Multi-channel control valve and water purification system

Abstract

The utility model relates to the technical field of water purification, and discloses a multi-channel control valve and a water purification system. The multi-channel control valve comprises a first valve plate which is a three-channel control valve; the second valve plate is a three-channel control valve; the first valve plate and the second valve plate can be attached in a relatively rotating mode, so that channels communicated between the first valve plate and the second valve plate can be switched. When the first valve plate and the second valve plate rotate relatively, a communicated channel between the first valve plate and the second valve plate can be switched, so that the pipeline switching of the water purification system provided with the reverse osmosis filter element can be realized, the parallel connection of at least two reverse osmosis filter elements can be changed into series connection, and the treatment capacity of the water purification system on raw water is improved; the obvious deterioration of the raw water quality can be dealt with, and the water use safety of a user is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and particularly to a multi-channel control valve and a water purification system. Background Art

[0002] Reverse osmosis water purifiers have been favored by consumers because they can effectively remove various pollutants in tap water. However, when water pollution incidents occur, such as salt tides, heavy rains, and chemical leakage pollution, the quality of the raw water will deteriorate significantly. At this time, the coping ability of conventional reverse osmosis water purifiers becomes poor, and the safety of users' water use cannot be guaranteed. Summary of the Invention

[0003] In view of this, the present invention provides a multi-channel control valve and a water purification system to solve the problem that the reverse osmosis water purifier has insufficient ability to cope with the significant deterioration of the raw water quality and cannot guarantee the safety of users' water use.

[0004] In the first aspect, the present invention provides a multi-channel control valve, including:

[0005] A first valve plate, which is a three-channel control valve;

[0006] A second valve plate, which is a three-channel control valve; the first valve plate and the second valve plate are fitted together so as to be relatively rotatable, and the channels communicating between the two can be switched.

[0007] Beneficial Effects: When the first valve plate and the second valve plate rotate relative to each other, the channels communicating between the two can be switched, thereby enabling the switching of the pipeline of the water purification system installed therewith, and further enabling at least two reverse osmosis filters to be changed from parallel connection to series connection, thereby improving the processing ability of the water purification system for the raw water, being able to cope with the significant deterioration of the raw water quality, and ensuring the safety of users' water use.

[0008] In an optional embodiment, the first valve plate includes an A channel, a C channel, an E channel, and a first idle channel, and the second valve plate includes a B channel, a D channel, an F channel, and a second idle channel; the first valve plate and the second valve plate have a first communication state and a second communication state. In the first communication state, the A channel communicates with the B channel, the C channel communicates with the D channel, and the E channel communicates with the F channel; in the second communication state, the A channel communicates with the D channel, the B channel communicates with the E channel, the C channel communicates with the second idle channel, and the F channel communicates with the first idle channel.

[0009] Beneficial effects: In the first connection state, the A channel is connected to the B channel, the C channel is connected to the D channel, and the E channel is connected to the F channel. The first reverse osmosis filter element and the second reverse osmosis filter element in the water purification system are in an associated connection state, and the two reverse osmosis filter elements respectively purify the water quality. In the second connection state, the A channel is connected to the D channel, the B channel is connected to the E channel, the C channel is connected to the second idle channel, and the F channel is connected to the first idle channel. The first reverse osmosis filter element and the second reverse osmosis filter element in the water purification system are in a series connection state. The water passing through the first reverse osmosis filter element is further purified by passing through the second reverse osmosis filter element. Even in the case of extremely deteriorated raw water quality, the raw water is purified through multiple filtrations to meet the drinking water quality requirements, thereby improving the ability of the purification system to cope with the obvious deterioration of the raw water quality, ensuring the purified water quality, improving the safety of drinking water, and enhancing the reliability of the water purification system.

[0010] In an optional embodiment, the first valve plate is a movable valve, and the second valve plate is a fixed valve; or, the first valve plate is a fixed valve, and the second valve plate is a movable valve.

[0011] Beneficial effects: One of the first valve plate and the second valve plate is a movable valve, and the other is a fixed valve. One of the two closely attached valve plates rotates relative to the other to achieve the change of the connected channels. The structure is simple, the channel switching efficiency is high, and the switching reliability is high.

[0012] In an optional embodiment, the first valve plate is a movable valve, and the first valve plate is drivingly connected to a valve plate driving member; or, the second valve plate is a movable valve, and the second valve plate is drivingly connected to a valve plate driving member.

[0013] Beneficial effects: The movable valve rotates driven by the driving member drivingly connected thereto, which is more convenient compared with the manual adjustment method and is also convenient for intelligent control.

[0014] In a second aspect, the present invention also provides a water purification system having a raw water inlet, a purified water outlet, and a wastewater outlet. The water purification system includes:

[0015] A pumping device;

[0016] A first reverse osmosis filter element;

[0017] A second reverse osmosis filter element;

[0018] The multi-channel control valve according to any one of the above, the multi-channel control valve is connected to the first reverse osmosis filter element and the second reverse osmosis filter element through pipelines, and can control the first reverse osmosis filter element and the second reverse osmosis filter element to switch between a parallel state and a series state.

[0019] Beneficial effects: The water purification system includes the multi-channel control valve of the present invention. The multi-channel control valve can control the switching between the parallel state and the series state of the first reverse osmosis filter element and the second reverse osmosis filter element. Under normal conditions, the first reverse osmosis filter element and the second reverse osmosis filter element work in parallel. When the water quality deteriorates significantly, the connection state of the first reverse osmosis filter element and the second reverse osmosis filter element is switched to the series state through the multi-channel control valve, thereby increasing the water purification capacity of the water purification system, enabling the purified water to still meet the drinking water quality requirements, improving the ability of the purification system to cope with changes in the raw water quality, ensuring the safety of the purified water quality, and enhancing the reliability of the water purification system.

[0020] In an alternative embodiment, the water purification system further includes a waste water valve assembly, and the waste water valve assembly is disposed in a waste water discharge pipeline communicated with the waste water outlet.

[0021] Beneficial effects: By setting the waste water valve assembly, the waste water discharge pipeline can be communicated with the waste water outlet when waste water needs to be discharged, which is convenient for operation.

[0022] In an alternative embodiment, the waste water valve assembly includes:

[0023] A first waste water valve, disposed between the first reverse osmosis filter element and the waste water outlet;

[0024] A second waste water valve, disposed between the second reverse osmosis filter element and the waste water outlet.

[0025] Beneficial effects: A waste water valve is provided corresponding to each reverse osmosis filter element, enabling individual control and higher flexibility.

[0026] In an alternative embodiment, the pumping device includes:

[0027] A first water pump, disposed between the raw water inlet and the first reverse osmosis filter element;

[0028] A second water pump, disposed between the raw water inlet and the second reverse osmosis filter element.

[0029] Beneficial effects: The pumping device for providing the water circulation power of the water purification system includes a first water pump for providing pumping power for the pipeline where the first reverse osmosis filter element is located and a second water pump for providing pumping power for the pipeline where the second reverse osmosis filter element is located, which facilitates the independent water purification of the first reverse osmosis filter element and the second reverse osmosis filter element in the parallel state.

[0030] In an alternative embodiment, the water purification system further includes:

[0031] A control unit;

[0032] A water quality detection unit, disposed at the raw water inlet;

[0033] A valve disc driving member for driving the rotation of the first valve disc or the second valve disc; the water quality detection unit, the valve disc driving member and the pumping device are respectively connected to the control unit.

[0034] Advantageous effects: A water quality detection unit is provided to monitor the quality of raw water and feedback it to the control unit, facilitating the adjustment of the connection state of the first reverse osmosis filter element and the second reverse osmosis filter element according to the change of water quality. When the water quality is normal, the two reverse osmosis filter elements are arranged in parallel. In case of special situations such as the pollution of raw water and the deterioration of water quality, the control unit can also timely control the multi-channel control valve to switch the connecting pipeline, and change the first reverse osmosis filter element and the second reverse osmosis filter element into a series state, thereby improving the response ability of the water purification system to water quality changes, enhancing the reliability of the water purification system, and ensuring the safety of the drinking water of users.

[0035] In an optional embodiment, the valve disc driving member is a motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the related art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 It is a schematic diagram of the channels of the first valve disc of a multi-channel control valve according to an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the channels of the second valve disc of a multi-channel control valve according to an embodiment of the present invention;

[0039] Figure 3 It is a schematic diagram of the channels after the first valve disc rotates by a certain angle according to an embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of a water purification system according to an embodiment of the present invention, showing the associated state of two reverse osmosis filter elements in the figure;

[0041] Figure 5 For Figure 4 It is a schematic diagram of the water purification path of the water purification system in the figure;

[0042] Figure 6 It is a schematic diagram of the structure of a water purification system according to an embodiment of the present invention, showing the series state of two reverse osmosis filter elements in the figure;

[0043] Figure 7 ForFigure 6 Schematic diagram of the water purification path of the water purification system

[0044] Figure 8 The first control flow chart of the water purification control method of the water purification system of the present invention

[0045] Figure 9 The second control flow chart of the water purification control method of the water purification system of the present invention

[0046] Description of reference numerals

[0047] 10. First valve plate

[0048] 20. Second valve plate

[0049] 1. First reverse osmosis filter element

[0050] 2. Second reverse osmosis filter element

[0051] 3. First waste water valve

[0052] 4. Second waste water valve

[0053] 5. First water pump

[0054] 6. Second water pump

[0055] 7. Raw water inlet

[0056] 8. Purified water outlet

[0057] 9. Waste water outlet Detailed implementation manners

[0058] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0059] In the description of the invention, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0060] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The following Figures 1 to 9 , describes the embodiments of the present invention.

[0062] According to an embodiment of the present invention, on the one hand, a multi-channel control valve is provided, including:

[0063] The first valve plate 10, which is a three-channel control valve, see Figure 1 ;

[0064] The second valve plate 20, which is a three-channel control valve, see Figure 2 ; The first valve plate 10 and the second valve plate 20 are disposed in a relatively rotatable and fitting manner, so that the channels communicating between the two can be switched.

[0065] When the first valve plate 10 and the second valve plate 20 rotate relative to each other, the channels communicating between the two can be switched, and thus the pipeline switching of the water purification system installed thereon can be realized, so that at least two reverse osmosis filters can be changed from parallel connection to series connection, thereby improving the treatment ability of the water purification system for raw water, being able to cope with the obvious deterioration of the raw water quality, and ensuring the water use safety of users.

[0066] The way to adjust the state of the multi-channel control valve can be to drive the first valve plate 10 to rotate a certain angle through a stepper motor, or manually rotate the first valve plate 10 by a certain angle, from Figure 1 state transformation to Figure 3 the state shown.

[0067] In some embodiments, the first valve plate 10 includes an A channel, a C channel, an E channel, and a first idle channel, and the second valve plate 20 includes a B channel, a D channel, an F channel, and a second idle channel; the first valve plate 10 and the second valve plate 20 have a first communication state and a second communication state. In the first communication state, the A channel communicates with the B channel, the C channel communicates with the D channel, and the E channel communicates with the F channel; in the second communication state, for example, the A channel communicates with the D channel, the B channel communicates with the E channel, the C channel communicates with the second idle channel, and the F channel communicates with the first idle channel.

[0068] As Figure 4 and Figure 5 shown, in the first communication state, the A channel communicates with the B channel, the C channel communicates with the D channel, and the E channel communicates with the F channel. The first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 in the water purification system are in an associated connection state, and the two reverse osmosis filter elements purify the water quality respectively; and as Figure 6 and Figure 7 shown, in the second communication state, the A channel communicates with the D channel, the B channel communicates with the E channel, the C channel communicates with the second idle channel, and the F channel communicates with the first idle channel. The first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 in the water purification system are in a series connection state. The water passing through the first reverse osmosis filter element 1 is further purified by passing through the second reverse osmosis filter element 2. Even in the case of extremely deteriorated raw water quality, the raw water is purified through multiple filtrations to meet the drinking water quality requirements, thereby improving the ability of the purification system to cope with the obvious deterioration of the raw water quality, ensuring the purified water quality, improving the safety of the drinking water, and enhancing the reliability of the water purification system.

[0069] In some embodiments, the first valve plate 10 is a movable valve, and the second valve plate 20 is a fixed valve; alternatively, the first valve plate 10 is a fixed valve, and the second valve plate 20 is a movable valve.

[0070] One of the first valve plate 10 and the second valve plate 20 is a movable valve, and the other is a fixed valve. One of the two closely attached valve plates rotates relative to the other to achieve the change of the communication channels. The structure is simple, the channel switching efficiency is high, and the switching reliability is high.

[0071] In some embodiments, the first valve plate 10 is a movable valve, and the first valve plate 10 is drivingly connected to a valve plate driving member; alternatively, the second valve plate 20 is a movable valve, and the second valve plate 20 is drivingly connected to a valve plate driving member.

[0072] The movable valve rotates driven by the driving member drivingly connected thereto, which is more convenient compared with the manual adjustment method and is also convenient for intelligent control. The valve plate driving member is a motor, and using a motor for driving is convenient for control.

[0073] In a second aspect, the present invention further provides a water purification system, which has a raw water inlet 7, a purified water outlet 8 and a waste water outlet 9. The water purification system includes:

[0074] A pumping device;

[0075] A first reverse osmosis filter element 1;

[0076] A second reverse osmosis filter element 2;

[0077] At least one multi-channel control valve, which is connected to the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 through pipelines, and can control the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 to switch between a parallel state and a series state.

[0078] The water purification system includes the multi-channel control valve of the present invention. The multi-channel control valve can control the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 to switch between a parallel state and a series state. Under normal conditions, the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 work in parallel. When the water quality deteriorates significantly, the connection state of the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 is switched to a series state through the multi-channel control valve, thereby increasing the water purification capacity of the water purification system, enabling the purified water to still meet the drinking water quality requirements, improving the ability of the purification system to cope with changes in raw water quality, ensuring the safety of the purified water quality, and enhancing the reliability of the water purification system.

[0079] In some embodiments, the water purification system further includes a waste water valve assembly, which is arranged in the waste water discharge pipeline communicated with the waste water outlet 9.

[0080] By setting the waste water valve assembly, the waste water discharge pipeline can be communicated with the waste water outlet 9 when waste water needs to be discharged, which is convenient for operation.

[0081] In some embodiments, the waste water valve assembly includes:

[0082] A first waste water valve 3, which is arranged between the first reverse osmosis filter element 1 and the waste water outlet 9;

[0083] A second waste water valve 4, which is arranged between the second reverse osmosis filter element 2 and the waste water outlet 9.

[0084] A waste water valve is correspondingly arranged for each reverse osmosis filter element, which can realize independent control and has higher flexibility.

[0085] In an optional implementation manner, the pumping device includes:

[0086] A first water pump 5, which is arranged between the raw water inlet 7 and the first reverse osmosis filter element 1;

[0087] A second water pump 6, which is arranged between the raw water inlet 7 and the second reverse osmosis filter element 2.

[0088] The pumping device for providing the water circulation power of the water purification system includes a first water pump 5 that provides pumping power for the pipeline where the first reverse osmosis filter element 1 is located and a second water pump 6 that provides pumping power for the pipeline where the second reverse osmosis filter element 2 is located, which facilitates the independent water purification of the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 in a parallel state. Moreover, by using two water pumps, compared with using a large water pump, the noise of the water purification system can be reduced, and the user experience can be improved.

[0089] In some embodiments, the water purification system further includes:

[0090] A control unit;

[0091] A water quality detection unit, which is arranged at the raw water inlet 7;

[0092] A valve piece driving member for driving the first valve piece 10 or the second valve piece 20 to rotate; the water quality detection unit, the valve piece driving member and the pumping device are respectively connected to the control unit.

[0093] The water quality detection unit is provided to monitor the raw water quality and feedback it to the control unit, which facilitates adjusting the connection state of the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 according to the water quality change. When the water quality is normal, the two reverse osmosis filter elements are arranged in parallel. In case of special situations such as the raw water being polluted and the water quality deteriorating, the control unit can also timely control the multi-channel control valve to switch the connected pipelines, and change the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 into a series state, so as to enhance the response ability of the water purification system to water quality changes, improve the reliability of the water purification system, and ensure the safety of the user's drinking water.

[0094] Specifically, the water quality detection unit includes a water quality detector. The water quality detector can adopt the water quality detector in related technologies. The main contents detected by the water quality detector include:

[0095] Physical and chemical indexes: including chromaticity, turbidity, odor and taste, visible substances to the naked eye, pH value, aluminum, arsenic, mercury, lead, cadmium, chromium, chloride, sulfate, cyanide, fluoride, nitrate, etc. These indexes reflect the physical and chemical properties of water, such as the hardness and acidity of water, as well as the harmful substances that may exist in water.

[0096] Microbial indexes: including total colony count, total coliform group, etc. These indexes are used to ensure the hygienic safety of drinking water. Through detection, bacteria, viruses and other microorganisms in the water source can be found in time, preventing the harm to human health caused by water pollution.

[0097] Toxicological evaluation: Detect and analyze the harmful substances that may exist in drinking water, such as heavy metals, organic substances, etc., to evaluate their harmful degree to human health.

[0098] Organic matter detection: Detect and analyze the possible organic matter in drinking water to evaluate its potential harm to human health, including pesticide residues and industrial wastewater, etc.

[0099] In addition to the above aspects, the water quality detector also includes items such as trace element detection and radioactive substance detection.

[0100] In the third aspect, as Figure 8 shown, the present invention also provides a water purification control method, which is applicable to the above-mentioned water purification system. The water purification control method includes the following steps:

[0101] Obtain the water quality index of the raw water and compare it with the preset water quality index;

[0102] Judge whether the water quality exceeds the standard;

[0103] If the water quality exceeds the standard, control the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 to switch from the parallel state to the series state.

[0104] The preset water quality index is the limit water quality index corresponding to the limit treatment capacity of the water purification system when the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 are in parallel. At this time, the pure water quality at the water purification outlet 8 just meets the drinking water standard. That is to say, if the raw water quality index exceeds this preset water quality index, the parallel setting of the two reverse osmosis filter elements will not be able to meet the water purification treatment requirements. By obtaining the water quality index of the raw water and comparing it with the preset water quality index, it is judged whether the water quality exceeds the standard. If it exceeds the standard, it is necessary to switch the connection state of the two reverse osmosis filter elements to the series state to improve the treatment capacity of the water purification system.

[0105] In some embodiments, as Figure 9 shown, the water purification control method includes the following steps:

[0106] Obtain the water quality index of the raw water and compare it with the preset water quality index;

[0107] Judge whether the water quality exceeds the standard;

[0108] If the water quality exceeds the standard, control the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 to switch from the parallel state to the series state;

[0109] If the water quality returns to the standard, control the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 to switch from the series state to the associated state.

[0110] When the raw water quality recovers and it is judged that the preset water quality is met, the multi-channel inlet valve can be controlled to return to its original state, and the first reverse osmosis filter element 1 and the second reverse osmosis filter element 2 are switched back from the series state to the original associated state.

[0111] As Figures 4 to 7As shown in the figure, the specific embodiment of the present invention provides a water purification system. The multi-channel control valve of the water purification system includes a first valve plate 10 and a second valve plate 20. The three channels of the first valve plate 10 and the three channels of the second valve plate 20 can adjust the conducting channels by adjusting the angles of the valve plates. The first valve plate 10 and the second valve plate 20 achieve the sealing of different channels through a tightly fitting manner.

[0112] The first valve plate 10 and the second valve plate 20 are preferably made of ceramic materials.

[0113] After the first valve plate 10 and the second valve plate 20 are tightly fitted, they are fixed by wrapping with plastic parts externally.

[0114] The three channels of the second valve plate 20 and the second valve plate 20 can be connected to the waterway interfaces in the water purification system. The first valve plate 10 has three channels A, C, and E, and the second valve plate 20 has three channels B, D, and F. In the water purification system. Channel A is connected to the pipeline interface between the raw water inlet and the first water pump 5, channel B is connected to the inlet of the second water pump 6, channel C is connected to the pipeline interface between the first wastewater valve 3 and the wastewater outlet 9, channel D is connected to the wastewater outlet 9 of the second RO filter element, channel E is connected to the pure water outlet of the first RO filter element, and channel F is connected to the interface on the pure water pipeline of the second RO filter element.

[0115] Under normal conventional municipal tap water conditions, when the multi-channel control valve is in the first state, channel A is in communication with channel B, channel C is in communication with channel D, and channel E is in communication with channel F. The two RO filter elements are in parallel, the water quality of the outlet meets the requirements, and the water output flow is also large.

[0116] When the water source water quality deteriorates, the multi-channel control valve is adjusted to the second state. Channel A is in communication with channel D, channel E is in communication with channel B, channels C and F are independent. The two RO filter elements are in series, so that the water produced by the first RO filter element enters the second RO filter element for secondary filtration to ensure the safety of the outlet water quality.

[0117] The way to adjust the state of the multi-channel control valve is to drive the first valve plate 10 to rotate a certain angle by a stepper motor, or manually rotate the first valve plate 10 by a certain angle.

[0118] The present invention adjusts the operation mode of the water purification system by the conducting state of the multi-channel control valve to improve the influence of the water purification system caused by the change of the raw water quality and ensure the safety of the outlet water quality for users.

[0119] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A multi-channel control valve, characterized in that, Comprising: A first valve plate (10), which is a three-channel control valve; A second valve plate (20), which is a three-channel control valve; the first valve plate (10) and the second valve plate (20) are arranged in a relatively rotatable and fitting manner, so that the channels communicating between the two can be switched.

2. The multi-channel control valve according to claim 1, characterized in that The first valve plate (10) includes an A channel, a C channel, an E channel and a first idle channel, and the second valve plate (20) includes a B channel, a D channel, an F channel and a second idle channel; the first valve plate (10) and the second valve plate (20) have a first communication state and a second communication state. In the first communication state, the A channel communicates with the B channel, the C channel communicates with the D channel, and the E channel communicates with the F channel; in the second communication state, the A channel communicates with the D channel, the B channel communicates with the E channel, the C channel communicates with the second idle channel, and the F channel communicates with the first idle channel.

3. The multi-channel control valve according to claim 1 or 2, characterized in that, The first valve plate (10) is a movable valve, and the second valve plate (20) is a fixed valve; alternatively, the first valve plate (10) is a fixed valve, and the second valve plate (20) is a movable valve.

4. The multi-channel control valve according to claim 3, characterized in that, The first valve plate (10) is a movable valve, and the first valve plate (10) is drivingly connected to a valve plate driving member; alternatively, the second valve plate (20) is a movable valve, and the second valve plate (20) is drivingly connected to a valve plate driving member.

5. A water purification system having a raw water inlet (7), a purified water outlet (8) and a wastewater outlet (9), characterized in that, The water purification system includes: A pumping device; A first reverse osmosis filter element (1); A second reverse osmosis filter element (2); The multi-channel control valve according to any one of claims 1 to 4, the multi-channel control valve is connected to the first reverse osmosis filter element (1) and the second reverse osmosis filter element (2) through pipelines, and can control the first reverse osmosis filter element (1) and the second reverse osmosis filter element (2) to switch between a parallel state and a series state.

6. The water purification system according to claim 5, wherein The water purification system further includes a waste water valve assembly, and the waste water valve assembly is arranged in a waste water discharge pipeline communicating with the waste water outlet (9).

7. The water purification system according to claim 6, characterized in that, The waste water valve assembly includes: A first waste water valve (3), which is arranged between the first reverse osmosis filter element (1) and the waste water outlet (9); A second waste water valve (4), which is arranged between the second reverse osmosis filter element (2) and the waste water outlet (9).

8. The water purification system according to claim 5, characterized in that, The pumping device includes: A first water pump (5), which is arranged between the raw water inlet (7) and the first reverse osmosis filter element (1); A second water pump (6), which is arranged between the raw water inlet (7) and the second reverse osmosis filter element (2).

9. The water purification system according to any one of claims 5 to 8, characterized in that The water purification system further includes: A control unit; A water quality detection unit, which is arranged at the raw water inlet (7); A valve plate driving member, which is used to drive the first valve plate (10) or the second valve plate (20) to rotate; the water quality detection unit, the valve plate driving member and the pumping device are respectively connected to the control unit.

10. The water purification system according to claim 9, wherein The valve plate driving member is a motor.

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