CN110845030A - Water purification system and water purification unit - Google Patents

Abstract

The invention relates to the field of water purification, and discloses a water purification system and water purification equipment. The water purification system includes a main pipe, the main pipe is sequentially connected with a first filter element and a second filter element in series, and the main pipe is further A switching pipeline is connected, a switching valve is arranged on the switching pipeline, and the switching pipeline is set to pass the switch of the switching valve so that the water in the main pipeline passes through the first filter element and the second filter in sequence. Switching between a first working mode in which two filter elements perform filtration and a second working mode in which filtering is performed only through one of the first filter element and the second filter element. The water purification system and the water purification equipment provided by the invention can maximize the water output on the premise of ensuring the water quality, and can better meet the needs of users.

Description

Water purification system and water purification equipment

technical field

The invention relates to the field of water purification, in particular to a water purification system and water purification equipment.

Background technique

In order to solve the problem of healthy drinking water, various types of water purification equipment have been born in the market in recent years. Among them, RO pure water machine (or RO reverse osmosis pure water machine/RO water purifier) is a water purifier that uses the principle of reverse osmosis technology to filter water. Depending on the characteristics of the RO membrane, the ions in the water on both sides of the RO membrane will slowly diffuse to an equilibrium state. When the downtime exceeds two hours, the ions in the concentrated water before the RO membrane and the ions in the pure water after the RO membrane will be reduced. close to equilibrium. Since the capacity of pure water in the ordinary 400G RO membrane filter element is about 500mL (generally speaking, the larger the flux, the more pure water in the filter element), and the amount of water taken by the user each time the water purifier is turned on is about 500mL. This makes the water flowing out of the water purifier every time the water is produced is the pure water at the back end of the RO membrane, resulting in the TDS (Total dissolved solids, total dissolved solids) deviation of the first cup of water due to ion diffusion after a period of shutdown. High problem, the water quality cannot meet the required requirements, affecting the use of users. In addition, the desalination rate of RO membranes of large flux water purifiers in the existing market is generally 90%. In areas with very poor water quality (high TDS of tap water), the purity of pure water produced by single-stage RO membrane water purifiers It is not very high and cannot meet the needs of users. In addition, in areas with better water quality, if a two-stage series RO membrane system is used, the effluent flow will be low, which cannot meet the needs of users who have a large amount of water.

Therefore, there is a need to design a water purification system that can maximize water output while ensuring water quality.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the problems of the prior art that the water quality cannot be guaranteed or the water output is small, and provide a water purification system that can maximize the water output on the premise of ensuring the water quality.

Another object of the present invention is to provide a water purification apparatus including the above water purification system.

In order to achieve the above object, one aspect of the present invention provides a water purification system, the water purification system includes a main circuit, the main circuit is connected with a first filter element and a second filter element in series, and the main circuit is also connected with a switch The switching pipeline is provided with a switching valve, and the switching pipeline is set so that the water in the main pipeline passes through the first filter element and the second filter element in sequence through the switch of the switching valve. Switching between a first working mode of filtering and a second working mode of filtering through only one of the first filter element and the second filter element.

In the above technical solution, when the water purification system is in the first working mode in which the first filter element and the second filter element are sequentially filtered, the ion diffusion between the concentrated water (wastewater) and the pure water in the first filter element is limited to The inside of the first filter element will not diffuse into the second filter element, so it can solve the problem that the TDS of the first cup of water flowing out from the outlet of the main pipeline is too high. In a better area (the water in this area can generally be filtered by a filter element to meet the purification requirements), wait for the water purification system to run in the first working mode for a set time (for example, 1 minute, the set time can be based on the water quality test. After the data is adjusted), the switching pipeline can switch the water purification system from the first working mode by switching the valve switch, so that the water entering from the water inlet of the main pipeline only passes through one of the first filter element and the second filter element The second working mode of filtration can not only ensure the water quality at this time, but also will not have the problem of small water output when the first filter element and the second filter element are used in series, which can meet the needs of a large amount of water; In poor areas, the first filter element and the second filter element can always be used in series to ensure that the water quality meets the requirements. The water purification system of the present invention can maximize the water output on the premise of ensuring the water quality, and can better meet the needs of users.

Preferably, the switching pipeline includes a first switching pipeline, the first end of the first switching pipeline is connected to the main pipeline connected to the water inlet of the first filter element, and the first switching pipeline The second end of the pipeline is connected to the main pipeline connected to the purified water outlet of the first filter element, and the switching valve includes a first switching valve installed on the first switching pipeline.

Preferably, the switching pipeline includes a second switching pipeline, the first end of the second switching pipeline is connected to the main pipeline connected to the water inlet of the second filter element, and the second switching pipeline The second end of the pipeline is connected to the main pipeline connected to the purified water outlet of the second filter element, and the switching valve includes a second switching valve installed on the second switching pipeline.

Preferably, the switching pipeline includes a first switching pipeline, the first end of the first switching pipeline is connected to the main pipeline connected to the water inlet of the first filter element, and the first switching pipeline The second end of the pipeline is connected to the main pipeline connected to the purified water outlet of the first filter element; the switching pipeline also includes a second switching pipeline, the first end of the second switching pipeline is connected to the The main pipeline of the water inlet of the second filter element is connected, and the second end of the second switching pipeline is connected to the main pipeline connected to the water outlet of the second filter element; the switching valve includes installing a first switching valve on the first switching pipeline, and a second switching valve installed on the second switching pipeline; wherein the second end of the first switching pipeline is connected to the first switching pipeline connected to the main pipeline A position is located downstream of a second position where the first end of the second switch line is connected to the main line, and a third switch is provided on the main line between the first position and the second position valve.

Preferably, the first filter element and the second filter element are respectively provided with a waste water outlet; the waste water outlet of the first filter element is connected with a first waste water outlet pipeline, and a first waste water outlet pipeline is installed on the first waste water outlet pipeline. A flow regulating valve; the waste water outlet of the second filter element is connected with a second waste water outlet pipeline, and a second flow regulating valve is installed on the second waste water outlet pipeline.

Preferably, the second waste water outlet pipeline downstream of the first flow regulating valve and the first waste water outlet pipeline downstream of the second flow regulating valve are integrated into the same pipeline.

Preferably, the water purification system includes a pre-filter located upstream of the first filter.

Preferably, an on-off valve and a booster pump are sequentially arranged along the water flow direction on the main line between the pre-filter element and the first filter element.

Preferably, the water purification system further includes a rear filter element located downstream of the second filter element.

A second aspect of the present invention provides a water purification device, wherein the water purification device includes the above-mentioned water purification system.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

Fig. 1 is the partial structure schematic diagram of the water purification system of the preferred embodiment of the present invention;

2 is a schematic structural diagram of the water purification system according to the first embodiment of the present invention;

3 is a schematic structural diagram of a water purification system according to a second embodiment of the present invention;

4 is a schematic structural diagram of a water purification system according to a third embodiment of the present invention.

Description of reference numerals

1 1st filter element 2 2nd filter element

31 First switching line 32 Second switching line

41 First switching valve 42 Second switching valve

43 Third switching valve 5 Pre-filter

6 On-off valve 7 Booster pump

8 Rear filter element 9 Flow switch

L1 First waste water outlet pipeline L2 Second waste water outlet pipeline

L3 Inlet line L4 Outlet line

F1 First flow control valve F2 Second flow control valve

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

In the present invention, unless otherwise stated, the directional words used such as "up, down, left and right" generally refer to up, down, left and right as shown with reference to the accompanying drawings; "inside, outside" Refers to the inside and outside relative to the contour of each component itself.

One aspect of the present invention provides a water purification system, the water purification system includes a main pipeline, a first filter element 1 and a second filter element 2 connected in series in sequence on the main pipeline, and a switching pipeline is also connected on the main pipeline, The switching pipeline is provided with a switching valve, and the switching pipeline is set to pass the switch of the switching valve so that the water in the main pipeline is filtered through the first filter element 1 and the second filter element 2 in sequence. Switching between the first working mode of the filter and the second working mode of filtering through only one of the first filter element 1 and the second filter element 2 . Wherein, preferably, the first filter element 1 and the second filter element 2 are RO membrane filter elements, and optionally, the second filter element 2 can be a nanofiltration membrane. It can be understood that the first filter element 1 and the second filter element 2 can also be other filter membranes.

In the above technical solution, as shown in FIG. 1 , when the water purification system is in the first working mode of filtering through the first filter element 1 and the second filter element 2 in sequence, the concentrated water (wastewater) in the first filter element 1 and the The ion diffusion between pure water is limited to the inside of the first filter element 1, and will not diffuse into the second filter element 2. Therefore, the problem of high TDS of the first cup of water flowing out from the outlet of the main pipeline can be solved. In the case of ultra-high-purity purification effect or in areas with better water quality (the water in this area is generally filtered through a filter element to meet the purification requirements), wait for the water purification system to run in the first working mode for a set time (for example, 1 minute, The set time can be adjusted according to the data of the water quality test), after switching the pipeline, the water purification system can be switched from the first working mode by switching the valve switch, so that the water entering from the water inlet of the main pipeline only passes through The second working mode in which one of the first filter element 1 and the second filter element 2 performs filtration can not only ensure the water quality at this time, but also will not have a small water output when the first filter element 1 and the second filter element 2 are used in series. In addition, in areas with poor water quality, the first filter element 1 and the second filter element 2 can always be used in series to ensure that the water quality meets the requirements. The water purification system of the present invention can maximize the water output on the premise of ensuring the water quality, and can better meet the needs of users.

Wherein, the water purification system can be switched from the first working mode in which the water in the main pipeline is filtered through the first filter element 1 and the second filter element 2 in sequence to the water in the main pipeline only passing through the first filter element 1 and the second filter element 2. The setting methods of the switching pipeline and switching valve in the second working mode of the filter element 1 or only through one of the second filter elements 2 can be, but are not limited to, the following three:

first embodiment

As shown in FIG. 2 , the switching pipeline includes a first switching pipeline 31 , and the first end of the first switching pipeline 31 is connected to the main pipeline connected to the water inlet of the first filter element 1 , and The second end of the first switching pipeline 31 is connected to the main pipeline connected to the clean water outlet of the first filter element 1 , and the switching valve includes a first switching valve installed on the first switching pipeline 31 . Switch valve 41. In this way, when the first switching valve 41 makes the first switching pipeline 31 disconnected, the water in the main pipeline can be filtered through the first filter element 1 and the second filter element 2 in sequence, and the water purification system is in the first operation. When the first switching valve 41 connects the first switching pipeline 31, the water in the main pipeline can only be filtered through the second filter element 2, and the water purification system is in the second working mode.

Second Embodiment

As shown in FIG. 3 , the switching pipeline includes a second switching pipeline 32 , and the first end of the second switching pipeline 32 is connected to the main pipeline connected to the water inlet of the second filter element 2 , and The second end of the second switching pipeline 32 is connected to the main pipeline connected to the purified water outlet of the second filter element 2 , and the switching valve includes a second switching valve installed on the second switching pipeline 32 . Switch valve 42. In this way, when the second switching valve 42 makes the second switching pipeline 32 disconnected, the water in the main pipeline can be filtered through the first filter element 1 and the second filter element 2 in sequence, and the water purification system is in the first operation. When the second switching valve 42 connects the second switching pipeline 32, the water in the main pipeline can only be filtered through the first filter element 1, and the water purification system is in the second working mode.

third embodiment

As shown in FIG. 4 , the switching pipeline includes a first switching pipeline 31 , and the first end of the first switching pipeline 31 is connected to the main pipeline connected to the water inlet of the first filter element 1 , and The second end of the first switching pipeline 31 is connected to the main pipeline connected to the clean water outlet of the first filter element 1; the switching pipeline also includes a second switching pipeline 32, the second switching pipeline The first end of the pipeline 32 is connected to the main pipeline connected to the water inlet of the second filter element 2 , and the second end of the second switching pipeline 32 is connected to the purified water outlet of the second filter element 2 . The main pipeline is connected; the switching valve includes a first switching valve 31 installed on the first switching pipeline 31 and a second switching valve 42 installed on the second switching pipeline 32; wherein, The first position where the second end of the first switching pipeline 31 is connected to the main pipeline is located downstream of the second location where the first end of the second switching pipeline 32 is connected to the main pipeline, and the A third switching valve 43 is provided on the main line between the first position and the second position. In this way, when the first switching valve 41 makes the first switching pipeline 31 disconnected, the second switching valve 42 makes the second switching pipeline 32 disconnected, and the third switching valve 43 is located between the first filter element 1 and the second filter element 2 When the main pipeline is connected, the water in the main pipeline can be filtered through the first filter element 1 and the second filter element 2 in sequence, and the water purification system is in the first working mode; When the switching pipeline 31 is connected, the second switching valve 42 makes the second switching pipeline 32 communicate, and the third switching valve 43 makes the main pipeline between the first filter element 1 and the second filter element 2 disconnected, the first filter element 1 and the second filter element 2 are not connected. The second filter element 2 can be used in parallel, so that a part of the water in the main pipeline can only be filtered through the first filter element 1 and another part of the water in the main pipeline can be filtered only through the second filter element 2, and the water purification system is in the second working mode .

In the above three embodiments, when the water purification system is in the first working mode in which the water in the main pipeline passes through the first filter element 1 and the second filter element 2 in sequence, that is, the first filter element 1 and the second filter element 2 The filter elements 2 are used in series, so that the purification effect is better, the degree of water purification can be effectively improved, and the problem of the high TDS of the first cup of water is solved; when the water system is in the main pipeline, the water only passes through the first filter element 1 and all other elements. When one of the second filter elements 2 is in the second working mode of filtering, that is, only the first filter element 1 or only the second filter element 2 is used, or the first filter element and the second filter element 2 are used in parallel, the purification of pure water can be accelerated. The water flow rate can meet the needs of users with large water demand.

As shown in Figures 1-4, in order to discharge the concentrated water in the first filter element 1 and the second filter element 2 in time, preferably, the first filter element 1 and the second filter element 2 are also provided with waste water outlets respectively; The waste water outlet of the first filter element 1 is connected with a first waste water outlet pipe L1, and a first flow regulating valve F1 is installed on the first waste water outlet pipe L1; the waste water outlet of the second filter element 2 is connected with a first waste water outlet pipe. Second waste water outlet pipeline L2, a second flow regulating valve F2 is installed on the second waste water outlet pipeline L2. In addition, when the first filter element 1 and the second filter element 2 are used in series, since the recovery rate of the second filter element 2 (that is, the ratio of the pure water to the inflow water) is greater than the recovery rate of the first filter element 1, that is to say, the second filter element 2 The amount of concentrated water produced is small, in order to keep the pure effluent flow of the main pipeline from being too small, the opening of the second flow control valve F2 can be adjusted appropriately; In use, in order to keep the first filter element 1 and the second filter element in balance during the filtering process, the first flow regulating valve F1 and the second flow regulating valve F2 can be adjusted to the same opening degree.

In addition, in order to ensure that the first flow regulating valve F1 can independently control the communication and non-communication of the first waste water outlet pipeline L1, and the second flow regulating valve F2 can independently control the communication and non-communication of the second waste water outlet pipeline L2, at the same time, Minimize the amount of pipelines to simplify the structure and reduce costs. Preferably, the second waste water outlet pipeline L2 is downstream of the first flow regulating valve F1 and the first waste water outlet pipeline L1 is in the first waste water outlet pipeline L1. The downstream of the second flow regulating valve F2 is integrated into the same pipeline.

As shown in Figure 2, Figure 3 and Figure 4, in order to remove large particles of impurities in water and prevent them from entering downstream components (such as switching valves and on-off valves to be described below), affecting the normal operation of these components, preferably, all The water purification system includes a pre-filter element 5 located upstream of the first filter element 1, the water inlet of the pre-filter element 5 is used to connect the water inlet pipeline L3, and the water outlet of the pre-filter element 5 communicates with the water inlet pipe through the main pipe 1. The water inlet of the first filter element 2 is connected. Among them, the pre-filter 5 can be PP cotton, activated carbon, or the like.

Further preferably, an on-off valve 6 and a booster pump 7 are sequentially arranged along the water flow direction on the main road between the pre-filter element 5 and the first filter element 1 . Among them, the booster pump 7 can be used to speed up the flow rate of the water in the main pipeline, and the on-off valve 6 can ensure that the components located downstream thereof (such as the booster pump) no longer bear the water pressure after being closed.

In addition, the first switching valve 41 , the second switching valve 42 , the third switching valve 43 and the switching valve may be normally closed solenoid valves.

In order to further improve water quality, preferably, the water purification system further includes a rear filter element 8 located downstream of the second filter element 2 . The water inlet of the rear filter element 8 can be connected to the water purification outlet of the second filter element 2 through the main pipeline, and the water outlet of the rear filter element 8 is used to connect the water outlet pipeline L4. Wherein, the rear filter element 8 can be activated carbon. Moreover, in order to conveniently control the water output, the water outlet pipeline L4 is provided with a flow switch 9 , and a water tap can be connected to the water outlet pipeline L4 downstream of the flow switch 9 . Wherein, the flow switch can be a high pressure switch.

A second aspect of the present invention provides a water purification device, wherein the water purification device includes the above-mentioned water purification system. Since the water purification equipment includes the above-mentioned water purification system, it has all or at least part of the technical effects of the above-mentioned water purification system, and the details and effects of the more specific technical solutions can be referred to above.

The preferred embodiments of the present invention have been described above in detail with reference to the accompanying drawings, however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed in the present invention, and all belong to the protection scope of the present invention.

Claims (10)

1. The utility model provides a water purification system, its characterized in that, water purification system includes the main line, first filter core (1) and second filter core (2) of series connection have connected gradually on the main line, still be connected with the switching pipeline on the main line, be provided with the switching valve on the switching pipeline, the switching pipeline sets up to pass through the switch of switching valve makes water in the main line is in process in proper order first filter core (1) with second filter core (2) carry out filterable first mode and only pass through switch between first filter core (1) and one of second filter core (2) carries out filterable second mode.

2. Water purification system according to claim 1, wherein the switching line comprises a first switching line (31), a first end of the first switching line (31) being connected to the main line connecting the water inlet of the first filter cartridge (1) and a second end of the first switching line (31)) being connected to the main line connecting the purified water outlet of the first filter cartridge (1), the switching valve comprising a first switching valve (41) mounted on the first switching line (31).

3. The water purification system according to claim 1, wherein the switching line comprises a second switching line (32), a first end of the second switching line (32) being connected with the main line connecting the water inlet of the second filter cartridge (2) and a second end of the second switching line (32) being connected with the main line connecting the purified water outlet of the second filter cartridge (2), the switching valve comprising a second switching valve (42) mounted on the second switching line (32).

4. The water purification system according to claim 1, wherein the switching line comprises a first switching line (31), a first end of the first switching line (31) being connected to the main line connecting the water inlet of the first filter cartridge (1) and a second end of the first switching line (31)) being connected to the main line connecting the purified water outlet of the first filter cartridge (1);

the switching pipeline further comprises a second switching pipeline (32), a first end of the second switching pipeline (32) is connected with the main pipeline connected with the water inlet of the second filter element (2), and a second end of the second switching pipeline (32) is connected with the main pipeline connected with the purified water outlet of the second filter element (2);

the switching valves comprise a first switching valve (31) arranged on the first switching pipeline (31) and a second switching valve (42) arranged on the second switching pipeline (32); wherein a first position at which a second end of the first switching conduit (31) is connected to the main conduit is located downstream of a second position at which a first end of the second switching conduit (32) is connected to the main conduit, and a third switching valve (43) is provided on the main conduit between the first and second positions.

5. Water purification system according to any one of claims 1-4, wherein the first filter cartridge (1) and the second filter cartridge (2) are further provided with a waste water outlet, respectively;

a waste water outlet of the first filter element (1) is connected with a first waste water outlet pipeline (L1), and a first flow regulating valve (F1) is installed on the first waste water outlet pipeline (L1);

the waste water outlet of the second filter element (2) is connected with a second waste water outlet pipeline (L2), and a second flow regulating valve (F2) is installed on the second waste water outlet pipeline (L2).

6. The water purification system of claim 5, wherein the second waste water outlet line (L2) is merged into the same line downstream of the first flow regulating valve (F1) as the first waste water outlet line (L1) is downstream of the second flow regulating valve (F2).

7. Water purification system according to any one of claims 1-4, comprising a pre-filter cartridge (5) upstream of the first filter cartridge (1).

8. Water purification system according to claim 7, wherein a switching valve (6) and a booster pump (7) are arranged in sequence on the main pipe between the pre-filter element (5) and the first filter element (1) in the flow direction of the water.

9. Water purification system according to any one of claims 1-4, further comprising a post-filter cartridge (8) downstream of the second filter cartridge (2).

10. A water purification apparatus, characterized in that it comprises a water purification system according to any one of claims 1-9.

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