source is a water purification water storage tank, the water outlet of the water purification water storage tank is communicated with the other end of the flushing pipeline, and the water inlet of the water purification water storage tank is communicated with the water purification pipeline.

8. The water purification system of claim 7,

the purified water storage tank is provided with a first air inlet and a third opening and closing valve for opening and closing the first air inlet.

9. The water purification system of claim 8,

a third opening/closing valve provided to be interlocked with the first opening/closing valve, the third opening/closing valve being opened when the first opening/closing valve is opened; when the first opening/closing valve is closed, the third opening/closing valve is also closed.

10. The water purification system of any one of claims 1 to 6,

the water purification source is a water storage pipeline, one end of the water storage pipeline is communicated with the other end of the flushing pipeline, and the other end of the water storage pipeline is communicated with the water purification pipeline.

11. The water purification system of any one of claims 1 to 6,

a time point at which the first open-close valve is opened is set to lag behind a time point at which the water feed valve is closed and lag behind a time point at which the second open-close valve is opened.

12. The water purification system of claim 7,

the point of time at which the first open-close valve is opened is set to lag the point of time at which the water feed valve is closed and lag the point of time at which the second open-close valve is opened.

13. The water purification system of claim 10,

14. The water purification system of claim 10,

and a second air inlet and a fourth opening and closing valve for opening and closing the second air inlet are formed in the shell on one side of the water inlet of the RO membrane filter.

15. The water purification system of any one of claims 1 to 6, further comprising:

a controller with a timer for controlling the opening and closing of each valve, wherein the controller is configured to trigger the timer to start timing when the water inlet valve is closed, and when the closed water inlet valve is not reopened after a first predetermined time, the controller controls the first on-off valve and the second on-off valve to be opened, and after the timing of the timer passes a second predetermined time, the controller controls the first on-off valve and the second on-off valve to be closed, and simultaneously stops the timing of the timer and clears the existing timing; and when the closed water inlet valve is not opened again after the first set time, the controller stops the timing of the triggered timing timer and clears the existing timing.