Water purification system

Abstract

The utility model discloses a water purification system, and relates to the technical field of water treatment, and the water purification system comprises a water inlet waterway; an inlet of the second filtering assembly is communicated with an outlet of the water inlet path; an inlet of the purified water output water path is communicated with a purified water outlet of the second filtering assembly; the functional assembly can release functional components into water flowing through the functional assembly, and an inlet of the functional assembly is communicated with the purified water outlet of the second filtering assembly; one end of the water return waterway is communicated with the outlet of the functional assembly, and the other end of the water return waterway is communicated with the inlet of the second filtering assembly or the water inlet waterway; the water return waterway, the second filter assembly and the functional assembly can form a circulating waterway; and the driving pump is arranged on the circulating water path. According to the water purification system, the consumption of the functional assembly can be effectively reduced, and the purified water outlet flow of the water purification system can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a water purification system. Background Art

[0002] As demand for drinking water quality continues to rise, existing water purification systems are undergoing continuous design innovation. In existing water purification systems, a functional component is typically placed upstream of the fine filter assembly. This design requires that raw water entering the fine filter assembly first pass through the functional component, which releases functional components into the flowing water, thereby imbuing the raw water with functional components. This functional component, when filtered through the fine filter assembly, then serves the corresponding functional function of the fine filter assembly.

[0003] However, this design also has certain disadvantages. On the one hand, since the functional component is arranged upstream of the fine filtration component, the raw water input to the fine filtration component needs to pass through the functional component, which will affect the water output flow of the water purification device and cannot meet the user's demand for quick access to purified water; on the other hand, all raw water needs to pass through the functional component, which will increase the consumption of the functional component and increase the cost of use and maintenance frequency. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiment of the present utility model is to provide a water purification system, which can not only effectively reduce the consumption of functional components, but also ensure the purified water outlet flow rate of the water purification system.

[0005] The specific technical solution of the embodiment of the utility model is:

[0006] A water purification system, comprising:

[0007] water inlet waterway;

[0008] a second filter assembly, wherein the inlet of the second filter assembly is connected to the outlet of the water inlet waterway;

[0009] a purified water output waterway, the inlet of which is in communication with the purified water outlet of the second filter assembly;

[0010] a functional component capable of releasing functional ingredients into the water flowing therethrough, wherein the inlet of the functional component is in communication with the purified water outlet of the second filter component;

[0011] a return water channel, one end of which is connected to the outlet of the functional component, and the other end of which is connected to the inlet of the second filter component or the water inlet channel; the return water channel, the second filter component and the functional component can form a circulating water channel;

[0012] A driving pump is provided on the circulating water path.

[0013] Preferably, the water purification system further comprises:

[0014] The first filter component, the water inlet side of the first filter component is connected to the clean water outlet of the second filter component; the inlet of the functional component is connected to the clean water outlet of the second filter component or the water outlet side of the first filter component.

[0015] Preferably, the first filter component and the functional component form a composite filter element, and the composite filter element comprises:

[0016] a housing having a first inlet, a first outlet, and a second outlet;

[0017] The functional component and the first filter component are arranged in the shell, the first inlet is connected to the water inlet side of the first filter component, the first outlet is connected to the water outlet side of the first filter component, the second outlet is connected to the outlet of the functional component, and the inlet of the functional component is connected to the first inlet and / or the water outlet side of the first filter component.

[0018] Preferably, the composite filter element further comprises: a first one-way conducting component disposed in the housing, wherein the first one-way conducting component allows the first inlet and / or the water outlet side of the first filter component to be conducted toward the inlet of the functional component.

[0019] Preferably, the functional component and the first filter component are arranged along the axial direction of the composite filter element.

[0020] Preferably, the composite filter element further comprises: a guide tube arranged in the shell, the first filter component is sleeved outside the guide tube, one end of the guide tube is connected to the outlet of the functional component, and the other end of the guide tube is connected to the second outlet.

[0021] Preferably, a first flow channel is formed between the outer side wall of the first filter assembly and the outer shell, and a second flow channel is formed between the inner side wall of the first filter assembly and the outer side wall of the flow guide tube;

[0022] The functional component includes a containing shell and a functional material arranged in the containing shell; a third flow channel is formed between the outer side wall of the containing shell and the inner side wall of the outer shell; one end of the flow guide tube is connected to the outlet of the containing shell; one end of the third flow channel is connected to the inlet of the containing shell; and the other end of the third flow channel is connected to the second flow channel or the first flow channel.

[0023] Preferably, a first raised ring and a second raised ring extending in the axial direction of the shell are formed at one end of the interior of the shell away from the functional component, the second raised ring is located inside the first raised ring, and a first annulus is formed between the first raised ring and the inner side wall of the shell; the guide tube is inserted into the second raised ring and maintained sealed, and the interior of the second raised ring is connected to the second outlet; the first filter assembly has an upper end cover for sealing the end of the first filter assembly at one end away from the functional component; the upper end cover includes an upper end cover body extending in the radial direction of the first filter assembly and an inserting portion extending in the axial direction of the first filter assembly, the guide tube passes through the upper end cover body and the inserting portion, a gap is formed between the inserting portion and the outer side wall of the guide tube, the inserting portion is inserted into the first raised ring and maintained sealed, and a second annulus is formed between the first raised ring and the second raised ring; the second flow channel is connected to the second annulus through the gap between the inserting portion and the outer side wall of the guide tube; the first annulus, the second annulus, the first inlet and the first outlet are connected one-to-one.

[0024] Preferably, the outer side wall of the first filter component is the water inlet side of the first filter component, and the first flow channel is connected to the first inlet; the inner side wall of the first filter component is the water outlet side of the first filter component, and the second flow channel is connected to the first outlet.

[0025] Preferably, the inner side wall of the first filter component is the water inlet side of the first filter component, and the first flow channel is connected to the first outlet; the outer side wall of the first filter component is the water outlet side of the first filter component, and the second flow channel is connected to the first inlet.

[0026] Preferably, when the other end of the third flow channel is connected to the second flow channel, the first filter component has a lower end cover at one end close to the functional component, and a seal is provided between the lower end cover and the outer shell; a connecting flow channel is provided between the lower end cover and the accommodating shell, and the connecting flow channel connects the third flow channel and the second flow channel.

[0027] Preferably, the lower end cover is used to seal the lower end surface of the first filter assembly, and the lower end cover includes a lower end cover body extending in a radial direction of the first filter assembly, a lower end cover extension portion extending in an axial direction of the first filter assembly, and a lower end cover inner extension portion extending in an axial direction of the first filter assembly; the first filter assembly is located between the lower end cover extension portion and the lower end cover inner extension portion; the sealing member is provided between the lower end cover extension portion and the outer shell, and a gap is provided between the lower end cover inner extension portion and the outer side wall of the guide tube, and a protrusion is provided between the lower end cover body and the accommodating shell so that a gap is provided between the lower end cover body and the accommodating shell, thereby forming the connecting flow channel; the second flow channel is connected to the third flow channel through the gap between the lower end cover inner extension portion and the outer side wall of the guide tube.

[0028] Preferably, when the other end of the third flow channel is connected to the first flow channel, the first filter component has a lower end cover at one end close to the functional component, and the lower end cover is sealed with the guide tube and / or the accommodating shell.

[0029] Preferably, the composite filter element also includes: a first one-way conductive component arranged in the outer shell, a recessed installation space is formed on the accommodating shell, the first one-way conductive component is installed in the installation space, an inlet is formed on the accommodating shell corresponding to the installation space, and the outlet of the first one-way conductive component is connected to the inlet of the accommodating shell.

[0030] Preferably, the composite filter element further comprises: a first one-way conducting component disposed in the housing, the first one-way conducting component allowing the first inlet and / or the water outlet side of the first filter assembly to be conducted toward the inlet of the functional assembly;

[0031] The first one-way conductive component is located at one end of the functional component away from the first filter component, and the first one-way conductive component extends along the radial direction of the composite filter element so that the outlet of the first one-way conductive component and the inlet of the accommodating shell are located near the middle of the accommodating shell.

[0032] Preferably, the functional component and the first filter component are arranged along the radial direction of the composite filter element.

[0033] Preferably, the first filter assembly is sleeved outside the functional assembly, a first flow channel is formed between the outer side wall of the first filter assembly and the outer shell, and a second flow channel is formed between the inner side wall of the first filter assembly and the outer side wall of the functional assembly;

[0034] The outer side wall of the first filter component is the water inlet side of the first filter component, and the first flow channel is connected to the first inlet; the inner side wall of the first filter component is the water outlet side of the first filter component, and the second flow channel is connected to the first outlet; the second flow channel is connected to the inlet of the functional component.

[0035] Preferably, the first filter component has a lower end cover at one end close to the functional component, and the lower end cover is used to seal the lower end surface of the first filter component and the lower end of the space inside the first filter component; the functional component is arranged in the accommodating space formed by the first filter component and the lower end cover.

[0036] Preferably, a first raised ring and a second raised ring extending in the axial direction of the shell are formed at the upper end of the interior of the shell, and the second raised ring is located inside the first raised ring; the outlet of the functional component is inserted into and sealed with the second raised ring, and the interior of the second raised ring is connected to the second outlet; the upper end of the first filter assembly has an upper end cover for sealing the end of the first filter assembly; the upper end cover includes an upper end cover body extending in the radial direction of the first filter assembly and an insert portion extending in the axial direction of the first filter assembly, the functional component passes through the upper end cover body and the insert portion, and there is a gap between the insert portion and the outer wall of the functional component, the insert portion is inserted into and sealed with the first raised ring, and a second annulus is formed between the first raised ring and the second raised ring; the second flow channel is connected to the second annulus through the gap between the insert portion and the outer wall of the functional component; a first annulus is formed between the first raised ring or the insert portion and the inner side wall of the shell, the first annulus is connected to the first inlet, and the second annulus is connected to the first outlet.

[0037] Preferably, the functional material in the functional component includes at least one of the following: scale-inhibiting material, bactericidal material, and bacteriostatic material.

[0038] Preferably, the first filter assembly includes a post-filter assembly.

[0039] Preferably, the water purification system has a first state. In the first state, the driving pump is in an open state, so that the clean water output from the clean water outlet of the second filter component passes through the functional component and the return water channel and then flows back to the second filter component.

[0040] Preferably, the water purification system further comprises: a wastewater discharge waterway, the wastewater discharge waterway being connected to the wastewater outlet of the second filter assembly, and a control assembly having an on-off function and a wastewater ratio function being provided on the wastewater discharge waterway;

[0041] The water inlet waterway is provided with a accommodating chamber component capable of accommodating water, and the accommodating chamber component is located on the circulating waterway.

[0042] Preferably, the water purification system has a first state. In the first state, the driving pump is in an on state, and the clean water output from the clean water outlet of the second filter component passes through the functional component and the return water channel and then flows back to the accommodating chamber component, so that the accommodating chamber component stores water with functional components.

[0043] Preferably, in the first state, the control component is in a disconnected state;

[0044] or,

[0045] The water purification system further comprises: an inlet valve provided on the inlet waterway, the return waterway being connected to the inlet waterway downstream of the inlet valve, and in the first state, the control component is in a wastewater ratio function, and the inlet valve is in an open state;

[0046] or,

[0047] The water purification system also includes: a first water channel, one end of the first water channel is connected to the wastewater outlet of the second filter component, and the other end of the first water channel is connected to the inlet of the second filter component or the water inlet channel. In the first state, the first water channel is in a connected state, and the wastewater output from the wastewater outlet of the second filter component flows back to the inlet of the second filter component through the first water channel or flows back to the inlet of the accommodating chamber component through the first water channel and the water inlet channel.

[0048] Preferably, the water purification system further comprises: an inlet valve provided on the inlet waterway, the return waterway being connected to the inlet waterway downstream of the inlet valve;

[0049] The water purification system has a second state. In the second state, the water inlet valve is in an open state, the control component is in a connected state, raw water flows into the water inlet waterway, and the water with functional ingredients in the accommodating chamber component flows into the second filter component, so that the raw water in the second filter component is replaced by water with functional ingredients, and the wastewater generated by the wastewater outlet of the second filter component is discharged through the wastewater discharge waterway.

[0050] Preferably, the water purification system further comprises: a first waterway, one end of the first waterway being connected to the wastewater outlet of the second filter assembly, the drive pump being located on the water inlet waterway, and the other end of the first waterway being connected to the inlet of the accommodating chamber assembly and connected upstream of the drive pump;

[0051] The water purification system has a second state. In the second state, the driving pump is in an operating state, the first water channel is in a connected state, the wastewater discharged from the wastewater outlet of the second filter component enters the inlet of the accommodating chamber component through the first water channel, and the water with functional ingredients in the accommodating chamber component flows into the inlet of the second filter component, so that the raw water in the second filter component is replaced by water with functional ingredients.

[0052] Preferably, in the second state, the control component is in the wastewater ratio function, and the clean water output from the clean water outlet of the second filter component flows back through the return waterway.

[0053] Preferably, in the second state, the control component is in a disconnected state, and the clean water output from the clean water outlet of the second filter component flows back through the return water path.

[0054] Preferably, the second state of the water purification system is performed after the first state.

[0055] Preferably, the accommodating chamber assembly and the second filter assembly are formed in the same filter element, and the other end of the first waterway is connected to the water inlet waterway upstream of the inlet of the accommodating chamber assembly.

[0056] Preferably, when the accommodating chamber assembly and the second filter assembly are independent components, the other end of the first waterway is connected between the inlet of the second filter assembly and the outlet of the accommodating chamber assembly.

[0057] Preferably, a second one-way conducting component is provided on the first waterway, and the second one-way conducting component allows the wastewater outlet of the second filter assembly to be conducted toward the inlet of the second filter assembly or the water inlet waterway.

[0058] Preferably, a third one-way conducting component is provided on the return waterway, and the third one-way conducting component enables the purified water outlet of the second filter assembly or the purified water output waterway to be conducted toward the inlet of the second filter assembly or the water inlet waterway.

[0059] Preferably, the accommodating chamber assembly at least includes: a pre-filter assembly.

[0060] Preferably, the second filter assembly includes at least one of the following: a reverse osmosis membrane filter assembly, a nanofiltration membrane filter assembly, and an ultrafiltration membrane filter assembly.

[0061] Preferably, the water purification system further comprises: a first one-way conducting component, wherein the first one-way conducting component enables the purified water outlet of the second filter assembly and / or the water outlet side of the first filter assembly to be conducted toward the inlet of the functional assembly;

[0062] The water purification system has a water production state. In the water production state, raw water input from the water inlet waterway flows into the second filter component, the purified water outlet of the second filter component outputs purified water and is output from the purified water output waterway, and the first one-way conductive component is in a disconnected state.

[0063] Preferably, the water purification system further comprises:

[0064] a first filter assembly, wherein the water inlet side of the first filter assembly is in communication with the purified water outlet of the second filter assembly; and the inlet of the functional assembly is in communication with the purified water outlet of the second filter assembly or the water outlet side of the first filter assembly;

[0065] The water purification system further includes: a first one-way conducting component, wherein the first one-way conducting component connects the purified water outlet of the second filter assembly and / or the water outlet side of the first filter assembly to the inlet of the functional assembly;

[0066] In the first state, the first one-way conductive component is in a connected state.

[0067] The technical solution of the utility model has the following significant beneficial effects:

[0068] 1. In the water purification system of this application, when in the water production state, raw water input from the water inlet circuit flows into the second filter assembly. The purified water output from the second filter assembly flows into the purified water output circuit, and is finally supplied to the user. Therefore, during the entire water production state, the purified water output from the purified water output circuit can completely bypass the functional components. This not only effectively reduces the consumption of the functional components, but also reduces the hydraulic resistance of the entire water purification system, thereby ensuring the purified water output flow rate of the water purification system.

[0069] 2. The clean water output from the clean water outlet of the second filter component can enter the functional component. The clean water output from the clean water outlet of the second filter component has functional components when passing through the functional component. The clean water with functional components flows back to the second filter component. The clean water with functional components can stay in the second filter component all the time, thereby performing corresponding treatment on the second filter component.

[0070] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportional dimensions of the components in the drawings are for illustrative purposes only and are intended to facilitate understanding of the present invention. They are not intended to limit the shapes and proportional dimensions of the components of the present invention. Those skilled in the art, guided by the present invention, may select various possible shapes and proportional dimensions to implement the present invention, depending on the specific circumstances.

[0072] Figure 1 This is a schematic structural diagram of a water purification system in a first embodiment of the present utility model;

[0073] Figure 2 This is a schematic structural diagram of a water purification system in a second embodiment of the present utility model;

[0074] Figure 3 This is a schematic structural diagram of a water purification system in a third embodiment of the present utility model;

[0075] Figure 4 This is a schematic structural diagram of a water purification system in a fourth embodiment of the present utility model;

[0076] Figure 5 This is a schematic structural diagram of the composite filter element in the first embodiment of the present utility model;

[0077] Figure 6 This is a schematic structural diagram of the composite filter element in the second embodiment of the present utility model.

[0078] Reference numerals in the above drawings:

[0079] 1. Water inlet circuit; 2. Second filter assembly; 3. Clean water output circuit; 4. Return water circuit; 5. Drive pump; 6. Wastewater discharge circuit; 7. Control assembly; 8. Water inlet valve; 9. Composite filter element; 91. Housing; 9101. First raised ring; 9102. Second raised ring; 9103. First annulus; 9104. Second annulus; 92. First one-way conducting component; 93. Functional assembly; 931. Containing housing; 932. Functional material; 94. First filter assembly; 941. Upper end cap; 9411. Upper end cap body; 9412, insert portion; 942, lower end cover; 9421, lower end cover body; 9422, lower end cover extension; 9423, lower end cover inner extension; 95, flow guide tube; 96, first flow channel; 97, second flow channel; 98, sealing member; 99, third flow channel; 910, connecting flow channel; 911, first inlet; 912, first outlet; 913, second outlet; 10, first waterway; 11, second one-way conducting component; 12, third one-way conducting component; 13, accommodating chamber assembly; 14, opening and closing valve; 15, small hole structure. DETAILED DESCRIPTION

[0080] The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are intended solely for the purpose of illustrating the present invention and should not be construed as limiting the present invention in any way. Based on the teachings of the present invention, skilled artisans can conceive of any possible variations based on the present invention, all of which should be considered within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "mounted," "connected," and "connected" should be interpreted broadly, for example, to mean mechanical or electrical connections, internal communication between two elements, direct connection, or indirect connection through an intermediary. The specific meanings of these terms will be understood by those skilled in the art based on the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0081] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0082] In order to effectively reduce the consumption of functional components and ensure the water flow rate of the water purification system, a water purification system is proposed in this application. Figure 1 FIG. 1 is a schematic structural diagram of a water purification system in a first embodiment of the present utility model. Figure 1 As shown, the water purification system may include: an inlet waterway 1; a second filter component 2, the inlet of the second filter component 2 is connected to the outlet of the inlet waterway 1; a clean water output waterway 3, the inlet of the clean water output waterway 3 is connected to the clean water outlet of the second filter component 2; a functional component 93, the functional component 93 can release functional components into the water flowing through, and the inlet of the functional component 93 is connected to the clean water outlet of the second filter component 2; a return waterway 4, one end of the return waterway 4 is connected to the outlet of the functional component 93, and the other end of the return waterway 4 is connected to the inlet of the second filter component 2 or the inlet waterway 1; the return waterway 4, the second filter component 2 and the functional component 93 can form a circulating waterway; and a driving pump 5 is arranged on the circulating waterway.

[0083] In the water purification system of this application, when in the water production state, raw water input from the water inlet waterway 1 flows into the second filter assembly 2. The purified water output from the purified water outlet of the second filter assembly 2 flows into the purified water output waterway 3, and is finally supplied to the user. Therefore, during the entire water production state, the purified water output from the purified water output waterway 3 can completely bypass the functional component 93. This not only effectively reduces the consumption of the functional component 93, but also reduces the water resistance of the entire water purification system, thereby ensuring the purified water output flow rate of the water purification system.

[0084] The second filter assembly 2 can be a filter assembly that primarily filters water. It can optionally include at least one of the following: a reverse osmosis membrane filter assembly, a nanofiltration membrane filter assembly, an ultrafiltration membrane filter assembly, and the like. The water inlet circuit 1 is connected to a water source. The purified water outputted by the purified water output circuit 3 is then supplied to the user.

[0085] As feasible, Figure 2 FIG. 1 is a schematic structural diagram of a water purification system in a second embodiment of the present utility model. Figure 2 As shown, the water purification system may include: a first filter component 94, the water inlet side of the first filter component 94 is connected to the clean water outlet of the second filter component 2; the inlet of the functional component 93 is connected to the clean water outlet of the second filter component 2 or the water outlet side of the first filter component 94.

[0086] As is feasible, the first filter component 94 and the functional component 93 form a composite filter element.

[0087] In one possible embodiment, Figure 5 This is a schematic structural diagram of the composite filter element in the first embodiment of the present utility model. Figure 6 FIG. 1 is a schematic structural diagram of a composite filter element in a second embodiment of the present utility model. Figure 5 and Figure 6 As shown, the composite filter element 9 may include: a shell 91 having a first inlet 911, a first outlet 912 and a second outlet 913; a functional component 93 and a first filter component 94 arranged in the shell 91, and the functional component 93 can release functional components into the water flowing through; the first inlet 911 is connected to the water inlet side of the first filter component 94, the first outlet 912 is connected to the outlet of the first filter component 94, the second outlet 913 is connected to the outlet of the functional component 93, and the inlet of the functional component 93 is connected to the first inlet 911 and / or the outlet of the first filter component 94.

[0088] Water can be input into the composite filter element 9 through the first inlet 911. Then, depending on specific needs, in one embodiment, when water needs to be filtered, the water to be filtered can flow into the water inlet side of the first filter assembly 94, pass through the first filter assembly 94, and then be discharged from the first outlet 912. In another embodiment, water can flow into the inlet of the functional assembly 93, pass through the functional assembly 93, so that the functional assembly 93 releases functional components into the water flowing through it, and the water containing the functional components is discharged from the second outlet 913. In this embodiment, water can flow directly into the inlet of the functional assembly 93, pass through the functional assembly 93, or first flow into the water inlet side of the first filter assembly 94, pass through the first filter assembly 94, and then flow into the inlet of the functional assembly 93, pass through the functional assembly 93, and then the water containing the functional components is discharged from the second outlet 913. When water only needs to be filtered, the filtered water can flow into the water inlet side of the first filter assembly 94, pass through the first filter assembly 94, and then be discharged from the first outlet 912. In this case, the water does not need to pass through the functional assembly 93, and the water flow rate will not be reduced due to the need to pass through the functional assembly 93, thereby ensuring the water flow rate of the composite filter element 9 and effectively reducing the consumption of the functional assembly 93. When it is necessary to release functional components into the water, the water can be allowed to flow into the inlet of the functional assembly 93 and pass through the functional assembly 93, so that the functional assembly 93 releases the functional components into the flowing water.

[0089] In one feasible embodiment, the first filter assembly 94 may include a post-filter assembly. The composite filter element 9 may be positioned downstream of the filter assembly that performs the primary filtration function in the water purification system. The post-filter assembly may be any filter assembly that performs a post-filtration function in existing water purification systems, such as an activated carbon filter element, a mineralized filter element, an ultrafiltration membrane filter element, and the like, and is not limited in this application.

[0090] When water flows through the functional component 93, the functional component 93 can release some functional components with specific functions into the flowing water. These functional components can be functional components with scale inhibition, bactericidal function, or antibacterial function. In one feasible embodiment, the functional material 932 in the functional component 93 can include at least one of the following: scale inhibition material, bactericidal material, and antibacterial material. For example, the scale inhibition material can be phosphate, organic phosphonic acid, polymer material, etc.; the bactericidal material can be a chlorine-containing bactericide, a material containing silver ions, etc. The antibacterial material can be a nanosilver material, silver-loaded glass, etc. In order to make the functional component 93 have both scale inhibition and antibacterial functions, the functional material 932 can be silver-loaded phosphate glass.

[0091] The water purification system further includes: a first one-way conducting component 92 , which allows the purified water outlet of the second filter assembly 2 and / or the water outlet side of the first filter assembly 94 to be conducted toward the inlet direction of the functional assembly 93 .

[0092] Furthermore, a first one-way conducting member 92 can be disposed within the housing 91, and the composite filter element 9 can include this first one-way conducting member 92. The first one-way conducting member 92 allows the first inlet 911 and / or the outlet of the first filter assembly 94 to be connected to the inlet of the functional assembly 93. The first one-way conducting member 92 effectively prevents water containing functional components in the functional assembly 93 from diffusing into the first filter assembly 94, ensuring that only water flowing into the water inlet side of the first filter assembly 94, filtered by the first filter assembly 94, and discharged from the first outlet 912 also contains the functional components.

[0093] As a feasible option, the water purification system has a water production state. In this state, raw water input from the water inlet waterway 1 flows into the second filter assembly 2, and the purified water output from the purified water outlet of the second filter assembly 2 flows into the purified water output waterway, and finally is output for consumption by the user. In this state, since the purified water output waterway 3 is connected to the outside world, the first one-way conductive member 92 is in a disconnected state.

[0094] As a feasible option, the water purification system has a water production state. In this state, raw water input from the water inlet waterway 1 flows into the second filter assembly 2. The purified water output from the purified water outlet of the second filter assembly 2 flows into the first inlet 911 of the composite filter element 9. The purified water is filtered in the composite filter element 9 by the first filter assembly 94, then flows out of the composite filter element 9 through the first outlet 912 and finally output through the purified water output waterway 3. In this state, since the purified water output waterway 3 is connected to the outside world, the first one-way conductive component 92 is disconnected.

[0095] The functional components 93 and the first filter assembly 94 in the composite filter element 9 can be arranged in a variety of ways. The functional components 93 and the first filter assembly 94 can be arranged along the axis of the composite filter element 9, which effectively reduces the radial dimension of the composite filter element 9. Alternatively, they can be arranged along the radial direction of the composite filter element 9, which effectively reduces the axial dimension of the composite filter element 9.

[0096] When the functional component 93 and the first filter component 94 are arranged along the axial direction of the composite filter element 9, it is feasible to Figure 5As shown, the composite filter element 9 may include a flow guide tube 95 disposed within a housing 91. A first filter assembly 94 is sleeved over the flow guide tube 95. One end of the flow guide tube 95 communicates with the outlet of the functional assembly 93, and the other end of the flow guide tube 95 communicates with the second outlet 913. This arrangement allows the first inlet 911, first outlet 912, and second outlet 913 of the composite filter element 9 to be located at the same end of the housing 91.

[0097] Alternatively, a first flow channel 96 is formed between the outer wall of the first filter assembly 94 and the outer shell 91, and a second flow channel 97 is formed between the inner wall of the first filter assembly 94 and the outer wall of the flow guide tube 95. Functional assembly 93 may include a housing 931 and functional material 932 disposed therein. A third flow channel 99 is formed between the outer wall of the housing 931 and the inner wall of the outer shell 91. One end of the flow guide tube 95 communicates with the outlet of the housing 931. One end of the third flow channel 99 communicates with the inlet of the housing 931. The other end of the third flow channel 99 communicates with either the second flow channel 97 or the first flow channel 96.

[0098] The end of the first filter assembly 94 away from the functional assembly 93 includes an upper end cap 941 for sealing the end of the first filter assembly 94. The upper end cap 941 includes an upper end cap body 9411 extending in the radial direction of the first filter assembly 94 and an insert portion 9412 extending in the axial direction of the first filter assembly 94. The insert portion 9412 extends upward. The upper end cap 941 may also include an upper end cap extension portion extending in the axial direction of the first filter assembly 94 and an upper end cap inner extension portion extending in the axial direction of the first filter assembly 94. The first filter assembly 94 is located between the upper end cap extension portion and the upper end cap inner extension portion.

[0099] The flow guide pipe 95 passes through the upper end cover body 9411, the insertion portion 9412 and the inner extension of the upper end cover. There is a gap between the insertion portion 9412 and the outer wall of the flow guide pipe 95, so that water in the second flow channel 97 can flow out upward.

[0100] A first raised ring 9101 and a second raised ring 9102 are formed on the end of the housing 91 away from the functional assembly 93, extending in the axial direction of the housing 91. The second raised ring 9102 is located within the first raised ring 9101. A first annulus 9103 is formed between the first raised ring 9101 and the inner sidewall of the housing 91. The insert 9412 is inserted into and sealed with the first raised ring 9101, thereby connecting the first flow channel 96 to the first annulus 9103. For example, the insert 9412 can be inserted into the first raised ring 9101, with a sealing ring maintaining a seal between the outer wall of the insert 9412 and the inner wall of the first raised ring 9101.

[0101] A second annulus 9104 is formed between the first raised ring 9101 and the second raised ring 9102. The second flow channel 97 communicates with the second annulus 9104 through the gap between the insert portion 9412 and the outer wall of the flow guide tube 95. The flow guide tube 95 is inserted into and sealed with the second raised ring 9102. The interior of the second raised ring 9102 communicates with the second outlet 913, thereby allowing the interior of the flow guide tube 95 to communicate with the second outlet 913 through the interior of the second raised ring 9102. For example, the flow guide tube 95 can be inserted into the second raised ring 9102, with the outer wall of the flow guide tube 95 and the inner wall of the second raised ring 9102 maintaining a seal. This method isolates the first annulus 9103, the second annulus 9104, and the interior of the second raised ring 9102 from each other, ensuring that water cross-contamination does not occur.

[0102] The first annulus 9103, the second annulus 9104, the first inlet 911, and the first outlet 912 can be in one-to-one communication. The first annulus 9103 is in communication with the first inlet 911, and the second annulus 9104 is in communication with the first outlet 912. Alternatively, the first annulus 9103 is in communication with the first outlet 912, and the second annulus 9104 is in communication with the first inlet 911.

[0103] In the above embodiment, in one specific embodiment, the outer wall of the first filter assembly 94 serves as the water inlet side of the first filter assembly 94, and the first flow channel 96 is connected to the first inlet 911. The inner wall of the first filter assembly 94 serves as the outlet of the first filter assembly 94, and the second flow channel 97 is connected to the first outlet 912. In this embodiment, water flows into the housing 91 from the first inlet 911 and then into the first flow channel 96. If water only needs to pass through the first filter assembly 94, the water in the first flow channel 96 flows into the outer wall of the first filter assembly 94, passes through the first filter assembly 94, and then flows out from the inner wall of the first filter assembly 94. It then enters the second flow channel 97 and flows out from the first outlet 912. If water needs to flow through the functional component 93, the water in the first flow channel 96 or the water in the second flow channel 97 after flowing through the first filter component 94 flows into the third flow channel 99, and then enters the containing shell 931 through the inlet of the containing shell 931, flows through the functional material 932 in the containing shell 931, and then passes through the outlet of the containing shell 931 through the guide pipe 95 and is discharged from the second outlet 913 of the composite filter element 9.

[0104] In another specific embodiment, the inner sidewall of the first filter assembly 94 serves as the water inlet of the first filter assembly 94, and the first flow channel 96 communicates with the first outlet 912. The outer sidewall of the first filter assembly 94 serves as the outlet of the first filter assembly 94, and the second flow channel 97 communicates with the first inlet 911. In this embodiment, water flows into the housing 91 from the first inlet 911 and then into the second flow channel 97. If water only needs to pass through the first filter assembly 94, the water in the second flow channel 97 flows into the inner sidewall of the first filter assembly 94, passes through the first filter assembly 94, and then flows out of the outer sidewall of the first filter assembly 94. It then enters the first flow channel 96 and flows out of the first outlet 912. If water needs to flow through the functional component 93, the water in the second flow channel 97 or the water in the first flow channel 96 after flowing through the first filter component 94 flows into the third flow channel 99, and then enters the containing shell 931 through the inlet of the containing shell 931, flows through the functional material 932 in the containing shell 931, and then passes through the outlet of the containing shell 931 and the guide pipe 95 and is discharged from the second outlet 913 of the composite filter element 9.

[0105] When the other end of the third flow channel 99 is connected to the second flow channel 97, that is, the other end of the third flow channel 99 is not directly connected to the first flow channel 96, the end of the first filter assembly 94 near the functional assembly 93 can have a lower end cover, and a seal 98 is provided between the lower end cover and the housing 91. The seal 98 separates the third flow channel 99 from the first flow channel 96. A communication flow channel 910 is provided between the lower end cover and the accommodating housing 931, and the communication flow channel 910 connects the third flow channel 99 and the second flow channel 97.

[0106] Specifically, the lower end cap 942 is used to seal the lower end surface of the first filter assembly 94. It includes a lower end cap body 9421 extending radially along the first filter assembly 94, a lower end cap extension 9422 extending axially along the first filter assembly 94, and a lower end cap inner extension 9423 extending axially along the first filter assembly 94. The first filter assembly 94 is located between the lower end cap extension 9422 and the lower end cap inner extension 9423. A seal 98 is provided between the lower end cap extension 9422 and the outer shell 91. A gap is defined between the lower end cap inner extension 9423 and the outer wall of the flow guide 95. A protrusion is provided between the lower end cap body 9421 and the containment housing 931 to create a gap between the lower end cap body 9421 and the containment housing 931, thereby forming a connecting flow channel 910. The second flow channel 97 is connected to the third flow channel 99 through the gap between the inner extension portion 9423 of the lower end cover and the outer wall of the flow guide tube 95 and the connecting flow channel 910.

[0107] When the other end of the third flow channel 99 is connected to the first flow channel 96, that is, the other end of the third flow channel 99 is not directly connected to the second flow channel 97, the first filter component 94 has a lower end cover at one end close to the functional component 93, and the lower end cover is sealed to the guide tube 95 and / or the accommodating shell 931, so that the third flow channel 99 is separated from the second flow channel 97.

[0108] Specifically, a seal 98 can be used to maintain a seal between the inner extension 9423 of the lower end cover and the flow guide 95; alternatively, a seal 98 can be used to maintain a seal between the lower end cover body 9421 and the accommodating shell 931. A gap is provided between the outer extension 9422 of the lower end cover and the outer shell 91, thereby allowing the other end of the third flow channel 99 to communicate with the first flow channel 96.

[0109] Alternatively, the housing 931 may include a recessed mounting space, into which the first one-way conductive component 92 may be mounted. An inlet may be formed in the housing 931 corresponding to the mounting space, with the outlet of the first one-way conductive component 92 communicating with the inlet of the housing 931. Water in the third flow channel 99 must first pass through the first one-way conductive component 92 before entering the functional material 932 within the functional assembly 93 through the inlet of the housing 931.

[0110] Furthermore, the first one-way conducting member 92 is located at the end of the functional assembly 93 that is away from the first filter assembly 94. The first one-way conducting member 92 extends in the radial direction of the composite filter element 9, so that the outlet of the first one-way conducting member 92 and the inlet of the accommodating shell 931 are located near the middle of the accommodating shell 931. This arrangement allows water flowing into the accommodating shell 931 to be located in the middle of the end away from the outlet of the accommodating shell 931. Thus, water flowing into the accommodating shell 931 can fully contact the functional material 932 within the functional assembly 93 before flowing out of the outlet of the accommodating shell 931.

[0111] When the functional component 93 and the first filter component 94 are arranged along the radial direction of the composite filter element 9, as feasible, Figure 6 As shown, the first filter assembly 94 can be sleeved outside the functional assembly 93. A first flow channel 96 is formed between the outer wall of the first filter assembly 94 and the housing 91, and a second flow channel 97 is formed between the inner wall of the first filter assembly 94 and the outer wall of the functional assembly 93. The outer wall of the first filter assembly 94 serves as the water inlet side of the first filter assembly 94, and the first flow channel 96 is connected to the first inlet 911. The inner wall of the first filter assembly 94 serves as the outlet of the first filter assembly 94, and the second flow channel 97 is connected to the first outlet 912. The second flow channel 97 is connected to the inlet of the functional assembly 93.

[0112] In this embodiment, water flows into the housing 91 through the first inlet 911 and then into the first flow channel 96. If the water only needs to pass through the first filter assembly 94, the water in the first flow channel 96 flows into the outer wall of the first filter assembly 94, passes through the first filter assembly 94, and then flows out of the inner wall of the first filter assembly 94. It then enters the second flow channel 97 and flows out of the first outlet 912. If the water needs to flow through the functional assembly 93, the water in the second flow channel 97 after passing through the first filter assembly 94 enters the containment housing 931 through the inlet of the containment housing 931, flows through the functional material 932 in the containment housing 931, and then flows out of the containment housing 931 through the outlet of the containment housing 931 and out of the second outlet 913.

[0113] Specifically, the end of the first filter assembly 94 near the functional assembly 93 includes a lower end cap 942, which is used to seal the lower end surface of the first filter assembly 94 and the lower end of the space within the first filter assembly 94. This prevents water passing through the first filter assembly 94 from flowing out of the lower end of the first filter assembly 94, which could cause water leakage. The functional assembly 93 is disposed in the accommodation space formed by the first filter assembly 94 and the lower end cap 942.

[0114] The upper end of the housing 91 is formed with a first raised ring 9101 and a second raised ring 9102 extending in the axial direction of the housing 91. The second raised ring 9102 is located within the first raised ring 9101. The outlet of the functional component 93 is inserted into and sealed with the second raised ring 9102. The interior of the second raised ring 9102 is connected to the second outlet 913. The upper end of the first filter assembly 94 has an upper end cap 941 for sealing the end of the first filter assembly 94. The upper end cap 941 includes an upper end cap body 9411 extending in the radial direction of the first filter assembly 94 and an insert 9412 extending in the axial direction of the first filter assembly 94. The upper end cap 941 may also include an upper end cap extension extending in the axial direction of the first filter assembly 94 and an upper end cap inner extension extending in the axial direction of the first filter assembly 94. The first filter assembly 94 is located between the upper end cap outer and inner extensions.

[0115] The functional assembly 93 passes through the upper end cap body 9411, the insert portion 9412, and the inner extension of the upper end cap. A gap is defined between the insert portion 9412 and the outer wall of the functional assembly 93. The insert portion 9412 is inserted and sealed with the first raised ring 9101, forming a second annulus 9104 between the first raised ring 9101 and the second raised ring 9102. The second flow channel 97 communicates with the second annulus 9104 through the gap between the insert portion 9412 and the outer wall of the functional assembly 93. A first annulus 9103 is formed between the first raised ring 9101 or the insert portion 9412 and the inner wall of the housing 91. The first annulus 9103 communicates with the first inlet 911, and the second annulus 9104 communicates with the first outlet 912.

[0116] Alternatively, the water purification system may have a first state. In the first state, the drive pump 5 is turned on, allowing the purified water output from the purified water outlet of the second filter assembly 2 to flow through the functional component 93 and the return water channel 4 and then back to the second filter assembly 2. In the first state, the purified water output channel 3 of the water purification system is in a non-discharging state, that is, no purified water is supplied to the user.

[0117] In the first state, as a feasible option, the purified water output from the purified water outlet of the second filter assembly 2 can enter the functional assembly 93. In the first state, as a feasible option, when the water purification system includes a first filter assembly 94, the purified water output from the purified water outlet of the second filter assembly 2 can enter the functional assembly 93 after passing through the first filter assembly 94, or can enter the functional assembly 93 directly without passing through the first filter assembly 94. In the first state, the purified water output from the purified water outlet of the second filter assembly 2 is imbued with functional components when passing through the functional assembly 93. The purified water with functional components flows back into the second filter assembly 2. For example, when the functional material 932 includes a scale inhibitor, the purified water with the scale inhibitor can remain in the second filter assembly 2, thereby reducing the possibility of scaling in the second filter assembly 2. For another example, when the functional material 932 includes an antibacterial material, the purified water with the antibacterial component can remain in the second filter assembly 2, effectively reducing the degree of bacterial growth in the second filter assembly 2 when the water purification system is not used for a long time.

[0118] In this embodiment, waste water may not be discharged when the water passes through the second filter assembly 2 for filtration.

[0119] In other feasible embodiments, when wastewater needs to be discharged after filtering water through the second filter assembly 2, the water purification system may include a wastewater discharge waterway 6, which is connected to the wastewater outlet of the second filter assembly 2. A control assembly 7 having a wastewater ratio function may be provided on the wastewater discharge waterway 6. Furthermore, the control assembly 7 may also have an on / off function. When the control assembly 7 is in the wastewater ratio function, the control assembly 7 is also in the on state.

[0120] As feasible, Figure 3 FIG. 1 is a schematic structural diagram of a water purification system in a third embodiment of the present utility model. Figure 3 As shown, the water inlet circuit 1 may include a water-holding chamber assembly 13, which may be located on the circulating water circuit. Furthermore, the chamber assembly 13 may be located on the water inlet circuit 1. The amount of water held in the chamber assembly 13 may be greater than or equal to the amount of water held in the second filter assembly 2. Thus, the water held in the chamber assembly 13 is sufficient to replace the water held in the second filter assembly 2.

[0121] In this embodiment, the water purification system can have a first state. In the first state, the driving pump 5 is in an open state, and the clean water output from the clean water outlet of the second filter component 2 passes through the functional component 93 and the return water channel 4 and then flows back to the accommodating chamber component 13, so that the accommodating chamber component 13 stores water with functional components. In the first state, in one way, the control component 7 can be in a disconnected state. In another way, the water purification system may include: an inlet valve 8 provided on the inlet water channel 1, and the return water channel 4 is connected to the inlet water channel 1 downstream of the inlet valve 8. In the first state, the control component 7 is in a wastewater ratio function, and the inlet valve 8 is in an open state. At this time, while the water passes through the second filter component 2 to produce clean water, the wastewater generated is discharged through the wastewater discharge water channel 6. Therefore, the raw water of the water source needs to be added to the circulating water channel through the inlet valve 8 to ensure that there is enough water in the circulating water channel to produce circulation. In this mode, the raw water from the water source is mixed with the purified water with functional components after passing through the functional component 93 and the return water channel 4 and then flows back into the accommodating chamber component 13, so that the accommodating chamber component 13 stores water with functional components. In another mode, Figure 4 FIG. 1 is a schematic structural diagram of a water purification system in a fourth embodiment of the present utility model. Figure 4As shown, the water purification system may include a first waterway 10, one end of which is connected to the wastewater outlet of the second filter assembly 2, and the other end of which is connected to the inlet of the second filter assembly 2 or the water inlet channel 1. In a first state, the first waterway 10 is connected, and wastewater output from the wastewater outlet of the second filter assembly 2 flows back to the inlet of the second filter assembly 2 through the first waterway 10, or flows back to the inlet of the accommodating chamber assembly 13 through the first waterway 10 and the water inlet channel 1. In this state, the control assembly 7 may be in a disconnected state. When wastewater output from the wastewater outlet of the second filter assembly 2 flows back to the inlet of the second filter assembly 2 through the first waterway 10, the purified water containing the functional components after passing through the functional assembly 93 and the return waterway 4 flows back to the accommodating chamber assembly 13, so that the accommodating chamber assembly 13 stores the purified water containing the functional components. The wastewater output from the wastewater outlet of the second filter assembly 2 flows back to the second filter assembly 2 through the first waterway 10. When the wastewater output from the wastewater outlet of the second filter component 2 flows back to the inlet of the accommodating chamber component 13 through the first waterway 10 and the water inlet waterway 1, the clean water with functional components after passing through the functional component 93 and the return waterway 4 is mixed with the wastewater output from the wastewater outlet of the second filter component 2 and flows back to the accommodating chamber component 13, so that the accommodating chamber component 13 stores water with functional components.

[0122] As a feasible method, the water purification system may include: an inlet valve 8 provided on the inlet waterway 1. The inlet valve 8 is used to control the connection and disconnection between the inlet waterway 1 and the water source. The return waterway 4 may be connected to the inlet waterway 1 downstream of the inlet valve 8.

[0123] When the water purification system includes a first one-way conducting component 92, in all the above-mentioned first states, since the driving pump 5 is in the on state, the pressure inside the functional component 93 is lower than the pressure inside the first filter component 94 or the pressure at the purified water outlet of the second filter component 2, causing the first one-way conducting component 92 to be opened. Therefore, the first one-way conducting component 92 is in a connected state.

[0124] Furthermore, the water purification system can have a second state. In one embodiment, in the second state, the water inlet valve 8 is open and the control assembly 7 is connected, allowing raw water from the water source to flow into the water inlet channel 1 and the water containing the functional component in the accommodating chamber assembly 13 to flow into the second filter assembly 2, thereby replacing the raw water or wastewater in the second filter assembly 2 with the water containing the functional component. Wastewater generated at the wastewater outlet of the second filter assembly 2 is discharged through the wastewater discharge channel 6. To ensure that the raw water or wastewater in the second filter assembly 2 is replaced with the water containing the functional component, this can be achieved by controlling the opening time of the water inlet valve 8. Alternatively, in this embodiment, in the second state, the control assembly 7 can be in the wastewater ratio function, and the cleaned water output from the cleaned water outlet of the second filter assembly 2 can flow back through the return water channel 4. The raw water from the water source and the cleaned water flowing back through the return water channel 4 are mixed and then input into the accommodating chamber assembly 13, thereby replacing the water containing the functional component in the accommodating chamber assembly 13 and flowing into the second filter assembly 2.

[0125] In another embodiment, when one end of the first waterway 10 is connected to the wastewater outlet of the second filter assembly 2, the drive pump 5 is located on the water inlet waterway 1, and the other end of the first waterway 10 is connected to the inlet of the accommodating chamber assembly 13 and is connected upstream of the drive pump 5, in the second state, the drive pump 5 is in operation, the first waterway 10 is in a connected state, and the wastewater discharged from the wastewater outlet of the second filter assembly 2 enters the inlet of the accommodating chamber assembly 13 through the first waterway 10. The water with functional components in the accommodating chamber assembly 13 flows into the inlet of the second filter assembly 2, thereby replacing the raw water in the second filter assembly 2 with water with functional components. As a feasible embodiment, in the second state, the control assembly 7 can be in a disconnected state, and the clean water output from the clean water outlet of the second filter assembly 2 flows back through the return waterway 4.

[0126] In all the above embodiments, the second state of the water purification system is performed after the first state, so that water with functional components is stored in the accommodating chamber assembly 13 after the first state.

[0127] As a feasible approach, in order to control whether the wastewater generated by the wastewater outlet of the second filter assembly 2 flows back through the first waterway 10, or to control the wastewater generated by the wastewater outlet of the second filter assembly 2 to flow back only at a very small flow rate, the first waterway 10 may be provided with an on-off valve 14 or a small hole structure 15. When the on-off valve 14 is provided on the first waterway 10, in a first state, the on-off valve 14 may be in an open state to prevent the water containing functional ingredients stored in the accommodating chamber assembly 13 from being mixed with the wastewater. When the small hole structure 15 is provided on the first waterway 10, in the first state, since the wastewater generated by the wastewater outlet of the second filter assembly 2 flows back only at a very small flow rate, it will not significantly affect the water containing functional ingredients stored in the accommodating chamber assembly 13.

[0128] In all of the above embodiments, the accommodating chamber assembly 13 and the second filter assembly 2 can be formed in the same filter element or as separate components. When the accommodating chamber assembly 13 and the second filter assembly 2 are formed in the same filter element, to facilitate connection of the other end of the first waterway 10 and avoid complicating the waterway within the filter element formed by the accommodating chamber assembly 13 and the second filter assembly 2, the other end of the first waterway 10 can be connected to the water inlet waterway 1 upstream of the inlet of the accommodating chamber assembly 13.

[0129] When the accommodating chamber assembly 13 and the second filter assembly 2 are independent components, preferably, the other end of the first waterway 10 is connected between the inlet of the second filter assembly 2 and the outlet of the accommodating chamber assembly 13, thereby preventing the wastewater discharged from the wastewater outlet of the second filter assembly 2 from entering the accommodating chamber assembly 13 through the first waterway 10 in the first state.

[0130] In order to prevent the raw water flowing into the water inlet channel 1 from being discharged directly through the first water channel 10 and the wastewater discharge channel 6, it is feasible that a second one-way conducting component 11 can be provided on the first water channel 10. The second one-way conducting component 11 allows the wastewater outlet of the second filter component 2 to be conducted toward the inlet of the second filter component 2 or the water inlet channel 1.

[0131] As a feasible method, a third one-way conducting component 12 can be provided on the return waterway 4. The third one-way conducting component 12 enables the clean water outlet or the clean water output waterway 3 of the second filter component 2 to be conducted toward the inlet or the water inlet waterway 1 of the second filter component 2, thereby preventing the raw water flowing into the water inlet waterway 1 from directly flowing into the functional component 93 through the return waterway 4.

[0132] In all of the above embodiments, the accommodating chamber assembly 13 can, as a feasible option, include at least a pre-filter assembly. The filter material of the pre-filter assembly itself can accommodate a certain amount of water, and the pre-filter assembly can be used as the accommodating chamber assembly 13. In this embodiment, the accommodating chamber assembly 13 needs to be located upstream of the second filter assembly 2. Of course, in other feasible embodiments, the accommodating chamber assembly 13 only needs to have a cavity for accommodating water. For example, when the accommodating chamber assembly 13 and the second filter assembly 2 can be formed in the same filter element, the pre-filter assembly can be mounted outside the second filter assembly 2.

[0133] In the water purification system of the present application, when the water is being produced, raw water input from the water inlet waterway 1 flows into the second filter assembly 2. The purified water outputted from the purified water outlet of the second filter assembly 2 flows into the first inlet 911 of the composite filter element 9. The purified water is filtered by the first filter assembly 94 in the composite filter element 9, then flows out of the composite filter element 9 from the first outlet 912, and finally outputted from the purified water output waterway 3. Therefore, during the entire water production state, the purified water outputted from the purified water output waterway 3 can completely avoid passing through the functional component 93. This not only effectively reduces the consumption of the functional component 93, but also reduces the water resistance of the entire water purification system, thereby ensuring the purified water outlet flow rate of the water purification system. When it is necessary to release the functional components in the functional component 93 into the water and allow the water with the functional components to flow into the second filter component 2 so as to perform corresponding treatment on the second filter component 2 using the functional components, the water purification system can execute the first state, by starting the driving pump 5 to output the clean water from the clean water outlet of the second filter component 2 to flow into the first inlet 911 of the composite filter element 9, and the clean water passes through the functional component 93 in the composite filter element 9 so that the clean water has the functional components, and then the clean water with the functional components flows out of the composite filter element 9 from the second outlet 913 and flows back to the accommodating chamber component 13 through the return water path 4. Then, by executing the second state, the water with the functional components stored in the accommodating chamber component 13 is driven into the second filter component 2 to replace the raw water or wastewater in the second filter component 2 with the water with the functional components stored in the accommodating chamber component 13, so that the second filter component 2 can be treated accordingly by the functional components. In the present application, when there is no need to use functional components to perform corresponding processing on the second filter component 2, the clean water output by the water purification system in the water production state will not pass through the functional component 93 at all, and the functional components released by the functional component 93 will not have any impact on the output clean water. Only when the water purification system needs to use functional components to perform corresponding processing on the second filter component 2, the water purification system can execute the first state and the second state to return the functional components released by the functional component 93 to the second filter component 2 using clean water.

[0134] In addition, by executing the first state and the second state of the water purification system, the raw water in the second filter component 2 can be replaced with water that is mostly purified water, and the TDS value of this water is relatively low. When the water purification system is not used for a long time, since the second filter component 2 stores mostly purified water, even if this part of water slowly penetrates the filter membrane in the second filter component 2 to the purified water side of the filter membrane, the TDS of the first cup of water output when the water purification system is used for the first time after being left unused for a long time will not increase significantly, which helps to improve the user experience.

[0135] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "essentially consisting of..." describing a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps herein also contemplates an embodiment that is essentially composed of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any attribute described that "may" include is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0136] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to in detail. The above embodiments are only for illustrating the technical concept and features of the utility model. Their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They are not intended to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A water purification system, characterized in that: The water purification system comprises: water inlet waterway; a second filter assembly, wherein the inlet of the second filter assembly is connected to the outlet of the water inlet waterway; a purified water output waterway, the inlet of which is in communication with the purified water outlet of the second filter assembly; a functional component capable of releasing functional ingredients into the water flowing therethrough, wherein the inlet of the functional component is in communication with the purified water outlet of the second filter component; a return water channel, one end of which is connected to the outlet of the functional component, and the other end of which is connected to the inlet of the second filter component or the water inlet channel; the return water channel, the second filter component and the functional component can form a circulating water channel; A driving pump is provided on the circulating water path.

2. The water purification system according to claim 1, characterized in that: The water purification system further comprises: The first filter component, the water inlet side of the first filter component is connected to the clean water outlet of the second filter component; the inlet of the functional component is connected to the clean water outlet of the second filter component or the water outlet side of the first filter component.

3. The water purification system according to claim 2, characterized in that: The first filter component and the functional component form a composite filter element, and the composite filter element includes: a housing having a first inlet, a first outlet, and a second outlet; The functional component and the first filter component are arranged in the shell, the first inlet is connected to the water inlet side of the first filter component, the first outlet is connected to the water outlet side of the first filter component, the second outlet is connected to the outlet of the functional component, and the inlet of the functional component is connected to the first inlet and / or the water outlet side of the first filter component.

4. The water purification system according to claim 3, characterized in that: The composite filter element further includes: a first one-way conducting component disposed in the housing, wherein the first one-way conducting component allows the first inlet and / or the water outlet side of the first filter component to be conducted toward the inlet of the functional component.

5. The water purification system according to claim 3, characterized in that: The functional component and the first filter component are arranged along the axial direction of the composite filter element.

6. The water purification system according to claim 5, characterized in that: The composite filter element further includes: a guide tube arranged in the shell, the first filter component is sleeved outside the guide tube, one end of the guide tube is connected to the outlet of the functional component, and the other end of the guide tube is connected to the second outlet.

7. The water purification system according to claim 6, characterized in that: A first flow channel is formed between the outer wall of the first filter assembly and the outer shell, and a second flow channel is formed between the inner wall of the first filter assembly and the outer wall of the flow guide tube; The functional component includes a containing shell and a functional material arranged in the containing shell; a third flow channel is formed between the outer side wall of the containing shell and the inner side wall of the outer shell; one end of the flow guide tube is connected to the outlet of the containing shell; one end of the third flow channel is connected to the inlet of the containing shell; and the other end of the third flow channel is connected to the second flow channel or the first flow channel.

8. The water purification system according to claim 7, characterized in that: A first raised ring and a second raised ring extending in the axial direction of the shell are formed at one end of the interior of the shell away from the functional component. The second raised ring is located inside the first raised ring, and a first annulus is formed between the first raised ring and the inner side wall of the shell. The guide tube is inserted into the second raised ring and maintained sealed, and the interior of the second raised ring is communicated with the second outlet. The first filter assembly has an upper end cap at one end away from the functional component for sealing the end of the first filter assembly. The upper end cap includes an upper end cap body extending in the radial direction of the first filter assembly and an insert portion extending in the axial direction of the first filter assembly. The guide tube passes through the upper end cap body and the insert portion. A gap is formed between the insert portion and the outer side wall of the guide tube. The insert portion is inserted into the first raised ring and maintained sealed, and a second annulus is formed between the first raised ring and the second raised ring. The second flow channel is communicated with the second annulus through the gap between the insert portion and the outer side wall of the guide tube. The first annulus, the second annulus, the first inlet and the first outlet are communicated one-to-one.

9. The water purification system according to claim 7, characterized in that: The outer side wall of the first filter assembly is the water inlet side of the first filter assembly, and the first flow channel is connected to the first inlet; the inner side wall of the first filter assembly is the water outlet side of the first filter assembly, and the second flow channel is connected to the first outlet.

10. The water purification system according to claim 7, characterized in that: The inner side wall of the first filter assembly is the water inlet side of the first filter assembly, and the first flow channel is connected to the first outlet; the outer side wall of the first filter assembly is the water outlet side of the first filter assembly, and the second flow channel is connected to the first inlet.

11. The water purification system according to claim 9, characterized in that: When the other end of the third flow channel is connected to the second flow channel, the first filter component has a lower end cover at one end close to the functional component, and a seal is provided between the lower end cover and the outer shell; a connecting flow channel is provided between the lower end cover and the accommodating shell, and the connecting flow channel connects the third flow channel and the second flow channel.

12. The water purification system according to claim 11, characterized in that: The lower end cover is used to seal the lower end surface of the first filter assembly, and the lower end cover includes a lower end cover body extending in the radial direction of the first filter assembly, a lower end cover outer extension extending in the axial direction of the first filter assembly, and a lower end cover inner extension extending in the axial direction of the first filter assembly; the first filter assembly is located between the lower end cover outer extension and the lower end cover inner extension; the sealing member is provided between the lower end cover outer extension and the outer shell, and a gap is provided between the lower end cover inner extension and the outer side wall of the guide tube, and a protrusion is provided between the lower end cover body and the accommodating shell so that a gap is provided between the lower end cover body and the accommodating shell, thereby forming the connecting flow channel; the second flow channel is connected to the third flow channel through the gap between the lower end cover inner extension and the outer side wall of the guide tube.

13. The water purification system according to claim 9, characterized in that: When the other end of the third flow channel is connected to the first flow channel, the first filter component has a lower end cover at one end close to the functional component, and the lower end cover is sealed with the guide tube and / or the accommodating shell.

14. The water purification system according to claim 7, characterized in that: The composite filter element also includes: a first one-way conductive component arranged in the outer shell, a recessed installation space is formed on the accommodating shell, the first one-way conductive component is installed in the installation space, an inlet is formed on the accommodating shell corresponding to the installation space, and the outlet of the first one-way conductive component is connected to the inlet of the accommodating shell.

15. The water purification system according to claim 7, characterized in that: The composite filter element further comprises: a first one-way conducting component disposed in the housing, the first one-way conducting component allowing the first inlet and / or the water outlet side of the first filter assembly to be conducted toward the inlet of the functional assembly; The first one-way conductive component is located at one end of the functional component away from the first filter component, and the first one-way conductive component extends along the radial direction of the composite filter element so that the outlet of the first one-way conductive component and the inlet of the accommodating shell are located near the middle of the accommodating shell.

16. The water purification system according to claim 3, characterized in that: The functional components and the first filter component are arranged along the radial direction of the composite filter element.

17. The water purification system according to claim 16, characterized in that: The first filter assembly is sleeved outside the functional assembly, a first flow channel is formed between the outer wall of the first filter assembly and the outer shell, and a second flow channel is formed between the inner wall of the first filter assembly and the outer wall of the functional assembly; The outer side wall of the first filter component is the water inlet side of the first filter component, and the first flow channel is connected to the first inlet; the inner side wall of the first filter component is the water outlet side of the first filter component, and the second flow channel is connected to the first outlet; the second flow channel is connected to the inlet of the functional component.

18. The water purification system according to claim 17, characterized in that: The first filter component has a lower end cover at one end close to the functional component, and the lower end cover is used to seal the lower end surface of the first filter component and the lower end of the space inside the first filter component; the functional component is arranged in the accommodating space formed by the first filter component and the lower end cover.

19. The water purification system according to claim 17, characterized in that: The upper end of the inner part of the shell is formed with a first raised ring and a second raised ring extending in the axial direction of the shell, and the second raised ring is located inside the first raised ring; the outlet of the functional component is inserted into the second raised ring and maintained sealed, and the interior of the second raised ring is connected to the second outlet; the upper end of the first filter assembly has an upper end cover for sealing the end of the first filter assembly; the upper end cover includes an upper end cover body extending in the radial direction of the first filter assembly and an insert portion extending in the axial direction of the first filter assembly, the functional component passes through the upper end cover body and the insert portion, and there is a gap between the insert portion and the outer wall of the functional component, the insert portion is inserted into the first raised ring and maintained sealed, and a second annulus is formed between the first raised ring and the second raised ring; the second flow channel is connected to the second annulus through the gap between the insert portion and the outer wall of the functional component; a first annulus is formed between the first raised ring or the insert portion and the inner side wall of the shell, the first annulus is connected to the first inlet, and the second annulus is connected to the first outlet.

20. The water purification system according to claim 1, characterized in that The functional material in the functional component includes at least one of the following: scale-inhibiting material, bactericidal material, and bacteriostatic material.

21. The water purification system according to claim 2, characterized in that: The first filter assembly includes a post-filter assembly.

22. The water purification system according to claim 1, characterized in that The water purification system has a first state. In the first state, the driving pump is in an open state, so that the purified water output from the purified water outlet of the second filter component passes through the functional component and the return water channel and then flows back to the second filter component.

23. The water purification system according to claim 1, characterized in that The water purification system further comprises: a wastewater discharge waterway, the wastewater discharge waterway being in communication with the wastewater outlet of the second filter assembly, the wastewater discharge waterway being provided with a control assembly having an on-off function and a wastewater ratio function; The water inlet waterway is provided with a accommodating chamber component capable of accommodating water, and the accommodating chamber component is located on the circulating waterway.

24. The water purification system according to claim 23, characterized in that The water purification system has a first state. In the first state, the driving pump is in an on state, and the clean water output from the clean water outlet of the second filter component passes through the functional component and the return water channel and then flows back to the accommodating chamber component, so that the accommodating chamber component stores water with functional components.

25. The water purification system according to claim 24, characterized in that In the first state, the control component is in a disconnected state; or, The water purification system further comprises: an inlet valve provided on the inlet waterway, the return waterway being connected to the inlet waterway downstream of the inlet valve, and in the first state, the control component is in a wastewater ratio function, and the inlet valve is in an open state; or, The water purification system also includes: a first water channel, one end of the first water channel is connected to the wastewater outlet of the second filter component, and the other end of the first water channel is connected to the inlet of the second filter component or the water inlet channel. In the first state, the first water channel is in a connected state, and the wastewater output from the wastewater outlet of the second filter component flows back to the inlet of the second filter component through the first water channel or flows back to the inlet of the accommodating chamber component through the first water channel and the water inlet channel.

26. The water purification system according to claim 24, characterized in that The water purification system further comprises: an inlet valve provided on the inlet waterway, the return waterway being connected to the inlet waterway downstream of the inlet valve; The water purification system has a second state. In the second state, the water inlet valve is in an open state, the control component is in a connected state, raw water flows into the water inlet waterway, and the water with functional ingredients in the accommodating chamber component flows into the second filter component, so that the raw water in the second filter component is replaced by water with functional ingredients, and the wastewater generated by the wastewater outlet of the second filter component is discharged through the wastewater discharge waterway.

27. The water purification system according to claim 24, characterized in that The water purification system further includes: a first waterway, one end of the first waterway being connected to the wastewater outlet of the second filter assembly, the drive pump being located on the water inlet waterway, and the other end of the first waterway being connected to the inlet of the accommodating chamber assembly and connected upstream of the drive pump; The water purification system has a second state. In the second state, the driving pump is in an operating state, the first water channel is in a connected state, the wastewater discharged from the wastewater outlet of the second filter component enters the inlet of the accommodating chamber component through the first water channel, and the water with functional ingredients in the accommodating chamber component flows into the inlet of the second filter component, so that the raw water in the second filter component is replaced by water with functional ingredients.

28. The water purification system according to claim 26, characterized in that In the second state, the control component is in the wastewater ratio function, and the clean water output from the clean water outlet of the second filter component flows back through the return water channel.

29. The water purification system according to claim 27, characterized in that In the second state, the control component is in a disconnected state, and the clean water output from the clean water outlet of the second filter component flows back through the return water path.

30. The water purification system according to any one of claims 26 to 28, characterized in that The second state of the water purification system is performed after the first state.

31. The water purification system according to claim 25 or 27, characterized in that: The accommodating chamber assembly and the second filter assembly are formed in the same filter element, and the other end of the first waterway is connected to the water inlet waterway upstream of the inlet of the accommodating chamber assembly.

32. The water purification system according to claim 25, characterized in that When the accommodating chamber assembly and the second filter assembly are independent components, the other end of the first waterway is connected between the inlet of the second filter assembly and the outlet of the accommodating chamber assembly.

33. The water purification system according to claim 25 or 27, characterized in that: A second one-way conducting component is provided on the first waterway, and the second one-way conducting component allows the wastewater outlet of the second filter assembly to be conducted toward the inlet of the second filter assembly or the water inlet waterway.

34. The water purification system according to claim 21, characterized in that A third one-way conducting component is provided on the return waterway, and the third one-way conducting component enables the purified water outlet of the second filter assembly or the purified water output waterway to be conducted toward the inlet of the second filter assembly or the water inlet waterway.

35. The water purification system according to claim 23, characterized in that The accommodating chamber assembly at least includes: a pre-filter assembly.

36. The water purification system according to claim 23, characterized in that The second filter assembly includes at least one of the following: a reverse osmosis membrane filter assembly, a nanofiltration membrane filter assembly, and an ultrafiltration membrane filter assembly.

37. The water purification system according to claim 2, characterized in that The water purification system further comprises: a first one-way conducting component, wherein the first one-way conducting component connects the purified water outlet of the second filter assembly and / or the water outlet side of the first filter assembly to the inlet of the functional assembly; The water purification system has a water production state. In the water production state, raw water input from the water inlet waterway flows into the second filter component, the purified water outlet of the second filter component outputs purified water and is output from the purified water output waterway, and the first one-way conductive component is in a disconnected state.

38. The water purification system according to claim 22 or 24, characterized in that: The water purification system further comprises: a first filter assembly, wherein the water inlet side of the first filter assembly is in communication with the purified water outlet of the second filter assembly; and the inlet of the functional assembly is in communication with the purified water outlet of the second filter assembly or the water outlet side of the first filter assembly; The water purification system further includes: a first one-way conducting component, wherein the first one-way conducting component connects the purified water outlet of the second filter assembly and / or the water outlet side of the first filter assembly to the inlet of the functional assembly; In the first state, the first one-way conductive component is in a connected state.

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