Water purification system

Abstract

The present disclosure relates to a water purification system, which includes: a pre-water drive composite filter pump integrated with a pre-filter element and a water drive tank; a wastewater pipeline, one end of the water storage pipeline is connected to the pure water outlet, the other end of the water storage pipeline is connected to the pre-core and the reverse osmosis filter element, a water inlet pipeline, a clean water pipeline, a first solenoid valve and a water storage port of a pressurized water drive composite filter element are arranged on the clean water pipeline, a high-pressure switch and a first switch are arranged on the water storage pipeline, a reflux pipeline is connected to the water storage port and the clean water inlet of the reverse osmosis filter element, and a second solenoid valve and a reflux check valve are arranged on the reflux pipeline; one end of the cold water pipeline is a cold water interface of the water purification system, the other end of the cold water pipeline is connected to the pure water outlet of the reverse osmosis filter element, and a second switch is arranged on the cold water pipeline, and the second switch is used to control the reverse osmosis filter element to produce pure water and flow to the cold water interface. This technical solution can avoid the occurrence of a high TDS of the first cup of water, improve the user's water experience, and reduce the overall volume of the water purification system.

Description

Technical Field

[0001] The present disclosure relates to the field of water purification technology, and in particular to a water purification system. Background Art

[0002] As people's living standards improve, they pay more and more attention to water quality and hygiene, and it has become a trend to equip families with water purification systems. If the water purification system is not used for a long time, the ions in front of the RO membrane in the RO (Reverse Osmosis) filter element in the water purification system will pass through the RO membrane and penetrate into the pure water end, resulting in a higher TDS (Total dissolved solids) in the first glass of water, affecting the user experience.

[0003] In order to solve the above problems, pure water bubble membrane technology can be used in the existing technology to separately set up a water tank and a water drive tank in the water purification system. However, the separate water tank and water drive tank will occupy the internal space of the water purification system, resulting in a large overall volume of the water purification system and affecting the installation of other home appliances in the sink cabinet. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the embodiment of the present disclosure provides a water purification system. The technical solution is as follows:

[0005] According to one aspect of an embodiment of the present disclosure, a water purification system is provided, comprising a pre-water drive composite filter element and a reverse osmosis filter element integrated with a pre-filter element and a water drive tank, and the water purification system further comprises:

[0006] A water inlet pipeline, one end of which is a tap water interface, and the other end of which is connected to the tap water inlet of the front water drive composite filter element;

[0007] A clean water pipeline, connecting the clean water outlet of the front water drive composite filter element and the clean water inlet of the reverse osmosis filter element, wherein a first solenoid valve and a booster pump are arranged on the clean water pipeline;

[0008] A wastewater pipeline, one end of which is a wastewater interface of the water purification system, and the other end of which is connected to a wastewater outlet of the reverse osmosis filter element;

[0009] A water storage pipeline, one end of which is connected to the pure water outlet, and the other end of which is connected to the water storage port of the pre-water drive composite filter element, and a high-pressure switch and a first switch are provided on the water storage pipeline, and the first switch is used to limit the pure water in the water storage pipeline to flow from the pure water outlet to the water storage port;

[0010] A reflux pipeline is connected to the water storage port of the front water drive composite filter element and the purified water inlet of the reverse osmosis filter element, and a second solenoid valve and a reflux check valve are arranged on the reflux pipeline;

[0011] A cold water pipeline, one end of which is the cold water interface of the water purification system, and the other end of which is connected to the pure water outlet of the reverse osmosis filter element. A second switch is provided on the cold water pipeline, and the second switch is used to control the reverse osmosis filter element to produce pure water to flow to the cold water interface.

[0012] In one embodiment, the water storage port comprises an opening;

[0013] Alternatively, the water storage port includes: two openings: a water storage inlet and a water storage outlet. Accordingly, the other end of the water storage pipeline is connected to the water storage inlet in the water storage port, and the return pipeline is connected to the water storage outlet in the water storage port.

[0014] In one embodiment, the other end of the cold water pipeline is connected to the pure water outlet of the reverse osmosis filter element and includes:

[0015] The other end of the cold water pipeline is connected to the water storage outlet, and is connected to the pure water outlet through the water drive tank and the water storage pipeline.

[0016] In one embodiment, the water purification system further comprises:

[0017] A hot water pipeline, one end of which is the hot water interface of the water purification system, and the other end of which is connected to the pure water outlet or connected between the second solenoid valve and the water storage port on the reflux pipeline. A third solenoid valve, a first pressure-stabilizing valve, a water pump and an instant heating device are provided on the hot water pipeline. The water pump is located between the first pressure-stabilizing valve and the instant heating device, and the instant heating device is located between the water pump and the hot water outlet.

[0018] In one embodiment, the first switch comprises one of a check valve and a solenoid valve.

[0019] In one embodiment, the second switch comprises one of a high voltage switch or a solenoid valve.

[0020] In one embodiment, one end of the reflux pipeline is connected to the water storage port, and the other end of the reflux pipeline is connected to the pipeline between the first solenoid valve and the boost pump, or the other end of the reflux pipeline is connected to the pipeline between the boost pump and the clean water inlet of the reverse osmosis filter element.

[0021] In one embodiment, a second pressure-stabilizing valve is provided on the water inlet pipeline.

[0022] In one embodiment, the pre-water drive composite filter element comprises:

[0023] A composite filter element housing, wherein the composite filter element housing is provided with a tap water inlet, a purified water outlet, and a water storage outlet;

[0024] The pre-filter element comprises a pre-filter element housing and a first pre-filter element main body, wherein the pre-filter element housing is fixed in the composite filter element housing, and comprises an upper end cover, a lower end cover and a guide shell, the upper end cover is a hollow annular cover body, the lower end cover is a plate-type cover body, the guide shell is an internally hollow cylindrical shell, the upper end of the guide shell is connected to the upper end cover so that the internal hollow is connected to the hollow of the annular cover body, the lower end of the guide shell is connected to the lower end cover, the pre-filter element housing forms an external annular cavity located outside the guide shell and an internal cylindrical cavity located inside the guide shell, the external annular cavity is connected to the tap water inlet, and the guide shell is provided with a water hole; the first pre-filter element main body is located in the external annular cavity;

[0025] The water drive tank is located in the internal cylindrical cavity, and includes a water drive tank end cover and a water drive tank water bag fixedly connected to the water drive tank end cover. The water drive tank end cover is connected to the inlet and outlet of the water drive tank water bag and the water storage port, and the clean water cavity between the water drive tank and the pre-filter housing is connected to the clean water outlet.

[0026] In one embodiment, the pre-filter housing further comprises: an annular plate with a hollow interior, the annular plate being fixed inside the guide housing;

[0027] The pre-filter element further comprises a second pre-filter element body, and the second pre-filter element body is located in the inner cylindrical cavity between the annular plate and the lower cover plate;

[0028] Wherein, the water through hole is located on the guide shell between the annular plate and the lower cover plate, and the water drive tank is located in the internal cylindrical cavity between the annular plate and the upper end cover.

[0029] In one embodiment, the front water drive composite filter element is also integrated with a rear filter element, wherein:

[0030] The post-filter element comprises a post-filter element housing and a post-filter element main body; the post-filter element housing is located in the water drive tank, and comprises a post-upper end cover and a post-lower end cover, the post-upper end cover is a hollow annular cover body, which is fixedly connected to the composite filter element housing, and the post-lower end cover is a plate-type cover body; the post-filter element main body is an annular cylinder, which is located in the post-filter element housing, and the bag opening of the water bag of the water drive tank is connected to the water storage port through the post-filter element main body.

[0031] In one embodiment, a post-filter element is integrated in the reverse osmosis filter element.

[0032] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0033] The water purification system provided in the present embodiment can replace the concentrated water in front of the RO membrane with the pure water stored in the water drive tank when the water purification system does not produce water for a period of time, so as to prevent the concentrated water ions in front of the RO membrane from passing through the RO membrane and penetrating into the pure water end, thereby avoiding the situation where the TDS of the first cup of water is high, and improving the user's water use experience; and the water purification system adopts the method of integrating the water drive tank and the pre-filter element to form a pre-composite filter element, so as to solve the problem of increasing the volume of the pure water bubble membrane and water demand of the water purification system by setting a separate water drive tank.

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0036] Figure 1 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0037] Figure 2 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0038] Figure 3 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0039] Figure 4 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0040] Figure 5 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0041] Figure 6 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0042] Figure 7 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0043] Figure 8 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0044] Fig. 9 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0045] Fig.10is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0046] Fig.11 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0047] Fig.12 is a schematic structural diagram of a water purification system according to an exemplary embodiment.

[0048] Fig.13 It is a schematic structural diagram of a pre-composite filter element according to an exemplary embodiment.

[0049] Fig.14 It is a schematic structural diagram of a pre-composite filter element according to an exemplary embodiment.

[0050] Fig.15 It is a schematic structural diagram of a pre-composite filter element according to an exemplary embodiment. DETAILED DESCRIPTION

[0051] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0052] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The present invention provides a water purification system. Figure 1 FIG. 1 is a schematic diagram of a water purification system according to an exemplary embodiment. Figure 1As shown, the water purification system includes: a pre-water drive composite filter element 1, a reverse osmosis filter element 2, a water inlet pipeline 3, a clean water pipeline 4, a waste water pipeline 5, a water storage pipeline 6, a return pipeline 7 and a cold water pipeline 8.

[0055] like Figure 1 As shown, one end of the water inlet pipeline 3 is a tap water interface 31, and the other end of the water inlet pipeline 3 is connected to the tap water inlet 111 of the pre-water drive composite filter element 1; the clean water pipeline 4 is connected to the clean water outlet 112 of the pre-water drive composite filter element 1 and the clean water inlet 21 of the reverse osmosis filter element 2, and the clean water pipeline 4 is provided with a first solenoid valve 41 and a booster pump 42; one end of the wastewater pipeline 5 is a wastewater interface 51 of the water purification system, and the other end of the wastewater pipeline 5 is connected to the The wastewater outlet 22 of the reverse osmosis filter element 2 is usually provided with a wastewater solenoid valve 52 on the wastewater pipeline 5; one end of the water storage pipeline 6 is connected to the pure water outlet 23, and the other end of the water storage pipeline 6 is connected to the water storage port 113 of the pre-water drive composite filter element 1, and the water storage pipeline 6 is provided with a high-pressure switch 61 and a first switch 62, and the first switch 62 is used to limit the flow direction of the pure water in the water storage pipeline 6 to flow from the pure water outlet 23 to the water storage port 113. The reflux pipeline 7 connects the water storage port 113 of the pre-water drive composite filter element 1 and the clean water inlet 21 of the reverse osmosis filter element 2, and the reflux pipeline 7 is provided with a second solenoid valve 71 and a reflux check valve 72; one end of the cold water pipeline 8 is the cold water interface 81 of the water purification system, and the other end of the cold water pipeline 8 can be as shown in Figure 1 As shown, the pure water outlet 23 connected to the reverse osmosis filter element 2 is provided with a second switch 82 on the cold water pipeline 8 , and the second switch 82 is used to control the reverse osmosis filter element 2 to produce pure water and flow to the cold water interface 81 .

[0056] It should be noted that, in the above pipelines, when two pipelines are connected to one interface, the two pipelines will share a section of pipeline. For example, Figure 1 As shown, the cold water pipeline 8 and the water storage pipeline 6 share a section of pipeline to connect to the pure water outlet 23, the return pipeline 7 and the water storage pipeline 6 share a section of pipeline to connect to the water storage port 113, and so on.

[0057] When the water purification system is in use, there are three working modes: water production mode, cold water extraction mode and reflux bubble film mode.

[0058] Water production mode: The water purification system can open the first solenoid valve 41 and the booster pump 42, so that after the tap water from the outside enters the water purification system from the tap water interface 31 of the water purification system, it can first enter the pre-water drive composite filter element 1 from the tap water inlet 111 of the pre-water drive composite filter element 1. After the pre-water drive composite filter element 1 filters out large particles of impurities and some colored impurities in the water, the water is output from the clean water outlet 112 of the pre-water drive composite filter element 1, so as to avoid the impurities in the water from damaging the rear first solenoid valve 41, the booster pump 42 and the reverse osmosis filter element 2 and other components, thereby effectively improving the service life of the water purification system. The first solenoid valve 41 is the switch of the clean water inlet 21. After the first solenoid valve 41 and the booster pump 42 are turned on, the clean water filtered by the pre-water drive composite filter element 1 will be pressurized by the booster pump 42 and enter the reverse osmosis filter element 2 through the clean water inlet 21 of the reverse osmosis filter element 2. The pure water generated after the reverse osmosis filter element 2 filters the incoming clean water can flow out from the pure water outlet 23 of the reverse osmosis filter element 2, and flow to the water storage port 113 through the water storage pipeline 6. The water storage port 113 is connected to the water drive tank in the pre-water drive composite filter element 1, so that the pure water can enter the water drive tank in the pre-water drive composite filter element 1 for storage after flowing from the water storage pipeline 6 to the water storage port 113.

[0059] Cold water mode: The water purification system can open the first solenoid valve 41, the booster pump 42 and the second switch 82. After the water purification system starts to produce water according to the working process of the above-mentioned water production mode, since the second switch 82 is turned on, the pure water produced by the reverse osmosis filter element 2 will flow out of the cold water interface 81 from the pure water outlet 23 through the second switch 82. The cold water interface 81 is connected to the cold water outlet of the smart faucet, so that the produced pure water can flow out from the cold water outlet of the smart faucet for users to use. Here, in order to prevent the pure water in the cold water pipeline 8 from flowing back, a check valve can be set in the cold water pipeline 8 or in the pipeline shared by the cold water pipeline 8 and the water storage pipeline 6.

[0060] Reflux bubble film mode: The water purification system can close the first solenoid valve 41, the second switch 82 and the booster pump 42, and open the second solenoid valve 71, which is a reflux switch. After the second solenoid valve 71 is opened, since the second switch 82 is closed and the second solenoid valve 71 is open, the pure water stored in the water drive tank under the action of the water pressure in the water drive tank flows through the second solenoid valve 71 to the clean water inlet 21 of the reverse osmosis filter element 2 under the action of the reflux check valve 72, replacing the high TDS concentrated water after normal water production on the concentrated water side of the RO membrane of the reverse osmosis filter element 2. In this way, when the water purification system does not produce water for a long time, the concentrated water before the RO membrane can be replaced to prevent the concentrated water ions before the RO membrane from penetrating through the RO membrane to the pure water side, avoiding the situation where the first cup of water has a high TDS after the water purification system has been stationary for a period of time, thereby improving the user experience.

[0061] The water purification system provided in the present embodiment can replace the concentrated water in front of the RO membrane with the pure water in the water drive tank when the water purification system does not produce water for a period of time, thereby preventing the concentrated water ions in front of the RO membrane from passing through the RO membrane and penetrating into the pure water end, avoiding the situation where the TDS of the first cup of water is high, and improving the user's water use experience; and the water purification system adopts the method of integrating the water drive tank and the pre-filter into a pre-composite filter element, which solves the problem of increasing the volume of a separate water drive tank when the pure water bubble membrane and water demand of the water purification system are set.

[0062] In one possible embodiment, Figure 2 1 is a schematic diagram of a water purification system according to an exemplary embodiment. Figure 1 As shown, it includes an opening, but can also be as shown Figure 2 As shown, it includes two openings, a water storage inlet 1131 and a water storage outlet 1132. Figure 2 As shown, the other end of the water storage pipeline 6 is connected to the water storage inlet 1131 in the water storage port 113, and the reflux pipeline 7 is connected to the water storage outlet 1132 in the water storage port 113. In this way, in the water production mode, the pure water produced by the reverse osmosis filter element 2 can flow from the water storage pipeline 6 to the water storage inlet 1131, and flow from the water storage inlet 1131 to the water drive tank in the pre-composite filter element 1 for storage. In the reflux bubble film mode, the pure water in the water drive tank can flow from the water storage outlet 1132 to the reflux pipeline 7, and flow to the clean water inlet of the reverse osmosis filter element 2 to achieve pure water bubble film.

[0063] In a possible embodiment, the other end of the cold water pipe 8 can be Figure 1 The pure water outlet 23 directly connected to the reverse osmosis filter element 2 can also be as shown. Figure 2 As shown, the other end of the cold water pipeline 8 is connected to the pure water outlet 23 of the reverse osmosis filter element 2, including: the other end of the cold water pipeline 8 is connected to the water storage outlet 1132, so that the pure water outlet 23 is connected through the water storage pipeline 6 and the water drive tank. Figure 2 Under the connection mode of the cold water pipeline 8 shown, in the cold water taking mode, only the pure water in the water drive tank can flow out from the water storage outlet 1132 and flow to the cold water interface 81 through the cold water pipeline 8.

[0064] In one possible embodiment, Figure 3 FIG. 1 is a schematic diagram of a water purification system according to an exemplary embodiment. Figure 3 As shown, in Figure 1A hot water pipeline 9 is arranged on the basis of the water purification system shown in the figure, one end of the hot water pipeline 9 is the hot water interface 95 of the water purification system, and the other end of the hot water pipeline 9 is connected to the pure water outlet 23. A third solenoid valve 91, a first pressure-stabilizing valve 92, a water pump 93 and an instant heating device 94 are arranged on the hot water pipeline 9, the water pump 93 is located between the first pressure-stabilizing valve 92 and the instant heating device 94, and the instant heating device 94 is located between the water pump 93 and the hot water interface 95.

[0065] Here, the function of the first pressure-stabilizing valve 92 is to stabilize the outlet water pressure after the pressure-stabilizing valve on the hot water pipeline 9, so that the water flow entering the instant heating device 94 can be accurately controlled by the water pump 93, and then the outlet water temperature of the instant heating device 94 can be accurately controlled. Optionally, the first pressure-stabilizing valve 92 can be one of a pressure reducing valve, a constant pressure valve, a zero pressure valve or a negative pressure valve. Here, the zero pressure valve or the negative pressure valve can allow the passing water to flow out in a pressure-free state, the pressure reducing valve can reduce the pressure of the passing water to a certain required pressure, and the constant pressure valve allows the passing water to flow out in a constant pressure state. The zero-pressure valve or negative-pressure valve, the pressure reducing valve and the constant-pressure valve can allow the passing water to flow out at a stable pressure. In this way, the subsequent water pump 93 can extract a specific flow rate by pumping water at a specific power. In this way, the water flow rate entering the instant heating device 94 can be accurately controlled by the water pump 93. The outlet water temperature of the instant heating device 94 is related to its working power and water flow rate. In this way, by controlling the working power of the instant heating device 94 and the water flow rate of the water pump 93, the outlet water temperature of the instant heating device 94 can be accurately controlled.

[0066] Preferably, the first pressure-stabilizing valve 92 can be a negative pressure valve or a zero-pressure valve. The negative pressure generated after the water pump 93 is started will cause the negative pressure valve or the zero-pressure valve to open. After the negative pressure valve or the zero-pressure valve is opened, the water pressure behind the valve is zero. This can allow the pure water produced by the reverse osmosis filter element 2 to flow out of the negative pressure valve or the zero-pressure valve in a pressure-free state. The water outlet flow rate of the water pump 93 will not be affected by the pressure of the pure water flowing out of the reverse osmosis filter element 2, and the water outlet flow rate can be accurately controlled.

[0067] In the hot water taking mode, the water purification system can open the first solenoid valve 41, the booster pump 42, the third solenoid valve 91, the water pump 93, the first pressure-stabilizing valve 92 and the instant heating device 94. After the water purification system starts to produce water according to the working process of the above-mentioned water production mode, since the third solenoid valve 91 is opened, the pure water produced by the reverse osmosis filter element 2 will flow through the third solenoid valve 91 to the first pressure-stabilizing valve 92. The pressure of the pure water flowing out of the first pressure-stabilizing valve 92 is stable, and then under the action of the water pump 93, the pure water will flow to the instant heating device 94 for heating. The heated pure water can flow out from the hot water interface 95 at one end of the hot water pipeline, and then flow out from the hot water outlet of the smart faucet for user use.

[0068] here, Figure 4 FIG. 1 is a schematic diagram of a water purification system according to an exemplary embodiment. Figure 4 As shown, in Figure 1 On the basis of the water purification system shown, the other end of the hot water pipeline 9 can also be connected between the second solenoid valve 71 and the water storage port 113 on the return pipeline 7. In this way, in the hot water taking mode, only the pure water in the water drive tank can flow out from the water storage port 113, and flow to the hot water interface after being heated by the hot water pipeline 9.

[0069] here, Figure 5 is a schematic diagram of a water purification system according to an exemplary embodiment. Figure 5 As shown, in Figure 4 On the basis of the above, the water storage port 113 may also have two interfaces, a water storage inlet and a water storage outlet. In this case, the other end of the hot water pipeline 9 may be connected between the second solenoid valve 71 on the return pipeline 7 and the water storage outlet 1132 of the water storage port 113. Of course, in other embodiments, when the water storage port 113 has two interfaces, a water storage inlet and a water storage outlet, the other end of the hot water pipeline 9 may also be connected to the pure water outlet 23, or the other end of the cold water pipeline 8 may be connected to the water storage outlet 1132, etc. Various situations may be freely combined and are not illustrated one by one here.

[0070] Here, you can also Figure 2 A hot water pipeline 9 is provided on the basis shown in the figure. Figure 6 is a schematic diagram of a water purification system according to an exemplary embodiment. Figure 6 As shown, in Figure 2On the basis shown, the other end of the hot water pipeline 9 is connected between the second solenoid valve 71 on the return pipeline 7 and the water storage outlet 1132 of the water storage port 113. In this way, when taking hot water, only the pure water in the water drive tank can flow out from the water storage outlet 1132, and flow to the hot water interface 95 after being heated by the hot water pipeline 9. When taking cold water, only the pure water in the water drive tank can flow out from the water storage port 113, and flow to the cold water interface 81 through the cold water pipeline 8.

[0071] In a possible embodiment, the first switch 62 includes a check valve or a solenoid valve.

[0072] For example, Figures 1 to 6 As shown, the first switch 62 is a check valve. Figure 7 As shown, Figure 7 is a schematic diagram of a water purification system according to an exemplary embodiment. Figure 3 On the basis of the above, the first switch 62 is set as a solenoid valve. The first switch 62 is a solenoid valve, which is suitable for areas with low water pressure and can avoid affecting the flow of cold water. Figure 1 , Figure 2 , Figures 4 to 6 The first switch 62 in the example can be replaced with a solenoid valve, which is not shown in the figure here.

[0073] In a possible embodiment, the second switch 82 includes a high-voltage switch or a solenoid valve.

[0074] For example, Figures 1 to 7 As shown, the second switch 82 is a solenoid valve. Figure 8 As shown, Figure 8 is a schematic diagram of a water purification system according to an exemplary embodiment. Figure 3 On the basis shown, the second switch 82 is set as a high-pressure switch. The case where the second switch 82 is a high-pressure switch is suitable for adapting the water purification system to a pipeline machine. Fig. 9 is a schematic diagram of a water purification system according to an exemplary embodiment. Figure 1 On the basis of the above, the second switch 82 is set as a high-pressure switch. The second switch 82 is a high-pressure switch, which is suitable for adapting the water purification system to the pipeline machine. Figure 2 , Figures 4 to 7 The first switch 62 in the example can be replaced with a high-voltage switch, which is not shown in the figure here.

[0075] Here, when the second switch 82 is a solenoid valve, the water purification system can use the second switch 82 as the on-off switch of the cold water pipeline 8. When the water purification system receives the cold water taking instruction input by the user, the second switch 82 will be turned on, so that the pure water produced by the reverse osmosis filter element 2 passes through the cold water pipeline 8 and reaches the cold water interface 81. When the second switch 82 is a high-pressure switch, the water purification system can use the second switch 82 as the water making switch of the water purification system. When the cold water faucet connected to the water purification system is turned on, the high-pressure switch detects that the water pressure is smaller than the preset low threshold, and the water purification system will open the first solenoid valve 41 and the booster pump 42 to start water making, and the pure water produced by the reverse osmosis filter element 2 will be delivered to the cold water interface 81 through the cold water pipeline 8.

[0076] In a possible embodiment, the other end of the return line 7 can be Figures 3 to 8 As shown, it is connected to the pipeline between the first solenoid valve 41 and the boost pump 42, or, as shown Figure 1 , Figure 2 or Fig. 9 As shown, the other end of the reflux pipeline 7 is connected to the pipeline between the booster pump 42 and the purified water inlet 21 of the reverse osmosis filter element 2 .

[0077] For example, Fig.10 is a schematic structural diagram of a water purification system according to an exemplary embodiment. Fig.11 is a schematic structural diagram of a water purification system according to an exemplary embodiment. Fig.12 is a schematic structural diagram of a water purification system according to an exemplary embodiment. Fig.10 and Figure 3 The difference is that the position of the other end of the return line 7 is different, and the rest are the same. Fig.11 and Figure 4 The difference is that the position of the other end of the return line 7 is different, and the rest are the same. Fig.12 and Figure 6 The difference is that the other end of the return line 7 is located differently, and the rest is the same. Figure 5 , Figure 7 and Figure 8 The other end of the reflux pipeline 7 can also be connected to the pipeline between the booster pump 42 and the purified water inlet 21 of the reverse osmosis filter element 2, which is not shown in the figure one by one.

[0078] It should be noted here that, compared with connecting the other end of the reflux pipe 7 to the pipe between the booster pump 42 and the clean water inlet 21 of the reverse osmosis filter element 2, connecting the other end of the reflux pipe 7 to the pipe between the first solenoid valve 41 and the booster pump 42 does not require the water channel of the booster pump 42, thereby reducing the water consumption of the bubble membrane.

[0079] In a possible embodiment, Figures 2 to 12 As shown, a second pressure stabilizing valve 32 is provided on the water inlet pipeline 3 .

[0080] Here, the second pressure-stabilizing valve 32 is used to stabilize the water pressure of the tap water. Optionally, the second pressure-stabilizing valve 32 can be a pressure reducing valve, a constant pressure valve, etc. In this way, the pressure of the tap water flowing from the water inlet pipe 3 to the pre-composite filter element 1 is constant, avoiding the problem of excessive tap water pressure affecting the operation of the water drive tank, and avoiding the problem of excessive back pressure affecting the water production efficiency during the process of filling the water drive tank with water.

[0081] In one possible embodiment, Fig.13 is a schematic structural diagram of a pre-water drive composite filter element 1 according to an exemplary embodiment. Fig.13 As shown, the pre-water drive composite filter element 1 comprises:

[0082] The composite filter housing 11 is provided with a tap water inlet 111, a purified water outlet 112, and a water storage port 113. The tap water inlet 111 is connected to an external tap water port through a tap water interface 31 of a water purification system, so that external tap water enters the pre-composite filter 1, the purified water outlet 112 is the outlet of purified water after purification by the pre-composite filter, and the water storage port 113 is connected to the water inlet and outlet of the water drive tank, so that pure water stored in the water drive tank enters and exits.

[0083] like Fig.13 As shown, the pre-filter element includes a pre-filter element housing 12 and a first pre-filter element body 13, wherein Fig.13As shown, the pre-filter cartridge housing 12 is fixed in the composite filter cartridge housing 11. For example, the pre-filter cartridge housing 12 includes an upper end cover 121, a lower end cover 122 and a guide shell 123. The upper end cover 121 is a hollow annular cover body, which can be fixed in the composite filter cartridge housing 11. The lower end cover 122 is a plate-type cover body. The guide shell 123 is a cylindrical shell with a hollow interior. The upper end of the guide shell 123 is connected to the upper end cover 121 so that the internal hollow space is connected to the hollow space of the annular cover body. The lower end of the guide shell 123 is connected to the lower end cover 122. The pre-filter cartridge housing 12 forms an external annular cavity located on the outside of the guide shell 123 and an internal cylindrical cavity located on the inside of the guide shell 123. The external annular cavity is connected to the tap water inlet 111. The guide shell 123 is provided with a water hole 1231. Figure 1 As shown, the first pre-filter body 13 is located in the outer annular cavity. Here, the pre-filter includes a pre-filter housing 12 and a first pre-filter body 13. The opening between the outer side walls of the upper end cover 121 and the lower end cover 122 is the water inlet of the pre-filter, and the water hole 1231 on the guide shell 123 is the water outlet of the pre-filter. The water inlet of the pre-filter is connected to the tap water inlet 111 through the cavity between the composite filter housing 11, so that the tap water entering the tap water inlet 111 can enter the pre-filter from the water inlet of the pre-filter, and flow out from the water hole 1231 after being filtered by the first pre-filter body 13.

[0084] like Fig.13 As shown, the water drive tank 14 is located in the internal cylindrical cavity, including a water drive tank end cover 141 and a water drive tank water bag 142 fixedly connected to the water drive tank end cover 141, the water drive tank end cover 141 is connected to the inlet and outlet of the water drive tank water bag 142 and the water storage port 113, and the clean water cavity 15 between the water drive tank 14 and the pre-filter housing 12 is connected to the clean water outlet 112. Here, the water drive tank end cover 141 is fixed to the composite On the filter element housing 11, for example, the water drive tank end cover 141 can be directly fixed on the composite filter element housing 11; or, the water drive tank end cover 141 can also be fixed on the composite filter element housing 11 through the upper end cover 121, such as the upper end cover 121 is fixed to the composite filter element housing 11, the water drive tank end cover 141 is fixedly connected to the inner ring side wall of the upper end cover 121, etc., or, the water drive tank end cover 141 can also be fixed on the guide shell 123.

[0085] Here, the pre-composite filter element is as follows Figures 1 to 12As shown, it is arranged behind the tap water interface of the water purification system. After the external tap water enters the water purification system from the tap water interface of the water purification system, it can enter the pre-composite filter element through the tap water inlet 111 on the composite filter element. The clean water obtained after filtering and processing by the first pre-filter element main body 13 in the external annular cavity can enter the internal cylindrical cavity through the water hole 1231 of the guide shell 123, and flow to the clean water outlet 112 through the clean water cavity 15 between the water drive tank 14 and the pre-filter element housing 12. In this way, the clean water produced by the pre-composite filter element can flow out from the clean water outlet 112, and the subsequent operation can be as follows Figures 1 to 12 As shown, the water flows into the reverse osmosis filter element 2 through the clean water pipeline 4 for further purification.

[0086] Here, the water drive tank water bag 142 is a pure water storage space. The pure water produced by the reverse osmosis filter element 2 in the water purification system can enter the water drive tank water bag 142 from the water storage port 113 of the composite filter element housing 11 for storage. The pure water in the water drive tank water bag 142 can play a role in flushing the concentrated water side of the RO membrane. The cavity between the water drive tank water bag 142 and the guide shell 123 is a clean water cavity 15, which is used to accommodate the clean water after the pre-filter element is purified. The clean water in the clean water cavity 15 can play a role in regulating the amount of pure water stored in the water drive tank water bag 142. When the pure water pressure in the water drive tank water bag 142 is greater than the clean water pressure in the clean water cavity 15, the water drive tank 14 needs to fill with water to store water. At this time, the water drive tank water bag 142 will compress the clean water in the clean water cavity 15, so that the clean water in the clean water cavity 15 is discharged, and the volume of pure water in the water drive tank water bag 142 increases; when the pure water pressure in the water drive tank water bag 142 is less than the clean water pressure in the clean water cavity 15, the water drive tank 14 will drain water. At this time, the increased volume of clean water in the clean water cavity 15 squeezes the water drive tank water bag 142, and discharges the pure water in the water drive tank water bag 142.

[0087] It should be noted here that the water drive tank water bag 142 includes an elastic water bag, which is convenient for water to flow in and out under the pressure of tap water or pure water. The elastic material of the elastic water bag can be elastic materials such as rubber, silicone, etc., or other elastic polymer materials. Furthermore, the water stored in the water drive tank water bag 142 is not only used for soaking in the concentrated water side of the RO membrane, but also for drinking, so it can be made of food-grade elastic materials.

[0088] In this embodiment, the water drive tank structure and the pre-filter element can be integrated together to form the above-mentioned pre-composite filter element, thereby reducing the overall volume of the water purification system, solving the problem of increasing the volume of the pure water bubble membrane and water demand of the water purification system by setting a separate water drive tank, reducing the space occupied by the water purification system in the sink cabinet, and facilitating the installation of other household appliances in the sink cabinet.

[0089] In one possible embodiment, Fig.14is a schematic diagram of the structure of a pre-composite filter element according to an exemplary embodiment. Fig.14 As shown, the pre-filter housing 12 also includes: an internally hollow annular plate 124, which is fixed on the inner side of the guide shell 123; the pre-composite filter also includes a second pre-filter body 16, which is located in the internal cylindrical cavity between the annular plate 124 and the lower end cover 122; wherein the water hole 1231 is located on the guide shell 123 between the annular plate 124 and the lower end cover 122, and the water drive tank 14 is located in the internal cylindrical cavity between the annular plate 124 and the upper end cover 121.

[0090] Here, the water purified by the first pre-filter body 13 will enter the second pre-filter body 16 through the water hole 1231 for further purification, and then flow from the internal hollow of the annular plate 124 to the clean water cavity 15, and then flow out from the clean water outlet 112.

[0091] From the above, Fig.13 In the embodiment of the present invention, the water outlet of the pre-filter is the water hole 1231 of the guide shell 123, which is located on the side of the water bag 142 of the water drive tank. Fig.14 The water outlet of the pre-filter element of the embodiment is the inner hollow of the annular plate 124, which is located below the water bag 142 of the water drive tank. Fig.14 In the embodiment shown including the first pre-filter body 13 and the second pre-filter body 16, the tap water will be purified by more pre-filter bodies before flowing out, so the tap water can be better purified.

[0092] It should be noted that the first pre-filter body 13 and the second pre-filter body 16 include at least one filter material selected from PP cotton, activated carbon, origami PP, and non-woven fabric. The PP cotton can also be called filling cotton, which is a common artificial chemical fiber made of polypropylene fiber, and can filter colloidal impurities, micro-mud, rust, insect eggs, organic pollution, mineral impurities and other large particles in tap water. The pre-filter is mainly used for pre-treatment of the subsequent reverse osmosis filter to filter out large particles and prevent the reverse osmosis filter from being damaged.

[0093] In one possible embodiment, Fig.13 and Fig.14 As shown, the water storage port 113, the tap water inlet 111 and the purified water outlet 112 are located at the top of the composite filter element housing 11, so as to facilitate the installation or removal of the pre-composite filter element in the water purification system.

[0094] Of course, in other embodiments, the tap water inlet 111 can also be located at one end of the composite filter cartridge housing 11, and the clean water outlet 112 and the water storage port 113 are located at the opposite end of the tap water inlet 111. Alternatively, the clean water outlet 112 is located at the bottom of the composite filter cartridge housing 11, and the tap water inlet 111 and the water storage port 113 are located at the top of the composite filter cartridge housing 11; in this case, an opening can be provided on the lower end cover 122, and the clean water outlet 112 is directly connected through the opening. Alternatively, the water storage port 113 can also be located at the top of the composite filter cartridge housing 11, and the tap water inlet 111 and the clean water outlet 112 are located at the bottom of the composite filter cartridge housing 11. In this case, an opening can be provided on the lower end cover 122, and the opening is directly connected to the clean water outlet 112.

[0095] Various water outlets in the pre-composite filter element can be set at different positions, and different water outlets are connected to different water pipes in the water purification system. Various pre-composite filter elements with different water outlet positions can be used according to various designs inside the water purification system, so that the water channel in the water purification system is shorter and the volume of the water purification system is smaller. Of course, the above-mentioned water storage port 113 can be one interface or two interfaces, which are not shown in figures one by one here.

[0096] In one possible embodiment, Fig.15 is a schematic diagram of the structure of a pre-composite filter element according to an exemplary embodiment. Fig.15 As shown, the front water drive composite filter element 1 also includes a post filter element, wherein: the post filter element includes a post filter element housing 17 and a post filter element body 18; the post filter element housing 17 is located in the water drive tank 14, and includes a post upper end cover 171 and a post lower end cover 172, the post upper end cover 171 is a hollow annular cover body, fixedly connected to the composite filter element housing 11, and the post lower end cover 172 is a plate-type cover body; the post filter element body 18 is an annular cylinder, located in the post filter element housing 17, and the bag opening of the water bag 142 of the water drive tank is connected to the water storage port 113 through the post filter element body 18. For example, Fig.15 The water storage port 113 in the front and rear filter elements shown includes two interfaces. At this time, the water storage port 113 includes a water storage inlet 1131 for inputting pure water into the water drive tank 14, and a water storage outlet 1132 for transporting the pure water in the water drive tank 14 to the outside. The bag mouth of the water bag 142 of the water drive tank is connected to the water storage inlet 1131 in the water storage port 113 through the cavity between the water drive tank 14 and the rear filter element, and the middle cavity of the rear filter element body 18 is connected to the water storage outlet 1132 in the water storage port 113 through the hollow area of ​​the rear upper end cover 171.

[0097] Of course, in some other embodiments, the water storage port 113 may include only one interface, for example, Fig.15 One of the interfaces in the middle water storage port 113 is blocked, leaving only one interface as the water storage port. Correspondingly, the bag opening of the water bag 142 of the water drive tank is connected to the water storage port 113.

[0098] It should be noted here that the post-filter body includes activated carbon, ultrafiltration membrane, non-woven fabric and other filter materials used for pure water post-treatment, which can improve the taste of pure water.

[0099] Here, if Fig.15 As shown, the pure water produced by the reverse osmosis filter element 2 can enter the front and rear composite filter element 1 through the water storage inlet 1131, as shown in FIG. Fig.15 As shown, water can enter the water drive tank water bag 142 from the bag mouth of the water drive tank water bag 142 through the cavity between the water drive tank 14 and the post-filter element for storage; when the water drive tank water bag 142 drains water, it will be discharged from the bag mouth to the cavity between the water drive tank 14 and the post-filter element, and from the cavity it will enter the post-filter element body 16, and after being filtered by the post-filter element body 16, it will pass through the middle cavity of the post-filter element body 16 and be discharged from the water storage outlet 1132 in the water storage port 113, so as to be refluxed for pure water bubble film or for use by users.

[0100] In this possible embodiment, the post filter element in the water purification system can also be integrated into the reverse osmosis filter element 2. For example, Fig.15 Similar to the post-filter element shown in the water drive tank, the post-filter element can be placed in the hollow area of ​​the RO filter material of the spiral coil structure in the reverse osmosis filter element, so that the pure water purified by the RO filter material can be filtered by the post-filter element before flowing out from the pure water outlet 23 of the reverse osmosis filter element 2, flowing to the water drive tank for storage or flowing to the cold water interface or the hot water interface for user use. This can improve the taste of the pure water produced by the reverse osmosis filter element and enhance the user's water experience.

[0101] Of course, in other embodiments, the post-filter element may also be provided separately, such as being connected behind the pure water outlet 23 of the reverse osmosis filter element 2. Those skilled in the art may clearly understand that the specific deformation structure is not illustrated one by one here.

[0102] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure.

[0103] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure should be limited by the appended claims.

Claims

1. A water purification system, characterized in that: The water purification system includes a pre-filter element and a water drive tank integrated with a pre-filter element and a water drive composite filter element and a reverse osmosis filter element. The water purification system also includes: A water inlet pipeline, one end of which is a tap water interface, and the other end of which is connected to the tap water inlet of the front water drive composite filter element; A clean water pipeline, connecting the clean water outlet of the front water drive composite filter element and the clean water inlet of the reverse osmosis filter element, wherein a first solenoid valve and a booster pump are arranged on the clean water pipeline; A wastewater pipeline, one end of which is a wastewater interface of the water purification system, and the other end of which is connected to a wastewater outlet of the reverse osmosis filter element; A water storage pipeline, one end of which is connected to the pure water outlet of the reverse osmosis filter element, and the other end of which is connected to the water storage port of the pre-water drive composite filter element. A high-pressure switch and a first switch are provided on the water storage pipeline, and the first switch is used to limit the flow direction of the pure water in the water storage pipeline to flow from the pure water outlet to the water storage port; A reflux pipeline is connected to the water storage port of the front water drive composite filter element and the purified water inlet of the reverse osmosis filter element, and a second solenoid valve and a reflux check valve are arranged on the reflux pipeline; A cold water pipeline, one end of which is a cold water interface of the water purification system, and the other end of which is connected to a pure water outlet of the reverse osmosis filter element. A second switch is provided on the cold water pipeline, and the second switch is used to control the reverse osmosis filter element to produce pure water and flow to the cold water interface; The front water drive composite filter element comprises: A composite filter element housing, wherein the composite filter element housing is provided with a tap water inlet, a purified water outlet, and a water storage outlet; The pre-filter element comprises a pre-filter element housing and a first pre-filter element main body, wherein the pre-filter element housing is fixed in the composite filter element housing, and comprises an upper end cover, a lower end cover and a guide shell, the upper end cover is a hollow annular cover body, the lower end cover is a plate-type cover body, the guide shell is an internally hollow cylindrical shell, the upper end of the guide shell is connected to the upper end cover so that the internal hollow is connected to the hollow of the annular cover body, the lower end of the guide shell is connected to the lower end cover, the pre-filter element housing forms an external annular cavity located outside the guide shell and an internal cylindrical cavity located inside the guide shell, the external annular cavity is connected to the tap water inlet, and the guide shell is provided with a water hole; the first pre-filter element main body is located in the external annular cavity; The water drive tank is located in the internal cylindrical cavity, and includes a water drive tank end cover and a water drive tank water bag fixedly connected to the water drive tank end cover. The water drive tank end cover is connected to the inlet and outlet of the water drive tank water bag and the water storage port, and the clean water cavity between the water drive tank and the pre-filter housing is connected to the clean water outlet.

2. The water purification system according to claim 1, characterized in that: The water storage port includes an opening; Alternatively, the water storage port includes: two openings: a water storage inlet and a water storage outlet. Accordingly, the other end of the water storage pipeline is connected to the water storage inlet in the water storage port, and the return pipeline is connected to the water storage outlet in the water storage port.

3. The water purification system according to claim 2, characterized in that: The other end of the cold water pipeline is connected to the pure water outlet of the reverse osmosis filter element and includes: The other end of the cold water pipeline is connected to the water storage outlet, and is connected to the pure water outlet through the water drive tank and the water storage pipeline.

4. The water purification system according to any one of claims 1 to 3, characterized in that: The water purification system also includes: A hot water pipeline, one end of which is the hot water interface of the water purification system, and the other end of which is connected to the pure water outlet or connected between the second solenoid valve and the water storage port on the reflux pipeline. A third solenoid valve, a first pressure-stabilizing valve, a water pump and an instant heating device are provided on the hot water pipeline. The water pump is located between the first pressure-stabilizing valve and the instant heating device, and the instant heating device is located between the water pump and the hot water outlet.

5. The water purification system according to claim 4, characterized in that: The first switch includes one of a check valve and a solenoid valve.

6. The water purification system according to claim 4, characterized in that: The second switch includes one of a high-voltage switch or a solenoid valve.

7. The water purification system according to claim 4, characterized in that: One end of the reflux pipeline is connected to the water storage port, and the other end of the reflux pipeline is connected to the pipeline between the first solenoid valve and the booster pump, or the other end of the reflux pipeline is connected to the pipeline between the booster pump and the clean water inlet of the reverse osmosis filter element.

8. The water purification system according to claim 1, characterized in that: A second pressure-stabilizing valve is arranged on the water inlet pipeline.

9. The water purification system according to claim 1, characterized in that: The pre-filter housing further comprises: an annular plate with a hollow interior, the annular plate being fixed inside the guide housing; The pre-filter element further comprises a second pre-filter element body, and the second pre-filter element body is located in the inner cylindrical cavity between the annular plate and the lower end cover; Wherein, the water through hole is located on the guide shell between the annular plate and the lower end cover, and the water drive tank is located in the internal cylindrical cavity between the annular plate and the upper end cover.

10. The water purification system according to claim 1, characterized in that: A post-filter is also integrated in the front water drive composite filter element, wherein: the post-filter element includes a post-filter element housing and a post-filter element main body; the post-filter element housing is located in the water drive tank, and includes a post-upper end cover and a post-lower end cover, the post-upper end cover is a hollow annular cover body, which is fixedly connected to the composite filter element housing, and the post-lower end cover is a plate-type cover body; the post-filter element main body is an annular cylinder, which is located in the post-filter element housing, and the bag opening of the water bag of the water drive tank is connected to the water storage port through the post-filter element main body.

11. The water purification system according to claim 1, characterized in that: A post filter element is integrated in the reverse osmosis filter element.

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