Host system, water purification system and water purification method

Abstract

The present invention discloses a host system, a water purification system and a water purification method, which relate to the field of water treatment technology. The water purification system includes: a host system with an output port, the host system including: a water purification circuit and a sterilization circuit that can be connected to the output port, the sterilization circuit is used to output water with a sterilizing effect; a first signal generating unit that can generate a water circuit signal change at the output port; an extension system with an inlet end, the inlet end is connected to the output port, the extension system including: a water circuit and a discharge circuit that can be connected to the inlet end; an extension system detection unit, which is used to detect the water circuit signal at the inlet end; the extension system connects the discharge circuit to the inlet end according to the change of the water circuit signal detected by the extension system detection unit. The host system and the extension system in this application can respectively control their own systems according to the synchronous change of the water circuit signal detected in their own systems to switch to the state required for the water circuit during sterilization.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to a host system, a water purification system and a water purification method. Background Art

[0002] To meet the demand for purified water in large companies or commercial locations, a water purification system can be used in these locations. This type of water purification system generally consists of a main system and at least one extension system. The distance between the extension system and the main system is determined by the actual application location of the water purification system. Since the specific location of the extension system needs to be determined based on the user's actual water purification location, the distance between the extension system and the main system can be longer or shorter. The main system is used to filter and purify the incoming water, and then transmit the filtered and purified water to the extension system. The extension system can store and heat the purified water, thereby providing purified water of different temperatures to the user at any time.

[0003] During this process, because the extension system and the main system are connected by pipes, especially long ones, bacteria within the pipes can easily develop biofilms if water does not flow for extended periods. Biofilms not only breed large numbers of bacteria but also protect them. Biofilms in the pipes can release bacteria, causing excessive bacterial counts in the water and resulting in secondary contamination of the purified water during transport. Furthermore, biofilms can produce odors, which can lead to unpleasant odors in the water delivered to users of the extension system, seriously affecting their drinking water. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a host system, a water purification system and a water purification method. The host system or the extension system can respectively control its own system according to the synchronous changes of the water channel signal detected in its own system to switch to the state required by the water channel when the water purification system is sterilized.

[0005] The specific technical solution of the embodiment of the present invention is:

[0006] A water purification system, comprising:

[0007] A host system having an output port, the host system comprising: a water purification circuit and a sterilization circuit capable of communicating with the output port, the sterilization circuit being configured to output sterilizing water; and a first signal generating unit capable of generating a water circuit signal change at the output port;

[0008] An extension system having an inlet end, the inlet end being connected to the output port, the extension system comprising: a water supply line and a discharge line capable of being connected to the inlet end; the extension system detection unit being configured to detect a water line signal at the inlet end;

[0009] The extension system connects the discharge line with the inlet end according to the change of the water channel signal detected by the extension system detection unit.

[0010] Preferably, the water channel signal includes at least one of the following: a water pressure signal and a water flow signal.

[0011] Preferably, the host system controls its own system when a first preset condition is met, so that the sterilization circuit is connected to the output port to output water with sterilization effect.

[0012] Preferably, the water purification system also includes a control unit that controls the connection and disconnection between the water purification circuit, the sterilization circuit, the discharge circuit, and the water use circuit; the water purification system has at least two states: in the first state, the water purification circuit is connected to the water use circuit; in the second state, the sterilization circuit is connected to the discharge circuit so that the water output by the sterilization circuit is discharged through the discharge circuit; based on the first preset condition and the change of the water circuit signal detected by the extension system detection unit, the control unit controls the water purification system to switch from the first state to the second state.

[0013] Preferably, the water purification system further has a third state, in which the water purification line is connected to the discharge line.

[0014] Preferably, the control unit includes: a host system control unit, which controls the connection and disconnection of the water purification circuit and the sterilization circuit. According to the first preset condition, the host system control unit controls the water purification circuit to be connected to the output port and switches the purified water output to the sterilization circuit to be connected to the output port, and the water output from the sterilization circuit is output through the output port; an extension system control unit, which controls the connection and disconnection of the discharge circuit and the water use circuit. According to the change of the water circuit signal detected by the extension system detection unit, the extension system control unit controls the discharge circuit to be connected to the inlet end and the water use circuit to be disconnected, so that the incoming water is discharged through the discharge circuit.

[0015] Preferably, the host system has an input port, and the control unit includes: a host system control unit, which controls the connection and disconnection of the water purification circuit and the sterilization circuit; an extension system control unit, which controls the connection and disconnection of the discharge circuit and the water use circuit; in a first state, the host system control unit controls the input port, the water purification circuit and the output port to be connected, and the sterilization circuit is disconnected, and the extension system control unit controls the inlet end to be connected to the water use circuit, and the discharge circuit is disconnected; in a second state, the host system control unit controls the input port, the sterilization circuit and the output port to be connected, and the water purification circuit is disconnected, and the extension system control unit controls the inlet end to be connected to the discharge circuit, and the water use circuit is disconnected.

[0016] Preferably, the water purification system also has a third state. In the third state, the water purification circuit is connected to the discharge circuit, the host system control unit controls the input port, the water purification circuit and the output port to be connected, and the sterilization circuit is disconnected, and the extension system control unit controls the inlet port to be connected to the discharge circuit, and the water use circuit is disconnected.

[0017] Preferably, the extension system detection unit includes a device capable of detecting water pressure or a device capable of detecting water flow.

[0018] Preferably, the first signal generating unit includes a pressure boosting device; the extension system detection unit includes a second high-pressure switch or a second pressure detection device provided on the extension system for detecting the pressure at the inlet end.

[0019] Preferably, the host system also includes a host system detection unit, which is used to detect the water path signal at the output port. The host system connects the sterilization circuit with the output port according to the change of the water path signal detected by the host system detection unit, and the sterilization circuit outputs water with sterilization effect.

[0020] Preferably, the extension system detection unit includes a device capable of detecting water pressure or a device capable of detecting water flow.

[0021] Preferably, the first signal generating unit includes a pressure boosting device; the host system detection unit includes a first high-pressure switch provided on the water purification line and capable of detecting the pressure at the output port; the extension system detection unit includes a second high-pressure switch provided on the extension system and capable of detecting the pressure at the inlet port, and the predetermined pressure value of the first high-pressure switch is equal to the predetermined pressure value of the second high-pressure switch;

[0022] The host system has an input port, and the water purification system also includes a control unit, which includes: a host system control unit and an extension system control unit; when the pressure at the first high-pressure switch reaches the preset pressure value of the first high-pressure switch, the host system control unit controls the input port, the sterilization circuit and the output port to be connected, and the water purification circuit is disconnected; when the pressure at the second high-pressure switch reaches the preset pressure value of the second high-pressure switch, the extension system control unit controls the inlet port to be connected to the discharge circuit, and the water use circuit is disconnected.

[0023] Preferably, the water purification circuit further comprises a water storage device capable of communicating with the water purification unit;

[0024] The host system detection unit further includes a third high-pressure switch provided on a circuit at the water storage device, wherein a predetermined pressure value of the third high-pressure switch is smaller than a predetermined pressure value of the first high-pressure switch.

[0025] Preferably, when the pressure at the first high-pressure switch reaches the preset pressure value of the first high-pressure switch, the pressure at the second high-pressure switch reaches the preset pressure value of the second high-pressure switch, and the pressure at the third high-pressure switch reaches the preset pressure value of the third high-pressure switch, the host system control unit controls the water purification circuit to be connected to the output port and switches the purified water output to be connected to the sterilization circuit and the output port, and the water output by the sterilization circuit is output through the output port, and the extension system control unit controls the water use circuit to be connected to the inlet end and switches to be connected to the discharge circuit and the inlet end, so that the incoming water is discharged through the discharge circuit.

[0026] Preferably, the host system has an input port, and the first signal generating unit includes a boosting device; the host system detection unit includes a first pressure detection device arranged on the water purification line and capable of detecting the pressure at the output port; the extension system detection unit includes a second pressure detection device arranged on the extension system to detect the pressure at the inlet end. When the pressure detected by the first pressure detection device reaches a first preset value, the host system control unit controls the input port, the sterilization line and the output port to be connected, and the water purification line is disconnected; when the pressure detected by the second pressure detection device reaches a second preset value, the first preset value is equal to the second preset value, and the extension system control unit controls the inlet end to be connected to the discharge line, and the water use line is disconnected.

[0027] Preferably, the water purification circuit also includes a water storage device that can be connected to the water purification unit; when the pressure detected by the first pressure detection device reaches a third preset value, the third preset value is less than the first preset value, and the pressure detected by the first pressure detection device reaches the first preset value, the host system control unit controls the input port, the sterilization circuit and the output port to be connected, and the water purification circuit is disconnected; when the pressure detected by the second pressure detection device reaches a second preset value, the extension system control unit controls the inlet end to be connected to the discharge circuit, and the water use circuit is disconnected.

[0028] Preferably, the sterilization circuit includes: an electrolysis sterilization module, which is used to hydrolyze water for sterilization; the water use circuit at least includes: a water storage mechanism for supplying water to users.

[0029] Preferably, the water purification circuit includes a water purification unit, and the water purification unit includes one of a reverse osmosis membrane filtration unit and a nanofiltration membrane filtration unit; the water purification system also includes: an electronic control unit, when the water circuit stops using water, the electronic control unit controls the boosting device to continue working, so that the pressure downstream of the boosting device in the water purification circuit and the extension system increases.

[0030] Preferably, the water purification unit further comprises a microfiltration activated carbon composite filter element connected downstream of the reverse osmosis membrane filtration unit or the nanofiltration membrane filtration unit, and one end of the sterilization circuit is connected to the downstream of the microfiltration activated carbon composite filter element.

[0031] Preferably, the extension system has an outlet end, the water line is connected to the outlet end, and the discharge line is connected to the outlet end.

[0032] A water purification method using any of the above-described water purification systems, the water purification method comprising:

[0033] The control unit controls the water purification circuit to be connected to the water use circuit;

[0034] When the water supply line stops using water, the first signal generating unit generates a water supply signal change at the output port;

[0035] The extension system detection unit detects a change in the water path signal at the inlet end, so as to connect the discharge line with the inlet end.

[0036] Preferably, the water purification method further comprises: when a first preset condition is met, controlling the sterilization circuit to be connected to the output port to output water with a sterilization effect.

[0037] Preferably, the host system further comprises a host system detection unit, which is used to detect the water channel signal at the output port;

[0038] The water purification method further includes: the host system detection unit detects a change in the water channel signal at the output port, and controls the sterilization circuit to be connected to the output port to output water with a sterilization effect.

[0039] Preferably, the water purification method further comprises:

[0040] After the sterilizing water outputted from the sterilization circuit is discharged through the discharge circuit, the clean water circuit is controlled to be connected to the discharge circuit so that the clean water is discharged through the discharge circuit.

[0041] Preferably, the first signal generating unit includes a pressure boosting device; the host system detection unit includes a first high-pressure switch provided on the water purification line and capable of detecting the pressure at the output port; the extension system detection unit includes a second high-pressure switch provided on the extension system and capable of detecting the pressure at the inlet port, and the predetermined pressure value of the first high-pressure switch is equal to the predetermined pressure value of the second high-pressure switch;

[0042] When the pressure at the first high-pressure switch reaches the preset pressure value of the first high-pressure switch and the pressure at the second high-pressure switch reaches the preset pressure value of the second high-pressure switch, indicating that the water circuit stops using water, the extension system detection unit detects the change of the water circuit signal at the inlet end and the host system detection unit detects the change of the water circuit signal at the output port.

[0043] Preferably, after each first preset time interval, when the water circuit stops using water, the boosting device is controlled to work, and when the pressure at the output port and the inlet end of the extension system reaches the predetermined pressure value of the first high-pressure switch, the sterilization circuit is controlled to be connected to the discharge circuit so that the water output from the sterilization circuit is discharged through the discharge circuit.

[0044] Preferably, when the duration of the influent water being discharged through the discharge line after electrolysis reaches a third preset time, the control unit controls the purified water line to be connected to the discharge line, so that the purified water is discharged through the discharge line;

[0045] The water purification method further comprises:

[0046] When the duration for which the clean water is discharged through the discharge line reaches a fourth preset time, the control unit controls the discharge line to be disconnected.

[0047] A water purification system, comprising:

[0048] A host system having an output port, the host system comprising: a water purification circuit and a sterilization circuit capable of communicating with the output port, the sterilization circuit being configured to output sterilizing water; and a host system detection unit configured to detect a water circuit signal at the output port;

[0049] An extension system having an inlet end, the inlet end being connected to the output port, the extension system comprising: a water supply line and a discharge line capable of being connected to the inlet end; a second signal generating unit capable of generating a water channel signal change at the inlet end;

[0050] The host system connects the sterilization circuit with the output port according to the change of the water circuit signal detected by the host system detection unit, and outputs water with sterilization effect.

[0051] Preferably, the extension system controls its own system when the second preset condition is met, so that the discharge line is connected to the inlet end to output water with sterilization effect.

[0052] Preferably, the water purification system also includes a control unit that controls the connection and disconnection between the water purification circuit, the sterilization circuit, the discharge circuit, and the water use circuit; the water purification system has at least two states: in the first state, the water purification circuit is connected to the water use circuit; in the second state, the sterilization circuit is connected to the discharge circuit so that the water output by the sterilization circuit is discharged through the discharge circuit; based on the second preset condition and the change of the water circuit signal detected by the host system detection unit, the control unit controls the water purification system to switch from the first state to the second state.

[0053] Preferably, the water purification system further has a third state, in which the water purification line is connected to the discharge line.

[0054] Preferably, the second signal generating unit includes a boosting device; the host system detection unit includes a first high-voltage switch or a first pressure detection device provided on the host system for detecting the pressure at the output port.

[0055] A water purification method using any of the above-described water purification systems, the water purification method comprising:

[0056] The control unit controls the water purification circuit to be connected to the water use circuit;

[0057] When the water supply line stops using water, the second signal generating unit generates a water supply signal change at the inlet end;

[0058] The host system detection unit detects the change of the water channel signal at the output port, so that the sterilization circuit is connected to the output port and outputs water with sterilization effect.

[0059] Preferably, the extension system further comprises an extension system detection unit, which is used to detect the waterway signal at the inlet end;

[0060] The water purification method further includes: the extension system detection unit detects a change in the water channel signal at the inlet end, and controls the discharge line to be connected to the inlet end.

[0061] A host system having an output port, comprising: a water purification circuit and a sterilization circuit capable of communicating with the output port, a host system control unit, a host system detection unit, and a first signal generating unit capable of generating a water circuit signal change at the output port; the water purification circuit comprising a water purification unit for filtering water; the sterilization circuit comprising a sterilization module for hydrolyzing water for sterilization;

[0062] The host system control unit controls the on / off of the water purification circuit and the sterilization circuit;

[0063] The host system detection unit is used to detect the water path signal at the output port. The host system controls the host system control unit to switch the connection between the water purification line and the output port so that the sterilization line is connected to the output port according to the change of the water path signal detected by the host system detection unit. The incoming water passes through the sterilization line and is output through the output port.

[0064] The technical solution of the present invention has the following significant beneficial effects:

[0065] In the present application, the output port of the main system of the water purification system is directly connected to the inlet port of the extension system. Therefore, when the water path signal at the output port and the water path signal at the inlet port are of the same type, the changes between the two are synchronous. That is, changes in the water path signal at the output port will inevitably cause synchronous changes in the water path signal at the inlet port. For example, the water path signal can be a water pressure signal, a water flow signal, etc. The changes in such water path signals at the output port of the main system are synchronous with the changes at the inlet port of the extension system. Therefore, the first signal generating unit of the main system can generate a water path signal change at the output port. The extension system can control its own system based on the fact that the extension system detection unit can detect the same type of water path signal at the inlet port, so that the discharge line is connected to the inlet port. This satisfies the required water path state when the water purification system is sterilizing. This avoids the need for a transmission signal line or wireless communication connection between the main system and the extension system to communicate with each other and ensure that their respective operations can be synchronized. Through the above process, the main system and the extension system can be placed remotely.

[0066] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which 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 thereby. Within the spirit and scope of the appended claims, the embodiments of the present invention include many variations, modifications, and equivalents. Features described and / or illustrated with respect to 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

[0067] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0068] Figure 1 This is a schematic structural diagram of a water purification system in a first embodiment of the present invention;

[0069] Figure 2 This is a schematic structural diagram of a water purification system in a second embodiment of the present invention;

[0070] Figure 3 Schematic diagram of the structure of the water purification system in the third embodiment of the present invention;

[0071] Figure 4 Schematic diagram of the structure of the host system of the water purification system in the fourth embodiment of the present invention.

[0072] Reference numerals in the above drawings:

[0073] 1. Input port; 2. Water purification circuit; 211. Microfiltration activated carbon composite filter element; 212. Reverse osmosis membrane filtration unit or nanofiltration membrane filtration unit; 213. Second-stage filter element; 22. First high-pressure switch; 23. Water storage device; 24. Third high-pressure switch; 25. First pressure detection device; 26. Second switch device; 27. Second-stage filter element; 28. Second one-way valve; 29. Fourth one-way valve; 210. Combination valve; 3. Sterilization circuit; 31. Electrolytic sterilization module; 32. First switch Closing device; 33, first one-way valve; 4, output port; 5, inlet port; 6, discharge line; 61, third switching device; 62, third one-way valve; 7, water supply line; 71, water storage mechanism; 72, hot tank; 73, fourth switching device; 74, first water outlet valve; 75, second water outlet valve; 8, second high-pressure switch; 9, second pressure detection device; 10, pre-filter element; 11, water inlet valve; 12, first signal generating unit; 13, fifth switching device; 14, fourth one-way valve;

[0074] 100, host system; 200, extension system; 300, pipeline. DETAILED DESCRIPTION

[0075] 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 for illustrative purposes only and are not to 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 considered to be "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, they can refer to mechanical or electrical connections, internal communication between two elements, direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms 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.

[0076] 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.

[0077] In order to enable the host system or the extension system to respectively control its own system according to the synchronous changes of the water channel signal detected in its own system to switch to the state required by the water channel when the water purification system is sterilizing, a water purification system is proposed in this application. Figure 1 This is a schematic structural diagram of a water purification system in a first embodiment of the present invention. Figure 2 This is a schematic structural diagram of a water purification system in a second embodiment of the present invention. Figure 3 FIG. 1 is a schematic structural diagram of a water purification system according to a third embodiment of the present invention. Figures 1 to 3 As shown, the water purification system may include: a host system 100 having an output port 4, the host system 100 including: a water purification line 2 and a sterilization line 3 that can be communicated with the output port 4, the sterilization line 3 being used to output water with a sterilization effect; a first signal generating unit 12 that can cause a change in the water path signal at the output port 4; an extension system 200 having an inlet end 5, the inlet end 5 being communicated with the output port 4, the extension system 200 including: a water use line 7 and a discharge line 6 that can be communicated with the inlet end 5; the extension system detection unit, which is used to detect the water path signal at the inlet end; the extension system 200 connects the discharge line 6 with the inlet end 5 according to the change in the water path signal detected by the extension system detection unit.

[0078] In the present application, the output port 4 of the host system 100 of the water purification system is directly connected to the inlet port 5 of the extension system 200. Therefore, when the water channel signal at the output port 4 and the water channel signal at the inlet port 5 are of the same type, the changes between the two are synchronous, that is, the change of the water channel signal at the output port 4 will inevitably cause the synchronous change of the water channel signal at the inlet port 5. For example, the water path signal can be a water pressure signal, a water flow signal, etc. The change of this type of water path signal at the output port 4 of the host system 100 is synchronized with the change at the inlet port 5 of the extension system 200. Therefore, the first signal generating unit 12 of the host system 100 can generate a water path signal change at the output port 4. The extension system 200 can control its own system based on the fact that the extension system detection unit can detect the same type of water path signal at the inlet port 5, so that the discharge line 6 is connected to the inlet port 5. This satisfies the required state of the water path when the water purification system is sterilizing. This avoids the need for the host system 100 and the extension system 200 to be connected by a transmission signal line or wireless communication connection to communicate with each other so as to ensure that their respective operations can be performed synchronously. Through the above process, the host system 100 and the extension system 200 can be placed at a distance.

[0079] In order to better understand the water purification system in this application, it will be further explained and illustrated below. Figure 1 As shown, the water purification system may include: a host system 100, a sub-system 200 and a control unit. Since the host system 100 and the sub-system 200 are installed and placed far apart, the host system 100 and the sub-system 200 need to be connected through a pipeline 300.

[0080] like Figures 1 to 3As shown, the host system 100 has an output port 4 and an input port 1. Input port 1 is used to input water into the host system 100 and is generally connected to tap water. Output port 4 is used to connect the host system 100 to a pipeline 300. The host system 100 primarily comprises a water purification circuit 2 and a sterilization circuit 3, both of which are communicable with the output port. The water purification circuit 2 and the sterilization circuit 3 can be connected in parallel. The water purification circuit 2 includes a water purification unit for filtering water. The sterilization circuit 3 is used to generate or inject sterilizing substances to impart a sterilizing effect to the water passing through it. For example, the sterilization circuit 3 may include an electrolytic sterilization module 31 for hydrolyzing water to generate sterilizing substances for sterilization. The sterilization circuit 3 may also include a sterilizing substance dissolving mechanism to dissolve the sterilizing substances in the water as it passes through the sterilizing substance dissolving mechanism, thereby imparting a sterilizing effect to the water. A first one-way valve 33 may be installed on the sterilization circuit 3, connecting the water from the input port 1 to the output port 4, to prevent backflow in the sterilization circuit 3. For example, the water purification unit may include a reverse osmosis membrane filtration unit 212 or a nanofiltration membrane filtration unit 212, a microfiltration activated carbon composite filter element 211 connected downstream of the reverse osmosis membrane filtration unit and the nanofiltration membrane filtration unit, and the like. The filtration membrane units such as the reverse osmosis membrane filtration unit and the nanofiltration membrane filtration unit have a wastewater end, which may be connected to a combination valve 210 having a wastewater ratio function and an on-off function and a fourth one-way valve 29.

[0081] like Figures 1 to 3 As shown, the host system 100 includes a first signal generating unit 12, which can generate a water path signal change at the output port. For example, the first signal generating unit 12 can generate water pressure changes, water flow changes, etc. at the output port 4, thereby generating a water path signal change. In a feasible embodiment, the first signal generating unit 12 may include a boosting device, which can generate both water pressure changes and water flow changes, and the boosting device can be connected to the output port 4. Preferably, the boosting device can be installed upstream of the reverse osmosis membrane filtration unit and the nanofiltration membrane filtration unit. Optionally, a pre-filter element 10 and a water inlet valve 11 arranged upstream of the pre-filter element 10 can be installed at the input port 1 of the host system 100, and the water purification unit may further include a second-stage filter element 27 installed upstream of the first signal generating unit 12.

[0082] The water purification system may include an electronic control unit, which is used to control the first signal generating unit and control when it operates, thereby generating a change in the water circuit signal at the output port 4. For example, when the water circuit 7 stops using water, the electronic control unit can control the first signal generating unit 12 to operate, so that the pressure downstream of the first signal generating unit 12 in the water purification circuit 2 and the extension system 200 increases. In another feasible embodiment, Figure 4FIG. 1 is a schematic structural diagram of a host system of a water purification system according to a fourth embodiment of the present invention. Figure 4 As shown, in this embodiment, the difference is that the water purification system also includes a fifth switch device 13 connected in parallel with the second-stage filter element 27, and the inlet of the sterilization circuit 3 is connected to the outlet of the first signal generating unit 12. In the first state, the water purification circuit 2 is connected to the water supply circuit 7 and produces purified water. At this time, the fifth switch device 13 can be closed. In the second state, the fifth switch device 13 can be opened. At this time, the raw water can enter the sterilization circuit 3 under the pressure of the first signal generating unit 12, which helps to increase the flow rate. In this embodiment, the inlet of the microfiltration activated carbon composite filter element 211 is connected to the fourth one-way valve 14 that is connected from the water storage mechanism 71 to the microfiltration activated carbon composite filter element 211 to prevent the water pressure from being too high in the second state, causing the sterilizing water flowing out of the sterilization circuit 3 to flow back into the water storage mechanism 71.

[0083] like Figures 1 to 3 As shown, the extension system 200 has an inlet port 5. The inlet port 5 of the extension system 200 is connected to the output port 4 of the host system 100 through a pipe 300. The extension system 200 may include: a discharge line 6 that can be connected to the inlet port 5; and a water supply line 7 that can be connected to the inlet port 5. For example, the discharge line 6 may include a third one-way valve 62, which prevents the discharged water from flowing back. The water supply line 7 is used to provide purified water to the user. For example, the water supply line 7 may include at least: a water storage mechanism 71 for supplying water to the user. When the user needs hot water or water at different temperatures, the water supply line 7 may also include: a hot tank 72 connected to the water storage mechanism 71, which can receive the purified water from the water storage mechanism 71, and then heat and store it. The hot water outlet pipe 300 is connected to the hot water tank 72, and the hot water outlet pipe 300 can be provided with a first outlet valve 74. The cold water outlet pipe 300 is connected to the water storage device 23, and the cold water outlet pipe 300 can be provided with a second outlet valve 75. In this way, cold water, hot water, and warm water of different temperatures can be output according to different water output when both are output simultaneously. The extension system 200 can also include the extension system detection unit, which is used to detect the water circuit signal at the inlet end 5. The extension system detection unit can be set at the inlet end or at other locations. It only needs to be able to detect the water circuit signal at the inlet end 5. The extension system detection unit includes a device that can detect water pressure or a device that can detect water flow, etc., so that changes in pressure or flow at the inlet end 5 can be detected.

[0084] The control unit can be used to control the connection and disconnection between the water purification line 2, the sterilization line 3 and the discharge line 6 and the water use line 7. The water purification system has at least two states: in the first state, the water purification line 2 is connected to the water use line 7; in the second state, the sterilization line 3 is connected to the discharge line 6 so that the water output by the sterilization line 3 is discharged through the discharge line 6. In one feasible manner, based on the change of the water path signal generated by the first signal generating unit 12 at the output port 4 and the change of the water path signal detected by the extension system detection unit, the control unit controls the water purification system to switch from the first state to the second state. In another feasible manner, the host system 100 may include a host system detection unit, which is used to detect the water path signal at the output port 4. The host system 100 connects the sterilization line 3 with the output port 4 according to the change of the water path signal detected by the host system detection unit, and the sterilization line 3 outputs water with a sterilizing effect, thereby achieving the purpose of the control unit controlling the water purification system to switch from the first state to the second state.

[0085] In the water purification system of the present application, when the water line 7 needs to be purified, the water purification system connects the water purification line 2 with the water line 7 through the control unit, so that the purified water in the water purification line 2 can be delivered to the water line; when the pipe 300 connecting the host system 100 and the extension system 200 needs to be sterilized, since the water purification line 2 is connected to the water line 7, the change of the water channel signal at the output port 4 is synchronized with the change of the water channel signal at the inlet port 5. The extension system 200 can control its own system based on the fact that the extension system detection unit can detect the same type of water channel signal at the inlet port 5, so that the discharge line 6 is connected to the inlet port 5, thereby meeting the required state of the water channel when the water purification system is sterilized. The host system 100 can control its own system when a first preset condition is met, so that the sterilization line 3 is connected to the output port 4, wherein the first preset condition can be a certain time interval or a specific time point, or it can be the moment or after the first signal generating unit 12 generates a water channel signal change at the output port 4. Alternatively, the host system 100 can connect the sterilization circuit 3 with the output port 4 based on changes in the water signal detected by the host system detection unit. Through the above process, the host system 100 and the slave system 200 can determine when to switch to connecting the sterilization circuit 3 with the discharge circuit 6 by using their respective host system detection units and slave system detection units to detect changes in the water signal in their respective systems, or by using their own first signal generation unit 12 to detect changes in the water signal generated at the output port 4, and ensure that the switching time can be synchronized. This method does not require a wired or wireless communication connection between the host system 100 and the slave system 200 to transmit the simultaneous switching signal. In addition, the water purification system connects the sterilization circuit 3 with the discharge circuit 6 through the control unit. After the incoming water passes through the sterilization circuit 3 and is electrolyzed, it has a sterilizing effect. It enters the pipeline 300 and finally reaches the discharge circuit 6 for discharge. When the electrolyzed water passes through the pipeline 300, it can achieve the purpose of sterilizing the pipeline 300, effectively preventing the formation of bacterial biofilm, thereby avoiding the generation of odor in the pipeline 300 and improving the user experience.

[0086] The control unit is used to control the connection and disconnection between the water purification circuit 2, the sterilization circuit 3, the drain circuit 6, and the water supply circuit 7, so that the water purification system has at least two states: in the first state, the water purification circuit 2 is connected to the water supply circuit 7; in the second state, the sterilization circuit 3 is connected to the drain circuit 6, allowing water output from the sterilization circuit 3 to be discharged through the drain circuit 6. In the first state, the water purification circuit 2 can produce purified water and deliver the produced purified water to the water supply circuit via pipeline 300. It can also deliver the purified water stored in the water purification circuit 2 to the water supply circuit 7 via pipeline 300 for use by users at the water supply circuit 7 in the extension system 200. When sterilization of the pipeline 300 connecting the main system 100 and the extension system 200 is required, the water purification system is switched to the second state. In the second state, the control unit connects the sterilization circuit 3 to the drain circuit 6, and the incoming water is sterilized after passing through the sterilization circuit 3. The water enters the pipeline 300 and is ultimately discharged to the drain circuit 6 of the extension system 200. The water output from the sterilization circuit 3 can sterilize the pipeline 300 when passing through the pipeline 300, effectively preventing the formation of bacterial biofilm, thereby avoiding the generation of odor in the pipeline 300 and improving the user experience.

[0087] As a feasible option, under the control of the control unit, the water purification system can also have a third state. In this third state, the water purification circuit 2 is connected to the discharge circuit 6 via the pipeline 300. The water purification circuit 2 can produce purified water, which is then transported to the discharge circuit 6 of the sub-system 200 via the pipeline 300 for discharge. Alternatively, the purified water stored in the water purification circuit 2 can be transported to the discharge circuit 6 of the sub-system 200 via the pipeline 300 for discharge. During the purified water discharge process, the purified water can replace and flush out the sterilizing water in the pipeline 300 after being electrolyzed by the sterilization circuit 3.

[0088] In one feasible embodiment, the control unit may include: a host system control unit, which controls the connection and disconnection of the water purification line 2 and the sterilization line 3; and a slave system control unit, which controls the connection and disconnection of the discharge line 6 and the water supply line 7. Specifically, in a first state, the host system control unit controls the input port 1, the water purification line 2, and the output port 4 to be connected, and the sterilization line 3 to be disconnected. The slave system control unit controls the inlet port 5 to be connected to the water supply line 7, and the discharge line 6 to be disconnected, thereby connecting the water purification line 2 and the water supply line to produce purified water. In a second state, the host system control unit controls the input port 1, the sterilization line 3, and the output port 4 to be connected, and the water purification line 2 to be disconnected. The slave system control unit controls the inlet port 5 to be connected to the discharge line 6, and the water supply line 7 to be disconnected, thereby connecting the sterilization line 3 and the discharge line 6, so that the incoming water passes through the sterilization line 3 and is discharged through the discharge line 6. In the third state, the host system control unit controls the input port 1, the water purification line 2 and the output port 4 to be connected, and the sterilization line 3 is disconnected; the extension system control unit controls the inlet port 5 to be connected with the discharge line 6, and the water use line 7 is disconnected, so that the water purification line 2 is connected with the discharge line 6 and purified water is produced.

[0089] The control unit can have various implementations. For example, a switch device can be provided on the water purification line 2, the sterilization line 3, the discharge line 6, and the water supply line 7, respectively. Alternatively, a switching valve with a switching function can be installed at the connection between the water purification line 2 and the sterilization line 3, and a switching valve with a switching function can be installed at the connection between the discharge line 6 and the water supply line 7. The present application does not impose any restrictions on the implementation of the control unit. For example, the host system control unit can include: a first switch device 32 provided on the sterilization line 3, a second switch device 26 provided on the water purification line 2; the extension system control unit can include: a third switch device 61 provided on the discharge line 6, and a fourth switch device 73 provided on the water supply line.

[0090] In a feasible embodiment, in order to enable the water purification system to synchronously control the host system 100 and the extension system 200 at an appropriate time, for example, switching from the first state to the second state, such as Figure 1As shown, the detection unit may include a host system detection unit and the extension system detection unit. The host system detection unit is used to detect the water path signal at the output port 4, and the extension system detection unit is used to detect the water path signal at the inlet port 5. The host system 100 and the extension system 200 control their own systems according to the synchronized changes between the same type of water path signals detected by the host system detection unit and the extension system detection unit respectively. The water path signal can be data that changes synchronously between the water purification circuit 2 and the water use circuit 7, and is of the same type, such as water pressure, water flow, etc. The water path signal detected by the extension system detection unit at the inlet port 5 is of the same type as the water path signal detected by the host system detection unit at the output port 4, and both are either water pressure or water flow. By detecting synchronized changes in waterway signals, the host system 100 and the slave system 200 can independently and simultaneously switch the control unit to connect the sterilization line 3 with the discharge line 6. During this process, no wired or wireless communication is required between the host system 100 and the slave system 200 to transmit the synchronized switching signal. Synchronous changes can refer to synchronized increases or decreases in the same trend, or synchronized increases or decreases to the same value.

[0091] For example, if the waterway signal is water flow, the host system detection unit can be a flow detection device, and the extension system detection unit can also be a flow detection device. Since water flowing through output port 4 inevitably flows through inlet port 5, when the flow rate of water flowing through output port 4 changes, the flow rate of water flowing through inlet port 5 will also change in the same trend. If extension system 200 and host system 100 are both the same, the flow rate and the change value can also be exactly the same. Therefore, host system 100 and extension system 200 can control their own systems based on the synchronization of changes in flow rate detected by the host system detection unit and the extension system detection unit, respectively. Specifically, when a user at extension system 200 stops using water, extension system 200 detects a change in flow rate and enters standby or other operations. At the same time, host system 100 detects a change in flow rate and enters standby or stops water production, etc. In this process, extension system 200 and host system 100 do not need a wired or wireless connection to communicate to transmit signals for simultaneous switching or simultaneous corresponding operations.

[0092] For another example, the host system detection unit controls the water circuit signal at the output port 4, which may be water pressure, and the control unit controls the water purification circuit 2 to switch from being connected to the output port 4 to being connected to the sterilization circuit 3, so that the incoming water passes through the sterilization circuit 3 and is output through the output port 4. Based on the water circuit signal at the inlet port 5 detected by the slave system detection unit, which may be water pressure, the control unit controls the water supply circuit 7 to switch from being connected to the inlet port 5 to being connected to the discharge circuit 6, so that the incoming water is discharged through the discharge circuit 6.

[0093] In one possible implementation, Figures 1 to 3 As shown, when the first signal generating unit 12 includes a pressure boosting device, the extension system detection unit includes a second high-pressure switch 8 or a second pressure detection device 9 provided on the extension system to detect the pressure at the inlet end 5. In the first state, the purified water circuit 2 is producing water, and the water supply circuit receives the purified water produced by the purified water circuit 2, such as for storage or direct use. As a result, the pressures at the purified water circuit 2, the pipeline 300 between the host system 100 and the extension system 200, and the inlet end 5 are all at a low level. When the water supply circuit 7 is no longer in use, the pressure at the output port 4 increases, and the pressure at the inlet end 5 increases synchronously. When the pressure at the second high-pressure switch 8 reaches the predetermined pressure value of the second high-pressure switch 8, or when the pressure detected by the second pressure detection device reaches a second preset value, it indicates that the water supply circuit 7 has stopped supplying water. The extension system 200 connects the discharge line 6 to the inlet end 5, disconnecting the water supply circuit 7. Because the host system 100 increases the pressure change at the output port 4 through its own operation, it knows that it needs to switch the connection between the sterilization line 3 and the output port 4 and disconnect the water purification line 2. In this way, the water purification system can switch from the first state to the second state. The predetermined pressure value and the second preset value of the second high-pressure switch 8 can be greater than the pressure in the pipeline 300 when the water purification line 2 is in the water production state and the water consumption line receives the purified water produced by the water purification line 2.

[0094] Preferably, the host system 100 may include a host system detection unit, which includes a first high-pressure switch 22 or a first pressure detection device 25 provided on the host system 100 for detecting the pressure at the output port 4. When the pressure at the pressure point of the first high-pressure switch 22 reaches the predetermined pressure value of the first high-pressure switch 22, or the pressure detected by the first pressure detection device reaches the first preset value, it indicates that the water supply line 7 stops using water, and the host system 100 connects the sterilization line 3 to the output port 4 and disconnects the water purification line 2. This is another way for the host system to switch itself, so that the water purification system can switch from the first state to the second state. The predetermined pressure value of the first high-pressure switch 22 can be equal to the predetermined pressure value of the second high-pressure switch 8, and the first preset value is equal to the second preset value. In the above embodiment, since the host system 100 and the slave system 200 are far apart, direct wiring is not possible between them for communication. Instead, the host system 100 and the slave system 200 measure the pressure at the output port 4 of the water purification line 2 and the pressure at the inlet port 5 of the slave system 200 through their respective first high-pressure switches 22 and second high-pressure switches 8 or first pressure detection devices 25 and second pressure detection devices 9, thereby achieving synchronous entry of the host system 100 and the slave system 200 into the second state. This avoids the need for communication wiring between the host system 100 and the slave system 200 for synchronous control.

[0095] For example, if the installation positions of the first high-pressure switch 22 and the second high-pressure switch 8 can be connected through the pipeline 300, and there is no pressure difference, the preset pressure value of the first high-pressure switch 22 is equal to the preset pressure value of the second high-pressure switch 8. If there is a pressure difference before and after the water purification unit on the water purification line 2, that is, the water purification unit will cause the water flow to have a pressure drop, then the first high-pressure switch 22 needs to be set downstream of the water purification unit. For example, the first high-pressure switch 22 can be installed downstream of the reverse osmosis membrane filtration unit and the nanofiltration membrane filtration unit. Since the pressure drop of the microfiltration activated carbon composite filter element 211 is very small and can be basically ignored, the first high-pressure switch 22 can be installed upstream or downstream of the microfiltration activated carbon composite filter element 211. The installation principle of the first pressure detection device and the second pressure detection device is the same as above.

[0096] As preferably, Figure 1As shown, the water purification circuit 2 may also include a water storage device 23 that can be connected to the water purification unit. For example, in this mode, the water purification circuit 2 can output the stored purified water through a pipeline. When the water purification unit includes one of a reverse osmosis membrane filtration unit and a nanofiltration membrane filtration unit 212, the water storage device 23 is connected to the purified water outlet of the reverse osmosis membrane filtration unit or the nanofiltration membrane filtration unit 212. In order to prevent the water in the water storage device 23 from flowing back upstream, a second one-way valve 28 that is connected from the input port 1 to the output port 4 can be provided between the water storage device 23 and the reverse osmosis membrane filtration unit or the nanofiltration membrane filtration unit. As a feasible option, the water storage device 23 can be installed upstream of the microfiltration activated carbon composite filter element 211 to prevent the sterilization circuit 3 from producing sterilizing water that contaminates the water storage device 23 in the second state. The host system detection unit also includes a third high-pressure switch 24, located on the circuitry at the water storage device 23. The third high-pressure switch 24 is used to detect the pressure at the connection to the water storage device 23. The predetermined pressure value of the third high-pressure switch 24 is lower than the predetermined pressure value of the first high-pressure switch 22. When the water supply circuit 7 is in use, the water purification circuit 2 is in water production mode. The produced water and the water in the water storage device 23 are simultaneously supplied to the water supply circuit 7, thereby increasing the instantaneous output flow of purified water. When the water supply circuit 7 is no longer in use, the water purification circuit 2 remains in water production mode, with the produced water flowing into the water storage device 23 to replenish the water storage device 23. When the water storage device 23 is full, the pressure in the water purification circuit 2, the pipeline 300 between the host system 100 and the extension system 200, and the inlet port 5 increases, initially reaching the predetermined pressure value of the third high-pressure switch 24. When the pressure in the circuitry at the water storage device 23 reaches the predetermined pressure value of the third high-pressure switch 24, the water storage device 23 is considered full. The preset pressure value of the third high-pressure switch 24 is the pressure value in the circuit of the water storage device 23 at the moment when the water storage device 23 is just filled with water. The water purification circuit 2 continues to slowly produce water, and the pressure in the water purification circuit 2, the pipeline 300 between the main system 100 and the extension system 200, and the inlet port 5 rises accordingly. When the pressure at the first high-pressure switch 22 reaches the preset pressure value of the first high-pressure switch 22, the pressure at the second high-pressure switch 8 reaches the preset pressure value of the second high-pressure switch 8, and the pressure at the third high-pressure switch 24 reaches the preset pressure value of the third high-pressure switch 24, the water purification system can switch from the first state to the second state. When the water purification system enters the second state, the main system control unit controls the connection of the input port 1, the sterilization circuit 3, and the output port 4, disconnects the water purification circuit 2, and discharges the inlet water through the output port 4 after electrolysis. The extension system control unit controls the connection of the inlet port 5 with the discharge circuit 6 and disconnects the water supply circuit 7, allowing the inlet water to be discharged through the discharge circuit 6.The predetermined pressure value and the second preset value of the second high-pressure switch 8 can be greater than the pressure value in the pipeline 300 when the purified water line 2 is in the water production state and the water storage device 23 receives the purified water produced by the purified water line 2.

[0097] In another possible embodiment, Figure 2 As shown, the host system detection unit may include a first pressure detection device 25 disposed on the water purification circuit 2 and capable of detecting the pressure at the output port 4. The water purification circuit 2 may also include a water storage device 23 that can be connected to the water purification unit. When the water supply circuit is in use, the water purification circuit 2 is in a water production state, and the produced water and the water in the water storage device 23 are simultaneously supplied to the water supply circuit to increase the instantaneous output flow of purified water. When the water supply circuit is no longer in use, the water purification circuit 2 is still in a water production state, and the produced water flows into the water storage device 23 to replenish the water storage device 23. When the water storage device 23 is full of water, the pressure in the water purification circuit 2, the pipeline 300 between the host system 100 and the extension system 200, and the inlet port 5 rises accordingly, first reaching a third preset value. When the pressure on the circuit at the water storage device 23 reaches the third preset value, it means that the water storage device 23 is full of water. The booster device continues to operate, and the water purification line 2 begins to slowly produce water. The pressure in the water purification line 2, the pipeline 300 between the host system 100 and the extension system 200, and the inlet port 5 then rises again. When the pressure detected by the first pressure detection device 25 reaches a third preset value, the third preset value is less than the first preset value, and the pressure detected by the first pressure detection device 25 reaches the first preset value, the host system control unit controls the input port 1, the sterilization line 3, and the output port 4 to connect, and the water purification line 2 is disconnected. When the pressure detected by the second pressure detection device 9 reaches a second preset value, the extension system control unit controls the inlet port 5 to connect with the discharge line 6 and disconnect the water supply line 7, so that the water purification system enters the second state. The host system control unit controls the input port 1, the sterilization line 3, and the output port 4 to connect, disconnect the water purification line 2, and the extension system control unit controls the inlet port 5 to connect with the discharge line 6 and disconnect the water supply line 7. Through the above process, the water purification system switches from the first state to the second state.

[0098] In another possible embodiment, Figure 3As shown, the host system detection unit may include: a first high-pressure switch 22 or a first pressure detection device 25 disposed on the water purification line 2, capable of detecting the pressure at the output port; the host system control unit is connected to a network, and the slave system control unit is connected to the network. When the pressure at the first high-pressure switch 22 reaches a predetermined pressure value of the first high-pressure switch 22 or the pressure detected by the pressure detection device reaches a first preset value, the host system control unit controls the connection of the input port 1, the sterilization line 3, and the output port 4, and disconnects the water purification line 2; the host system control unit communicates with the slave system control unit via the network, so that the slave system control unit controls the connection of the inlet port 5 with the discharge line 6, disconnects the water supply line 7, and the water purification system enters the second state. In this embodiment, the host system 100 communicates with the slave system 200 via the network, which overcomes the problem of a large distance between the host system 100 and the slave system 200. It also allows the host system 100 and the slave system 200 to enter the second state synchronously simply by the host system 100 detecting the pressure of the water purification line 2. The above method is particularly suitable for the case where a water storage device 23 is provided in the host system.

[0099] In the above-mentioned multiple embodiments, the water storage device 23 can be a water storage barrel. Preferably, a pressure water storage barrel can be used. In this way, when the water line 7 of the extension system 200 needs water, the internal stored water can flow out by itself under the action of pressure to supply the water line 7.

[0100] In a feasible embodiment, the extension system 200 has an outlet end, the water line 7 is connected to the outlet end, and the discharge line 6 is connected to the outlet end. In this way, the water line 7 and the discharge line 6 share an outlet end to discharge water outward.

[0101] This application also proposes a water purification method, which can adopt any feasible water purification system described above, and the water purification method may include the following steps:

[0102] The control unit controls the connection between the water purification circuit 2 and the water supply circuit. In this state, the water purification circuit 2 can produce purified water to supply the water supply circuit or can supply the purified water in the water storage device 23 to the water supply circuit 7. In this step, the control unit can control the input port 1 in the host system 100, the water purification circuit 2 and the output port 4 to be connected, the sterilization circuit 3 to be disconnected, and the inlet port 5 in the extension system 200 to be connected to the water supply circuit 7, and the discharge circuit 6 to be disconnected. In this way, the purified water produced by the water purification circuit 2 or the purified water in the water storage device 23 can be delivered to the water supply circuit 7 through the pipeline 300. The control unit may include: a host system control unit, which controls the connection and disconnection of the water purification circuit 2 and the sterilization circuit 3; and an extension system control unit, which controls the connection and disconnection of the discharge circuit 6 and the water supply circuit 7.

[0103] The water supply line 7 of the extension system 200 is controlled to supply water at a second preset interval. The second preset interval can be a number of hours, for example, 7 hours, 8 hours, 12 hours, 24 hours, etc. The interval can also be variable and different each time. In this manner, if the extension system 200 is not used for a long period of time, the extension system 200 can automatically supply water to the water supply line 7. For example, some purified water can be added to the water storage mechanism 71. This step is a preferred method and can be performed optionally.

[0104] When the water line 7 stops using water, the first signal generating unit 12 generates a water circuit signal change at the output port 4. For example, the first signal generating unit 12 may be a pressure boosting device that starts working, thereby generating a water circuit signal change at the output port 4 indicating increased water pressure.

[0105] The extension system detection unit detects a change in the water path signal at the inlet port 5 , so that the discharge line 6 is connected to the inlet port 5 .

[0106] When the first preset condition is met, the sterilization circuit 3 is controlled to be connected to the output port 4 to output water with a sterilizing effect. In this embodiment, the first preset condition may be that when or after the first signal generating unit 12 of the host system 100 generates a change in the water circuit signal at the output port 4, the host system 100 itself knows that it needs to switch to the sterilization circuit 3, so it can directly control the sterilization circuit 3 to be connected to the output port 4 to output water with a sterilizing effect. The first preset condition may also be a certain time interval or a specific time point. In another embodiment, the host system 100 includes a host system detection unit. When the host system detection unit detects a change in the water circuit signal at the output port 4, the host system 100 controls the sterilization circuit 3 to be connected to the output port 4 to output water with a sterilizing effect.

[0107] For example, when the pressure at the output port 4 and the inlet port 5 of the extension system reaches a first preset value, the control unit controls the sterilization circuit 3 to connect with the discharge line 6 so that the water output from the sterilization circuit 3 is discharged through the discharge line 6. In this embodiment, the operation can be controlled after each first preset time interval, when the water supply circuit stops supplying water, that is, when the water supply circuit 7 no longer receives purified water. When the pressure at the output port 4 and the inlet port 5 of the extension system rises to the first preset value, the water purification system enters the second state, and the control unit controls the sterilization circuit 3 to connect with the discharge line 6 so that the incoming water is discharged through the discharge line 6 after electrolysis. Each first preset time interval can be a number of hours, such as 7 hours, 8 hours, 12 hours, 24 hours, etc., and the interval time can also be a variable, different each time. During this process, the incoming water is sterilized after passing through sterilization line 3. It then enters pipe 300 and ultimately reaches the discharge line 6 of extension system 200 for discharge. The electrolyzed water sterilizes pipe 300 as it passes through it. The water purification system itself can detect whether the water supply line has stopped using water through existing methods. For example, a flow sensor can be installed on the water supply line. When there is no flow in the water supply line, it indicates that the water supply line has stopped using water.

[0108] In one feasible embodiment, the host system detection unit includes a first high-pressure switch 22 disposed on the water purification line 2 and capable of detecting the pressure at the output port; the slave system detection unit includes a second high-pressure switch 8 disposed on the slave system 200 and detecting the pressure at the inlet port 5. The predetermined pressure value of the first high-pressure switch 22 is equal to the predetermined pressure value of the second high-pressure switch 8. When the pressure at the pressure point of the first high-pressure switch 22 reaches the predetermined pressure value of the first high-pressure switch 22, and the pressure at the pressure point of the second high-pressure switch 8 reaches the predetermined pressure value of the second high-pressure switch 8, indicating that water supply in the water supply line 7 has stopped, the boosting device operates to cause the pressure at the output port 4 and the slave system inlet port 5 to reach the first preset value, and the water purification system can switch from the first state to the second state. When the water purification circuit 2 also includes a water storage device 23 that can be connected to the water purification unit, and the host system detection unit also includes a third high-pressure switch 24 arranged on the circuit at the water storage device 23, when the pressure at the pressure point of the first high-pressure switch 22 reaches the preset pressure value of the first high-pressure switch 22, the pressure at the pressure point of the second high-pressure switch 8 reaches the preset pressure value of the second high-pressure switch 8, and the pressure at the pressure point of the third high-pressure switch 24 reaches the preset pressure value of the third high-pressure switch 24, it indicates that the water use circuit 7 stops using water, the boosting device continues to work, the water storage device 23 is full of purified water and no longer stores water, and the pressure at the output port 4 and the extension system inlet port 5 reaches the first preset value, the water purification system can switch from the first state to the second state.

[0109] In another feasible embodiment, the host system detection unit may include a first pressure detection device 25 disposed on the water purification line 2, capable of detecting the pressure at the output port. The slave system detection unit may include a second pressure detection device 9 disposed on the slave system 200, capable of detecting the pressure at the inlet port 5. When the pressure detected by the first pressure detection device 25 reaches a first preset value, and the pressure detected by the second pressure detection device 9 reaches a second preset value, indicating that water supply line 7 has stopped using water, the boosting device operates to cause the pressure at the output port 4 and the inlet port 5 of the slave system 200 to reach the first preset value, and the water purification system may switch from the first state to the second state. The first preset value is equal to the second preset value.

[0110] In another feasible embodiment, when the host system detection unit includes: the detection unit includes a first high-pressure switch 22 or a first pressure detection device 25 arranged on the water purification line 2 and capable of detecting the pressure at the output port; when the host system control unit is connected to the network and the extension system control unit is connected to the network, when the pressure at the pressure of the first high-pressure switch 22 reaches the predetermined pressure value of the first high-pressure switch 22 or the pressure detected by the pressure detection device reaches the first preset value, indicating that the water line 7 stops using water, the boosting device works to make the pressure at the output port 4 and the extension system inlet end 5 reach the first preset value, and the water purification system can switch from the first state to the second state.

[0111] After the sterilizing water output from the sterilization circuit 3 is discharged through the discharge circuit 6, the control unit controls the connection between the purified water circuit 2 and the discharge circuit 6, allowing the purified water to be discharged through the discharge circuit 6. In this step, when the duration of the influent water passing through the sterilization circuit 3 and being discharged through the discharge circuit 6 reaches a third preset time, which can be several minutes, for example, 2 minutes, 3 minutes, or 4 minutes, the water purification system enters a third state, and the control unit controls the connection between the purified water circuit 2 and the discharge circuit 6, allowing purified water to be produced or the purified water in the water storage device 23 to be discharged through the discharge circuit 6. During this process, the produced purified water is transported through the pipeline 300 to the discharge circuit 6 of the extension system 200 for discharge. During the discharge process, the purified water replaces and flushes the sterilizing water in the pipeline 300 that has passed through the sterilization circuit 3. This prevents the sterilizing water that has passed through the sterilization circuit 3 from being subsequently transported to the water supply circuit 7, thereby preventing any impact on users and ensuring the water safety of the water supply circuit 7.

[0112] When the duration of the clean water discharge through the discharge line 6 reaches a fourth preset time, the control unit controls the discharge line 6 to disconnect. In this embodiment, the length of the fourth preset time only needs to ensure that the amount of clean water produced by the water purification line 2 can replace the residual chlorine water with a sterilizing effect after electrolysis in the pipeline 300. It is generally a few minutes, such as 4 minutes, 5 minutes, 6 minutes, etc., and can be continuously increased and extended according to the length of the pipeline 300. When the control unit controls the discharge line 6 to disconnect, the water purification line 2 can stop water production. Preferably, when the control unit controls the discharge line 6 to disconnect, the water purification line 2 does not immediately stop water production. After a short period of time, the water pressure in the water purification line 2 increases slightly, and then stops water production. The water purification system is in a standby state. The increased water pressure needs to be lower than the water pressure in the water purification line 2 when the water purification system enters the second state. Thereafter, when the water supply line 7 is used, the water purification system enters the first state.

[0113] In this application, a water purification system is also proposed, such as Figures 1 to 3 As shown, the water purification system includes: a host system 100 with an output port 4, the host system 100 includes: a water purification line 2 and a sterilization line 3 that can be connected to the output port 4, the sterilization line 3 is used to output water with a sterilization effect; an extension system 200 with an inlet end 5, the inlet end 5 is connected to the output port 4, the extension system 200 includes: a water use line 7 and a discharge line 6 that can be connected to the inlet end 5; the difference between this water purification system and the water purification system mentioned above is that: the host system 100 also includes the host system detection unit, which is used to detect the water path signal at the output port 4; the extension system 200 includes: a second signal generating unit (not shown in the figure) that can cause the water path signal at the inlet end 5 to change; the host system 100 connects the sterilization line 3 with the output port 4 according to the change of the water path signal detected by the host system detection unit, and outputs water with a sterilization effect.

[0114] In the present application, the output port 4 of the host system 100 of the water purification system is directly connected to the inlet port 5 of the extension system 200. Therefore, when the water channel signal at the output port 4 and the water channel signal at the inlet port 5 are of the same type, the changes between the two are synchronous, that is, the change of the water channel signal at the output port 4 will inevitably cause the synchronous change of the water channel signal at the inlet port 5. For example, the water path signal can be a water pressure signal, a water flow signal, etc. The change of this type of water path signal at the output port 4 of the host system 100 is synchronized with the change at the inlet port 5 of the extension system 200. Therefore, the second signal generating unit of the extension system 200 can generate a water path signal change at the inlet port. The host system 100 can control its own system based on the host system detection unit being able to detect the same type of water path signal at the output port 4, so that the sterilization line 3 is connected to the output port 4, thus meeting the required state of the water path when the water purification system is sterilized. This avoids the need for the host system 100 and the extension system 200 to be connected with a transmission signal line or a wireless communication connection to communicate with each other so as to ensure that their respective operations can be performed synchronously. Through the above process, the host system 100 and the extension system 200 can be placed at a distance.

[0115] In the above embodiment, the extension system 200 controls its own system based on the water channel signal change generated by the second signal generating unit at the inlet end 5, so that the discharge line 6 is connected to the inlet end 5 to output water with sterilization effect.

[0116] The second signal generating unit of the extension system 200 can generate a water path signal change at the inlet port 5. For example, the second signal generating unit can generate water pressure changes, water flow changes, etc. at the inlet port 5, thereby generating a water path signal change. In a feasible embodiment, the second signal generating unit may include a boosting device, which can generate both water pressure changes and water flow changes, and the boosting device can be connected to the inlet port 5. The host system detection unit can be set at the output port 4 or at other locations, and it only needs to be able to detect the water path signal at the output port 4. The host system detection unit includes a device arranged on the host system to detect the water pressure or water flow at the output port 4, for example, it can be a first high-pressure switch 22 or a first pressure detection device 25 or a first flow detection device, etc. For another example, the second signal production unit may be to frequently open and close the water line 7 to use water in a specific pattern, so that the water line 7 generates a specific regular flow, and the host system detection unit detects the same specific regular flow at the output port 4. At this time, the host system can control its own system to connect the sterilization line 3 with the output port 4.

[0117] The water purification system may include an electronic control unit configured to control the second signal generating unit, controlling when the second signal generating unit operates, thereby causing a change in the water circuit signal at the inlet end 5. For example, when the water circuit 7 stops using water, the electronic control unit may control the second signal generating unit to operate, thereby causing an increase in pressure or a change in flow at the inlet end 5 of the extension system 200.

[0118] The water purification system also includes a control unit that controls the connection and disconnection between the water purification line 2, the sterilization line 3, the discharge line 6, and the water use line 7. The control unit can be the same as the control unit structure mentioned above. The water purification system has at least two states: in the first state, the water purification line 2 is connected to the water use line 7; in the second state, the sterilization line 3 is connected to the discharge line 6 so that the water output from the sterilization line 3 is discharged through the discharge line 6; based on the changes in the water path signal generated by the second signal generating unit at the inlet end 5 and the changes in the water path signal detected by the host system detection unit, the control unit controls the water purification system to switch from the first state to the second state.

[0119] The control unit includes: a host system control unit, which controls the connection and disconnection of the water purification line 2 and the sterilization line 3. According to the change of the water path signal detected by the host system detection unit, the host system control unit controls the connection of the water purification line 2 with the output port 4 to switch the connection of the sterilization line 3 with the output port 4, and the water output by the sterilization line 3 is output through the output port 4; an extension system control unit, which controls the connection and disconnection of the discharge line 6 and the water use line 7. When a second preset condition is met, the extension system control unit controls the discharge line 6 to be connected to the inlet port 5 and the water use line 7 to be disconnected, so that the incoming water is discharged through the discharge line 6. The second preset condition can be when or after the second signal generating unit generates a change in the water path signal at the inlet port 5, or it can be a certain interval or a specific time point.

[0120] Preferably, the extension system 200 may include an extension system detection unit configured to detect a water circuit signal at the inlet end 5. Based on changes in the water circuit signal detected by the extension system detection unit, the extension system 200 connects the discharge line 6 to the inlet end 5 and disconnects the water circuit 7, thereby allowing the incoming water to be discharged through the discharge line 6. Similarly, the extension system detection unit may be a device configured to detect the water pressure or flow rate at the inlet end 5, such as a second high-pressure switch 8, a second pressure detection device 9, or a second flow detection device.

[0121] Similarly, the water purification system also has a third state. In the third state, the water purification line 2 is connected to the discharge line 6, the host system control unit controls the input port 1, the water purification line 2 and the output port 4 to be connected, the sterilization line 3 is disconnected, and the extension system control unit controls the inlet port 5 to be connected to the discharge line 6, and the water use line 7 is disconnected.

[0122] In one specific embodiment, the second signal generating unit includes a pressure boosting device; and the host system detection unit includes a first high-pressure switch 22 or a first pressure detection device 25 disposed on the water purification circuit 2 and capable of detecting the pressure at the output port 4. In a first state, the water purification circuit 2 is producing water, and the water supply circuit 7 receives the purified water produced by the water purification circuit 2, for example, to store or directly use the purified water. Consequently, the pressures at the water purification circuit 2, the pipeline 300 between the host system 100 and the extension system 200, and the inlet port 5 are all relatively low. When the water supply circuit 7 is no longer being used, the pressure boosting device operates, causing the pressure at the inlet port 5 to increase, and the pressure at the output port 4 to increase simultaneously. When the pressure at the first high-pressure switch 22 reaches a predetermined pressure value of the first high-pressure switch 22, or when the pressure detected by the first pressure detection device 25 reaches a first preset value, this indicates that the water supply circuit 7 has stopped producing water. The host system then connects the sterilization circuit 3 to the output port 4, disconnecting the water purification circuit 2. Because the pressure at the inlet port 5 increases due to its own operation, the extension system 200 automatically knows that it needs to switch the connection between the discharge line 6 and the inlet port 5 and disconnect the water supply line 7. In this way, the water purification system can switch from the first state to the second state. The predetermined pressure value and the second predetermined pressure value of the first high-pressure switch 22 can be greater than the pressure in the pipeline 300 when the water purification line 2 is in the water production state and the water supply line 7 is receiving the purified water produced by the water purification line 2.

[0123] Preferably, the extension system detection unit includes a second high-pressure switch 8 or a second pressure detection device 9 provided on the extension system 200 for detecting the pressure at the inlet end 5. When the pressure at the second high-pressure switch 8 reaches the predetermined pressure value of the second high-pressure switch 8, or when the pressure detected by the second pressure detection device 9 reaches the second predetermined value, it indicates that the water supply line 7 stops using water, and the extension system 200 connects the discharge line 6 to the inlet end 5, and disconnects the water supply line 7. This is another way for the host system 100 to switch itself, so that the water purification system can switch from the first state to the second state. The predetermined pressure value of the first high-pressure switch 22 can be equal to the predetermined pressure value of the second high-pressure switch 8, and the first predetermined value is equal to the second predetermined value. In the above embodiment, since the host system 100 and the slave system 200 are far apart, direct wiring is not possible between them for communication. Instead, the host system 100 and the slave system 200 measure the pressure at the output port of the water purification line 2 and the pressure at the inlet port 5 of the slave system 200 through their respective first high-pressure switches 22 and second high-pressure switches 8 or first pressure detection devices 25 and second pressure detection devices 9, thereby achieving synchronous entry of the host system 100 and the slave system 200 into the second state. This avoids the need for communication wiring between the host system 100 and the slave system 200 for synchronous control.

[0124] In the above process, the control unit may include: a host system control unit and an extension system control unit; when the pressure at the first high-pressure switch 22 reaches the preset pressure value of the first high-pressure switch 22, the host system control unit controls the input port 1, the sterilization line 3 and the output port 4 to be connected, and the water purification line 2 is disconnected; when the pressure at the second high-pressure switch 8 reaches the preset pressure value of the second high-pressure switch 8, the extension system control unit controls the inlet port 5 to be connected with the discharge line 6, and the water use line 7 is disconnected.

[0125] In this embodiment, other structures of the water purification system can refer to the above description and will not be repeated here.

[0126] This application also proposes a water purification method using the above-mentioned water purification system, which may include the following steps:

[0127] The control unit controls the water purification circuit 2 to be connected to the water use circuit 7 .

[0128] When the water line 7 stops using water, the second signal generating unit generates a water circuit signal change at the inlet end 5. For example, the second signal generating unit may be a pressure boosting device that starts working, thereby generating a water circuit signal change at the inlet end 5 indicating increased water pressure.

[0129] The host system detection unit detects the change of the water channel signal at the output port 4, so that the sterilization line 3 is connected to the output port 4, and water with sterilization effect is output.

[0130] When the second preset condition is met, the discharge line 6 is controlled to be connected to the inlet port 5. In this embodiment, after the second signal generating unit of the extension system 200 generates a change in the water path signal at the inlet port 5, the extension system 200 itself knows that it needs to switch to the discharge line 6, so it can directly control the discharge line 6 to be connected to the inlet port 5 to output water with a sterilizing effect. The second preset condition can be when or after the second signal generating unit generates a change in the water path signal at the inlet port 5, or it can be at a certain interval or a specific time point. In another embodiment, the extension system 200 includes an extension system detection unit. When the extension system detection unit detects a change in the water path signal at the inlet port 5, the host system controls the discharge line 6 to be connected to the inlet port 5.

[0131] After the sterilizing water output from the sterilization circuit 3 is discharged through the discharge circuit 6, the control unit controls the connection between the clean water circuit 2 and the discharge circuit 6, allowing the clean water to be discharged through the discharge circuit 6. In this step, when the duration of the incoming water passing through the sterilization circuit 3 and being discharged through the discharge circuit 6 reaches a third preset time, which can be several minutes, the water purification system enters a third state, and the control unit controls the connection between the clean water circuit 2 and the discharge circuit 6, allowing the production of purified water or the output of purified water from the water storage device 23, allowing the purified water to be discharged through the discharge circuit 6.

[0132] When the duration of the purified water being discharged through the discharge line 6 reaches a fourth preset time, the control unit controls the discharge line 6 to be disconnected. In this embodiment, the length of the fourth preset time only needs to ensure that the amount of purified water produced by the water purification line 2 can replace the sterilizing water remaining in the pipeline 300 after passing through the sterilization line 3.

[0133] 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.

[0134] 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 each other. The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water purification system, characterized in that: The water purification system comprises: A host system having an output port, the host system comprising: a water purification circuit and a sterilization circuit capable of communicating with the output port, the sterilization circuit being configured to output sterilizing water; and a first signal generating unit capable of causing a change in a water circuit signal at the output port; the host system controlling itself when a first preset condition is met to connect the sterilization circuit to the output port to output sterilizing water; An extension system having an inlet end, the inlet end being connected to the output port, the extension system comprising: a water supply line and a discharge line capable of being connected to the inlet end; an extension system detection unit, configured to detect a water signal at the inlet end; the water signal comprising at least one of the following: a water pressure signal and a water flow signal; The extension system connects the discharge line to the inlet end according to the change of the water channel signal detected by the extension system detection unit; The water purification system also includes a control unit that controls the connection and disconnection between the water purification circuit, the sterilization circuit, the discharge circuit, and the water use circuit; the water purification system has at least two states: in the first state, the water purification circuit is connected to the water use circuit; in the second state, the sterilization circuit is connected to the discharge circuit so that the water output by the sterilization circuit is discharged through the discharge circuit; based on the first preset condition and the change of the water circuit signal detected by the extension system detection unit, the control unit controls the water purification system to switch from the first state to the second state.

2. The water purification system according to claim 1, characterized in that: The water purification system further has a third state, in which the water purification line is connected to the discharge line.

3. The water purification system according to claim 1, characterized in that: The control unit includes: a host system control unit, which controls the on-off of the water purification circuit and the sterilization circuit. According to the first preset condition, the host system control unit controls the water purification circuit to be connected to the output port and switches the purified water output to the sterilization circuit to be connected to the output port, and the water output from the sterilization circuit is output through the output port; an extension system control unit, which controls the on-off of the discharge circuit and the water use circuit. According to the change of the water circuit signal detected by the extension system detection unit, the extension system control unit controls the discharge circuit to be connected to the inlet end and the water use circuit to be disconnected, so that the incoming water is discharged through the discharge circuit.

4. The water purification system according to claim 1, characterized in that: The host system has an input port, and the control unit includes: a host system control unit, which controls the on and off of the water purification circuit and the sterilization circuit; an extension system control unit, which controls the on and off of the discharge circuit and the water use circuit; in a first state, the host system control unit controls the input port, the water purification circuit and the output port to be connected, and the sterilization circuit to be disconnected, and the extension system control unit controls the inlet end to be connected to the water use circuit, and the discharge circuit to be disconnected; in a second state, the host system control unit controls the input port, the sterilization circuit and the output port to be connected, and the water purification circuit to be disconnected, and the extension system control unit controls the inlet end to be connected to the discharge circuit, and the water use circuit to be disconnected.

5. The water purification system according to claim 4, characterized in that: The water purification system also has a third state. In the third state, the water purification line is connected to the discharge line, the host system control unit controls the input port, the water purification line and the output port to be connected, and the sterilization line is disconnected, and the extension system control unit controls the inlet end to be connected to the discharge line, and the water use line is disconnected.

6. The water purification system according to claim 1, characterized in that: The extension system detection unit includes a device capable of detecting water pressure or a device capable of detecting water flow.

7. The water purification system according to claim 1, characterized in that: The first signal generating unit includes a pressure boosting device; the extension system detection unit includes a second high-pressure switch or a second pressure detection device provided on the extension system to detect the pressure at the inlet end.

8. The water purification system according to claim 1, characterized in that: The host system also includes a host system detection unit, which is used to detect the water channel signal at the output port. The host system connects the sterilization circuit with the output port according to the change of the water channel signal detected by the host system detection unit, and the sterilization circuit outputs water with sterilization effect.

9. The water purification system according to claim 8, characterized in that: The extension system detection unit includes a device capable of detecting water pressure or a device capable of detecting water flow.

10. The water purification system according to claim 8, characterized in that: The first signal generating unit includes a pressure boosting device; the host system detection unit includes a first high-pressure switch provided on the water purification line and capable of detecting the pressure at the output port; the extension system detection unit includes a second high-pressure switch provided on the extension system and capable of detecting the pressure at the inlet port, wherein the predetermined pressure value of the first high-pressure switch is equal to the predetermined pressure value of the second high-pressure switch; The host system has an input port, and the water purification system further includes a control unit, which includes: a host system control unit and a slave system control unit; When the pressure at the first high-pressure switch reaches the preset pressure value of the first high-pressure switch, the host system control unit controls the input port, the sterilization circuit and the output port to be connected, and the water purification circuit is disconnected; when the pressure at the second high-pressure switch reaches the preset pressure value of the second high-pressure switch, the extension system control unit controls the inlet port to be connected with the discharge circuit, and the water use circuit is disconnected.

11. The water purification system according to claim 10, characterized in that: The water purification circuit also includes a water storage device that can be connected to the water purification unit; The host system detection unit further includes a third high-pressure switch provided on a circuit at the water storage device, wherein a predetermined pressure value of the third high-pressure switch is smaller than a predetermined pressure value of the first high-pressure switch.

12. The water purification system according to claim 11, characterized in that: When the pressure at the first high-pressure switch reaches the preset pressure value of the first high-pressure switch, the pressure at the second high-pressure switch reaches the preset pressure value of the second high-pressure switch, and the pressure at the third high-pressure switch reaches the preset pressure value of the third high-pressure switch, the host system control unit controls the water purification circuit to be connected to the output port and switches the purified water output to be connected to the sterilization circuit and the output port, and the water output by the sterilization circuit is output through the output port, and the extension system control unit controls the water use circuit to be connected to the inlet end and switches to be connected to the discharge circuit and the inlet end, so that the incoming water is discharged through the discharge circuit.

13. The water purification system according to claim 8, characterized in that The host system has an input port, the first signal generating unit includes a pressurizing device; the host system detection unit includes a first pressure detection device provided on the water purification circuit and capable of detecting the pressure at the output port; the slave system detection unit includes a second pressure detection device provided on the slave system to detect the pressure at the inlet end, when the pressure detected by the first pressure detection device reaches a first preset value, the host system control unit controls the input port, the sterilization circuit, and the output port to be connected, and the water purification circuit to be disconnected; When the pressure detected by the second pressure detection device reaches a second preset value, the first preset value is equal to the second preset value, and the extension system control unit controls the inlet end to be connected to the discharge line and the water line is disconnected.

14. The water purification system according to claim 13, characterized in that: The water purification circuit also includes a water storage device that can be connected to the water purification unit; after the pressure detected by the first pressure detection device reaches a third preset value, the third preset value is less than the first preset value. When the pressure detected by the first pressure detection device reaches the first preset value, the host system control unit controls the input port, the sterilization circuit and the output port to be connected, and the water purification circuit is disconnected; when the pressure detected by the second pressure detection device reaches a second preset value, the extension system control unit controls the inlet end to be connected to the discharge circuit, and the water use circuit is disconnected.

15. The water purification system according to claim 1, characterized in that: The sterilization circuit includes: an electrolysis sterilization module, which is used to hydrolyze water for sterilization; the water use circuit at least includes: a water storage mechanism for supplying water to users.

16. The water purification system according to claim 10 or 13, characterized in that: The water purification circuit includes a water purification unit, which includes one of a reverse osmosis membrane filtration unit and a nanofiltration membrane filtration unit; the water purification system also includes: an electronic control unit, which controls the boosting device to continue working when the water supply circuit stops using water, so that the pressure downstream of the boosting device in the water purification circuit and the extension system increases.

17. The water purification system according to claim 16, characterized in that: The water purification unit further includes a microfiltration activated carbon composite filter element connected to the downstream of the reverse osmosis membrane filtration unit or the nanofiltration membrane filtration unit, and one end of the sterilization circuit is connected to the downstream of the microfiltration activated carbon composite filter element.

18. The water purification system according to claim 1, characterized in that: The extension system has an outlet end, the water supply line is connected to the outlet end, and the discharge line is connected to the outlet end.

19. A water purification method using the water purification system according to any one of claims 1 to 18, characterized in that: The water purification method comprises: The control unit controls the water purification circuit to be connected to the water use circuit; When the water supply line stops using water, the first signal generating unit generates a water supply signal change at the output port; The extension system detection unit detects a change in the water path signal at the inlet end, so as to connect the discharge line with the inlet end.

20. The water purification method according to claim 19, characterized in that The water purification method further includes: when a first preset condition is met, controlling the sterilization circuit to communicate with the output port to output water with a sterilization effect.

21. The water purification method according to claim 19, characterized in that The host system further includes a host system detection unit, which is used to detect the water channel signal at the output port; The water purification method further includes: the host system detection unit detects a change in the water channel signal at the output port, and controls the sterilization circuit to be connected to the output port to output water with a sterilization effect.

22. The water purification method according to claim 20 or 21, characterized in that: The water purification method further comprises: After the sterilizing water outputted from the sterilization circuit is discharged through the discharge circuit, the clean water circuit is controlled to be connected to the discharge circuit so that the clean water is discharged through the discharge circuit.

23. The water purification method according to claim 21, characterized in that The first signal generating unit includes a pressure boosting device; the host system detection unit includes a first high-pressure switch provided on the water purification line and capable of detecting the pressure at the output port; the extension system detection unit includes a second high-pressure switch provided on the extension system and capable of detecting the pressure at the inlet port, wherein the predetermined pressure value of the first high-pressure switch is equal to the predetermined pressure value of the second high-pressure switch; When the pressure at the first high-pressure switch reaches the preset pressure value of the first high-pressure switch and the pressure at the second high-pressure switch reaches the preset pressure value of the second high-pressure switch, indicating that the water circuit stops using water, the extension system detection unit detects the change of the water circuit signal at the inlet end and the host system detection unit detects the change of the water circuit signal at the output port.

24. The water purification method according to claim 23, characterized in that After each first preset time interval, when the water circuit stops using water, the boosting device is controlled to work, and when the pressure at the output port and the inlet end of the extension system reaches the predetermined pressure value of the first high-pressure switch, the sterilization circuit is controlled to be connected to the discharge circuit so that the water output from the sterilization circuit is discharged through the discharge circuit.

25. The water purification method according to claim 22, characterized in that When the duration of the electrolyzed influent being discharged through the discharge line reaches a third preset time, the control unit controls the purified water line to be connected to the discharge line so that the purified water is discharged through the discharge line; The water purification method further comprises: When the duration for which the clean water is discharged through the discharge line reaches a fourth preset time, the control unit controls the discharge line to be disconnected.

26. A water purification system, characterized in that: The water purification system comprises: A host system having an output port, the host system comprising: a water purification circuit and a sterilization circuit capable of communicating with the output port, the sterilization circuit being configured to output sterilizing water; a host system detection unit configured to detect a water circuit signal at the output port; the water circuit signal comprising at least one of the following: a water pressure signal and a water flow signal; An extension system having an inlet end, the inlet end being connected to the output port, the extension system comprising: a water supply line and a discharge line capable of being connected to the inlet end; a second signal generating unit capable of generating a change in a water supply signal at the inlet end; the extension system controlling itself when a second preset condition is met, so that the discharge line is connected to the inlet end to output water having a sterilizing effect; The host system connects the sterilization circuit to the output port according to the change of the water circuit signal detected by the host system detection unit, and outputs water with sterilization effect; The water purification system also includes a control unit that controls the connection and disconnection between the water purification circuit, the sterilization circuit, the discharge circuit, and the water use circuit; the water purification system has at least two states: in the first state, the water purification circuit is connected to the water use circuit; in the second state, the sterilization circuit is connected to the discharge circuit so that the water output by the sterilization circuit is discharged through the discharge circuit; based on the second preset condition and the change of the water circuit signal detected by the host system detection unit, the control unit controls the water purification system to switch from the first state to the second state.

27. The water purification system according to claim 26, characterized in that The water purification system further has a third state, in which the water purification line is connected to the discharge line.

28. The water purification system according to claim 26, characterized in that The second signal generating unit includes a pressure boosting device; the host system detection unit includes a first high-voltage switch or a first pressure detection device provided on the host system for detecting the pressure at the output port.

29. A water purification method using the water purification system according to any one of claims 26 to 28, characterized in that: The water purification method comprises: The control unit controls the water purification circuit to be connected to the water use circuit; When the water supply line stops using water, the second signal generating unit generates a water supply signal change at the inlet end; The host system detection unit detects the change of the water channel signal at the output port, so that the sterilization circuit is connected to the output port and outputs water with sterilization effect.

30. The water purification method according to claim 29, characterized in that The extension system further includes an extension system detection unit, which is used to detect the waterway signal at the inlet end; The water purification method further includes: the extension system detection unit detects a change in the water channel signal at the inlet end, and controls the discharge line to be connected to the inlet end.

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