CN110902869A

CN110902869A - Water treatment system, water treatment method and plane valve thereof

Info

Publication number: CN110902869A
Application number: CN201811089239.5A
Authority: CN
Inventors: 胡霄宗
Original assignee: Ningbo Coman Environmental Protection Technology Co Ltd
Current assignee: Ningbo Coman Environmental Protection Technology Co Ltd
Priority date: 2018-09-18
Filing date: 2018-09-18
Publication date: 2020-03-24
Anticipated expiration: 2038-09-18
Also published as: CN110902869B

Abstract

The invention provides a water treatment system, wherein the water treatment system can control a first water treatment device and a second water treatment device to treat water through a single control valve, and further perform secondary treatment on the water after primary treatment, so that the complexity of the water treatment system is obviously reduced compared with the traditional multi-stage water treatment system, in particular to a purification-softening water treatment system.

Description

Water treatment system, water treatment method and plane valve thereof

Technical Field

The invention relates to the technical field of water treatment, in particular to a water treatment system which can carry out multi-stage treatment on water, such as secondary purification or softening treatment on purified water so as to obtain cleaner purified water and/or softened water. Further, the water treatment system can realize multi-stage treatment of raw water (or water to be treated) by controlling a single control valve, such as a fluid valve. Preferably, the control valve of the water treatment system of the present invention is a flat valve.

Technical Field

With the increasing health concerns and concerns about water pollution, water treatment machines or systems have become common household appliances. Water treatment machines, especially household water treatment machines, such as central water purifiers, water softeners and the like are often installed in kitchens to treat water and obtain cleaner water.

In order to obtain sufficiently clean water, such as water more suitable for direct drinking, the existing water treatment system often has more than one filter element, for example, many households may install a prefilter for filtering larger impurities at the upstream of the ultrafiltration water purifier, or install an activated carbon filter element at the downstream of the ultrafiltration water purifier, so as to improve the taste of the purified water. For another example, a pre-filter is installed upstream of a water softener that softens water to remove larger impurities. However, in the existing water treatment machines or water treatment systems having a composite water treatment function or multi-stage water treatment functions, such as an activated carbon-ultrafiltration filtration composite water purification system, an ultrafiltration-RO membrane composite water purification system, a PP cotton-activated carbon composite water purification system, etc., a plurality of control valves are required to realize flow control and water treatment control of water flow. The main reason is that in water treatment systems with multiple water treatment functions, the water treatment machine mostly needs to provide not only the water treatment function but also other functions, such as backwashing of the filter element, especially the pre-filter, after a period of use. However, these additional but important functions of a water treatment system involve the control of water flow and the creation of complex water paths. In order to realize the control of the complex water path, most of the existing water treatment machines with multi-stage water treatment functions have to be provided with two or more control valves, which finally results in the complex structure, the large volume and the poor use experience of the whole water treatment system. Furthermore, water treatment machines, especially domestic water treatment machines, are typically mounted under the counter of a kitchen, such as under a hand sink. The existing water treatment machine with the multi-stage water treatment function has huge volume, occupies too much space and brings great inconvenience to the installation and the use of a user. In particular, when the water treatment system is out of order for maintenance and the filter element needs to be replaced, the difficulty of operating the water treatment machine by a user is increased.

Disclosure of Invention

The main advantage of the present invention is that it provides a water treatment system having at least two water treatment devices, and the water treatment system can control the water treatment devices through a single control valve to achieve treatment of raw water or water to be treated.

Another advantage of the present invention is that it provides a water treatment system, wherein at least one of the water treatment devices of the water treatment system is a (water) purification device and another water treatment device is a (water) softening device to separately and/or simultaneously perform purification and softening treatment of raw water or water to be treated, thereby separately and/or simultaneously providing purified water and softened water to a user according to the user's needs. Optionally, both water treatment devices of the water treatment system are purification devices or are softening devices.

Another advantage of the present invention is that it provides a water treatment system wherein two water treatment devices of the water treatment system form a primary water treatment device (or first water treatment device) and a secondary water treatment device (or second water treatment device), the primary water treatment device of the water treatment system can be any water treatment device, the filter element of which can be any water treatment filter element, such as an ultrafiltration filter element, an activated carbon filter element, a screen filter, a laminated filter, a softening filter element or a softening tank with a built-in softening resin, etc., and the secondary water treatment device of the water treatment system can be any water treatment device, the filter element of which can be any water treatment filter element, such as an ultrafiltration filter element, an activated carbon filter element, a screen filter, a laminated filter, a softening filter element or a softening tank with a built-in softening resin, etc. Accordingly, the filter elements of the primary and secondary water treatment devices of the water treatment system may be the same or different. Preferably, the filter element of the primary water treatment device of the water treatment system is a purification filter element, and the filter element of the secondary water treatment device of the water treatment system is a softening filter element (or a softening tank).

Another advantage of the present invention is that it provides a water treatment system, wherein the control valve of the water treatment system is a flat valve, and the water treatment device of the water treatment system and the flat valve are communicated through corresponding water paths to control the water treatment water paths.

Another advantage of the present invention is that it provides a water treatment system in which the flat valve of the water treatment system can control water flow to achieve continuous water supply while the water treatment device is being forward washed or backwashed, thereby avoiding water supply interruption.

Another advantage of the present invention is that it provides a water treatment system wherein the flat valve of the water treatment system is capable of controlling the forward or reverse washing of individual water treatment devices of the water treatment system.

Another advantage of the present invention is that it provides a water treatment system wherein when the water treatment system is in a first operational state, a water circuit is formed connecting a primary water treatment device (or first water treatment device) and a secondary water treatment device (or second water treatment device) in series, and the first water treatment device of the water treatment system is located upstream of the second water treatment device, thereby enabling the second water treatment device to treat, e.g., further soften, treated water from the first water treatment device, e.g., to obtain clean softened water. Preferably, the treated water treated by the first water treatment device can be directly provided to a user through one water path or flows to and is treated by the second water treatment device through another water path.

Another advantage of the present invention is that it provides a water treatment system, wherein the first water treatment device, the second water treatment device and the flat valve of the water treatment system are communicated with each other through corresponding water paths, thereby realizing the control of the water paths and the treatment of water. In particular, the treated water treated by the first water treatment device is respectively flowed to two different water outlets to supply different treated water such as purified water and softened water separately or simultaneously.

Another advantage of the present invention is that it provides a water treatment system, wherein a flat valve of the water treatment system can simultaneously control the flow of water in a water circuit associated with a first water treatment device and the flow of water in a water circuit associated with a second water treatment device to flow in different directions without interfering with each other, so as to control the first water treatment device and the second water treatment device of the water treatment system to separately and/or simultaneously perform water treatment and re-treatment on raw water or water to be treated, thereby separately and/or simultaneously providing different treated water, such as purified water and softened water, to a user according to the user's needs. In other words, the planar valve of the water treatment system enables the water treatment system of the present invention to simultaneously control the first water treatment device associated waterway and the second water treatment device associated waterway through a single planar valve.

Another advantage of the present invention is that it provides a water treatment system suitable for pre-treating and re-treating raw water, wherein the water treatment system does not require precise parts and complicated structures, and is simple in manufacturing process and low in cost.

Additional advantages and features of the invention will be set forth in the detailed description which follows and in part will be apparent from the description, or may be learned by practice of the invention as set forth hereinafter.

In accordance with the present invention, the foregoing and other objects and advantages are achieved by a water treatment system comprising:

a first water treatment device, wherein the first water treatment device has a first communication opening and a second communication opening;

a second water treatment device, wherein the second water treatment device has a first communication opening and a second communication opening; and

a plane valve, wherein the plane valve comprises a valve body, a movable valve plate and a fixed valve plate, the valve body forms an inner cavity, a first opening, a second opening, a third opening, a fourth opening, a fifth opening, a sixth opening and a seventh opening, wherein the planar valve further has an eighth opening, wherein the movable valve plate and the fixed valve plate are both disposed in the inner cavity of the valve body, wherein the first opening of the valve body is communicated with the first communication opening of the first water treatment device, the second opening of the valve body is communicated with the second communication opening of the first water treatment device, the third opening of the valve body is communicated with the first communication opening of the second water treatment device, the fourth opening of the valve body is communicated with the second conducting opening of the second water treatment device, wherein the sixth opening of the valve body is communicated with the inner cavity.

In another aspect of the present invention, the present invention further provides a planar valve for a water treatment system, comprising:

a valve body;

a movable valve plate; and

a fixed valve plate, wherein the valve body forms an inner cavity, a first opening, a second opening, a third opening, a fourth opening, a fifth opening, a sixth opening and a seventh opening, wherein the movable valve plate and the fixed valve plate are both arranged in the inner cavity of the valve body, the first opening of the valve body is suitable for being communicated with a first communication opening of a first water treatment device of the water treatment system, the second opening of the valve body is adapted to communicate with a second communication opening of a first water treatment device of the water treatment system, the third opening of the valve body is adapted to communicate with a first communication opening of a second water treatment device of the water treatment system, the fourth opening of the valve body is suitable for being communicated with a second conducting opening of a second water treatment device of the water treatment system, wherein the sixth opening of the valve body is communicated with the inner cavity.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims. Drawings

FIG. 1 is a perspective view of a water treatment system according to a first preferred embodiment of the present invention.

FIG. 2 is an assembled view of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 3 is a perspective view of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 4 is an assembled view of the above-mentioned flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 5A is a perspective view of the valve body of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 5B is another perspective view of the valve body of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 5C is a perspective view of the valve body and the stationary plate of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 5D is a perspective view of the movable valve plate, the fixed valve plate and the valve body of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 6 is a sectional view of the above-mentioned planar valve of the water treatment system according to the first preferred embodiment of the present invention, in which the ninth passage is shown to communicate with the eighth opening.

FIG. 7A is a perspective view of the stationary plate of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 7B is a perspective view of the movable valve plate of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 7C is a top view of the stationary plate of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 7D is a top view of the movable valve plate of the planar valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 7E is a bottom view of the stationary plate of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 7F is a bottom view of the movable valve plate of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 8A is another sectional view of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in a first operational position.

FIG. 8B is another sectional view of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in the first operational position.

FIG. 8C is another sectional view of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in the first operational position.

FIG. 8D is another sectional view of the flat valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the flat valve of the water treatment system is shown in the first working position.

FIG. 8E is another sectional view of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in the first operational position.

FIG. 9 is another sectional view of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the planar valve of the water treatment system of the present invention is shown in a second operational position.

FIG. 10 is another sectional view of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in a third operational position.

FIG. 11 is another sectional view of the flat valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the flat valve of the water treatment system is shown in a fourth operating position.

FIG. 12 is another sectional view of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the planar valve of the water treatment system of the present invention is shown in a fifth operational position.

FIG. 13A is a schematic structural diagram of a water treatment system according to a first preferred embodiment of the present invention, wherein the water treatment system is shown in a water treatment operation state, and arrows are shown in the diagram.

FIG. 13B is another schematic view of the water treatment system according to the first preferred embodiment of the present invention, wherein the water treatment system is in a second filter element backwashing operation state, and the arrow indicates a water flow direction.

FIG. 13C is another schematic view of the water treatment system according to the first preferred embodiment of the present invention, wherein the water treatment system is in the first filter element backwashing operation state, and the arrow indicates the water flow direction.

FIG. 13D is another schematic view of the water treatment system in accordance with the first preferred embodiment of the present invention, wherein the water treatment system is shown in a second cartridge normal washing mode, and the arrows indicate the water flow direction.

FIG. 13E is another schematic view of the water treatment system in accordance with the first preferred embodiment of the present invention, wherein the water treatment system is shown in a first cartridge forward washing mode, and the arrows indicate the water flow direction.

FIG. 14A is a schematic structural diagram of the stationary plate of the flat valve of the water treatment system according to the first preferred embodiment of the present invention.

Fig. 14B is a schematic structural diagram of the movable valve plate of the planar valve of the water treatment system according to the first preferred embodiment of the invention, wherein the broken line in the diagram shows the conducting channel of the movable valve plate.

FIG. 14C is an isometric view of the stationary plate of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein each passage is shown as being disposed at a specific isometric position of the stationary plate.

FIG. 14D is an isometric view of the movable plate of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the view shows that each channel is disposed at a specific isometric position of the movable plate.

Fig. 15A is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the first working position of the flat valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

Fig. 15B is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the second working position of the flat valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

Fig. 15C is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the third operating position of the flat valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

FIG. 15D is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the fourth operating position of the flat valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

Fig. 15E is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the fifth operating position of the flat valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

FIG. 16A is a perspective view of the stationary plate of an alternative embodiment of the planar valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 16B is a perspective view of the movable valve plate of the alternative embodiment of the planar valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 16C is a top view of the stationary plate of the alternative implementation of the planar valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 16D is a top view of the movable valve plate of the alternative embodiment of the planar valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 16E is a bottom view of the stationary plate of the alternative implementation of the planar valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 16F is a bottom view of the movable valve plate of the alternative embodiment of the planar valve of the water treatment system according to the first preferred embodiment of the present invention.

FIG. 17A is a schematic diagram of the water treatment system according to the first preferred embodiment of the present invention, wherein the water treatment system is in a water treatment operation state, and the arrows are in the water flow direction.

FIG. 17B is a schematic view of another alternative embodiment of the water treatment system according to the first preferred embodiment of the present invention, wherein the water treatment system is shown in a second filter element backwashing operation state, and the arrows are in the water flow direction.

FIG. 17C is a schematic view of another alternative embodiment of the water treatment system according to the first preferred embodiment of the present invention, wherein the water treatment system is shown in a first filter element backwashing operation state, and the arrows are in the water flow direction.

FIG. 17D is another schematic diagram of the alternative embodiment of the water treatment system according to the first preferred embodiment of the present invention, wherein the water treatment system is shown in a second cartridge normal washing mode, wherein the arrows are in the direction of water flow.

Fig. 17E is another schematic diagram of the alternative embodiment of the water treatment system according to the first preferred embodiment of the present invention, wherein the water treatment system is shown in a first filter element forward washing mode, and the arrows are in the water flow direction.

FIG. 18A is a schematic structural diagram of the fixed valve plate of the alternative embodiment of the planar valve of the water treatment system according to the first preferred embodiment of the present invention.

Fig. 18B is a schematic structural diagram of the movable valve plate of the planar valve of the water treatment system according to the first preferred embodiment of the invention, wherein the broken line in the diagram shows the conducting channel of the movable valve plate.

FIG. 18C is an isometric view of the fixed valve plate of the alternative embodiment of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the figure shows that each channel is disposed at a specific isometric position of the fixed valve plate.

FIG. 18D is an isometric view of the movable valve plate of the alternative embodiment of the planar valve of the water treatment system according to the first preferred embodiment of the present invention, wherein the figure shows that each channel is disposed at a specific bisecting position of the movable valve plate.

Fig. 19A is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the planar valve in the first working position of the planar valve according to the alternative embodiment of the water treatment system of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the planar valve.

Fig. 19B is a schematic view of the communication between the passage of the movable valve plate and the passage of the fixed valve plate of the planar valve in the second working position of the planar valve according to the alternative embodiment of the water treatment system of the present invention, wherein the hatched portion in the figure shows the passage of the movable valve plate of the planar valve.

Fig. 19C is a schematic view of the communication between the passage of the movable valve plate and the passage of the fixed valve plate of the planar valve in the third working position of the planar valve according to the alternative embodiment of the water treatment system of the present invention, wherein the hatched portion in the figure shows the passage of the movable valve plate of the planar valve.

FIG. 19D is the schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the fourth operating position of the flat valve according to the alternative embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

FIG. 19E is the schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the planar valve in the fifth working position of the planar valve according to the alternative embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the planar valve.

FIG. 20 is a perspective view of a water treatment system according to a second preferred embodiment of the present invention.

FIG. 21 is an assembled view of a water treatment system according to a second preferred embodiment of the present invention.

FIG. 22 is a perspective view of a planar valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 23 is an assembled view of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 24A is a perspective view of the valve body of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 24B is another perspective view of the valve body of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 24C is a perspective view of the valve body and the stationary plate of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 24D is a perspective view of the movable valve plate, the fixed valve plate and the valve body of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 25 is a sectional view of the above-mentioned planar valve of the water treatment system according to the second preferred embodiment of the present invention, in which the ninth passage and the eighth opening are shown to communicate with each other.

FIG. 26A is a perspective view of the stationary plate of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 26B is a perspective view of the movable valve plate of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 26C is a top view of the stationary plate of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 26D is a top view of the movable plate of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 26E is a bottom view of the stationary plate of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 26F is a bottom view of the movable valve plate of the flat valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 27A is another sectional view of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in a first operational position.

FIG. 27B is another sectional view of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in the first operational position.

FIG. 27C is another sectional view of the flat valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the flat valve of the water treatment system is shown in the first operational position.

FIG. 27D is another sectional view of the flat valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the flat valve of the water treatment system is shown in the first operational position.

FIG. 27E is another sectional view of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in the first operational position.

FIG. 28 is another sectional view of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in a second operational position.

FIG. 29 is another sectional view of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in a third operational position.

FIG. 30 is another sectional view of the flat valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the flat valve of the water treatment system is shown in a fourth operating position.

FIG. 31 is another sectional view of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the planar valve of the water treatment system is shown in a fifth operational position.

FIG. 32A is a schematic structural view of a water treatment system according to a second preferred embodiment of the present invention, wherein the water treatment system is in a water treatment operation state, and arrows are pointing to water flow direction.

FIG. 32B is another schematic view of the water treatment system according to the second preferred embodiment of the present invention, wherein the water treatment system is in a second filter element backwashing operation state, and the arrow indicates a water flow direction.

FIG. 32C is another schematic view of the water treatment system according to the second preferred embodiment of the present invention, wherein the water treatment system is in the first filter element backwashing operation state, and the arrow indicates the water flow direction.

FIG. 32D is another schematic view of a water treatment system according to a second preferred embodiment of the present invention, wherein the water treatment system is shown in a second cartridge normal washing mode, and arrows indicate water flow.

FIG. 32E is another schematic view of a water treatment system according to a second preferred embodiment of the present invention, wherein the water treatment system is in a first cartridge forward washing mode, and the arrows indicate the water flow direction.

FIG. 33A is a schematic structural diagram of a stationary plate of a flat valve of a water treatment system according to a second preferred embodiment of the present invention.

Fig. 33B is a schematic structural diagram of the movable valve plate of the planar valve of the water treatment system according to the second preferred embodiment of the invention, wherein the broken line in the diagram shows the conducting channel of the movable valve plate.

FIG. 33C is an isometric view of the stationary plate of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein each passage is shown as being disposed at a specific isometric position of the stationary plate.

FIG. 33D is an isometric view of the movable plate of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the view shows that each channel is disposed at a specific isometric position of the movable plate.

FIG. 34A is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the first working position of the flat valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

FIG. 34B is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the second working position of the flat valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

FIG. 34C is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the third operating position of the flat valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

FIG. 34D is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the fourth operating position of the flat valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

FIG. 34E is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the fifth operating position of the flat valve according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

FIG. 35A is a perspective view of the stationary plate of an alternative embodiment of the planar valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 35B is a perspective view of the movable valve plate of the alternative embodiment of the planar valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 35C is a top view of the stationary plate of the alternative implementation of the planar valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 35D is a top view of the movable valve plate of the alternative embodiment of the planar valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 35E is a bottom view of the stationary plate of the alternative implementation of the planar valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 35F is a bottom view of the movable valve plate of the alternative embodiment of the planar valve of the water treatment system according to the second preferred embodiment of the present invention.

FIG. 36A is a schematic view of an alternative embodiment of the water treatment system according to the second preferred embodiment of the present invention, wherein the water treatment system is shown in a water treatment operation, and arrows are shown in the figure to indicate water flow direction.

FIG. 36B is a schematic view of another alternative embodiment of the water treatment system according to the second preferred embodiment of the present invention, wherein the water treatment system is shown in a second filter element backwashing operation, in which the arrows indicate the water flow direction.

FIG. 36C is a schematic view of another alternative embodiment of the water treatment system according to the second preferred embodiment of the present invention, wherein the water treatment system is shown in a first filter element backwashing operation state, and the arrows are in the water flow direction.

FIG. 36D is another schematic diagram of the alternative embodiment of the water treatment system according to the second preferred embodiment of the present invention shown in the second cartridge forward cleaning mode with the arrows pointing in the direction of water flow.

Fig. 36E is another schematic diagram of the alternative embodiment of the water treatment system according to the second preferred embodiment of the present invention, wherein the water treatment system is shown in a first cartridge forward washing mode, and the arrows are in the direction of water flow.

FIG. 37A is a schematic diagram of the structure of the fixed valve plate of the planar valve of the water treatment system according to the second preferred embodiment of the present invention.

Fig. 37B is a schematic structural diagram of the movable valve plate of the planar valve of the water treatment system according to the second preferred embodiment of the invention, wherein the broken line in the diagram shows the conducting channel of the movable valve plate.

FIG. 37C is an isometric view of the stationary plate of the alternative embodiment of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the figure shows that each passage is disposed at a specific isometric position of the stationary plate.

FIG. 37D is an isometric view of the movable valve plate of the alternative embodiment of the planar valve of the water treatment system according to the second preferred embodiment of the present invention, wherein the figure shows that each channel is disposed at a specific bisecting position of the movable valve plate.

FIG. 38A is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the planar valve in the first working position of the planar valve according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the planar valve.

FIG. 38B is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the planar valve in the second working position of the planar valve according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the planar valve.

FIG. 38C is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the planar valve in the third operating position of the planar valve according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the planar valve.

FIG. 38D is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the flat valve in the fourth operating position of the flat valve according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the flat valve.

FIG. 38E is a schematic view of the communication between the passage of the movable plate and the passage of the fixed plate of the planar valve in the fifth operating position of the planar valve according to the second preferred embodiment of the present invention, wherein the hatched portion in the figure shows the passage of the movable plate of the planar valve.

FIG. 39 is a flow chart of the water treatment method according to the preferred embodiment of the invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.

Referring to fig. 1 to 15E of the drawings, a water treatment system according to a first preferred embodiment of the present invention is illustrated, which is suitable for treating raw water or water to be treated, wherein the water treatment system comprises a fluid valve 10, a first water treatment device 20 and a second water treatment device 30, wherein the first water treatment device 20 comprises at least one first filter element 21, the second water treatment device comprises at least one second filter element 31, wherein the first water treatment device 20 has two communication openings, such as a first communication opening 201 and a second communication opening 202, and the second water treatment device 30 has two communication openings, such as a first communication opening 301 and a second communication opening 302. Correspondingly, the water inlets of the first filter element 21 of the first water treatment device 20 are all communicated with the first communication opening 201, the water outlets of the first filter element 21 of the first water treatment device 20 are all communicated with the second communication opening 202, the water inlets of the second filter element 31 of the second water treatment device 30 are all communicated with the first communication opening 301, and the water outlets of the second filter element 31 of the second water treatment device 30 are all communicated with the second communication opening 302. It is understood that when the first water treatment device 20 has only a single first filter element 21, the water inlet of the first filter element 21 can form the first communication opening 201 of the first water treatment device 20, the water outlet of the first filter element 21 can form the second communication opening 202 of the first water treatment device 20, when the second water treatment device 30 has only a single second filter element 31, the water inlet of the second filter element 31 can form the first communication opening 301 of the second water treatment device 30, and the water outlet of the second filter element 31 can form the second communication opening 302 of the second water treatment device 30. Thus, the first cartridge 21 of the first water treatment device 20 has at least one water inlet and at least one water outlet, and the second cartridge 31 of the second water treatment device 30 has at least one water inlet and at least one water outlet. Preferably, the first water treatment device 20 of the water treatment system according to the first preferred embodiment of the present invention is configured to perform a primary water treatment or pre-treatment on water, and the second water treatment device 30 is configured to perform a secondary water treatment or re-treatment on water.

It is noted that the type of the water treatment device of the water treatment system of the present invention is not limited herein, for example, the first water treatment device 20 of the water treatment system of the present invention is a water purification device, and the second water treatment device 30 is a water softening device, by way of example. However, in other embodiments, the first water treatment device 20 and the second water treatment device 30 of the water treatment system of the present invention are both water purification devices. In other embodiments, the first water treatment device 20 and the second water treatment device 30 of the water treatment system of the present invention are water softening devices. Accordingly, the first filter element 21 of the water treatment system according to the first preferred embodiment of the present invention may be a pre-filter, an ultra-filtration filter, an activated carbon filter, a softening filter element, or a softening tank containing a softening resin. The second filter element 31 of the water treatment system according to the first preferred embodiment of the present invention may be a pre-filter, an ultra-filtration filter, an activated carbon filter, a softening filter element, or a softening tank containing a softening resin. The water treatment material or device mentioned herein may be a screen, activated carbon, ultrafiltration thread, softened resin, PP wool, RO membrane, etc. according to actual needs.

For better illustration of the present invention, the water treatment system of the present invention will be disclosed and explained in the following description by taking the first water treatment device 20 as a water purification device and the second water treatment device 30 as a water softening device. It should be understood by those skilled in the art that the exemplary embodiments herein implementing the first water treatment device 20 as a purification device and the second water treatment device 30 as a softening device are merely examples and should not be construed as limiting the water treatment system of the present invention.

As shown in FIGS. 1 to 15E of the drawings, the fluid valve 10 of the water treatment system according to the first preferred embodiment of the present invention comprises a valve body 11 and a valve core 1, wherein the valve body 11 forms an inner cavity 110, a first opening 1101, a second opening 1102, a third opening 1103, a fourth opening 1104, a fifth opening 1105, a sixth opening 1106 and a seventh opening 1107, wherein the valve core 1 is disposed in the inner cavity 110, wherein the water treatment system according to the first preferred embodiment of the present invention has a first operating state, a second operating state, a third operating state, a fourth operating state and a fifth operating state, wherein when the water treatment system is in the first operating state, the fluid valve 10 forms a first communicating passage 1001 respectively communicating with the sixth opening 1106 and the first opening 1101 of the valve body 11, A second communicating passageway 1002 communicating with the second opening 1102 and the third opening 1103 of the valve body 11, respectively, a third communicating passageway 1003 communicating with the second opening 1102 and the seventh opening 1107 of the valve body 11, respectively, and a fourth communicating passageway 1004 communicating with the fourth opening 1104 and the fifth opening 1105 of the valve body 11, respectively; when the water treatment system is in the second working state, the fluid valve 10 forms a fifth communication channel 1005 communicated with the sixth opening 1106 and the fourth opening 1104 of the valve body 11 respectively and a sixth communication channel 1006 communicated with the third opening 1103 and an eighth opening 1108 of the valve body 11 respectively; when the water treatment system is in the third operating state, the fluid valve 10 forms a seventh communicating channel 1007 which is communicated with the sixth opening 1106 and the second opening 1102 of the valve body 11 respectively and an eighth communicating channel 1008 which is communicated with the first opening 1101 and the eighth opening 1108 of the valve body 11 respectively; when the water treatment system is in the fourth operating state, the fluid valve 10 forms a ninth communication channel 1009 communicating with the sixth opening 1106 and the third opening 1103 of the valve body 11, respectively, and a tenth communication channel 10010 communicating with the fourth opening 1104 and the eighth opening 1108 of the valve body 11, respectively; when the water treatment system is in the fifth operating state, the fluid valve 10 forms an eleventh communication channel 10011 communicating with the sixth opening 1106 and the first opening 1101 of the valve body 11, respectively, and a twelfth communication channel 10012 communicating with the second opening 1102 and the eighth opening 1108 of the valve body 11, respectively. Preferably, when the water treatment system is in the second operating state, the third operating state, the fourth operating state and the fifth operating state, the water treatment system further forms a thirteenth communication channel 10013 respectively communicated with the sixth opening 1106 and the fifth opening 1105 of the valve body 11 and a fourteenth communication channel 10014 respectively communicated with the sixth opening 1106 and the seventh opening 1107 of the valve body 11.

Referring to fig. 1 to 15E of the drawings, the fluid valve 10 of the water treatment system according to the first preferred embodiment of the present invention is a planar valve 10, wherein the planar valve 10 further includes a movable plate 13 and a fixed plate 12, wherein the fixed plate 12 has a first fluid control surface 120, the movable plate 13 has a second fluid control surface 130, wherein the movable plate 13 and the fixed plate 12 are both disposed in the inner cavity 110, wherein the second fluid control surface 130 of the movable plate 13 is disposed at the first fluid control surface 120 of the fixed plate 12, and the movable plate 13 is disposed to be capable of rotating relative to the fixed plate 12, wherein the first water treatment device (or the first filter element 21)20 has a first communication opening 201 and a second communication opening 202, wherein the second water treatment device (or the second filter element 31)30 has a first communication opening 301 and a second communication opening 302, wherein the inner cavity 110 of the valve body 11 is communicated with the sixth opening 1106, the first communication opening 201 of the first water treatment device 20 is communicated with the first opening 1101 of the valve body 11, the second communication opening 202 of the first water treatment device 20 is communicated with the second opening 1102 of the valve body 11, the first communication opening 301 of the second water treatment device 30 is communicated with the third opening 1103 of the valve body 11, and the second communication opening 302 of the second water treatment device 30 is communicated with the fourth opening 1104 of the valve body 11. Therefore, when the fluid valve 10 is a flat valve, the spool 1 of the fluid valve 10 includes the movable valve plate 13 and the fixed valve plate 12.

It can be understood by those skilled in the art that the flat valve 10 of the water treatment system of the present invention may further have a connection mechanism, such as a connection screw, a snap joint, etc., disposed on the valve body 11, so that the flat valve 10 can be connected with other structural components of the water treatment system, such as the first water treatment device 20, the second water treatment device 30, etc., to guide the water flow to the respective communication channels formed by the first water treatment device 20, the second water treatment device 30 and the flat valve 10.

As shown in fig. 8A to 12 and 13A to 13E of the drawings, the water treatment system according to the first preferred embodiment of the present invention has a first operating state, a second operating state, a third operating state, a fourth operating state and a fifth operating state, when the water treatment system is in the first working state, the movable valve plate 13 and the fixed valve plate 12 of the flat valve 10 form the first communicating channel 1001 respectively communicated with the first opening 1101 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the second communicating channel 1002 respectively communicated with the second opening 1102 and the third opening 1103 of the valve body 11, the third communicating channel 1003 respectively communicated with the second opening 1102 and the seventh opening 1107 of the valve body 11, and the fourth communicating channel 1004 respectively communicated with the fourth opening 1104 and the fifth opening 1105 of the valve body 11; when the water treatment system is in the second working state, the movable valve plate 13 and the fixed valve plate 12 of the flat valve 10 form the fifth communication channel 1005 respectively communicated with the fourth opening 1104 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11 and the sixth communication channel 1006 respectively communicated with the third opening 1103 and the eighth opening 1108 of the valve body 11; when the water treatment system is in the third operating state, the movable valve plate 13 and the fixed valve plate 12 of the flat valve 10 form the seventh communicating channel 1007 respectively communicated with the second opening 1102 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11 and the eighth communicating channel 1008 respectively communicated with the first opening 1101 and the eighth opening 1108 of the valve body 11; when the water treatment system is in the fourth working state, the movable valve plate 13 and the fixed valve plate 12 of the planar valve 10 form the ninth communicating channel 1009 which is respectively communicated with the third opening 1103 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11 and the tenth communicating channel 10010 which is respectively communicated with the fourth opening 1104 and the eighth opening 1108 of the valve body 11; when the water treatment system is in the fifth operating state, the movable valve plate 13 and the fixed valve plate 12 of the flat valve 10 form the eleventh communicating channel 10011 respectively communicated with the first opening 1101 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11 and the twelfth communicating channel 10012 respectively communicated with the second opening 1102 and the eighth opening 1108 of the valve body 11. Preferably, when the water treatment system is in the second operating state, the third operating state, the fourth operating state and the fifth operating state, the movable valve plate 13 and the fixed valve plate 12 of the planar valve 10 form the thirteenth communication channel 10013 respectively communicated with the fifth opening 1105 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11 and the fourteenth communication channel 10014 respectively communicated with the seventh opening 1107 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11.

As shown in fig. 8A to 8E, 13A and 15A of the drawings, when the water treatment system according to the first preferred embodiment of the present invention is in the first working state, the first communication channel 1001 formed by the flat valve 10 is respectively communicated with the first opening 1101 and the sixth opening 1106 (or the inner chamber 110) of the valve body 11, the second communication channel 1002 is respectively communicated with the second opening 1102 and the third opening 1103 of the valve body 11, the third communication channel 1003 is respectively communicated with the second opening 1102 and the seventh opening 1107 of the valve body 11, the fourth communication channel 1004 is respectively communicated with the fourth opening 1104 and the fifth opening 1105 of the valve body 11, thereby allowing the raw water to flow into the inner chamber 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, and then to flow into the first raw water treatment device 20 of the first water treatment device 20 through the first communication channel 1001 of the flat valve 10, the first opening 1101 of the valve body 11 and the first raw water treatment device 20 After the raw water is purified (or treated) by the first water treatment device 20, the raw water flows out from the second communication opening 202 of the first water treatment device 20, the purified water continuously flows into the flat valve 10 through the second opening 1102 of the valve body 11, and then the purified water is divided into two paths, wherein one path of purified water flows into the second water treatment device 30 through the second communication passage 1002 of the flat valve 10, the third opening 1103 of the valve body 11 and the first communication opening 301 of the second water treatment device 30, and after being softened (or treated) by the second water treatment device 30, the purified water sequentially flows out through the second communication opening 302 of the second water treatment device 30, the fourth opening 1104 of the valve body 11, the fourth communication passage 1004 of the flat valve 10 and the fifth opening 1105 of the valve body 11 and supplies the water treated by the first water treatment device 20 and the second water treatment device 30 to the user, wherein the other path of purified water flows out through the third communicating passage 1003 and the seventh opening 1107 of the valve body 11 and supplies the water treated by the first water treatment device 20 to the user. Accordingly, the first operating state of the water treatment system corresponds to a water treatment operating state of the water treatment system. Therefore, when the water treatment system is in the first working state, the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the first opening 1101 of the valve body 11, the first communication opening 201 of the first water treatment device 20, the second communication opening 202 of the first water treatment device 20, the second opening 1102 of the valve body 11, the third opening 1103 of the valve body 11, the first communication opening 301 of the second water treatment device 30, the second communication opening 302 of the second water treatment device 30, the fourth opening 1104 of the valve body 11 and the fifth opening 1105 of the valve body 11 are communicated in turn, thereby forming a water flow path connecting the first water treatment device 20 and the second water treatment device 30 in series, so that the raw water can flow from the first water treatment device 20 to the second water treatment device 30 and be treated by the first water treatment device 20 and the second water treatment device 30 in sequence. In addition, when the water treatment system is in the first working state, the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the first opening 1101 of the valve body 11, the first communication opening 201 of the first water treatment device 20, the second communication opening 202 of the first water treatment device 20, the second opening 1102 of the valve body 11 and the seventh opening 1107 of the valve body 11 are sequentially communicated, so that a purification water path is formed, so that raw water can be treated by the first water treatment device 20 and then supplied to a user. The direction of the arrows in fig. 13A indicates the direction of water flow.

As shown in fig. 9, 13B and 15B of the drawings, when the water treatment system according to the first preferred embodiment of the present invention is in the second working state, the fifth communication channel 1005 formed by the planar valve 10 is respectively communicated with the fourth opening 1104 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the sixth communication channel 1006 is respectively communicated with the third opening 1103 and the eighth opening 1108 of the valve body 11, so as to allow raw water to flow from the sixth opening 1106 of the valve body 11 into the inner cavity 110 of the valve body 11, then flow into the fourth opening 1104 of the valve body 11 through the fifth communication channel 1005 formed by the valve body 11, flow into the second water treatment device 30 through the second communication opening 302 of the second water treatment device 30, and reversely flush softened materials (or water treatment materials) in the second water treatment device 30, such as softened resins, the resulting sewage or wastewater flows out of the first communication opening 301 of the second water treatment device 30, then flows into the sixth communication passage 1006 of the flat valve 10 through the third opening 1103 of the valve body 11, and then flows out of the eighth opening 1108 of the valve body 11. In other words, when the water treatment system is in the second operation state, the water treatment system of the present invention can control the back flushing of the second water treatment device 30. Accordingly, in the second operating state of the water treatment system, the flat valve 10 of the water treatment system controls the water flow to perform the back flushing on the second filter element 31 of the second water treatment device 30, and therefore, the second operating state of the water treatment system corresponds to the second filter element back flushing operating state of the water treatment system. Therefore, when the water treatment system is in the second working state, the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the fourth opening 1104 of the valve body 11, the second communication opening 302 of the second water treatment device 30, the first communication opening 301 of the second water treatment device 30, the third opening 1103 of the valve body 11 and the eighth opening 1108 of the valve body 11 are sequentially communicated, so as to form a water flow path, so that raw water can flow through the second water treatment device 30 and reversely flush the second water treatment device 30 by the raw water, and the obtained sewage or wastewater flows out from the eighth opening 1108 of the valve body 11. The direction of the arrows in fig. 13B indicates the direction of water flow.

Preferably, the thirteenth communication channel 10013 formed by the flat valve 10 is respectively communicated with the fifth opening 1105 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, and the fourteenth communication channel 10014 formed by the flat valve 10 is respectively communicated with the seventh opening 1107 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, so as to allow raw water to flow from the sixth opening 1106 of the valve body 11 into the inner cavity 110 of the valve body 11, and then the thirteenth communication channel 10013 formed by the flat valve 10 flows through the fifth opening 1105 of the valve body 11 and flows out to supply raw water to a user and the fourteenth communication channel 10014 formed by the flat valve 10 flows through the seventh opening 1107 of the valve body 11 and flows out to supply raw water to a user. That is, when the water treatment system is in the second working state, the water treatment system can continuously supply raw water to a user so as to avoid water supply interruption. In other words, when the water treatment system of the present invention performs the back flushing of the second water treatment device 30, the water treatment system can still continuously provide the raw water to the user to avoid the interruption of the water supply.

As shown in fig. 10, 13C and 15C of the drawings, when the water treatment system according to the first preferred embodiment of the present invention is in the third operation state, the seventh communication channel 1007 formed by the flat valve 10 is respectively communicated with the second opening 1102 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the eighth communication channel 1008 is respectively communicated with the first opening 1101 and the eighth opening 1108 of the valve body 11, so as to allow raw water to flow into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flow into the second opening 1102 of the valve body 11 through the seventh communication channel 1007 formed by the flat valve 10, flow into the first water treatment device 20 through the second communication opening 202 of the first water treatment device 20, and flow out the obtained sewage or wastewater from the first communication opening 201 of the first water treatment device 20 after reverse flushing the first water treatment device 20, then flows through the first opening 1101 of the valve body 11 into the eighth communication passage 1008 of the flat valve 10, and then flows out from the eighth opening 1108 of the valve body 11. In other words, when the water treatment system is in the third operating state, the water treatment system of the present invention can control the back flushing of the first water treatment device 20. Accordingly, in the third operating state of the water treatment system, the flat valve 10 of the water treatment system controls the water flow to perform the back flushing on the first filter element 21 of the first water treatment device 20, so that the third operating state of the water treatment system corresponds to the back flushing operating state of the first filter element of the water treatment system. Therefore, when the water treatment system is in the third operating state, the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the second opening 1102 of the valve body 11, the second communication opening 202 of the first water treatment device 20, the first communication opening 201 of the first water treatment device 20, the first opening 1101 of the valve body 11 and the eighth opening 1108 of the valve body 11 are sequentially communicated, so that a water flow path is formed, so that raw water can flow through the first water treatment device 20 and reversely flush the first water treatment device 20 by the raw water, and the obtained sewage or wastewater flows out from the eighth opening 1108 of the valve body 11. The direction of the arrows in fig. 13C indicates the direction of water flow.

Preferably, the thirteenth communication channel 10013 formed by the flat valve 10 is respectively communicated with the fifth opening 1105 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, and the fourteenth communication channel 10014 formed by the flat valve 10 is respectively communicated with the seventh opening 1107 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, so as to allow raw water to flow from the sixth opening 1106 of the valve body 11 into the inner cavity 110 of the valve body 11, and then the thirteenth communication channel 10013 formed by the flat valve 10 flows through the fifth opening 1105 of the valve body 11 and flows out to supply raw water to a user and the fourteenth communication channel 10014 formed by the flat valve 10 flows through the seventh opening 1107 of the valve body 11 and flows out to supply raw water to a user. That is, when the water treatment system is in the third operating state, the water treatment system can continuously supply raw water to a user to avoid water supply interruption. In other words, when the water treatment system of the present invention performs the back flushing of the first water treatment device 20, the water treatment system can still continuously provide the raw water to the user to avoid the interruption of the water supply.

As shown in fig. 11, 13D and 15D of the drawings, when the water treatment system according to the first preferred embodiment of the present invention is in the fourth operating state, the ninth communication channel 1009 formed by the flat valve 10 is respectively communicated with the third opening 1103 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the tenth communication channel 10010 formed by the flat valve 10 is respectively communicated with the fourth opening 1104 and the eighth opening 1108 of the valve body 11, so as to allow raw water to flow into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flow into the third opening 1103 of the valve body 11 through the ninth communication channel 1009 formed by the flat valve 10, flow into the second water treatment device 30 through the first communication opening 301 of the second water treatment device 30, and flow out from the second communication opening 302 of the second water treatment device 30 after forward flushing the second water treatment device 30, then flows through the fourth opening 1104 of the valve body 11 into the tenth communication passage 10010 of the planar valve 10 and then flows out of the eighth opening 1108 of the valve body 11. In other words, when the water treatment system is in the fourth operating state, the water treatment system of the present invention can control the forward flushing of the second water treatment device 30. Accordingly, in the fourth operating state of the water treatment system, the planar valve 10 of the water treatment system controls the water flow to perform the forward washing on the second filter element 31 of the second water treatment device 30, and therefore, the fourth operating state of the water treatment system corresponds to the second filter element forward washing operating state of the water treatment system. Therefore, when the water treatment system is in the fourth operating state, the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the third opening 1103 of the valve body 11, the first through opening 301 of the second water treatment device 30, the second through opening 302 of the second water treatment device 30, the fourth opening 1104 of the valve body 11 and the eighth opening 1108 of the valve body 11 are sequentially communicated, so as to form a water flow path, so that raw water can flow through the second water treatment device 30 and the second water treatment device 30 is being flushed by the raw water, and the obtained sewage or wastewater flows out from the eighth opening 1108 of the valve body 11. The direction of the arrows in fig. 13D indicates the direction of water flow.

Preferably, the thirteenth communication channel 10013 formed by the flat valve 10 is respectively communicated with the fifth opening 1105 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, and the fourteenth communication channel 10014 formed by the flat valve 10 is respectively communicated with the seventh opening 1107 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, so as to allow raw water to flow from the sixth opening 1106 of the valve body 11 into the inner cavity 110 of the valve body 11, and then the thirteenth communication channel 10013 formed by the flat valve 10 flows through the fifth opening 1105 of the valve body 11 and flows out to supply raw water to a user and the fourteenth communication channel 10014 formed by the flat valve 10 flows through the seventh opening 1107 of the valve body 11 and flows out to supply raw water to a user. That is, when the water treatment system is in the fourth operating state, the water treatment system can continuously supply raw water to a user to avoid water supply interruption. In other words, when the water treatment system of the present invention performs the forward flushing of the second water treatment device 30, the water treatment system can still continuously provide the raw water to the user to avoid the interruption of the water supply.

As shown in fig. 12, 13E and 15E of the drawings, when the water treatment system according to the first preferred embodiment of the present invention is in the fifth working state, the eleventh communication channel 10011 formed by the flat valve 10 is respectively communicated with the first opening 1101 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the twelfth communication channel 10012 formed by the flat valve 10 is respectively communicated with the second opening 1102 and the eighth opening 1108 of the valve body 11, so as to allow raw water to flow into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flow into the first opening 1101 of the valve body 11 through the eleventh communication channel 10011 formed by the flat valve 10, flow into the first water treatment device 20 through the first communication opening 201 of the first water treatment device 20, and flow out the second communication opening 202 of the first water treatment device 20 after forward flushing the first water treatment device 20, then flows through the second opening 1102 of the valve body 11 into the twelfth communication passage 10012 of the planar valve 10 and then flows out of the eighth opening 1108 of the valve body 11. In other words, when the water treatment system is in the fifth operating state, the water treatment system of the present invention can control the forward flushing of the first water treatment device 20. Accordingly, in the fifth operating state of the water treatment system, the flat valve 10 of the water treatment system controls the water flow to perform the forward flushing of the first filter element 21 of the first water treatment device 20, so that the fifth operating state of the water treatment system corresponds to the first filter element forward flushing operating state of the water treatment system. Therefore, when the water treatment system is in the fifth working state, the sixth opening 1106 (or the inner cavity 110) of the valve body 11, the first opening 1101 of the valve body 11, the first communication opening 201 of the first water treatment device 20, the second communication opening 202 of the first water treatment device 20, the second opening 1102 of the valve body 11 and the eighth opening 1108 of the valve body 11 are sequentially communicated, so that a water flow path is formed, so that raw water can flow through the first water treatment device 20 and the first water treatment device 20 is being flushed by the raw water, and the obtained sewage or wastewater flows out from the eighth opening 1108 of the valve body 11. The direction of the arrows in fig. 13E indicate the direction of water flow.

Preferably, the thirteenth communication channel 10013 formed by the flat valve 10 is respectively communicated with the fifth opening 1105 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, and the fourteenth communication channel 10014 formed by the flat valve 10 is respectively communicated with the seventh opening 1107 and the sixth opening 1106 (or the inner cavity 110) of the valve body 11, so as to allow raw water to flow from the sixth opening 1106 of the valve body 11 into the inner cavity 110 of the valve body 11, and then the thirteenth communication channel 10013 formed by the flat valve 10 flows through the fifth opening 1105 of the valve body 11 and flows out to supply raw water to a user and the fourteenth communication channel 10014 formed by the flat valve 10 flows through the seventh opening 1107 of the valve body 11 and flows out to supply raw water to a user. That is, when the water treatment system is in the fifth operating state, the water treatment system can continuously supply raw water to a user to avoid water supply interruption. In other words, when the water treatment system of the present invention performs the forward flushing of the first water treatment device 20, the water treatment system can still continuously provide the raw water to the user to avoid the interruption of the water supply.

Accordingly, as shown in fig. 13A to 15E of the drawings, the fluid valve (or planar valve) 10 of the water treatment system according to the first preferred embodiment of the present invention has a first working position, a second working position, a third working position, a fourth working position and a fifth working position, wherein when the fluid valve (or planar valve) 10 is in the first working position, the valve cartridge 1 of the fluid valve (or planar valve) 10 forms the first communicating channel 1001, the second communicating channel 1002, the third communicating channel 1003 and the fourth communicating channel 1004; when the fluid valve (or planar valve) 10 is in the second operating position, the spool 1 of the fluid valve 10 forms the fifth communication passage 1005 and the sixth communication passage 1006; when the fluid valve (or planar valve) 10 is in the third operating position, the spool 1 of the fluid valve 10 forms the seventh communication passage 1007 and the eighth communication passage 1008; when the fluid valve (or planar valve) 10 is in the fourth operating position, the spool 1 of the fluid valve 10 forms the ninth communication passage 1009 and the tenth communication passage 10010; when the fluid valve (or planar valve) 10 is in the fifth operating position, the spool 1 of the fluid valve 10 forms the eleventh communication passage 10011 and the twelfth communication passage 10012. More preferably, when the fluid valve (or planar valve) 10 is in the second operating position, the third operating position, the fourth operating position and the fifth operating position, the spool 1 of the fluid valve 10 further forms the thirteenth communication passage 10013 and the fourteenth communication passage 10014. It is understood that the first operating position of the flat valve 10 of the water treatment system corresponds to the water treatment operating position of the flat valve 10, the second operating position corresponds to the second filter element backwashing operating position of the flat valve 10, the third operating position corresponds to the first filter element backwashing operating position of the flat valve 10, the fourth operating position corresponds to the second filter element forward washing operating position of the flat valve 10, and the fifth operating position corresponds to the first filter element forward washing operating position of the flat valve 10.

As shown in fig. 7A to 7F and fig. 13A to 15E of the drawings, the flat valve 10 of the water treatment system according to the first preferred embodiment of the present invention has a first channel 101, a second channel 102, a third channel 103, a fourth channel 104, a fifth channel 105, a sixth channel 106, a seventh channel 107, an eighth channel 108, a ninth channel 109 and a tenth channel 1010, wherein the first channel 101, the second channel 102, the third channel 103, the fourth channel 104, the fifth channel 105 and the tenth channel 1010 are respectively disposed on the fixed valve plate 12 and respectively extend from the first fluid control surface 120 of the fixed valve plate 12; the sixth channel 106, the seventh channel 107, the eighth channel 108, and the ninth channel 109 are respectively disposed on the movable valve plate 13 and respectively extend from the second fluid control surface 130 of the movable valve plate 13, the first channel 101 is communicated with the first opening 1101, the second channel 102 is communicated with the second opening 1102, the third channel 103 is communicated with the third opening 1103, the fourth channel 104 is communicated with the fourth opening 1104, the fifth channel 105 is communicated with the fifth opening 1105, the tenth channel 1010 is communicated with the seventh opening 1107, the sixth channel 106 is communicated with the inner cavity 110 of the valve body 11, and the ninth channel 109 is communicated with the eighth opening 1108 of the valve body 11. In addition, in order to ensure that the water in the inner cavity 110 of the valve body 11 enters the sixth channel 106, the sixth channel 106 is arranged to be constantly in communication with the inner cavity 110 of the valve body 11 through a water inlet 1061 which is constantly in communication with the external space.

As shown in fig. 15A to 15E of the drawings, the movable valve plate 13 of the flat valve 10 of the water treatment system according to the first preferred embodiment of the present invention can rotate relative to the fixed valve plate 12, so that the flat valve 10 has the first working position, the second working position, the third working position, the fourth working position and the fifth working position, wherein when the flat valve 10 is in the first working position, the sixth channel 106 of the flat valve 10 is communicated with the first channel 101, the seventh channel 107 is communicated with the second channel 102 and the third channel 103, the seventh channel 107 is communicated with the second channel 102 and the tenth channel 1010, respectively, the eighth channel 108 is communicated with the fourth channel 104 and the fifth channel 105, respectively, in other words, when the flat valve 10 is in the first working position, the seventh channel 107 is communicated with the second channel 102, the fifth channel 105, respectively, The third channel 103 is communicated with the tenth channel 1010; when the flat valve 10 is in the second working position, the sixth passage 106 is communicated with the fourth passage 104, and the ninth passage 109 is communicated with the third passage 103; when the flat valve 10 is in the third working position, the sixth passage 106 is communicated with the second passage 102, and the ninth passage 109 is communicated with the first passage 101; when the flat valve 10 is in the fourth working position, the sixth passage 106 is communicated with the third passage 103, and the ninth passage 109 is communicated with the fourth passage 104; when the flat valve 10 is in the fifth operating position, the sixth passage 106 is in communication with the first passage 101, and the ninth passage 109 is in communication with the second passage 102. Preferably, when the planar valve 10 is in the second operating position, the third operating position, the fourth operating position and the fifth operating position, the fifth channel 105 is communicated with the inner cavity 110 (or the sixth opening 1106) of the valve body 11, and the tenth channel 1010 is communicated with the inner cavity 110 (or the sixth opening 1106) of the valve body 11.

More preferably, wherein when the planar valve 10 is in the first working position, the ninth channel 109 is closed by the fixed valve plate 12; when the flat valve 10 is in the second working position, the seventh passage 107 is communicated with the first passage 101, and the eighth passage 108 is communicated with the second passage 102; when the flat valve 10 is in the third working position, the seventh passage 107 is communicated with the fourth passage 104, and the eighth passage 108 is communicated with the third passage 103; when the flat valve 10 is in the fourth working position, the seventh passage 107 is communicated with the second passage 102, and the eighth passage 108 is communicated with the first passage 101; when the flat valve 10 is in the fifth working position, the seventh passage 107 is communicated with the third passage 103, and the eighth passage 108 is communicated with the fourth passage 104.

It can be understood that when the flat valve 10 is in the first working position, the water treatment system according to the first preferred embodiment of the present invention is controlled to be in the water treatment working state, the sixth channel 106 of the flat valve 10 is communicated with the first channel 101 to form the first communicating channel 1001, the seventh channel 107 is communicated with the second channel 102 and the third channel 103 to form the second communicating channel 1002, the seventh channel 107 is communicated with the second channel 102 and the tenth channel 1010 to form the third communicating channel 1003, and the eighth channel 108 is communicated with the fourth channel 104 and the fifth channel 105 to form the fourth communicating channel 1004; when the flat valve 10 is at the second working position, the water treatment system according to the first preferred embodiment of the present invention is controlled to be in the second filter element backwashing working state, the sixth channel 106 of the flat valve 10 is communicated with the fourth channel 104 to form the fifth communication channel 1005, and the ninth channel 109 is communicated with the third channel 103 to form the sixth communication channel 1006; when the flat valve 10 is at the third working position, the water treatment system according to the first preferred embodiment of the present invention is controlled to be in the first filter element backwashing working state, the sixth channel 106 of the flat valve 10 is communicated with the second channel 102 to form the seventh communication channel 1007, and the ninth channel 109 is communicated with the first channel 101 to form the eighth communication channel 1008; when the flat valve 10 is in the fourth working position, the water treatment system according to the first preferred embodiment of the present invention is controlled to be in the second filter element forward washing working state, the sixth channel 106 of the flat valve 10 is communicated with the third channel 103 to form the ninth communication channel 1009, and the ninth channel 109 is communicated with the fourth channel 104 to form the tenth communication channel 10010; when the planar valve 10 is in the fifth operating position, the water treatment system according to the first preferred embodiment of the present invention is controlled to be in the first filter core forward washing operating state, the sixth channel 106 of the planar valve 10 is communicated with the first channel 101 to form the eleventh communicating channel 10011, and the ninth channel 109 is communicated with the second channel 102 to form the twelfth communicating channel 10012. Further, when the flat valve 10 is respectively located at the second working position, the third working position, the fourth working position and the fifth working position, the water treatment system according to the first preferred embodiment of the present invention is respectively located at the second filter element backwashing working state, the first filter element backwashing working state, the second filter element forward washing working state and the first filter element forward washing working state, the fifth channel 105 of the flat valve 10 is communicated with the sixth opening 1106 (or the inner cavity 110 of the valve body 11) to form the thirteenth communication channel 10013, and the tenth channel 1010 of the flat valve 10 is communicated with the sixth opening 1106 (or the inner cavity 110 of the valve body 11) to form the fourteenth communication channel 10014.

As shown in fig. 8A to 8E, 13A and 15A of the drawings, correspondingly, when the planar valve 10 is at the first working position, the water treatment system is in a water treatment working state, raw water flows into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flows into the first passage 101 of the fixed valve plate 12 through the sixth passage 106 of the movable valve plate 13, then flows into the first communication opening 201 of the first water treatment device 20 through the first opening 1101 of the valve body 11, and after being treated by the water treatment material or device of the first water treatment device 20, purified water flowing out of the second communication opening 202 of the first water treatment device 20 flows through the second opening 1102 of the valve body 11, the second passage 102 of the fixed valve plate 12, and the seventh passage 107 of the movable valve plate 13 in sequence, and then is separated into two passages, wherein one passage of purified water flows to the third passage 103 of the fixed valve plate 12, The third opening 1103 of the valve body 11 and the first conducting opening 301 of the second water treatment device 30 enter the second water treatment device 30, and after being treated by the water treatment material or device of the second water treatment device 30, the purified water flows out from the second conducting opening 302 of the second water treatment device 30, then flows into the fourth channel 104 of the fixed valve plate 12 through the fourth opening 1104 of the valve body 11, flows out through the eighth channel 108 of the movable valve plate 13, the fifth channel 105 of the fixed valve plate 12 and the fifth opening 1105 of the valve body 11, and supplies the treated water to the user, wherein the other path of purified water flows to the tenth channel 1010 of the fixed valve plate 12, flows out from the seventh opening 1107 of the valve body 11, and supplies the purified water to the user; as shown in fig. 9, 13B and 15B of the drawings, when the flat valve 10 is at the second working position, the water treatment system is in the second filter element backwashing working state, raw water flows into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flows into the fourth passage 104 of the fixed valve plate 12 through the sixth passage 106 of the movable valve plate 13, then flows into the second conducting opening 302 of the second water treatment device 30 through the fourth opening 1104 of the valve body 11, and flows out of the first conducting opening 301 of the second water treatment device 30 after performing reverse flushing on the second water treatment device 30, then flows through the third opening 1103 of the valve body 11, then flows through the third passage 103 of the fixed valve plate 12 and the ninth passage 109 of the movable valve plate 13, and then flows out of the eighth opening 1108 of the flat valve 10; as shown in fig. 10, 13C and 15C of the drawings, when the flat valve 10 is at the third working position, the water treatment system is in the first filter element backwashing working state, raw water flows into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flows into the second passage 102 of the fixed valve plate 12 through the sixth passage 106 of the movable valve plate 13, then flows into the second communication opening 202 of the first water treatment device 20 through the second opening 1102 of the valve body 11, flows out of the first communication opening 201 of the first water treatment device 20 after performing reverse flushing on the first water treatment device 20, then flows through the first opening 1101 of the valve body 11, the first passage 101 of the fixed valve plate 12 and the ninth passage 109 of the movable valve plate 13, and flows out of the eighth opening 1108 of the flat valve 10; as shown in fig. 11, 13D and 15D of the drawings, when the flat valve 10 is at the fourth working position, the water treatment system is in the second filter element forward washing working state, raw water flows into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flows into the third passage 103 of the fixed valve plate 12 through the sixth passage 106 of the movable valve plate 13, then enters the first conducting opening 301 of the second water treatment device 30 through the third opening 1103 of the valve body 11, and after performing forward washing on the second water treatment device 30, flows out from the second conducting opening 302 of the second water treatment device 30, then flows through the fourth opening 1104 of the valve body 11, the fourth passage 104 of the fixed valve plate 12 and the ninth passage 109 of the movable valve plate 13, and then flows out from the eighth opening 1108 of the flat valve 10; as shown in fig. 12, 13E and 15E of the drawings, when the flat valve 10 is at the fifth operating position, the water treatment system is in the first filter element forward washing operating state, raw water flows into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flows into the first passage 101 of the fixed valve plate 12 through the sixth passage 106 of the movable valve plate 13, then flows into the first communication opening 201 of the first water treatment device 20 through the first opening 1101 of the valve body 11, performs forward washing on the first water treatment device 20, flows out from the second communication opening 202 of the first water treatment device 20, then flows through the second opening 1102 of the valve body 11, the second passage 202 of the fixed valve plate 12 and the ninth passage 109 of the movable valve plate 13, and flows out from the eighth opening 1108 of the flat valve 10.

It should be noted that the first channel 101, the second channel 102, the third channel 103, the fourth channel 104, the fifth channel 105 and the tenth channel 1010 of the flat valve 10 are separately disposed on the first fluid control surface 120 of the fixed valve plate 12; the sixth channel 106, the seventh channel 107, the eighth channel 108 and the ninth channel 109 are separately disposed on the second fluid control surface 130 of the movable valve plate 13. In other words, the first channel 101, the second channel 102, the third channel 103, the fourth channel 104, the fifth channel 105 and the tenth channel 1010 of the flat valve 10 form a channel opening of the first fluid control surface 120 disposed on the fixed valve plate 12, the sixth channel 106, the seventh channel 107, the eighth channel 108 and the ninth channel 109 respectively form a channel opening of the second fluid control surface 130 disposed on the movable valve plate 13, when the movable plate 13 and the fixed plate 12 of the flat valve 10 are disposed to face (the first fluid control surface 120) by the face (the second fluid control surface 130), and when the movable valve plate 13 rotates relative to the fixed valve plate 12, the channel disposed on the movable valve plate 13 and the channel disposed on the fixed valve plate 12 are selectively communicated through the corresponding channel openings, thereby forming a corresponding communication channel and controlling the flow direction of the fluid (such as water flow).

It is understood that the first channel 101, the second channel 102, the third channel 103, the fourth channel 104, the fifth channel 105, the sixth channel 106, the seventh channel 107, the eighth channel 108, the ninth channel 109 and the tenth channel 1010 of the planar valve 10 can have any extended path (or direction) that can achieve the communicating relationship herein; the first channel 101, the second channel 102, the third channel 103, the fourth channel 104, the fifth channel 105 and the tenth channel 1010 of the flat valve 10 are respectively formed at the channel opening of the first fluid control surface 120 of the fixed valve plate 12, and the sixth channel 106, the seventh channel 107, the eighth channel 108 and the ninth channel 109 are respectively formed at the channel opening of the second fluid control surface 130 of the movable valve plate 13, and may have any shape capable of realizing the mutual communication relationship therein. For example, the second channel 102 formed at the channel opening of the first fluid control surface 120 of the fixed valve plate 12 can be configured to have a regular shape, and can also be configured to have an irregular shape. Therefore, the extension paths (or directions) of the first channel 101, the second channel 102, the third channel 103, the fourth channel 104, the fifth channel 105, the sixth channel 106, the seventh channel 107, the eighth channel 108, the ninth channel 109 and the tenth channel 1010 of the planar valve 10 and the shapes of the channel openings thereof should not be construed as limitations of the present invention.

As shown in fig. 7A to 7F and fig. 14A to 14D of the drawings, the first channel 101, the fourth channel 104, the second channel 102 and the third channel 103 of the planar valve 10 of the water treatment system according to the first preferred embodiment of the present invention are arranged on the fixed valve plate 12 clockwise in this order, the fifth channel 105 is located outside the fourth channel 104, and the tenth channel 1010 is located outside the third channel 103; the sixth passage 106, the eighth passage 108, the ninth passage 109, and the seventh passage 107 of the flat valve 10 are arranged clockwise in this order on the movable valve plate 13. Optionally, the first channel 101, the fourth channel 104, the second channel 102 and the third channel 103 of the flat valve 10 are arranged on the fixed valve plate 12 counterclockwise in this order; the sixth passage 106, the eighth passage 108, the ninth passage 109, and the seventh passage 107 of the flat valve 10 are arranged counterclockwise in this order on the movable valve plate 13.

Referring to fig. 14A to 14D of the drawings, the fixed valve plate 12 of the flat valve 10 of the water treatment system according to the first preferred embodiment of the present invention has a first central portion 121, a first extending portion 122 extending outwardly from the first central portion 121, and a first edge portion 123 extending outwardly from the first extending portion 122, the movable valve plate 13 has a second central portion 131, a second extending portion 132 extending outwardly from the second central portion 131, and a second edge portion 133 extending outwardly from the second extending portion 132, wherein the first fluid control surface 120 of the fixed valve plate 12 has a central portion 1200 shown by a chain line in the drawing, wherein the central portion 1200 is disposed on the first central portion 121 of the fixed valve plate 12, and a portion of the first fluid control surface 120 outside the central portion 1200 is divided clockwise into a first portion 1200, a second portion, a third portion, a fourth portion, a fifth portion, a sixth, A second portion 1202, a third portion 1203, a fourth portion 1204, a fifth portion 1205, a sixth portion 1206, a seventh portion 1207, and an eighth portion 1208; the second fluid control surface 130 of the movable plate 13 of the flat valve 10 has a central area 1300 shown by a chain line in the figure, wherein the central area 1300 is disposed at the second central portion 131 of the movable plate 13, and the portion of the second fluid control surface 130 outside the central area 1300 is divided into a first area 1301, a second area 1302, a third area 1303, a fourth area 1304, a fifth area 1305, a sixth area 1306, a seventh area 1307, and an eighth area 1308 shown by dotted lines, which are clockwise and equally divided; wherein the first channel 101 extends downward from the first portion 1201 and the second portion 1202 of the first fluidic control surface 120, and the first channel 101 is a through hole; the fourth channel 104 extends downward from the third portion 1203 and the fourth portion 1204 of the first fluid control surface 120, and the fourth channel 104 is a through hole; the fifth channel 105 extends downward from the third portion 1203 of the first fluid control surface 120, and the fifth channel 105 is a through hole; the second channel 102 extends downward from the sixth portion 1206 of the first fluidic control surface 120, and the second channel 102 is a through hole; the third channel 103 extends downward from the seventh portion 1207 and the eighth portion 1208 of the first fluid control surface 120, and the third channel 103 is a through hole; the tenth channel 1010 extends downward from the seventh portion 1207 of the first fluid control surface 120, and the tenth channel 1010 is a through hole; the sixth channel 106 extends upward from the first region 1301 of the second flow control surface 130; the eighth channel 108 extends upward from the third area 1303 of the second fluid control surface 130, and the eighth channel 108 is a blind hole or a guiding groove; the ninth channel 109 extends upwardly from the fifth region 1305 of the second fluid control surface 130, and the ninth channel 109 is a through hole; the seventh channel 107 extends upwards from the sixth region 1306 and the seventh region 1307 of the second fluid control surface 130, and the seventh channel 107 is a blind hole or a channel.

It can be understood that, when the second fluid control surface 130 of the movable valve plate 13 is disposed on the first fluid control surface 120 of the fixed valve plate 12, the second central portion 131 of the second fluid control surface 130 of the movable valve plate 13 faces the first central portion 121 of the first fluid control surface 120 of the fixed valve plate 12, the second extending portion 132 of the second fluid control surface 130 of the movable valve plate 13 faces the first extending portion 122 of the first fluid control surface 120 of the fixed valve plate 12, and the second edge portion 133 of the second fluid control surface 130 of the movable valve plate 13 faces the first edge portion 123 of the first fluid control surface 120 of the fixed valve plate 12.

Optionally, the first fluid control surface 120 of the fixed valve plate 12 and the second fluid control surface 130 of the movable valve plate 13 of the planar valve 10 are both circular, the first channel 101, the second channel 102, the third channel 103, the fourth channel 104, the fifth channel 105, and the tenth channel 1010 are all radially disposed on the first fluid control surface 120 of the fixed valve plate 12, and the sixth channel 106, the seventh channel 107, the eighth channel 108, and the ninth channel 109 are all radially disposed on the second fluid control surface 130 of the movable valve plate 13.

Preferably, the first channel 101, the second channel 102, the third channel 103 and the fourth channel 104 of the flat valve 10 are respectively disposed at the first extending portion 122 of the first fluid control surface 120 of the fixed valve plate 12, and the fifth channel 105 and the tenth channel 1010 are respectively disposed at the first edge portion 123 of the first fluid control surface 120.

The sixth channel 106 and the ninth channel 109 of the flat valve 10 are respectively disposed at the second extension portion 132 of the second fluid control surface 130 of the movable valve plate 13, and the seventh channel 107 and the eighth channel 108 are disposed to extend from the second extension portion 132 of the second fluid control surface 130 of the movable valve plate 13 to the second edge portion 133.

Preferably, the first channel 101 of the flat valve 10 extends downward and outward from the first fluid control surface 120 of the fixed valve plate 12, the second channel 102 extends downward and outward from the first fluid control surface 120 of the fixed valve plate 12, the third channel 103 extends downward and outward from the first fluid control surface 120 of the fixed valve plate 12, the fourth channel 104 extends downward and outward from the first fluid control surface 120 of the fixed valve plate 12, the fifth channel 105 extends downward and outward from the first fluid control surface 120 of the fixed valve plate 12, and the tenth channel 1010 extends downward and outward from the first fluid control surface 120 of the fixed valve plate 12.

As shown in fig. 1 to 6 of the drawings, the valve body 11 of the flat valve 10 of the water treatment system according to the first preferred embodiment of the present invention has an inner wall 111, wherein the fixed valve plate 12 is adapted to be disposed in the inner cavity 110 with the first fluid control surface 120 facing upward, and the movable valve plate 13 is adapted to be disposed in the inner cavity 110 with the second fluid control surface 130 facing downward, wherein the inner cavity 110 is always in communication with the sixth channel 106. It should be noted that the fixed valve plate 12 of the flat valve 10 can be detachably disposed on the inner wall 111 of the valve body 11, or can be integrally formed with the inner wall 111 of the valve body 11 of the flat valve 10. It will be understood by those skilled in the art that when the stationary plate 12 is detachably disposed in the valve body 11, the stationary plate 12 and the valve body 11 maintain synchronization therebetween by a fixing mechanism, and the stationary plate 12 and the valve body 11 are fixed to each other. For example, the stationary plate 12 has a stopper protruding outward from the edge of the stationary plate 12, and the inner wall 111 of the valve body 11 has a stopper groove, wherein the stopper of the stationary plate 12 is configured to engage with the stopper groove of the inner wall 111 of the valve body 11 to ensure synchronization (or no relative rotation) between the stationary plate 12 and the valve body 11 and to ensure that each channel disposed on the stationary plate 12 communicates with a corresponding opening disposed on the valve body 11. It is understood that when the stationary valve plate 12 is detachably provided in the valve body 11, the stationary valve plate 12 may be separately manufactured. In other words, the stationary plate 12 can be made of a wear-resistant material, thereby increasing the service life of the stationary plate 12 (or the entire flat valve). Preferably, the first fluid control surface 120 of the stationary plate 12 is smoothed to reduce its roughness.

As shown in fig. 1 to 6 of the drawings, the flat valve 10 of the water treatment system according to the first preferred embodiment of the present invention further includes a flow guiding element 15, wherein the flow guiding element 15 forms a sewage channel 150, wherein the flow guiding element 15 is disposed to extend upward from the movable blade 13 and the sewage channel 150 of the flow guiding element 15 is respectively communicated with the eighth opening 1108 and the ninth channel 109 of the flat valve 10 (the eighth opening 1108 is disposed at the valve body 11 of the flat valve 10), or the sewage channel 150 is directly communicated with the eighth opening 1108 (the eighth opening 1108 is disposed at the movable blade 13 of the flat valve 10 and is communicated with the ninth channel 109), so that sewage or wastewater can flow out therefrom.

As shown in fig. 1 to 6 of the drawings, the planar valve 10 of the water treatment system according to the first preferred embodiment of the present invention further includes a driving element 18 extending upward from the movable valve plate 13, wherein the driving element 18 is configured to drive the movable valve plate 13 of the planar valve 10 to rotate relative to the fixed valve plate 12. In other words, the driving element 18 is disposed in connection with the movable valve plate 13 of the flat valve 10 to drive the movable valve plate 13 of the flat valve 10 to rotate relative to the fixed valve plate 12. Preferably, the drive element 18 is integrally formed with the deflector element 15. Alternatively, the driving element 18 and the deflector element 15 are two separate mechanisms.

As shown in fig. 1 to 6 of the drawings, the planar valve 10 of the water treatment system according to the first preferred embodiment of the present invention further includes a sealing element 17, wherein the sealing element 17 is disposed opposite to the driving element 18, wherein the sealing element 17 forms a first sealing surface 170, and the driving element 18 forms a second sealing surface 180, wherein the first sealing surface 170 of the sealing element 17 is disposed on the second sealing surface 180 of the driving element 18, so that when the driving element 18 rotates relative to the sealing element 17 to drive the movable plate 13 to rotate relative to the stationary plate 12, the driving element 18 and the sealing element 17 are sealed and prevent water leakage. Furthermore, the sealing element 17 is arranged to hold the driving element 18 in position, thereby holding the movable flap 13 in a preset position.

As shown in fig. 1 to 6 of the drawings, the diameter of the movable valve plate 13 of the flat valve 10 of the water treatment system according to the first preferred embodiment of the present invention is set to be slightly smaller than the diameter of the inner cavity 110 of the valve body 11, so that the sixth channel 106 of the flat valve 10 can be kept in communication with the inner cavity 110 of the valve body 11 through the water inlet 1061.

As shown in fig. 4, 8A to 8E, 13A and 15A of the drawings, a control device 16 of the flat valve 10 of the water treatment system according to the first preferred embodiment of the present invention is configured to drive the driving element 18 to rotate through a transmission mechanism 14, such as a transmission gear, according to a water treatment control command, so as to drive the movable valve plate 13 of the flat valve 10 to rotate relative to the fixed valve plate 12, thereby forming the first communication passage 1001 respectively communicating with the inner cavity 110 (or the sixth opening 1106) and the first opening 1101 of the valve body 11 of the flat valve 10, the second communication passage 1002 respectively communicating with the second opening 1102 and the third opening 1103 of the valve body 11, the third communication passage 1003 respectively communicating with the second opening 1102 and the seventh opening 1107 of the valve body 11, and the fourth communication passage 1004 respectively communicating with the fourth opening 1104 and the fifth opening 1105 of the valve body 11, so as to allow raw water to enter the inner cavity 110 from the sixth opening 1106 of the valve body 11, and flow into the first water treatment device 20 through the first communication channel 1001 formed by the planar valve 10, the first opening 1101 of the valve body 11, and the first communication opening 201 of the first water treatment device 20, purified water obtained after the raw water is purified by the first water treatment device 20 flows out from the second communication opening 202 of the first water treatment device 20, the purified water treated by the first water treatment device 20 can be divided into two paths after passing through the second opening 1102 of the valve body 11, wherein one path of purified water flows into the second water treatment device 30 through the second communication channel 1002 of the planar valve 10, the third opening 1103 of the planar valve 10, and the first communication opening 301 of the second water treatment device 30, and flows out from the second communication opening 302 of the second water treatment device 30 after being treated by the second water treatment device 30, then flows out through the fourth opening 1104 of the valve body 11, the fourth communication channel 1004 of the flat valve 10 and the fifth opening 1105 of the valve body 11 and supplies the treated water to the user, and the other path of purified water flows out through the third communication channel 1003 and the seventh opening 1107 of the valve body 11 and supplies the treated water to the user; as shown in fig. 4, 9, 13B and 15B of the drawings, according to a second filter element backwashing control command, the driving element 18 is driven to rotate through the transmission mechanism 14, such as a transmission gear, so as to drive the movable valve plate 13 of the flat valve 10 to rotate relative to the fixed valve plate 12, thereby forming the fifth communication channel 1005 respectively communicated with the inner cavity 110 (or the sixth opening 1106) and the fourth opening 1104 of the valve body 11 of the flat valve 10 and forming the sixth communication channel 1006 respectively communicated with the third opening 1103 and the eighth opening 1108 of the valve body 11, so as to allow raw water to flow into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flow into the fourth opening 1104 of the valve body 11 through the fifth communication channel 1005 formed by the flat valve 10, and then flow into the second water treatment device 30 through the second communication opening 302 of the second water treatment device 30, after the second water treatment device 30 is reversely flushed, the obtained sewage or wastewater flows out of the first communicating opening 301 of the second water treatment device 30, then flows into the sixth communicating channel 1006 of the flat valve 10 through the third opening 1103 of the valve body 11, and then flows out of the eighth opening 1108 of the flat valve 10; as shown in fig. 4, 10, 13C and 15C of the drawings, according to a first filter element backwashing control command, the driving element 18 is driven to rotate through the transmission mechanism 14, such as a transmission gear, so as to drive the movable valve plate 13 of the flat valve 10 to rotate relative to the fixed valve plate 12, thereby forming the seventh communication channel 1007 respectively communicated with the inner cavity 110 (or the sixth opening 1106) and the second opening 1102 of the valve body 11 and the eighth communication channel 1008 respectively communicated with the first opening 1101 and the eighth opening 1108 of the valve body 11, so as to allow raw water to flow into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flow into the second opening 1102 of the valve body 11 through the seventh communication channel 1007 formed by the flat valve 10, and then flow into the first water treatment device 20 through the second communication opening 202 of the first water treatment device 20, and after the first water treatment device 20 is reversely flushed, the obtained sewage or wastewater flows out of the first communication opening 201 of the first water treatment device 20, then flows into the eighth communication channel 1008 of the flat valve 10 through the first opening 1101 of the valve body 11, and then flows out of the eighth opening 1108 of the flat valve 10; as shown in fig. 4, 11, 13D and 15D of the drawings, according to a second filter core forward washing control command, the driving element 18 is driven to rotate through the transmission mechanism 14, such as a transmission gear, so as to drive the movable valve plate 13 of the planar valve 10 to rotate relative to the fixed valve plate 12, thereby forming the ninth communication passage 1009 respectively communicated with the inner cavity 110 (or the sixth opening 1106) and the third opening 1103 of the valve body 11 and the tenth communication passage 10010 respectively communicated with the fourth opening 1104 and the eighth opening 1108 of the valve body 11, so as to allow raw water to flow from the sixth opening 1106 of the valve body 11 into the inner cavity 110 of the valve body 11, then flow into the third opening 1103 of the valve body 11 through the ninth communication passage 1009 formed by the planar valve 10, and then flow into the second water treatment device 30 through the first communication opening 301 of the second water treatment device 30, and forward flushing the second water treatment device 30, wherein the obtained sewage or wastewater flows out from the second communication opening 302 of the second water treatment device 30, then flows into the tenth communication channel 10010 of the flat valve 10 through the fourth opening 1104 of the valve body 11, and then flows out from the eighth opening 1108 of the flat valve 10; as shown in fig. 4, 12, 13E and 15E of the drawings, according to a first filter core forward washing control command, the driving element 18 is driven to rotate through the transmission mechanism 14, such as a transmission gear, so as to drive the movable valve plate 13 of the planar valve 10 to rotate relative to the fixed valve plate 12, thereby forming an eleventh communication channel 10011 respectively communicated with the inner cavity 110 (or the sixth opening 1106) and the first opening 1101 of the valve body 11 and a twelfth communication channel 10012 respectively communicated with the second opening 1102 and the eighth opening 1108, so as to allow raw water to flow into the inner cavity 110 of the valve body 11 from the sixth opening 1106 of the valve body 11, then flow into the first opening of the valve body 11 through the eleventh communication channel 10011 formed by the planar valve 10, and then flow into the first water treatment device 20 through the first communication opening 201 of the first water treatment device 20, and performing a forward flushing on the first water treatment device 20, wherein the obtained sewage or wastewater flows out from the second communication opening 202 of the first water treatment device 20, then flows through the second opening 1102 of the valve body 11 into the twelfth communication channel 10012 of the flat valve 10, and then flows out from the eighth opening 1108 of the flat valve 10.

It should be noted that the control command, such as a water treatment control command, a second filter element backwashing control command, a first filter element backwashing control command, a second filter element forward washing control command, a first filter element forward washing control command, and the like, may be preset in the control module of the control device 16, may be received from a control terminal through an electronic communication network, or may be input by a user through an input interface. For example, when the water treatment system of the present invention is configured to have an input interface for the planar valve 10, such as a touch pad or a control button, a user can send the above control command to the control module of the control device 16 through a touch panel or a corresponding control button, so that the control module of the control device 16 controls the motor of the control device 16 to rotate, thereby driving the driving element 18 to rotate through the transmission mechanism 14.

Referring to fig. 16A to 19E, an alternative example of the flat valve 10A of the water treatment system according to the first preferred embodiment of the present invention is illustrated, wherein the flat valve 10A has a first passage 101A, a second passage 102A, a third passage 103A, a fourth passage 104A, a fifth passage 105A, a sixth passage 106A, a seventh passage 107A, an eighth passage 108A, a ninth passage 109A and a tenth passage 1010A, wherein the first passage 101A, the second passage 102A, the third passage 103A, the fourth passage 104A, the fifth passage 105A and the tenth passage 1010A are respectively provided at the fixed plate 12A and extend from the first fluid control surface 120A of the fixed plate 12A, wherein the sixth passage 106A, the seventh passage 107A, the eighth passage 108A and the ninth passage 109A are respectively provided at the second movable plate 13A and extend from the second fluid control surface 13A of the fixed plate 13A The fluid control surface 130A extends. The first channel 101A is communicated with the first opening 1101A, the second channel 102A is communicated with the second opening 1102A, the third channel 103A is communicated with the third opening 1103A, the fourth channel 104A is communicated with the fourth opening 1104A, the fifth channel 105A is communicated with the fifth opening 1105A, the tenth channel 1010A is communicated with the seventh opening 1107A, the sixth channel 106A is communicated with the inner cavity 110A of the valve body 11A, and the ninth channel 109A is communicated with the eighth opening 1108A of the flat valve 10A.

As shown in fig. 17A to 19E of the drawings, when the flat valve 10A is in the second working position, the third working position, the fourth working position and the fifth working position, one port of the fifth channel 105A of the flat valve 10A is closed by the movable valve plate 13A, the other port of the fifth channel 105A of the flat valve 10A is communicated with the fifth opening 1105A of the valve body 11A, one port of the tenth channel 1010A of the flat valve 10A is closed by the movable valve plate 13A, and the other port of the tenth channel 1010A of the flat valve 10A is communicated with the seventh opening 1107A of the valve body 11A. Therefore, when the planar valve 10A is located at the second working position, the third working position, the fourth working position and the fifth working position, the planar valve 10A can not form (or cannot form) the thirteenth communication channel 10013 and the fourteenth communication channel 10014. In other words, when the flat valve 10A is at the second, third, fourth and fifth working positions, the flat valve 10A can no longer provide raw water (or water to be treated) through the fifth and

seventh openings

1105A and 1107A.

Referring to fig. 20 to 34E of the drawings, a water treatment system according to a second preferred embodiment of the present invention is illustrated, which is suitable for treating raw water or water to be treated, wherein the water treatment system comprises a fluid valve, a first water treatment device 20B and a second water treatment device 30B, wherein the first water treatment device 20B comprises at least one first filter element 21B, the second water treatment device comprises at least one second filter element 31B, wherein the first water treatment device 20B has two communication openings, such as a first communication opening 201B and a second communication opening 202B, and the second water treatment device 30B has two communication openings, such as a first communication opening 301B and a second communication opening 302B. Correspondingly, the water inlet of the first filter element 21B of the first water treatment device 20B is communicated with the first communication opening 201B, the water outlet of the first filter element 21B of the first water treatment device 20B is communicated with the second communication opening 202B, the water inlet of the second filter element 31B of the second water treatment device 30B is communicated with the first communication opening 301B, and the water outlet of the second filter element 31B of the second water treatment device 30B is communicated with the second communication opening 302B. It is understood that when the first water treatment device 20B has only a single first filter element 21B, the water inlet of the first filter element 21B can form the first communication opening 201B of the first water treatment device 20B, the water outlet of the first filter element 21B can form the second communication opening 202B of the first water treatment device 20B, when the second water treatment device 30B has only a single second filter element 31B, the water inlet of the second filter element 31B can form the first communication opening 301B of the second water treatment device 30B, and the water outlet of the second filter element 31B can form the second communication opening 302B of the second water treatment device 30B. Thus, the first cartridge 21B of the first water treatment device 20B has at least one water inlet and at least one water outlet, and the second cartridge 31B of the second water treatment device 30B has at least one water inlet and at least one water outlet. Preferably, the first water treatment device 20B of the water treatment system according to the second preferred embodiment of the present invention is configured to perform a primary water treatment or pre-treatment on water, and the second water treatment device 30B is configured to perform a secondary water treatment or re-treatment on water.

It is noted that the type of the water treatment apparatus of the water treatment system of the present invention is not limited herein, for example, the first water treatment apparatus 20B of the water treatment system of the present invention is a water purification apparatus, and the second water treatment apparatus 30B is a water softening apparatus, by way of example. However, in other embodiments, the first water treatment device 20B and the second water treatment device 30B of the water treatment system of the present invention are both water purification devices. In other embodiments, the first water treatment device 20B and the second water treatment device 30B of the water treatment system of the present invention are water softening devices. Accordingly, the first filter element 21B of the water treatment system according to the second preferred embodiment of the present invention may be a pre-filter, an ultra-filter, an activated carbon filter, a softening filter element, or a softening tank containing a softening resin. The second filter element 31B of the water treatment system according to the second preferred embodiment of the present invention may be a pre-filter, an ultra-filtration filter, an activated carbon filter, a softening filter element, or a softening tank containing a softening resin. The water treatment material or device mentioned herein may be a screen, activated carbon, ultrafiltration thread, softened resin, PP wool, RO membrane, etc. according to actual needs.

For better illustration of the present invention, the water treatment system of the present invention will be disclosed and explained in the following description by taking the first water treatment device 20B as a water purification device and the second water treatment device 30B as a water softening device. It should be understood by those skilled in the art that the exemplary embodiments herein implementing the first water treatment device 20B as a purification device and the second water treatment device 30B as a softening device are merely examples and should not be construed as limiting the water treatment system of the present invention.

20-34E of the drawings, the fluid valve 10B of the water treatment system according to the second preferred embodiment of the present invention comprises a valve body 11B and a valve core 1B, wherein the valve body 11B forms an inner cavity 110B, a first opening 1101B, a second opening 1102B, a third opening 1103B, a fourth opening 1104B, a fifth opening 1105B, a sixth opening 1106B and a seventh opening 1107B, wherein the valve core 1B is disposed in the inner cavity 110B, wherein the water treatment system according to the second preferred embodiment of the present invention has a first operating state, a second operating state, a third operating state, a fourth operating state and a fifth operating state, wherein when the water treatment system is in the first operating state, the fluid valve 10B forms a first communication channel 1001B communicating with the sixth opening 1106B and the first opening 1106B of the valve body 11B, respectively, and a first communication channel 1001B, A second communicating passageway 1002B communicating with the second opening 1102B and the third opening 1103B of the valve body 11B, respectively, a third communicating passageway 1003B communicating with the second opening 1102B and the seventh opening 1107B of the valve body 11B, respectively, and a fourth communicating passageway 1004B communicating with the fourth opening 1104B and the fifth opening 1105B of the valve body 11B, respectively; when the water treatment system is in the second operating state, the fluid valve 10B forms a fifth communication channel 1005B in communication with the sixth opening 1106B and the fourth opening 1104B of the valve body 11B, respectively, and a sixth communication channel 1006B in communication with the third opening 1103B and an eighth opening 1108B of the valve body 11B, respectively; when the water treatment system is in the third operating state, the fluid valve 10B forms a seventh communication channel 1007B in communication with the sixth opening 1106B and the second opening 1102B of the valve body 11B, respectively, and an eighth communication channel 1008B in communication with the first opening 1101B and the eighth opening 1108B of the valve body 11B, respectively; when the water treatment system is in the fourth operating state, the fluid valve 10B forms a ninth communication passage 1009B communicating with the sixth opening 1106B and the third opening 1103B of the valve body 11B, respectively, and a tenth communication passage 10010B communicating with the fourth opening 1104B and the eighth opening 1108B of the valve body 11B, respectively; when the water treatment system is in the fifth operating state, the fluid valve 10B forms an eleventh communication channel 10011B in communication with the sixth opening 1106B and the first opening 1101B of the valve body 11B, respectively, and a twelfth communication channel 10012B in communication with the second opening 1102B and the eighth opening 1108B of the valve body 11B, respectively. Preferably, when the water treatment system is in the second operating state, the third operating state, the fourth operating state and the fifth operating state, the water treatment system further forms a thirteenth communicating channel 10013B communicating with the sixth opening 1106B and the fifth opening 1105B of the valve body 11B, respectively, and a fourteenth communicating channel 10014B communicating with the sixth opening 1106B and the seventh opening 1107B of the valve body 11, respectively.

As shown in fig. 20 to 34E of the drawings, the fluid valve 10B of the water treatment system according to the second preferred embodiment of the invention is a planar valve 10B, wherein the planar valve 10B further comprises a movable plate 13B and a fixed plate 12B, wherein the fixed plate 12B has a first fluid control surface 120B, the movable plate 13B has a second fluid control surface 130B, wherein the movable plate 13B and the fixed plate 12B are both disposed in the inner cavity 110B, wherein the second fluid control surface 130B of the movable plate 13B is disposed on the first fluid control surface 120B of the fixed plate 12B, and the movable plate 13B is disposed to be rotatable relative to the fixed plate 12B, wherein the first water treatment device 20B has a first communication opening 201B and a second communication opening 202B, wherein the second water treatment device 30B has a first communication opening 301B and a second communication opening 302B, the inner cavity 110B of the valve body 11B is communicated with the sixth opening 1106B, the first communicating opening 201B of the first water treatment device 20B is communicated with the first opening 1101B of the valve body 11B, the second communicating opening 202B of the first water treatment device 20B is communicated with the second opening 1102B of the valve body 11B, the first communicating opening 301B of the second water treatment device 30B is communicated with the third opening 1103B of the valve body 11B, and the second communicating opening 302B of the second water treatment device 30B is communicated with the fourth opening 1104B of the valve body 11B. Therefore, when the fluid valve 10B is a flat valve, the spool 1B of the fluid valve 10B includes the movable valve plate 13B and the fixed valve plate 12B.

It can be understood by those skilled in the art that the flat valve 10B of the water treatment system of the present invention may further have a connection mechanism, such as a connection screw, a snap joint, etc., disposed on the valve body 11B, so that the flat valve 10B can be connected with other structural components of the water treatment system, such as the first water treatment device 20B, the second water treatment device 30B, etc., to guide the water flow to the respective communication channels formed by the first water treatment device 20B, the second water treatment device 30B and the flat valve 10B.

As shown in fig. 27A to 31 and 32A to 32E of the drawings, the water treatment system according to the second preferred embodiment of the present invention has a first operation state, a second operation state, a third operation state, a fourth operation state and a fifth operation state, when the water treatment system is in the first working state, the movable valve plate 13B and the fixed valve plate 12B of the planar valve 10B form the first communicating channel 1001B respectively communicated with the first opening 1101B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B, the second communicating channel 1002B respectively communicated with the second opening 1102B and the third opening 1103B of the valve body 11B, the third communicating channel 1003B respectively communicated with the second opening 1102B and the seventh opening 1107B of the valve body 11B, and the fourth communicating channel 1004B respectively communicated with the fourth opening 1104B and the fifth opening 1105B of the valve body 11B; when the water treatment system is in the second working state, the movable valve plate 13B and the fixed valve plate 12B of the flat valve 10B form the fifth communication channel 1005B respectively communicated with the fourth opening 1104B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B and the sixth communication channel 1006B respectively communicated with the third opening 1103B and the eighth opening 1108B of the valve body 11B; when the water treatment system is in the third working state, the movable valve plate 13B and the fixed valve plate 12B of the flat valve 10B form the seventh communicating channel 1007B respectively communicated with the second opening 1102B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B and the eighth communicating channel 1008B respectively communicated with the first opening 1101B and the eighth opening 1108B of the valve body 11B; when the water treatment system is in the fourth working state, the movable valve plate 13B and the fixed valve plate 12B of the planar valve 10B form the ninth communication channel 1009B respectively communicated with the third opening 1103B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B and the tenth communication channel 10010B respectively communicated with the fourth opening 1104B and the eighth opening 1108B of the valve body 11B; when the water treatment system is in the fifth operating state, the movable valve plate 13B and the fixed valve plate 12B of the planar valve 10B form the eleventh communication channel 10011B respectively communicated with the first opening 1101B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B and the twelfth communication channel 10012B respectively communicated with the second opening 1102B and the eighth opening 1108B of the valve body 11B. Preferably, when the water treatment system is in the second operating state, the third operating state, the fourth operating state and the fifth operating state, the movable valve plate 13B and the fixed valve plate 12B of the planar valve 10B form the thirteenth communication channel 10013B respectively communicated with the fifth opening 1105B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B and the fourteenth communication channel 10014B respectively communicated with the seventh opening 1107B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B.

As shown in fig. 27A to 27E, 32A and 34A of the drawings, when the water treatment system according to the second preferred embodiment of the present invention is in the first operating state, the first communication channel 1001B formed by the flat valve 10B communicates with the first opening 1101B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B, respectively, the second communication channel 1002B communicates with the second opening 1102B and the third opening 1103B of the valve body 11B, respectively, the third communication channel 1003B communicates with the second opening 1102B and the seventh opening 1107B of the valve body 11B, respectively, and the fourth communication channel 1004B communicates with the fourth opening 1104B and the fifth opening 1003B of the valve body 11B, respectively, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, and then pass through the first communication channel 1001B of the flat valve 10B, The first opening 1101B of the valve body 11B and the first communication opening 201B of the first water treatment device 20B flow into the first water treatment device 20B, raw water is purified (or treated) by the first water treatment device 20B and then flows out from the second communication opening 202B of the first water treatment device 20B, purified water continues to flow into the flat valve 10B through the second opening 1102B of the valve body 11B, and then purified water is divided into two paths, wherein one path of purified water flows into the second water treatment device 30B through the second communication passage 1002B of the flat valve 10B, the third opening 1103B of the valve body 11B and the first communication opening 301B of the second water treatment device 30B, and after being softened (or treated) by the second water treatment device 30B, sequentially flows through the second communication opening 302B of the second water treatment device 30B, the fourth opening 1104B of the valve body 11B, and the fourth communication opening 302B of the valve body 11B, The fourth communicating passage 1004B of the flat valve 10B and the fifth opening 1105B of the valve body 11B flow out and supply the water treated by the first water treatment apparatus 20B and the second water treatment apparatus 30B to the user, wherein the other path of purified water flows out through the third communicating passage 1003B of the flat valve 10 and the seventh opening 1107B of the valve body 11B and supplies the water treated by the first water treatment apparatus 20B to the user. Accordingly, the first operating state of the water treatment system corresponds to a water treatment operating state of the water treatment system. Therefore, when the water treatment system is in the first operating state, the sixth opening 1106B of the valve body 11B (or the inner cavity 110B of the valve body 11B), the first opening 1101B of the valve body 11B, the first communication opening 201B of the first water treatment device 20B, the second communication opening 202B of the first water treatment device 20B, the second opening 1102B of the valve body 11B, the third opening 1103B of the valve body 11B, the first communication opening 301B of the second water treatment device 30B, the second communication opening 302B of the second water treatment device 30B, the fourth opening 1104B of the valve body 11B, and the fifth opening 1105B of the valve body 11B are sequentially communicated, so as to form a water flow path connecting the first water treatment device 20B and the second water treatment device 30B in series, so that raw water can flow from the first water treatment device 20B to the second water treatment device 30B and the raw water can be sequentially treated by the first water treatment device 30B and the second water treatment device 30B The device 20B and the second water treatment device 30B. Accordingly, when the water treatment system is in the first working state, the sixth opening 1106B of the valve body 11 (or the inner cavity 110B of the valve body 11B), the first opening 1101B of the valve body 11B, the first communication opening 201B of the first water treatment device 20B, the second communication opening 202B of the first water treatment device 20B, the second opening 1102B of the valve body 11B and the seventh opening 1107B of the valve body 11B are communicated in sequence, so as to form a purified water path. The direction of the arrows in fig. 32A indicate the direction of water flow.

As shown in fig. 28, 32B and 34B of the drawings, when the water treatment system according to the second preferred embodiment of the present invention is in the second operation state, the fifth communication channel 1005B formed by the flat valve 10B is respectively communicated with the fourth opening 1104B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B, and the sixth communication channel 1006B is respectively communicated with the third opening 1103B and the eighth opening 1108B of the valve body 11B, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, then to flow into the fourth opening 1104B of the valve body 11B through the fifth communication channel 1005B formed by the valve body 11, then to flow into the second water treatment device 30B through the second communication opening 302B of the second water treatment device 30B, and treat the water in the second water treatment device 30B, such as softened resin, etc., and the resultant sewage or wastewater flows out from the first communication opening 301B of the second water treatment device 30B after reverse flushing, then flows through the third opening 1103B of the valve body 11B into the sixth communication passage 1006B of the flat valve 10B, and then flows out from the eighth opening 1108B of the valve body 11B. In other words, the water treatment system of the present invention can control the back flushing of the second water treatment device 30B when the water treatment system is in the second operation state. Accordingly, in the second operating state of the water treatment system, the plane valve 10B of the water treatment system controls the water flow to perform the back flushing on the second filter element 31B of the second water treatment device 30B, and therefore, the second operating state of the water treatment system corresponds to the second filter element back flushing operating state of the water treatment system. Therefore, when the water treatment system is in the second operating state, the sixth opening 1106B of the valve body 11B (or the inner cavity 110B of the valve body 11B), the fourth opening 1104B of the valve body 11B, the second through opening 302B of the second water treatment device 30B, the first through opening 301B of the second water treatment device 30B, the third opening 1103B of the valve body 11B and the eighth opening 1108B of the valve body 11B are sequentially communicated, so as to form a water flow path, so that raw water can flow through the second water treatment device 30B and reversely flush the second water treatment device 30B by the raw water, and the obtained sewage or wastewater flows out from the eighth opening 1108B of the valve body 11B. The direction of the arrows in fig. 32B indicate the direction of water flow.

Preferably, the thirteenth communication channel 10013B formed by the flat valve 10B is respectively communicated with the fifth opening 1105B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B, the fourteenth communication channel 10014B formed by the flat valve 10B is respectively communicated with the seventh opening 1107B and the sixth opening 1106B of the valve body 11B, thereby allowing raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, then the thirteenth communication channel 10013B formed by the flat valve 10B flows through the fifth opening 1105B of the valve body 11B and supplies raw water to a user, and the fourteenth communication channel 10014B formed by the flat valve 10B flows through the seventh opening 1107B of the valve body 11B and supplies raw water to a user. That is, when the water treatment system is in the second working state, the water treatment system can continuously supply raw water to a user so as to avoid water supply interruption. In other words, when the water treatment system of the present invention performs the back flushing of the second water treatment device 30B, the water treatment system can still continuously provide the raw water to the user to avoid the interruption of the water supply.

As shown in fig. 29, 32C and 34C of the drawings, when the water treatment system according to the second preferred embodiment of the present invention is in the third operation state, the seventh communication channel 1007B formed by the flat valve 10B is respectively communicated with the second opening 1102B and the sixth opening 1106B (or the inner chamber 110B) of the valve body 11B, the eighth communication channel 1008B is respectively communicated with the first opening 1101B and the eighth opening 1108B of the valve body 11B, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner chamber 110B of the valve body 11B, then to flow into the second opening 1102B of the valve body 11B through the seventh communication channel 1007B formed by the flat valve 10B, to flow into the first water treatment device 20B through the second communication opening 202B of the first water treatment device 20B, and to reverse flush the first water treatment device 20B, the resulting sewage or wastewater flows out of the first communication opening 201B of the first water treatment device 20B, then flows through the first opening 1101B of the valve body 11B into the eighth communication passage 1008B of the flat valve 10B, and then flows out of the eighth opening 1108B of the valve body 11B. In other words, when the water treatment system is in the third operating state, the water treatment system of the present invention can control the back flushing of the first water treatment device 20B. Accordingly, in the third operating state of the water treatment system, the flat valve 10B of the water treatment system controls the water flow to back flush the first filter element 21B of the first water treatment device 20B, and thus the third operating state of the water treatment system corresponds to the first filter element back flushing operating state of the water treatment system. Therefore, when the water treatment system is in the third operating state, the sixth opening 1106B (or the inner chamber 110B) of the valve body 11B, the second opening 1102B of the valve body 11B, the second communication opening 202B of the first water treatment device 20B, the first communication opening 201B of the first water treatment device 20B, the first opening 1101B of the valve body 11B and the eighth opening 1108B of the valve body 11B are communicated in sequence, so that a water flow passage is formed, so that raw water can flow through the first water treatment device 20B and the first water treatment device 20B is back-flushed by the raw water, and the obtained sewage or wastewater flows out from the eighth opening 1108B of the valve body 11B. The direction of the arrows in fig. 32C indicate the direction of water flow.

Preferably, the thirteenth communication channel 10013B formed by the flat valve 10B is respectively communicated with the fifth opening 1105B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B, the fourteenth communication channel 10014B formed by the flat valve 10B is respectively communicated with the seventh opening 1107B and the sixth opening 1106B of the valve body 11B, thereby allowing raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, then the thirteenth communication channel 10013B formed by the flat valve 10B flows through the fifth opening 1105B of the valve body 11B and supplies raw water to a user, and the fourteenth communication channel 10014B formed by the flat valve 10B flows through the seventh opening 1107B of the valve body 11B and supplies raw water to a user. That is, when the water treatment system is in the third operating state, the water treatment system can continuously supply raw water to a user to avoid water supply interruption. In other words, when the water treatment system of the present invention performs the back flushing of the first water treatment device 20B, the water treatment system can still continuously provide the raw water to the user to avoid the interruption of the water supply.

As shown in fig. 30, 32D and 34D of the drawings, when the water treatment system according to the second preferred embodiment of the present invention is in the fourth operating state, the ninth communication channel 1009B formed by the flat valve 10B is respectively communicated with the third opening 1103B and the sixth opening 1106B of the valve body 11B, the tenth communication channel 10010B formed by the flat valve 10B is respectively communicated with the fourth opening 1104B and the eighth opening 1108B of the valve body 11B, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, then flow into the third opening 1103B of the valve body 11B through the ninth communication channel 1009B formed by the flat valve 10B, flow into the second water treatment device 30B through the first communication opening 301B of the second water treatment device 30B, and perform forward flushing on the second water treatment device 30B, the resulting sewage or wastewater flows out of the second communication opening 302B of the second water treatment device 30B, then flows through the fourth opening 1104B of the valve body 11B into the tenth communication channel 10010B of the flat valve 10B, and then flows out of the eighth opening 1108B of the valve body 11B. In other words, when the water treatment system is in the fourth operating state, the water treatment system of the present invention can control the forward flushing of the second water treatment device 30B. Accordingly, in the fourth operating state of the water treatment system, the flat valve 10B of the water treatment system controls the flow of water to positively flush the second filter element 31B of the second water treatment device 30B, and thus the fourth operating state of the water treatment system corresponds to the second filter element positive flushing operating state of the water treatment system. Therefore, when the water treatment system is in the fourth operating state, the sixth opening 1106B of the valve body 11B (or the inner cavity 110B of the valve body 11B), the third opening 1103B of the valve body 11B, the first through opening 301B of the second water treatment device 30B, the second through opening 302B of the second water treatment device 30B, the fourth opening 1104B of the valve body 11B and the eighth opening 1108B of the valve body 11B are sequentially communicated, so as to form a water flow path, so that raw water can flow through the second water treatment device 30B and the second water treatment device 30B is being flushed by the raw water, and the obtained sewage or wastewater flows out from the eighth opening 1108B of the valve body 11B. The direction of the arrows in fig. 32D indicate the direction of water flow.

Preferably, the thirteenth communication channel 10013B formed by the flat valve 10B is respectively communicated with the fifth opening 1105B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B, the fourteenth communication channel 10014B formed by the flat valve 10B is respectively communicated with the seventh opening 1107B and the sixth opening 1106B of the valve body 11B, thereby allowing raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, then the thirteenth communication channel 10013B formed by the flat valve 10B flows through the fifth opening 1105B of the valve body 11B and supplies raw water to the user, and the fourteenth communication channel 10014B formed by the flat valve 10B flows through the seventh opening 1107B of the valve body 11B and supplies raw water to the user. That is, when the water treatment system is in the fourth operating state, the water treatment system can continuously supply raw water to a user to avoid water supply interruption. In other words, when the water treatment system of the present invention performs the forward flushing of the second water treatment device 30B, the water treatment system can still continuously provide the raw water to the user to avoid the interruption of the water supply.

As shown in fig. 31, 32E and 34E of the drawings, when the water treatment system according to the second preferred embodiment of the present invention is in the fifth working state, the eleventh communication channel 10011B formed by the flat valve 10B is respectively communicated with the first opening 1101B and the sixth opening 1106B (or the inner cavity 110B) of the valve body 11B, the twelfth communication channel 10012B formed by the flat valve 10B is respectively communicated with the second opening 1102B and the eighth opening 1108B of the valve body 11B, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, then flow into the first opening 1101B of the valve body 11B through the eleventh communication channel 10011B formed by the flat valve 10B, and then flow into the first water treatment device 20B through the first communication opening 201B of the first water treatment device 20B, and the sewage or wastewater obtained after the forward flushing of the first water treatment device 20B flows out from the second communication opening 202B of the first water treatment device 20B, then flows through the second opening 1102B of the valve body 11B into the twelfth communication passage 10012B of the flat valve 10B, and then flows out from the eighth opening 1108B of the valve body 11B. In other words, when the water treatment system is in the fifth operating state, the water treatment system of the present invention can control the forward flushing of the first water treatment device 20B. Accordingly, in the fifth operating state of the water treatment system, the flat valve 10B of the water treatment system controls the water flow to perform the forward flushing of the first filter element 21B of the first water treatment device 20B, and therefore, the fifth operating state of the water treatment system corresponds to the first filter element forward flushing operating state of the water treatment system. Therefore, when the water treatment system is in the fifth operating state, the sixth opening 1106B of the valve body 11B (or the inner cavity 110B of the valve body 11B), the first opening 1101B of the valve body 11B, the first communication opening 201B of the first water treatment device 20B, the second communication opening 202B of the first water treatment device 20B, the second opening 1102B of the valve body 11B and the eighth opening 1108B of the valve body 11B are sequentially communicated, so that a water flow passage is formed, so that raw water can flow through the first water treatment device 20B and the first water treatment device 20B is being flushed by the raw water, and the obtained sewage or wastewater flows out from the eighth opening 1108B of the valve body 11B. The direction of the arrows in fig. 32E indicate the direction of water flow.

Preferably, the thirteenth communication channel 10013B formed by the flat valve 10B communicates with the fifth opening 1105B and the sixth opening 1106B (the inner cavity 110B) of the valve body 11B, respectively, the fourteenth communication channel 10014B formed by the flat valve 10B communicates with the seventh opening 1107B and the sixth opening 1106B (the inner cavity 110B) of the valve body 11B, respectively, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, and then raw water flows out and is supplied to the user through the fifth opening 1105B of the valve body 11B via the thirteenth communication channel 10013B formed by the flat valve 10B, and raw water flows out and is supplied to the user via the seventh opening 1107B of the valve body 11B via the fourteenth communication channel 10014B formed by the flat valve 10B. That is, when the water treatment system is in the fifth operating state, the water treatment system can continuously supply raw water to a user to avoid water supply interruption. In other words, when the water treatment system of the present invention performs the forward flushing of the first water treatment device 20B, the water treatment system can still continuously provide the raw water to the user to avoid the interruption of the water supply.

Accordingly, as shown in fig. 27A to 31 and 32A to 32E of the drawings, the fluid valve (or planar valve) 10B of the water treatment system according to the second preferred embodiment of the present invention has a first operating position, a second operating position, a third operating position, a fourth operating position and a fifth operating position, wherein when the fluid valve (or planar valve) 10B is in the first operating position, the valve core 1B of the fluid valve 10B forms the first communicating channel 1001B, the second communicating channel 1002B, the third communicating channel 1003B and the fourth communicating channel 1004B; when the fluid valve (or planar valve) 10B is in the second operating position, the spool 1B of the fluid valve 10B forms the fifth communication passage 1005B and the sixth communication passage 1006B; when the fluid valve (or planar valve) 10B is in the third operating position, the spool 1B of the fluid valve 10B forms the seventh communication passage 1007B and the eighth communication passage 1008B; when the fluid valve (or planar valve) 10B is in the fourth operating position, the spool 1B of the fluid valve 10B forms the ninth communication passage 1009B and the tenth communication passage 10010B; when the fluid valve (or planar valve) 10B is in the fifth operating position, the spool 1B of the fluid valve 10B forms the eleventh communication passage 10011B and the twelfth communication passage 10012B. More preferably, when the fluid valve (or planar valve) 10B is in the second operating position, the third operating position, the fourth operating position and the fifth operating position, the spool 1B of the fluid valve 10B further forms the thirteenth communication passage 10013B and the fourteenth communication passage 10014B. It will be appreciated that the first operating position of the fluid valve (or planar valve) 10B of the water treatment system corresponds to the water treatment operating position of the fluid valve 10B, the second operating position corresponds to the second cartridge backwash operating position of the fluid valve 10B, the third operating position corresponds to the first cartridge backwash operating position of the fluid valve 10B, the fourth operating position corresponds to the second cartridge forward wash operating position of the fluid valve 10B and the fifth operating position corresponds to the first cartridge forward wash operating position of the fluid valve 10B.

As shown in fig. 20 to 34E of the drawings, the flat valve 10B of the water treatment system according to the second preferred embodiment of the present invention has a first channel 101B, a second channel 102B, a third channel 103B, a fourth channel 104B, a fifth channel 105B, a sixth channel 106B, a seventh channel 107B, an eighth channel 108B, a ninth channel 109B, a tenth channel 1010B and an eleventh channel 1011B, wherein the first channel 101B, the second channel 102B, the third channel 103B, the fourth channel 104B, the fifth channel 105B, the tenth channel 1010B and the eleventh channel 1011B are respectively disposed on the fixed plate 12B and respectively extend from the first fluid control surface 120B of the fixed plate 12B; the sixth channel 106B, the seventh channel 107B, the eighth channel 108B and the ninth channel 109B are respectively disposed on the movable valve plate 13B and respectively extend from the second fluid control surface 130B of the movable valve plate 13B, the first channel 101B is communicated with the first opening 1101B, the second channel 102B is communicated with the second opening 1102B, the third channel 103B is communicated with the third opening 1103B, the fourth channel 104B is communicated with the fourth opening 1104B, the fifth channel 105B is communicated with the fifth opening 1105B, the tenth channel 1010B is communicated with the seventh opening 1107B, the eleventh channel 1011B is communicated with the eighth opening 1108, the sixth channel 106B is communicated with the inner cavity 110B of the valve body 11B, and the ninth channel 109B is communicated with the eleventh channel 1011B. In addition, in order to ensure that the water in the inner cavity 110B of the valve body 11B enters the sixth passage 106B, the sixth passage 106B is provided to be always in communication with the inner cavity 110B of the valve body 11B through an inlet port 1061B which is always in communication with the outside space.

As shown in fig. 33A to 34E of the drawings, the movable valve plate 13B of the flat valve 10B of the water treatment system according to the second preferred embodiment of the present invention can rotate relative to the fixed valve plate 12B, so that the flat valve 10B has the first working position, the second working position, the third working position, the fourth working position and the fifth working position, wherein when the flat valve 10B is in the first working position, the sixth channel 106B of the flat valve 10B is communicated with the first channel 101B, the seventh channel 107B is communicated with the second channel 102B and the third channel 103B, the seventh channel 107B is communicated with the second channel 102B and the tenth channel 1010B, respectively, the eighth channel 108B is communicated with the fourth channel 104B and the fifth channel 105B, respectively, in other words, when the flat valve 10B is in the first working position, the seventh channel 107B is respectively communicated with the second channel 102B, the third channel 103B and the tenth channel 1010B; when the flat valve 10B is in the second working position, the sixth channel 106B is communicated with the fourth channel 104B, and the ninth channel 109B is communicated with the third channel 103B and the eleventh channel 1011B, respectively; when the flat valve 10B is in the third operating position, the sixth channel 106B communicates with the second channel 102B, and the ninth channel 109B communicates with the first channel 101B and the eleventh channel 1011B, respectively; when the flat valve 10B is in the fourth working position, the sixth channel 106B communicates with the third channel 103B, and the ninth channel 109B communicates with the fourth channel 104B and the eleventh channel 1011B, respectively; when the flat valve 10B is in the fifth operating position, the sixth channel 106B communicates with the first channel 101B, and the ninth channel 109B communicates with the second channel 102B and the eleventh channel 1011B, respectively. Preferably, when the planar valve 10B is in the second operating position, the third operating position, the fourth operating position and the fifth operating position, the fifth passage 105B is communicated with the inner cavity 110B (or the sixth opening 1106B) of the valve body 11B, and the tenth passage 1010B is communicated with the inner cavity 110B (or the sixth opening 1106B) of the valve body 11B.

As shown in fig. 33A to 34E of the drawings, more preferably, when the planar valve 10B is in the first working position, the ninth channel 109B and the eleventh channel 1011B of the planar valve 10B are communicated; when the flat valve 10B is in the second working position, the seventh passage 107B of the flat valve 10B is communicated with the first passage 101B, and the eighth passage 108B is communicated with the second passage 102B; when the flat valve 10B is in the third working position, the seventh passage 107B communicates with the fourth passage 104B, and the eighth passage 108B communicates with the third passage 103B; when the flat valve 10B is in the fourth operating position, the seventh passage 107B communicates with the second passage 102B, and the eighth passage 108B communicates with the first passage 101B; when the flat valve 10B is in the fifth operating position, the seventh passage 107B communicates with the third passage 103B, and the eighth passage 108B communicates with the fourth passage 104B.

It can be understood that when the flat valve 10B is in the first working position, the water treatment system according to the second preferred embodiment of the present invention is controlled to be in the water treatment working state, the sixth passage 106B of the flat valve 10B communicates with the first passage 101B to form the first communicating passage 1001B, the seventh passage 107B communicates with the second passage 102B and the third passage 103B to form the second communicating passage 1002B, the seventh passage 107B communicates with the second passage 102B and the tenth passage 1010B to form the third communicating passage 1003B, and the eighth passage 108B communicates with the fourth passage 104B and the fifth passage 105B to form the fourth communicating passage 1004B; when the flat valve 10B is at the second working position, the water treatment system according to the second preferred embodiment of the present invention is controlled to be in the second filter core backwashing working state, the sixth channel 106B of the flat valve 10B is communicated with the fourth channel 104B to form the fifth communicating channel 1005B, and the ninth channel 109B is communicated with the third channel 103B and the eleventh channel 1011B, respectively, to form the sixth communicating channel 1006B; when the flat valve 10B is at the third operating position, the water treatment system according to the second preferred embodiment of the present invention is controlled to be in the first filter core backwashing operating state, the sixth channel 106B of the flat valve 10B is communicated with the second channel 102B to form the seventh communicating channel 1007B, and the ninth channel 109B is communicated with the first channel 101B and the eleventh channel 1011B, respectively, to form the eighth communicating channel 1008B; when the flat valve 10B is in the fourth working position, the water treatment system according to the second preferred embodiment of the present invention is controlled to be in the second filter element forward washing working state, the sixth channel 106B of the flat valve 10B is communicated with the third channel 103B to form the ninth communicating channel 1009B, and the ninth channel 109B is respectively communicated with the fourth channel 104B and the eleventh channel 1011B to form the tenth communicating channel 10010B; when the planar valve 10B is in the fifth operating position, the water treatment system according to the second preferred embodiment of the present invention is controlled to be in the first filter core forward washing operating state, the sixth channel 106B of the planar valve 10B is communicated with the first channel 101B to form the eleventh communicating channel 10011B, and the ninth channel 109B is respectively communicated with the second channel 102B and the eleventh channel 1011B to form the twelfth communicating channel 10012B. Further, when the planar valve 10B is respectively located at the second working position, the third working position, the fourth working position and the fifth working position, the water treatment system according to the second preferred embodiment of the present invention is respectively located at the second filter element backwashing working state, the first filter element backwashing working state, the second filter element forward washing working state and the first filter element forward washing working state, the fifth channel 105B of the planar valve 10B is communicated with the sixth opening 1106B (or the inner cavity 110B of the valve body 11B) to form the thirteenth communication channel 10013B, and the tenth channel 1010B of the planar valve 10B is communicated with the sixth opening 1106B (or the inner cavity 110B of the valve body 11) to form the fourteenth communication channel 10014B.

As shown in fig. 27A to 27E, 32A and 34A of the drawings, when the planar valve 10B is at the first working position, the water treatment system is in the water treatment working state, raw water flows into the inner cavity 110B of the valve body 11B from the sixth opening 1106B of the valve body 11B, then flows into the first passage 101B of the fixed valve plate 12B through the sixth passage 106B of the movable valve plate 13B, then flows into the first communication opening 201B of the first water treatment device 20B through the first opening 1101B of the valve body 11B, and after being treated by the water treatment material or device of the first water treatment device 20B, flows out from the second communication opening 202B of the first water treatment device 20B, purified water flows into the planar valve 10B sequentially through the second opening 1102B of the valve body 11B, the second passage 102B of the fixed valve plate 12B and the seventh communication passage 107B of the movable valve plate 13B, then the purified water is divided into two paths, wherein one path of purified water flows to the third channel 103B of the fixed valve plate 12B, the third opening 1103B of the valve body 11B and the first conducting opening 301B of the second water treatment device 30B to enter the second water treatment device 30B, and flows out from the second conducting opening 302B of the second water treatment device 30B after being treated by the water treatment material or device of the second water treatment device 30B, then enters the fourth channel 104B of the fixed valve plate 12B through the fourth opening 1104B of the valve body 11B, flows out through the eighth channel 108B of the movable valve plate 13B, the fifth channel 105B of the fixed valve plate 12B and the fifth opening 1105B of the valve body 11B, and supplies the treated water to the user, wherein the other path of purified water flows to the tenth channel 1010B of the fixed valve plate 12B, flows out from the seventh opening 1107B of the valve body 11B and supplies purified water to the user; as shown in fig. 28, 32B and 34B of the drawings, when the flat valve 10B is at the second working position, the water treatment system is in the second filter core backwashing working state, raw water flows into the inner cavity 110B of the valve body 11B from the sixth opening 1106B of the valve body 11B, then flows into the fourth passage 104B of the fixed valve plate 12B through the sixth passage 106B of the movable valve plate 13B, then flows into the second conducting opening 302B of the second water treatment device 30B through the fourth opening 1104B of the valve body 11B, flows out of the first conducting opening 301B of the second water treatment device 30B after reverse flushing of the second water treatment device 30B, then flows through the third opening 1103B of the valve body 11B, then flows through the third passage 103B of the fixed valve plate 12B, the ninth passage 109B of the movable valve plate 13B and the eleventh passage 1011B of the fixed valve plate 12B, and out the eighth opening 1108B of the flat valve 10B; as shown in fig. 29, 32C and 34C of the drawings, when the flat valve 10B is at the third working position, the water treatment system is in the first filter core backwashing working state, raw water flows into the inner cavity 110B of the valve body 11B from the sixth opening 1106B of the valve body 11B, then flows into the second passage 102B of the fixed valve plate 12B through the sixth passage 106B of the movable valve plate 13B, then flows into the second communication opening 202B of the first water treatment device 20B through the second opening 1102B of the valve body 11B, flows out of the first communication opening 201B of the first water treatment device 20B after the first water treatment device 20B is backwashed, and then flows through the first opening B of the valve body 11B, the first passage 101B of the fixed valve plate 12B, the ninth passage 109B of the movable valve plate 13B and the eleventh passage 1011B of the fixed valve plate 12B, and out the eighth opening 1108B of the flat valve 10B; as shown in fig. 30, 32D and 34D of the accompanying drawings, when the planar valve 10B is at the fourth working position, the water treatment system is in the second filter core forward washing working state, raw water flows into the inner cavity 110B of the valve body 11B from the sixth opening 1106B of the valve body 11B, then flows into the third passage 103B of the fixed valve plate 12B through the sixth passage 106B of the movable valve plate 13B, then flows into the first conducting opening 301B of the second water treatment device 30B through the third opening 1103B of the valve body 11B, flows out of the second conducting opening 302B of the second water treatment device 30B after forward washing of the second water treatment device 30B, and then flows through the fourth opening 1104 of the valve body 11B, the fourth passage 104B of the fixed valve plate 12B, the ninth passage 109B of the movable valve plate 13B and the eleventh passage 1011B of the fixed valve plate 12B, and out the eighth opening 1108B of the flat valve 10B; as shown in fig. 31, 32E and 34E of the drawings, when the planar valve 10B is at the fifth operating position, the water treatment system is in the first filter core forward washing operating state, raw water flows into the inner cavity 110B of the valve body 11B from the sixth opening 1106B of the valve body 11B, then flows into the first passage 101B of the fixed valve plate 12B through the sixth passage 106B of the movable valve plate 13B, then flows into the first communication opening 201B of the first water treatment device 20B through the first opening 1101B of the valve body 11B, performs forward washing on the first water treatment device 20B, flows out from the second communication opening 202B of the first water treatment device 20B, then flows through the second opening 1102B of the valve body 11B, the second passage 102B of the fixed valve plate 12B, the ninth passage 109B of the movable valve plate 13B and the eleventh passage 1011B of the fixed valve plate 12B, and out the eighth opening 1108B of the flat valve 10B.

It is noted that the first channel 101B, the second channel 102B, the third channel 103B, the fourth channel 104B, the fifth channel 105B, the tenth channel 1010B and the eleventh channel 1011B of the flat valve 10B are separately disposed on the first fluid control surface 120B of the fixed valve plate 12B; the sixth channel 106B, the seventh channel 107B, the eighth channel 108B and the ninth channel 109B are separately disposed on the second fluid control surface 130B of the movable valve plate 13B. In other words, the first duct 101B, the second duct 102B, the third duct 103B, the fourth duct 104B, the fifth duct 105B, the tenth duct 1010B and the eleventh duct 1011B of the flat valve 10B each form a duct opening of the first fluid control surface 120B provided at the fixed valve plate 12B, the sixth duct 106B, the seventh duct 107B, the eighth duct 108B and the ninth duct 109B each form a duct opening of the second fluid control surface 130B provided at the movable valve plate 13B, when the movable valve plate 13B and the fixed valve plate 12B of the flat valve 10B are disposed opposite (the first fluid control surface 120B) to the face (the second fluid control surface 130B), and the movable valve plate 13B rotates relative to the fixed valve plate 12B, the duct provided at the movable valve plate 13B and the duct provided at the fixed valve plate 12B selectively communicate with each other through the respective duct openings, thereby forming corresponding communication channels and controlling the flow direction of the fluid (e.g., water flow).

It is understood that the first channel 101B, the second channel 102B, the third channel 103B, the fourth channel 104B, the fifth channel 105B, the sixth channel 106B, the seventh channel 107B, the eighth channel 108B, the ninth channel 109B, the tenth channel 1010B, and the eleventh channel 1011B of the planar valve 10B may have any extended path (or direction) that enables communication herein; the first channel 101B, the second channel 102B, the third channel 103B, the fourth channel 104B, the fifth channel 105B, the tenth channel 1010B and the eleventh channel 1011B of the flat valve 10B respectively form a channel opening of the first fluid control surface 120B of the fixed valve plate 12B, and the sixth channel 106B, the seventh channel 107B, the eighth channel 108B and the ninth channel 109B respectively form a channel opening of the second fluid control surface 130B of the movable valve plate 13B, which can have any shape capable of achieving the mutual communication relationship therein. For example, the second channel 102B can be formed on the first fluid control surface 120B of the stationary plate 12B with a channel opening having a regular shape or an irregular shape. Therefore, the extending paths (or directions) of the first channel 101B, the second channel 102B, the third channel 103B, the fourth channel 104B, the fifth channel 105B, the sixth channel 106B, the seventh channel 107B, the eighth channel 108B, the ninth channel 109B, the tenth channel 1010B, and the eleventh channel 1011B of the planar valve 10B and the shapes of the channel openings thereof should not be construed as limitations of the present invention.

33A-33D of the drawings, the fixed valve plate 12B of the planar valve 10B of the water treatment system according to the second preferred embodiment of the present invention has a first central portion 121B, a first extending portion 122B extending outwardly from the first central portion 121B, and a first edge portion 123B extending outwardly from the first extending portion 122B, the movable valve plate 13B has a second central portion 131B, a second extending portion 132B extending outwardly from the second central portion 131B, and a second edge portion 133B extending outwardly from the second extending portion 132B, wherein the first fluid 120B of the fixed valve plate 12B has a central portion 1200B indicated by a dashed line in the drawings, wherein the central portion 1200B is disposed on the first central portion 121B of the fixed valve plate 12B, and a portion of the first fluid control surface 120B outside the central portion 1200B is equally divided by a first portion 1201B indicated by a dashed line in a clockwise direction, A second portion 1202B, a third portion 1203B, a fourth portion 1204B, a fifth portion 1205B, a sixth portion 1206B, a seventh portion 1207B, and an eighth portion 1208B; the second fluid control surface 130B of the movable valve plate 13B of the flat valve 10B has a central area 1300B shown by a chain line in the figure, wherein the central area 1300B is disposed at the second central portion 131B of the movable valve plate 13B, and the part of the second fluid control surface 130B outside the central area 1300B is divided clockwise equally into a first area 1301B, a second area 1302B, a third area 1303B, a fourth area 1304B, a fifth area 1305B, a sixth area 1306B, a seventh area 1307B and an eighth area 1308B shown by dotted lines; wherein the first channel 101B extends downward from the first portion 1201B and the second portion 1202B of the first fluid control surface 120B, and the first channel 101B is a through hole; the fourth channel 104B extends downward from the third portion 1203B and the fourth portion 1204B of the first fluidic control surface 120B, and the fourth channel 104B is a through hole; the fifth channel 105B extends downward from the third portion 1203B of the first fluid control surface 120B, and the fifth channel 105B is a through hole; the second channel 102B extends downward from the sixth portion 1206B of the first fluid control surface 120B, and the second channel 102B is a through hole; the third channel 103B extends downward from the seventh portion 1207B and the eighth portion 1208B of the first fluid control surface 120B, and the third channel 103B is a through hole; the tenth channel 1010B extends downward from the seventh portion 1207B of the first fluid control surface 120B, and the tenth channel 1010B is a through hole; the eleventh channel 1011B extends downwardly from the central portion 1200B of the first fluid control surface 120B, and the eleventh channel 1011B is a through hole; the sixth channel 106B extends upward from the first region 1301B of the second flow control surface 130B; the eighth channel 108B extends upward from the third area 1303B of the second fluid control surface 130B, and the eighth channel 108B is a blind hole or a guiding groove; the ninth channel 109B extends from the central region 1300B to the fifth region 1305B of the second fluid control surface 130B, and the ninth channel 109B is a blind hole or a channel; the seventh channel 107B extends upward from the sixth region 1306B and the seventh region 1307B of the second fluid control surface 130B, and the seventh channel 107B is a blind hole or a channel.

It can be understood that, when the second fluid control surface 130B of the movable valve plate 13B is disposed on the first fluid control surface 120B of the fixed valve plate 12B, the second central portion 131B of the second fluid control surface 130B of the movable valve plate 13B faces the first central portion 121B of the first fluid control surface 120B of the fixed valve plate 12B, the second extending portion 132B of the second fluid control surface 130B of the movable valve plate 13B faces the first extending portion 122B of the first fluid control surface 120B of the fixed valve plate 12B, and the second edge portion 133B of the second fluid control surface 130B of the movable valve plate 13B faces the first edge portion 123B of the first fluid control surface 120B of the fixed valve plate 12B.

As shown in fig. 26A to 26F and fig. 33A to 33D of the drawings, the first channel 101B, the fourth channel 104B, the second channel 102B and the third channel 103B of the planar valve 10B of the water treatment system according to the second preferred embodiment of the invention are arranged on the fixed valve plate 12B clockwise in this order, the fifth channel 105B is located outside the fourth channel 104B, the tenth channel 1010B is located outside the third channel 103B, and the eleventh channel 1011B is located in the central portion 1200B of the fixed valve plate 12B; the sixth passage 106B, the eighth passage 108B, the ninth passage 109B, and the seventh passage 107B of the flat valve 10B are arranged clockwise in this order on the movable valve plate 13B. Optionally, the first channel 101B, the fourth channel 104B, the second channel 102B and the third channel 103B of the flat valve 10B are arranged on the fixed valve plate 12B counterclockwise in this order; the sixth passage 106B, the eighth passage 108B, the ninth passage 109B, and the seventh passage 107B of the flat valve 10B are arranged counterclockwise in this order on the movable valve plate 13B.

Optionally, the first fluid control surface 120B of the fixed valve plate 12B of the planar valve 10B and the second fluid control surface 130B of the movable valve plate 13B are both circular, the first channel 101B, the second channel 102B, the third channel 103B, the fourth channel 104B, the fifth channel 105B, and the tenth channel 1010B are all radially disposed on the first fluid control surface 120B of the fixed valve plate 12B, and the sixth channel 106B, the seventh channel 107B, the eighth channel 108B, and the ninth channel 109B are radially disposed on the second fluid control surface 130B of the movable valve plate 13B.

Preferably, the first channel 101B, the second channel 102B, the third channel 103B and the fourth channel 104B of the flat valve 10B are respectively disposed at the first extending portion 122B of the first fluid control surface 120B of the fixed valve plate 12B, the fifth channel 105B and the tenth channel 1010B are disposed at the first edge portion 123B of the first fluid control surface 120B of the fixed valve plate 12B, and the eleventh channel 1010B is disposed at the first center portion 121B of the first fluid control surface 120B of the fixed valve plate 12B. Correspondingly, the sixth channel 106B and the seventh channel 107B are respectively disposed at the second extending portion 132B of the second fluid control surface 130B of the movable valve plate 13B, the seventh channel and the eighth channel 108B are disposed to extend from the second extending portion 132B of the second fluid control surface 130B of the movable valve plate 13B to the second edge portion 133B, and the ninth channel 109B is disposed to extend from the second center portion 131B of the second fluid control surface 130B of the movable valve plate 13B to the second extending portion 132B.

Preferably, the first channel 101B of the flat valve 10B extends downward and outward from the first fluid control surface 120B of the fixed valve plate 12B, the second channel 102B extends downward and outward from the first fluid control surface 120B of the fixed valve plate 12B, the third channel 103B extends downward and outward from the first fluid control surface 120B of the fixed valve plate 12B, the fourth channel 104B extends downward and outward from the first fluid control surface 120B of the fixed valve plate 12B, the fifth channel 105B extends downward and outward from the first fluid control surface 120B of the fixed valve plate 12B, the tenth channel 1010B extends downward and outward from the first fluid control surface 120B of the fixed valve plate 12B, and the eleventh channel 1011B extends downward and outward from the first fluid control surface 120B of the fixed valve plate 12B.

As shown in fig. 22 to 25 of the drawings, the valve body 11B of the flat valve 10B of the water treatment system according to the second preferred embodiment of the present invention has an inner wall 111B, wherein the fixed valve plate 12B is adapted to be disposed in the inner cavity 110B with the first fluid control surface 120B facing upward, and the movable valve plate 13B is adapted to be disposed in the inner cavity 110B with the second fluid control surface 130B facing downward, wherein the inner cavity 110B is always communicated with the sixth channel 106B. It should be noted that the fixed valve plate 12B of the flat valve 10B can be detachably disposed on the inner wall 111B of the valve body 11B, and can also be integrally formed with the inner wall 111B of the valve body 11B of the flat valve 10B. It will be understood by those skilled in the art that when the stationary plate 12B is detachably disposed in the valve body 11B, the stationary plate 12B and the valve body 11B maintain synchronization therebetween by a fixing mechanism. For example, the stationary plate 12B has a stopper protruding outward from the edge of the stationary plate 12B, and the inner wall 111B of the valve body 11B has a stopper groove, wherein the stopper of the stationary plate 12B is disposed to engage with the stopper groove of the inner wall 111B of the valve body 11B to ensure synchronization (or no relative rotation) between the stationary plate 12B and the valve body 11B and to ensure that each channel disposed on the stationary plate 12B communicates with a corresponding opening disposed on the valve body 11B. It is understood that when the stationary valve plate 12B is detachably provided in the valve body 11B, the stationary valve plate 12B can be separately manufactured. In other words, the stationary plate 12B can be made of a wear-resistant material, thereby increasing the service life of the stationary plate 12B (or the entire flat valve). Preferably, the first fluid control surface 120B of the stationary vane 12B is smoothed to reduce roughness.

As shown in fig. 22 to 25 of the drawings, the planar valve 10B of the water treatment system according to the second preferred embodiment of the invention further includes a driving element 18B extending upward from the movable valve plate 13B, wherein the driving element 18B is configured to drive the movable valve plate 13B of the planar valve 10B to rotate relative to the fixed valve plate 12B. In other words, the driving element 18B is disposed in connection with the movable valve plate 13B of the flat valve 10B to drive the movable valve plate 13B of the flat valve 10B to rotate relative to the fixed valve plate 12B.

As shown in fig. 22 to 25 of the drawings, the planar valve 10B of the water treatment system according to the second preferred embodiment of the present invention further includes a sealing member 17B, wherein the sealing member 17B is disposed to face the driving member 18B, wherein the sealing member 17B forms a first sealing surface 170B, the driving member 18 forms a second sealing surface 180B, wherein the first sealing surface 170B of the sealing member 17B is disposed on the second sealing surface 180B of the driving member 18B, so that when the driving member 18B rotates relative to the sealing member 17B to drive the movable valve plate 13B to rotate relative to the fixed valve plate 12B, the driving member 18B and the sealing member 17B are sealed from water leakage. Furthermore, the sealing element 17B is arranged to keep the driving element 18B in place, thereby keeping the movable valve plate 13B in a preset position.

As shown in fig. 22 to 25 of the drawings, the diameter of the movable valve plate 13B of the planar valve 10B of the water treatment system according to the second preferred embodiment of the present invention is set to be slightly smaller than the diameter of the inner cavity 110B of the valve body 11B, so that the sixth channel 106B of the planar valve 10B can be kept in communication with the inner cavity 110B of the valve body 11B through the water inlet 1061B.

As shown in fig. 23, 27A to 27E, 32A and 34A of the drawings, a control device 16B of the flat valve 10B of the water treatment system according to the second preferred embodiment of the present invention is configured to drive the driving element 18B to rotate through a transmission mechanism 14B, such as a transmission gear, according to a water treatment control command, so as to drive the movable valve plate 13B of the flat valve 10B to rotate relative to the fixed valve plate 12B, thereby forming the first communication channel 1001B respectively communicated with the sixth opening 1106B (or the inner cavity 110B) and the first opening 1101B of the valve body 11B of the flat valve 10B, the second communication channel 1107B respectively communicated with the second opening 1102B and the third opening 1103B of the valve body 11B, the third communication channel 1003B respectively communicated with the second opening 1102B and the seventh opening 1104B of the valve body 11B, and the fourth communication channel 1104B and the fifth opening 1104B of the valve body 11B B communicated with each other, so as to allow raw water to flow into the inner chamber 110B from the sixth opening 1106B of the valve body 11B, flow into the first water treatment device 20B through the first communication passage 1001B formed by the flat valve 10B, the first opening 1101B of the valve body 11B, and the first communication opening 201B of the first water treatment device 20B, flow out of the second communication opening 202B of the first water treatment device 20B through which raw water is purified by the first water treatment device 20B, and flow into the second water treatment device 30B through which purified water treated by the first water treatment device 20B is divided into two paths, wherein one path of purified water flows into the second water treatment device 30B through the second communication passage 1002B of the flat valve 10B, the third opening 1103B of the flat valve 10B, and the first communication opening 301B of the second water treatment device 30B, and flows out from the second communication opening 302B of the second water treatment device 30B after being treated by the second water treatment device 30B, then flows out through the fourth opening 1104B of the valve body 11B, the fourth communication channel 1004B of the flat valve 10B and the fifth opening 1105B of the valve body 11B and supplies the treated water to the user, wherein the other path of purified water flows out through the third communication channel 1003B of the flat valve 10 and the seventh opening 1107B of the valve body 11B and supplies the treated water to the user; as shown in fig. 23, 28, 32B and 34B of the drawings, according to a second filter element backwashing control command, the driving element 18B is driven to rotate through the transmission mechanism 14B, such as a transmission gear, so as to drive the movable valve plate 13B of the flat valve 10B to rotate relative to the fixed valve plate 12B, thereby forming the fifth communication channel 1005B respectively communicated with the sixth opening 1106B (or the inner cavity 110B) and the fourth opening 1104B of the valve body 11B of the flat valve 10B and forming the sixth communication channel 1006B respectively communicated with the third opening 1103B and the eighth opening 1108B of the valve body 11B, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, and then flow into the fourth opening 1104B of the valve body 11B through the fifth communication channel 1005B formed by the flat valve 10B, then flows into the second water treatment device 30B through the second conducting opening 302B of the second water treatment device 30B, and reversely washes the second water treatment device 30B, and the obtained sewage or wastewater flows out from the first conducting opening 301B of the second water treatment device 30B, then flows into the sixth communicating channel 1006B of the flat valve 10B through the third opening 1103B of the valve body 11B, and then flows out from the eighth opening 1108B of the flat valve 10B; as shown in fig. 23, fig. 29, fig. 32C and fig. 34C of the drawings, according to a first filter backwashing control command, the driving element 18B is driven to rotate through the transmission mechanism 14B, such as a transmission gear, so as to drive the movable valve plate 13B of the flat valve 10B to rotate relative to the fixed valve plate 12B, thereby forming the seventh communication channel 1007B respectively communicated with the sixth opening 1106B (or the inner cavity 110B) and the second opening 1102B of the valve body 11B and the eighth communication channel 1008B respectively communicated with the first opening 1101B and the eighth opening 1108B of the valve body 11B, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, then flow into the second opening 1102B of the valve body 11B through the seventh communication channel 1007B formed by the flat valve 10B, and then flow into the first water treatment device 20B through the second communication opening 202B of the first water treatment device 20B, and the sewage or wastewater obtained after the first water treatment device 20B is backwashed flows out from the first communication opening 201B of the first water treatment device 20B, then flows through the first opening 1101B of the valve body 11B into the eighth communication passage 1008B of the flat valve 10B, and then flows out from the eighth opening 1108B of the flat valve 10B; as shown in fig. 23, 30, 32D and 34D of the drawings, according to a second filter core forward washing control command, the driving element 18B is driven to rotate through the transmission mechanism 14B, such as a transmission gear, so as to drive the movable valve plate 13B of the planar valve 10B to rotate relative to the fixed valve plate 12B, thereby forming a ninth communication channel 1009B respectively communicated with the sixth opening 1106B (or the inner cavity 110B) and the third opening 1103B of the valve body 11B and a tenth communication channel 10010B respectively communicated with the fourth opening 1104B and the eighth opening 1108B of the valve body 11B, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, then flow into the third opening 1103B of the valve body 11B through the ninth communication channel 1009B formed by the planar valve 10B, and then flow into the second water treatment device 30B through the first communication opening 301B of the second water treatment device 30B, and forward flushing the second water treatment device 30B, the obtained sewage or wastewater flows out of the second communication opening 302B of the second water treatment device 30B, then flows through the fourth opening 1104B of the valve body 11B into the tenth communication channel 10010B of the flat valve 10B, and then flows out of the eighth opening 1108B of the flat valve 10B; as shown in fig. 23, fig. 31, fig. 32E and fig. 34E of the drawings, according to a first filter core forward washing control command, the driving element 18B is driven to rotate through the transmission mechanism 14B, such as a transmission gear, so as to drive the movable valve plate 13B of the planar valve 10B to rotate relative to the fixed valve plate 12B, thereby forming the eleventh communication channel 10011B respectively communicated with the sixth opening 1106B (or the inner cavity 110B) and the first opening 1101B of the valve body 11B and the twelfth communication channel 10012B respectively communicated with the second opening 1102B and the eighth opening 1108B, so as to allow raw water to flow from the sixth opening 1106B of the valve body 11B into the inner cavity 110B of the valve body 11B, then flow through the eleventh communication channel 10011B formed by the planar valve 10B into the first opening B of the valve body 11B, and then flow through the first communication opening 201B of the first water treatment device 20B into the first water treatment device 20B, and forward flushing the first water treatment device 20B, the obtained sewage or wastewater flows out from the second communication opening 202B of the first water treatment device 20B, then flows through the second opening 1102B of the valve body 11B into the twelfth communication channel 10012B of the planar valve 10B, and then flows out from the eighth opening 1108B of the planar valve 10B.

It should be noted that the control command, such as a water treatment control command, a second filter element backwashing control command, a first filter element backwashing control command, a second filter element forward washing control command, a first filter element forward washing control command, and the like, may be preset in the control module of the control device 16B, may be received from a control terminal through an electronic communication network, or may be input by a user through an input interface. For example, when the water treatment system of the present invention is configured to have an input interface, such as a touch pad or a control button, for the planar valve 10B, a user can send the control command to the control module of the control device 16B through a touch panel or a corresponding control button, so that the control module of the control device 16B controls the motor of the control device 16B to rotate, thereby driving the driving element 18B to rotate through the transmission mechanism 14B.

Referring to FIGS. 35A-38E, an alternative example of the flat valve 10C of the water treatment system in accordance with the second preferred embodiment of the present invention is illustrated, wherein the flat valve 10C has a first channel 101C, a second channel 102C, a third channel 103C, a fourth channel 104C, a fifth channel 105C, a sixth channel 106C, a seventh channel 107C, an eighth channel 108C, a ninth channel 109C, a tenth channel 1010C and an eleventh channel 1011C, wherein the first channel 101C, the second channel 102C, the third channel 103C, the fourth channel 104C, the fifth channel 105C, the tenth channel 1010C and the eleventh channel 1011C are respectively provided on the fixed valve plate 12C and extend from the first fluid control surface 120C of the fixed valve plate 12C, wherein the sixth channel 106C, the fifth channel 105C, the tenth channel 1010C and the eleventh channel 1011C extend from the first fluid control surface 120C of the fixed valve plate 12C, The seventh channel 107C, the eighth channel 108C and the ninth channel 109C are respectively disposed on the movable plate 13C and extend from the second fluid control surface 130C of the movable plate 13C. The first channel 101C communicates with the first opening 1101C, the second channel 102C communicates with the second opening 1102C, the third channel 103C communicates with the third opening 1103C, the fourth channel 104C communicates with the fourth opening 1104C, the fifth channel 105C communicates with the fifth opening 1105C, the tenth channel 1010C communicates with the seventh opening 1107C, the sixth channel 106C communicates with the inner cavity 110C of the valve body 11C, the ninth channel 109C communicates with the eleventh channel 1011C, and the eleventh channel 1011C communicates with the eighth opening 1108C of the flat valve 10C.

As shown in fig. 35A to 38E of the drawings, when the flat valve 10C is in the second working position, the third working position, the fourth working position and the fifth working position, one port of the fifth channel 105C of the flat valve 10C is closed by the movable valve plate 13C, the other port of the fifth channel 105C of the flat valve 10C is communicated with the fifth opening 1105C of the valve body 11C, one port of the tenth channel 1010C of the flat valve 10C is closed by the movable valve plate 13C, and the other port of the tenth channel 1010C of the flat valve 10C is communicated with the seventh opening 1107C of the valve body 11A. Therefore, when the planar valve 10C is located at the second working position, the third working position, the fourth working position and the fifth working position, the planar valve 10C can no longer form (or cannot form) the thirteenth communication channel 10013B and the fourteenth communication channel 10014B. In other words, when the flat valve 10C is at the second working position, the third working position, the fourth working position and the fifth working position, the flat valve 10C does not provide raw water (or water to be treated) through the fifth opening 1105C and the seventh opening 1107C.

Referring to FIG. 39 of the drawings, in accordance with another aspect of the present invention, there is provided a method for controlling a water circuit of a water treatment system, according to a preferred embodiment of the present invention, comprising the steps of:

(A) forming a water treatment waterway which is communicated with the first communication opening of the first water treatment device, the second communication opening of the first water treatment device, the first communication opening of the second water treatment device and the second communication opening of the second water treatment device in sequence in a water treatment working state of the water treatment system, thereby enabling raw water to flow from the first water treatment device to the second water treatment device and enabling the raw water to be treated in sequence;

(B) forming a second water treatment device backwashing water path which sequentially communicates the second conducting opening of the second water treatment device and the first conducting opening of the second water treatment device in a backwashing working state of the second water treatment device of the water treatment system, so that raw water can flow from the second conducting opening of the second water treatment device to the first conducting opening of the second water treatment device and the second water treatment device is reversely flushed; and

(C) and in the backwashing working state of the first water treatment device of the water treatment system, a first water treatment device backwashing water channel which is communicated with the second communication opening of the first water treatment device and the first communication opening of the first water treatment device in sequence is formed, so that raw water can flow to the first communication opening of the first water treatment device from the second communication opening of the first water treatment device and the first water treatment device is backwashed.

Preferably, the waterway control method of the present invention further comprises the steps of:

(D) in a second water treatment device forward washing working state of the water treatment system, a second water treatment device forward washing water path which is communicated with the first communication opening of the second water treatment device and the second communication opening of the second water treatment device in sequence is formed, so that raw water can flow from the first communication opening of the second water treatment device to the second communication opening of the second water treatment device and the second water treatment device is positively washed; and

(E) in a first water treatment device forward washing working state of the water treatment system, a first water treatment device forward washing water path is formed, which is communicated with the first communication opening of the first water treatment device and the second communication opening of the first water treatment device in sequence, so that raw water can flow from the first communication opening of the first water treatment device to the second communication opening of the first water treatment device and the first water treatment device is positively washed.

More preferably, the water treatment water path, the first water treatment device backwash water path, the second water treatment device forward wash water path and the first water treatment device forward wash water path are all formed by a single fluid valve control of the water treatment system.

It will be understood that the terms first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth and/or fourteenth are used herein only to describe the present invention, to name and distinguish between various components (or elements) of the present invention. Unless otherwise indicated, they do not have an ordinal or numerical meaning by themselves.

It is particularly noted that modifications, variations and/or substitutions which may be made by simple structural changes to the water treatment system or the planar valve of the present invention without departing from the spirit of the invention are also considered to be within the scope of the invention. For example: it is intended that modifications, variations and/or alternatives to the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth and/or eleventh channels of the flat valve according to the invention being arranged at the position of the first and/or second fluid control surface and/or to the shape of the channel openings formed by the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth and/or eleventh channels at the first and/or second fluid control surface, etc., are considered to be within the scope of the invention.

Those skilled in the art will appreciate that the embodiments of the invention illustrated in the drawings and described above are merely exemplary and not limiting of the invention.

It can thus be seen that the objects of the invention are sufficiently well-attained. The embodiments for explaining the functional and structural principles of the present invention have been fully illustrated and described, and the present invention is not limited by changes based on the principles of these embodiments. Accordingly, this invention includes all modifications encompassed within the scope and spirit of the following claims.

Claims

1. A water treatment system, comprising:

2. The water treatment system of claim 1, wherein when the water treatment system is in a first operating state, the fixed valve plate and the movable valve plate of the planar valve form a first communication channel respectively communicating with the sixth opening and the first opening of the valve body, a second communication channel respectively communicating with the second opening and the third opening of the valve body, a third communication channel respectively communicating with the second opening and the seventh opening of the valve body, and a fourth communication channel respectively communicating with the fourth opening and the fifth opening of the valve body.

3. The water treatment system of claim 2, wherein when the water treatment system is in a second operating state, the fixed valve plate and the movable valve plate of the planar valve form a fifth communication passage respectively communicating with the sixth opening and the fourth opening of the valve body and a sixth communication passage respectively communicating with the eighth opening and the third opening.

4. The water treatment system of claim 3, wherein when the water treatment system is in a third operating state, the fixed valve plate and the movable valve plate of the planar valve form a seventh communication passage respectively communicating with the sixth opening and the second opening of the valve body and an eighth communication passage respectively communicating with the eighth opening and the first opening.

5. The water treatment system of claim 4, wherein when the water treatment system is in a fourth operating state, the fixed valve plate and the movable valve plate of the planar valve form a ninth communication passage respectively communicating with the sixth opening and the third opening of the valve body and a tenth communication passage respectively communicating with the eighth opening and the fourth opening.

6. The water treatment system of claim 5 wherein when the water treatment system is in a fifth operational state, the fixed and movable plates of the planar valve form an eleventh communication passage in communication with the sixth and first openings of the valve body, respectively, and a twelfth communication passage in communication with the eighth and second openings, respectively.

7. The water treatment system of claim 6, wherein when the water treatment system is in the second operating state, the third operating state, the fourth operating state and/or the fifth operating state, the fixed valve plate and the movable valve plate of the planar valve further form a thirteenth communication channel respectively communicated with the sixth opening and the fifth opening of the valve body and a fourteenth communication channel respectively communicated with the sixth opening and the seventh opening of the valve body.

8. The water treatment system of claim 2, wherein the fixed valve member has a first fluid control surface and the movable valve member has a second fluid control surface, wherein the second fluid control surface of the movable valve member is disposed on the first fluid control surface of the fixed valve member and the movable valve member is disposed to rotate relative to the fixed valve member; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel and the tenth channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, and the sixth channel is communicated with the inner cavity; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel.

9. The water treatment system of claim 3, wherein the fixed valve member has a first fluid control surface and the movable valve member has a second fluid control surface, wherein the second fluid control surface of the movable valve member is disposed on the first fluid control surface of the fixed valve member and the movable valve member is disposed to rotate relative to the fixed valve member; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel and the tenth channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the inner cavity, and the ninth channel is communicated with the eighth opening; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel; when the water treatment system is in the second working state, the sixth channel is communicated with the fourth channel so as to form the fifth communication channel, and the ninth channel is communicated with the third channel so as to form the sixth communication channel.

10. The water treatment system of claim 4, wherein the fixed valve member has a first fluid control surface and the movable valve member has a second fluid control surface, wherein the second fluid control surface of the movable valve member is disposed on the first fluid control surface of the fixed valve member and the movable valve member is disposed to rotate relative to the fixed valve member; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel and the tenth channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the inner cavity, and the ninth channel is communicated with the eighth opening; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel; when the water treatment system is in the second working state, the sixth channel is communicated with the fourth channel so as to form the fifth communication channel, and the ninth channel is communicated with the third channel so as to form the sixth communication channel; when the water treatment system is in the third working state, the sixth channel is communicated with the second channel so as to form the seventh communication channel, and the ninth channel is communicated with the first channel so as to form the eighth communication channel.

11. The water treatment system of claim 5, wherein the fixed valve member has a first fluid control surface and the movable valve member has a second fluid control surface, wherein the second fluid control surface of the movable valve member is disposed on the first fluid control surface of the fixed valve member and the movable valve member is disposed to rotate relative to the fixed valve member; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel and the tenth channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the inner cavity, and the ninth channel is communicated with the eighth opening; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel; when the water treatment system is in the second working state, the sixth channel is communicated with the fourth channel so as to form the fifth communication channel, and the ninth channel is communicated with the third channel so as to form the sixth communication channel; when the water treatment system is in the third working state, the sixth channel is communicated with the second channel so as to form the seventh communication channel, and the ninth channel is communicated with the first channel so as to form the eighth communication channel; when the water treatment system is in the fourth working state, the sixth channel is communicated with the third channel so as to form the ninth communication channel, and the ninth channel is communicated with the fourth channel so as to form the tenth communication channel.

12. The water treatment system of claim 6 or 7, wherein the fixed valve plate has a first fluid control surface and the movable valve plate has a second fluid control surface, wherein the second fluid control surface of the movable valve plate is disposed on the first fluid control surface of the fixed valve plate and the movable valve plate is disposed to rotate relative to the fixed valve plate; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel and the tenth channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the inner cavity, and the ninth channel is communicated with the eighth opening; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel; when the water treatment system is in the second working state, the sixth channel is communicated with the fourth channel so as to form the fifth communication channel, and the ninth channel is communicated with the third channel so as to form the sixth communication channel; when the water treatment system is in the third working state, the sixth channel is communicated with the second channel so as to form the seventh communication channel, and the ninth channel is communicated with the first channel so as to form the eighth communication channel; when the water treatment system is in the fourth working state, the sixth channel is communicated with the third channel so as to form the ninth communication channel, and the ninth channel is communicated with the fourth channel so as to form the tenth communication channel; when the water treatment system is in the fifth working state, the sixth channel is communicated with the first channel so as to form the eleventh communication channel, and the ninth channel is communicated with the second channel so as to form the twelfth communication channel.

13. The water treatment system of claim 2, wherein the fixed valve member has a first fluid control surface and the movable valve member has a second fluid control surface, wherein the second fluid control surface of the movable valve member is disposed on the first fluid control surface of the fixed valve member and the movable valve member is disposed to rotate relative to the fixed valve member; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel, a tenth channel and an eleventh channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the tenth channel and the eleventh channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, and the sixth channel is communicated with the inner cavity; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel.

14. The water treatment system of claim 3, wherein the fixed valve member has a first fluid control surface and the movable valve member has a second fluid control surface, wherein the second fluid control surface of the movable valve member is disposed on the first fluid control surface of the fixed valve member and the movable valve member is disposed to rotate relative to the fixed valve member; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel, a tenth channel and an eleventh channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the tenth channel and the eleventh channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the inner cavity, and the eleventh channel is communicated with the eighth opening; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel; when the water treatment system is in the second working state, the sixth channel is communicated with the fourth channel so as to form the fifth communication channel, and the ninth channel is respectively communicated with the third channel and the eleventh channel so as to form the sixth communication channel.

15. The water treatment system of claim 4, wherein the fixed valve member has a first fluid control surface and the movable valve member has a second fluid control surface, wherein the second fluid control surface of the movable valve member is disposed on the first fluid control surface of the fixed valve member and the movable valve member is disposed to rotate relative to the fixed valve member; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel, a tenth channel and an eleventh channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the tenth channel and the eleventh channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the inner cavity, and the eleventh channel is communicated with the eighth opening; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel; when the water treatment system is in the second working state, the sixth channel is communicated with the fourth channel so as to form the fifth communication channel, and the ninth channel is respectively communicated with the third channel and the eleventh channel so as to form the sixth communication channel; when the water treatment system is in the third working state, the sixth channel is communicated with the second channel so as to form the seventh communication channel, and the ninth channel is respectively communicated with the first channel and the eleventh channel so as to form the eighth communication channel.

16. The water treatment system of claim 5, wherein the fixed valve member has a first fluid control surface and the movable valve member has a second fluid control surface, wherein the second fluid control surface of the movable valve member is disposed on the first fluid control surface of the fixed valve member and the movable valve member is disposed to rotate relative to the fixed valve member; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel, a tenth channel and an eleventh channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the tenth channel and the eleventh channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the inner cavity, and the eleventh channel is communicated with the eighth opening; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel; when the water treatment system is in the second working state, the sixth channel is communicated with the fourth channel so as to form the fifth communication channel, and the ninth channel is respectively communicated with the third channel and the eleventh channel so as to form the sixth communication channel; when the water treatment system is in the third working state, the sixth channel is communicated with the second channel so as to form the seventh communication channel, and the ninth channel is respectively communicated with the first channel and the eleventh channel so as to form the eighth communication channel; when the water treatment system is in the fourth working state, the sixth channel is communicated with the third channel so as to form a ninth communication channel, and the ninth channel is respectively communicated with the fourth channel and the eleventh channel so as to form a tenth communication channel.

17. The water treatment system of claim 6 or 7, wherein the fixed valve plate has a first fluid control surface and the movable valve plate has a second fluid control surface, wherein the second fluid control surface of the movable valve plate is disposed on the first fluid control surface of the fixed valve plate and the movable valve plate is disposed to rotate relative to the fixed valve plate; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel, a tenth channel and an eleventh channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the tenth channel and the eleventh channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the inner cavity, and the eleventh channel is communicated with the eighth opening; when the water treatment system is in the first working state, the sixth channel is communicated with the first channel so as to form the first communicating channel, the seventh channel is respectively communicated with the second channel and the third channel so as to form the second communicating channel, the seventh channel is respectively communicated with the second channel and the tenth channel so as to form the third communicating channel, and the eighth channel is respectively communicated with the fourth channel and the fifth channel so as to form the fourth communicating channel; when the water treatment system is in the second working state, the sixth channel is communicated with the fourth channel so as to form the fifth communication channel, and the ninth channel is respectively communicated with the third channel and the eleventh channel so as to form the sixth communication channel; when the water treatment system is in the third working state, the sixth channel is communicated with the second channel so as to form the seventh communication channel, and the ninth channel is respectively communicated with the first channel and the eleventh channel so as to form the eighth communication channel; when the water treatment system is in the fourth working state, the sixth channel is communicated with the third channel so as to form a ninth communication channel, and the ninth channel is respectively communicated with the fourth channel and the eleventh channel so as to form a tenth communication channel; when the water treatment system is in the fifth working state, the sixth channel is communicated with the first channel so as to form the eleventh communication channel, and the ninth channel is respectively communicated with the second channel and the eleventh channel so as to form the twelfth communication channel.

18. The water treatment system of claim 8, 9, 10 or 11, wherein the stationary plate of the planar valve has a first central portion, a first extension extending outwardly from the first central portion, and a first edge extending outwardly from the first extension, the movable plate has a second central portion, a second extension extending outwardly from the second central portion, and a second edge extending outwardly from the second extension, wherein the first fluid control surface of the stationary plate has a central portion, wherein the central portion is disposed at the first central portion of the stationary plate, and the portion of the first fluid control surface other than the central portion is divided clockwise equally into a first portion, a second portion, a third portion, a fourth portion, a fifth portion, a sixth portion, a, A seventh portion and an eighth portion; the second fluid control surface of the movable valve plate of the planar valve has a central area, wherein the central area is arranged at the second central part of the movable valve plate, and the part of the second fluid control surface outside the central area is divided into a first area, a second area, a third area, a fourth area, a fifth area, a sixth area, a seventh area and an eighth area clockwise; wherein the first channel extends downwardly from the first and second portions of the first fluid control surface; the fourth channel extends downward from the third portion and the fourth portion of the first flow control surface; the fifth channel extends downwardly from the third portion of the first flow control surface; the second channel extends downwardly from the sixth portion of the first flow control surface; the third channel extends downwardly from the seventh portion and the eighth portion of the first fluid control surface; the tenth channel extends downwardly from the seventh portion of the first flow control surface; the sixth channel extends upwardly from the first region of the second fluid control surface; the eighth channel extends upwardly from the third region of the second fluid control surface; the ninth channel extends upwardly from the fifth area of the second fluid control surface; the seventh channel extends upwardly from the sixth and seventh regions of the second fluid control surface.

19. The water treatment system of claim 13, 14, 15 or 16 wherein the stationary plate of the planar valve has a first central portion, a first extension extending outwardly from the first central portion, and a first edge extending outwardly from the first extension, the movable plate has a second central portion, a second extension extending outwardly from the second central portion, and a second edge extending outwardly from the second extension, wherein the first fluid control surface of the stationary plate has a central portion, wherein the central portion is disposed at the first central portion of the stationary plate, and the portion of the first fluid control surface other than the central portion is divided clockwise equally into a first portion, a second portion, a third portion, a fourth portion, a fifth portion, a sixth portion, a, A seventh portion and an eighth portion; the second fluid control surface of the movable valve plate of the planar valve has a central area, wherein the central area is arranged at the second central part of the movable valve plate, and the part outside the central area of the second fluid control surface is divided into a first area, a second area, a third area, a fourth area, a fifth area, a sixth area, a seventh area and an eighth area clockwise; wherein the first channel extends downwardly from the first and second portions of the first fluid control surface; the fourth channel extends downward from the third portion and the fourth portion of the first flow control surface; the fifth channel extends downwardly from the third portion of the first flow control surface; the second channel extends downwardly from the sixth portion of the first flow control surface; the third channel extends downwardly from the seventh portion and the eighth portion of the first fluid control surface; the tenth channel extends downwardly from the seventh portion of the first flow control surface; the eleventh channel extending downwardly from the central portion of the first flow control surface; the sixth channel extends upwardly from the first region of the second fluid control surface; the eighth channel extends upwardly from the third region of the second fluid control surface; the ninth channel extends from the central region to the fifth region of the second fluid control surface; the seventh channel extends upwardly from the sixth and seventh regions of the second fluid control surface.

20. The water treatment system of claim 1, 2, 3, 4, 5, 6, or 7, wherein the fixed valve plate has a first fluid control surface and the movable valve plate has a second fluid control surface, wherein the second fluid control surface of the movable valve plate is disposed at the first fluid control surface of the fixed valve plate and the movable valve plate is disposed to rotate relative to the fixed valve plate; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel and the tenth channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, and the tenth channel is communicated with the seventh opening; the first channel, the fourth channel, the second channel and the third channel of the plane valve are arranged on the fixed valve plate clockwise in this order; the sixth channel, the eighth channel, the ninth channel and the seventh channel of the planar valve are arranged on the movable valve plate clockwise in this order.

21. The water treatment system of claim 1, wherein the fixed valve member has a first fluid control surface and the movable valve member has a second fluid control surface, wherein the second fluid control surface of the movable valve member is disposed on the first fluid control surface of the fixed valve member and the movable valve member is disposed to rotate relative to the fixed valve member; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel and the tenth channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively disposed on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the sixth opening, and the ninth channel is communicated with the eighth opening.

22. The water treatment system of claim 21 wherein the stationary plate further has an eleventh passage, the ninth passage being in communication with the eleventh passage, the eleventh passage being in communication with the eighth opening.

23. The water treatment system of claim 1, wherein when the water treatment system is in a water treatment operating state, the fixed valve plate and the movable valve plate of the planar valve form a communication passage respectively communicating with the sixth opening and the first opening of the valve body, a communication passage respectively communicating with the second opening and the third opening of the valve body, a communication passage respectively communicating with the second opening and the seventh opening of the valve body, and a communication passage respectively communicating with the fourth opening and the fifth opening of the valve body; when the water treatment system is in a first filter element backwashing working state, the fixed valve plate and the movable valve plate of the plane valve form a communicating channel respectively communicated with the sixth opening and the second opening of the valve body and a communicating channel respectively communicated with the first opening and the eighth opening of the valve body.

24. The water treatment system of claim 23, wherein the fixed and movable plates of the planar valve form a communication passage in communication with the sixth and third openings of the valve body, respectively, and a communication passage in communication with the fourth and eighth openings of the valve body, respectively, when the water treatment system is in a second cartridge forward washing mode of operation.

25. The water treatment system of claim 23 or 24, wherein when the water treatment system is in a first cartridge forward washing mode of operation, the stationary and movable plates of the planar valve form a communication passage in communication with the sixth and first openings of the valve body, respectively, and a communication passage in communication with the second and eighth openings of the valve body, respectively.

26. The water treatment system of claim 23, wherein when the water treatment system is in a second filter element backwashing operation state, the fixed valve plate and the movable valve plate of the planar valve form a communication passage respectively communicating with the sixth opening and the fourth opening of the valve body and a communication passage respectively communicating with the third opening and the eighth opening of the valve body; when the water treatment system is in a first filter element forward washing working state, the fixed valve plate and the movable valve plate of the plane valve form a communication channel respectively communicated with the sixth opening and the first opening of the valve body and a communication channel respectively communicated with the second opening and the eighth opening of the valve body.

27. The water treatment system of claim 1, wherein when the water treatment system is in a water treatment operating state, the fixed valve plate and the movable valve plate of the planar valve form a communication passage respectively communicating with the sixth opening and the first opening of the valve body, a communication passage respectively communicating with the second opening and the third opening of the valve body, a communication passage respectively communicating with the second opening and the seventh opening of the valve body, and a communication passage respectively communicating with the fourth opening and the fifth opening of the valve body; when the water treatment system is in a second filter element forward washing working state, the fixed valve plate and the movable valve plate of the plane valve form a communication channel respectively communicated with the sixth opening and the third opening of the valve body and a communication channel respectively communicated with the fourth opening and the eighth opening of the valve body.

28. The water treatment system of claim 27 wherein the fixed and movable plates of the planar valve form a communication passage in communication with the sixth and fourth openings of the valve body, respectively, and a communication passage in communication with the third and eighth openings of the valve body, respectively, when the water treatment system is in a second filter backwash operating state.

29. The water treatment system of claim 27 or 28, wherein when the water treatment system is in a first cartridge forward washing mode of operation, the stationary and movable plates of the planar valve form a communication passage in communication with the sixth and first openings of the valve body, respectively, and a communication passage in communication with the second and eighth openings of the valve body, respectively.

30. The water treatment system of claim 1, wherein when the water treatment system is in a water treatment operating state, the fixed valve plate and the movable valve plate of the planar valve form a communication passage respectively communicating with the sixth opening and the first opening of the valve body, a communication passage respectively communicating with the second opening and the third opening of the valve body, a communication passage respectively communicating with the second opening and the seventh opening of the valve body, and a communication passage respectively communicating with the fourth opening and the fifth opening of the valve body; when the water treatment system is in a first filter element forward washing working state, the fixed valve plate and the movable valve plate of the plane valve form a communication channel respectively communicated with the sixth opening and the first opening of the valve body and a communication channel respectively communicated with the second opening and the eighth opening of the valve body.

31. The water treatment system of claim 30 wherein the fixed and movable plates of the planar valve form a communication passage in communication with the sixth and fourth openings of the valve body, respectively, and a communication passage in communication with the third and eighth openings of the valve body, respectively, when the water treatment system is in a second filter backwash operating state.

32. A planar valve for a water treatment system, comprising:

a valve body;

a movable valve plate; and

33. The planar valve as claimed in claim 32, wherein the fixed valve plate has a first fluid control surface, the movable valve plate has a second fluid control surface, the second fluid control surface of the movable valve plate is disposed on the first fluid control surface of the fixed valve plate, and the movable valve plate is disposed to be rotatable relative to the fixed valve plate, so that the sixth opening selectively communicates with at least one of the first opening, the second opening, the third opening and the fourth opening through the inner cavity.

34. The flat valve according to claim 32, wherein the fixed valve plate has a first fluid control surface, the movable valve plate has a second fluid control surface, the second fluid control surface of the movable valve plate is disposed on the first fluid control surface of the fixed valve plate, and the movable valve plate is disposed to be rotatable relative to the fixed valve plate, wherein the flat valve has a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel, and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel, and the tenth channel are respectively disposed on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth opening is communicated with the inner cavity, and the sixth channel is communicated with the inner cavity; wherein when the plane valve is at a first working position, the sixth channel is communicated with the first channel, so that the movable valve plate and the fixed valve plate form a first communicating channel respectively communicated with the sixth opening and the first opening of the valve body, the seventh channel is respectively communicated with the second channel and the third channel, so that the movable valve plate and the fixed valve plate form a second communication channel respectively communicated with the second opening and the third opening of the valve body, the seventh channel is respectively communicated with the second channel and the tenth channel, so that the movable valve plate and the fixed valve plate form a third communication channel respectively communicated with the second opening and the seventh opening of the valve body, the eighth channel is respectively communicated with the fourth channel and the fifth channel, so that the movable valve plate and the fixed valve plate form a fourth communication channel respectively communicated with the fourth opening and the fifth opening.

35. The planar valve as claimed in claim 34, wherein the planar valve further has an eighth opening, wherein the ninth passage communicates with the eighth opening, wherein when the planar valve is at a second working position, the sixth passage communicates with the fourth passage, so that the movable plate and the fixed plate form a fifth communication passage respectively communicating with the sixth opening and the fourth opening of the valve body, and the ninth passage communicates with the third passage, so that the movable plate and the fixed plate form a sixth communication passage respectively communicating with the eighth opening and the third opening.

36. The flat valve according to claim 35, wherein when the flat valve is in a third operating position, the sixth passage communicates with the second passage, so that the movable plate and the fixed plate form a seventh communicating passage that communicates with the sixth opening and the second opening of the valve body, respectively, and the ninth passage communicates with the first passage, so that the movable plate and the fixed plate form an eighth communicating passage that communicates with the eighth opening and the first opening, respectively.

37. The flat valve according to claim 36, wherein when the flat valve is in a fourth operating position, the sixth passage communicates with the third passage, so that the movable plate and the fixed plate form a ninth communication passage that communicates with the sixth opening and the third opening of the valve body, respectively, and the ninth passage communicates with the fourth passage, so that the movable plate and the fixed plate form a tenth communication passage that communicates with the eighth opening and the fourth opening, respectively.

38. The flat valve according to claim 37, wherein when the flat valve is in a fifth operating position, the sixth passage communicates with the first passage, so that the movable plate and the fixed plate form an eleventh communicating passage that communicates with the sixth opening and the first opening of the valve body, respectively, and the ninth passage communicates with the second passage, so that the movable plate and the fixed plate form a twelfth communicating passage that communicates with the eighth opening and the second opening, respectively.

39. The planar valve of claim 32, wherein the stationary plate has a first fluid control surface, the movable valve plate has a second fluid control surface, the second fluid control surface of the movable valve plate is disposed on the first fluid control surface of the fixed valve plate, and the movable valve plate is disposed to rotate relative to the fixed valve plate, wherein the planar valve has a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel, a tenth channel, and an eleventh channel, the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the tenth channel and the eleventh channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth opening is communicated with the inner cavity, and the sixth channel is communicated with the inner cavity; wherein when the plane valve is at a first working position, the sixth channel is communicated with the first channel, so that the movable valve plate and the fixed valve plate form a first communicating channel respectively communicated with the sixth opening and the first opening of the valve body, the seventh channel is respectively communicated with the second channel and the third channel, so that the movable valve plate and the fixed valve plate form a second communication channel respectively communicated with the second opening and the third opening of the valve body, the seventh channel is respectively communicated with the second channel and the tenth channel, so that the movable valve plate and the fixed valve plate form a third communication channel respectively communicated with the second opening and the seventh opening of the valve body, the eighth channel is respectively communicated with the fourth channel and the fifth channel, so that the movable valve plate and the fixed valve plate form a fourth communication channel respectively communicated with the fourth opening and the fifth opening.

40. The planar valve as claimed in claim 39, further comprising an eighth opening, wherein the eleventh passage communicates with the eighth opening, wherein when the planar valve is at the second working position, the sixth passage communicates with the fourth passage, so that the movable plate and the fixed plate form a fifth communicating passage respectively communicating with the sixth opening and the fourth opening of the valve body, and the ninth passage communicates with the third passage and the eleventh passage, respectively, so that the movable plate and the fixed plate form a sixth communicating passage respectively communicating with the eighth opening and the third opening.

41. The flat valve according to claim 40, wherein when the flat valve is in a third operating position, the sixth passage communicates with the second passage, so that the movable plate and the fixed plate form a seventh communicating passage that communicates with the sixth opening and the second opening of the valve body, respectively, and the ninth passage communicates with the first passage and the eleventh passage, respectively, so that the movable plate and the fixed plate form an eighth communicating passage that communicates with the eighth opening and the first opening, respectively.

42. The planar valve as claimed in claim 41, wherein when the planar valve is in a fourth operating position, the sixth passage communicates with the third passage, so that the movable plate and the fixed plate form a ninth communication passage respectively communicating with the sixth opening and the third opening of the valve body, and the ninth passage communicates with the fourth passage and the eleventh passage, respectively, so that the movable plate and the fixed plate form a tenth communication passage respectively communicating with the eighth opening and the fourth opening.

43. The planar valve as claimed in claim 42, wherein when the planar valve is in a fifth working position, the sixth passage is in communication with the first passage, so that the movable valve plate and the fixed valve plate form an eleventh communication passage respectively in communication with the sixth opening and the first opening of the valve body, and the ninth passage is in communication with the second passage and the eleventh passage, so that the movable valve plate and the fixed valve plate form a twelfth communication passage respectively in communication with the eighth opening and the second opening.

44. The flat valve according to claim 38 or 43, wherein when the flat valve is at the second, third, fourth and fifth operating positions, the inner cavity of the valve body communicates with the fifth passage, so that the movable valve plate and the fixed valve plate form a thirteenth communicating passage respectively communicating with the sixth opening and the fifth opening, and the inner cavity of the valve body communicates with the tenth passage, so that the movable valve plate and the fixed valve plate form a fourteenth communicating passage respectively communicating with the sixth opening and the seventh opening.

45. The flat valve according to claim 32, wherein the fixed valve plate has a first fluid control surface, the movable valve plate has a second fluid control surface, the second fluid control surface of the movable valve plate is disposed on the first fluid control surface of the fixed valve plate, and the movable valve plate is disposed to be rotatable relative to the fixed valve plate, wherein the flat valve has a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel, and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel, and the tenth channel are respectively disposed on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively arranged on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, and the tenth channel is communicated with the seventh opening; the first channel, the fourth channel, the second channel and the third channel of the plane valve are arranged on the fixed valve plate clockwise in this order; the sixth channel, the eighth channel, the ninth channel and the seventh channel of the planar valve are arranged on the movable valve plate clockwise in this order.

46. The planar valve as claimed in claim 34, 35, 36, 37, 38 or 45, wherein the stationary plate of the planar valve has a first central portion, a first extending portion extending outwardly from the first central portion and a first edge portion extending outwardly from the first extending portion, the movable plate has a second central portion, a second extending portion extending outwardly from the second central portion and a second edge portion extending outwardly from the second extending portion, wherein the first fluid control surface of the stationary plate has a central portion, wherein the central portion is disposed at the first central portion of the stationary plate, and the portion of the first fluid control surface other than the central portion is divided clockwise equally into a first portion, a second portion, a third portion, a fourth portion, a fifth portion, a sixth portion, A seventh portion and an eighth portion; the second fluid control surface of the movable valve plate of the planar valve has a central area, wherein the central area is arranged at the second central part of the movable valve plate, and the part of the second fluid control surface outside the central area is divided into a first area, a second area, a third area, a fourth area, a fifth area, a sixth area, a seventh area and an eighth area clockwise; wherein the first channel extends downwardly from the first and second portions of the first fluid control surface; the fourth channel extends downward from the third portion and the fourth portion of the first flow control surface; the fifth channel extends downwardly from the third portion of the first flow control surface; the second channel extends downwardly from the sixth portion of the first flow control surface; the third channel extends downwardly from the seventh portion and the eighth portion of the first fluid control surface; the tenth channel extends downwardly from the seventh portion of the first flow control surface; the sixth channel extends upwardly from the first region of the second fluid control surface; the eighth channel extends upwardly from the third region of the second fluid control surface; the ninth channel extends upwardly from the fifth area of the second fluid control surface; the seventh channel extends upwardly from the sixth and seventh regions of the second fluid control surface.

47. The planar valve as claimed in claim 39, 40, 41, 42 or 43, wherein the stationary plate of the planar valve has a first central portion, a first extending portion extending outwardly from the first central portion and a first edge portion extending outwardly from the first extending portion, the movable plate has a second central portion, a second extending portion extending outwardly from the second central portion and a second edge portion extending outwardly from the second extending portion, wherein the first fluid control surface of the stationary plate has a central portion, wherein the central portion is disposed at the first central portion of the stationary plate, and the portion of the first fluid control surface outside the central portion is divided clockwise into a first portion, a second portion, a third portion, a fourth portion, a fifth portion, a sixth portion, and the like, A seventh portion and an eighth portion; the second fluid control surface of the movable valve plate of the planar valve has a central area, wherein the central area is arranged at the second central part of the movable valve plate, and the part outside the central area of the second fluid control surface is divided into a first area, a second area, a third area, a fourth area, a fifth area, a sixth area, a seventh area and an eighth area clockwise; wherein the first channel extends downwardly from the first and second portions of the first fluid control surface; the fourth channel extends downward from the third portion and the fourth portion of the first flow control surface; the fifth channel extends downwardly from the third portion of the first flow control surface; the second channel extends downwardly from the sixth portion of the first flow control surface; the third channel extends downwardly from the seventh portion and the eighth portion of the first fluid control surface; the tenth channel extends downwardly from the seventh portion of the first flow control surface; the eleventh channel extending downwardly from the central portion of the first flow control surface; the sixth channel extends upwardly from the first region of the second fluid control surface; the eighth channel extends upwardly from the third region of the second fluid control surface; the ninth channel extends from the central region to the fifth region of the second fluid control surface; the seventh channel extends upwardly from the sixth and seventh regions of the second fluid control surface.

48. The flat valve according to claim 32, wherein the fixed plate has a first fluid control surface, the movable plate has a second fluid control surface, the second fluid control surface of the movable plate is disposed on the first fluid control surface of the fixed plate, and the movable plate is disposed to be rotatable with respect to the fixed plate, wherein the flat valve further has an eighth opening; the planar valve is provided with a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, an eighth channel, a ninth channel and a tenth channel, wherein the first channel, the second channel, the third channel, the fourth channel, the fifth channel and the tenth channel are respectively arranged on the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate; the sixth channel, the seventh channel, the eighth channel and the ninth channel are respectively disposed on the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first channel is communicated with the first opening, the second channel is communicated with the second opening, the third channel is communicated with the third opening, the fourth channel is communicated with the fourth opening, the fifth channel is communicated with the fifth opening, the tenth channel is communicated with the seventh opening, the sixth channel is communicated with the sixth opening, and the ninth channel is communicated with the eighth opening.

49. The planar valve as claimed in claim 48, wherein the stationary plate further has an eleventh passage, the ninth passage communicates with the eleventh passage, and the eleventh passage communicates with the eighth opening.

50. The planar valve of claim 32, further comprising an eighth opening, wherein when the planar valve is in a water treatment station, the stationary plate and the movable plate of the planar valve form a communication channel respectively communicating with the sixth opening and the first opening of the valve body, a communication channel respectively communicating with the second opening and the third opening of the valve body, a communication channel respectively communicating with the second opening and the seventh opening of the valve body, and a communication channel respectively communicating with the fourth opening and the fifth opening of the valve body; when the plane valve is at a first filter element backwashing working position, the fixed valve plate and the movable valve plate of the plane valve form a communicating channel respectively communicated with the sixth opening and the second opening of the valve body and a communicating channel respectively communicated with the first opening and the eighth opening of the valve body.

51. The planar valve as claimed in claim 50, wherein when the planar valve is in a second filter element normal washing operation position, the fixed valve plate and the movable valve plate of the planar valve form a communication passage respectively communicating with the sixth opening and the third opening of the valve body and a communication passage respectively communicating with the fourth opening and the eighth opening of the valve body.

52. The planar valve as claimed in claim 50 or 51, wherein when the planar valve is in a first filter element normal washing working position, the fixed valve plate and the movable valve plate of the planar valve form a communication passage respectively communicated with the sixth opening and the first opening of the valve body and a communication passage respectively communicated with the second opening and the eighth opening of the valve body.

53. The flat valve according to claim 50, wherein when the flat valve is in a second filter backwashing operation position, the fixed valve plate and the movable valve plate of the flat valve form a communication passage respectively communicating with the sixth opening and the fourth opening of the valve body and a communication passage respectively communicating with the third opening and the eighth opening of the valve body; when the planar valve is located at a first filter element forward washing working position, the fixed valve plate and the movable valve plate of the planar valve form a communication channel which is respectively communicated with the sixth opening and the first opening of the valve body and a communication channel which is respectively communicated with the second opening and the eighth opening of the valve body.

54. The planar valve of claim 32, further comprising an eighth opening, wherein when the planar valve is in a water treatment station, the stationary plate and the movable plate of the planar valve form a communication channel respectively communicating with the sixth opening and the first opening of the valve body, a communication channel respectively communicating with the second opening and the third opening of the valve body, a communication channel respectively communicating with the second opening and the seventh opening of the valve body, and a communication channel respectively communicating with the fourth opening and the fifth opening of the valve body; when the planar valve is located at a second filter element forward washing working position, the fixed valve plate and the movable valve plate of the planar valve form a communication channel respectively communicated with the sixth opening and the third opening of the valve body and a communication channel respectively communicated with the fourth opening and the eighth opening of the valve body.

55. The flat valve according to claim 54, wherein when the flat valve is in a second filter backwashing operation position, the fixed valve plate and the movable valve plate of the flat valve form a communication passage respectively communicating with the sixth opening and the fourth opening of the valve body and a communication passage respectively communicating with the third opening and the eighth opening of the valve body.

56. A flat valve according to claim 54 or 55, wherein the stationary and movable plates of the flat valve form a communication channel with the sixth and first openings of the valve body and a communication channel with the second and eighth openings of the valve body, respectively, when the flat valve is in a first cartridge washing position.

57. The planar valve of claim 32, further comprising an eighth opening, wherein when the planar valve is in a water treatment station, the stationary plate and the movable plate of the planar valve form a communication channel respectively communicating with the sixth opening and the first opening of the valve body, a communication channel respectively communicating with the second opening and the third opening of the valve body, a communication channel respectively communicating with the second opening and the seventh opening of the valve body, and a communication channel respectively communicating with the fourth opening and the fifth opening of the valve body; when the planar valve is located at a first filter element forward washing working position, the fixed valve plate and the movable valve plate of the planar valve form a communication channel which is respectively communicated with the sixth opening and the first opening of the valve body and a communication channel which is respectively communicated with the second opening and the eighth opening of the valve body.

58. The flat valve according to claim 57, wherein the fixed plate and the movable plate of the flat valve form a communication passage respectively communicating with the sixth opening and the fourth opening of the valve body and a communication passage respectively communicating with the third opening and the eighth opening of the valve body when the flat valve is in a second filter backwashing operation position.

59. A method of controlling a waterway of a water treatment system having a first water treatment device having a first communication opening and a second water treatment device having a first communication opening and a second communication opening, comprising the steps of:

(A) forming a water treatment waterway which is communicated with the first communication opening of the first water treatment device, the second communication opening of the first water treatment device, the first communication opening of the second water treatment device and the second communication opening of the second water treatment device in sequence in a water treatment working state of the water treatment system, so that raw water can flow from the first water treatment device to the second water treatment device and be treated in sequence;

60. The waterway control method of claim 59, further comprising the steps of:

(D) in the second water treatment device forward washing working state of the water treatment system, a second water treatment device forward washing water path is formed, and the first conduction opening of the second water treatment device and the second conduction opening of the second water treatment device are sequentially communicated, so that raw water can flow to the second conduction opening of the second water treatment device from the first conduction opening of the second water treatment device and the second water treatment device is positively washed.

61. The waterway control method of claim 59, further comprising the steps of:

62. The waterway control method of claim 60, further comprising the steps of:

63. The method of claim 62, wherein the water treatment circuit, the first water treatment device backwash circuit, the second water treatment device forward wash circuit and the first water treatment device forward wash circuit are all controlled by a single fluid valve of the water treatment system.