Water purification type water purifier based on wastewater control and control method

Abstract

The invention discloses a water purification type water purifier based on wastewater control and a control method. The water purifier comprises a front-end filtering module, a water inlet booster pump, an RO (Reverse Osmosis) membrane filter element, a purified water path and a wastewater path, the outlet water of the front-end filtering module is communicated with the inlet water of the water inlet booster pump, and the outlet water of the water inlet booster pump is communicated with the inlet water of the RO membrane filter element; the purified water path comprises a purified water one-way valve, purified water outlet of the RO reverse osmosis membrane filter element is communicated with water inlet of the purified water one-way valve, water outlet of the purified water one-way valve is communicated with water inlet of the purified water faucet, and a water inlet and outlet pipeline of the purified water storage pressure barrel is communicated with a pipeline between the purified water one-way valve and the purified water faucet. The purified water high-pressure switch is connected to a pipeline between the purified water one-way valve and the purified water storage pressure barrel; the waste water path comprises a waste water proportional valve, a waste water one-way valve, a waste water high-pressure switch and a waste water faucet. Through linkage of the wastewater high-pressure switch and the purified water high-pressure switch, purified water is controlled through wastewater, and the utilization rate of water is increased.

Description

Technical Field

[0001] This invention relates to the field of water purifier technology, and in particular to a wastewater-controlled water purifier and its control method. Background Technology

[0002] A water purifier is a small water treatment device that uses multi-stage filtration technology to deeply treat water quality, primarily for household drinking water purification. Water purifiers employ filter cartridges such as microfiltration membranes, compressed activated carbon, and ultrafiltration membranes to remove impurities such as suspended solids, heavy metals, bacteria, and residual chlorine from the water. RO (Reverse Osmosis) water purifiers utilize the principle of reverse osmosis for water treatment. The purifier contains a reverse osmosis membrane filter cartridge. Under certain pressure, water molecules can pass through the RO membrane, while impurities such as inorganic salts, heavy metal ions, organic matter, colloids, bacteria, and viruses cannot. This allows some water to pass through the RO membrane, while the water that does not pass through becomes concentrated water due to the increased solute concentration.

[0003] While RO reverse osmosis water purifiers have a strong purification effect, they also generate a large amount of wastewater during the purification process, and these issues urgently need to be addressed. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems in the prior art. In order to solve the above problems, this invention proposes a wastewater-controlled water purifier and a control method.

[0005] The technical solution adopted in this invention is: A wastewater-controlled water purifier includes a front-end filtration module, an inlet booster pump, an RO reverse osmosis membrane filter element, a purified water path, and a wastewater path. The outlet of the front-end filtration module is connected to the inlet of the inlet booster pump, and the outlet of the inlet booster pump is connected to the inlet of the RO reverse osmosis membrane filter element. The purified water path includes a purified water check valve, a purified water high-pressure switch, a purified water storage pressure tank, and a purified water faucet. The purified water outlet of the RO reverse osmosis membrane filter element is connected to the inlet of the purified water check valve, and the outlet of the purified water check valve is connected to the inlet of the purified water faucet. The inlet and outlet pipes of the purified water storage pressure tank are connected to the purified water check valve. The pipeline between the valve and the water faucet is connected; the water purifier high-pressure switch is connected to the pipeline between the water purifier check valve and the water purifier storage pressure tank; the wastewater circuit includes a wastewater proportional valve, a wastewater check valve, a wastewater high-pressure switch, and a wastewater faucet; the wastewater outlet of the RO reverse osmosis membrane filter is connected to the inlet of the wastewater proportional valve; the outlet of the wastewater proportional valve is connected to the inlet of the wastewater check valve; the outlet of the wastewater check valve is connected to the inlet of the wastewater faucet; the wastewater high-pressure switch is connected to the pipeline between the wastewater check valve and the wastewater faucet; the wastewater high-pressure switch is connected in series with the water purifier high-pressure switch circuit.

[0006] Preferably, the front-end filtration module includes a first filter element, an inlet solenoid valve, a second filter element, a third filter element, and a fourth filter element. The water outlet of the first filter element is connected to the water inlet of the inlet solenoid valve, the water outlet of the inlet solenoid valve is connected to the water inlet of the second filter element, the water outlet of the second filter element is connected to the water inlet of the third filter element, the water outlet of the third filter element is connected to the water inlet of the fourth filter element, and the water outlet of the fourth filter element is connected to the water inlet of the inlet booster pump.

[0007] Preferably, the wastewater circuit also includes a wastewater storage pressure tank, and the inlet and outlet pipes of the wastewater storage pressure tank are connected to the pipelines between the wastewater check valve and the wastewater high-pressure switch.

[0008] Preferably, the purified water circuit further includes a fifth filter element and a purified water storage pressure tank. The purified water outlet of the RO reverse osmosis membrane filter element is connected to the inlet of the fifth filter element, the outlet of the fifth filter element is connected to the inlet of the purified water check valve, and the inlet and outlet pipes of the purified water storage pressure tank are connected to the pipes between the RO reverse osmosis membrane filter element and the fifth filter element. The first filter element is a PP filter element, the second filter element is an inlet activated carbon filter element, the third filter element is a sintered activated carbon filter element, the fourth filter element is a UF ultrafiltration filter element, and the fifth filter element is a purified activated carbon filter element.

[0009] Preferably, the system also includes a membrane washing wastewater circuit, which comprises a membrane washing wastewater check valve, a membrane washing wastewater high-pressure switch, and a membrane washing wastewater faucet. The wastewater outlet of the RO reverse osmosis membrane filter element is connected to the inlet of the membrane washing wastewater check valve, and the outlet of the membrane washing wastewater check valve is connected to the inlet of the membrane washing wastewater faucet. The membrane washing wastewater high-pressure switch is located on the pipeline between the membrane washing wastewater check valve and the membrane washing wastewater faucet. The membrane washing wastewater circuit also includes a membrane washing wastewater control valve and a membrane washing wastewater low-pressure switch. The wastewater outlet of the RO reverse osmosis membrane filter element is connected to the inlet of the membrane washing wastewater control valve, and the outlet of the membrane washing wastewater control valve is connected to the inlet of the membrane washing wastewater check valve. The membrane washing wastewater low-pressure switch is connected to the pipeline between the membrane washing wastewater check valve and the membrane washing wastewater high-pressure switch.

[0010] Preferably, the water inlet of the first filter element is connected to a mechanical water purification switch.

[0011] Preferably, the wastewater circuit further includes a wastewater solenoid valve, a wastewater branch check valve, and a drain interface. The inlet of the wastewater solenoid valve is connected to the inlet of the wastewater proportional valve, the outlet of the wastewater solenoid valve is connected to the inlet of the wastewater branch check valve, and the outlet of the wastewater branch check valve is connected to the inlet of the wastewater check valve. A drain interface is connected to the pipeline between the wastewater solenoid valve and the wastewater branch check valve. An automatic on / off water supply valve is connected to the inlet of the wastewater faucet.

[0012] Preferably, the system also includes a wastewater filter cartridge, which is connected in series in the pipeline between the RO reverse osmosis membrane cartridge and the wastewater proportional valve.

[0013] Preferably, the system also includes a backup water circuit, a wastewater branch control switch, and an end pressure tank. The backup water circuit includes a water shut-off solenoid valve and a collection outlet. The inlet of the water shut-off solenoid valve is connected to the outlet of the mechanical water purification switch, the outlet of the water shut-off solenoid valve is connected to the inlet of the collection outlet, and the inlet of the collection outlet is connected to the inlet of the wastewater faucet. The inlet and outlet pipes of the end pressure tank are connected to the pipes between the wastewater faucet and the collection outlet. The wastewater branch control switch is connected to the pipes between the wastewater high-pressure switch and the end pressure tank.

[0014] A control method for a wastewater-controlled water purifier, wherein the wastewater high-pressure switch and the water purification high-pressure switch include four logic states: Logic state A: The wastewater high-pressure switch and the clean water high-pressure switch are both turned on simultaneously; Logic state B: The wastewater high-pressure switch and the clean water high-pressure switch are both disconnected. Logic state C: Wastewater high-pressure switch is on, purified water high-pressure switch is off; Logic state D: Wastewater high-pressure switch is off, purified water high-pressure switch is on; When both the wastewater high-pressure switch and the water purification high-pressure switch are in logic state A, both switches are simultaneously turned on. At this time, the inlet booster pump works, and the water purifier produces purified water. When the water purifier faucet is opened, if the water pressure in the water purifier's storage tank is higher than the pressure cutoff value of the water purifier's high-pressure switch, and the water pressure when the wastewater faucet is closed is higher than the pressure cutoff value of the wastewater high-pressure switch, this is logic state B. Under the influence of water pressure, purified water flows out from the water purifier's storage tank. At this time, the water purifier's high-pressure switch is not activated, and the wastewater high-pressure switch is also not activated because the wastewater faucet is not open. The inlet booster pump does not work, and the water purifier neither produces purified water nor wastewater. When the water pressure in the water purifier's storage tank drops to a certain value, the water purifier's high-pressure switch is activated. At this time, the wastewater circuit does not use water or the water usage is insufficient to reduce the pressure to the level that would cause the wastewater high-pressure switch to deactivate, thus forming logic state D. At this time, the inlet booster pump still does not work, and the water purifier neither produces purified water nor wastewater. Only when the wastewater faucet is also opened and wastewater is used, or when the wastewater is automatically used by the system's wastewater intake equipment, and the wastewater circuit pressure also meets the pressure required for the wastewater high-pressure switch to activate, will the system return to logic state D. When the water purifier starts working, it enters logic state A, producing both purified and wastewater simultaneously. Regardless of which faucet closes first, the pressure in both the purified and wastewater circuits increases. If the wastewater pressure reaches a certain value first, the high-pressure switch closes first, resulting in logic state D. Conversely, if the purified water pressure reaches a certain value first, the high-pressure switch closes first, resulting in logic state C. The reverse is also true. When the wastewater faucet is opened first, wastewater flows from the wastewater storage tank under pressure. At this time, neither the purified nor wastewater high-pressure switches are activated, the inlet booster pump does not work, and the purifier neither produces purified water nor wastewater. When the water pressure in the wastewater storage tank drops below a certain value, the high-pressure switch activates, resulting in logic state C. The purifier will not produce water until the wastewater storage tank is depleted, as long as the purified or membrane washing water circuits are not opened, thus achieving a water-saving function by controlling the purifier's operation with wastewater.

[0015] The beneficial effects of this invention are as follows: 1. This invention achieves comprehensive control of the water purifier's output by linking a wastewater high-pressure switch with a purified water high-pressure switch, thereby improving water utilization and saving water.

[0016] 2. Add a wastewater high-pressure switch and a water purification high-pressure switch, which are connected in series. The wastewater circuit controls the water purification circuit, thereby achieving water conservation.

[0017] 3. Set up a purified water storage pressure tank and a wastewater storage pressure tank, and adjust the water output mode by adjusting the purified water storage pressure tank and the wastewater storage pressure tank to achieve the purpose of water conservation.

[0018] 4. Add a fifth filter element and a water pressure tank to improve water storage and further enhance the purification effect.

[0019] 5. Add a wastewater path for washing membranes to improve the rinsing effect of the RO reverse osmosis membrane filter element and increase wastewater utilization efficiency.

[0020] 6. Add a membrane washing wastewater control valve and a membrane washing wastewater low-pressure switch to further improve the rinsing effect of the RO reverse osmosis membrane filter element.

[0021] 7. By adding a low-pressure inlet switch, the inlet water pressure can be checked. The low-pressure inlet switch is controlled by linkage with the inlet booster pump.

[0022] 8. Add wastewater solenoid valves, wastewater branch check valves, and drain interfaces so that flushing wastewater can flow out through different water paths.

[0023] 9. Add wastewater filter cartridges to filter wastewater, improve the cleanliness of the effluent, and meet the needs of different usage scenarios.

[0024] 10. Add control switches for backup water circuit and wastewater branch circuit, which can flexibly adjust the wastewater and backup water circuits as needed, making operation convenient. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 5 of the present invention; Figure 6 This is a schematic diagram of the structure of Embodiment Six of the present invention; Figure 7 This is a schematic diagram of the structure of Embodiment Seven of the present invention; Figure 8 This is a schematic diagram of the structure of Embodiment 8 of the present invention; Figure 9 This is a schematic diagram of the structure of Embodiment Nine of the present invention; In the diagram: 1-First filter element, 2-Inlet solenoid valve, 3-Second filter element, 4-Third filter element, 5-Fourth filter element, 6-Inlet booster pump, 7-RO reverse osmosis membrane filter element, 8-Fifth filter element, 9-Purified water storage pressure tank, 10-Purified water check valve, 11-Purified water high-pressure switch, 12-Purified water storage pressure tank, 13-Purified water faucet, 14-Wastewater proportional valve, 15-Membrane washing wastewater control valve, 16-Wastewater check valve, 17-Membrane washing wastewater check valve, 18-Wastewater high-pressure switch 19-High-pressure switch for membrane washing wastewater; 20-Low-pressure switch for membrane washing wastewater; 21-Wastewater faucet; 22-Wastewater faucet for membrane washing; 24-Water purifier computer board; 26-Mechanical water purification switch; 27-Wastewater storage pressure tank; 28-Wastewater solenoid valve; 29-Wastewater branch check valve; 30-Drainage interface; 31-Automatic water supply valve; 32-Wastewater branch control switch; 33-Water shut-off solenoid valve; 34-End pressure tank; 35-Wastewater filter element; 36-Collection outlet. Detailed Implementation

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] This embodiment does not impose any limitation on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0028] In the description of this invention, it should be understood that the terms "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention. If the terms "first" and "second" are used herein to define components, those skilled in the art should know that the use of "first" and "second" is merely for the convenience of describing this invention and for simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0029] A wastewater-controlled water purifier includes a front-end filtration module, an inlet booster pump 6, an RO reverse osmosis membrane filter element 7, a purified water path, and a wastewater path. The front-end filtration module includes a first filter element 1, an inlet solenoid valve 2, a second filter element 3, a third filter element 4, and a fourth filter element 5. The first filter element 1 is a PP filter element (polypropylene melt-blown filter element). The outlet of the first filter element 1 is connected to the inlet of the inlet solenoid valve 2; the outlet of the inlet solenoid valve 2 is connected to the inlet of the second filter element 3; the outlet of the second filter element 3 is connected to the inlet of the third filter element 4; the outlet of the third filter element 4 is connected to the inlet of the fourth filter element 5; and the outlet of the fourth filter element 5 is connected to the inlet of the inlet booster pump 6. The second filter element 3 is an inlet activated carbon filter element; the third filter element 4 is a sintered activated carbon filter element; and the fourth filter element 5 is an UF ultrafiltration membrane filter element. The front-end filtering module and its working method are existing technologies and will not be described in detail here.

[0030] The outlet water of the inlet booster pump 6 is connected to the inlet water of the RO reverse osmosis membrane filter element 7. Both the inlet booster pump 6 and the RO reverse osmosis membrane filter element 7 are existing technologies, and their working principles will not be described in detail here.

[0031] The water purification circuit includes a water purification one-way valve 10, a water purification high-pressure switch 11 (which can be a pressure switch sensor), a water purification storage pressure tank 12, and a water purification faucet 13. The purified water outlet of the RO reverse osmosis membrane filter 7 is connected to the water inlet of the water purification one-way valve 10, and the water outlet of the water purification one-way valve 10 is connected to the water inlet of the water purification faucet 13. The inlet and outlet pipes of the water purification storage pressure tank 12 (this is prior art and will not be described in detail here) are connected to the pipes between the water purification one-way valve 10 and the water purification faucet 13. The water purification high-pressure switch 11 is connected to the pipe between the water purification one-way valve 10 and the water purification storage pressure tank 12. The inlet and outlet of the water purification storage pressure tank 12 are connected by a single pipe. The water purification storage pressure tank 12 is prior art and will not be described in detail here.

[0032] The wastewater circuit includes a wastewater proportional valve 14, a wastewater check valve 16, a wastewater high-pressure switch 18 (which can be a pressure switch sensor), and a wastewater faucet 21. The wastewater outlet of the RO reverse osmosis membrane filter element 7 is connected to the inlet of the wastewater proportional valve 14, the outlet of the wastewater proportional valve 14 is connected to the inlet of the wastewater check valve 16, and the outlet of the wastewater check valve 16 is connected to the inlet of the wastewater faucet 21. The wastewater high-pressure switch 18 is connected to the pipeline between the wastewater check valve 16 and the wastewater faucet 21.

[0033] The wastewater high-pressure switch 18 and the water purification high-pressure switch 11 are connected in series.

[0034] The working principle of the wastewater-controlled water purifier of this invention: A wastewater circuit is added, along with a wastewater high-pressure switch 18 and a purified water high-pressure switch 11. In terms of circuit connection, the two high-pressure switches in the purified water high-pressure switch 11 and the wastewater high-pressure switch 18 are connected in series. There are four switch logic states to control the water purifier's operation, or the operation can be controlled by sending signals to the water purifier's computer board 24 (the water purifier's computer board 24 is optional and its design is not limited to various other functions). The control logic of the wastewater-controlled water purifier is that the water purifier only starts working when the high-pressure switches in the purified water high-pressure switch 11 and the wastewater high-pressure switch 18 simultaneously meet the set low-pressure state (both are on), thereby controlling the water production pipeline and achieving water conservation.

[0035] The wastewater-controlled water purifier of the present invention eliminates the design commonly used in the current system where wastewater from the RO module is directly discharged into the sewer after passing through an integrated wastewater solenoid valve (or its separate parallel connection is also the same) via a solenoid valve and a wastewater proportional valve. The newly designed wastewater path achieves water conservation.

[0036] Example 2 is an improvement on Example 1. The similarities will not be repeated here; the differences are as follows: To improve the control effect of the present invention, the wastewater circuit also includes a wastewater storage pressure tank 27. The inlet and outlet pipes of the wastewater storage pressure tank 27 are connected to the pipes between the wastewater check valve 16 and the wastewater high-pressure switch 18. The inlet and outlet of the wastewater storage pressure tank 27 are a single pipe. The wastewater storage pressure tank 27 is prior art and will not be described in detail here.

[0037] To illustrate the difference between the proposed solution and traditional RO membrane water purifiers, the traditional RO membrane water purifier solution will be explained in the following two points: 1. Traditional RO membrane water purifiers rely solely on the opening and closing of the high-pressure switch 11 in the water purification circuit or the pressure signal sent to the water purifier's computer board 24 to control the start and stop of water purification.

[0038] 2. In the traditional solution, after the water purifier stops purifying water when the water faucet 13 is closed or the water pressure in the water storage tank 12 reaches the shutdown pressure, there is a backwashing process to enhance membrane washing after the wastewater solenoid valve is opened, which will generate wastewater and force it to be discharged.

[0039] The innovative aspects of this application's solution are: A wastewater high-pressure switch 18 and a purified water high-pressure switch 11 are added. In terms of circuit connection, the two high-pressure switches in the purified water high-pressure switch 11 and the wastewater high-pressure switch 18 are connected in series, with four switch logic states. These control the water purifier's operation, or control it by sending signals to the water purifier's computer board 24 (the water purifier's computer board 24 is optional and its design is not limited to various other functions). The water purifier's water circuit control logic is that the booster pump only starts working when both the purified water high-pressure switch 11 and the wastewater high-pressure switch 18 simultaneously meet the set low-pressure state, and only then does the water purifier begin purifying water.

[0040] It should be noted that the usage scenario of this water purifier is quite different from that of a traditional water purifier. A traditional water purifier is designed so that opening the water faucet 13 activates the high-pressure switch 11, starting the purifier and closing the faucet 13 stops it. Because of this, traditional water purifiers require frequent control of the faucet 13 to operate, and the wastewater generated must be discharged or stored for other uses, which is inconvenient and produces a significant amount of wastewater.

[0041] The water purifier using this design adds a wastewater path. Regardless of whether the wastewater or purified water faucets are opened separately or simultaneously, including the purified water storage tank, the purifier does not immediately start producing water. Only when the water level in both the wastewater and purified water storage tanks is insufficient (i.e., the pressure is too low) will the purifier's computer board 24 control the automatic start and stop of the purifier under four logic states of the series combination of pressure switches 18 and 11. The purifier will automatically stop working when either the wastewater or purified water path is full. It is generally recommended that the wastewater faucet 21 (this design can connect multiple wastewater faucets 21) be connected above the sink, just like the purified water faucet, and clearly marked. Every little bit of wastewater used for daily cleaning will free up wastewater storage space in the purifier, preparing for the next purification. The wastewater is pressurized like tap water, which is very convenient, and the wastewater will be used habitually without people even realizing it.

[0042] In this embodiment, the capacity of the purified water storage pressure tank 12 and the capacity of the wastewater storage pressure tank 27 can be selected as needed (generally, the capacity of the wastewater storage pressure tank 27 is greater than the capacity of the purified water storage pressure tank 12).

[0043] The wastewater high-pressure switch 18 and the purified water high-pressure switch 11 have four logic states: Logic State A: Both wastewater high-pressure switch 18 and purified water high-pressure switch 11 are on simultaneously; Logic State B: Both wastewater high-pressure switch 18 and purified water high-pressure switch 11 are off simultaneously; Logic State C: Wastewater high-pressure switch 18 is on and purified water high-pressure switch 11 is off; Logic State D: Wastewater high-pressure switch 18 is off and purified water high-pressure switch 11 is on. Only when both wastewater high-pressure switch 18 and purified water high-pressure switch 11 are in Logic State A are they on simultaneously. At this time, the inlet booster pump 6 works, and the water purifier produces purified water.

[0044] When the water faucet 13 is opened, if the water pressure in the water storage tank 12 is higher than the disconnection value of the water pressure switch 11, and the water pressure when the wastewater faucet 21 is closed is higher than the disconnection value of the wastewater pressure switch 18, then the system is in logic state B. Under the influence of water pressure, purified water flows out from the water storage tank 12. At this time, the water pressure switch 11 is not activated, and the wastewater pressure switch 18 is also not activated because the wastewater faucet 21 is not open. Therefore, the inlet booster pump 6 does not work, and the water purifier neither produces purified water nor wastewater. When the water pressure in the purified water storage pressure tank 12 drops to a certain value, the purified water high-pressure switch 11 is activated. At this time, the wastewater circuit has no water usage or the water usage is insufficient to lower the pressure to the level required to activate the wastewater high-pressure switch 18, thus forming logic state D. At this time, the inlet booster pump 6 is still not working, and the water purifier neither produces purified water nor wastewater. Only when the wastewater faucet 21 is also opened to use wastewater, or when the wastewater is automatically used by the system's wastewater intake equipment, and the wastewater circuit pressure meets the activation pressure of the wastewater high-pressure switch 18, does logic state A occur, and the water purifier starts working, producing purified water and wastewater simultaneously. Regardless of whether the purified water faucet 13 or the wastewater faucet 21 closes first, as the pressure in the purified water circuit and the wastewater circuit rises, when the wastewater circuit pressure reaches a certain value first, the wastewater high-pressure switch 18 closes first, again forming logic D. Conversely, when the purified water circuit reaches a certain pressure before the wastewater circuit, the purified water high-pressure switch 11 closes first, forming logic C; and vice versa. At 21:00, under the action of water pressure, wastewater flows out from the wastewater storage pressure tank 27. At this time, neither the purified water high-pressure switch 11 nor the wastewater high-pressure switch 18 is turned on, the inlet booster pump 6 does not work, and the water purifier does not produce purified water or wastewater. When the water pressure in the wastewater storage pressure tank 27 is lower than a certain value, the wastewater high-pressure switch 18 is turned on, and logic state C is formed. Until the wastewater storage is used up, as long as the purified water is not turned on, the water purifier will not produce water, thus achieving the water-saving function of controlling the operation of the water purifier by wastewater.

[0045] The wastewater-controlled water purifier of the present invention achieves comprehensive control of the water circuit of the water purifier by linking the wastewater high-pressure switch 18 and the water purification high-pressure switch 11 through the wastewater control, thereby improving water utilization and saving water.

[0046] Example 3 is an improvement on Example 2. The similarities will not be repeated here; the differences are as follows: The water purification circuit also includes the fifth filter element 8 and the purified water storage pressure tank 9. The purified water outlet of the RO reverse osmosis membrane filter element 7 is connected to the inlet of the fifth filter element 8, and the outlet of the fifth filter element 8 is connected to the inlet of the purified water check valve 10. The inlet and outlet pipes of the purified water storage pressure tank 9 are connected to the pipes between the RO reverse osmosis membrane filter element 7 and the fifth filter element 8.

[0047] The fifth filter element 8 is a water purification activated carbon filter element (T33 taste-enhancing activated carbon). The water purification storage pressure tank 9 adopts an existing water storage pressure tank with one inlet and one outlet (the water purification storage pressure tank 9 is existing technology and will not be described in detail here).

[0048] The water purification circuit is enhanced with a fifth filter element 8 and a water purification pressure tank 9, improving water storage and purification efficiency.

[0049] Example 4 is an improvement on Example 1. The similarities will not be repeated here; the differences are as follows: It also includes a membrane washing wastewater circuit, which includes a membrane washing wastewater check valve 17, a membrane washing wastewater high-pressure switch 19 (the membrane washing wastewater high-pressure switch 19 can be a pressure switch sensor), and a membrane washing wastewater faucet 22. The wastewater outlet of the RO reverse osmosis membrane filter element 7 is connected to the inlet of the membrane washing wastewater check valve 17, and the outlet of the membrane washing wastewater check valve 17 is connected to the inlet of the membrane washing wastewater faucet 22. The membrane washing wastewater high-pressure switch 19 is located on the pipeline between the membrane washing wastewater check valve 17 and the membrane washing wastewater faucet 22.

[0050] The flushing effect of RO reverse osmosis membrane filter element 7 is improved by adding a wastewater path for membrane washing.

[0051] Example 5 is an improvement on Example 2. The similarities will not be repeated here; the differences are as follows: It also includes a membrane washing wastewater circuit, which includes a membrane washing wastewater check valve 17, a membrane washing wastewater high-pressure switch 19, and a membrane washing wastewater faucet 22. The wastewater outlet of the RO reverse osmosis membrane filter element 7 is connected to the inlet of the membrane washing wastewater check valve 17, and the outlet of the membrane washing wastewater check valve 17 is connected to the inlet of the membrane washing wastewater faucet 22. The membrane washing wastewater high-pressure switch 19 is located on the pipeline between the membrane washing wastewater check valve 17 and the membrane washing wastewater faucet 22.

[0052] Another solution is to improve the rinsing effect of RO reverse osmosis membrane filter element 7 by adding a wastewater path for membrane washing.

[0053] Example 6 is an improvement on Example 3. The similarities will not be repeated here; the differences are as follows: It also includes a membrane washing wastewater circuit, which includes a membrane washing wastewater check valve 17, a membrane washing wastewater high-pressure switch 19, and a membrane washing wastewater faucet 22. The wastewater outlet of the RO reverse osmosis membrane filter element 7 is connected to the inlet of the membrane washing wastewater check valve 17, and the outlet of the membrane washing wastewater check valve 17 is connected to the inlet of the membrane washing wastewater faucet 22. The membrane washing wastewater high-pressure switch 19 is located on the pipeline between the membrane washing wastewater check valve 17 and the membrane washing wastewater faucet 22.

[0054] The membrane washing wastewater circuit also includes a membrane washing wastewater control valve 15 and a membrane washing wastewater low-pressure switch 20 (the membrane washing wastewater low-pressure switch 20 can be a pressure switch sensor). The wastewater outlet of the RO reverse osmosis membrane filter 7 is connected to the inlet of the membrane washing wastewater control valve 15. The outlet of the membrane washing wastewater control valve 15 is connected to the inlet of the membrane washing wastewater check valve 17. The outlet of the membrane washing wastewater check valve 17 is connected to the inlet of the membrane washing wastewater faucet 22. The membrane washing wastewater high-pressure switch 19 is located on the pipeline between the membrane washing wastewater check valve 17 and the membrane washing wastewater faucet 22. The membrane washing wastewater low-pressure switch 20 is connected to the pipeline between the membrane washing wastewater check valve 17 and the membrane washing wastewater high-pressure switch 19. The membrane washing wastewater low-pressure switch 20 is linked to the inlet booster pump 6. When the membrane washing wastewater low-pressure switch 20 is closed, the inlet booster pump 6 starts.

[0055] Adding a membrane washing wastewater control valve 15 and a membrane washing wastewater low-pressure switch 20 further improves the rinsing effect.

[0056] Example 7 is an improvement on Example 6. The similarities will not be repeated here; the differences are as follows: The water inlet of the first filter element 1 is connected to a mechanical water purification switch 26. By adding the mechanical water purification switch 26, the water inlet control is achieved.

[0057] The wastewater circuit also includes a wastewater solenoid valve 28, a wastewater branch check valve 29, and a drain interface 30. The inlet of the wastewater solenoid valve 28 is connected to the inlet of the wastewater proportional valve 14, the outlet of the wastewater solenoid valve 28 is connected to the inlet of the wastewater branch check valve 29, and the outlet of the wastewater branch check valve 29 is connected to the inlet of the wastewater check valve 16. A drain interface 30 is connected to the pipeline between the wastewater solenoid valve 28 and the wastewater branch check valve 29. The inlet of the wastewater faucet 21 is connected to an automatic on / off water supply valve 31.

[0058] The main function of the wastewater solenoid valve 28 is to drain the water after a short-term flush of the RO reverse osmosis membrane filter element (this mode has a smaller drainage volume). The wastewater can be discharged into the wastewater storage pressure tank 27 through the wastewater solenoid valve 28, the wastewater branch check valve 29, and the wastewater check valve 16 in sequence; or the wastewater can be discharged through the wastewater solenoid valve 28 and the drain interface 30 in sequence.

[0059] The automatic wastewater supply switch valve 31 is installed to facilitate the discharge of wastewater into the water supply path, such as in the application scenarios of electric mop washbasins and automatic flower pots.

[0060] Example 8 is an improvement on Example 7. The similarities will not be repeated here; the differences are as follows: It also includes a wastewater filter cartridge 35, which is connected in series in the pipeline between the RO reverse osmosis membrane cartridge 7 and the wastewater proportional valve 14.

[0061] Adding wastewater filter element 35 filters the wastewater, improving the cleanliness of the effluent and meeting the needs of different usage scenarios.

[0062] Example 9 is an improvement on Example 3. The similarities will not be repeated here; the differences are as follows: The water inlet of the first filter element 1 is connected to a mechanical water purification switch 26. By adding the mechanical water purification switch 26, the water inlet control is achieved.

[0063] The wastewater circuit also includes a wastewater solenoid valve 28, a wastewater branch check valve 29, and a drain interface 30. The inlet of the wastewater solenoid valve 28 is connected to the inlet of the wastewater proportional valve 14, the outlet of the wastewater solenoid valve 28 is connected to the inlet of the wastewater branch check valve 29, the outlet of the wastewater branch check valve 29 is connected to the inlet of the wastewater check valve 16, and a drain interface 30 (with a dedicated plug in the prior art) is connected to the pipeline between the wastewater solenoid valve 28 and the wastewater branch check valve 29.

[0064] It also includes a backup water circuit, a wastewater branch control switch 32 (the wastewater branch control switch 32 can be a pressure switch sensor), and an end pressure tank 34. The backup water circuit includes a water shut-off solenoid valve 33 and a collection outlet 36. The inlet of the water shut-off solenoid valve 33 is connected to the outlet of the mechanical water purification switch 26, and the outlet of the water shut-off solenoid valve 33 is connected to the inlet of the collection outlet 36. The inlet of the collection outlet 36 is connected to the inlet of the wastewater faucet 21. The inlet and outlet pipes of the end pressure tank 34 (this is prior art and will not be described in detail here) are connected to the pipes between the wastewater faucet 21 and the collection outlet 36. The wastewater branch control switch 32 is connected to the pipe between the wastewater high-pressure switch 18 and the end pressure tank 34.

[0065] Add a backup water circuit, with the water shut-off solenoid valve 33 in a continuously closed state. The wastewater branch control switch 32 can be a high-pressure switch or a low-pressure switch (configured according to actual usage needs). Wastewater can be discharged through the branch circuit via the end pressure tank 34 (optional) and the collection outlet 36. When there is a lack of wastewater, the water shut-off solenoid valve 33 can be turned on to directly draw water from the water circuit at the front end of the mechanical water purification switch 26.

[0066] Adding a backup water circuit and wastewater branch circuit control switch 32 allows for flexible adjustment of the wastewater and backup water circuits as needed, making operation convenient.

[0067] Wastewater high-pressure switch 18 and water purification high-pressure switch 11 include four logic states: Logic state A: Wastewater high-pressure switch 18 and water purification high-pressure switch 11 are simultaneously turned on; Logic state B: Wastewater high-pressure switch 18 and clean water high-pressure switch 11 are both disconnected; Logic state C: Wastewater high-pressure switch 18 is on, and clean water high-pressure switch 11 is off; Logic state D: Wastewater high-pressure switch 18 is open, and clean water high-pressure switch 11 is on.

[0068] When both the wastewater high-pressure switch 18 and the water purification high-pressure switch 11 are in logic state A, both switches are simultaneously turned on. At this time, the inlet booster pump 6 works, and the water purifier produces purified water.

[0069] When the water faucet 13 is opened, if the water pressure in the water storage tank 12 is higher than the disconnection value of the water pressure switch 11, and the water pressure when the wastewater faucet 21 is closed is higher than the disconnection value of the wastewater pressure switch 18, then the system is in logic state B. Under the influence of water pressure, purified water flows out from the water storage tank 12. At this time, the water pressure switch 11 is not activated, and the wastewater pressure switch 18 is also not activated because the wastewater faucet 21 is not open. Therefore, the inlet booster pump 6 does not work, and the water purifier neither produces purified water nor wastewater. When the water pressure in the purified water storage tank 12 drops to a certain value, the purified water high-pressure switch 11 is activated. At this time, the wastewater circuit has no water usage or the water usage is insufficient to reduce the pressure to the level that would cause the wastewater high-pressure switch 18 to disconnect, thus forming logic state D. At this time, the inlet booster pump 6 is still not working, and the water purifier neither produces purified water nor wastewater. Only when the wastewater faucet 21 is also opened to use wastewater, or when the wastewater is automatically used by the system's wastewater intake equipment, and the wastewater circuit pressure meets the activation pressure of the wastewater high-pressure switch 18, does logic state A occur, and the water purifier starts working, producing purified water and wastewater simultaneously. Regardless of whether the purified water faucet 13 or the wastewater faucet 21 closes first, as the pressure in the purified water circuit and the wastewater circuit rises respectively, when the wastewater circuit pressure reaches a certain value first, the wastewater high-pressure switch 18 closes first, again forming logic D. Conversely, when the purified water circuit reaches a certain pressure before the wastewater circuit, the purified water high-pressure switch 11 closes first, forming logic C; and vice versa. Under water pressure, wastewater flows out from the wastewater storage pressure tank 27. At this time, neither the purified water high-pressure switch 11 nor the wastewater high-pressure switch 18 is turned on, the inlet booster pump 6 does not work, and the water purifier does not produce purified water or wastewater. When the water pressure in the wastewater storage pressure tank 27 is lower than a certain value, the wastewater high-pressure switch 18 is turned on, and logic state C is formed. Until the wastewater storage is used up, as long as the purified water or membrane washing water circuit is not turned on, the water purifier will not produce water, thus achieving the water-saving function of controlling the operation of the water purifier by wastewater.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wastewater-controlled water purifier, characterized in that, The system includes a front-end filtration module, an inlet booster pump, an RO reverse osmosis membrane filter element, a purified water circuit, and a wastewater circuit. The outlet of the front-end filtration module is connected to the inlet of the inlet booster pump, and the outlet of the inlet booster pump is connected to the inlet of the RO reverse osmosis membrane filter element. The purified water circuit includes a purified water check valve, a purified water high-pressure switch, a purified water storage pressure tank, and a purified water faucet. The purified water outlet of the RO reverse osmosis membrane filter element is connected to the inlet of the purified water check valve, and the outlet of the purified water check valve is connected to the inlet of the purified water faucet. The inlet and outlet pipes of the purified water storage pressure tank are connected to the purified water check valve and the purified water faucet. The pipelines between the two are connected, and the high-pressure switch for purified water is connected to the pipeline between the purified water check valve and the purified water storage pressure tank; the wastewater circuit includes a wastewater proportional valve, a wastewater check valve, a wastewater high-pressure switch, and a wastewater faucet; the wastewater outlet of the RO reverse osmosis membrane filter is connected to the inlet of the wastewater proportional valve, the outlet of the wastewater proportional valve is connected to the inlet of the wastewater check valve, and the outlet of the wastewater check valve is connected to the inlet of the wastewater faucet; the wastewater high-pressure switch is connected to the pipeline between the wastewater check valve and the wastewater faucet; the wastewater high-pressure switch and the purified water high-pressure switch circuit are connected in series.

2. The wastewater-controlled water purifier according to claim 1, characterized in that, The front-end filtration module includes a first filter element, an inlet solenoid valve, a second filter element, a third filter element, and a fourth filter element. The water outlet of the first filter element is connected to the water inlet of the inlet solenoid valve, the water outlet of the inlet solenoid valve is connected to the water inlet of the second filter element, the water outlet of the second filter element is connected to the water inlet of the third filter element, the water outlet of the third filter element is connected to the water inlet of the fourth filter element, and the water outlet of the fourth filter element is connected to the water inlet of the inlet booster pump.

3. The wastewater-controlled water purifier according to claim 2, characterized in that, The wastewater circuit also includes a wastewater storage pressure tank, and the inlet and outlet pipes of the wastewater storage pressure tank are connected to the pipelines between the wastewater check valve and the wastewater high-pressure switch.

4. The wastewater-controlled water purifier according to claim 3, characterized in that, The purified water circuit also includes a fifth filter element and a purified water storage pressure tank. The purified water outlet of the RO reverse osmosis membrane filter element is connected to the inlet of the fifth filter element, and the outlet of the fifth filter element is connected to the inlet of the purified water check valve. The inlet and outlet pipes of the purified water storage pressure tank are connected to the pipes between the RO reverse osmosis membrane filter element and the fifth filter element. The first filter element is a PP filter element, the second filter element is an inlet activated carbon filter element, the third filter element is a sintered activated carbon filter element, the fourth filter element is a UF ultrafiltration filter element, and the fifth filter element is a purified activated carbon filter element.

5. The wastewater-controlled water purifier according to any one of claims 2-4, characterized in that, It also includes a membrane washing wastewater circuit, which includes a membrane washing wastewater check valve, a membrane washing wastewater high-pressure switch, and a membrane washing wastewater faucet. The wastewater outlet of the RO reverse osmosis membrane filter element is connected to the inlet of the membrane washing wastewater check valve, and the outlet of the membrane washing wastewater check valve is connected to the inlet of the membrane washing wastewater faucet. The membrane washing wastewater high-pressure switch is located on the pipeline between the membrane washing wastewater check valve and the membrane washing wastewater faucet. The membrane washing wastewater circuit also includes a membrane washing wastewater control valve and a membrane washing wastewater low-pressure switch. The wastewater outlet of the RO reverse osmosis membrane filter element is connected to the inlet of the membrane washing wastewater control valve, and the outlet of the membrane washing wastewater control valve is connected to the inlet of the membrane washing wastewater check valve. The membrane washing wastewater low-pressure switch is connected to the pipeline between the membrane washing wastewater check valve and the membrane washing wastewater high-pressure switch.

6. The wastewater-controlled water purifier according to any one of claims 4-5, characterized in that, The water inlet of the first filter element is connected to a mechanical water purification switch.

7. The wastewater-controlled water purifier according to any one of claims 4-6, characterized in that, The wastewater circuit also includes a wastewater solenoid valve, a wastewater branch check valve, and a drain interface. The inlet of the wastewater solenoid valve is connected to the inlet of the wastewater proportional valve, the outlet of the wastewater solenoid valve is connected to the inlet of the wastewater branch check valve, and the outlet of the wastewater branch check valve is connected to the inlet of the wastewater check valve. A drain interface is connected to the pipeline between the wastewater solenoid valve and the wastewater branch check valve. The inlet of the wastewater faucet is connected to an automatic on / off water supply valve.

8. The wastewater-controlled water purifier according to any one of claims 7, characterized in that, It also includes a wastewater filter cartridge, which is connected in series in the pipeline between the RO reverse osmosis membrane cartridge and the wastewater proportional valve.

9. The wastewater-controlled water purifier according to claim 6, characterized in that, It also includes a backup water circuit, a wastewater branch control switch, and an end pressure tank. The backup water circuit includes a water shut-off solenoid valve and a collection outlet. The water inlet of the water shut-off solenoid valve is connected to the water outlet of the mechanical water purification switch, the water outlet of the water shut-off solenoid valve is connected to the water inlet of the collection outlet, and the water inlet of the collection outlet is connected to the water inlet of the wastewater faucet. The inlet and outlet pipes of the end pressure tank are connected to the pipes between the wastewater faucet and the collection outlet. The wastewater branch control switch is connected to the pipes between the wastewater high-pressure switch and the end pressure tank.

10. A control method for a wastewater-controlled water purifier based on any one of claims 3-9, characterized in that, The wastewater high-pressure switch and the purified water high-pressure switch include four logic states: Logic state A: The wastewater high-pressure switch and the clean water high-pressure switch are both turned on simultaneously; Logic state B: The wastewater high-pressure switch and the clean water high-pressure switch are both disconnected. Logic state C: Wastewater high-pressure switch is on, purified water high-pressure switch is off; Logic state D: Wastewater high-pressure switch is off, clean water high-pressure switch is on; When both the wastewater high-pressure switch and the water purification high-pressure switch are in logic state A, both switches are simultaneously turned on. At this time, the inlet booster pump works, and the water purifier produces purified water. When the water purifier faucet is opened, if the water pressure in the water purifier's storage tank is higher than the pressure cutoff value of the water purifier's high-pressure switch, and the water pressure when the wastewater faucet is closed is higher than the pressure cutoff value of the wastewater high-pressure switch, this is logic state B. Under the influence of water pressure, purified water flows out from the water purifier's storage tank. At this time, the water purifier's high-pressure switch is not activated, and the wastewater high-pressure switch is also not activated because the wastewater faucet is not open. The inlet booster pump does not work, and the water purifier neither produces purified water nor wastewater. When the water pressure in the water purifier's storage tank drops to a certain value, the water purifier's high-pressure switch is activated. At this time, the wastewater circuit does not use water or the water usage is insufficient to reduce the pressure to the level that would cause the wastewater high-pressure switch to deactivate, thus forming logic state D. At this time, the inlet booster pump still does not work, and the water purifier neither produces purified water nor wastewater. Only when the wastewater faucet is also opened and wastewater is used, or when the wastewater is automatically used by the system's wastewater intake equipment, and the wastewater circuit pressure also meets the pressure required for the wastewater high-pressure switch to activate, will the system return to logic state D. When the water purifier starts working, it enters logic state A, producing both purified and wastewater simultaneously. Regardless of which faucet closes first, the pressure in both the purified and wastewater circuits increases. If the wastewater pressure reaches a certain value first, the high-pressure switch closes first, resulting in logic state D. Conversely, if the purified water pressure reaches a certain value first, the high-pressure switch closes first, resulting in logic state C. The reverse is also true. When the wastewater faucet is opened first, wastewater flows from the wastewater storage tank under pressure. At this time, neither the purified nor wastewater high-pressure switches are activated, the inlet booster pump does not work, and the purifier neither produces purified water nor wastewater. When the water pressure in the wastewater storage tank drops below a certain value, the high-pressure switch activates, resulting in logic state C. The purifier will not produce water until the wastewater storage tank is depleted, as long as the purified or membrane washing water circuits are not opened, thus achieving a water-saving function by controlling the purifier's operation with wastewater.

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