Water purification system

Abstract

The utility model relates to the technical field of water treatment, in particular to a water purification system. The water purification system comprises a main machine capable of purifying water entering from a water inlet end of the main machine; the extension set can output water purified by the main machine, and the water supply pipeline is communicated with the main machine and the extension set. The main machine comprises a front filter element, a first water pump, a fine filter element, a pressure container and a second water pump which are communicated in sequence; the first end of the first flushing pipeline is located between the second water pump and the water outlet end of the main machine, and the second end of the first flushing pipeline is located on the upstream or the downstream of the front filter element. The second water pump and the first flushing pipeline are additionally arranged in front of the water outlet end of the main machine, high-pressure flushing is carried out on the front filter element, efficient flushing of the filter element in the main machine is improved, and the water quality is improved.

Description

Technical Field

[0001] This specification relates to the field of water treatment technology, and in particular to a water purification system. Background Art

[0002] Commercial water purifiers typically utilize a centralized model, consisting of a central purifier (main unit) and connected units (subunits) via pipes. These units are separated, allowing different units to be installed in different areas where people need water. The main unit primarily provides purified water; the subunits themselves do not purify water. Instead, they receive purified water from the main unit and store it in a water storage unit. When people need purified water, they can directly access it from the subunits.

[0003] After the filter element in the host is used for a long time, the flow rate will decrease. How to efficiently flush the filter element of the host is an urgent problem to be solved. Utility Model Content

[0004] In order to solve the problems in the prior art, an embodiment of this specification provides a water purification system, which completes the flushing of the filter element in the main unit by adding a water pump and a flushing pipeline to the main unit.

[0005] The embodiment of this specification provides a water purification system, comprising:

[0006] A main unit capable of purifying water entering from the main unit's water inlet; at least one extension unit capable of outputting water purified by the main unit, and a water supply pipeline connecting the main unit and the extension unit;

[0007] The host comprises:

[0008] The pre-filter element, the first water pump, the fine filter element, the pressure vessel and the second water pump are connected in sequence;

[0009] A first flushing pipeline, wherein the first end of the first flushing pipeline is located between the second water pump and the water outlet of the main unit, and the second end of the first flushing pipeline is located upstream or downstream of the pre-filter element.

[0010] As a further aspect of this specification, the second water pump can drive the water flowing out of the pressure vessel to flow into the first end of the first flushing pipeline. After the water driven by the second water pump flows out from the second end of the first flushing pipeline through the first flushing valve, it flows into the pre-filter element to flush the pre-filter element.

[0011] As another further aspect of this specification, the second end of the first flushing pipeline is located between the water inlet end of the main unit and the water inlet end of the pre-filter; or,

[0012] The second end of the first flushing pipeline is located between the water outlet end of the pre-filter element and the water inlet end of the pressure container.

[0013] As another further aspect of the present specification, the second end of the first flushing pipeline is located between the water outlet end of the pre-filter and the water inlet end of the first water pump.

[0014] As another further aspect of this specification, the main unit further includes a first drainage pipeline connected to the water inlet end of the pre-filter element or the water outlet end of the pre-filter element;

[0015] The main unit further includes a first drain valve, which is located in the first drain pipeline;

[0016] The water flowing out from the second end of the first flushing pipeline flows into the pre-filter element for flushing and is then discharged from the first drainage pipeline.

[0017] As another further aspect of the present specification, the host further includes a flushing detection unit located in the first drainage pipe, for detecting water in the first drainage pipe.

[0018] As another further aspect of this specification, the second end of the first flushing pipeline is located between the water outlet end of the pre-filter and the water inlet end of the first water pump;

[0019] The second water pump can drive the water flowing out of the pressure vessel to flow into the first end of the first flushing pipeline. The water driven by the second water pump flows out of the second end of the first flushing pipeline through the first flushing valve and then flows into the first water pump.

[0020] The water driven by the second water pump and the first water pump flushes the fine filter element and is discharged through the second drainage pipeline.

[0021] As another further aspect of this specification, the main unit further comprises a post-filter element, wherein the post-filter element is located between the fine filter element and the pressure vessel;

[0022] The host further includes a high-pressure switch, which is located between the pressure vessel and the second water pump and is used to detect the pressure at the water outlet of the pressure vessel.

[0023] As another further aspect of this specification, the water outlet of the main unit is connected to at least one of the extension units via the water supply pipeline;

[0024] The main unit further includes a water return end, through which the water supply pipeline returns the water in the water supply pipeline to the main unit;

[0025] The main unit further includes a return water pipeline, a first end of the return water pipeline is connected to the return water end, and a second end of the return water pipeline is located upstream of the second water pump;

[0026] The main unit further includes a return valve located in the return pipeline.

[0027] As another further aspect of this specification, the second end of the return water pipeline is connected to the water inlet end of the second water pump.

[0028] As another further aspect of this specification, the host further includes a water purification unit and / or a sterilization unit, which is located in the return water pipeline, or between the second end of the return water pipeline and the water outlet end of the host.

[0029] As another further aspect of the present specification, the water purification unit and / or the sterilization unit is located between the second water pump and the water outlet of the main unit.

[0030] As another further aspect of the present specification, the water purification unit and / or the sterilization unit is located between the first end of the first flushing pipeline and the water outlet end of the main unit.

[0031] As another further aspect of this specification, the water purification unit comprises at least one or a combination of granular carbon, carbon rods or carbon fibers;

[0032] The sterilization unit includes at least one of an ultraviolet sterilization unit, an ozone module, a bromine resin module or a chlorine resin module, or a combination of multiple thereof.

[0033] As another further aspect of this specification, when the sterilization unit includes an ultraviolet sterilization unit and / or an ozone module, the host also includes a water flow sensor located upstream of the ultraviolet sterilization unit and / or the ozone module, which is used to control the opening and closing of the ultraviolet sterilization unit and / or the ozone module according to the water flow.

[0034] As another further aspect of this specification, the main unit further includes a detection unit located between the second end of the return water pipe and the water outlet end of the main unit.

[0035] As another further aspect of the present specification, the detection unit includes a flow meter, a timer, a TDS probe, or a pressure sensor, or a combination of one or more of the above.

[0036] As another further aspect of the present specification, the second water pump drives the water in the water supply pipeline and the water return pipeline to circulate in the water supply pipeline and the water return pipeline.

[0037] As another further aspect of this specification, the main unit further includes a second flushing pipeline, wherein a first end of the second flushing pipeline is located in the return pipeline, and a second end of the second flushing pipeline is located between the first water pump and the second end of the return pipeline;

[0038] The main unit further includes a second flushing valve located in the second flushing pipeline;

[0039] The main unit further includes a third drainage pipeline connected to the return water pipeline;

[0040] The main unit further includes a third drain valve, which is located in the third drain pipeline;

[0041] Driven by the first water pump and the second water pump, the water in the return pipe and the water supply pipe is discharged through the third drainage pipe.

[0042] As another further aspect of the present specification, the second end of the second flushing pipeline is connected between the water outlet end of the first water pump and the water inlet end of the fine filter element.

[0043] By using the embodiment of this specification, by adding a second water pump and a first flushing pipeline before the water outlet of the main unit, high-pressure flushing of the pre-filter element is performed, thereby improving the efficient flushing of the filter element in the main unit and improving the water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 The figure shows the overall structure of a water purification system according to an embodiment of this specification;

[0046] Figure 2 The figure shows a schematic diagram of the specific structure of a water purification system according to an embodiment of this specification;

[0047] Figure 3 Shown is a schematic diagram of the specific structure of another water purification system according to an embodiment of this specification;

[0048] Figure 4 Shown is another structural schematic diagram of a water purification system according to an embodiment of this specification;

[0049] Figure 5 Shown is another structural schematic diagram of a water purification system according to an embodiment of this specification;

[0050] Figure 6 Shown is another structural schematic diagram of a water purification system according to an embodiment of this specification.

[0051] [Description of Reference Numerals]

[0052] 100, main unit; 200, water supply pipeline; 300, extension unit;

[0053] 101. Pre-filter element; 102. First water pump; 103. Fine filter element; 104. Pressure vessel; 105. Second water pump; 106. First flushing line; 1061. First end of first flushing line; 1062. Second end of first flushing line; 1063. First flushing valve; 1064. First one-way valve; 107. Water inlet valve; 108. Second one-way valve; 109. Second drain line; 1091. Combination valve for second drain line; 110. First drain line; 1101. First drain valve for first drain line; 1102. Third one-way valve; 1103. Flushing detection unit; 111. High-pressure switch; 112. Post-filter element; 113 , the return water end of the main unit; 114, the return water pipeline; 1141, the first end of the return water pipeline; 1142, the second end of the return water pipeline; 1143, the return water valve; 1144, the one-way valve of the return water pipeline; 115, the water purification unit; 116, the sterilization unit; 117, the water flow sensor; 118, the detection unit; 119, the second flushing pipeline; 1191, the first end of the second flushing pipeline; 1192, the second end of the second flushing pipeline; 1193, the second flushing valve of the second flushing pipeline; 1194, the one-way valve of the second flushing pipeline; 120, the third drain pipeline; 1201, the third drain valve of the third drain pipeline; 1202, the one-way valve of the third drain pipeline. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the embodiments described are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this specification.

[0055] like Figure 1Shown is an overall structural diagram of a water purification system according to an embodiment of the present specification, which describes a main unit 100 capable of purifying water entering from the water inlet end of the main unit; at least one extension unit 300 capable of outputting water purified by the main unit, and a water supply pipe 200 connecting the main unit and the extension unit; the water inlet end of the water purification system is connected to a water supply source, which can be municipal tap water or other water supply sources, and the main unit 100 includes a pre-filter element 101, a first water pump 102, a fine filter element 103, a pressure vessel 104, a second water pump 105, a first flushing pipe 106, a first end 1061 of the first flushing pipe, and a second end 1062 of the first flushing pipe.

[0056] The pre-filter element 101, the first water pump 102, the fine filter element 103, the pressure vessel 104 and the second water pump 105 are connected in sequence, the first end 1061 of the first flushing pipeline is located between the second water pump 105 and the water outlet end of the main unit, and the second end 1062 of the first flushing pipeline is located upstream or downstream of the pre-filter element 101.

[0057] The pre-filter is the first coarse filter for the water source, filtering out large particles such as silt, rust, insect eggs, and bloodworms. The pre-filter can include a single pre-filter or multiple pre-filters connected in parallel, such as two pre-filters connected in parallel. The two pre-filters filter the water flowing from the main unit, and then the water flows out through the outlet ports of the two pre-filters to the next device after the pre-filter, such as a second water pump.

[0058] In other embodiments, the pre-filter element may also include other functions and structures, which are not limited here.

[0059] The second end of the first flushing pipeline is located upstream or downstream of the pre-filter element, which means that the water flowing out through the first flushing pipeline can flow into the pre-filter element from one side, flow through the pre-filter element to flush it, and flow out from the other side of the pre-filter element, thereby completing the flushing of the pre-filter element. When the water flowing out of the second end of the first flushing pipeline flows into the water inlet end of the pre-filter element and flows out from the water outlet end of the pre-filter element, the second end of the first flushing pipeline is located upstream of the pre-filter element; when the water flowing out of the second end of the first flushing pipeline flows into the water outlet end of the pre-filter element and flows out from the water inlet end of the pre-filter element, the second end of the first flushing pipeline is located downstream of the pre-filter element.

[0060] Through the embodiments of this specification, the pressurized water after the second water pump flows into the first flushing pipeline to flush the pre-filter element, which can increase the water pressure of the flushing water and achieve a better flushing effect on the pre-filter element; when the pressurization effect of the first water pump and / or pressure vessel on the water is superimposed on the pressurization effect of the second water pump on the water in the first flushing pipeline, the flushing water pressure of the first flushing pipeline is higher, which can further increase the water pressure for flushing the pre-filter element and improve the flushing effect; and the water used for flushing is cleaner, further improving the flushing effect.

[0061] like Figure 2 The figure shows a schematic diagram of the specific structure of a water purification system according to an embodiment of the present specification. In the embodiment of the figure, the system includes a main unit 100, a water supply pipeline 200, and an extension unit 300. The main unit 100 includes a pre-filter element 101, a first water pump 102, a fine filter element 103, a pressure vessel 104, a second water pump 105, a first flushing pipeline 106, a first end 1061 of the first flushing pipeline, a second end 1062 of the first flushing pipeline, a first flushing valve 1063, and a first one-way valve 1064; the system also includes a water inlet valve 107, a second one-way valve 108, a second drain pipeline 109, a combination valve 1091 of the second drain pipeline, a first drain pipeline 110, a first drain valve 1101 of the first drain pipeline, a third one-way valve 1102, a flushing detection unit 1103, a high-pressure switch 111, and a post-filter element 112.

[0062] The water inlet end of the main unit 100 of the water purification system of the embodiment of this specification is connected to the water supply source, and the water from the water supply source flows into the main unit 100 through the water inlet end of the main unit 100. The water flows into the pre-filter element 101 after passing through the water inlet valve 107. The water filtered by the pre-filter element 101 flows into the first water pump 102, and flows into the fine filter element 103 after being pressurized by the first water pump 102. The fine filter element 103 may include a reverse osmosis filter element (RO membrane filter element), a nanofiltration membrane filter element, etc. The fine filter element 103 is connected to the second row The water pipe 109, the second drainage pipe 109 also has a combination valve 1091, the combination valve 1091 can be used to adjust the wastewater ratio generated by the fine filter 103, and can control the wastewater in the second drainage pipe 109 to be discharged from the host 100; the water filtered by the fine filter 103 flows into the post filter 112, the post filter further filters the water and then flows into the pressure container 104, the pressure container 104 can be a pressure barrel, the pressure container 104 can be pressurized The water filtered upstream can be stored, for example, at a pressure of 3 kg. The high-pressure switch 111 detects the pressure of the pressure vessel 104. When the pressure in the pressure vessel 104 reaches a preset value, the high-pressure switch 111 outputs a control instruction to stop the water production of the host. The water pressurized in the pressure vessel 104 passes through the second one-way valve 108, which ensures that the water flowing out of the pressure vessel 104 does not flow back. The water passing through the second one-way valve 108 flows into the second water pump 105. The water pressurized by the second water pump 105 can be directly output to the water outlet of the host 100 and flow into the extension 300 through the water supply pipeline 200 to provide purified water to the user. The water pressurized by the second water pump 105 can also flow into the first flushing pipeline 106 through the first end 1061 of the first flushing pipeline under the action of the first flushing valve 1063 and the first one-way valve 1064. The first one-way valve 1064 can ensure that the water in the first flushing pipeline 106 does not flow back.

[0063] In this embodiment, the second water pump 105 can drive the water flowing out of the pressure vessel 104 to flow into the first end 1061 of the first flushing pipeline. After the water driven by the second water pump 105 flows out from the second end 1062 of the first flushing pipeline through the first flushing valve 1063, it flows into the pre-filter element 101 to flush the pre-filter element 101.

[0064] In this embodiment, the pre-filter element 101 can be flushed by opening the first flush valve 1063, opening the first drain valve 1101 of the first drain line, closing the water inlet valve 107, and closing the combination valve 1091 of the second drain line. The second end 1062 of the first flush line is located between the water outlet of the pre-filter element 101 and the water inlet of the first water pump 102. Alternatively, in another embodiment, the second end 1062 of the first flush line can also be located between the water outlet of the first water pump 102 and the water inlet of the fine filter element 103. Alternatively, in another embodiment, the second end 1062 of the first flush line can also be located between the water outlet of the fine filter element and the water inlet of the post-filter element 112. Alternatively, in another embodiment, the second end 1062 of the first flush line can also be located between the water outlet of the post-filter element 112 and the water inlet of the pressure vessel 104. The water in the first flushing pipeline 106 flows directly or indirectly (through other equipment or components, such as the first water pump 102 ) into the water outlet of the pre-filter element 101 to achieve reverse flushing of the pre-filter element 101 . In this embodiment, the first drainage pipe 110 is located upstream of the water inlet end of the pre-filter 101, for example, between the water inlet valve 107 of the host 100 and the water inlet end of the pre-filter 101, and the first drainage pipe 110 discharges the water for reverse flushing the pre-filter 101 from the host, wherein the third one-way valve 1102 in the first drainage pipe 110 can ensure that the water in the first drainage pipe 110 will not flow back into the pre-filter 101. When the first drainage valve 1101 of the first drainage pipe and the first flushing valve 1063 in the first flushing pipe 106 are both opened, the first flushing pipe 106 and the first drainage pipe 110 can be connected, so that the water pressurized by the second water pump 105 (or including the first water pump 102, the pressure vessel 104 and the second water pump 105) can enter the first flushing pipe 106 and then flow along Figure 2 The water flows into the outlet end of the pre-filter element 101 in the direction of the dotted arrow to backwash the pre-filter element 101, and flows out from the water inlet end of the pre-filter element 101 and is discharged through the first drainage pipe 110, thereby completing the backwashing of the pre-filter element 101.

[0065] In another embodiment, the second end 1062 of the first flushing pipeline can also be located between the water inlet end of the pre-filter 101 and the water inlet valve 107, and the first drain pipeline 110 is connected downstream of the pre-filter 101, for example, the first drain pipeline 110 is connected between the water outlet end of the pre-filter 101 and the water inlet end of the first water pump 102. The water in the first flushing pipeline 106 flows into the pre-filter 101 through the water inlet end of the pre-filter 101, and the water under the boost pressure of the second water pump 105 (or including the first water pump 102, the pressure vessel 104 and the second water pump 105) flushes the pre-filter 101, and then flows out of the pre-filter through the water outlet end of the pre-filter 101 and is discharged from the main unit through the first drain pipeline 110.

[0066] exist Figure 2 In the illustrated embodiment, the flushing detection unit 1103 is located in the first drainage pipe 110 and is used to detect the wastewater discharged from the first drainage pipe 110. The flushing detection unit 1103 can be, for example, a flow meter, a timer, a TDS probe, or a pressure sensor, or a combination of one or more of them. For example, when the flushing detection unit 1103 is a TDS probe that detects the value of water particles in the first drainage pipe 110 and outputs the detection signal, when the controller of the host determines that the detection signal exceeds the preset value, it controls the opening of the first drain valve 1101 of the first drainage pipe and the first flush valve 1063 in the first flush pipe 106 to continue flushing the pre-filter 101; when it is determined that the detection signal does not exceed the preset value, it controls the closing of the first drain valve 1101 of the first drainage pipe and the first flush valve 1063 in the first flush pipe 106 to stop flushing the pre-filter 101. When the flushing detection unit 1103 is a timer, the time for flushing the pre-filter element 101 is counted. When the timing result exceeds a preset value (for example, 1 minute), the first drain valve 1101 of the first drain pipeline and the first flush valve 1063 in the first flushing pipeline 106 are controlled to be closed, and the flushing of the pre-filter element 101 is stopped; when the timing result does not exceed the preset value, the first drain valve 1101 of the first drain pipeline and the first flush valve 1063 in the first flushing pipeline 106 are controlled to be opened, so as to continue flushing the pre-filter element 101.

[0067] like Figure 310. The figure shows a schematic diagram of the specific structure of another water purification system according to an embodiment of the present specification. In the embodiment of the figure, the system includes a main unit 100, a water supply pipeline 200, and an extension unit 300. The main unit 100 includes a pre-filter element 101, a first water pump 102, a fine filter element 103, a pressure vessel 104, a second water pump 105, a first flushing pipeline 106, a first end 1061 of the first flushing pipeline, a second end 1062 of the first flushing pipeline, a first flushing valve 1063, and a first one-way valve 1064; the system also includes a water inlet valve 107, a second one-way valve 108, a second drain pipeline 109, a combination valve 1091 of the second drain pipeline, a first drain pipeline 110, a first drain valve 1101 of the first drain pipeline, a third one-way valve 1102, a flushing detection unit 1103, a high-pressure switch 111, and a post-filter element 112.

[0068] This embodiment and Figure 2 The difference between the illustrated embodiments is that by opening the first flush valve 1063, closing the first drain valve 1101 of the first drain line, closing the water inlet valve 107, and opening the combination valve 1091 of the second drain line, the water in the first flush line 106 can flow into the fine filter element 103 after passing through the first water pump 102, and the fine filter element 103 can be flushed with pressurized water, thereby solving the problem of decreased flow rate of the fine filter element 103 due to blockage caused by long-term use. After flushing with pressurized water, the flow rate of the fine filter element 103 for water purification can be increased. Specifically:

[0069] The second end 1062 of the first flushing pipeline is located between the water outlet of the pre-filter 101 and the water inlet of the first water pump 102;

[0070] The second water pump 105 can drive the water flowing out of the pressure vessel 104 to flow into the first end 1061 of the first flushing pipeline. The water driven by the second water pump 105 flows out from the second end 1062 of the first flushing pipeline through the first flushing valve 1063. Figure 3 The water flows into the first water pump 102 in the direction indicated by the dotted arrow;

[0071] The water driven by the second water pump 105 and the first water pump 102 flushes the fine filter element 103 and is discharged through the second drainage pipe 109 .

[0072] In other embodiments, the second end 1062 of the first flushing pipeline can also be located between the water outlet end of the first water pump 102 and the water inlet end of the fine filter element 103, or, can also be located between the water outlet end of the fine filter element 103 and the water inlet end of the post-filter element 112. In addition, the second end 1062 of the first flushing pipeline can also have other setting positions, which will not be repeated here.

[0073] like Figure 4 Shown is another structural diagram of a water purification system according to an embodiment of this specification. Figure 1 The same parts are not repeated in this Figure 4 The structure described in the article uses a second water pump to circulate water in long-distance water supply pipelines. This improves the taste of water retained in the water supply pipeline for a long time, enhances the user experience, and further purifies the water to improve user water safety. Specifically, it includes: a return water port 113 of the main unit, a return water pipeline 114, a first end 1141 of the return water pipeline, a second end 1142 of the return water pipeline, and a return water valve 1143.

[0074] The water supply pipe 200 forms a circulation between the main unit 100 and the extension unit 300. The water outlet of the main unit is connected to the water supply pipe 200. The water purified by the main unit 100 flows into the extension unit 300 through the water supply pipe 200. When the extension unit 300 has no water demand or the water in the water supply pipe 200 is not fully used by the extension unit 300, the water supply pipe 200 circulates the water back to the return water end 113 of the main unit. The return water pipe in the main unit 100 The first end 1141 is connected to the return end 113 of the main unit inside the main unit 100, and the water in the water supply pipe 200 is returned to the upstream of the second water pump 105 through the second end 1142 of the return pipe. When the return valve 1143 is opened, the water will circulate in the water supply pipe 200 and the return pipe 114 under the drive of the second water pump 105. If the return valve 1143 is closed, the water in the water supply pipe 200 will not be able to flow back to the main unit 100.

[0075] Among them, the second end 1142 of the return pipe is located upstream of the second water pump 105, which can be understood as the second end 1142 of the return pipe is located at the water inlet end of the pre-filter element 101, or the second end 1142 of the return pipe is located at the water inlet end of the fine filter element 103, and the water returning in the water supply pipe is purified again through the pre-filter element 101 or the fine filter element 103.

[0076] like Figure 5Shown is another structural schematic diagram of a water purification system according to an embodiment of this specification. In this figure, a water purification unit and a sterilization unit are added between the second water pump and the water outlet of the main unit, so that the water circulating in the water supply pipeline and the return pipeline can be purified again, thereby improving the quality of water in long-distance water supply pipelines and improving user experience. The water purification unit and the sterilization unit can include only one or both. The parts of this embodiment that are the same as those in the previous embodiment are not repeated here, and also include: a return pipeline 114, a first end 1141 of the return pipeline, a second end 1142 of the return pipeline, a return valve 1143 of the return pipeline, a one-way valve 1144 of the return pipeline, a water purification unit 115, a sterilization unit 116, a water flow sensor 117, and a detection unit 118.

[0077] In this embodiment, the second end 1142 of the return water pipe is located upstream of the second water pump 105, and is specifically connected between the second one-way valve 108 and the detection unit 118. The detection unit 118 is connected to the second water pump 105, and the second water pump 105 is connected to the water purification unit 115. The water purification unit 115 is connected to the water flow sensor 117, and the water flow sensor 117 is connected to the sterilization unit 116. The sterilization unit 116 is connected to the water outlet end of the main unit 100, and the water outlet end of the main unit 100 is connected to the water supply pipe 200, and the water supply pipe 200 is connected to multiple extensions 300.

[0078] Close the first flush valve 1063 and open the return valve 1143. Under the action of the second one-way valve 108, the water in the main unit 100 can only flow in the direction of the arrow of the second one-way valve 108. Driven by the second water pump 105, the water supply pipeline 200 transports the water in the water supply pipeline to multiple extension units 300, and then transports the water back to the return end of the main unit 100. After flowing into the main unit 100, the water passes through the first end 1141 of the return pipeline. After the water circulates back in the water supply pipeline 200 and the return pipeline 114, it passes through the return valve 1143 and the one-way valve 1144, and then flows into the detection unit 118 through the second end 1142 of the return pipeline. The detection unit 118 detects the water flowing through, for example The total dissolved solids (TDS) value of the water can be detected. When the TDS value exceeds a preset value, the second water pump 105 continues to drive the water in the water supply pipe 200 and the return pipe 114 to circulate. When the TDS value does not exceed the preset value, the return valve 1143 is closed, stopping the water in the water supply pipe 200 and the return pipe 114 from continuing to circulate. In other embodiments, the detection unit 118 can also be other devices, such as a flow meter, a timer, a TDS probe, or a pressure sensor, or a combination of one or more of these. Or it can also be other devices that detect oxygen consumption, ammonia nitrogen, TOC, etc. in the water and control whether the water in the water supply pipe 200 and the return pipe 114 is circulated and purified based on these values. In addition to the connection position in this embodiment, the detection unit 118 can also be located at any position between the second end 1142 of the return pipe and the water outlet of the main unit. The water passing through the detection unit 118 flows into the water purification unit 115 driven by the second water pump 105. The water purification unit 115 includes at least one or more combinations of granular carbon, carbon rods or carbon fibers. The taste of water is improved by the water purification unit 115. The water treated by the water purification unit 115 flows into the water flow sensor 117. The water flow sensor 117 can be, for example, a Hall sensor, which can collect, for example, water flow or other water flow data (such as water pressure, flow rate, etc.). The controller of the host can control whether the sterilization unit 116 is working according to the detection result of the water flow sensor 117. When there is no water flowing through, the power-consuming sterilization unit 116 is stopped, thereby achieving the purpose of energy saving. The water flows into the sterilization unit 116 through the water flow sensor 117. The sterilization unit 116 includes at least one or more of an ultraviolet sterilization unit, an ozone module, a bromine resin module or a chlorine resin module. When the sterilization unit 116 includes an ultraviolet sterilization unit (such as a UV lamp) and / or an ozone module, the controller of the host can also control the sterilization unit 116 according to the detection results of the water flow sensor 117 or the detection unit 118.In other embodiments, the positions of the detection unit 118 , the water purification unit 115 , the water flow sensor 117 , and the sterilization unit 116 may be arranged in other locations, which are not limited here.

[0079] like Figure 6 Shown is another structural schematic diagram of a water purification system according to an embodiment of the present specification. In this figure, the purpose of enhancing the driving force of water circulation in the water supply pipeline and the return pipeline is described, and the water used for flushing the pipeline in the return pipeline is discharged. In this embodiment, the same parts as those in the previous embodiment are not repeated, and further include: a second flushing pipeline 119, a first end 1191 of the second flushing pipeline, a second end 1192 of the second flushing pipeline, a second flushing valve 1193 of the second flushing pipeline, a one-way valve 1194 of the second flushing pipeline, a third drain pipeline 120 connected to the return pipeline 114, a third drain valve 1201 of the third drain pipeline, and a one-way valve 1202 of the third drain pipeline.

[0080] The second flushing pipeline 119 introduces the water pressurized by the first water pump 102 into the return water pipeline 114 , thereby improving the circulation flow of water in the water supply pipeline 200 and the return water pipeline 114 .

[0081] In this embodiment, the first end 1191 of the second flushing pipeline is connected to the return pipeline 114, and specifically can be located between the one-way valve 1144 of the return pipeline and the second end 1142 of the return pipeline. The second end 1192 of the second flushing pipeline is located downstream of the first water pump 102, and specifically can be located between the water outlet end of the first water pump 102 and the water inlet end of the fine filter element 103. In other embodiments, the second end 1192 of the second flushing pipeline can be located between the water outlet end of the fine filter element 103 and the water inlet end of the post-filter element 112, or, the second end 1192 of the second flushing pipeline can be located between the water outlet end of the pressure vessel 104 and the second one-way valve 108, or, the second end 1192 of the second flushing pipeline can be located between the second one-way valve 108 and the second end 1142 of the return pipeline.

[0082] The third drainage pipeline 120 is located in the return water pipeline 114. When the third drainage valve 1201 of the third drainage pipeline is opened, water flowing back from the water supply pipeline 200 into the return water pipeline 114 is discharged from the main unit through the third drainage pipeline 120. The one-way valve 1202 of the third drainage pipeline ensures that the discharged wastewater does not flow back into the return water pipeline 114. In this embodiment, the third drainage pipeline 120 is connected between the first end 1141 of the return water pipeline and the return water valve 1143.

[0083] Open the second flush valve 1193 of the second flush pipeline, close the combination valve 1091 of the second drain pipeline, open the return valve 1143 of the return pipeline, close the third drain valve 1201 of the third drain pipeline, close the first flush valve 1063, and the water driven by the first water pump 102 and the second water pump 105 flows in the water supply pipeline 200 and the return pipeline 114. When the third drain valve 1201 of the third drain pipeline is opened, the water circulating in the water supply pipeline 200 and the return pipeline 114 can be discharged through the third drain pipeline 120. When the second flush valve 1193 of the second flush pipeline is closed and the third drain valve 1201 of the third drain pipeline is opened, the water in the water supply pipeline 200 and the return pipeline 114 circulates under the drive of the second water pump 105, and when the water flows to the third drain valve 1201 of the third drain pipeline, it is discharged through the third drain pipeline 120; when the third drain valve 1201 of the third drain pipeline is closed, the water in the water supply pipeline 200 and the return pipeline 114 circulates under the drive of the second water pump 105.

[0084] Through the water purification system in the embodiment of the present invention, the pre-filter element can be flushed at low cost and low structural complexity, thereby extending the life of the equipment. It can also improve the drinking water taste and water safety in long-distance water supply pipelines, and can also make full use of the pressure device in the main unit of the water purification system to improve water purification efficiency.

[0085] It should also be understood that in the embodiments of this specification, the term "and / or" is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this specification generally indicates that the associated objects are in an "or" relationship.

[0086] In the several embodiments provided in this specification, it should be understood that the disclosed systems and devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units described is merely a logical functional division. In actual implementation, other division methods may be used, such as combining or integrating multiple units or components into another system, or omitting or not implementing certain features.

[0087] Specific embodiments are used in this specification to illustrate the principles and implementation methods of this specification. The description of the above embodiments is only used to help understand the methods and core ideas of this specification. At the same time, for those skilled in the art, based on the ideas of this specification, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting this specification.

Claims

1. A water purification system, characterized in that: include: A host that can purify the water entering from the water inlet of the host; at least one extension unit capable of outputting water purified by the main unit, and a water supply pipeline connecting the main unit and the extension unit; The host comprises: The pre-filter element, the first water pump, the fine filter element, the pressure vessel and the second water pump are connected in sequence; A first flushing pipeline, wherein the first end of the first flushing pipeline is located between the second water pump and the water outlet of the main unit, and the second end of the first flushing pipeline is located upstream or downstream of the pre-filter element.

2. The water purification system according to claim 1, characterized in that: The second water pump can drive the water flowing out of the pressure vessel to flow into the first end of the first flushing pipeline. The water driven by the second water pump flows out from the second end of the first flushing pipeline through the first flushing valve and flows into the pre-filter element to flush the pre-filter element.

3. The water purification system according to claim 2, characterized in that: The second end of the first flushing pipeline is located between the water inlet end of the main unit and the water inlet end of the pre-filter; or, The second end of the first flushing pipeline is located between the water outlet end of the pre-filter element and the water inlet end of the pressure container.

4. The water purification system according to claim 3, characterized in that: The second end of the first flushing pipeline is located between the water outlet end of the pre-filter element and the water inlet end of the first water pump.

5. The water purification system according to claim 2, characterized in that: The main unit further includes a first drainage pipeline connected to the water inlet end of the pre-filter element or the water outlet end of the pre-filter element; The main unit further includes a first drain valve, which is located in the first drain pipeline; The water flowing out from the second end of the first flushing pipeline flows into the pre-filter element for flushing and is then discharged from the first drainage pipeline.

6. The water purification system according to claim 5, characterized in that: The host further includes a flushing detection unit located in the first drainage pipeline and configured to detect water in the first drainage pipeline.

7. The water purification system according to claim 1, characterized in that: The second end of the first flushing pipeline is located between the water outlet of the pre-filter and the water inlet of the first water pump; The second water pump can drive the water flowing out of the pressure vessel to flow into the first end of the first flushing pipeline. The water driven by the second water pump flows out of the second end of the first flushing pipeline through the first flushing valve and then flows into the first water pump. The water driven by the second water pump and the first water pump flushes the fine filter element and is discharged through the second drainage pipeline.

8. The water purification system according to claim 1, characterized in that: The main unit further comprises a post-filter element, which is located between the fine filter element and the pressure vessel; The host further includes a high-pressure switch, which is located between the pressure vessel and the second water pump and is used to detect the pressure at the water outlet of the pressure vessel.

9. The water purification system according to claim 1, characterized in that: The water outlet of the main unit is connected to at least one of the extension units via the water supply pipeline; The main unit further includes a water return end, through which the water supply pipeline returns the water in the water supply pipeline to the main unit; The main unit further includes a return water pipeline, a first end of the return water pipeline is connected to the return water end, and a second end of the return water pipeline is located upstream of the second water pump; The main unit further includes a return valve located in the return pipeline.

10. The water purification system according to claim 9, characterized in that: The second end of the return water pipeline is connected to the water inlet end of the second water pump.

11. The water purification system according to claim 9, characterized in that: The main unit further includes a water purification unit and / or a sterilization unit, which is located in the return water pipeline, or between the second end of the return water pipeline and the water outlet end of the main unit.

12. The water purification system according to claim 11, characterized in that: The water purification unit and / or sterilization unit is located between the second water pump and the water outlet of the main unit.

13. The water purification system according to claim 12, characterized in that: The water purification unit and / or the sterilization unit is located between the first end of the first flushing pipeline and the water outlet end of the host.

14. The water purification system according to claim 12, characterized in that: The water purification unit comprises at least one or a combination of granular carbon, carbon rods or carbon fibers; The sterilization unit includes at least one of an ultraviolet sterilization unit, an ozone module, a bromine resin module or a chlorine resin module, or a combination of multiple thereof.

15. The water purification system according to claim 14, characterized in that: When the sterilization unit includes an ultraviolet sterilization unit and / or an ozone module, the host further includes a water flow sensor located upstream of the ultraviolet sterilization unit and / or the ozone module, for controlling the opening and closing of the ultraviolet sterilization unit and / or the ozone module according to the water flow.

16. The water purification system according to claim 15, characterized in that: The main unit further includes a detection unit located between the second end of the return water pipeline and the water outlet end of the main unit.

17. The water purification system according to claim 16, characterized in that: The detection unit includes a flow meter, a timer, a TDS probe, or a pressure sensor, or a combination of the two or more.

18. The water purification system according to claim 9, characterized in that: The second water pump drives the water in the water supply pipeline and the water return pipeline to circulate in the water supply pipeline and the water return pipeline.

19. The water purification system according to claim 9, characterized in that: The main unit further includes a second flushing pipeline, wherein a first end of the second flushing pipeline is located in the return water pipeline, and a second end of the second flushing pipeline is located between the first water pump and the second end of the return water pipeline; The main unit further includes a second flushing valve located in the second flushing pipeline; The main unit further includes a third drainage pipeline connected to the return water pipeline; The main unit further includes a third drain valve, which is located in the third drain pipeline; Driven by the first water pump and the second water pump, the water in the return pipe and the water supply pipe is discharged through the third drainage pipe.

20. The water purification system according to claim 19, characterized in that The second end of the second flushing pipeline is connected between the water outlet of the first water pump and the water inlet of the fine filter element.

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