water purifier

Abstract

The present application provides a kind of water purifier, it includes a control valve for controlling water flow and a filter device for purifying raw water, wherein the filter device includes a shell, a first filter element and a second filter element, wherein the shell forms a first containing cavity, wherein the first filter element and the second filter element are both arranged in the first containing cavity of the shell, and the shell and the first filter element form a raw water passage between them, the first filter element and the second filter element form a purified water passage between them, the second filter element has a purified water outlet, wherein the filter device has a first communication opening, a second communication opening and a third communication opening, the control valve includes a valve body and a valve core, wherein the valve body forms a valve cavity, a first opening, a second opening, a third opening, a fourth opening, a fifth opening, a raw water inlet and a blowdown opening.

Description

TECHNICAL FIELD

[0001] The present application relates to a water purifier, in particular to a water purifier capable of performing two-stage purification on raw water (or tap water). Further, the water purifier of the present application can also control the raw water to perform reverse washing on its first-stage filter element. BACKGROUND

[0002] With the increasing improvement of people's living standards and the increasing emphasis on health, people's requirements for the quality of domestic water are also getting higher and higher. However, the quality of tap water can also be affected by the external environment and the water supply pipeline. For example, the increase of sand content in the water source of tap water can cause the deterioration of the quality of tap water. The lack of cleaning of tap water supply pipeline network for a long time, aging of pipeline network, etc. can also affect the quality of tap water. Therefore, in many cases, tap water is not suitable for direct drinking. In order to solve the above problems of tap water, various household water purification equipment has appeared on the market, such as ultrafiltration water purifier, RO membrane water purifier, pre-filter, etc. to purify tap water. Among these water purification equipment, faucet water purifier is favored by many consumers because of its small size, easy installation and removal, and automatic purification of tap water under the water pressure without the need of electricity. However, the existing faucet water purifier also has many defects. First, most of the existing faucet water purifiers only use a single purification filter element, for example, only use a ceramic filter element, an activated carbon filter element or an ultrafiltration filter element to purify tap water. The faucet water purifier using a single ceramic filter element or activated carbon filter element is not completely purified because the pore size of the ceramic filter element or activated carbon filter element is relatively large, and the purified water obtained is not suitable for direct drinking. The faucet water purifier using a single ultrafiltration filter element to purify tap water is easily clogged and quickly becomes unusable because the pore size of the ultrafiltration filter element is relatively small. Especially in the case of poor water quality, the ultrafiltration filter element is easily clogged.

[0003] Chinese patent application No. 201811199228.2 discloses a faucet water purifier using microfiltration ceramic, activated carbon and ultrafiltration ceramic to purify tap water. When the faucet water purifier processes tap water, it first uses microfiltration ceramic to microfiltrate tap water, then uses activated carbon to filter the purified water generated by the microfiltration ceramic, and the purified water generated by the activated carbon is further filtered by the ultrafiltration ceramic to generate ultrafiltration purified water. However, the faucet water purifier disclosed in the invention patent lacks a flushing mechanism, especially a mechanism for flushing the microfiltration ceramic and the ultrafiltration ceramic, which will cause a large amount of impurities and microorganisms to accumulate on the surface of the microfiltration ceramic and the ultrafiltration ceramic membrane in a very short period of time, clogging the microfiltration ceramic and the ultrafiltration ceramic membrane. Even, the accumulation of a large amount of microorganisms can cause the faucet water purifier provided by the invention patent to smell bad after a very short period of use. Finally, the water inlet of the faucet water purifier is connected to the water outlet of the faucet. In other words, the water supply and water treatment of the faucet water purifier are controlled by the faucet switch, not by the faucet water purifier itself. This makes it difficult for the faucet water purifier to achieve functions other than water treatment (such as filtration). For example, controlling and adjusting the water flow of raw water flowing through the faucet water purifier and being treated by it.

[0004] Chinese utility model patent application No. 201220080023.4 discloses a faucet water purifier using ceramic and ultrafiltration filter cartridges to purify tap water in two stages. The primary filter cartridge of the faucet water purifier can preliminarily purify tap water, and the secondary filter cartridge further purifies the purified water generated by the primary filter cartridge. However, the faucet water purifier provided by the utility model patent application lacks a mechanism for flushing the primary filter cartridge and a mechanism for cleaning (or flushing) the secondary filter cartridge, which causes the faucet water purifier provided by the utility model patent application to also smell bad after a very short period of use. Finally, the water inlet of the faucet water purifier is connected to the water outlet of the faucet. In other words, the water supply and water treatment of the faucet water purifier are also controlled by the faucet switch, not by the faucet water purifier itself. This makes it difficult for the faucet water purifier to achieve functions other than water treatment (such as filtration). For example, controlling and adjusting the water flow of raw water flowing through the faucet water purifier and being treated by it. SUMMARY

[0005] The main advantage of the present invention is to provide a water purifier, wherein the water purifier of the present invention integrates a primary filter cartridge and a secondary filter cartridge, wherein the primary filter cartridge is adapted to purify tap water in a primary stage, and the secondary filter cartridge is adapted to further purify the purified water generated by the primary filter cartridge.

[0006] Another advantage of the present application is to provide a water purifier, wherein the raw water inlet of the water purifier is adapted to be directly connected to a raw water source, such as a tap water pipe. In other words, the connection between the raw water inlet of the water purifier and the raw water source, such as a tap water pipe, is no longer through an adapter of a faucet. Accordingly, the water purifier of the present application can independently control the flow of raw water to its filtering device.

[0007] Another advantage of the present application is to provide a water purifier, wherein the control valve of the water purifier is capable of controlling the size of the raw water (or tap water) flow to the filtering device of the water purifier. Further, the control valve of the water purifier can achieve stepless control of the flow of the water purifier to meet the different water usage requirements of a user or the water usage requirements of different users.

[0008] Another advantage of the present application is to provide a water purifier, wherein the control valve of the water purifier is capable of cutting off the flow of raw water to the filtering device of the water purifier, thereby avoiding the filtering device of the water purifier being subjected to water hammer from raw water (e.g. tap water) all the time, thereby improving the service life of the water purifier.

[0009] Another advantage of the present application is to provide a water purifier, wherein the control valve of the water purifier is capable of controlling the reverse flushing of the filter cartridge (e.g. tap water), thereby improving the service life of the filter cartridge of the water purifier.

[0010] Another advantage of the present application is to provide a water purifier, wherein the water purifier of the present application can be integrated with a faucet. In other words, the water purifier of the present application can be connected to a tap water pipe together with a faucet. Further, the water purifier and the faucet can be connected to a tap water pipe respectively, thereby forming a tee structure of the faucet, the water purifier and the tap water pipe. In addition, the integration of the water purifier with the faucet reduces the installation procedure of installing the water purifier and the faucet respectively.

[0011] Another advantage of the present application is to provide a water purifier, wherein the purified water generated by the primary filter of the water purifier of the present application can be provided to the user, and when the purified water generated by the primary filter is provided, it can be guided to flow through the outer surface of the ultrafiltration membrane filaments of the secondary filter, so that the outer surface of the ultrafiltration membrane filaments of the secondary filter is washed. Accordingly, the secondary filter is an ultrafiltration filter, and the ultrafiltration filter is an outer pressure type ultrafiltration membrane filament filter. Alternatively, the ultrafiltration filter is an inner pressure type ultrafiltration membrane filament filter, and accordingly, when the purified water generated by the primary filter is provided, it can be guided to flow through the membrane filament channels of the ultrafiltration membrane filaments of the secondary filter, so that the inside of the ultrafiltration membrane filaments of the secondary filter is washed. Those skilled in the art can understand that the secondary filter can also be a filter made of other materials, such as a ceramic filter, a carbon fiber filter, a PP cotton filter, or an activated carbon filter. Alternatively, the secondary filter is a composite filter made of multiple materials, for example, a composite filter composed of any two or more of ceramic, carbon fiber, PP cotton, and activated carbon particles.

[0012] Another advantage of the present application is to provide a water purifier, wherein the purified water generated by the primary filter of the water purifier of the present application and the purified water generated by the secondary filter are provided through different water outlets, so as to prevent the purified water generated by the primary filter from affecting the purified water generated by the secondary filter. In other words, the channel through which the purified water generated by the secondary filter of the water purifier of the present application flows is independent of the channel through which the purified water generated by the primary filter flows. In addition, the provision of the purified water generated by the primary filter and the purified water generated by the secondary filter of the water purifier of the present application is more in line with the usage habits of consumers.

[0013] Another advantage of the present application is to provide a water purifier, wherein the control valve of the water purifier of the present application can control the reverse flushing of raw water (e.g., tap water) to the primary filter, so as to improve the service life of the primary filter of the water purifier. It can be understood that the reverse flushing of raw water to the primary filter of the water purifier of the present application can improve the filtering effect of the primary filter, reduce the aggregation of impurities on the surface of the primary filter, and prevent the breeding of bacteria in the water purifier.

[0014] Another advantage of the present application is to provide a water purifier, wherein the purified water generated by the primary filter of the water purifier of the present application and the sewage generated by the reverse flushing are discharged through different water outlets, so as to prevent the sewage generated by the primary filter from polluting the purified water outlet thereof. In other words, the channel through which the sewage generated by the primary filter of the water purifier of the present application flows is independent of the channel through which the purified water generated by the primary filter flows.

[0015] Another advantage of the present application is to provide a water purifier, wherein purified water generated by a secondary filter cartridge of the water purifier and sewage water generated by backwashing a primary filter cartridge are discharged through different water outlets, thereby preventing sewage water generated by the primary filter cartridge from contaminating a purified water outlet of the secondary filter cartridge of the water purifier. In other words, a passage through which sewage water generated by the primary filter cartridge of the water purifier flows is independent of a passage through which purified water generated by the secondary filter cartridge flows.

[0016] Another advantage of the present application is to provide a control valve for a water purifier, wherein the control valve for the water purifier can control the water purifier to provide purified water generated by a primary filter cartridge, purified water generated by a secondary filter cartridge, and control discharge of sewage water, and the purified water generated by the primary filter cartridge, the purified water generated by the secondary filter cartridge, and the sewage water are discharged through different outlets.

[0017] Other objects and features of the present application will become apparent from the following detailed description of the application when considered in conjunction with the accompanying drawings.

[0018] According to an aspect of the present application, a water purifier capable of achieving the aforementioned objects and other objects and advantages of the present application includes:

[0019] a control valve for controlling flow of water; and

[0020] a filter device for purifying raw water, wherein the filter device includes a housing, a primary filter cartridge, and a secondary filter cartridge, wherein the housing forms a first receiving cavity, the primary filter cartridge and the secondary filter cartridge are disposed in the first receiving cavity of the housing, the housing and the primary filter cartridge form a raw water passage therebetween, the primary filter cartridge and the secondary filter cartridge form a purified water passage therebetween, and the secondary filter cartridge has a purified water outlet, wherein the filter device has a first communication opening, a second communication opening, and a third communication opening, the control valve includes a valve body and a valve core, the valve body forms a valve cavity, a first opening, a second opening, a third opening, a fourth opening, a fifth opening, a raw water inlet, and a sewage discharge opening, the first communication opening of the filter device is in communication with the raw water passage of the filter device, the second communication opening of the filter device is in communication with the purified water passage of the filter device, the third communication opening of the filter device is in communication with the purified water outlet of the secondary filter cartridge, and the valve core is disposed in the valve cavity, wherein the first opening of the valve body is adapted to be in communication with the first communication opening of the filter device, the second opening of the valve body is adapted to be in communication with the second communication opening of the filter device, the fourth opening of the valve body is adapted to be in communication with the third communication opening of the filter device, and the raw water inlet of the valve body is adapted to be in communication with a raw water source.

[0021] These and other objects, features, and advantages of the present application will become apparent with reference to the following description and drawings.

[0022] These and other objects, features, and advantages of the present application will become apparent with reference to the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] FIG. 1A is a front view of a water purifier according to a first embodiment of the present application.

[0024] FIG. 1B is an assembled view of the water purifier according to the first embodiment of the present application.

[0025] FIG. 1C is a sectional view of the water purifier according to the first embodiment of the present application.

[0026] FIG. 1D is another sectional view of the water purifier according to the first embodiment of the present application.

[0027] FIG. 2A is an assembled view of a control valve of the water purifier according to the first embodiment of the present application.

[0028] FIG. 2B is an assembled view of a filter device of the water purifier according to the first embodiment of the present application.

[0029] FIG. 3A is a front view of the filter device of the water purifier according to the first embodiment of the present application.

[0030] FIG. 3B is a sectional view of the filter device of the water purifier according to the first embodiment of the present application.

[0031] FIG. 3C is another sectional view of the filter device of the water purifier according to the first embodiment of the present application, which shows a brush of the filter device.

[0032] FIG. 3D is a perspective view of a primary filter cartridge of the filter device of the water purifier according to the first embodiment of the present application.

[0033] FIG. 3E is a perspective view of a secondary filter cartridge of the filter device of the water purifier according to the first embodiment of the present application.

[0034] FIG. 4A is a perspective view of a base of the filter device of the water purifier according to the first embodiment of the present application.

[0035] FIG. 4B is a sectional view of the base of the filter device of the water purifier according to the first embodiment of the present application.

[0036] FIG. 4C is another sectional view of the base of the filter device of the water purifier according to the first embodiment of the present application.

[0037] FIG. 4D is another sectional view of the base of the filter device of the water purifier according to the first embodiment of the present application.

[0038] FIG. 5A is a perspective view of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the first passage, the second passage, the third passage, the fourth passage, the fifth passage, the eighth passage, the ninth passage, the tenth passage, and the eleventh passage of the planar valve.

[0039] FIG. 5B is another perspective view of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the first passage, the second passage, the third passage, the fourth passage, the fifth passage, the eighth passage, the ninth passage, the tenth passage, the eleventh passage, and the second seal of the planar valve.

[0040] FIG. 5C is another perspective view of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the first opening, the second opening, the third opening, the fourth opening, the fifth opening, and the raw water inlet of the valve body.

[0041] FIG. 5D is another perspective view of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the raw water inlet of the valve body.

[0042] FIG. 5E is another perspective view of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the third opening and the fifth opening of the valve body.

[0043] FIG. 5F is another perspective view of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the blowdown opening of the valve body.

[0044] FIG. 5G is a top view of the valve body of the planar valve of the water purifier according to the first embodiment of the present application.

[0045] FIG. 5H is a bottom view of the valve body of the planar valve of the water purifier according to the first embodiment of the present application.

[0046] FIG. 5I is a front view of the valve body of the planar valve of the water purifier according to the first embodiment of the present application.

[0047] FIG. 5Jis a side view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application.

[0048] FIG. 5K is another side view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application.

[0049] FIG. 6A is a sectional view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that the first passage, the eighth passage and the eleventh passage of the flat valve are all communicated with the first opening.

[0050] FIG. 6B is a sectional view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that the second passage of the flat valve is communicated with the second opening, the fourth passage is communicated with the fourth opening, and the raw water inlet is communicated with the valve cavity.

[0051] FIG. 6C is a sectional view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that the third passage of the flat valve is communicated with the third opening.

[0052] FIG. 6D is a sectional view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that the fifth passage of the flat valve is communicated with the fifth opening.

[0053] FIG. 6E is a sectional view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that the second passage of the flat valve is communicated with the tenth passage, the ninth passage is communicated with the blowdown opening.

[0054] FIG. 6F is a sectional view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that the second passage of the flat valve is communicated with the tenth passage, the first passage, the eighth passage and the eleventh passage are communicated.

[0055] FIG. 7A is a sectional view of the flat valve according to the first embodiment of the present application, wherein the fixing device is arranged in the valve cavity of the flat valve.

[0056] FIG. 7B is a perspective view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application, wherein the flow guide plate of the water purifier is arranged in the valve body of the flat valve.

[0057] FIG. 7Cis a perspective view of the valve body of the flat valve of the water purifier according to the first embodiment of the present application, wherein the sealing gasket of the water purifier is arranged on the valve body of the flat valve.

[0058] FIG. 7D is a perspective view of the flow guide plate of the water purifier according to the first embodiment of the present application.

[0059] FIG. 7E is another perspective view of the flow guide plate of the water purifier according to the first embodiment of the present application.

[0060] FIG. 7F is a perspective view of the sealing gasket of the water purifier according to the first embodiment of the present application.

[0061] FIG. 8A is a perspective view of the fixing device of the water purifier according to the first embodiment of the present application.

[0062] FIG. 8B is a sectional view of the fixing device of the water purifier according to the first embodiment of the present application.

[0063] FIG. 8C is a perspective view of the fixing portion of the fixed valve piece of the flat valve of the water purifier according to the first embodiment of the present application, wherein the first sealing groove of the fixing portion is shown in the figure.

[0064] FIG. 8D is another perspective view of the fixing portion of the fixed valve piece of the flat valve of the water purifier according to the first embodiment of the present application, wherein the second sealing groove of the fixing portion is shown in the figure.

[0065] FIG. 8E is the fixing portion and the high end portion of the fixed valve piece of the flat valve of the water purifier according to the first embodiment of the present application, wherein the high end portion of the fixed valve piece is arranged on the fixing portion.

[0066] FIG. 8F is a perspective view of the first sealing member of the sealing assembly of the water purifier according to the first embodiment of the present application.

[0067] FIG. 8G is a perspective view of the second sealing member of the sealing assembly of the water purifier according to the first embodiment of the present application.

[0068] FIG. 8H is a perspective view of the fixing support of the fixing device of the water purifier according to the first embodiment of the present application, wherein the limiting groove of the fixing support is shown in the figure.

[0069] FIG. 9A is a perspective view of the fixed valve piece of the flat valve of the water purifier according to the first embodiment of the present application.

[0070] FIG. 9B is a plan view of the fixed valve plate of the flat valve of the water purifier according to the first embodiment of the present application.

[0071] FIG. 9C is a bottom view of the fixed valve plate of the flat valve of the water purifier according to the first embodiment of the present application.

[0072] FIG. 9D is a perspective view of the moving valve plate of the flat valve of the water purifier according to the first embodiment of the present application.

[0073] FIG. 9E is a plan view of the moving valve plate of the flat valve of the water purifier according to the first embodiment of the present application.

[0074] FIG. 9F is a bottom view of the moving valve plate of the flat valve of the water purifier according to the first embodiment of the present application.

[0075] FIG. 10A is a schematic structural view of the water purifier according to the first embodiment of the present application, wherein the water purifier shown in the figure is in the first purification working position, and the arrow in the figure points to the water flow direction.

[0076] FIG. 10B is a schematic structural view of the water purifier according to the first embodiment of the present application, wherein the water purifier shown in the figure is in the second purification working position, and the arrow in the figure points to the water flow direction.

[0077] FIG. 10C is a schematic structural view of the water purifier according to the first embodiment of the present application, wherein the water purifier shown in the figure is in the standby working position.

[0078] FIG. 10D is a schematic structural view of the water purifier according to the first embodiment of the present application, wherein the water purifier shown in the figure is in the backwashing working position, and the arrow in the figure points to the water flow direction.

[0079] FIG. 11A is a schematic structural view of the fixed valve plate of the flat valve of the water purifier according to the first embodiment of the present application.

[0080] FIG. 11B is a schematic structural view of the moving valve plate of the flat valve of the water purifier according to the first embodiment of the present application, wherein the broken line in the figure shows the through channel of the moving valve plate.

[0081] FIG. 11C is a schematic structural view of the fixed valve plate of the flat valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that each channel is arranged at a specific equal division position of the fixed valve plate.

[0082] FIG. 11Dis a cross-sectional view of the moving valve disc of the planar valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that each passage is arranged at a specific cross-sectional position of the moving valve disc.

[0083] FIG. 12A is a cross-sectional view of the planar valve of the water purifier according to the first embodiment of the present application when it is completely switched to the first purification working position, showing the communication between the passages of the moving valve disc and the passages of the fixed valve disc of the planar valve, wherein the shaded portions in the figure show the mutually communicating passages of the moving valve disc and the fixed valve disc of the planar valve.

[0084] FIG. 12B is a cross-sectional view of the planar valve of the water purifier according to the first embodiment of the present application when it is switched from the standby working position to the first purification working position or from the first purification working position to the standby working position, showing the communication between the passages of the moving valve disc and the passages of the fixed valve disc of the planar valve during the switching process, wherein the shaded portions in the figure show the mutually communicating passages of the moving valve disc and the fixed valve disc of the planar valve.

[0085] FIG. 12C is a cross-sectional view of the planar valve of the water purifier according to the first embodiment of the present application when it is completely switched to the second purification working position, showing the communication between the passages of the moving valve disc and the passages of the fixed valve disc of the planar valve, wherein the shaded portions in the figure show the mutually communicating passages of the moving valve disc and the fixed valve disc of the planar valve.

[0086] FIG. 12D is a cross-sectional view of the planar valve of the water purifier according to the first embodiment of the present application when it is switched from the standby working position to the second purification working position or from the second purification working position to the standby working position, showing the communication between the passages of the moving valve disc and the passages of the fixed valve disc of the planar valve during the switching process, wherein the shaded portions in the figure show the mutually communicating passages of the moving valve disc and the fixed valve disc of the planar valve.

[0087] FIG. 12E is a cross-sectional view of the planar valve of the water purifier according to the first embodiment of the present application when it is in the standby working position, showing the communication between the passages of the moving valve disc and the passages of the fixed valve disc of the planar valve, wherein the shaded portions in the figure show the mutually communicating passages of the moving valve disc and the fixed valve disc of the planar valve.

[0088] FIG. 12F is a cross-sectional view of the planar valve of the water purifier according to the first embodiment of the present application when it is in the backwashing working position, showing the communication between the passages of the moving valve disc and the passages of the fixed valve disc of the planar valve, wherein the shaded portions in the figure show the mutually communicating passages of the moving valve disc and the fixed valve disc of the planar valve.

[0089] FIG. 13is an assembly view of an alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0090] FIG. 14A is a front view of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0091] FIG. 14B is a sectional view of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0092] FIG. 14C is another sectional view of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention, wherein the view shows the brush of the filter device.

[0093] FIG. 14D is a perspective view of the primary filter cartridge of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0094] FIG. 14E is a perspective view of the secondary filter cartridge of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0095] FIG. 15A is a perspective view of the base of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0096] FIG. 15B is a sectional view of the base of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0097] FIG. 15C is another sectional view of the base of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0098] FIG. 15D is another sectional view of the base of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0099] FIG. 16 is an assembly view of another alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0100] FIG. 17A is a front view of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0101] FIG. 17B is a sectional view of the alternative embodiment of the filter device of the water purifier according to the first embodiment of the present invention.

[0102] FIG. 17Cis another sectional view of the alternative embodiment of the filter assembly of the water purifier according to the first embodiment of the present invention, wherein the view shows the brush of the filter assembly.

[0103] FIG. 17D is a perspective view of the primary filter cartridge of the alternative embodiment of the filter assembly of the water purifier according to the first embodiment of the present invention.

[0104] FIG. 17E is a perspective view of the secondary filter cartridge of the alternative embodiment of the filter assembly of the water purifier according to the first embodiment of the present invention.

[0105] FIG. 17F is a sectional view of the secondary filter cartridge of the alternative embodiment of the filter assembly of the water purifier according to the first embodiment of the present invention.

[0106] FIG. 18A is a perspective view of the base of the alternative embodiment of the filter assembly of the water purifier according to the first embodiment of the present invention.

[0107] FIG. 18B is a sectional view of the base of the alternative embodiment of the filter assembly of the water purifier according to the first embodiment of the present invention.

[0108] FIG. 18C is another sectional view of the base of the alternative embodiment of the filter assembly of the water purifier according to the first embodiment of the present invention.

[0109] FIG. 18D is another sectional view of the base of the alternative embodiment of the filter assembly of the water purifier according to the first embodiment of the present invention.

[0110] FIG. 19 is an assembly view of an alternative embodiment of the control valve of the water purifier according to the first embodiment of the present invention.

[0111] FIG. 20A is a perspective view of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present invention, wherein the view shows the first passage, the second passage, the third passage, the fourth passage, the fifth passage, the eighth passage, the ninth passage, the tenth passage, the eleventh passage, and the raw water inlet passage of the planar valve.

[0112] FIG. 20B is another perspective view of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present invention, wherein the view shows the first passage, the second passage, the third passage, the fourth passage, the fifth passage, the eighth passage, the ninth passage, the tenth passage, the eleventh passage, the raw water inlet passage, and the second seal of the planar valve.

[0113] FIG. 20Cis another perspective view of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the first opening, the second opening, the third opening, the fourth opening and the fifth opening of the valve body.

[0114] FIG. 20D is another perspective view of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the raw water inlet of the valve body.

[0115] FIG. 20E is another perspective view of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the third opening and the fifth opening of the valve body.

[0116] FIG. 20F is another perspective view of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows the blowdown opening of the valve body.

[0117] FIG. 20G is a top view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application.

[0118] FIG. 20H is a bottom view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application.

[0119] FIG. 20I is a front view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application.

[0120] FIG. 20J is a side view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application.

[0121] FIG. 20K is another side view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application.

[0122] FIG. 21A is a sectional view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows that the first passage, the eighth passage and the eleventh passage of the planar valve are in communication with the first opening, and the raw water inlet passage is in communication with the raw water inlet.

[0123] FIG. 21B is a sectional view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the first embodiment of the present application, wherein the view shows that the second passage of the planar valve is in communication with the second opening, and the fourth passage is in communication with the fourth opening.

[0124] FIG. 21Cis a cross-sectional view of the valve body of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present invention, wherein the figure shows that the third passage of the flat valve is in communication with the third opening.

[0125] FIG. 21D is a cross-sectional view of the valve body of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present invention, wherein the figure shows that the fifth passage of the flat valve is in communication with the fifth opening.

[0126] FIG. 21E is a cross-sectional view of the valve body of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present invention, wherein the figure shows that the ninth passage of the flat valve is in communication with the blowdown opening.

[0127] FIG. 21F is a cross-sectional view of the valve body of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present invention, wherein the figure shows that the second passage of the flat valve is in communication with the tenth passage, and the first passage, the eighth passage and the eleventh passage are in communication.

[0128] FIG. 22A is a cross-sectional view of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present invention, wherein the fixing device is arranged in the valve cavity of the flat valve.

[0129] FIG. 22B is a perspective view of the valve body of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present invention, wherein the flow guide plate of the water purifier according to the present invention is arranged in the valve body of the flat valve.

[0130] FIG. 22C is a perspective view of the valve body of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present invention, wherein the sealing gasket of the water purifier according to the present invention is arranged in the valve body of the flat valve.

[0131] FIG. 22D is a perspective view of the flow guide plate of the water purifier according to the first embodiment of the present invention.

[0132] FIG. 22E is another perspective view of the flow guide plate of the water purifier according to the first embodiment of the present invention.

[0133] FIG. 22F is a perspective view of the sealing gasket of the water purifier according to the first embodiment of the present invention.

[0134] FIG. 23A is a perspective view of the fixing device of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present invention.

[0135] FIG. 23Bis a sectional view of the fixing device of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application.

[0136] FIG. 23C is a perspective view of the fixing portion of the stationary valve disc of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application, wherein the view shows the first sealing groove of the fixing portion.

[0137] FIG. 23D is another perspective view of the fixing portion of the stationary valve disc of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application, wherein the view shows the second sealing groove of the fixing portion.

[0138] FIG. 23E is the fixing portion and the high end portion of the stationary valve disc of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application, wherein the high end portion of the stationary valve disc is provided at the fixing portion.

[0139] FIG. 23F is a perspective view of the first sealing member of the sealing assembly of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application.

[0140] FIG. 23G is a perspective view of the second sealing member of the sealing assembly of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application.

[0141] FIG. 23H is a perspective view of the fixing bracket of the fixing device of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application, wherein the view shows the limiting groove of the fixing bracket.

[0142] FIG. 24A is a perspective view of the stationary valve disc of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application.

[0143] FIG. 24B is a top view of the stationary valve disc of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application.

[0144] FIG. 24C is a bottom view of the stationary valve disc of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application.

[0145] FIG. 24D is a perspective view of the moving valve disc of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application.

[0146] FIG. 24E is a top view of the moving valve disc of the alternative implementation of the flat valve of the water purifier according to the first embodiment of the present application.

[0147] FIG. 24F is a bottom view of the moving valve disc of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present application.

[0148] FIG. 25A is a schematic structural view of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present application, wherein the water purifier shown in the figure is in the first purifying working position, and the arrow in the figure points to the water flow direction.

[0149] FIG. 25B is a schematic structural view of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present application, wherein the water purifier shown in the figure is in the second purifying working position, and the arrow in the figure points to the water flow direction.

[0150] FIG. 25C is a schematic structural view of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present application, wherein the water purifier shown in the figure is in the standby working position.

[0151] FIG. 25D is a schematic structural view of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present application, wherein the water purifier shown in the figure is in the backwashing working position, and the arrow in the figure points to the water flow direction.

[0152] FIG. 26A is a schematic structural view of the fixed valve disc of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present application.

[0153] FIG. 26B is a schematic structural view of the moving valve disc of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present application, wherein the dashed line in the figure shows the through channel of the moving valve disc.

[0154] FIG. 26C is a schematic structural view of the fixed valve disc of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that each channel is arranged at a specific sectional position of the fixed valve disc.

[0155] FIG. 26D is a schematic structural view of the moving valve disc of the alternative embodiment of the flat valve of the water purifier according to the first embodiment of the present application, wherein the figure shows that each channel is arranged at a specific sectional position of the moving valve disc.

[0156] FIG. 27Ais a schematic view of the communication between the passage of the moving valve disc and the passage of the fixed valve disc of the flat valve of the water purifier according to the first embodiment of the present application when it is switched from the standby working position to the first purifying working position or from the first purifying working position to the standby working position, in which the hatched part of the figure shows the mutually communicating passages of the moving valve disc and the fixed valve disc of the flat valve.

[0157] FIG. 27B is a schematic view of the communication between the passage of the moving valve disc and the passage of the fixed valve disc of the flat valve of the water purifier according to the first embodiment of the present application when it is switched from the standby working position to the first purifying working position or from the first purifying working position to the standby working position, in which the hatched part of the figure shows the mutually communicating passages of the moving valve disc and the fixed valve disc of the flat valve.

[0158] FIG. 27C is a schematic view of the communication between the passage of the moving valve disc and the passage of the fixed valve disc of the flat valve of the water purifier according to the first embodiment of the present application when it is switched from the standby working position to the first purifying working position or from the first purifying working position to the standby working position, in which the hatched part of the figure shows the mutually communicating passages of the moving valve disc and the fixed valve disc of the flat valve.

[0159] FIG. 27D is a schematic view of the communication between the passage of the moving valve disc and the passage of the fixed valve disc of the flat valve of the water purifier according to the first embodiment of the present application when it is switched from the standby working position to the first purifying working position or from the first purifying working position to the standby working position, in which the hatched part of the figure shows the mutually communicating passages of the moving valve disc and the fixed valve disc of the flat valve.

[0160] FIG. 27E is a schematic view of the communication between the passage of the moving valve disc and the passage of the fixed valve disc of the flat valve of the water purifier according to the first embodiment of the present application when it is switched from the standby working position to the first purifying working position or from the first purifying working position to the standby working position, in which the hatched part of the figure shows the mutually communicating passages of the moving valve disc and the fixed valve disc of the flat valve.

[0161] FIG. 27F is a schematic view of the communication between the passage of the moving valve disc and the passage of the fixed valve disc of the flat valve of the water purifier according to the first embodiment of the present application when it is switched from the standby working position to the first purifying working position or from the first purifying working position to the standby working position, in which the hatched part of the figure shows the mutually communicating passages of the moving valve disc and the fixed valve disc of the flat valve.

[0162] FIG. 28 is a front view of the water purifier according to the second embodiment of the present application.

[0163] FIG. 29is an assembled view of the water purifier according to the second embodiment of the present application.

[0164] FIG. 30A is an elevation view of the filter assembly of the water purifier according to the second embodiment of the present application.

[0165] FIG. 30B is a sectional view of the filter assembly of the water purifier according to the second embodiment of the present application.

[0166] FIG. 30C is a perspective view of the primary filter cartridge of the filter assembly of the water purifier according to the second embodiment of the present application.

[0167] FIG. 30D is a perspective view of the secondary filter cartridge of the filter assembly of the water purifier according to the second embodiment of the present application.

[0168] FIG. 31A is a perspective view of the base of the filter assembly of the water purifier according to the second embodiment of the present application.

[0169] FIG. 31B is a sectional view of the base of the filter assembly of the water purifier according to the second embodiment of the present application.

[0170] FIG. 31C is another sectional view of the base of the filter assembly of the water purifier according to the second embodiment of the present application.

[0171] FIG. 31D is another sectional view of the base of the filter assembly of the water purifier according to the second embodiment of the present application.

[0172] FIG. 31E is another sectional view of the base of the filter assembly of the water purifier according to the second embodiment of the present application.

[0173] FIG. 32A is a sectional view of the base and the terminal filter cartridge of the filter assembly of the water purifier according to the second embodiment of the present application.

[0174] FIG. 32B is a sectional view of the terminal filter cartridge of the filter assembly of the water purifier according to the second embodiment of the present application.

[0175] FIG. 32C is another sectional view of the terminal filter cartridge of the filter assembly of the water purifier according to the second embodiment of the present application.

[0176] FIG. 33A is a perspective view of the valve body of one alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application, wherein the view shows the first passage, the second passage, the third passage, the fourth passage, the fifth passage and the raw water supply passage.

[0177] FIG. 33B is another perspective view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention, wherein the view shows the first passageway, the second passageway, the third passageway, the fourth passageway, the fifth passageway, the raw water supply passageway, and the second seal.

[0178] FIG. 33C is another perspective view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention, wherein the view shows the first opening, the second opening, the fourth opening, and the fifth opening of the valve body.

[0179] FIG. 33D is another perspective view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention, wherein the view shows the raw water inlet of the valve body.

[0180] FIG. 33E is another perspective view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention, wherein the view shows the third opening and the sixth opening of the valve body.

[0181] FIG. 33F is a top view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention.

[0182] FIG. 33G is a bottom view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention.

[0183] FIG. 34A is a cross-sectional view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention, wherein the view shows the first passageway, the fifth passageway, the first opening, and the fifth opening.

[0184] FIG. 34B is another cross-sectional view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention, wherein the view shows the second passageway, the fourth passageway, the second opening, and the fourth opening.

[0185] FIG. 34C is another cross-sectional view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention, wherein the view shows the third passageway and the third opening.

[0186] FIG. 34D is another cross-sectional view of the valve body of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention, wherein the view shows the raw water supply passageway, the sixth opening, and the raw water inlet.

[0187] FIG. 35A is a cross-sectional view of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present invention.

[0188] FIG. 35B is a perspective view of the flow guide of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application.

[0189] FIG. 35C is a perspective view of the flow guide of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application.

[0190] FIG. 35D is another perspective view of the flow guide of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application.

[0191] FIG. 36A is a perspective view of the fixing device of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application.

[0192] FIG. 36B is a sectional view of the fixing device of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application.

[0193] FIG. 36C is a perspective view of the fixed portion of the stationary valve disc of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application, wherein the first sealing groove of the fixed portion is shown.

[0194] FIG. 36D is another perspective view of the fixed portion of the stationary valve disc of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application, wherein the second sealing groove of the fixed portion is shown.

[0195] FIG. 36E shows the high end portion of the stationary valve disc of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application, wherein the high end portion of the stationary valve disc is provided at the fixed portion of the stationary valve disc.

[0196] FIG. 36F is a perspective view of the first sealing member of the sealing assembly of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application.

[0197] FIG. 36G is a perspective view of the second sealing member of the sealing assembly of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application.

[0198] FIG. 37A is a perspective view of the stationary valve disc of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application.

[0199] FIG. 37B is a top view of the stationary valve disc of the alternative embodiment of the planar valve of the water purifier according to the second embodiment of the present application.

[0200] FIG. 37C is a bottom view of the fixed valve plate of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application.

[0201] FIG. 37D is a perspective view of the moving valve plate of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application.

[0202] FIG. 37E is a top view of the moving valve plate of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application.

[0203] FIG. 37F is a bottom view of the moving valve plate of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application.

[0204] FIG. 38A is a schematic structural view of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application, wherein the water purifier shown in the figure is in the first working position, and the arrow in the figure points to the water flow direction.

[0205] FIG. 38B is a schematic structural view of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application, wherein the water purifier shown in the figure is in the second working position, and the arrow in the figure points to the water flow direction.

[0206] FIG. 38C is a schematic structural view of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application, wherein the water purifier shown in the figure is in the third working position, and the arrow in the figure points to the water flow direction.

[0207] FIG. 39A is a schematic structural view of the fixed valve plate of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application.

[0208] FIG. 39B is a schematic structural view of the moving valve plate of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application, wherein the dashed line in the figure shows the through channel of the moving valve plate.

[0209] FIG. 40A is a schematic view of the communication between the through channel of the moving valve plate and the through channel of the fixed valve plate of the flat valve of the alternative embodiment of the flat valve of the water purifier according to the second embodiment of the present application in the first working position thereof, wherein the shaded part in the figure shows the mutually communicating through channels of the moving valve plate and the fixed valve plate of the flat valve.

[0210] FIG. 40Bis a schematic view of the communication between the passage of the moving valve disc and the passage of the fixed valve disc of the flat valve of the water purifier according to the second embodiment of the present application when the flat valve is in its second working position, wherein the shaded portion in the figure shows the mutually communicating passages of the moving valve disc and the fixed valve disc of the flat valve.

[0211] FIG. 40C is a schematic view of the communication between the passage of the moving valve disc and the passage of the fixed valve disc of the flat valve of the water purifier according to the second embodiment of the present application when the flat valve is in its third working position, wherein the shaded portion in the figure shows the mutually communicating passages of the moving valve disc and the fixed valve disc of the flat valve.

[0212] FIG. 41A is a front view of an alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0213] FIG. 41B is a sectional view of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0214] FIG. 41C is a perspective view of the secondary filter core of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0215] FIG. 41D is a sectional view of the secondary filter core of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0216] FIG. 42A is a perspective view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0217] FIG. 42B is a sectional view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0218] FIG. 42C is another sectional view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0219] FIG. 42D is another sectional view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0220] FIG. 42E is another sectional view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0221] FIG. 43A is a front view of another alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0222] FIG. 43B is a sectional view of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0223] FIG. 43C is a perspective view of the secondary filter cartridge of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0224] FIG. 43D is a sectional view of the secondary filter cartridge of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0225] FIG. 44A is a perspective view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0226] FIG. 44B is a sectional view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0227] FIG. 44C is another sectional view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0228] FIG. 44D is another sectional view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application.

[0229] FIG. 44E is another sectional view of the base of the alternative implementation of the filter device of the water purifier according to the second embodiment of the present application. DETAILED DESCRIPTION

[0230] The following description is presented to enable any person skilled in the art to practice the application as claimed. The preferred embodiments disclosed herein are only examples of the application and alternative embodiments, modifications, improvements, equivalents, and the like can be made thereto without departing from the spirit and scope of the application as set forth in the following claims. The present application is defined by the claims.

[0231] It should be understood by those skilled in the art that, in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0232] It is to be understood that the term "one" is to be understood as "at least one" or "one or more" such that in one embodiment a quantity of one of the elements can be present while in another embodiment a quantity of more than one of the elements can be present. The term "one" or "only one" need not mean that there is only one of the referenced item present. In other words, it is understood that a composition described herein which comprises "one of X" can comprise more than one X.

[0233] Referring to the drawings FIGS. 1A-12F , a water purifier 2 according to a first embodiment of the present application is illustrated, wherein the water purifier 2 comprises a control valve 10K and a filter device 20K, wherein the control valve 10K is disposed between a tap water pipe 3 and the filter device 20K. It is to be understood that the control valve 10K is configured to control the flow of water, such as controlling the provision of raw water (or tap water) to the filter device 20K and controlling the provision of purified water generated or produced by the filter device 20K, which is configured to purify raw water. Further, the control valve 10K is configured to control the amount of raw water flow to the filter device 20K of the water purifier 2 to meet different water usage requirements of a user or different users.

[0234] It is to be noted that the water purifier 2 according to the present application is configured to be used together with a faucet, such as the faucet 1 as shown in FIGS. 1A-1D . At this time, the water purifier 2 according to the present application can be integrated with the faucet 1 so as to facilitate the installation of the water purifier 2 according to the present application with the faucet 1. Therefore, the faucet 1 can be regarded as a part or a component of the water purifier 2 according to the present application.

[0235] As shown in the drawings FIGS. 2B-4D , the filter device 20K of the water purifier 2 according to the first embodiment of the present application comprises a housing 21K, a primary filter element 22K and a secondary filter element 23K, wherein the housing 21K forms a first receiving cavity 210K, wherein the primary filter element 22K and the secondary filter element 23K are both disposed in the first receiving cavity 210K of the housing 21K, and the housing 21K and the primary filter element 22K form a raw water passage 2101K therebetween, the primary filter element 22K and the secondary filter element 23K form a purified water passage 2201K therebetween, and the secondary filter element 23K has a purified water outlet 2301K. Further, the purified water passage 2201K is located at one side of the secondary filter element 23K, and the purified water outlet 2301K is formed at an opposite side of the secondary filter element 23K.

[0236] As shown in the drawings FIGS. 2B-4DAs shown, further, the first filter element 22K of the filter device 20K of the water purifier 2 according to the first embodiment of the present application forms a second accommodating cavity 220K, and the second filter element 23K is arranged in the second accommodating cavity 220K of the first filter element 22K (correspondingly, the purified water passage 2201K can be regarded as a part of the second accommodating cavity 220K). Correspondingly, since the second filter element 23K is arranged in the second accommodating cavity 220K of the first filter element 22K, when raw water flows from the raw water passage 2101K into the first filter element 22K under the action of water pressure and is treated by the first filter element 22K, the purified water generated by the first filter element 22K can flow to the second filter element 23K under the action of water pressure and be treated by the second filter element 23K to obtain second purified water which is cleaner, and the second purified water flows out of the purified water outlet 2301K under the action of water pressure to be provided. Preferably, the first filter element 22K is a ceramic filter element, and the second filter element 23K is an external pressure type ultrafiltration filter element, wherein the ultrafiltration membrane wire 231K of the second filter element 23K is arranged in the second accommodating cavity 220K of the first filter element 22K, so that the purified water passage 2201K is formed between the ultrafiltration membrane wire 231K of the second filter element 23K and the first filter element 22K. Therefore, the purified water generated by the first filter element 22K can be further treated by the second filter element 23K under the action of water pressure to obtain second purified water (or ultrafiltration filtered water) which is cleaner. It can be understood that the first filter element 22K can also be a filter element made of other materials or a composite filter element made of multiple materials, for example, a composite filter element composed of any two or more of ceramic, carbon fiber, PP cotton and activated carbon particles.

[0237] As shown in the drawings FIG. 1A 、 FIGS. 2B-4D and FIGS. 10A-10BAs shown, the filter device 20K of the water purifier 2 according to the first embodiment of the present application has a first communication opening 201K, a second communication opening 202K and a third communication opening 203K, wherein the first communication opening 201K of the filter device 20K is in communication with the raw water channel 2101K of the filter device 20K, so that the control valve 10K can provide raw water to the filter device 20K through the first communication opening 201K, the second communication opening 202K of the filter device 20K is in communication with the purified water channel 2201K, so that the purified water produced by the first-stage filter element 22K in processing raw water can flow to a second water outlet 200K of the water purifier 2 under the control of the control valve 10K and be provided to a user, and the third communication opening 203K of the filter device 20K is in communication with the purified water outlet 2301K of the second-stage filter element 23K, so that the purified water produced by the second-stage filter element 23K can flow out through the third communication opening 203K and be provided to a user through a first water outlet 100K of the water purifier 2 under the control of the control valve 10K. Preferably, the second-stage filter element 23K of the filter device 20K of the water purifier 2 is an external pressure type ultrafiltration filter element. Correspondingly, each ultrafiltration membrane filament 231K of the second-stage filter element 23K forms a membrane filament channel 2310K, and the membrane filament channels 2310K of the ultrafiltration membrane filaments 231K are all in communication with the purified water outlet 2301K of the second-stage filter element 23K, so that the purified water produced by each ultrafiltration membrane filament 231K of the second-stage filter element 23K can flow to the third communication opening 203K of the filter device 20K under the action of water pressure.

[0238] As shown in the accompanying drawings FIG. 1A 、 FIGS. 2B-4D and FIGS. 10A-10BAs shown, correspondingly, when the filter device 20K of the water purifier 2 according to the first embodiment of the present application is used to treat raw water, the user can control the raw water to flow to the first communication opening 201K of the filter device 20K through the control valve 10K, the raw water flows to the raw water passage 2101K of the filter device 20K under the action of water pressure, the raw water is treated by the primary filter element 22K under the action of water pressure, the generated purified water flows to the water purifying passage 2201K, at this time, if the purified water in the water purifying passage 2201K cannot freely flow through the second communication opening 202K of the filter device 20K under the control of the control valve 10K, while the purified water generated by the secondary filter element 23K can freely flow to the third communication opening 203K, the purified water generated by the primary filter element 22K will be further purified by the secondary filter element 23K under the action of water pressure, and the purified water generated by the secondary filter element 23K will flow out of and be provided from the third communication opening 203K. Correspondingly, at this time, the water purifier 2 according to the first embodiment of the present application is in a first purification working state. On the other hand, if the purified water in the water purifying passage 2201K can freely flow through the second communication opening 202K of the filter device 20K under the control of the control valve 10K, while the purified water generated by the secondary filter element 23K cannot freely flow to the third communication opening 203K, the purified water generated by the primary filter element 22K will flow out of and be provided from the second communication opening 202K under the action of water pressure. Correspondingly, at this time, the water purifier 2 according to the first embodiment of the present application is in a second purification working state.

[0239] As shown in FIGS. 1 to 3, FIG. 1A 、 FIGS. 2B-4D and FIG. 10D As shown, further, the water purifier 2 according to the first embodiment of the present application also has a backwashing working state, wherein when the water purifier 2 according to the present application is in the backwashing working state, the user can control the raw water to flow to the second communication opening 202K of the filter device 20K through the control valve 10K, the raw water flows to the water purifying passage 2201K of the filter device 20K from the second communication opening 202K under the action of water pressure, at this time, the purified water generated by the secondary filter element 23K cannot freely flow to the third communication opening 203K under the control of the control valve 10K, the raw water in the water purifying passage 2201K reversely washes the primary filter element 22K under the action of water pressure, the generated sewage flows to the first communication opening 201K of the filter device 20K from the raw water passage 2101K under the action of water pressure, and flows out of the first communication opening 201K under the control of the control valve 10K. It can be understood that the backwashing herein refers to that when the primary filter element 22K is washed, the flow direction of the raw water flowing through the primary filter element 22K is opposite to the flow direction of the raw water flowing through the primary filter element 22K when the primary filter element 22K purifies the raw water.

[0240] As shown in the accompanying drawings FIG. 10C Further, the water purifier 2 according to the first embodiment of the present application also has a standby working state, wherein when the water purifier 2 according to the present application is in the standby working state, the user can control the raw water not to flow to the filtering device 20K through the control valve 10K.

[0241] Noteably, when the secondary filter element 23K of the filter device 20K of the water purifier 2 of the present application is an outer pressure type ultrafiltration filter element, and the purified water produced by the primary filter element 22K can flow out of the second communication opening 202K of the filter device 20K freely, when the purified water produced by the primary filter element 22K flows out of the second communication opening 202K of the filter device 20K, the purified water produced by the primary filter element 22K will flow through the ultrafiltration membrane filaments 231K of the secondary filter element 23K, so that the ultrafiltration membrane filaments 231K of the secondary filter element 23K are washed by the purified water produced by the primary filter element 22K. In other words, at this time, the filter device 20K of the water purifier 2 of the present application allows the purified water produced by the primary filter element 22K to be provided while further using the purified water produced by the primary filter element 22K to clean the ultrafiltration membrane filaments 231K of the secondary filter element 23K. As known by those skilled in the art, a faucet water purifier directly installed on a tap water faucet is small in size due to the limitation of the space where it is used. When the faucet water purifier uses an ultrafiltration filter element, especially an ultrafiltration filter element with ultrafiltration membrane filaments as the main filter element, the ultrafiltration filter element is easy to smell and cannot be used continuously because of the aggregation of impurities such as microorganisms on the surface of the ultrafiltration membrane filaments of the ultrafiltration filter element. The filter device 20K of the water purifier 2 of the present application allows the purified water produced by the primary filter element 22K to be provided while further using the purified water produced by the primary filter element 22K to clean the surface of the ultrafiltration membrane filaments 231K of the secondary filter element 23K, thereby preventing the aggregation of impurities such as microorganisms in tap water on the secondary filter element 23K and preventing the secondary filter element 23K from smelling and being unable to be used continuously. In other words, the water purifier 2 of the present application solves the problem of the aggregation of impurities that cannot be discharged in time and causes odor when a conventional faucet water purifier uses an ultrafiltration filter element (or ultrafiltration membrane filaments) to filter water through the ingenious structural design of the filter device 20K of the water purifier 2, so that the ultrafiltration membrane filaments 231K of the secondary filter element 23K have better filtering effect and prolong the service life of the secondary filter element 23K. More importantly, since the faucet water purifier is small in size, according to the structure of the conventional faucet water purifier, when it uses an ultrafiltration filter element to treat raw water such as tap water, it will be blocked in a short time. The flushing effect of the ultrafiltration membrane filaments 231K of the secondary filter element 23K by the purified water produced by the primary filter element 22K of the water purifier 2 of the present application significantly improves the problem of the aggregation of impurities that cannot be discharged in time when a conventional faucet water purifier uses an ultrafiltration filter element (or ultrafiltration membrane filaments) to filter water, so that it is possible for a faucet water purifier to use an ultrafiltration filter element to filter and treat water. The greater significance of the water purifier 2 of the present application is that it can enable consumers to get rid of the conventional table-type water purifier which is large in size and expensive. In addition, since the primary filter element 22K of the water purifier 2 of the present application is preferably a ceramic filter element, the purified water filtered by the primary filter element 22K is not suitable for direct drinking, but it has undergone preliminary filtering and purifying treatment on raw water, and can be used for washing vegetables, washing and the like.

[0242] As shown in the drawingsFIGS. 2B-4D As shown, the filtration device 20K of the water purifier 2 according to the first embodiment of the present invention further includes a base 24K, wherein the secondary filter element 23K is disposed on the base 24K, and the base 24K forms a first water chamber 2401K, wherein the first water chamber 2401K of the base 24K is connected to the third communication opening 203K of the filtration device 20K and the purified water outlet 2301K of the secondary filter element 23K. In other words, the membrane fiber channel 2310K of the ultrafiltration membrane fiber 231K of the secondary filter element 23K is connected to the first water chamber 2401K of the base 24K and the third communication opening 203K of the filtration device 20K through the purified water outlet 2301K of the secondary filter element 23K, so that the secondary purified water produced by the secondary filter element 23K can flow out from the third communication opening 203K. Preferably, the third connecting opening 203K is disposed on the base 24K. More preferably, the secondary filter element 23K is watertightly disposed on the base 24K, and the first water chamber 2401K is formed between the secondary filter element 23K and the base 24K.

[0243] As shown in the attached image. FIGS. 2B-4D As shown, in the first embodiment of the water purifier 2 according to the present invention, the primary filter element 22K of the filtration device 20K is disposed on the base 24K, and the base 24K further forms a second water chamber 2402K, wherein the second water chamber 2402K of the base 24K is connected to the second communication opening 202K and the purified water channel 2201K of the filtration device 20K respectively. In other words, the purified water channel 2201K of the filtration device 20K is connected to the second communication opening 202K of the filtration device 20K through the second water chamber 2402K of the base 24K, so that the purified water produced by the primary filter element 22K can flow out from the second communication opening 202K. It is understood that when the control valve 10K of the water purifier 2 of the present invention controls the backwashing of the primary filter element 22K with raw water, raw water flows into the filter device 20K from the second connecting opening 202K, and flows into the purified water channel 2201K of the filter device 20K through the second water chamber 2402K of the base 24K. Under the action of water pressure, the raw water backwashes the primary filter element 22K, and the generated wastewater flows from the raw water channel 2101K to the first connecting opening 201K of the filter device 20K under the action of water pressure. Preferably, the second connecting opening 202K is located on the base 24K.

[0244] As shown in the attached image. FIGS. 2B-4DAs shown, the first filter element 22K of the filter device 20K of the water purifier 2 according to the first embodiment of the present application is water-tightly arranged in the base 24K to prevent raw water in the raw water passage 2101K from flowing into the purified water passage 2201K. Further, the first filter element 22K is detachably arranged in the base 24K so that the first filter element 22K can be replaced. Alternatively, the first filter element 22K is water-tightly arranged in the housing 21K so that raw water can only flow in the raw water passage 2101K. Alternatively, the first filter element 22K is detachably arranged in the housing 21K. Alternatively, the first filter element 22K is integrally arranged in the base 24K. Alternatively, the first filter element 22K is integrally arranged in the housing 21K.

[0245] As shown in FIG. 1, the filter device 20K of the water purifier 2 according to the first embodiment of the present application comprises a housing 21K, a first filter element 22K, a second filter element 23K, and a base 24K. The housing 21K has a first water cavity 2401K and a second water cavity 2402K. The first filter element 22K is arranged in the first water cavity 2401K. The second filter element 23K is arranged in the second water cavity 2402K. The base 24K is arranged in the first water cavity 2401K and the second water cavity 2402K. FIGS. 2B-4D As shown, the second filter element 23K of the filter device 20K of the water purifier 2 according to the first embodiment of the present application further comprises a housing 232K, wherein the ultrafiltration membrane filaments 231K of the second filter element 23K are arranged in the housing 232K, and the housing 232K has at least one water inlet 2320K, wherein the water inlet 2320K of the housing 232K communicates the inside and outside of the housing 232K, so that when the water purifier 2 according to the first embodiment of the present application is in the first purification working state, the purified water generated by the first filter element 22K can flow to the ultrafiltration membrane filaments 231K through the water inlet 2320K of the housing 232K under the action of water pressure. Therefore, the water inlet 2320K of the housing 232K of the second filter element 23K can be regarded as part of the purified water passage 2201K of the filter device 20K.

[0246] As shown in FIG. 1, the filter device 20K of the water purifier 2 according to the first embodiment of the present application comprises a housing 21K, a first filter element 22K, a second filter element 23K, and a base 24K. The housing 21K has a first water cavity 2401K and a second water cavity 2402K. The first filter element 22K is arranged in the first water cavity 2401K. The second filter element 23K is arranged in the second water cavity 2402K. The base 24K is arranged in the first water cavity 2401K and the second water cavity 2402K. FIGS. 2B-4D As shown, the base 24K of the filter device 20K of the water purifier 2 according to the first embodiment of the present application comprises a base portion 241K and a first spacing portion 242K, wherein the first spacing portion 242K is arranged in the base portion 241K and extends from the base portion 241K, wherein the first spacing portion 242K is arranged between the first water cavity 2401K and the second water cavity 2402K, thereby separating the first water cavity 2401K and the second water cavity 2402K from each other. Preferably, the base 24K further comprises a second spacing portion 243K arranged in the base portion 241K and extending from the base portion 241K, wherein the second water cavity 2402K is arranged between the first spacing portion 242K and the second spacing portion 243K, and the first spacing portion 242K forms the first water cavity 2401K. More preferably, the first spacing portion 242K and the second spacing portion 243K are both annular, and the second spacing portion 243K is arranged outside the first spacing portion 242K.

[0247] As shown in FIG. 1, the filter device 20K of the water purifier 2 according to the first embodiment of the present application comprises a housing 21K, a first filter element 22K, a second filter element 23K, and a base 24K. The housing 21K has a first water cavity 2401K and a second water cavity 2402K. The first filter element 22K is arranged in the first water cavity 2401K. The second filter element 23K is arranged in the second water cavity 2402K. The base 24K is arranged in the first water cavity 2401K and the second water cavity 2402K. FIGS. 2B-4DAs shown, according to the first embodiment of the present invention, the water purification channel 2201K of the filter device 20K, the second water chamber 2402K of the base 24K, and the second connecting opening 202K of the filter device 20K form a primary water purification path. The membrane fiber channel 2310K of the ultrafiltration membrane fiber 231K of the secondary filter element 23K, the water purification outlet 2301K of the secondary filter element 23K, the first water chamber 2401K of the base 24K, and the third connecting opening 203K of the filter device 20K form a secondary water purification path. It can be understood that the primary water purification path and the secondary water purification path are separated from each other to prevent the water phases in the primary and secondary water purification paths from mixing. In other words, the primary and secondary water purification paths are separated from each other to prevent the purified water produced by the primary filter element 22K from mixing with the purified water produced by the secondary filter element 23K.

[0248] As shown in the attached image. FIGS. 2B-4D As shown, in the first embodiment of the water purifier 2 according to the present invention, the first communication opening 201K of the filter device 20K is preferably provided on the base 24K. Optionally, the first communication opening 201K of the filter device 20K is provided on the outer casing 21K. (See attached figures) FIGS. 2B-4D As shown, in the first embodiment of the water purifier 2 according to the present invention, the outer shell 21K of the filter device 20K is preferably disposed at the edge of the base 24K. Preferably, the outer shell 21K and the base 24K are integrally formed.

[0249] As shown in the attached image. FIGS. 2B-4D As shown, the base 24K of the water purifier 2 according to the first embodiment of the present invention further has a conductive part 246K, wherein the conductive part 246K has a first conductive channel 2461K, a second conductive channel 2462K and a third conductive channel 2463K, wherein the first conductive channel 2461K is configured to communicate with the first connecting opening 201K and the raw water channel 2101K respectively, the second conductive channel 2462K is configured to communicate with the second connecting opening 202K and the second water cavity 2402K respectively, and the third conductive channel 2463K is configured to communicate with the third connecting opening 203K and the first water cavity 2401K respectively. Preferably, the first conductive channel 2461K is disposed between the first connecting opening 201K and the raw water channel 2101K, the second conductive channel 2462K is disposed between the second connecting opening 202K and the second water cavity 2402K, and the third conductive channel 2463K is disposed between the third connecting opening 203K and the first water cavity 2401K.

[0250] As shown in the attached image. FIGS. 2B-3DAs shown, further, the filter device 20K of the water purifier 2 according to the first embodiment of the present application further comprises a brush 26K, wherein the brush 26K comprises a brush body 261K, wherein the brush body 261K is rotatably arranged between the housing 21K and the primary filter element 22K, such that when the brush body 261K is rotated, the brush body 261K is capable of brushing the outer surface of the primary filter element 22K facing the housing 21K. Further, the brush body 261K of the brush 26K of the filter device 20K comprises a brush holder 2611K and a set of brush hairs 2612K, wherein the brush hairs 2612K of the brush body 261K of the brush 26K are arranged on the brush holder 2611K, and the brush hairs 2612K are arranged facing the primary filter element 22K, such that when the brush body 261K is rotated, the brush hairs 2612K are capable of brushing the outer surface of the primary filter element 22K. It is appreciated that when the primary filter element 22K of the filter device 20K of the water purifier 2 according to the present application is back-flushed, the brush body 261K is rotated, such that the outer surface of the primary filter element 22K facing the housing 21K is cleaned. In other words, the brush 26K in combination with the back-flushing of the primary filter element 22K of the filter device 20K of the water purifier 2 according to the present application is capable of effectively back-flushing the primary filter element 22K of the filter device 20K of the water purifier 2 according to the present application, such that the service life of the filter device 20K of the water purifier 2 according to the present application is improved.

[0251] As shown in FIG. 1, FIGS. 2B-3D As shown, the brush 26K of the filter device 20K of the water purifier 2 according to the first embodiment of the present application further comprises an operation end 262K arranged on the brush holder 2611K, and the housing 21K of the filter device 20K comprises an operation hole 211K, wherein the operation end 262K extends from the brush holder 2611K and passes through the operation hole 211K of the housing 21K, such that a user is capable of rotating the operation end 262K by a driving mechanism, such as a knob, a rotating handle, etc., such that the brush body 261K is driven to rotate along the outer surface of the primary filter element 22K. It is appreciated that the operation end 262K extends from the brush holder 2611K and passes through the operation hole 211K of the housing 21K.

[0252] As shown in FIG. 1, FIG. 2A , FIGS. 5A-12FAs shown in the drawings, the control valve 10K of the water purifier 2 according to the first embodiment of the present application comprises a valve body 11K and a valve core 12K, wherein the valve body 11K forms a valve cavity 110K, a first opening 1101K, a second opening 1102K, a third opening 1103K, a fourth opening 1104K, a fifth opening 1105K, a raw water inlet 1106K and a blowdown opening 1109K, and the valve core 12K is arranged in the valve cavity 110K, wherein the first opening 1101K of the valve body 11K is adapted to be communicated with the first communication opening 201K of the filter device 20K, the second opening 1102K of the valve body 11K is adapted to be communicated with the second communication opening 202K of the filter device 20K, the fourth opening 1104K of the valve body 11K is adapted to be communicated with the third communication opening 203K of the filter device 20K, the fifth opening 1105K of the valve body 11K is adapted to be communicated with a first water outlet 100K, the third opening 1103K of the valve body 11K is adapted to be communicated with a second water outlet 200K, and the raw water inlet 1106K of the valve body 11K is adapted to be communicated with a raw water source.

[0253] As shown in the drawings, the control valve 10K of the water purifier 2 according to the first embodiment of the present application comprises a valve body 11K and a valve core 12K, wherein the valve body 11K forms a valve cavity 110K, a first opening 1101K, a second opening 1102K, a third opening 1103K, a fourth opening 1104K, a fifth opening 1105K, a raw water inlet 1106K and a blowdown opening 1109K, and the valve core 12K is arranged in the valve cavity 110K, wherein the first opening 1101K of the valve body 11K is adapted to be communicated with the first communication opening 201K of the filter device 20K, the second opening 1102K of the valve body 11K is adapted to be communicated with the second communication opening 202K of the filter device 20K, the fourth opening 1104K of the valve body 11K is adapted to be communicated with the third communication opening 203K of the filter device 20K, the fifth opening 1105K of the valve body 11K is adapted to be communicated with a first water outlet 100K, the third opening 1103K of the valve body 11K is adapted to be communicated with a second water outlet 200K, and the raw water inlet 1106K of the valve body 11K is adapted to be communicated with a raw water source. FIGS. 1A-1D As shown in the drawings, the control valve 10K of the water purifier 2 according to the first embodiment of the present application comprises a valve body 11K and a valve core 12K, wherein the valve body 11K forms a valve cavity 110K, a first opening 1101K, a second opening 1102K, a third opening 1103K, a fourth opening 1104K, a fifth opening 1105K, a raw water inlet 1106K and a blowdown opening 1109K, and the valve core 12K is arranged in the valve cavity 110K, wherein the first opening 1101K of the valve body 11K is adapted to be communicated with the first communication opening 201K of the filter device 20K, the second opening 1102K of the valve body 11K is adapted to be communicated with the second communication opening 202K of the filter device 20K, the fourth opening 1104K of the valve body 11K is adapted to be communicated with the third communication opening 203K of the filter device 20K, the fifth opening 1105K of the valve body 11K is adapted to be communicated with a first water outlet 100K, the third opening 1103K of the valve body 11K is adapted to be communicated with a second water outlet 200K, and the raw water inlet 1106K of the valve body 11K is adapted to be communicated with a raw water source.

[0254] As shown in the drawings, the control valve 10K of the water purifier 2 according to the first embodiment of the present application comprises a valve body 11K and a valve core 12K, wherein the valve body 11K forms a valve cavity 110K, a first opening 1101K, a second opening 1102K, a third opening 1103K, a fourth opening 1104K, a fifth opening 1105K, a raw water inlet 1106K and a blowdown opening 1109K, and the valve core 12K is arranged in the valve cavity 110K, wherein the first opening 1101K of the valve body 11K is adapted to be communicated with the first communication opening 201K of the filter device 20K, the second opening 1102K of the valve body 11K is adapted to be communicated with the second communication opening 202K of the filter device 20K, the fourth opening 1104K of the valve body 11K is adapted to be communicated with the third communication opening 203K of the filter device 20K, the fifth opening 1105K of the valve body 11K is adapted to be communicated with a first water outlet 100K, the third opening 1103K of the valve body 11K is adapted to be communicated with a second water outlet 200K, and the raw water inlet 1106K of the valve body 11K is adapted to be communicated with a raw water source. FIGS. 1A-1D As shown in the drawings, the control valve 10K of the water purifier 2 according to the first embodiment of the present application comprises a valve body 11K and a valve core 12K, wherein the valve body 11K forms a valve cavity 110K, a first opening 1101K, a second opening 1102K, a third opening 1103K, a fourth opening 1104K, a fifth opening 1105K, a raw water inlet 1106K and a blowdown opening 1109K, and the valve core 12K is arranged in the valve cavity 110K, wherein the first opening 1101K of the valve body 11K is adapted to be communicated with the first communication opening 201K of the filter device 20K, the second opening 1102K of the valve body 11K is adapted to be communicated with the second communication opening 202K of the filter device 20K, the fourth opening 1104K of the valve body 11K is adapted to be communicated with the third communication opening 203K of the filter device 20K, the fifth opening 1105K of the valve body 11K is adapted to be communicated with a first water outlet 100K, the third opening 1103K of the valve body 11K is adapted to be communicated with a second water outlet 200K, and the raw water inlet 1106K of the valve body 11K is adapted to be communicated with a raw water source.

[0255] FIGS. 1A-1D ​As shown, the connecting pipe 70 of the water purifier 2 according to the first embodiment of the present application further forms a first connecting end 71, a second connecting end 72 and a third connecting end 73, wherein the first connecting end 71 of the connecting pipe 70 forms the first conducting opening 710, the second connecting end 72 forms the second conducting opening 720, and the third connecting end 73 forms the third conducting opening 730, wherein the control valve 10K is connected to the first connecting end 71 of the connecting pipe 70, and the faucet 1 is connected to the second connecting end 72 of the connecting pipe 70. In other words, the control valve 10K and the faucet 1 respectively obtain raw water through the raw water channel 701, and the flow of raw water to the filtering device 20K is not controlled by the faucet 1. Accordingly, the faucet 1, the water purifier 2 and the connecting pipe 70 can be regarded as forming a three-way structure. Preferably, the water purifier 2 and the faucet 1 of the present application are integrated together through the connecting pipe 70, and are connected to the water pipe 3 through the connecting pipe 70. Therefore, the water purifier 2 of the present application can be regarded as a faucet water purifier with the function of controlling the flow of raw water, which can be integrated with the faucet 1. In addition, since the water purifier 2 and the faucet 1 of the present application are integrated together through the connecting pipe 70, the faucet 1 can be regarded as an element or component of the water purifier 2 of the present application. Preferably, the cold water pipe 16 and the connecting pipe 70 are integrally formed. As shown in FIG. 1, FIGS. 1A-1D As shown, the faucet 1 of the water purifier 2 according to the first embodiment of the present application preferably further comprises a hot water pipe 18. In some embodiments, the faucet 1 is an electric heating faucet.

[0256] As shown in FIG. 1, FIG. 7C and FIG. 7F As shown, the water purifier 2 according to the first embodiment of the present application further comprises a sealing gasket 17, wherein the sealing gasket 17 is arranged between the connecting pipe 70 and the control valve 10K to achieve sealing between the connecting pipe 70 and the control valve 10K. As shown in FIG. 1, FIG. 1A , FIG. 2A FIG. 7C and FIG. 7F As shown, the water purifier 2 according to the first embodiment of the present application further comprises a first water outlet elbow 91 and a second water outlet elbow 92, wherein the first water outlet elbow 91 is connected to the fifth opening 1105K of the control valve 10K, so that the secondary purified water generated by the secondary filter element 23K of the filtering device 20K can be provided from the first water outlet elbow 91, and the second water outlet elbow 92 is connected to the third opening 1103K of the control valve 10K, so that the purified water generated by the primary filter element 22K of the filtering device 20K can be provided from the second water outlet elbow 92. Preferably, the first water outlet 100K is formed by the first water outlet elbow 91 of the water purifier 2, and the second water outlet 200K is formed by the second water outlet elbow 92.

[0257] As shown in the attached image. FIGS. 5A-6F and FIG. 10A As shown, the control valve 10K of the water purifier 2 according to the first embodiment of the present invention has a first purification working position. When the control valve 10K is in the first purification working position, the valve core 12K of the control valve 10K forms a first connecting channel 1001K and a second connecting channel 1002K. The first connecting channel 1001K is connected to the first opening 1101K and the raw water inlet 1106K of the valve body 11K, respectively. The second connecting channel 1002K is connected to the fourth opening 1104K and the fifth opening 1105K of the valve body 11K, respectively. Further, when the control valve 10K is in the first purification working position, the second opening 1102K and the third opening 1103K of the valve body 11K are not connected. In other words, when the control valve 10K is in the first purification working position, the second opening 1102K and the third opening 1103K of the valve body 11K cannot be connected. Correspondingly, when the control valve 10K is in the first purification working position, raw water or tap water flows in from the raw water inlet 1106K of the valve body 11K of the control valve 10K under water pressure, flows through the first connecting channel 1001K to the first opening 1101K of the valve body 11K, and then further flows into the raw water channel 2101K of the filter device 20K from the first connecting opening 201K. The raw water flowing into the raw water channel 2101K is filtered by the first-stage filter element 22K, and the resulting purified water flows into the purified water channel 2201K. Furthermore, when the control valve 10K is in the first purification working position, the second opening 1102K and the third opening 1103K of the valve body 11K cannot communicate, thus preventing the purified water in the purified water channel 2201K from flowing freely through the second connecting opening 202K of the filter device 20K under the control of the control valve 10K. Therefore, the purified water produced by the primary filter element 22K will be further purified by the secondary filter element 23K. The purified water produced by the secondary filter element 23K flows out through the purified water outlet 2301K from the third connecting opening 203K, and flows sequentially through the fourth opening 1104K, the second connecting channel 1002K, and the fifth opening 1105K, so that the purified water produced by the secondary filter element 23K can be provided through the first outlet 100K connected to the fifth opening 1105K. Preferably, the secondary filter element 23K is an ultrafiltration filter element. Accordingly, the purified water produced by the secondary filter element 23K is drinkable. It can be understood that when the control valve 10K of the water purifier 2 according to the first embodiment of the present invention is controlled to be in the first purification working position, the water purifier 2 of the present invention is controlled to be in its first purification working state.

[0258] As shown in the attached image. FIGS. 5A-6F and FIG. 10BAs shown, the control valve 10K of the water purifier 2 according to the first embodiment of the present application further has a second purification working position, wherein when the control valve 10K is in the second purification working position, the valve core 12K of the control valve 10K forms a third communication passage 1003K and a fourth communication passage 1004K, wherein the third communication passage 1003K is in communication with the first opening 1101K and the raw water inlet 1106K of the valve body 11K respectively, and the fourth communication passage 1004K is in communication with the second opening 1102K and the third opening 1103K of the valve body 11K respectively. Further, when the control valve 10K is in the second purification working position, the fourth opening 1104K and the fifth opening 1105K of the valve body 11K are not in communication. In other words, when the control valve 10K is in the second purification working position, the fourth opening 1104K and the fifth opening 1105K of the valve body 11K cannot be in communication. Accordingly, when the control valve 10K is in the second purification working position, raw water or tap water flows into the valve body 11K of the control valve 10K from the raw water inlet 1106K under the action of water pressure, flows to the first opening 1101K of the valve body 11K through the third communication passage 1003K, and further flows into the raw water passage 2101K of the filter device 20K from the first communication opening 201K of the filter device 20K. The raw water flowing into the raw water passage 2101K is filtered by the primary filter element 22K, and the purified water produced by the primary filter element 22K flows into the purified water passage 2201K. At this time, since the second opening 1102K and the third opening 1103K of the valve body 11K are in communication through the fourth communication passage 1004K, the purified water produced by the primary filter element 22K flows into the purified water passage 2201K, flows out from the second communication opening 202K, and flows through the second opening 1102K, the fourth communication passage 1004K and the third opening 1103K in sequence, so that the purified water produced by the primary filter element 22K can be provided through the second water outlet 200K connected with the third opening 1103K. It can be understood that when the control valve 10K of the water purifier 2 according to the first embodiment of the present application is controlled to be in the second purification working position, the water purifier 2 according to the first embodiment of the present application is controlled to be in the second purification working state.

[0259] As shown in the drawings FIGS. 5A-6F and FIG. 10CAs shown, the control valve 10K of the water purifier 2 according to the first embodiment of the present invention further has a standby working position, wherein when the water purifier 2 is in the standby working position, the control valve 10K controls the raw water not to flow to the filter device 20K and also does not provide raw water or purified water to the user. Further, when the control valve 10K is in the standby working position, the raw water inlet 1106K is not connected to the first opening 1101K, the second opening 1102K, the third opening 1103K, the fourth opening 1104K, and the fifth opening 1105K. It can be understood that when the control valve 10K of the water purifier 2 according to the first embodiment of the present invention is controlled to be in the standby working position, the water purifier 2 is controlled to be in its standby working state.

[0260] As shown in the attached image. FIGS. 5A-6F and FIG. 10D As shown, the control valve 10K of the water purifier 2 according to the first embodiment of the present invention further has a backwashing working position, wherein when the control valve 10K is in the backwashing working position, the valve core 12K of the control valve 10K forms a fifth connecting channel 1005K and a sixth connecting channel 1006K, wherein the fifth connecting channel 1005K is connected to the second opening 1102K and the raw water inlet 1106K of the valve body 11K respectively, and the sixth connecting channel 1006K is connected to the first opening 1101K and the sewage outlet 1109K of the valve body 11K respectively. Correspondingly, when the control valve 10K is in the backwashing working position, raw water or tap water flows in from the raw water inlet 1106K of the valve body 11K of the control valve 10K under water pressure, flows through the fifth connecting channel 1005K to the second opening 1102K of the valve body 11K, and further flows into the filter device 20K from the second connecting opening 202K. Under water pressure, the raw water flows into the primary filter element 22K from the clean water channel 2201K of the filter device 20K. After backwashing the primary filter element 22K, the generated sewage flows into the raw water channel 2101K. At this time, since the first opening 1101K and the drain opening 1109K of the valve body 11K are connected through the sixth connecting channel 1006K, the wastewater generated by the backwashing of the primary filter element 22K by the raw water flows into the raw water channel 2101K and then flows out from the first connecting opening 201K, and sequentially flows through the first opening 1101K, the sixth connecting channel 1006K, and the drain opening 1109K, so that the wastewater generated by the backwashing of the primary filter element 22K by the raw water can be discharged through the drain opening 1109K. It can be understood that when the control valve 10K of the water purifier 2 according to the first embodiment of the present invention is controlled to be in the backwashing working position, the water purifier 2 of the present invention is controlled to be in its backwashing working state.

[0261] As shown in the attached image.FIGS. 8A-12F As shown, according to the first embodiment of the present invention, the control valve 10K of the water purifier 2 is a planar valve, wherein the valve core 12K of the planar valve 10K further includes a fixed valve plate 121K and a movable valve plate 122K, wherein the fixed valve plate 121K has a first fluid control surface 1210K, and the movable valve plate 122K has a second fluid control surface 1220K, wherein both the movable valve plate 122K and the fixed valve plate 121K are disposed in the valve cavity 110K, wherein the second fluid control surface 1220K of the movable valve plate 122K is disposed on the first fluid control surface 1210K of the fixed valve plate 121K, and the movable valve plate 122K is configured to be rotatable relative to the fixed valve plate 121K. Preferably, the raw water inlet 1106K is connected to the valve cavity 110K of the valve body 11K.

[0262] As shown in the attached image. FIGS. 5A-12F As shown, the planar valve 10K of the water purifier 2 according to the first embodiment of the present invention has a first channel 101K, a second channel 102K, a third channel 103K, a fourth channel 104K, a fifth channel 105K, a sixth channel 106K, and a seventh channel 107K, wherein the first channel 101K, the second channel 102K, the third channel 103K, the fourth channel 104K, and the fifth channel 105K are respectively disposed on the fixed valve plate 121K and extend from the first fluid control surface 1210K of the fixed valve plate 121K; the sixth channel... Channel 106K and the seventh channel 107K are respectively disposed on the movable valve plate 122K and extend from the second fluid control surface 1220K of the movable valve plate 122K. The first channel 101K communicates with the first opening 1101K, the second channel 102K communicates with the second opening 1102K, the third channel 103K communicates with the third opening 1103K, the fourth channel 104K communicates with the fourth opening 1104K, the fifth channel 105K communicates with the fifth opening 1105K, and the sixth channel 106K communicates with the raw water inlet 1106K. Preferably, the raw water inlet 1106K and the sixth channel 106K are respectively connected to the valve chamber 110K, thereby connecting the sixth channel 106K with the raw water inlet 1106K. More preferably, the seventh channel 107K of the movable valve plate 122K is preferably a blind orifice.

[0263] As shown in the attached image. FIG. 10A and FIGS. 12A-12BAs shown, the movable valve disc 122K of the flat valve 10K of the water purifier 2 according to the first embodiment of the present application is capable of rotating relative to the fixed valve disc 121K, so that the flat valve 10K has a first purifying working position. When the flat valve 10K of the water purifier 2 according to the first embodiment of the present application is in the first purifying working position, the sixth passage 106K of the flat valve 10K is in communication with the first passage 101K, so as to form the first communication passage 1001K in communication with the raw water inlet 1106K and the first opening 1101K respectively, and the seventh passage 107K is in communication with the fourth passage 104K and the fifth passage 105K respectively, so as to form the second communication passage 1002K in communication with the fourth opening 1104K and the fifth opening 1105K respectively. As shown in FIG. 1, when the flat valve 10K is in the first purifying working position, the second passage 102K and the third passage 103K of the flat valve 10K are blocked (or closed) by the movable valve disc 122K. Accordingly, the first-stage purified water produced by the first-stage filter element 22K will flow to the second-stage filter element 23K under the action of water pressure, and after being further purified by the second-stage filter element 23K, is provided through the fourth opening 1104K, the second communication passage 1002K and the fifth opening 1105K. FIGS. 12A-12B As shown, when the flat valve 10K is in the first purifying working position, the second passage 102K and the third passage 103K of the flat valve 10K are blocked (or closed) by the movable valve disc 122K. Accordingly, the first-stage purified water produced by the first-stage filter element 22K will flow to the second-stage filter element 23K under the action of water pressure, and after being further purified by the second-stage filter element 23K, is provided through the fourth opening 1104K, the second communication passage 1002K and the fifth opening 1105K.

[0264] As shown, when the flat valve 10K is in the first purifying working position, the second passage 102K and the third passage 103K of the flat valve 10K are blocked (or closed) by the movable valve disc 122K. Accordingly, the first-stage purified water produced by the first-stage filter element 22K will flow to the second-stage filter element 23K under the action of water pressure, and after being further purified by the second-stage filter element 23K, is provided through the fourth opening 1104K, the second communication passage 1002K and the fifth opening 1105K. FIG. 10B and FIGS. 12C-12DAs shown, the planar valve 10K of the water purifier 2 according to the first embodiment of the present application further has an eighth passage 108K, wherein the eighth passage 108K is provided in the fixed valve plate 121K and extends from the first fluid control surface 1210K of the fixed valve plate 121K, and the eighth passage 108K is in communication with the first opening 1101K. The planar valve 10K of the water purifier 2 according to the first embodiment of the present application further has a second purification working position, wherein when the planar valve 10K is in the second purification working position, the sixth passage 106K of the planar valve 10K is in communication with the eighth passage 108K, so as to form the third communication passage 1003K in communication with the raw water inlet 1106K and the first opening 1101K respectively, and the seventh passage 107K is in communication with the second passage 102K and the third passage 103K respectively, so as to form the fourth communication passage 1004K in communication with the second opening 1102K and the third opening 1103K respectively. When the planar valve 10K of the water purifier 2 according to the first embodiment of the present application is in the second purification working position, the fourth passage 104K and the fifth passage 105K of the planar valve 10K are blocked (or closed) by the moving valve plate 122K, so that the water flow in the fourth passage 104K cannot flow freely, and correspondingly, the first-stage purified water generated by the first-stage filter element 22K will flow to the second opening 1102K under the action of water pressure and be provided through the fourth communication passage 1004K and the third opening 1103K.

[0265] As shown in FIG. 1, FIG. 10C and FIG. 12E As shown, the planar valve 10K of the water purifier 2 according to the first embodiment of the present application further has a standby working position, wherein when the planar valve 10K is in the standby working position, the sixth passage 106K and the seventh passage 107K of the planar valve 10K are both blocked by the first fluid control surface 1210K of the fixed valve plate 121K, so that the raw water can only flow to the raw water inlet 1106K. Further, when the planar valve 10K is in the standby working position, the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K and the eighth passage 108K of the fixed valve plate 121K are blocked (or closed) by the moving valve plate 122K. That is, when the planar valve 10K of the water purifier 2 according to the first embodiment of the present application is in the standby working position, the planar valve 10K can prevent the raw water from flowing through the planar valve 10K, so that the planar valve 10K can control the raw water not to flow to the filter device 20K, and at the same time, the planar valve 10K can also prevent the raw water or purified water from being provided to the user.

[0266] As shown in FIG. 1, FIG. 10D and FIG. 12FAs shown, the planar valve 10K of the water purifier 2 according to the first embodiment of the present application further has a ninth passage 109K, a tenth passage 1010K and an eleventh passage 101 IK, wherein the ninth passage 109K, the tenth passage 1010K and the eleventh passage 101 IK are respectively provided in the fixed valve plate 121 K and respectively extend from the first fluid control surface 1210K of the fixed valve plate 121 K, wherein the ninth passage 109K is in communication with the blowdown opening 1109K, the tenth passage 1010K is in communication with the second opening 1102K, and the eleventh passage 101 IK is in communication with the first opening 1101 K. The planar valve 10K of the water purifier 2 according to the first embodiment of the present application further has a backwashing working position, when the planar valve 10K is in the backwashing working position, the sixth passage 106K of the planar valve 10K is in communication with the tenth passage 1010K, thereby forming the fifth communication passage 1005K in communication with the raw water inlet 1106K and the second opening 1102K respectively, the seventh passage 107K is in communication with the ninth passage 109K and the eleventh passage 101 IK respectively, thereby forming the sixth communication passage 1006K in communication with the first opening 1101 K and the blowdown opening 1109K respectively. As shown in FIG. 1 1, FIG. 12F As shown, when the planar valve 10K of the water purifier 2 according to the first embodiment of the present application is in the backwashing working position, the first passage 101 K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K and the eighth passage 108K of the planar valve 10K are respectively blocked (or closed) by the moving valve plate 122K.

[0267] As shown in FIG. 1 1, FIGS. 9A-9F and FIGS. 11A-11DAs shown, the first fluid control face 1210K of the stationary valve piece 121K of the planar valve 10K of the water purifier 2 according to the first embodiment of the present application forms a center portion 12101K, an extension portion 12102K extending outwardly from the center portion 12101K, and an edge portion 12103K extending outwardly from the extension portion 12102K, wherein the first passage 101K, the eighth passage 108K and the tenth passage 1010K of the planar valve 10K extend from the edge portion 12103K of the first fluid control face 1210K of the stationary valve piece 121K, respectively, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K, the ninth passage 109K and the eleventh passage 1011K extend from the extension portion 12102K of the first fluid control face 1210K of the stationary valve piece 121K, respectively, the second fluid control face of the moving valve piece 122K of the planar valve 10K forms a center region 12201K, an extension region 12202K extending outwardly from the center region 12201K, and an edge region 12203K extending outwardly from the extension region 12202K, the sixth passage 106K of the planar valve 10K extends from the edge region 12203K of the second fluid control face 1220K of the moving valve piece 122K, and the seventh passage 107K extends from the extension region 12202K of the second fluid control face 1220K of the moving valve piece 122K. Further, when the second fluid control face 1220K of the moving valve piece 122K is arranged at the first fluid control face 1210K of the stationary valve piece 121K, the center portion 12101K of the first fluid control face 1210K of the stationary valve piece 121K is opposite to the center region 12201K of the second fluid control face, the extension portion 12102K of the first fluid control face 1210K of the stationary valve piece 121K is opposite to the extension region 12202K of the second fluid control face 1220K, and the edge portion 12103K of the first fluid control face 1210K of the stationary valve piece 121K is opposite to the edge region 12203K of the second fluid control face 1220K of the moving valve piece 122K. Preferably, the moving valve piece 122K has the same outer diameter as the stationary valve piece 121K.

[0268] As shown in the drawings FIGS. 9A-9F and FIGS. 11A-11DAs shown, in the first embodiment of the water purifier 2 according to the present invention, the first channel 101K, the second channel 102K, the third channel 103K, the fourth channel 104K, the fifth channel 105K, the eighth channel 108K, the ninth channel 109K, the tenth channel 1010K and the eleventh channel 1011K of the planar valve 10K are arranged separately on the first fluid control surface 1210K of the fixed valve plate 121K; the sixth channel 106K and the seventh channel 107K of the planar valve 10K are arranged separately on the second fluid control surface 1220K of the movable valve plate 122K.

[0269] As shown in the attached image. FIGS. 5A-6E As shown, in the first embodiment of the present invention, the first opening 1101K, the second opening 1102K and the fourth opening 1104K of the planar valve 10K of the water purifier 2 are disposed on the same side of the valve body 11K of the planar valve 10K.

[0270] As shown in the attached image. FIG. 5C and FIGS. 7B-7EAs shown, the water purifier 2 according to the first embodiment of the present application further comprises a flow guide plate 30, wherein the flow guide plate 30 is disposed between the base 24K of the filter device 20K and the valve body 11K of the control valve 10K, wherein the flow guide plate 30 has a first flow guide through hole 301, a second flow guide through hole 302, and a third flow guide through hole 303, wherein the first flow guide through hole 301 has a first flow guide port 3011 and a second flow guide port 3012, the second flow guide through hole 302 has a third flow guide port 3021 and a fourth flow guide port 3022, and the third flow guide through hole 303 has a fifth flow guide port 3031 and a sixth flow guide port 3032, wherein the flow guide plate 30 further has a first side 31 and a second side 32, wherein the first flow guide port 3011, the third flow guide port 3021, and the fifth flow guide port 3031 are disposed on the first side 31 of the flow guide plate 30, and the second flow guide port 3012, the fourth flow guide port 3022, and the sixth flow guide port 3032 are disposed on the second side 32 of the flow guide plate 30, wherein the first side 31 of the flow guide plate 30 is disposed towards the valve body 11K, and the second side 32 of the flow guide plate 30 is disposed towards the base 24K. Further, the first flow guide port 3011 is disposed in communication with the first opening 1101K of the valve body 11K, the third flow guide port 3021 is disposed in communication with the second opening 1102K, the fifth flow guide port 3031 is disposed in communication with the fourth opening 1104K, the second flow guide port 3012 is disposed in communication with the first communication opening 201K of the filter device 20K, the fourth flow guide port 3022 is disposed in communication with the second communication opening 202K, and the sixth flow guide port 3032 is disposed in communication with the third communication opening 203K. In other words, the first flow guide through hole 301 of the flow guide plate 30 is in communication with the first opening 1101K and the first communication opening 201K respectively, the second flow guide through hole 302 is in communication with the second opening 1102K and the second communication opening 202K respectively, and the third flow guide through hole 303 is in communication with the fourth opening 1104K and the third communication opening 203K respectively. Preferably, the flow guide plate 30 is made of a sealing material, so as to be disposed between the base 24K of the filter device 20K and the valve body 11K of the control valve 10K in a water-tight manner, thereby playing a role of sealing the connection between the base 24K of the filter device 20K and the valve body 11K of the control valve 10K.

[0271] As shown in the drawings FIG. 5C and FIGS. 7B-7EAs shown, the flow guide plate 30 of the water purifier 2 according to the first embodiment of the present application further has a positioning protrusion 33, wherein the positioning protrusion 33 is preferably arranged at the first side 31, wherein the positioning protrusion 33 is arranged to be engaged with a positioning slot 34K arranged at the valve body 11K, thereby helping the flow guide plate 30 to be correctly arranged between the valve body 11K of the control valve 10K and the base 24K of the filtering device 20K. It can be understood that when the positioning protrusion 33 of the flow guide plate 30 is correctly engaged with the positioning slot 34K arranged at the valve body 11K, the first flow guide port 3011 is communicated with the first opening 1101K of the valve body 11K, the third flow guide port 3021 is communicated with the second opening 1102K, the fifth flow guide port 3031 is communicated with the fourth opening 1104K, the second flow guide port 3012 is communicated with the first communicating opening 201K of the filtering device 20K, the fourth flow guide port 3022 is communicated with the second communicating opening 202K, and the sixth flow guide port 3032 is communicated with the third communicating opening 203K. It is worth noting that the flow guide plate 30 of the water purifier 2 according to the present application will significantly reduce the manufacturing difficulty of the base 24K of the filtering device 20K of the water purifier 2 according to the present application. As shown in FIG. 1, the water purifier 2 according to the present application further has a water inlet pipe 12K arranged at the valve body 11K of the control valve 10K, wherein the water inlet pipe 12K is arranged to be communicated with the first opening 1101K of the valve body 11K, and the water inlet pipe 12K is arranged to be communicated with the water inlet pipe 13K of the filtering device 20K. FIG. 5C and FIGS. 7B-7EAs shown, the first opening 1101K, the second opening 1102K and the fourth opening 1104K of the valve body 11K of the control valve 10K of the water purifier 2 of the present application are irregularly distributed and shaped on the valve body 11K, which makes it difficult for the first communication opening 201K, the second communication opening 202K and the third communication opening 203K of the filter device 20K to cooperate and communicate with the first opening 1101K, the second opening 1102K and the fourth opening 1104K of the valve body 11K. In addition, if the base 24K of the filter device 20K is directly connected to the valve body 11K, the distribution and shape of the first opening 1101K, the second opening 1102K and the fourth opening 1104K of the valve body 11K will determine the distribution and shape of the first communication opening 201K, the second communication opening 202K and the third communication opening 203K of the filter device 20K on the base 24K of the filter device 20K, which will significantly increase the manufacturing difficulty of the base 24K of the filter device 20K. The first flow guide opening 3011 provided on the first side 31 of the flow guide plate 30 of the water purifier 2 of the present application is adapted to communicate with the first opening 1101K of the valve body 11K, the third flow guide opening 3021 is adapted to communicate with the second opening 1102K, and the fifth flow guide opening 3031 is adapted to communicate with the fourth opening 1104K. The second flow guide opening 3012 provided on the second side 32 of the flow guide plate 30 is adapted to communicate with the first communication opening 201K of the filter device 20K, the fourth flow guide opening 3022 is adapted to communicate with the second communication opening 202K, and the sixth flow guide opening 3032 is adapted to communicate with the third communication opening 203K. The above structure of the flow guide plate 30 of the water purifier 2 of the present application facilitates the cooperation and communication between the first communication opening 201K, the second communication opening 202K and the third communication opening 203K of the filter device 20K and the first opening 1101K, the second opening 1102K and the fourth opening 1104K of the valve body 11K. In addition, the above structure of the flow guide plate 30 of the water purifier 2 of the present application also allows the base 24K of the filter device 20K and the valve body 11K of the control valve 10K to be manufactured separately, and the distribution and shape of the first communication opening 201K, the second communication opening 202K and the third communication opening 203K of the filter device 20K on the base 24K are not limited by the distribution and shape of the first opening 1101K, the second opening 1102K and the fourth opening 1104K of the valve body 11K. This reduces the manufacturing difficulty of the base 24K of the filter device 20K.

[0272] As shown in the accompanying drawings FIGS. 8A-9FAs shown in FIG. 1, the fixed valve piece 121K of the valve core 12K of the planar valve 10K of the water purifier 2 according to the first embodiment of the present application comprises a high end portion 1211K, a low end portion 1212K and a fixed portion 1213K disposed between the high end portion 1211K and the low end portion 1212K, wherein the high end portion 1211K forms the first fluid control face 1210K of the fixed valve piece 121K, and the low end portion 1212K is disposed in the valve cavity 110K of the valve body 11K. Preferably, the low end portion 1212K of the fixed valve piece 121K of the valve core 12K of the planar valve 10K of the water purifier 2 according to the first embodiment of the present application is integrally formed on the inner wall of the valve body 11K of the planar valve 10K.

[0273] As shown in FIG. 1, the fixed valve piece 121K of the valve core 12K of the planar valve 10K of the water purifier 2 according to the first embodiment of the present application comprises a high end portion 1211K, a low end portion 1212K and a fixed portion 1213K disposed between the high end portion 1211K and the low end portion 1212K, wherein the high end portion 1211K forms the first fluid control face 1210K of the fixed valve piece 121K, and the low end portion 1212K is disposed in the valve cavity 110K of the valve body 11K. Preferably, the low end portion 1212K of the fixed valve piece 121K of the valve core 12K of the planar valve 10K of the water purifier 2 according to the first embodiment of the present application is integrally formed on the inner wall of the valve body 11K of the planar valve 10K. FIG. 7A FIGS. 8A-8H As shown in FIG. 1, the fixed valve piece 121K of the valve core 12K of the planar valve 10K of the water purifier 2 according to the first embodiment of the present application comprises a high end portion 1211K, a low end portion 1212K and a fixed portion 1213K disposed between the high end portion 1211K and the low end portion 1212K, wherein the high end portion 1211K forms the first fluid control face 1210K of the fixed valve piece 121K, and the low end portion 1212K is disposed in the valve cavity 110K of the valve body 11K. Preferably, the low end portion 1212K of the fixed valve piece 121K of the valve core 12K of the planar valve 10K of the water purifier 2 according to the first embodiment of the present application is integrally formed on the inner wall of the valve body 11K of the planar valve 10K. FIG. 7A FIGS. 8A-8H ​​As shown, the accommodating chamber 410 of the fixing bracket 41 of the fixing device 40 of the water purifier 2 according to the first embodiment of the present application is arranged to accommodate the high end portion 121 IK of the fixed valve plate 121 K and the movable valve plate 122 K therein, and the sixth passage 106 K of the flat valve 10 K is arranged to communicate with the accommodating chamber 410 of the fixing bracket 41, so that raw water can be supplied to the sixth passage 106 K of the flat valve 10 K through the water inlet opening 401 of the fixing bracket 41 and the accommodating chamber 410. In other words, the sixth passage 106 K of the flat valve 10 K communicates with the valve cavity 110 K of the valve body 11 K and the raw water inlet 1106 K of the valve body 11 K through the accommodating chamber 410 of the fixing bracket 41, the water inlet opening 401 and the valve cavity 110 K of the valve body 11 K. As shown in FIG. 1 1, the fixing device 40 of the water purifier 2 according to the first embodiment of the present application is arranged to be connected to the flat valve 10 K through the fixing bracket 41, and the fixing device 40 is arranged to be connected to the water inlet pipe 20 through the water inlet pipe 21 and the water inlet pipe 22. FIG. 7A and FIGS. 8A-8H As shown, further, the high end portion 121 IK of the fixed valve plate 121 K is arranged to be detachably clamped to the fixing portion 1213 K of the fixed valve plate 121 K, and the fixing portion 1213 K of the fixed valve plate 121 K is arranged to be detachably clamped to the low end portion 1212 K of the fixed valve plate 121 K, so that the high end portion 121 IK of the fixed valve plate 121 K cannot rotate relative to the fixing portion 1213 K, and the fixing portion 1213 K of the fixed valve plate 121 K cannot rotate relative to the low end portion 1212 K.

[0274] It is worth noting that the high end portion 1211K of the fixed valve piece 121K of the valve core 12K of the planar valve 10K of the water purifier 2 of the present application is detachably clamped to the fixed portion 1213K of the fixed valve piece 121K, the fixed portion 1213K of the fixed valve piece 121K is detachably clamped to the low end portion 1212K of the fixed valve piece 121K, and the high end portion 1211K of the fixed valve piece 121K and the moving valve piece 122K are accommodated in the accommodation chamber 410 of the fixed bracket 41, so that the high end portion 1211K, the fixed portion 1213K and the moving valve piece 122K of the fixed valve piece 121K can be integrated together by the fixed bracket 41, the first clamping member 42 and the second clamping member 43 of the fixing device 40. In particular, since the high end portion 1211K of the fixed valve piece 121K forms the first fluid control face 1210K of the fixed valve piece 121K, and the high end portion 1211K of the fixed valve piece 121K is detachably clamped to the fixed portion 1213K of the fixed valve piece 121K, so that the high end portion 1211K can be manufactured separately and the side of the high end portion 1211K facing the moving valve piece 122K can be easily processed, such as being polished smooth, to form the first fluid control face 1210K. However, if the fixed valve piece 121K of the valve core 12K of the planar valve 10K of the water purifier 2 of the present application is fixedly arranged in the valve body 11K, or the fixed valve piece 121K of the valve core 12K of the planar valve 10K is integrally formed with the valve body 11K, then the side of the high end portion 1211K of the fixed valve piece 121K of the valve core 12K of the planar valve 10K facing the moving valve piece 122K is difficult to process and obtain the first fluid control face 1210K.

[0275] As shown in the accompanying drawings FIG. 2A 、 FIG. 7A and FIGS. 8A-8HAs shown, according to the first embodiment of the present invention, the first snap-fit ​​member 42 of the fixing device 40 of the water purifier 2 includes a set of hooks 421 disposed on the side wall of the fixing portion 1213K of the fixed valve plate 121K, and the second snap-fit ​​member 43 has a set of snap-fit ​​grooves 430, wherein the hooks 421 of the first snap-fit ​​member 42 are adapted to engage with the snap-fit ​​grooves 430 of the second snap-fit ​​member 43, thereby snapping the first snap-fit ​​member 42 and the second snap-fit ​​member 43 together. Optionally, the first snap-fit ​​member 42 has a set of snap-fit ​​grooves 430 disposed on the side wall of the fixing portion 1213K of the fixed valve plate 121K, and the second snap-fit ​​member 43 has a set of hooks 421 disposed on the fixing bracket 41, wherein the hooks 421 of the second snap-fit ​​member 43 are adapted to engage with the snap-fit ​​grooves 430 of the first snap-fit ​​member 42. In other words, the hook 421 of the fixing device 40 is disposed on the fixing bracket 41, and the snap-fit ​​groove 430 is disposed on the side wall of the fixing portion 1213K of the fixed valve plate 121K. Further, the fixing device 40 has a set of guide grooves 400 and a set of guide members 45, wherein the guide grooves 400 are respectively disposed on the side wall of the fixing portion 1213K of the fixed valve plate 121K, and the guide members 45 are disposed on the second snap-fit ​​member 43 and extend from the second snap-fit ​​member 43, wherein the guide members 45 are respectively disposed directly opposite the snap-fit ​​groove 430, and the width of the guide members 45 is not greater than the width of the guide grooves 400, thereby allowing the first snap-fit ​​member 42 and the second snap-fit ​​member 43 to snap together under the guidance of the guide grooves 400 and the guide members 45.

[0276] As shown in the attached image. FIG. 2A , FIG. 7A and FIGS. 8A-8H As shown, the control valve 10K of the water purifier 2 according to the first embodiment of the present invention further includes a drive assembly 6, wherein the drive assembly 6 is configured to drive the movable valve plate 122K of the planar valve 10K to rotate relative to the fixed valve plate 121K. (See attached figures) FIG. 2A , FIG. 7A and FIGS. 8A-8HAs shown, the driving assembly 6 includes a valve stem 60, and the fixed holder 41 further has an operation opening 402 which is in communication with the accommodating chamber 410 of the fixed holder 41, wherein the valve stem 60 has a driving end 61 and an operation end 62 extending from the driving end 61, the driving end 61 of the valve stem 60 is arranged in the accommodating chamber 410 of the fixed holder 41, and the operation end 62 of the valve stem 60 extends from the driving end 61 and passes through the operation opening 402 of the fixed holder 41 out of the accommodating chamber 410 of the fixed holder 41. Accordingly, when the operation end 62 of the valve stem 60 is operated to rotate, the driving end 61 is driven to rotate and further drives the dynamic valve plate 122K to rotate, so as to control the flat valve 10K to be in a corresponding working position. Accordingly, the high end portion 1211K, the fixed portion 1213K, the dynamic valve plate 122K and the valve stem 60 of the static valve plate 121K can be integrated together by the fixed holder 41, the first clamping member 42 and the second clamping member 43 of the fixing device 40, so as to reduce the manufacturing difficulty of the static valve plate 121K and the difficulty of assembling the high end portion 1211K, the fixed portion 1213K, the dynamic valve plate 122K and the valve stem 60 of the static valve plate 121K into the valve cavity 110K of the valve body 11K. It can be understood that the way of integrating the high end portion 1211K, the fixed portion 1213K, the dynamic valve plate 122K and the valve stem 60 of the static valve plate 121K together by the fixed holder 41, the first clamping member 42 and the second clamping member 43 of the fixing device 40 also makes the high end portion 1211K, the fixed portion 1213K, the dynamic valve plate 122K and the valve stem 60 of the static valve plate 121K more convenient for the automatic assembly and production of the flat valve 10K. Further, the outer diameter of the driving end 61 of the valve stem 60 is smaller than the inner diameter of the accommodating chamber 410 of the fixed holder 41 and larger than the inner diameter of the operation opening 402 of the fixed holder 41, and the outer diameter of the operation end 62 of the valve stem 60 is smaller than the inner diameter of the operation opening 402 of the fixed holder 41, so that the fixed holder 41 can be pressed against the driving end 61 of the valve stem 60 under the action of an external force, so that the dynamic valve plate 122K can be pressed against the high end portion 1211K of the static valve plate 121K and the second fluid control surface 1220K of the dynamic valve plate 122K is arranged at the first fluid control surface 1210K of the static valve plate 121K under the action of the driving end 61 of the valve stem 60.

[0277] It is understood that the driving assembly 6 can be any mechanism or component capable of driving the rotary motion of the movable valve plate 122K of the flat valve 10K relative to the fixed valve plate 121K. Exemplarily, the driving assembly 6 can also be a gear set for driving the rotary motion of the movable valve plate 122K of the flat valve 10K relative to the fixed valve plate 121K, wherein the gear set comprises a driving gear and a driven gear disposed on the side wall of the movable valve plate 122K, the driving gear being engaged with the driven gear of the movable valve plate 122K so as to enable a user or operator to drive the rotary motion of the movable valve plate 122K relative to the fixed valve plate 121K by rotating the driving gear. Exemplarily, the driving assembly 6 can also comprise a driving rod disposed on the movable valve plate 122K of the flat valve 10K and parallel to the second fluid control surface 1220K of the movable valve plate 122K, the user being able to drive the rotary motion of the movable valve plate 122K relative to the fixed valve plate 121K by the driving rod of the driving assembly 6. As shown in the accompanying drawings, FIG. 2A The fixing device 40 of the water purifier 2 according to the first embodiment of the present application further comprises a fixing member 44, wherein the fixing member 44 is arranged to press against the fixing support 41, and the fixing member 44 is arranged to be fixed to the valve body 11K of the flat valve 10K. Accordingly, the fixing support 41 is retained in the valve cavity 110K of the valve body 11K by the fixing member 44.

[0278] As shown in the accompanying drawings, FIG. 2A , FIG. 7A and FIGS. 8A-8HAs shown, the control valve 10K of the water purifier 2 according to the first embodiment of the present application further comprises a positioning assembly 50, wherein the positioning assembly 50 has a limiting element 51 and a reset element 52 arranged at the limiting element 51, a set of arc-shaped limiting grooves 501 arranged at the inner wall of the fixed support 41 and an operating chamber 502 arranged at the driving end 61 of the valve rod 60, wherein the limiting element 51 and the reset element 52 are arranged in the operating chamber 502, and the reset element 52 is arranged between the limiting element 51 and the driving end 61, so that when the driving end 61 of the valve rod 60 is rotated and the limiting element 51 is opposite to the limiting groove 501, the limiting element 51 will move into the limiting groove 501 under the reset force (or elastic force) of the reset element 52. At this time, when the driving end 61 of the valve rod 60 is continuously rotated so that the fixed support 41 presses the limiting element 51, thereby making the limiting element 51 retract into the operating chamber 502, the driving end 61 of the valve rod 60 can be easily rotated and the limiting element 51 can be kept retracted in the operating chamber 502 under the pressing of the fixed support 41. It can be understood that when the driving end 61 of the valve rod 60 is rotated so that the limiting element 51 is opposite to the limiting groove 501, thereby making the limiting element 51 move into the limiting groove 501, the flat valve 10K is kept in a corresponding working position, and the water purifier 2 according to the present application is in a corresponding working state. It can be understood that the reset element 52 is a reset spring. Alternatively, the reset element 52 is a reset spring piece. Preferably, the limiting element 51 is arranged to be engaged with the limiting groove 501, so that the limiting element 51 can be stably kept in the limiting groove 501 when the valve rod 60 is not driven to rotate by appropriate external force.

[0279] As shown in the accompanying drawings FIG. 2A 、 FIG. 7A and FIGS. 8A-8HAs shown, the planar valve 10K of the water purifier 2 according to the first embodiment of the present application further comprises a sealing assembly 13K, wherein the sealing assembly 13K has a first sealing member 131K, wherein the first sealing member 131K is disposed between the high end portion 1211K and the fixed portion 1213K of the valve disc 121K. Further, the first sealing member 131K has a plurality of first sealing strips 1311K, the fixed portion 1213K of the valve disc 121K has a set of first sealing grooves 12130K, wherein the first sealing grooves 12130K are disposed around the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K, the eighth passage 108K, the ninth passage 109K, the tenth passage 1010K and the eleventh passage 1011K of the valve disc 121K respectively, the first sealing strips 1311K of the first sealing member 131K are disposed in the first sealing grooves 12130K of the fixed portion 1213K, so that the first sealing strips 1311K of the first sealing member 131K can be engaged in the first sealing grooves 12130K of the fixed portion 1213K and achieve the sealing between the high end portion 1211K and the fixed portion 1213K of the valve disc 121K. It is understood that the first sealing grooves 12130K are formed on the side of the fixed portion 1213K towards the high end portion 1211K. Further, the sealing assembly 13K has a second sealing member 132K, wherein the second sealing member 132K is disposed between the fixed portion 1213K and the low end portion 1212K of the valve disc 121K. Further, the second sealing member 132K has a plurality of second sealing strips 1321K, the fixed portion 1213K of the valve disc 121K has a set of second sealing grooves 12131K, wherein the second sealing grooves 12131K are disposed around the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K, the eighth passage 108K, the ninth passage 109K, the tenth passage 1010K and the eleventh passage 1011K of the valve disc 121K respectively, the second sealing strips 1321K of the second sealing member 132K are disposed in the second sealing grooves 12131K of the fixed portion 1213K, so that the second sealing strips 1321K of the second sealing member 132K can be engaged in the second sealing grooves 12131K of the fixed portion 1213K and achieve the sealing between the low end portion 1212K and the fixed portion 1213K of the valve disc 121K. It is understood that the second sealing grooves 12131K are formed on the side of the fixed portion 1213K towards the low end portion 1212K.

[0280] As shown in the drawings FIG. 2A , FIG. 7A and FIGS. 8A-8HAs shown in the drawings, the sealing assembly 13K of the water purifier 2 according to the first embodiment of the present application further comprises at least one first sealing ring 133K, wherein the first sealing ring 133K is arranged on the outer surface of the fixed support 41 to achieve the sealing between the fixed support 41 and the inner wall of the valve body 11K and prevent raw water from flowing out from between the fixed support 41 and the inner wall of the valve body 11K. Further, the sealing assembly 13K comprises at least one second sealing ring 134K, wherein the second sealing ring 134K is arranged between the valve rod 60 and the fixed support 41 to achieve the sealing between the valve rod 60 and the inner wall of the fixed support 41 and prevent raw water from flowing out from between the valve rod 60 and the inner wall of the fixed support 41.

[0281] As shown in the drawings, FIG. 2A , FIG. 7A and FIGS. 8A-8B , the control valve 10K of the water purifier 2 according to the first embodiment of the present application further comprises a knob 80, wherein the knob 80 is arranged on the operation end 62 of the valve rod 60 to facilitate the user to rotate the valve rod 60 so as to rotate the moving valve plate 122K and control the flat valve 10K to be in the corresponding working position.

[0282] As shown in the drawings, FIGS. 10A-12FAs shown, the first fluid control surface 1210K of the stationary valve plate 121K of the planar valve 10K of the water purifier 2 according to the first embodiment of the present application has a center portion 12101K, an extension portion 12102K extending outwardly from the center portion 12101K, and an edge portion 12103K extending outwardly from the extension portion 12102K, wherein the center portion 12101K, the extension portion 12102K, and the edge portion 12103K are located at the top end portion 1214K of the stationary valve plate 121K, and the extension portion 12102K and the edge portion 12103K (or the portion outside the center portion 12101K) of the first fluid control surface 1210K are divided into a first portion 1201K, a second portion 1202K, a third portion 1203K, and a fourth portion 1204K as shown by the dot-dash line; the second fluid control surface 1220K of the movable valve plate 122K of the planar valve 10K has a center region 12201K, an extension region 12202K extending outwardly from the center region 12201K, and an edge region 12203K extending outwardly from the extension region 12202K, wherein the center region 12201K, the extension region 12202K, and the edge region 12203K are located at the bottom end portion 1221K of the movable valve plate 122K, and the extension region 12202K and the edge region 12203K (the portion outside the center region 12201K) of the second fluid control surface 1220K are divided into a first region 2001K, a second region 2002K, a third region 2003K, and a fourth region 2004K as shown by the dot-dash line;The first channel 101K extends downward from the first portion 1201K of the first fluid control surface 1210K of the fixed valve plate 121K; the second channel 102K extends downward from the first portion 1201K of the first fluid control surface 1210K of the fixed valve plate 121K; the third channel 103K extends downward from the first portion 1201K of the first fluid control surface 1210K of the fixed valve plate 121K; the fourth channel 104K extends downward from the third portion 1203K of the first fluid control surface 1210K of the fixed valve plate 121K; the fifth channel 105K extends downward from the third portion 1203K of the first fluid control surface 1210K of the fixed valve plate 121K; and the sixth channel 106K extends downward from the second fluid control surface 1210K of the movable valve plate 122K. The first region 2001K of the control surface 1220K extends upward; the seventh channel 107K extends upward from the third region 2003K of the second fluid control surface 1220K of the movable valve plate 122K; the eighth channel 108K extends downward from the third portion 1203K of the first fluid control surface 1210K of the fixed valve plate 121K; the ninth channel 109K extends downward from the second portion 1202K of the first fluid control surface 1210K of the fixed valve plate 121K; the tenth channel 1010K extends downward from the fourth portion 1204K of the first fluid control surface 1210K of the fixed valve plate 121K; and the eleventh channel 1011K extends downward from the second portion 1202K of the first fluid control surface 1210K of the fixed valve plate 121K. (See attached figures.) FIGS. 11A-11DAs shown, preferably, the extension 12102K and the edge portion 12103K of the first fluid control face 1210K of the stationary valve disc 121K are divided into the first portion 1201K, the second portion 1202K, the third portion 1203K and the fourth portion 1204K clockwise, the extension region 12202K and the edge region 12203K of the second fluid control face 1220K of the movable valve disc 122K of the flat valve 10K are divided into the first region 2001K, the second region 2002K, the third region 2003K and the fourth region 2004K clockwise. In other words, the first fluid control face 1210K of the stationary valve disc 121K of the flat valve 10K forms four equal divisions, the second fluid control face 1220K of the movable valve disc 122K of the flat valve 10K forms four equal divisions, wherein when the movable valve disc 122K of the flat valve 10K is rotated to the first division (the first region 2001K) of the second fluid control face 1220K of the movable valve disc 122K directly opposite the fourth division (the fourth portion 1204K) of the first fluid control face 1210K of the stationary valve disc 121K, the third division (the third region 2003K) of the second fluid control face 1220K of the movable valve disc 122K of the flat valve 10K is directly opposite the second division (the second portion 1202K) of the first fluid control face 1210K of the stationary valve disc 121K, so that the sixth channel 106K of the flat valve 10K is in communication with the tenth channel 1010K, the seventh channel 107K is in communication with the ninth channel 109K and the eleventh channel 1011K respectively, to allow raw water to flow from the raw water inlet 1106K, the sixth channel 106K, the tenth channel 1010K, the second opening 1102K, the second communication opening 202K into the filter device 20K, and after the primary filter element 22K of the filter device 20K is back-flushed (referring to the flow direction of water in the primary filter element 22K during back-flushing being opposite to that during filtering), the raw water flows out through the first communication opening 201K of the filter device 20K, and then flows out through the first opening 1101K, the eleventh channel 1011K, the seventh channel 107K, the ninth channel 109K and the blowdown opening 1109K, and correspondingly, at this time, the purifier 2 is in the back-flushing working state.Further, when the moving valve disc 122K of the flat valve 10K is rotated to the first equal part (the first area 2001K) of the second fluid control surface 1220K of the moving valve disc 122K directly opposite the third equal part (the third part 1203K) of the first fluid control surface 1210K of the fixed valve disc 121K, the third equal part (the third area 2003K) of the second fluid control surface 1220K of the moving valve disc 122K of the flat valve 10K is directly opposite the first equal part (the first part 1201K) of the first fluid control surface 1210K of the fixed valve disc 121K, so that the sixth channel 106K of the flat valve 10K is in communication with the eighth channel 108K, and the seventh channel 107K is in communication with the second channel 102K and the third channel 103K respectively, to allow raw water to flow from the raw water inlet 1106K, the sixth channel 106K, the eighth channel 108K, the first opening 1101K, the first communication opening 201K into the filter device 20K, and after the raw water is filtered by the primary filter element 22K of the filter device 20K, the filtered water flows out through the filtered water channel 2201K of the primary filter element 22K and the second communication opening 202K, and then flows out through the second opening 1102K, the second channel 102K, the seventh channel 107K, the third channel 103K and the third opening 1103K and is provided, and accordingly, at this time, the water purifier 2 is in the second purification working state. Further, when the moving valve disc 122K of the flat valve 10K is rotated to the first equal part (the first area 2001K) of the second fluid control surface 1220K of the moving valve disc 122K directly opposite the second equal part (the second part 1202K) of the first fluid control surface 1210K of the fixed valve disc 121K, the third equal part (the third area 2003K) of the second fluid control surface 1220K of the moving valve disc 122K of the flat valve 10K is directly opposite the fourth equal part (the fourth part 1204K) of the first fluid control surface 1210K of the fixed valve disc 121K, so that the sixth channel 106K of the flat valve 10K is blocked by the first fluid control surface 1210K of the fixed valve disc 121K, the seventh channel 107K is blocked by the first fluid control surface 1210K of the fixed valve disc 121K, the first channel 101K, the second channel 102K, the third channel 103K, the fourth channel 104K, the fifth channel 105K, the eighth channel 108K, the ninth channel 109K, the tenth channel 1010K and the eleventh channel 1011K of the fixed valve disc 121K are blocked by the moving valve disc 122K respectively, and the flat valve 10K controls that raw water does not flow to the filter device 20K and also does not provide raw water or purified water to the user, and accordingly, at this time, the water purifier 2 is in the standby working state.When the movable valve disc 122K of the flat valve 10K is rotated to the first fluid control surface 1220K of the movable valve disc 122K, the third section (the third area 2003K) of the second fluid control surface 1220K of the movable valve disc 122K of the flat valve 10K is opposite to the third section (the third section 1203K) of the first fluid control surface 1210K of the fixed valve disc 121K, so that the sixth channel 106K of the flat valve 10K is communicated with the first channel 101K, and the seventh channel 107K is communicated with the fourth channel 104K and the fifth channel 105K respectively, to allow raw water to flow from the raw water inlet 1106K, the sixth channel 106K, the first channel 101K, the first opening 1101K, the first communication opening 201K into the filter device 20K, and the raw water filtered by the primary filter element 22K of the filter device 20K flows into the purified water channel 2201K of the filter device 20K, the purified water filtered by the primary filter element 22K further flows through the secondary filter element 23K to generate secondary purified water, and the secondary purified water flows out of the third communication opening 203K through the purified water outlet 2301K, and then flows out and is provided through the fourth opening 1104K, the fourth channel 104K, the seventh channel 107K, the fifth channel 105K and the fifth opening 1105K, and correspondingly, at this time, the purified water device 2 is in the first purification working state.

[0283] As shown in the drawings FIGS. 11A-12FAs shown, preferably, the fourth passage 104K and the fifth passage 105K of the water purifier 2 according to the first embodiment of the present application extend along the first fluid control surface 1210K, and the fourth passage 104K and the fifth passage 105K extend in the same direction, and the sixth passage 106K and the seventh passage 107K correspond to each other, so that the flat valve 10K is switched from the standby working position to the first purification working position, when the moving valve sheet 122K of the flat valve 10K is rotated to the sixth passage 106K coincides with the first passage 101K, the seventh passage 107K coincides with the fourth passage 104K and the fifth passage 105K at the same time; and the flat valve 10K is switched from the standby working position to the second purification working position, when the moving valve sheet 122K of the flat valve 10K is rotated to the sixth passage 106K coincides with the eighth passage 108K, the seventh passage 107K coincides with the second passage 102K and the third passage 103K at the same time. Accordingly, when the flat valve 10K is switched from the standby working position to the first purification working position (or switched from the first purification working position to the standby working position), the user can control the flow rate of the raw water flowing to the filter device 20K by adjusting the coincidence degree of the sixth passage 106K and the first passage 101K. Further, the second passage 102K and the third passage 103K extend along the first fluid control surface 1210K, and the second passage 102K and the third passage 103K extend in the same direction, so that when the flat valve 10K is switched from the standby working position to the second purification working position (or switched from the second purification working position to the standby working position), the user can control the flow rate of the raw water flowing to the filter device 20K by adjusting the coincidence degree of the sixth passage 106K and the eighth passage 108K. Accordingly, the fourth passage 104K and the fifth passage 105K correspond to each other, and the second passage 102K and the third passage 103K correspond to each other. It can be understood that when the user adjusts the coincidence degree of the sixth passage 106K and the first passage 101K, the coincidence degree of the seventh passage 107K and the fourth passage 104K (and the fifth passage 105K) is also adjusted accordingly; when the user adjusts the coincidence degree of the sixth passage 106K and the eighth passage 108K, the coincidence degree of the seventh passage 107K and the second passage 102K (and the third passage 103K) is also adjusted accordingly. Therefore, the user can adjust the water inlet and water outlet of the water purifier 2 according to the first embodiment of the present application, so as to realize the stepless flow control of the water purifier 2 according to the first embodiment of the present application.In other words, when the flat valve 10K switches from the standby working position to the first purifying working position or from the standby working position to the second purifying working position, the degree of coincidence of the passages (the sixth passage 106K and the seventh passage 107K) of the moving valve disc 122K and the passages (the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K and the eighth passage 108K) of the fixed valve disc 121K can be adjusted by rotating the moving valve disc 122K around the center of the moving valve disc 122K, so as to realize the stepless flow control of the water inlet and outlet of the water purifier 2. Preferably, the second passage 102K and the third passage 103K are both located inside the first passage 101K, the fourth passage 104K and the fifth passage 105K are both located inside the eighth passage 108K, and the second passage 102K is located inside the third passage 103K, and the fourth passage 104K is located inside the fifth passage 105K. Alternatively, the second passage 102K and the third passage 103K are both located inside the first passage 101K, the fourth passage 104K and the fifth passage 105K are both located inside the eighth passage 108K, and the third passage 103K is located inside the second passage 102K, and the fifth passage 105K is located inside the fourth passage 104K. Preferably, the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K and the eighth passage 108K are all arc-shaped, and the sixth passage 106K and the seventh passage 107K are both arc-shaped. More preferably, the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K and the eighth passage 108K all extend arc-shapedly around the center of the first fluid control surface 1210K of the fixed valve disc 121K of the flat valve 10K, and the sixth passage 106K and the seventh passage 107K both extend arc-shapedly around the center of the second fluid control surface 1220K of the moving valve disc 122K. Most preferably, the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K and the eighth passage 108K all extend arc-shapedly around the center part 12101K of the first fluid control surface 1210K of the fixed valve disc 121K of the flat valve 10K, the sixth passage 106K and the seventh passage 107K both extend arc-shapedly around the center area 12201K of the second fluid control surface 1220K of the moving valve disc 122K, and the fourth passage 104K and the fifth passage 105K correspond to the same central angle, and the second passage 102K and the third passage 103K correspond to the same central angle, so as to facilitate the stepless control of the water flow by the flat valve 10K.Optionally, the first fluid control surface 1210K is circular, and the second passage 102K, the third passage 103K, the fourth passage 104K and the fifth passage 105K extend along a tangential direction of the first fluid control surface 1210K. More preferably, the sixth passage 106K and the seventh passage 107K are arranged at two opposite positions of the dynamic valve plate 122K. More preferably, the sixth passage 106K corresponds to a circular central angle equal in size to that of the first passage 101K, the seventh passage 107K corresponds to a circular central angle equal in size to that of the fourth passage 104K, and / or the sixth passage 106K corresponds to a circular central angle equal in size to that of the eighth passage 108K, and the seventh passage 107K corresponds to a circular central angle equal in size to that of the second passage 102K, to facilitate the stepless control of water flow by the planar valve 10K. Most preferably, the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K, the sixth passage 106K, the seventh passage 107K and the eighth passage 108K correspond to circular central angles equal in size.

[0284] It can be understood that the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K and the eighth passage 108K of the planar valve 10K of the water purifier 2 according to the first embodiment of the present application are distributed on the first fluid control surface 1210K of the fixed valve plate 121K of the planar valve 10K, so that when the moving valve plate 122K of the planar valve 10K of the water purifier 2 rotates relative to the fixed valve plate 121K to switch the planar valve 10K from the standby working position to the first purification working position (or from the first purification working position to the standby working position), or from the standby working position to the second purification working position (or from the second purification working position to the standby working position), the moving valve plate 122K of the planar valve 10K can rotate relative to the fixed valve plate 121K to realize stable conduction of the flow passage even if the working position switching is not completely switched (or in the switching process). The main reason is that when the planar valve 10K is switched from the standby working position to the first purification working position or from the first purification working position to the standby working position, in the switching process, the sixth passage 106K of the planar valve 10K is always only in stable communication with the first passage 101K, and the seventh passage 107K of the planar valve 10K is always only in stable communication with the fourth passage 104K and the fifth passage 105K, respectively; when the planar valve 10K is switched from the standby working position to the second purification working position or from the second purification working position to the standby working position, in the switching process, the sixth passage 106K of the planar valve 10K is always only in stable communication with the eighth passage 108K, and the seventh passage 107K of the planar valve 10K is always only in stable communication with the second passage 102K and the third passage 103K, respectively. The sixth passage 106K of the planar valve 10K is always only in stable communication with the first passage 101K, the seventh passage 107K of the planar valve 10K is always only in stable communication with the fourth passage 104K and the fifth passage 105K, respectively, and the sixth passage 106K of the planar valve 10 is always only in stable communication with the eighth passage 108K, and the seventh passage 107K of the planar valve 10K is always only in stable communication with the second passage 102K and the third passage 103K, respectively, which ensures that there is no cross flow when the planar valve 10K is switched from the standby working position to the first purification working position or from the first purification working position to the standby working position, and from the standby working position to the second purification working position or from the second purification working position to the standby working position, thereby ensuring stepless control of the flow of water flowing through the control valve 10K during the working position switching process.

[0285] As shown in the accompanying drawings FIGS. 11A-12FAs shown, notably, when the user needs to switch the water purifier 2 from the backwashing working state to the second purifying working state, the user only needs to rotate the moving valve disc 122K of the flat valve 10K counterclockwise by one equal angle, so that the first area 2001K of the second fluid control face 1220K of the moving valve disc 122K is opposite the third part 1203K of the first fluid control face 1210K of the fixed valve disc 121K; when the user needs to switch the water purifier 2 from the second purifying working state to the standby working state, the user only needs to rotate the moving valve disc 122K of the flat valve 10K counterclockwise by one equal angle again, so that the first area 2001K of the second fluid control face 1220K of the moving valve disc 122K is opposite the second part 1202K of the first fluid control face 1210K of the fixed valve disc 121K; when the user needs to switch the water purifier 2 from the standby working state to the first purifying working state, the user only needs to rotate the moving valve disc 122K of the flat valve 10K counterclockwise by one equal angle again, so that the first area 2001K of the second fluid control face 1220K of the moving valve disc 122K is opposite the first part 1201K of the first fluid control face 1210K of the fixed valve disc 121K. In other words, the structure of the flat valve 10K of the water purifier 2 makes the backwashing working state, the second purifying working state, the standby working state and the first purifying working state of the water purifier 2 continuously distributed, so that the complete switching between the adjacent working states of the backwashing working state, the second purifying working state, the standby working state and the first purifying working state of the water purifier 2 can be realized only by rotating the moving valve disc 122K of the flat valve 10K by one equal angle. The switching mode between the four working states of the water purifier 2 determined by the structure of the flat valve 10K of the water purifier 2 makes the switching between the four working states of the water purifier 2 more in line with the use habits of the user and less likely to cause the user to switch the working state due to different rotation angles. It can be understood that, since the extension part 12102K and the edge part 12103K of the first fluid control face 1210K of the flat valve 10K of the water purifier 2 are quartered, the extension area 12202K and the edge area 12203K of the second fluid control face 1220K of the moving valve disc 122K of the flat valve 10K are quartered, accordingly, the water purifier 2, the moving valve disc 122K of the flat valve 10K is rotated by 90 degrees for each working state switching. In other words, one equal angle of the moving valve disc 122K and the fixed valve disc 121K of the flat valve 10K is 90 degrees.Optionally, the extension 12102K and the edge 12103K of the first fluid control surface 1210K are counter-clockwise bisected into the first portion 1201K, the second portion 1202K, the third portion 1203K and the fourth portion 1204K, and the extension area 12202K and the edge area 12203K of the second fluid control surface 1220K of the moving valve disc 122K of the flat valve 10K are counter-clockwise bisected into the first area 2001K, the second area 2002K, the third area 2003K and the fourth area 2004K. At this time, the structure of the flat valve 10K of the water purifier 2 of the present application is such that the first purification working state, the standby working state, the second purification working state and the backwashing working state of the water purifier 2 are continuously distributed, so that the switching between the adjacent working states of the first purification working state, the standby working state, the second purification working state and the backwashing working state of the water purifier 2 of the present application can be realized by rotating the moving valve disc 122K of the flat valve 10K by one bisected angle. In addition, as mentioned above, when switching from the standby working state to the first purification working state (or the second purification working state) of the water purifier 2 according to the first embodiment of the present application, the stepless control of the flow rate of the water inlet and outlet of the water purifier 2 of the present application can be realized by adjusting the degree of coincidence of the passages (the sixth passage 106K and the seventh passage 107K) of the moving valve disc 122K and the passages (the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K, the fifth passage 105K and the eighth passage 108K) of the fixed valve disc 121K. However, when switching from the standby working state to the first purification working state (or the second purification working state) of the water purifier 2 of the present application, the state switching can also be realized by rotating the moving valve disc 122K by one bisected angle, so that the sixth passage 106K of the moving valve disc 122K is directly opposite the first passage 101K (or the eighth passage 108K) of the fixed valve disc 121, and the seventh passage 107K is directly opposite the fourth passage 104K and the fifth passage 105K (or the second passage 102K and the third passage 103K). At this time, the flow rate of the water inlet and outlet of the water purifier 2 of the present application is the largest. It can be understood that the water purifier 2 can also be switched from the first purification working state to the standby working state (or from the second purification working state to the standby working state) quickly by rotating by one bisected angle.

[0286] As shown in the drawings FIGS. 9A-9F and FIGS. 11A-11DAs shown, according to the first embodiment of the present application, the present application further provides a valve disc assembly for a flat valve of a water purifier, which comprises a fixed valve disc 121K and a movable valve disc 122K, wherein the fixed valve disc 121K has a first fluid control surface 1210K, the movable valve disc 122K has a second fluid control surface 1220K, the movable valve disc 122K and the fixed valve disc 121K are arranged in the valve cavity 110K, the second fluid control surface 1220K of the movable valve disc 122K is arranged on the first fluid control surface 1210K of the fixed valve disc 121K, and the movable valve disc 122K is arranged to be rotatable relative to the fixed valve disc 121K, the flat valve 10K has a first passage 101K, a second passage 102K, a third passage 103K, a fourth passage 104K, a fifth passage 105K, a sixth passage 106K and a seventh passage 107K, the first passage 101K, the second passage 102K, the third passage 103K, the fourth passage 104K and the fifth passage 105K are arranged in the fixed valve disc 121K and extend from the first fluid control surface 1210K of the fixed valve disc 121K respectively, the sixth passage 106K and the seventh passage 107K are arranged in the movable valve disc 122K and extend from the second fluid control surface 1220K of the movable valve disc 122K respectively, the first passage 101K is in communication with the first opening 1101K, the second passage 102K is in communication with the second opening 1102K, the third passage 103K is in communication with the third opening 1103K, the fourth passage 104K is in communication with the fourth opening 1104K, the fifth passage 105K is in communication with the fifth opening 1105K, and the sixth passage 106K is in communication with the raw water inlet 1106K. Preferably, the raw water inlet 1106K and the sixth passage 106K are in communication with the valve cavity 110K respectively, so that the sixth passage 106K is in communication with the raw water inlet 1106K. More preferably, the seventh passage 107K of the movable valve disc 122K is a through blind hole. The flat valve 10K further has an eighth passage 108K, which is arranged in the fixed valve disc 121K and extends from the first fluid control surface 1210K of the fixed valve disc 121K, and the eighth passage 108K is in communication with the first opening 1101K. The flat valve 10K further has a ninth passage 109K, a tenth passage 1010K and an eleventh passage 1011K, which are arranged in the fixed valve disc 121K and extend from the first fluid control surface 1210K of the fixed valve disc 121K respectively, the ninth passage 109K is in communication with the blowdown opening 1109K, the tenth passage 1010K is in communication with the second opening 1102K, and the eleventh passage 1011K is in communication with the first opening 1101K.

[0287] Attached image FIGS. 13-15D The illustration shows an optional embodiment of the filtration device 20K of the water purifier 2 according to the first embodiment of the present invention. The filtration device 20T includes a housing 21K, a primary filter element 22K, and a secondary filter element 23T. The housing 21K forms a first receiving cavity 210K, and both the primary filter element 22K and the secondary filter element 23T are disposed within the first receiving cavity 210K of the housing 21K. The housing 21K and the primary filter element 22K form a raw water channel 2101K between them, and the primary filter element 22K and the secondary filter element 23T form a purified water channel 2201T between them. The secondary filter element 23T has a purified water outlet 2301T. (See attached figures.) FIGS. 13-15D As shown, further, in the water purifier 2 of the first embodiment of the present invention, the primary filter element 22K of the filtration device 20T forms a second receiving cavity 220K, and the secondary filter element 23T is disposed within the second receiving cavity 220K of the primary filter element 22K (correspondingly, the purified water channel 2201T can be considered as part of the second receiving cavity 220K). Accordingly, since the secondary filter element 23T is disposed within the second receiving cavity 220K of the primary filter element 22K, when raw water flows into the raw water channel 2101K under water pressure and is treated by the primary filter element 22K, the purified water produced by the primary filter element 22K can flow to the secondary filter element 23T under water pressure and be treated by the secondary filter element 23T to obtain cleaner secondary purified water. The secondary purified water flows out from the purified water outlet 2301T under water pressure to be provided.

[0288] As shown in the attached image. FIGS. 13-15DAs shown, the secondary filter element 23T of the filter device 20T of the water purifier 2 according to the first embodiment of the present application comprises a set of ultrafiltration membrane filaments 231T and a collecting tube 233T, wherein the ultrafiltration membrane filaments 231T and the collecting tube 233T are both arranged in the second accommodating cavity 220K of the primary filter element 22K, and the ultrafiltration membrane filaments 231T are arranged around the collecting tube 233T, wherein the collecting tube 233T has at least one water collecting hole 2330T and a collecting channel 2331T, and the collecting channel 2331T is arranged to communicate with the water collecting hole 2330T and the second communication opening 202K of the filter device 20T respectively, so that the purified water generated by the primary filter element 22K can flow to the ultrafiltration membrane filaments 231T through the purified water channel 2201T under the action of water pressure, and flow to the collecting tube 233T through the gaps between the ultrafiltration membrane filaments 231T, and be collected through the water collecting hole 2330T of the collecting tube 233T and flow to the second communication opening 202K of the filter device 20T through the collecting channel 2331T. It can be understood that when the purified water generated by the primary filter element 22K flows to the collecting tube 233T through the gaps between the ultrafiltration membrane filaments 231T and the purified water channel 2201T, the purified water generated by the primary filter element 22K has a flushing effect on the ultrafiltration membrane filaments 231T of the secondary filter element 23T, so that the ultrafiltration membrane filaments 231T of the secondary filter element 23T have better filtering effect and prolong the service life of the secondary filter element 23T. Further, when backwashing the primary filter element 22K of the filter device 20T, raw water flows into the purified water channel 2201T through the collecting channel 2331T of the collecting tube 233T and the water collecting hole 2330T of the collecting tube 233T from the second communication opening 202K, backwashes the primary filter element 22K, and the generated sewage flows to the first communication opening 201K from the raw water channel 2101K. Further, each ultrafiltration membrane filament 231T of the secondary filter element 23T forms a filament channel 2310T, and the filament channels 2310T of the ultrafiltration membrane filaments 231T of the secondary filter element 23T all communicate with the purified water outlet 2301T of the secondary filter element 23T.

[0289] As shown in the drawings FIGS. 13-15DAs shown, the filter device 20T of the water purifier 2 according to the first embodiment of the present application further comprises a base 24T, wherein the secondary filter element 23T is disposed in the base 24T, and the base 24T forms a first water cavity 2401T and a second water cavity 2402T, wherein the first water cavity 2401T of the base 24T is respectively communicated with the purified water outlet 2301T of the secondary filter element 23T and the third communication opening 203K of the filter device 20T, and the second water cavity 2402T is respectively communicated with the collecting channel 2331T of the collecting pipe 233T of the secondary filter element 23T and the second communication opening 202K of the filter device 20T. In other words, the membrane filament channel 2310T of the ultrafiltration membrane filament 231T of the secondary filter element 23T is communicated with the third communication opening 203K of the filter device 20T through the purified water outlet 2301T of the secondary filter element 23T and the first water cavity 2401T of the base 24T, so that the secondary purified water generated by the secondary filter element 23T can flow out from the third communication opening 203K; the collecting channel 2331T of the collecting pipe 233T of the secondary filter element 23T is communicated with the second communication opening 202K of the filter device 20T through the second water cavity 2402T of the base 24T, so that the purified water generated by the primary filter element 22K can flow out from the second communication opening 202K. It can be understood that when backwashing the primary filter element 22K of the filter device 20T, raw water flows into the filter device 20T from the second communication opening 202K of the filter device 20T, flows into the purified water channel 2201T of the filter device 20T through the second water cavity 2402T of the base 24T, the collecting channel 2331T and the collecting hole 2330T of the collecting pipe 233T. Accordingly, the secondary filter element 23T of the filter device 20T is an external pressure type ultrafiltration filter element. Preferably, the second communication opening 202K and the third communication opening 203K are both disposed in the base 24T. More preferably, the collecting pipe 233T and the secondary filter element 23T are both water-tightly disposed in the base 24T, and the first water cavity 2401T is formed between the secondary filter element 23T and the base 24T, and the second water cavity 2402T is formed between the collecting pipe 233T and the base 24T. Alternatively, the primary filter element 22K is water-tightly disposed in the housing 21K, and the secondary filter element 23T is water-tightly disposed in the base 24T.

[0290] As shown in the drawings FIGS. 13-15DAs shown, the base 24T of the filter device 20T of the water purifier 2 according to the first embodiment of the present application comprises a base portion 241K, a first spacing portion 242T and a second spacing portion 243T, wherein the first spacing portion 242T and the second spacing portion 243T are both arranged on the base portion 241K and extend from the base portion 241K, wherein the first water cavity 2401T is arranged between the first spacing portion 242T and the second spacing portion 243T, and the second spacing portion 243T surrounds to form the second water cavity 2402T. More preferably, the first spacing portion 242T and the second spacing portion 243T are both annular, and the first spacing portion 242T is arranged outside the second spacing portion 243T. Accordingly, the second spacing portion 243T is arranged between the first water cavity 2401T and the second water cavity 2402T, so as to separate the first water cavity 2401T and the second water cavity 2402T.

[0291] As shown in the drawings, FIGS. 13-15D As shown, the water purification passage 2201T of the filter device 20T, the water collecting hole 2330T, the water collecting passage 2331T, the second water cavity 2402T of the base 24T, the second communication opening 202K of the filter device 20T of the water purifier 2 according to the first embodiment of the present application form a first-stage water purification water route, and the membrane filament passage 2310T of the ultrafiltration membrane filament 231T of the secondary filter element 23T, the water purification outlet 2301T of the secondary filter element 23T, the first water cavity 2401T of the base 24T and the third communication opening 203K of the filter device 20T form a second-stage water purification water route. It can be understood that the first-stage water purification water route and the second-stage water purification water route are separated from each other, so as to prevent the water in the first-stage water purification water route and the second-stage water purification water route from mixing, in other words, the purified water generated by the first-stage filter element 22K is prevented from mixing into the purified water generated by the secondary filter element 23T.

[0292] As shown in the drawings, FIGS. 13-15D As shown, the secondary filter element 23T of the filter device 20T of the water purifier 2 according to the first embodiment of the present application further comprises a housing 232T, wherein the ultrafiltration membrane filament 231T of the secondary filter element 23T is arranged in the housing 232T, and the housing 232T has at least one water inlet 2320T, wherein the water inlet 2320T of the housing 232T communicates the inside and outside of the housing 232T, so that when the water purifier 2 of the present application is in the first purification working state, the purified water generated by the first-stage filter element 22K can flow to the ultrafiltration membrane filament 231T through the water inlet 2320T of the housing 232T under the action of water pressure. Therefore, the water inlet 2320T of the housing 232T of the secondary filter element 23T can be regarded as a part of the water purification passage 2201T of the filter device 20T.

[0293] As shown in the drawings FIGS. 13-15D , correspondingly, when the filter device 20T of the water purifier 2 according to the first embodiment of the present application is used to treat raw water, the user can control the raw water to flow to the first communication opening 201K of the filter device 20T through the control valve 10K, the raw water flows to the raw water channel 2101K of the filter device 20T under the action of water pressure, the purified water generated after the raw water is treated by the primary filter element 22K under the action of water pressure flows to the water purification channel 2201T, at this time, if the purified water in the water purification channel 2201T can flow freely through the second communication opening 202K of the filter device 20T under the control of the control valve 10K, and the purified water generated by the secondary filter element 23T cannot flow freely to the third communication opening 203K, then the purified water generated by the primary filter element 22K will flow out of and be provided from the second communication opening 202K under the action of water pressure. Correspondingly, at this time, the water purifier 2 according to the first embodiment of the present application is in a second purification working state, the purified water generated by the primary filter element 22K will flow through the water collecting hole 2330T, the water collecting channel 2331T, the second water cavity 2402T, and the second communication opening 202K of the water collecting pipe 233T in sequence and be provided. On the other hand, if the purified water in the water purification channel 2201T cannot flow freely through the second communication opening 202K of the filter device 20T under the control of the control valve 10K, and the purified water generated by the secondary filter element 23T can flow freely to the third communication opening 203K, then the purified water generated by the primary filter element 22K will be further purified by the secondary filter element 23T under the action of water pressure, the purified water generated by the secondary filter element 23T will flow out of the membrane wire channel 2310T, and then flow out of and be provided from the water purification outlet 2301T of the secondary filter element 23T, the first water cavity 2401T, and the third communication opening 203K. Correspondingly, at this time, the water purifier 2 according to the first embodiment of the present application is in a first purification working state. As shown in the drawings FIGS. 13-15DAs shown, further, when the control valve 10K of the water purifier 2 according to the first embodiment of the present application controls raw water to backwash the primary filter element 22K of the filtering device 20T, the user can control raw water to flow to the second communication opening 202K of the filtering device 20T through the control valve 10K, and raw water flows to the water purification channel 2201T of the filtering device 20T under the action of water pressure, at which time, under the control of the control valve 10K, purified water generated by the secondary filter element 23T cannot freely flow to the third communication opening 203K, and raw water in the water purification channel 2201T reversely washes the primary filter element 22K under the action of water pressure, and generated sewage flows to the first communication opening 201K of the filtering device 20T from the raw water channel 2101K under the action of water pressure, and flows out from the first communication opening 201K under the control of the control valve 10K. Accordingly, at this time, the water purifier 2 according to the first embodiment of the present application is in a backwashing working state, that is, raw water flows into the water purification channel 2201T through the second communication opening 202K, the second water cavity 2402T, the flow collection channel 2331T, and the water collection hole 2330T, reversely washes the primary filter element 22K, and generated sewage flows to the first communication opening 201K from the raw water channel 2101K.

[0294] As shown in FIG. 1, the water purifier 2 according to the first embodiment of the present application further has a standby working state, wherein when the water purifier 2 according to the present application is in the standby working state, the user can control raw water not to flow to the filtering device 20T through the control valve 10K. FIGS. 13-15D As shown in FIG. 1, the water purifier 2 according to the first embodiment of the present application further has a standby working state, wherein when the water purifier 2 according to the present application is in the standby working state, the user can control raw water not to flow to the filtering device 20T through the control valve 10K.

[0295] As shown in FIG. 1, the water purifier 2 according to the first embodiment of the present application further has a standby working state, wherein when the water purifier 2 according to the present application is in the standby working state, the user can control raw water not to flow to the filtering device 20T through the control valve 10K. FIGS. 16-18D As shown in FIG. 1, the water purifier 2 according to the first embodiment of the present application further has a standby working state, wherein when the water purifier 2 according to the present application is in the standby working state, the user can control raw water not to flow to the filtering device 20T through the control valve 10K. FIGS. 16-18DAs shown, further, the first filter element 22K of the filtering device 20Y of the water purifier 2 according to the first embodiment of the present application forms a second accommodating cavity 220K, and the second filter element 23Y is arranged in the second accommodating cavity 220K of the first filter element 22K (correspondingly, the purified water passage 2201Y can be regarded as a part of the second accommodating cavity 220K). Correspondingly, since the second filter element 23Y is arranged in the second accommodating cavity 220K of the first filter element 22K, when raw water flows into the first filter element 22K from the raw water passage 2101K under the action of water pressure and is treated by the first filter element 22K, the purified water generated by the first filter element 22K can flow to the second filter element 23Y under the action of water pressure and be treated by the second filter element 23Y to obtain second purified water which is cleaner, and the second purified water flows out of the purified water outlet 2301Y under the action of water pressure to be provided.

[0296] As shown in the drawings FIGS. 16-18DAs shown, the secondary filter element 23Y of the filter device 20Y of the water purifier 2 according to the first embodiment of the present application comprises a plurality of ultrafiltration membrane filaments 231Y and a collecting pipe 233Y, wherein the ultrafiltration membrane filaments 231Y and the collecting pipe 233Y of the secondary filter element 23Y are arranged in the second accommodating cavity 220K of the primary filter element 22K, and the ultrafiltration membrane filaments 231Y are arranged around the collecting pipe 233Y, wherein each of the ultrafiltration membrane filaments 231Y forms a membrane filament passage 2310Y, the collecting pipe 233Y has at least one water collecting hole 2330Y and a collecting passage 2331Y, the membrane filament passage 2310Y of each of the ultrafiltration membrane filaments 231Y is connected to the purified water passage 2201Y and the second communication opening 202K respectively, and the collecting passage 2331Y is connected to the water collecting hole 2330Y and the purified water outlet 2301Y of the secondary filter element 23Y respectively, so that the purified water generated by the primary filter element 22K can flow to the ultrafiltration membrane filaments 231Y through the purified water passage 2201Y under the action of water pressure, and then flow to the second communication opening 202K of the filter device 20Y through the membrane filament passages 2310Y of the ultrafiltration membrane filaments 231Y. Correspondingly, the purified water outlet 2301Y of the secondary filter element 23Y forms a water outlet of the collecting passage 2331Y. It can be understood that when the second communication opening 202K of the filter device 20Y is blocked, the purified water generated by the primary filter element 22K flows into the membrane filament passages 2310Y of the ultrafiltration membrane filaments 231Y of the secondary filter element 23Y, and under the action of water pressure, the ultrafiltration membrane filaments 231Y of the secondary filter element 23Y further filter the purified water generated by the primary filter element 22K to generate secondary purified water, the purified water generated by the secondary filter element 23Y flows to the collecting pipe 233Y through the gaps between the ultrafiltration membrane filaments 231Y, and then flows into the collecting passage 2331Y of the collecting pipe 233Y through the water collecting hole 2330Y of the collecting pipe 233Y, and then flows out from the purified water outlet 2301Y and the third communication opening 203K of the secondary filter element 23Y. In addition, when the purified water generated by the primary filter element 22K flows to the second communication opening 202K of the filter device 20Y through the membrane filament passages 2310Y of the ultrafiltration membrane filaments 231Y of the secondary filter element 23Y, the purified water generated by the primary filter element 22K has a flushing effect on the ultrafiltration membrane filaments 231Y of the secondary filter element 23Y, so that the ultrafiltration membrane filaments 231Y of the secondary filter element 23Y have better filtering effect and longer service life. Further, when the primary filter element 22K of the filter device 20Y is backwashed, raw water flows into the second communication opening 202K, flows to the purified water passage 2201Y through the membrane filament passages 2310Y of the ultrafiltration membrane filaments 231Y of the secondary filter element 23Y, and the raw water reversely washes the primary filter element 22K under the action of water pressure, and the generated sewage flows to the first communication opening 201K from the raw water passage 2101K.

[0297] As shown in the drawings FIGS. 16-18D The ultrafiltration membrane wire 231Y of the secondary filter element 23Y of the filtering device 20Y of the water purifier 2 according to the first embodiment of the present application comprises a first end 2311Y, a second end 2312Y and an ultrafiltration portion 2313Y extending between the first end 2311Y and the second end 2312Y, wherein the first end 2311Y of the ultrafiltration membrane wire 231Y of the secondary filter element 23Y is arranged towards the primary filter element 22K, and the second end 2312Y of the ultrafiltration membrane wire 231Y of the secondary filter element 23Y is arranged towards the base 24Y of the filtering device 20Y. It can be understood that the first end 2311Y of the ultrafiltration membrane wire 231Y is in communication with the water purifying channel 2201Y, and the second end 2312Y of the ultrafiltration membrane wire 231Y is in communication with the second communication opening 202K.

[0298] As shown in the drawings FIGS. 16-18DAs shown, the secondary filter element 23Y of the filter device 20Y of the water purifier 2 according to the first embodiment of the present application further comprises a housing 232Y, a first sealing portion 234Y and a second sealing portion 235Y, wherein the housing 232Y forms a purified water cavity 2320Y and two openings 2321Y respectively communicating with the purified water cavity 2320Y, the collecting pipe 233Y further comprises an opening portion 2332Y extending from the collecting channel 2331Y, wherein the purified water outlet 2301Y is arranged at the opening portion 2332Y, the first sealing portion 234Y and the second sealing portion 235Y are sealingly arranged at the two openings 2321Y of the housing 232Y respectively, the first end 2311Y of the ultrafiltration membrane filament 231Y is sealingly arranged at the first sealing portion 234Y, the second end 2312Y is sealingly arranged at the second sealing portion 235Y, the ultrafiltration portion 2313Y is arranged in the purified water cavity 2320Y of the housing 232Y, the water collecting hole 2330Y and the collecting channel 2331Y of the collecting pipe 233Y are arranged in the purified water cavity 2320Y, and the opening portion 2332Y of the collecting pipe 233Y is arranged at the second sealing portion 235Y, so that the purified water generated by the primary filter element 22K can flow from the first end 2311Y of the ultrafiltration membrane filament 231Y into the filament channel 2310Y of the ultrafiltration membrane filament 231Y, be filtered by the ultrafiltration portion 2313Y of the ultrafiltration membrane filament 231Y to generate purified water and flow into the purified water cavity 2320Y, and then, under the action of water pressure, be collected by the water collecting hole 2330Y of the collecting pipe 233Y and flow through the collecting channel 2331Y, the opening portion 2332Y of the collecting pipe 233Y and the purified water outlet 2301Y to the third communication opening 203K. In other words, the two sealing portions 234Y, 235Y of the secondary filter element 23Y are sealingly arranged at the two opening ends of the housing 232Y respectively, and the two ends of the ultrafiltration membrane filament 231Y are sealingly arranged at the sealing portions 234Y, 235Y of the secondary filter element 23Y respectively, so that the housing 232Y, the sealing portions 234Y, 235Y of the secondary filter element 23Y form the purified water cavity 2320Y containing the ultrafiltration portion 2313Y of the ultrafiltration membrane filament 231Y, the water collecting hole 2330Y and the collecting channel 2331Y of the collecting pipe 233Y therein, so that the purified water generated by the primary filter element 22K can flow from the first end 2311Y of the ultrafiltration membrane filament 231Y into the filament channel 2310Y of the ultrafiltration membrane filament 231Y, be filtered by the ultrafiltration portion 2313Y of the ultrafiltration membrane filament 231Y to generate purified water and flow into the purified water cavity 2320Y, and then, under the action of water pressure, be collected by the water collecting hole 2330Y of the collecting pipe 233Y and flow through the collecting channel 2331Y, the opening portion 2332Y of the collecting pipe 233Y and the purified water outlet 2301Y to the third communication opening 203K.Further, when backwashing the primary filter element 22K of the filter device 20Y, raw water flows from the second communication opening 202K of the filter device 20Y, flows into the membrane filament channel 2310Y of the ultrafiltration membrane filament 231Y from the second end 2312Y of the ultrafiltration membrane filament 231Y, flows into the clean water channel 2201Y from the first end 2311Y of the ultrafiltration membrane filament 231Y, and the raw water reversely washes the primary filter element 22K under the action of water pressure, and the generated sewage flows from the raw water channel 2101K to the first communication opening 201K. It can be understood that, since the two sealing portions 234Y, 235Y of the secondary filter element 23Y are sealingly arranged at the two opening ends of the shell 232Y respectively, and the two ends of the ultrafiltration membrane filament 231Y are sealingly arranged in the sealing portions 234Y, 235Y of the secondary filter element 23Y respectively, the primary purified water generated by the primary filter element 22K in the second accommodating cavity 220K of the primary filter element 22K cannot enter the clean water cavity 2320Y of the secondary filter element 23Y. Correspondingly, the two sealing portions 234Y, 235Y of the secondary filter element 23Y and the shell 232Y are water-tightly sealed, and the ultrafiltration membrane filament 231Y and the sealing portions 234Y, 235Y of the secondary filter element 23Y are water-tightly sealed.

[0299] As shown in the accompanying drawings FIGS. 16-18DAs shown, the filter device 20Y of the water purifier 2 according to the first embodiment of the present application further comprises a base 24Y, wherein the secondary filter element 23Y is arranged in the base 24Y, and the base 24Y forms a first water cavity 2401Y and a second water cavity 2402Y, wherein the first water cavity 2401Y of the base 24Y is respectively communicated with the purified water outlet 2301Y of the secondary filter element 23Y and the third communication opening 203K of the filter device 20Y, and the second water cavity 2402Y is respectively communicated with the membrane filament passage 2310Y of the ultrafiltration membrane filament 231Y of the secondary filter element 23Y and the second communication opening 202K of the filter device 20Y. In other words, the membrane filament passage 2310Y of the ultrafiltration membrane filament 231Y of the secondary filter element 23Y is communicated with the second communication opening 202K of the filter device 20Y through the second water cavity 2402Y of the base 24Y, so that the purified water generated by the primary filter element 22K can flow out from the second communication opening 202K, and the collecting passage 2331Y of the collecting pipe 233Y of the secondary filter element 23Y is communicated with the third communication opening 203K of the filter device 20Y through the purified water outlet 2301Y of the secondary filter element 23Y and the first water cavity 2401Y of the base 24Y, so that the secondary purified water generated by the secondary filter element 23Y can flow out from the third communication opening 203K. It can be understood that when backwashing the primary filter element 22K of the filter device 20Y, raw water flows into the membrane filament passage 2310Y of the ultrafiltration membrane filament 231Y of the secondary filter element 23Y from the second communication opening 202K of the filter device 20Y through the second water cavity 2402Y of the base 24Y and the second end 2312Y of the ultrafiltration membrane filament 231Y, and flows into the purified water passage 2201Y from the first end 2311Y of the ultrafiltration membrane filament 231Y, and the raw water reversely washes the primary filter element 22K under the action of water pressure, and the generated sewage flows to the first communication opening 201K from the raw water passage 2101K. Correspondingly, the secondary filter element 23Y is an internal pressure type filter element. Preferably, the second communication opening 202K and the third communication opening 203K are arranged in the base 24Y. More preferably, the collecting pipe 233Y and the secondary filter element 23Y are respectively arranged in the base 24Y in a water-tight manner, and the second water cavity 2402Y is formed between the secondary filter element 23Y and the base 24Y, and the first water cavity 2401Y is formed between the collecting pipe 233Y and the base 24Y.

[0300] As shown in the drawings FIGS. 16-18DAs shown, the base 24Y of the filter device 20Y of the water purifier 2 according to the first embodiment of the present application comprises a base portion 241K, a first spacing portion 242Y and a second spacing portion 243Y, wherein the first spacing portion 242Y and the second spacing portion 243Y are both disposed on and extend from the base portion 241K, and the second water cavity 2402Y is disposed between the first spacing portion 242Y and the second spacing portion 243Y, and the first spacing portion 242Y surrounds to form the first water cavity 2401Y. More preferably, the first spacing portion 242Y and the second spacing portion 243Y are both annular, and the second spacing portion 243Y is disposed outside the first spacing portion 242Y. Accordingly, the first spacing portion 242Y is disposed between the first water cavity 2401Y and the second water cavity 2402Y, thereby separating the first water cavity 2401Y and the second water cavity 2402Y.

[0301] As shown in the drawings, FIGS. 16-18D As shown, the water purifying passage 2201Y of the filter device 20Y, the membrane filament passage 2310Y, the second water cavity 2402Y of the base 24Y, the second communication opening 202K of the filter device 20Y of the water purifier 2 according to the first embodiment of the present application form a first-stage water purifying water path, and the water collecting hole 2330Y, the water collecting passage 2331Y, the water purifying outlet 2301Y of the second-stage filter element 23Y, the first water cavity 2401Y of the base 24Y and the third communication opening 203K of the filter device 20Y form a second-stage water purifying water path. It can be understood that the first-stage water purifying water path and the second-stage water purifying water path are separated from each other to prevent the water in the first-stage water purifying water path and the second-stage water purifying water path from mixing, in other words, to prevent the purified water generated by the first-stage filter element 22K from mixing with the purified water generated by the second-stage filter element 23Y.

[0302] As shown in the drawings, FIGS. 16-18DAs shown, correspondingly, when the filtering device 20Y of the water purifier 2 according to the first embodiment of the present application is used to treat raw water, the user can control the raw water to flow to the first communication opening 201K of the filtering device 20Y through the control valve 10K, the raw water flows to the raw water passage 2101K of the filtering device 20Y under the action of water pressure, the raw water is treated by the primary filter element 22K under the action of water pressure, and the generated purified water flows to the water purification passage 2201Y. At this time, if the purified water in the water purification passage 2201Y can freely flow through the second communication opening 202K of the filtering device 20Y under the control of the control valve 10K, and the purified water generated by the secondary filter element 23Y cannot freely flow to the third communication opening 203K, then the purified water generated by the primary filter element 22K will flow into the first end 2311Y of the ultrafiltration membrane wire 231Y under the action of water pressure, flow out of the second end 2312Y of the ultrafiltration membrane wire 231Y, and then flow out of the second communication opening 202K and be provided. Correspondingly, at this time, the water purifier 2 according to the first embodiment of the present application is in a second purification working state, and the purified water generated by the primary filter element 22K will flow through the water purification passage 2201Y, the membrane wire passage 2310Y of the ultrafiltration membrane wire 231Y, the second water cavity 2402Y, the second communication opening 202K in sequence, and be provided. On the other hand, if the purified water in the water purification passage 2201Y cannot freely flow through the second communication opening 202K of the filtering device 20Y under the control of the control valve 10K, and the purified water generated by the secondary filter element 23Y can freely flow to the third communication opening 203K, then the purified water generated by the primary filter element 22K will flow into the first end 2311Y of the ultrafiltration membrane wire 231Y under the action of water pressure, be treated by the ultrafiltration of the ultrafiltration membrane wire 231Y, be collected through the water collecting hole 2330Y and the flow collecting passage 2331Y of the flow collecting pipe 233Y, and then flow out of the water purification outlet 2301Y of the secondary filter element 23Y, the first water cavity 2401Y, the third communication opening 203K, and be provided. Correspondingly, at this time, the water purifier 2 according to the first embodiment of the present application is in a first purification working state. As shown in FIG. 1, FIGS. 16-18DAs shown, further, when the control valve 10K of the water purifier 2 according to the first embodiment of the present application controls raw water to backwash the primary filter element 22K of the filtering device 20Y, the user can control the control valve 10K to control raw water to flow to the second communication opening 202K of the filtering device 20Y, to flow into the water purifying channel 2201Y through the second water cavity 2402Y and the membrane channel 2310Y of the ultrafiltration membrane 231Y, at this time, under the control of the control valve 10K, the purified water generated by the secondary filter element 23Y cannot freely flow to the third communication opening 203K, the raw water in the water purifying channel 2201Y reversely washes the primary filter element 22K under the action of water pressure, the generated sewage flows from the raw water channel 2101K to the first communication opening 201K of the filtering device 20Y under the action of water pressure, and flows out from the first communication opening 201K under the control of the control valve 10K. Accordingly, at this time, the water purifier 2 according to the first embodiment of the present application is in a backwashing working state.

[0303] As shown in FIG. 1, FIGS. 19-27F As shown, further, the water purifier 2 according to the first embodiment of the present application also has a standby working state, wherein when the water purifier 2 according to the present application is in the standby working state, the user can control the control valve 10K to control raw water not to flow to the filtering device 20Y.

[0304] As shown in FIG. 1, FIGS. 19-21F As shown, an optional embodiment of the control valve 10K of the water purifier 2 according to the first embodiment of the present application, wherein the control valve 10T comprises a valve body 11K and a valve core 12T, wherein the valve body 11K forms a valve cavity 110K, a first opening 1101K, a second opening 1102K, a third opening 1103K, a fourth opening 1104K, a fifth opening 1105K, a raw water inlet 1106K and a sewage outlet 1109K, wherein the valve core 12T is arranged in the valve cavity 110K, wherein the first opening 1101K of the valve body 11K is adapted to be in communication with the first communication opening 201K of the filtering device 20K, the second opening 1102K of the valve body 11K is adapted to be in communication with the second communication opening 202K of the filtering device 20K, the fourth opening 1104K of the valve body 11K is adapted to be in communication with the third communication opening 203K of the filtering device 20K, the fifth opening 1105K of the valve body 11K is adapted to be in communication with a first water outlet 100K, the third opening 1103K of the valve body 11K is adapted to be in communication with a second water outlet 200K, and the raw water inlet 1106K of the valve body 11K is adapted to be in communication with a raw water source.

[0305] As shown in FIG. 1, FIG. 25A and FIGS. 19-21FAs shown, the control valve 10T of the water purifier 2 according to the first embodiment of the present application has a first purifying working position, wherein when the control valve 10T is in the first purifying working position, the valve core 12T of the control valve 10T forms a first communication passage 1001T and a second communication passage 1002T, wherein the first communication passage 1001T is in communication with the first opening 1101K of the valve body 11K and the raw water inlet 1106K respectively, and the second communication passage 1002T is in communication with the fourth opening 1104K and the fifth opening 1105K of the valve body 11K respectively. Further, when the control valve 10T is in the first purifying working position, the second opening 1102K and the third opening 1103K of the valve body 11K are not in communication. In other words, when the control valve 10T is in the first purifying working position, the second opening 1102K and the third opening 1103K of the valve body 11K cannot be in communication. Accordingly, when the control valve 10T is in the first purifying working position, raw water or tap water flows into the control valve 10T from the raw water inlet 1106K of the valve body 11K under the action of water pressure, and then flows to the first opening 1101K of the valve body 11K through the first communication passage 1001T, so as to further flow into the raw water passage 2101K of the filter device 20K from the first communication opening 201K of the filter device 20K. The raw water flowing into the raw water passage 2101K is filtered by the primary filter element 22K, and then the purified water generated by the primary filter element 22K flows into the purified water passage 2201K. Further, when the control valve 10T is in the first purifying working position, the second opening 1102K and the third opening 1103K of the valve body 11K cannot be in communication, so that the purified water in the purified water passage 2201K cannot flow freely through the second communication opening 202K of the filter device 20K under the control of the control valve 10T. Therefore, the purified water generated by the primary filter element 22K is further purified by the secondary filter element 23K, and the purified water generated by the secondary filter element 23K flows out from the third communication opening 203K through the purified water outlet 2301K, and then flows through the fourth opening 1104K, the second communication passage 1002T and the fifth opening 1105K in sequence, so that the purified water generated by the secondary filter element 23K can be provided through the first water outlet 100K which is in communication with the fifth opening 1105K. Preferably, the secondary filter element 23K is an ultrafiltration filter element. Accordingly, the purified water generated by the secondary filter element 23K can be directly drunk. It can be understood that when the control valve 10T of the water purifier 2 according to the first embodiment of the present application is controlled to be in the first purifying working position, the water purifier 2 according to the present application is controlled to be in the first purifying working state thereof.

[0306] As shown in the accompanying drawings FIG. 25B and FIGS. 19-21FAs shown, the control valve 10T of the water purifier 2 according to the first embodiment of the present application further has a second purification working position, wherein when the control valve 10T is in the second purification working position, the spool 12T of the control valve 10T forms a third communicating passage 1003T and a fourth communicating passage 1004T, wherein the third communicating passage 1003T is in communication with the first opening 1101K and the raw water inlet 1106K of the valve body 11K respectively, and the fourth communicating passage 1004T is in communication with the second opening 1102K and the third opening 1103K of the valve body 11K respectively. Further, when the control valve 10T is in the second purification working position, the fourth opening 1104K and the fifth opening 1105K of the valve body 11K are not in communication. In other words, when the control valve 10T is in the second purification working position, the fourth opening 1104K and the fifth opening 1105K of the valve body 11K cannot be in communication. Accordingly, when the control valve 10T is in the second purification working position, raw water or tap water flows into the valve body 11K of the control valve 10T from the raw water inlet 1106K under the action of water pressure, flows to the first opening 1101K of the valve body 11K through the third communicating passage 1003T, and further flows into the raw water passage 2101K of the filter device 20K from the first communicating opening 201K of the filter device 20K. The raw water flowing into the raw water passage 2101K is filtered by the primary filter element 22K, and the purified water produced by the primary filter element 22K flows into the purified water passage 2201K. At this time, since the second opening 1102K and the third opening 1103K of the valve body 11K are in communication through the fourth communicating passage 1004T, the purified water produced by the primary filter element 22K flows into the purified water passage 2201K, flows out from the second communicating opening 202K, and flows through the second opening 1102K, the fourth communicating passage 1004T and the third opening 1103K in sequence, so that the purified water produced by the primary filter element 22K can be provided through the second water outlet 200K in communication with the third opening 1103K. It can be understood that when the control valve 10T of the water purifier 2 according to the first embodiment of the present application is controlled to be in the second purification working position, the water purifier 2 according to the first embodiment of the present application is controlled to be in the second purification working state.

[0307] As shown in the drawings FIG. 25C and FIGS. 19-21FAs shown, the control valve 10T of the water purifier 2 according to the first embodiment of the present invention further has a standby working position, wherein when the water purifier 2 is in the standby working position, the control valve 10T controls the raw water not to flow to the filter device 20K and also does not provide raw water or purified water to the user. Further, when the control valve 10T is in the standby working position, the raw water inlet 1106K is not connected to the first opening 1101K, the second opening 1102K, the third opening 1103K, the fourth opening 1104K, and the fifth opening 1105K. It can be understood that when the control valve 10T of the water purifier 2 according to the first embodiment of the present invention is controlled to be in the standby working position, the water purifier 2 is controlled to be in its standby working state.

[0308] As shown in the attached image. FIG. 25D and FIGS. 19-27F As shown, the control valve 10T of the water purifier 2 according to the first embodiment of the present invention further has a backwashing working position, wherein when the control valve 10T is in the backwashing working position, the valve core 12T of the control valve 10T forms a fifth connecting channel 1005T and a sixth connecting channel 1006T, wherein the fifth connecting channel 1005T is connected to the second opening 1102K and the raw water inlet 1106K of the valve body 11K respectively, and the sixth connecting channel 1006T is connected to the first opening 1101K and the sewage outlet 1109K of the valve body 11K respectively. Correspondingly, when the control valve 10T is in the backwashing working position, raw water or tap water flows in from the raw water inlet 1106K of the valve body 11K of the control valve 10T under water pressure, flows through the fifth connecting channel 1005T to the second opening 1102K of the valve body 11K, and further flows into the filter device 20K from the second connecting opening 202K. Under water pressure, the raw water flows into the primary filter element 22K from the clean water channel 2201K of the filter device 20K. After backwashing the primary filter element 22K, the generated sewage flows into the raw water channel 2101K. At this time, since the first opening 1101K and the drain opening 1109K of the valve body 11K are connected through the sixth connecting channel 1006T, the wastewater generated by the backwashing of the primary filter element 22K by the raw water flows into the raw water channel 2101K and then flows out from the first connecting opening 201K, and sequentially flows through the first opening 1101K, the sixth connecting channel 1006T, and the drain opening 1109K, so that the wastewater generated by the backwashing of the primary filter element 22K by the raw water can be discharged through the drain opening 1109K. It can be understood that when the control valve 10T of the water purifier 2 according to the first embodiment of the present invention is controlled to be in the backwashing working position, the water purifier 2 of the present invention is controlled to be in its backwashing working state.

[0309] As shown in the attached image.FIGS. 19-27F As shown, the control valve 10T of the water purifier 2 according to the first embodiment of the present invention is a planar valve, wherein the valve core 12T of the planar valve 10T further includes a fixed valve plate 121T and a movable valve plate 122T, wherein the fixed valve plate 121T has a first fluid control surface 1210T, and the movable valve plate 122T has a second fluid control surface 1220T, wherein the movable valve plate 122T and the fixed valve plate 121T are both disposed in the valve cavity 110K, wherein the second fluid control surface 1220T of the movable valve plate 122T is disposed on the first fluid control surface 1210T of the fixed valve plate 121T, and the movable valve plate 122T is configured to be rotatable relative to the fixed valve plate 121T.

[0310] As shown in the attached image. FIG. 25A As shown, the planar valve 10T of the water purifier 2 according to the first embodiment of the present invention has a first channel 101T, a second channel 102T, a third channel 103T, a fourth channel 104T, a fifth channel 105T, a sixth channel 106T, a seventh channel 107T, and a raw water inlet channel 1012T. The first channel 101T, the second channel 102T, the third channel 103T, the fourth channel 104T, the fifth channel 105T, and the raw water inlet channel 1012T are respectively disposed on the fixed valve plate 121T and extend from the first fluid control surface 1210T of the fixed valve plate 121T. The sixth channel 106T and the seventh channel 107T are respectively disposed on the moving valve plate 122T and extend from the second fluid control surface 1220T of the moving valve plate 122T. The first channel 101T is connected to the first opening 1101K, the second channel 102T is connected to the second opening 1102K, the third channel 103T is connected to the third opening 1103K, the fourth channel 104T is connected to the fourth opening 1104K, and the fifth channel 105T is connected to the fifth opening 1105K. The raw water inlet channel 1012T is connected to the sixth channel 106T and the raw water inlet 1106K. More preferably, the sixth channel 106T and the seventh channel 107T of the moving valve plate 122T are preferably blind through-holes.

[0311] As shown in the attached image. FIGS. 27A-27B and FIG. 27AAs shown, the moving valve disc 122T of the flat valve 10T of the water purifier 2 according to the first embodiment of the present application can rotate relative to the fixed valve disc 121T so that the flat valve 10T has a first purifying working position. When the flat valve 10T of the water purifier 2 according to the first embodiment of the present application is in the first purifying working position, the sixth passage 106T of the flat valve 10T is in communication with the raw water inlet passage 1012T and the first passage 101T respectively, so as to form the first communication passage 1001T in communication with the raw water inlet 1106K and the first opening 1101K respectively, and the seventh passage 107T is in communication with the fourth passage 104T and the fifth passage 105T respectively, so as to form the second communication passage 1002T in communication with the fourth opening 1104K and the fifth opening 1105K respectively. FIG. 25B As shown, when the flat valve 10T is in the first purifying working position, the second passage 102T and the third passage 103T of the flat valve 10T are blocked (or closed) by the moving valve disc 122T. Accordingly, the first-stage purifying water produced by the first-stage filter element 22K will flow to the second-stage filter element 23K under the action of water pressure, and after being further purified by the second-stage filter element 23K, is provided through the fourth opening 1104K, the second communication passage 1002T and the fifth opening 1105K.

[0312] As shown, when the flat valve 10T is in the first purifying working position, the second passage 102T and the third passage 103T of the flat valve 10T are blocked (or closed) by the moving valve disc 122T. Accordingly, the first-stage purifying water produced by the first-stage filter element 22K will flow to the second-stage filter element 23K under the action of water pressure, and after being further purified by the second-stage filter element 23K, is provided through the fourth opening 1104K, the second communication passage 1002T and the fifth opening 1105K. FIGS. 27C-27D and FIG. 25CAs shown, the flat valve 10T of the water purifier 2 according to the first embodiment of the present application further has an eighth passage 108T, wherein the eighth passage 108T is disposed in the fixed valve plate 121T and extends from the first fluid control surface 1210T of the fixed valve plate 121T, wherein the eighth passage 108T is in communication with the first opening 1101K. The flat valve 10T of the water purifier 2 according to the first embodiment of the present application has a second purification working position, wherein when the flat valve 10T is in the second purification working position, the sixth passage 106T and the eighth passage 108T of the flat valve 10T are in communication with the raw water inlet passage 1012T and the eighth passage 108T respectively, so as to form the third communication passage 1003T which is in communication with the raw water inlet 1106K and the first opening 1101K respectively, and the seventh passage 107T is in communication with the second passage 102T and the third passage 103T respectively, so as to form the fourth communication passage 1004T which is in communication with the second opening 1102K and the third opening 1103K respectively. When the flat valve 10T of the water purifier 2 according to the first embodiment of the present application is in the second purification working position, the fourth passage 104T and the fifth passage 105T of the flat valve 10T are blocked (or closed) by the moving valve plate 122T, so that the water flow in the fourth passage 104T cannot flow freely. Accordingly, the primary purification water generated by the primary filter element 22K will flow to the second opening 1102K under the action of water pressure, and is provided through the fourth communication passage 1004T and the third opening 1103K.

[0313] As shown in the accompanying drawings FIG. 27E and FIG. 25DAs shown, the planar valve 10T of the water purifier 2 according to the first embodiment of the present application further has a standby working position, wherein when the planar valve 10T is in the standby working position, the sixth passage 106T of the planar valve 10T only communicates with the raw water inlet passage 1012T, and the seventh passage 107T is blocked by the first fluid control surface 1210T of the fixed valve disc 121T. The sixth passage 106T of the planar valve 10T only communicates with the raw water inlet passage 1012T, which results in that the raw water can only flow to the sixth passage 106T through the raw water inlet 1106K, and the seventh passage 107T is blocked by the first fluid control surface 1210T of the fixed valve disc 121T, which further cuts off the water flow through the planar valve 10T. Further, when the planar valve 10T is in the standby working position, the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T and the eighth passage 108T of the fixed valve disc 121T are respectively blocked (or closed) by the movable valve disc 122T. That is, when the planar valve 10T of the water purifier 2 according to the first embodiment of the present application is in the standby working position, the planar valve 10T can prevent the raw water from flowing through the planar valve 10T, so that the planar valve 10T can control the raw water not to flow to the filtering device 20K while not providing the raw water or the purified water to the user.

[0314] As shown in FIG. 1, the planar valve 10T of the water purifier 2 according to the first embodiment of the present application further has a standby working position, wherein when the planar valve 10T is in the standby working position, the sixth passage 106T of the planar valve 10T only communicates with the raw water inlet passage 1012T, and the seventh passage 107T is blocked by the first fluid control surface 1210T of the fixed valve disc 121T. The sixth passage 106T of the planar valve 10T only communicates with the raw water inlet passage 1012T, which results in that the raw water can only flow to the sixth passage 106T through the raw water inlet 1106K, and the seventh passage 107T is blocked by the first fluid control surface 1210T of the fixed valve disc 121T, which further cuts off the water flow through the planar valve 10T. Further, when the planar valve 10T is in the standby working position, the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T and the eighth passage 108T of the fixed valve disc 121T are respectively blocked (or closed) by the movable valve disc 122T. That is, when the planar valve 10T of the water purifier 2 according to the first embodiment of the present application is in the standby working position, the planar valve 10T can prevent the raw water from flowing through the planar valve 10T, so that the planar valve 10T can control the raw water not to flow to the filtering device 20K while not providing the raw water or the purified water to the user. FIG. 27F and FIG. 27F As shown, the planar valve 10T of the water purifier 2 according to the first embodiment of the present application further has a standby working position, wherein when the planar valve 10T is in the standby working position, the sixth passage 106T of the planar valve 10T only communicates with the raw water inlet passage 1012T, and the seventh passage 107T is blocked by the first fluid control surface 1210T of the fixed valve disc 121T. The sixth passage 106T of the planar valve 10T only communicates with the raw water inlet passage 1012T, which results in that the raw water can only flow to the sixth passage 106T through the raw water inlet 1106K, and the seventh passage 107T is blocked by the first fluid control surface 1210T of the fixed valve disc 121T, which further cuts off the water flow through the planar valve 10T. Further, when the planar valve 10T is in the standby working position, the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T and the eighth passage 108T of the fixed valve disc 121T are respectively blocked (or closed) by the movable valve disc 122T. That is, when the planar valve 10T of the water purifier 2 according to the first embodiment of the present application is in the standby working position, the planar valve 10T can prevent the raw water from flowing through the planar valve 10T, so that the planar valve 10T can control the raw water not to flow to the filtering device 20K while not providing the raw water or the purified water to the user. FIGS. 24A-24FAs shown, when the planar valve 10T of the water purifier 2 according to the first embodiment of the present invention is in the backwashing working position, the first channel 101T, the second channel 102T, the third channel 103T, the fourth channel 104T, the fifth channel 105T and the eighth channel 108T of the planar valve 10T are respectively blocked (or closed) by the moving valve plate 122T.

[0315] As shown in the attached image. FIGS. 26A-27A and FIGS. 26A-26D As shown, in the water purifier 2 according to the first embodiment of the present invention, the fixed valve plate 121T of the planar valve 10T forms a central portion 12101T, an extension portion 12102T extending outward from the central portion 12101T, and an edge portion 12103T extending outward from the extension portion 12102T. The second channel 102T, the third channel 103T, the fourth channel 104T, the fifth channel 105T, the ninth channel 109T, and the eleventh channel 1011T extend from the edge portion 12103T of the first fluid control surface 1210T of the fixed valve plate 121T. The first channel 101T, the eighth channel 108T, and the tenth channel 1010T extend from the first fluid control surface 1210T of the fixed valve plate 121T. The extension portion 12102T extends, the raw water inlet channel 1012T extends from the center portion 12101T of the first fluid control surface 1210T of the fixed valve plate 121T, the second fluid control surface 1220T of the moving valve plate 122T of the planar valve 10T forms a central region 12201T, an extension region 12202T extending outward from the central region 12201T, and an edge region 12203T extending outward from the extension region 12202T, the sixth channel 106T extends from the central region 12201T and the extension region 12202T of the second fluid control surface 1220T of the moving valve plate 122T, and the seventh channel 107T extends from the edge region 12203T of the second fluid control surface 1220T of the moving valve plate 122T. Furthermore, when the second fluid control surface 1220T of the movable valve plate 122T is disposed on the first fluid control surface 1210T of the fixed valve plate 121T, the center portion 12101T of the first fluid control surface 1210T of the fixed valve plate 121T is aligned with the center region 12201T of the second fluid control surface, the extension portion 12102T of the first fluid control surface 1210T of the fixed valve plate 121T is aligned with the extension region 12202T of the second fluid control surface 1220T, and the edge portion 12103T of the first fluid control surface 1210T of the fixed valve plate 121T is aligned with the edge region 12203T of the second fluid control surface 1220T of the movable valve plate 122T. Preferably, the outer diameter of the movable valve plate 122T is the same as that of the fixed valve plate 121T.

[0316] As shown in the accompanying drawings FIG. 22A The first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T, the eighth passage 108T, the ninth passage 109T, the tenth passage 1010T and the eleventh passage 1011T of the planar valve 10T of the water purifier 2 according to the first embodiment of the present application are arranged separately on the first fluid control surface 1210T of the fixed valve plate 121T; the sixth passage 106T and the seventh passage 107T of the planar valve 10T are arranged separately on the second fluid control surface 1220T of the moving valve plate 122T.

[0317] As shown in the accompanying drawings FIGS. 23A-24F and FIG. 22A The fixed valve plate 121T of the valve core 12T of the planar valve 10T of the water purifier 2 according to the first embodiment of the present application comprises a high end portion 1211T, a low end portion 1212T and a fixed portion 1213T arranged between the high end portion 1211T and the low end portion 1212T, wherein the high end portion 1211T forms the first fluid control surface 1210T of the fixed valve plate 121T, and the low end portion 1212T is arranged in the valve cavity 110K of the valve body 11K. Preferably, the low end portion 1212T of the fixed valve plate 121T of the valve core 12T of the planar valve 10T of the water purifier 2 according to the present application is integrally arranged on the inner wall of the valve body 11K of the planar valve 10T.

[0318] As shown in the accompanying drawings FIGS. 23A-24F and FIG. 22AAs shown, the planar valve 10T of the water purifier 2 according to the first embodiment of the present application further comprises a sealing assembly 13T, wherein the sealing assembly 13T has a first sealing member 131T, wherein the first sealing member 131T is disposed between the high end portion 1211T and the fixed portion 1213T of the fixed valve plate 121T. Further, the first sealing member 131T has a plurality of first sealing strips 1311T, and the fixed portion 1213T of the fixed valve plate 121T has a set of first sealing grooves 12130T, wherein the first sealing grooves 12130T are disposed around the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T, the eighth passage 108T, the ninth passage 109T, the tenth passage 1010T, the eleventh passage 1011 and the raw water inlet passage 1012T of the fixed valve plate 121T respectively, and the first sealing strips 1311T of the first sealing member 131T are disposed in the first sealing grooves 12130T of the fixed portion 1213T, so that the first sealing strips 1311T of the first sealing member 131T can be engaged in the first sealing grooves 12130T of the fixed portion 1213T and achieve the sealing between the high end portion 1211T and the fixed portion 1213T of the fixed valve plate 121T. It can be understood that the first sealing grooves 12130T are formed on the side of the fixed portion 1213T towards the high end portion 1211T. Further, the sealing assembly 13T has a second sealing member 132T, wherein the second sealing member 132T is disposed between the fixed portion 1213T and the low end portion 1212T of the fixed valve plate 121T. Further, the second sealing member 132T has a plurality of second sealing strips 1321T, and the fixed portion 1213T of the fixed valve plate 121T has a set of second sealing grooves 12131T, wherein the second sealing grooves 12131T are disposed around the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T, the eighth passage 108T, the ninth passage 109T, the tenth passage 1010T, the eleventh passage 1011 and the raw water inlet passage 1012T of the fixed valve plate 121T respectively, and the second sealing strips 1321T of the second sealing member 132T are disposed in the second sealing grooves 12131T of the fixed portion 1213T, so that the second sealing strips 1321T of the second sealing member 132T can be engaged in the second sealing grooves 12131T of the fixed portion 1213T and achieve the sealing between the low end portion 1212T and the fixed portion 1213T of the fixed valve plate 121T. It can be understood that the second sealing grooves 12131T are formed on the side of the fixed portion 1213T towards the low end portion 1212T.

[0319] As shown in the drawings FIGS. 23A-24F andFIG. 22A As shown, in the first embodiment of the water purifier 2, the receiving chamber 410 of the fixing bracket 41 of the fixing device 40 is configured to accommodate the high end portion 1211T of the fixed valve plate 121T and the moving valve plate 122T therein. (See attached figures.) FIGS. 23A-24F and FIGS. 24A-27F As shown, further, the high end portion 1211T of the fixed valve plate 121T is adapted to be detachably snapped into the fixed portion 1213T of the fixed valve plate 121T, and the fixed portion 1213T of the fixed valve plate 121T is adapted to be detachably snapped into the low end portion 1212T of the fixed valve plate 121T, so that the high end portion 1211T of the fixed valve plate 121T cannot rotate relative to the fixed portion 1213T, and the fixed portion 1213T of the fixed valve plate 121T cannot rotate relative to the low end portion 1212T.

[0320] As shown in the attached image. FIGS. 26A-26DAs shown, the first fluid control surface 1210T of the stationary valve plate 121T of the planar valve 10T of the water purifier 2 according to the first embodiment of the present application has a center portion 12101T, an extension portion 12102T extending outwardly from the center portion 12101T, and an edge portion 12103T extending outwardly from the extension portion 12102T, wherein the center portion 12101T, the extension portion 12102T, and the edge portion 12103T are located at the top end portion 1214T of the stationary valve plate 121T, and the extension portion 12102T and the edge portion 12103T (or the portion outside the center portion 12101T) of the first fluid control surface 1210T are divided into a first portion 1201T, a second portion 1202T, a third portion 1203T, and a fourth portion 1204T as shown by the dot-dash line; the second fluid control surface 1220T of the movable valve plate 122T of the planar valve 10T has a center region 12201T, an extension region 12202T extending outwardly from the center region 12201T, and an edge region 12203T extending outwardly from the extension region 12202T, wherein the center region 12201T, the extension region 12202T, and the edge region 12203T are located at the bottom end portion 1221T of the movable valve plate 122T, and the extension region 12202T and the edge region 12203T (the portion outside the center region 12201T) of the second fluid control surface 1220T are divided into a first region 2001T, a second region 2002T, a third region 2003T, and a fourth region 2004T as shown by the dot-dash line;wherein the first passage 101T extends downward from the first portion 1201T of the first fluid control face 1210T of the fixed valve plate 121T, the second passage 102T extends downward from the first portion 1201T of the first fluid control face 1210T of the fixed valve plate 121T, the third passage 103T extends downward from the first portion 1201T of the first fluid control face 1210T of the fixed valve plate 121T, the fourth passage 104T extends downward from the third portion 1203T of the first fluid control face 1210T of the fixed valve plate 121T, the fifth passage 105T extends downward from the third portion 1203T of the first fluid control face 1210T of the fixed valve plate 121T, the sixth passage 106T extends upward from the central region 12201T and the first region 2001T of the second fluid control face 1220T of the moving valve plate 122T, the seventh passage 107T extends upward from the third region 2003T of the second fluid control face 1220T of the moving valve plate 122T, the eighth passage 108T extends downward from the third portion 1203T of the first fluid control face 1210T of the fixed valve plate 121T, the ninth passage 109T extends downward from the second portion 1202T of the first fluid control face 1210T of the fixed valve plate 121T, the tenth passage 1010T extends downward from the fourth portion 1204T of the first fluid control face 1210T of the fixed valve plate 121T, the eleventh passage 1011T extends downward from the second portion 1202T of the first fluid control face 1210T of the fixed valve plate 121T, and the raw water inlet passage 1012T extends downward from the central portion 12101T of the first fluid control face 1210T of the fixed valve plate 121T. As shown in the drawings; FIGS. 26A-27FAs shown, preferably, the extension 12102T and the edge 12103T of the first fluid control face 1210T of the stationary valve disc 121T are divided into the first portion 1201T, the second portion 1202T, the third portion 1203T and the fourth portion 1204T clockwise, the extension area 12202T and the edge area 12203T of the second fluid control face 1220T of the moving valve disc 122T of the flat valve 10T are divided into the first area 2001T, the second area 2002T, the third area 2003T and the fourth area 2004T clockwise. In other words, the first fluid control face 1210T of the stationary valve disc 121T of the flat valve 10T forms four equal parts, the second fluid control face 1220T of the moving valve disc 122T of the flat valve 10T forms four equal parts, wherein when the moving valve disc 122T of the flat valve 10T is rotated to the first equal part (the first area 2001T) of the second fluid control face 1220T of the moving valve disc 122T directly opposite the fourth equal part (the fourth portion 1204T) of the first fluid control face 1210T of the stationary valve disc 121T, the third equal part (the third area 2003T) of the second fluid control face 1220T of the moving valve disc 122T of the flat valve 10T is directly opposite the second equal part (the second portion 1202T) of the first fluid control face 1210T of the stationary valve disc 121T, so that the sixth channel 106T of the flat valve 10T is connected with the raw water inlet channel 1012T and the tenth channel 1010T respectively, the seventh channel 107T is connected with the ninth channel 109T and the eleventh channel 1011T respectively, to allow raw water to flow from the raw water inlet 1106K, the raw water inlet channel 1012T, the sixth channel 106T, the tenth channel 1010T, the second opening 1102K, the second communication opening 202K into the filter device 20K, and after the primary filter element 22K of the filter device 20K is back-flushed (referring to the flow direction of water in the primary filter element 22K during back-flushing being opposite to that during filtering), the water flows out through the first communication opening 201K of the filter device 20K, and then flows out through the first opening 1101K, the eleventh channel 1011T, the seventh channel 107T, the ninth channel 109T and the sewage outlet 1109K, accordingly, at this time, the water purifier 2 is in the back-flushing working state.Further, when the moving valve disc 122T of the flat valve 10T is rotated to the first equal part (the first area 2001T) of the second fluid control surface 1220T of the moving valve disc 122T directly opposite the third equal part (the third part 1203T) of the first fluid control surface 1210T of the fixed valve disc 121T, the third equal part (the third area 2003T) of the second fluid control surface 1220T of the moving valve disc 122T of the flat valve 10T is directly opposite the first equal part (the first part 1201T) of the first fluid control surface 1210T of the fixed valve disc 121T, so that the sixth channel 106T of the flat valve 10T is communicated with the raw water inlet channel 1012T and the eighth channel 108T respectively, the seventh channel 107T is communicated with the second channel 102T and the third channel 103T respectively, to allow raw water to flow from the raw water inlet 1106K, the raw water inlet channel 1012T, the sixth channel 106T, the eighth channel 108T, the first opening 1101K, the first communication opening 201K into the filter device 20K, and after the raw water is filtered by the primary filter element 22K of the filter device 20K, flows out through the clean water channel 2201K of the primary filter element 22K and the second communication opening 202K, and then flows out through the second opening 1102K, the second channel 102T, the seventh channel 107T, the third channel 103T and the third opening 1103K and is provided, accordingly, at this time, the water purifier 2 is in the second purification working state. Further, when the moving valve disc 122T of the flat valve 10T is rotated to the first equal part (the first area 2001T) of the second fluid control surface 1220T of the moving valve disc 122T directly opposite the second equal part (the second part 1202T) of the first fluid control surface 1210T of the fixed valve disc 121T, the third equal part (the third area 2003T) of the second fluid control surface 1220T of the moving valve disc 122T of the flat valve 10T is directly opposite the fourth equal part (the fourth part 1204T) of the first fluid control surface 1210T of the fixed valve disc 121T, so that the sixth channel 106T of the flat valve 10T is communicated with the raw water inlet channel 1012T only, the seventh channel 107T is blocked by the first fluid control surface 1210T of the fixed valve disc 121T, the first channel 101T, the second channel 102T, the third channel 103T, the fourth channel 104T, the fifth channel 105T, the eighth channel 108T, the ninth channel 109T, the tenth channel 1010T and the eleventh channel 1011T of the fixed valve disc 121T are blocked by the moving valve disc 122T respectively, the flat valve 10T controls raw water not to flow to the filter device 20K and also not to provide raw water or purified water to the user, accordingly, at this time, the water purifier 2 is in the standby working state.When the movable valve plate 122T of the flat valve 10T is rotated to the first fluid control surface 1220T of the movable valve plate 122T, the third section (the third area 2003T) of the second fluid control surface 1220T of the movable valve plate 122T of the flat valve 10T is opposite to the third section (the third section 1203T) of the first fluid control surface 1210T of the fixed valve plate 121T, so that the sixth channel 106T of the flat valve 10T is communicated with the raw water inlet channel 1012T and the first channel 101T respectively, the seventh channel 107T is communicated with the fourth channel 104T and the fifth channel 105T respectively, to allow raw water to flow from the raw water inlet 1106K, the raw water inlet channel 1012T, the sixth channel 106T, the first channel 101T, the first opening 1101K, the first communication opening 201K into the filter device 20K, and the raw water filtered by the primary filter element 22K of the filter device 20K flows into the purified water channel 2201K of the filter device 20K, the purified water filtered by the primary filter element 22K further flows through the secondary filter element 23K to generate secondary purified water, and the secondary purified water flows out of the third communication opening 203K through the purified water outlet 2301K, and then flows out and is provided through the fourth opening 1104K, the fourth channel 104T, the seventh channel 107T, the fifth channel 105T and the fifth opening 1105K. Correspondingly, at this time, the purified water device 2 is in the first purification working state.

[0321] As shown in the drawings FIGS. 26A-27FAs shown, preferably, the fourth channel 104T and the fifth channel 105T extend along the first fluid control surface 1210T, and the fourth channel 104T and the fifth channel 105T extend in the same direction, and the sixth channel 106T and the seventh channel 107T correspond to each other, so that the flat valve 10T is switched from the standby working position to the first purification working position, when the moving valve disc 122T of the flat valve 10T is rotated to the sixth channel 106T coincides with the raw water inlet channel 1012T and the first channel 101T, the seventh channel 107T coincides with the fourth channel 104T and the fifth channel 105T at the same time; and the flat valve 10T is switched from the standby working position to the second purification working position, when the moving valve disc 122T of the flat valve 10T is rotated to the sixth channel 106T coincides with the raw water inlet channel 1012T and the eighth channel 108T, the seventh channel 107T coincides with the second channel 102T and the third channel 103T at the same time. Accordingly, when the flat valve 10T is switched from the standby working position to the first purification working position (or switched from the first purification working position to the standby working position), the user can control the flow rate of the raw water flowing to the filter device 20K by adjusting the coincidence degree of the sixth channel 106T and the first channel 101T. Further, the second channel 102T and the third channel 103T extend along the first fluid control surface 1210T, and the second channel 102T and the third channel 103T extend in the same direction, so that when the flat valve 10T is switched from the standby working position to the second purification working position (or switched from the second purification working position to the standby working position), the user can control the flow rate of the raw water flowing to the filter device 20K by adjusting the coincidence degree of the sixth channel 106T and the eighth channel 108T. Accordingly, the fourth channel 104T and the fifth channel 105T correspond to each other, and the second channel 102T and the third channel 103T correspond to each other. It can be understood that when the user adjusts the coincidence degree of the sixth channel 106T and the first channel 101T, the coincidence degree of the seventh channel 107T and the fourth channel 104T (and the fifth channel 105T) is also adjusted accordingly; when the user adjusts the coincidence degree of the sixth channel 106T and the eighth channel 108T, the coincidence degree of the seventh channel 107T and the second channel 102T (and the third channel 103T) is also adjusted accordingly. Therefore, the user can adjust the water inlet and water outlet of the water purifier 2 of the first embodiment of the present application, so as to realize stepless flow control of the water purifier 2 of the first embodiment of the present application.In other words, when the flat valve 10T switches from the standby working position to the first purifying working position or from the standby working position to the second purifying working position, the degree of coincidence of the passages (the sixth passage 106T and the seventh passage 107T) of the moving valve disc 122T and the passages (the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T and the eighth passage 108T) of the fixed valve disc 121T can be adjusted by rotating the moving valve disc 122T around the center of the moving valve disc 122T, so as to realize stepless flow control of the water inlet and outlet of the water purifier 2. Preferably, the second passage 102T and the third passage 103T are both located outside the first passage 101T, the fourth passage 104T and the fifth passage 105T are both located outside the eighth passage 108T, and the second passage 102T is located inside the third passage 103T, and the fourth passage 104T is located inside the fifth passage 105T. Alternatively, the second passage 102T and the third passage 103T are both located outside the first passage 101T, the fourth passage 104T and the fifth passage 105T are both located outside the eighth passage 108T, and the third passage 103T is located inside the second passage 102T, and the fifth passage 105T is located inside the fourth passage 104T. Preferably, the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T and the eighth passage 108T are all arc-shaped, and the sixth passage 106T (part of the extension area 12202T) and the seventh passage 107T are both arc-shaped. More preferably, the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T and the eighth passage 108T all extend around the center of the first fluid control surface 1210T of the fixed valve disc 121T of the flat valve 10T, and the sixth passage 106T (part of the extension area 12202T) and the seventh passage 107T both extend around the center of the second fluid control surface 1220T of the moving valve disc 122T.More preferably, the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T and the eighth passage 108T all extend arcuately around the center portion 12101T of the first fluid control face 1210T of the fixed valve plate 121T of the planar valve 10T, the sixth passage 106T (at the portion of the extended area 12202T) and the seventh passage 107T extend arcuately around the center area 12201T of the second fluid control face 1220T of the moving valve plate 122T, and the fourth passage 104T and the fifth passage 105T correspond to the same central angle, and the second passage 102T and the third passage 103T correspond to the same central angle, to facilitate the stepless control of the water flow by the planar valve 10T. Optionally, the first fluid control face 1210T is circular, and the second passage 102T, the third passage 103T, the fourth passage 104T and the fifth passage 105T extend along the tangents of the first fluid control face 1210T. More preferably, the sixth passage 106T and the seventh passage 107T are disposed at two opposite positions of the moving valve plate 122T. More preferably, the sixth passage 106T (at the portion of the extended area 12202T) corresponds to a central angle of the same size as that of the first passage 101T, the seventh passage 107T corresponds to a central angle of the same size as that of the fourth passage 104T, and / or the sixth passage 106T (at the portion of the extended area 12202T) corresponds to a central angle of the same size as that of the eighth passage 108T, and the seventh passage 107T corresponds to a central angle of the same size as that of the second passage 102T, to facilitate the stepless control of the water flow by the planar valve 10T. Most preferably, the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T, the sixth passage 106T (at the portion of the extended area 12202T), the seventh passage 107T and the eighth passage 108T correspond to central angles of the same size.

[0322] It can be understood that the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T and the eighth passage 108T of the planar valve 10T of the water purifier 2 according to the first embodiment of the present application are distributed on the first fluid control surface 1210T of the fixed valve plate 121T of the planar valve 10T, so that when the moving valve plate 122T of the planar valve 10T of the water purifier 2 rotates relative to the fixed valve plate 121T to switch the planar valve 10T from the standby working position to the first purification working position (or from the first purification working position to the standby working position), or from the standby working position to the second purification working position (or from the second purification working position to the standby working position), the moving valve plate 122T of the planar valve 10T can rotate relative to the fixed valve plate 121T to realize stable conduction of the flow passage even if the working position switching is not completely switched (or in the switching process). The main reason is that when the planar valve 10T is switched from the standby working position to the first purification working position or from the first purification working position to the standby working position, the sixth passage 106T of the planar valve 10T is always stably communicated with the raw water inlet passage 1012T and the first passage 101T, respectively, and the seventh passage 107T of the planar valve 10T is always stably communicated with the fourth passage 104T and the fifth passage 105T, respectively; when the planar valve 10T is switched from the standby working position to the second purification working position or from the second purification working position to the standby working position, the sixth passage 106T of the planar valve 10T is always stably communicated with the raw water inlet passage 1012T and the eighth passage 108T, respectively, and the seventh passage 107T of the planar valve 10T is always stably communicated with the second passage 102T and the third passage 103T, respectively. The sixth passage 106T of the planar valve 10T is always stably communicated with the raw water inlet passage 1012T and the first passage 101T, respectively, and the seventh passage 107T of the planar valve 10T is always stably communicated with the fourth passage 104T and the fifth passage 105T, respectively, and the sixth passage 106T of the planar valve 10T is always stably communicated with the raw water inlet passage 1012T and the eighth passage 108T, respectively, and the seventh passage 107T of the planar valve 10T is always stably communicated with the second passage 102T and the third passage 103T, respectively, which ensures that there is no cross flow when the planar valve 10T is switched from the standby working position to the first purification working position or from the first purification working position to the standby working position, and from the standby working position to the second purification working position or from the second purification working position to the standby working position, thereby ensuring stepless control of the flow of water flowing through the control valve 10T during the working position switching process.

[0323] As shown in the accompanying drawings FIGS. 24A-24FAs shown, notably, when the user needs to switch the water purifier 2 from the backwashing working state to the second purifying working state, the user only needs to rotate the moving valve disc 122T of the flat valve 10T counterclockwise by one equal angle, so that the first area 2001T of the second fluid control face 1220T of the moving valve disc 122T is opposite to the third part 1203T of the first fluid control face 1210T of the fixed valve disc 121T; when the user needs to switch the water purifier 2 from the second purifying working state to the standby working state, the user only needs to rotate the moving valve disc 122T of the flat valve 10T counterclockwise by one equal angle again, so that the first area 2001T of the second fluid control face 1220T of the moving valve disc 122T is opposite to the second part 1202T of the first fluid control face 1210T of the fixed valve disc 121T; when the user needs to switch the water purifier 2 from the standby working state to the first purifying working state, the user only needs to rotate the moving valve disc 122T of the flat valve 10T counterclockwise by one equal angle again, so that the first area 2001T of the second fluid control face 1220T of the moving valve disc 122T is opposite to the first part 1201T of the first fluid control face 1210T of the fixed valve disc 121T. In other words, the structure of the flat valve 10T of the water purifier 2 makes the backwashing working state, the second purifying working state, the standby working state and the first purifying working state of the water purifier 2 continuously distributed, so that the switching between the adjacent working states of the backwashing working state, the second purifying working state, the standby working state and the first purifying working state of the water purifier 2 can be realized by rotating the moving valve disc 122T of the flat valve 10T by one equal angle. The switching mode between the four working states of the water purifier 2 determined by the structure of the flat valve 10T of the water purifier 2 makes the switching between the four working states of the water purifier 2 more in line with the use habits of the user and less likely to cause the user to switch the working state due to different rotation angles. It can be understood that, since the extension part 12102T and the edge part 12103T of the first fluid control face 1210T of the flat valve 10T of the water purifier 2 are quartered, the extension area 12202T and the edge area 12203T of the second fluid control face 1220T of the moving valve disc 122T of the flat valve 10T are quartered, accordingly, the water purifier 2, the moving valve disc 122T of the flat valve 10T is rotated by 90 degrees for each working state switching. In other words, one equal angle of the moving valve disc 122T and the fixed valve disc 121T of the flat valve 10T is 90 degrees.Optionally, the extension part 12102T and the edge part 12103T of the first fluid control face 1210T are counter-clockwise bisected into the first part 1201T, the second part 1202T, the third part 1203T and the fourth part 1204T, the extension area 12202T and the edge area 12203T of the second fluid control face 1220T of the moving valve disc 122T of the flat valve 10T are counter-clockwise bisected into the first area 2001T, the second area 2002T, the third area 2003T and the fourth area 2004T. At this time, the structure of the flat valve 10T of the water purifier 2 of the present application is such that the four working states of the first purification working state, the standby working state, the second purification working state and the backwashing working state of the water purifier 2 are continuously distributed, so that the switching between the adjacent working states of the first purification working state, the standby working state, the second purification working state and the backwashing working state of the water purifier 2 of the present application can be realized by rotating the moving valve disc 122T of the flat valve 10T by one bisected angle. In addition, as mentioned above, when switching the water purifier 2 of the first embodiment of the present application from the standby working state to the first purification working state (or the second purification working state), the stepless control of the flow rate of the water inlet and outlet of the water purifier 2 of the present application can be realized by adjusting the degree of coincidence of the passages (the sixth passage 106T and the seventh passage 107T) of the moving valve disc 122T and the passages (the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T and the eighth passage 108T) of the fixed valve disc 121T. However, when the water purifier 2 of the present application switches from the standby working state to the first purification working state (or the second purification working state), the state switching can also be realized by rotating the moving valve disc 122T by one bisected angle, so that the sixth passage 106T (part in the extension area 12202T) of the moving valve disc 122T is directly opposite the first passage 101T (or the eighth passage 108T) of the fixed valve disc 121, and the seventh passage 107T is directly opposite the fourth passage 104T and the fifth passage 105T (or the second passage 102T and the third passage 103T). At this time, the flow rate of the water inlet and outlet of the water purifier 2 of the present application is the largest. It can be understood that the water purifier 2 can also be quickly switched from the first purification working state to the standby working state (or from the second purification working state to the standby working state) by rotating by one bisected angle, and the water purifier 2 can also be quickly switched from the standby working state to the first purification working state (or from the standby working state to the second purification working state) by rotating by one bisected angle.

[0324] As shown in the drawings FIGS. 26A-27F and FIGS. 28-44EAs shown, according to the first embodiment of the present application, the present application further provides a valve disc assembly for a flat valve of a water purifier, which comprises a fixed valve disc 121T and a movable valve disc 122T, wherein the fixed valve disc 121T has a first fluid control surface 1210T, the movable valve disc 122T has a second fluid control surface 1220T, the movable valve disc 122T and the fixed valve disc 121T are arranged in the valve cavity 110K, the second fluid control surface 1220T of the movable valve disc 122T is arranged on the first fluid control surface 1210T of the fixed valve disc 121T, and the movable valve disc 122T is arranged to be rotatable relative to the fixed valve disc 121T, the flat valve 10T has a first passage 101T, a second passage 102T, a third passage 103T, a fourth passage 104T, a fifth passage 105T, a sixth passage 106T, a seventh passage 107T, and a raw water inlet passage 1012T, the first passage 101T, the second passage 102T, the third passage 103T, the fourth passage 104T, the fifth passage 105T, and the raw water inlet passage 1012T are arranged on the fixed valve disc 121T and extend from the first fluid control surface 1210T of the fixed valve disc 121T, respectively, the sixth passage 106T and the seventh passage 107T are arranged on the movable valve disc 122T and extend from the second fluid control surface 1220T of the movable valve disc 122T, respectively, the first passage 101T is in communication with the first opening 1101K, the second passage 102T is in communication with the second opening 1102K, the third passage 103T is in communication with the third opening 1103K, the fourth passage 104T is in communication with the fourth opening 1104K, the fifth passage 105T is in communication with the fifth opening 1105K, the sixth passage 106T is in communication with the raw water inlet passage 1012T, and the raw water inlet passage 1012T is in communication with the raw water inlet 1106K. More preferably, the sixth passage 106T and the seventh passage 107T of the movable valve disc 122T are through blind holes. The flat valve 10T further has an eighth passage 108T, which is arranged on the fixed valve disc 121T and extends from the first fluid control surface 1210T of the fixed valve disc 121T, and the eighth passage 108T is in communication with the first opening 1101K. The flat valve 10T further has a ninth passage 109T, a tenth passage 1010T, and an eleventh passage 1011T, which are arranged on the fixed valve disc 121T and extend from the first fluid control surface 1210T of the fixed valve disc 121T, respectively, the ninth passage 109T is in communication with the blowdown opening 1109K, the tenth passage 1010T is in communication with the second opening 1102K, and the eleventh passage 1011T is in communication with the first opening 1101K.

[0325] Referring to the drawings of the specification FIGS. 28-40C , a water purifier 2 according to a second embodiment of the present application is illustrated, wherein the water purifier 2 of the present application comprises a control valve 10 and a filtering device 20, wherein the control valve 10 is arranged for controlling the flow of water, such as controlling the supply of raw water (or tap water) to the filtering device 20 and controlling the supply of purified water generated or produced by the filtering device 20.

[0326] As shown in the drawings of the specification FIGS. 28-40C , the filtering device 20 of the water purifier 2 according to the second embodiment of the present application comprises a housing 21, a primary filter element 22 and a secondary filter element 23, wherein the housing 21 forms a first accommodating cavity 210, the primary filter element 22 forms a second accommodating cavity 220, wherein the primary filter element 22 is arranged in the first accommodating cavity 210 of the housing 21, the secondary filter element 23 is arranged in the second accommodating cavity 220 of the primary filter element 22, and the housing 21 and the primary filter element 22 form a raw water passage 2101 therebetween, the primary filter element 22 and the secondary filter element 23 form a purified water passage 2201 therebetween (the purified water passage 2201 can be regarded as a part of the second accommodating cavity 220), and the secondary filter element 23 has a purified water outlet 2301. Accordingly, since the secondary filter element 23 is arranged in the second accommodating cavity 220 of the primary filter element 22, when raw water flows from the raw water passage 2101 under the action of water pressure, after being treated by the primary filter element 22, the purified water generated by the primary filter element 22 can flow to the secondary filter element 23 under the action of water pressure and be treated by the secondary filter element 23 to obtain secondary purified water, and the secondary purified water flows out from the purified water outlet 2301 under the action of water pressure to be supplied. Preferably, the primary filter element 22 is a ceramic filter element, and the secondary filter element 23 is an external pressure type ultrafiltration filter element, wherein the ultrafiltration membrane filaments 231 of the secondary filter element 23 are arranged in the second accommodating cavity 220 of the primary filter element 22, so that the purified water passage 2201 is formed between the ultrafiltration membrane filaments 231 of the secondary filter element 23 and the primary filter element 22. Therefore, the purified water generated by the primary filter element 22 can be further treated by the secondary filter element 23 under the action of water pressure, so as to obtain more purified water (or ultrafiltration filtered water). It can be understood that the primary filter element can also be a filter element made of other materials, or a composite filter element made of multiple materials, such as a composite filter element composed of any two or more than two materials of ceramic, carbon fiber, PP cotton and activated carbon particles.

[0327] As shown in the drawings of the specification FIGS. 28-40CAs shown, the filter device 20 of the water purifier 2 according to the second embodiment of the present application has a first communication opening 201, a second communication opening 202 and a third communication opening 203, wherein the first communication opening 201 of the filter device 20 is communicated with the raw water channel 2101 of the filter device 20, so that the control valve 10 can provide raw water to the filter device 20 through the first communication opening 201, the second communication opening 202 of the filter device 20 is communicated with the purified water channel 2201, so that the purified water produced by the first-stage filter element 22 from the treatment of raw water can flow to a second water outlet 200 of the water purifier 2 under the control of the control valve 10 and be provided to the user, and the third communication opening 203 of the filter device 20 is communicated with the purified water outlet 2301 of the second-stage filter element 23, so that the purified water produced by the second-stage filter element 23 can flow out through the third communication opening 203 and be provided to the user through a first water outlet 100 of the water purifier 2 under the control of the control valve 10. Preferably, the second-stage filter element 23 of the filter device 20 of the water purifier 2 is an external pressure type ultrafiltration filter element. Correspondingly, each ultrafiltration membrane wire 231 of the second-stage filter element 23 forms a membrane wire channel 2310, and the membrane wire channels 2310 of the ultrafiltration membrane wires 231 are all communicated with the purified water outlet 2301 of the second-stage filter element 23, so that the purified water produced by each ultrafiltration membrane wire 231 of the second-stage filter element 23 can flow to the third communication opening 203 of the filter device 20 under the action of water pressure.

[0328] As shown in the accompanying drawings FIGS. 28-40CAs shown, when the filter device 20 of the water purifier 2 according to the second embodiment of the present invention is used to treat raw water, the user can control the raw water to flow to the first connecting opening 201 of the filter device 20 through the control valve 10. Under the action of water pressure, the raw water flows to the raw water channel 2101 of the filter device 20. Under the action of water pressure, the raw water is treated by the first-stage filter element 22, and the purified water generated flows to the purified water channel 2201. At this time, if the purified water in the purified water channel 2201 can flow freely through the second connecting opening 202 of the filter device 20 under the control of the control valve 10, and the purified water generated by the second-stage filter element 23 cannot flow freely to the third connecting opening 203, then the purified water generated by the first-stage filter element 22 will flow out from the second connecting opening 202 and be provided under the action of water pressure. Accordingly, the water purifier 2 according to the second embodiment of the present invention is in a filtration working state at this time. On the other hand, if the purified water in the water purification channel 2201 cannot flow freely through the second connecting opening 202 of the filter device 20 under the control of the control valve 10, but the purified water produced by the secondary filter element 23 can flow freely to the third connecting opening 203, then the purified water produced by the primary filter element 22 will be further purified by the secondary filter element 23 under water pressure, and the purified water produced by the secondary filter element 23 will flow out from the third connecting opening 203 and be supplied. Accordingly, at this time, the water purifier 2 according to the second embodiment of the present invention is in an ultrafiltration working state. As shown in the attached figures... FIGS. 28-40C As shown, the water purifier 2 according to the second embodiment of the present invention further has a raw water supply working state, wherein when the water purifier 2 of the present invention is in the raw water supply working state, the user can control the raw water to flow directly to a raw water outlet through the control valve 10 so as to be supplied, without passing through the filter device 20 and being purified by it.

[0329] Noteably, when the secondary filter element 23 of the filter device 20 of the water purifier 2 of the present application is an outer pressure type ultrafiltration filter element, and the purified water produced by the primary filter element 22 can flow out of the second communication opening 202 of the filter device 20 freely, when the purified water produced by the primary filter element 22 flows out of the second communication opening 202 of the filter device 20, the purified water produced by the primary filter element 22 will flow through the ultrafiltration membrane filaments 231 of the secondary filter element 23, so that the ultrafiltration membrane filaments 231 of the secondary filter element 23 are washed by the purified water produced by the primary filter element 22. In other words, at this time, the filter device 20 of the water purifier 2 of the present application allows the purified water produced by the primary filter element 22 to be provided while further using the purified water produced by the primary filter element 22 to clean the ultrafiltration membrane filaments 231 of the secondary filter element 23. As known by those skilled in the art, a faucet water purifier directly installed on a tap water faucet is small in size due to the limitation of the space where it is used. When the faucet water purifier uses an ultrafiltration filter element, especially an ultrafiltration filter element with ultrafiltration membrane filaments as the main filter element, the ultrafiltration filter element is easy to smell and cannot be used continuously because of the aggregation of impurities such as microorganisms on the surface of the ultrafiltration membrane filaments of the ultrafiltration filter element. The filter device 20 of the water purifier 2 of the present application allows the purified water produced by the primary filter element 22 to be provided while further using the purified water produced by the primary filter element 22 to clean the surface of the ultrafiltration membrane filaments 231 of the secondary filter element 23, thereby preventing the aggregation of impurities such as microorganisms in tap water on the secondary filter element 23 and preventing the secondary filter element 23 from smelling and being unable to be used continuously. In other words, the water purifier 2 of the present application solves the problem of the aggregation of impurities that cannot be discharged in time and causes odor when a conventional faucet water purifier uses an ultrafiltration filter element (or ultrafiltration membrane filaments) to filter water through the ingenious structural design of the filter device 20 thereof, so that the ultrafiltration membrane filaments 231 of the secondary filter element 23 have better filtering effect and prolong the service life of the secondary filter element 23. More importantly, since the faucet water purifier is small in size, when a conventional faucet water purifier uses an ultrafiltration filter element to treat raw water such as tap water, it will be blocked in a short time. The flushing effect of the ultrafiltration membrane filaments 231 of the secondary filter element 23 by the purified water produced by the primary filter element 22 of the water purifier 2 of the present application significantly improves the problem of the aggregation of impurities that cannot be discharged in time when a conventional faucet water purifier uses an ultrafiltration filter element (or ultrafiltration membrane filaments) to filter water, so that it is possible for a faucet water purifier to use an ultrafiltration filter element to filter and treat water. The greater significance of the water purifier 2 of the present application is that it can enable consumers to get rid of conventional table-type water purifiers which are large in size and expensive. In addition, since the primary filter element 22 of the water purifier 2 of the present application is preferably a ceramic filter element, the purified water filtered thereby, although not suitable for direct drinking, has undergone preliminary filtering and purifying treatment of raw water and can be used for washing vegetables, washing and the like.

[0330] As shown in the drawings FIGS. 28-40CAs shown, the filter device 20 of the water purifier 2 according to the second embodiment of the present application further comprises a base 24, wherein the secondary filter element 23 is disposed in the base 24, and the base 24 forms a first water cavity 2401, wherein the first water cavity 2401 of the base 24 is respectively communicated with the third communication opening 203 of the filter device 20 and the purified water outlet 2301 of the secondary filter element 23. In other words, the membrane channel 2310 of the ultrafiltration membrane wire 231 of the secondary filter element 23 is communicated with the first water cavity 2401 of the base 24 and the third communication opening 203 of the filter device 20 through the purified water outlet 2301 of the secondary filter element 23, so that the secondary purified water generated by the secondary filter element 23 can flow out from the third communication opening 203. Preferably, the third communication opening 203 is disposed in the base 24. More preferably, the secondary filter element 23 is disposed in the base 24 in a water-tight manner, and the first water cavity 2401 is formed between the secondary filter element 23 and the base 24.

[0331] As shown in FIG. 2, the filter device 20 of the water purifier 2 according to the first embodiment of the present application comprises a primary filter element 22 and a secondary filter element 23, wherein the primary filter element 22 is disposed in the filter device 20, and the secondary filter element 23 is disposed in the filter device 20. FIGS. 28-40C As shown, the primary filter element 22 of the filter device 20 of the water purifier 2 according to the second embodiment of the present application is disposed in the base 24, and the base 24 further forms a second water cavity 2402, wherein the second water cavity 2402 of the base 24 is respectively communicated with the second communication opening 202 of the filter device 20 and the purified water channel 2201. In other words, the purified water channel 2201 of the filter device 20 is communicated with the second communication opening 202 of the filter device 20 through the second water cavity 2402 of the base 24, so that the purified water generated by the primary filter element 22 can flow out from the second communication opening 202. Preferably, the second communication opening 202 is disposed in the base 24.

[0332] As shown in FIG. 2, the filter device 20 of the water purifier 2 according to the first embodiment of the present application comprises a primary filter element 22 and a secondary filter element 23, wherein the primary filter element 22 is disposed in the filter device 20, and the secondary filter element 23 is disposed in the filter device 20. FIGS. 28-40C As shown, the primary filter element 22 of the filter device 20 of the water purifier 2 according to the second embodiment of the present application is disposed in the base 24 in a water-tight manner, so as to prevent the raw water in the raw water channel 2101 from flowing into the purified water channel 2201. Further, the primary filter element 22 is detachably disposed in the base 24, so that the primary filter element 22 can be replaced. Alternatively, the primary filter element 22 is disposed in the housing 21 in a water-tight manner, so that the raw water can only flow in the raw water channel 2101. Alternatively, the primary filter element 22 is detachably disposed in the housing 21. Alternatively, the primary filter element 22 is integrally disposed in the base 24. Alternatively, the primary filter element 22 is integrally disposed in the housing 21.

[0333] As shown in FIG. 2, the filter device 20 of the water purifier 2 according to the first embodiment of the present application comprises a primary filter element 22 and a secondary filter element 23, wherein the primary filter element 22 is disposed in the filter device 20, and the secondary filter element 23 is disposed in the filter device 20. FIGS. 28-40CAs shown, according to the second embodiment of the present invention, the secondary filter element 23 of the filtration device 20 of the water purifier 2 further includes a housing 232, wherein the ultrafiltration membrane fiber 231 of the secondary filter element 23 is disposed within the housing 232, and the housing 232 has at least one inlet 2320, wherein the inlet 2320 of the housing 232 communicates with the inner and outer spaces of the housing 232, so that when the water purifier 2 of the present invention is in the ultrafiltration working state, the purified water produced by the primary filter element 22 can flow to the ultrafiltration membrane fiber 231 through the inlet 2320 of the housing 232 under the action of water pressure. Therefore, the inlet 2320 of the housing 232 of the secondary filter element 23 can be regarded as part of the water purification channel 2201 of the filtration device 20.

[0334] As shown in the attached image. FIGS. 28-40C As shown, according to the second embodiment of the present invention, the base 24 of the filtration device 20 of the water purifier 2 i...

Claims

1. A water purifier characterized by comprising: Comprising: a control valve for controlling the flow of water; and a filter device for purifying raw water, wherein the filter device comprises a housing, a primary filter element and a secondary filter element, wherein the housing forms a first receiving cavity, wherein the primary filter element and the secondary filter element are both disposed in the first receiving cavity of the housing, and the housing and the primary filter element form a raw water passage therebetween, the primary filter element and the secondary filter element form a purified water passage therebetween, and the secondary filter element has a purified water outlet, wherein the filter device has a first communication opening, a second communication opening and a third communication opening, the control valve comprises a valve body and a valve core, wherein the valve body forms a valve cavity, a first opening, a second opening, a third opening, a fourth opening, a fifth opening, a raw water inlet and a blowdown opening, wherein the first communication opening of the filter device is in communication with the raw water passage of the filter device, the second communication opening of the filter device is in communication with the purified water passage of the filter device, the third communication opening of the filter device is in communication with the purified water outlet of the secondary filter element, and the valve core is disposed in the valve cavity, wherein the first opening of the valve body is adapted to be in communication with the first communication opening of the filter device, the second opening of the valve body is adapted to be in communication with the second communication opening of the filter device, the fourth opening of the valve body is adapted to be in communication with the third communication opening of the filter device, and the raw water inlet of the valve body is adapted to be in communication with a raw water source, wherein the control valve is a flat valve, wherein the valve core further comprises a stationary valve disc and a movable valve disc, wherein the stationary valve disc has a first fluid control surface, the movable valve disc has a second fluid control surface, wherein the movable valve disc and the stationary valve disc are both disposed in the valve cavity, the second fluid control surface of the movable valve disc is disposed on the first fluid control surface of the stationary valve disc, and the movable valve disc is disposed to be rotatable relative to the stationary valve disc, and the flat valve has a first passage, a second passage, a third passage, a fourth passage, a fifth passage, a sixth passage and a seventh passage, wherein the first passage, the second passage, the third passage, the fourth passage and the fifth passage are respectively provided in the stationary valve disc and respectively extend from the first fluid control surface of the stationary valve disc; ​ The sixth passage and the seventh passage are respectively provided in the moving valve plate and respectively extend from the second fluid control surface of the moving valve plate, wherein the first passage is communicated with the first opening, the second passage is communicated with the second opening, the third passage is communicated with the third opening, the fourth passage is communicated with the fourth opening, the fifth passage is communicated with the fifth opening, and the sixth passage is communicated with the raw water inlet, wherein when the flat valve is in a first purification working position, the sixth passage of the flat valve is communicated with the first passage, thereby forming a first communication passage communicated with the raw water inlet and the first opening respectively, and the seventh passage is respectively communicated with the fourth passage and the fifth passage, thereby forming a second communication passage communicated with the fourth opening and the fifth opening respectively.

2. The water purifier according to claim 1, wherein The flat valve further has an eighth passage, wherein the eighth passage is provided in the fixed valve plate and extends from the first fluid control surface of the fixed valve plate, the eighth passage is communicated with the first opening, when the flat valve is in a second purification working position, the sixth passage of the flat valve is communicated with the eighth passage, thereby forming a third communication passage communicated with the raw water inlet and the first opening respectively, and the seventh passage is respectively communicated with the second passage and the third passage, thereby forming a fourth communication passage communicated with the second opening and the third opening respectively.

3. The water purifier according to claim 2, wherein The flat valve further has a ninth passage, a tenth passage and an eleventh passage, wherein the ninth passage, the tenth passage and the eleventh passage are respectively provided in the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate, wherein the ninth passage is communicated with the blowdown opening, the tenth passage is communicated with the second opening, and the eleventh passage is communicated with the first opening, when the flat valve is in a backwashing working position, the sixth passage of the flat valve is communicated with the tenth passage, thereby forming a fifth communication passage communicated with the raw water inlet and the second opening respectively, and the seventh passage is respectively communicated with the ninth passage and the eleventh passage, thereby forming a sixth communication passage communicated with the first opening and the blowdown opening respectively.

4. The water purifier according to claim 1, wherein When the flat valve is in a standby working position, the sixth passage of the flat valve is blocked by the first fluid control surface of the fixed valve plate.

5. The water purifier according to claim 3, wherein When the flat valve is in a standby working position, the sixth passage of the flat valve is blocked by the first fluid control surface of the fixed valve plate.

6. The water purifier according to claim 1, wherein When the flat valve is in the first purification working position, the second passage and the third passage of the flat valve are respectively blocked by the moving valve plate.

7. The water purifier according to claim 5, wherein When the flat valve is in the first purification working position, the second passage and the third passage of the flat valve are respectively blocked by the moving valve plate.

8. The water purifier according to claim 2, wherein When the flat valve is in the second purification working position, the first passage, the fourth passage and the fifth passage of the flat valve are respectively blocked by the moving valve plate.

9. The water purifier according to claim 3, wherein When the flat valve is in the backwashing working position, the first passage, the second passage, the third passage, the fourth passage, the fifth passage and the eighth passage of the flat valve are respectively blocked by the moving valve plate. When the flat valve is in the backwashing working position, the first passage, the second passage, the third passage, the fourth passage, the fifth passage and the eighth passage of the flat valve are respectively blocked by the moving valve plate.

10. The water purifier according to claim 5, wherein When the flat valve is in a standby working position, the first passage, the second passage, the third passage, the fourth passage, the fifth passage, the eighth passage, the ninth passage, the tenth passage and the eleventh passage of the flat valve are blocked by the moving valve disc, the sixth passage and the seventh passage of the flat valve are blocked by the first fluid control surface of the fixed valve disc.

11. The water purifier according to claim 3 or 9, characterized by The first fluid control surface of the fixed valve disc of the flat valve forms a center portion, an extension portion extending outward from the center portion and an edge portion extending outward from the extension portion, wherein the first passage, the eighth passage and the tenth passage of the flat valve extend from the edge portion of the first fluid control surface of the fixed valve disc respectively, the second passage, the third passage, the fourth passage, the fifth passage, the ninth passage and the eleventh passage of the flat valve extend from the extension portion of the first fluid control surface of the fixed valve disc respectively, the second fluid control surface of the moving valve disc of the flat valve forms a center area, an extension area extending outward from the center area and an edge area extending outward from the extension area, the sixth passage of the flat valve extends from the edge area of the second fluid control surface of the moving valve disc, the seventh passage extends from the extension area of the second fluid control surface of the moving valve disc.

12. The water purifier according to claim 11, wherein The first passage, the second passage, the third passage, the fourth passage, the fifth passage, the eighth passage, the ninth passage, the tenth passage and the eleventh passage of the flat valve are arranged separately on the first fluid control surface of the fixed valve disc; the sixth passage and the seventh passage of the flat valve are arranged separately on the second fluid control surface of the moving valve disc.

13. The water purifier according to claim 3, 4, 5, 6, 7, 8, 9 or 10, wherein The raw water inlet and the sixth passage are communicated with the valve cavity respectively, the seventh passage of the moving valve disc is a through blind hole.

14. A water purifier characterized by comprising: Comprise: a control valve for controlling water flow; and A filter device for purifying raw water, wherein the filter device comprises a housing, a primary filter element and a secondary filter element, wherein the housing forms a first receiving cavity, wherein the primary filter element and the secondary filter element are both disposed in the first receiving cavity of the housing, and the housing and the primary filter element form a raw water passage therebetween, the primary filter element and the secondary filter element form a purified water passage therebetween, and the secondary filter element has a purified water outlet, wherein the filter device has a first communication opening, a second communication opening and a third communication opening, the control valve comprises a valve body and a valve core, wherein the valve body forms a valve cavity, a first opening, a second opening, a third opening, a fourth opening, a fifth opening, a raw water inlet and a blowdown opening, wherein the first communication opening of the filter device is in communication with the raw water passage of the filter device, the second communication opening of the filter device is in communication with the purified water passage of the filter device, the third communication opening of the filter device is in communication with the purified water outlet of the secondary filter element, and the valve core is disposed in the valve cavity, wherein the first opening of the valve body is adapted to be in communication with the first communication opening of the filter device, the second opening of the valve body is adapted to be in communication with the second communication opening of the filter device, the fourth opening of the valve body is adapted to be in communication with the third communication opening of the filter device, and the raw water inlet of the valve body is adapted to be in communication with a raw water source, wherein the control valve is a flat valve, wherein the valve core further comprises a stationary valve disc and a movable valve disc, wherein the stationary valve disc has a first fluid control surface, the movable valve disc has a second fluid control surface, wherein the movable valve disc and the stationary valve disc are both disposed in the valve cavity, the second fluid control surface of the movable valve disc is disposed on the first fluid control surface of the stationary valve disc, and the movable valve disc is disposed to be rotatable relative to the stationary valve disc, and the flat valve has a first passage, a second passage, a third passage, a fourth passage, a fifth passage, a sixth passage, a seventh passage and a raw water inlet passage, wherein the first passage, the second passage, the third passage, the fourth passage, the fifth passage and the raw water inlet passage are respectively provided on the stationary valve disc and respectively extend from the first fluid control surface of the stationary valve disc; The sixth passage and the seventh passage are respectively arranged in the movable valve plate and respectively extend from the second fluid control surface of the movable valve plate, wherein the first passage is communicated with the first opening, the second passage is communicated with the second opening, the third passage is communicated with the third opening, the fourth passage is communicated with the fourth opening, the fifth passage is communicated with the fifth opening, and the raw water inlet passage is respectively communicated with the sixth passage and the raw water inlet, wherein when the flat valve is in a first purification working position, the sixth passage of the flat valve is respectively communicated with the raw water inlet passage and the first passage, so as to form a first communication passage communicated with the raw water inlet and the first opening respectively, and the seventh passage is respectively communicated with the fourth passage and the fifth passage, so as to form a second communication passage communicated with the fourth opening and the fifth opening respectively.

15. The water purifier of claim 14, wherein The flat valve further has an eighth passage, wherein the eighth passage is arranged in the fixed valve plate and extends from the first fluid control surface of the fixed valve plate, the eighth passage is communicated with the first opening, when the flat valve is in a second purification working position, the sixth passage of the flat valve is respectively communicated with the raw water inlet passage and the eighth passage, so as to form a third communication passage communicated with the raw water inlet and the first opening respectively, and the seventh passage is respectively communicated with the second passage and the third passage, so as to form a fourth communication passage communicated with the second opening and the third opening respectively.

16. The water purifier of claim 15, wherein The flat valve further has a ninth passage, a tenth passage and an eleventh passage, wherein the ninth passage, the tenth passage and the eleventh passage are respectively arranged in the fixed valve plate and respectively extend from the first fluid control surface of the fixed valve plate, wherein the ninth passage is communicated with the blowdown opening, the tenth passage is communicated with the second opening, and the eleventh passage is communicated with the first opening, when the flat valve is in a backwashing working position, the sixth passage of the flat valve is respectively communicated with the raw water inlet passage and the tenth passage, so as to form a fifth communication passage communicated with the raw water inlet and the second opening respectively, and the seventh passage is respectively communicated with the ninth passage and the eleventh passage, so as to form a sixth communication passage communicated with the first opening and the blowdown opening respectively.

17. The water purifier of claim 14, wherein When the flat valve is in a standby working position, the sixth passage of the flat valve is only communicated with the raw water inlet passage.

18. The water purifier of claim 14, wherein When the flat valve is in the first purification working position, the second passage and the third passage of the flat valve are respectively blocked by the movable valve plate.

19. The water purifier of claim 15, wherein When the flat valve is in the second purification working position, the first passage, the fourth passage and the fifth passage of the flat valve are respectively blocked by the movable valve plate.

20. The water purifier of claim 16, wherein When the flat valve is in the backwashing working position, the first passage, the second passage, the third passage, the fourth passage, the fifth passage and the eighth passage of the flat valve are respectively blocked by the movable valve plate.

21. The water purifier of claim 16, wherein When the flat valve is in a standby working position, the first passage, the second passage, the third passage, the fourth passage, the fifth passage, the eighth passage, the ninth passage, the tenth passage and the eleventh passage of the flat valve are blocked by the movable valve disc respectively, the sixth passage of the flat valve is only communicated with the raw water inlet passage, and the seventh passage is blocked by the first fluid control surface of the fixed valve disc.

22. The water purifier according to claim 16 or 20, wherein The first fluid control surface of the fixed valve disc of the flat valve forms a center portion, an extension portion extending outward from the center portion, and an edge portion extending outward from the extension portion, wherein the first passage, the eighth passage and the tenth passage of the flat valve extend from the extension portion of the first fluid control surface of the fixed valve disc respectively, the second passage, the third passage, the fourth passage, the fifth passage, the ninth passage and the eleventh passage of the flat valve extend from the edge portion of the first fluid control surface of the fixed valve disc respectively, the raw water inlet passage extends from the center portion of the first fluid control surface of the fixed valve disc, the second fluid control surface of the movable valve disc of the flat valve forms a center region, an extension region extending outward from the center region, and an edge region extending outward from the extension region, the sixth passage of the flat valve extends from the center region and the extension region of the second fluid control surface of the movable valve disc, and the seventh passage extends from the edge region of the second fluid control surface of the movable valve disc.

23. The water purifier of claim 22, wherein The first passage, the second passage, the third passage, the fourth passage, the fifth passage, the eighth passage, the ninth passage, the tenth passage and the eleventh passage of the flat valve are arranged separately on the first fluid control surface of the fixed valve disc; and the sixth passage and the seventh passage of the flat valve are arranged separately on the second fluid control surface of the movable valve disc.

24. The water purifier of claims 14, 15, 16, 17, 18, 19, 20, or 21, wherein, The sixth passage and the seventh passage of the movable valve disc are through blind holes. The first fluid control surface of the fixed valve disc of the flat valve forms a center portion, an extension portion extending outward from the center portion, and an edge portion extending outward from the extension portion, wherein the first passage, the eighth passage and the tenth passage of the flat valve extend from the extension portion of the first fluid control surface of the fixed valve disc respectively, the second passage, the third passage, the fourth passage, the fifth passage, the ninth passage and the eleventh passage of the flat valve extend from the edge portion of the first fluid control surface of the fixed valve disc respectively, the raw water inlet passage extends from the center portion of the first fluid control surface of the fixed valve disc, the second fluid control surface of the movable valve disc of the flat valve forms a center region, an extension region extending outward from the center region, and an edge region extending outward from the extension region, the sixth passage of the flat valve extends from the center region and the extension region of the second fluid control surface of the movable valve disc, and the seventh passage extends from the edge region of the second fluid control surface of the movable valve disc. The sixth passage and the seventh passage of the movable valve disc are through blind holes.

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