Reverse osmosis water purification system and wastewater treatment method thereof

Abstract

The invention relates to the field of integrated water household appliances, in particular to a reverse osmosis water purification system and a wastewater treatment method thereof.The system comprises a tap water inlet, a domestic water outlet, a domestic water pipeline, a water purification module, a booster pump, a drinking water outlet, a water storage tank and a one-way valve; the tap water inlet is connected with the living water outlet through a living water pipeline; the water inlet end of the booster pump is connected with the water outlet end of the water storage tank, the water outlet end of the booster pump is connected with the water inlet end of the water purification module, and the purified water outlet end of the water purification module is connected with the drinking water outlet; the wastewater outlet end of the water purification module is connected with the first end of the one-way valve, the second end of the one-way valve is connected with the wastewater inlet end of the water storage tank, the living water inlet end of the water storage tank is connected with the tap water inlet, and the living water outlet end of the water storage tank is connected with the living water outlet through a living water pipeline; no additional water storage equipment is needed, backflow recycling of the wastewater is achieved, and the utilization rate of water resources is increased.

Description

Technical Field

[0001] This application relates to the technical field of integrated water-using household appliances, and particularly to a reverse osmosis water purification system and a wastewater treatment method thereof. Background Art

[0002] During the operation of traditional reverse osmosis water purifiers, the problem of wastewater discharge inevitably occurs. These wastewaters are usually directly discharged, which not only increases the waste rate of water resources but also is not conducive to responding to the national water-saving policy.

[0003] Some users, in order to save water resources, will lead the wastewater pipe to an additional water storage device to collect wastewater for uses such as flushing toilets.

[0004] However, this method has some obvious deficiencies: after the water storage tank is full, users need to manually discharge it regularly, which is cumbersome and results in a poor user experience; in addition, the large-flow reverse osmosis water purifier generates a large amount of wastewater, and the required volume of the water storage device also increases accordingly, occupying a relatively large space; moreover, the undiluted wastewater directly used has limited usage scenarios and cannot be widely applied to other occasions that require clean water sources. Summary of the Invention

[0005] This application provides a reverse osmosis water purification system and a wastewater treatment method thereof, which can realize the recycling of wastewater without additional water storage devices and improve the utilization rate of water resources.

[0006] In a first aspect, this application provides a reverse osmosis water purification system, including: a tap water inlet, a domestic water outlet, a domestic water pipeline, a water purification module, a booster pump, a drinking water outlet, a water storage tank, and a check valve; wherein, the tap water inlet is connected to the domestic water outlet through the domestic water pipeline; the inlet end of the booster pump is connected to the outlet end of the water storage tank, the outlet end of the booster pump is connected to the inlet end of the water purification module, and the purified water outlet end of the water purification module is connected to the drinking water outlet; the wastewater outlet end of the water purification module is connected to the first end of the check valve, the second end of the check valve is connected to the wastewater inlet end of the water storage tank, the domestic water inlet end of the water storage tank is connected to the tap water inlet; the domestic water outlet end of the water storage tank is connected to the domestic water outlet through the domestic water pipeline.

[0007] In a possible implementation manner, a reverse osmosis water purification system provided by this application further includes a first solenoid valve and a second solenoid valve; wherein, the first end of the first solenoid valve is connected to the tap water inlet, and the second end of the first solenoid valve is connected to the inlet end of the water storage tank; the first end of the second solenoid valve is connected to the outlet end of the booster pump, and the second end of the second solenoid valve is connected to the inlet end of the water purification module.

[0008] In a possible implementation, a reverse osmosis water purification system provided by the present application further includes a third solenoid valve and a high-pressure switch module; wherein, a first end of the third solenoid valve is connected to a wastewater outlet end of the water purification module, and a second end of the third solenoid valve is connected to a first end of the check valve; the high-pressure switch module is arranged at a purified water outlet end of the water purification module.

[0009] In a possible implementation, a reverse osmosis water purification system provided by the present application further includes a fourth solenoid valve, a fifth solenoid valve and a sewer drain; wherein, a first end of the fourth solenoid valve is connected to a first wastewater outlet end of the water storage tank, and a second end of the fourth solenoid valve is connected to the sewer drain; a first end of the fifth solenoid valve is connected to a domestic water outlet end of the water storage tank, and a second end of the fifth solenoid valve is connected to the domestic water outlet through the domestic water pipeline.

[0010] In a possible implementation, a liquid level sensor is arranged inside the water storage tank, and an exhaust port is arranged at the top of the water storage tank.

[0011] In a second aspect, the present application provides a wastewater treatment method for a reverse osmosis water purification system, which is applicable to the reverse osmosis water purification system described in any one of the above, and the wastewater treatment method includes: obtaining the current water usage mode, and when the current water usage mode is not a preset target water usage mode, obtaining the liquid level height of the water storage tank, wherein the preset target water usage mode is a domestic water off and drinking water off mode; based on the current water usage mode and the liquid level height, controlling the on-off states of the first solenoid valve, the fifth solenoid valve and the water purification unit, so as to discharge the water in the water storage tank through the domestic water pipeline; wherein, the water purification unit includes a booster pump, a second solenoid valve, a water purification module, a third solenoid valve and a check valve.

[0012] In a possible implementation, based on the current water usage mode and the liquid level height, controlling the on-off states of the first solenoid valve, the fifth solenoid valve and the water purification unit, so as to discharge the water in the water storage tank through the domestic water pipeline, specifically includes: when the current water usage mode is a domestic water off and drinking water on mode, controlling the water purification unit to be turned on, and controlling the first solenoid valve to be turned on and the fifth solenoid valve to be turned off; when it is detected that the liquid level height is a full water level height, controlling the first solenoid valve and the fifth solenoid valve to be turned off, so as to make the water in the water storage tank flow through the domestic water pipeline to the drinking water outlet, until it is detected that the liquid level height is a preset low liquid level height, controlling the first solenoid valve to be turned on and the fifth solenoid valve to be turned off, until it is detected again that the liquid level height is the full water level height.

[0013] In a possible implementation, when the current water usage mode is the domestic water off and drinking water on mode, it further includes: detecting whether the total dissolved solids concentration in the water storage tank meets a preset total dissolved solids concentration threshold, and if so, controlling the fourth solenoid valve to open so that the water in the water storage tank flows through the domestic water pipeline to the sewer drain outlet.

[0014] In a possible implementation, based on the current water usage mode and the liquid level height, control the on / off states of the first solenoid valve, the fifth solenoid valve, and the water purification unit so that the water in the water storage tank is discharged through the domestic water pipeline. Specifically, it includes: when the current water usage mode is the domestic water on and drinking water on mode, control the water purification unit to open, and control the first solenoid valve to open and the fifth solenoid valve to close; when detecting whether the liquid level height is the full water level height, if so, control the first solenoid valve and the fifth solenoid valve to close so that the water in the water storage tank flows through the domestic water pipeline to the drinking water outlet, until detecting that the liquid level height is the preset low liquid level height, control the first solenoid valve to open and the fifth solenoid valve to open so that the water in the water storage tank flows through the domestic water pipeline to the domestic water outlet, until detecting again that the liquid level height is the full water level height, control the first solenoid valve to open and the fifth solenoid valve to close.

[0015] In a possible implementation, based on the current water usage mode and the liquid level height, control the on / off states of the first solenoid valve, the fifth solenoid valve, and the water purification unit so that the water in the water storage tank is discharged through the domestic water pipeline. Specifically, it includes: when the current water usage mode is the domestic water on and drinking water off mode, control the water purification unit to close, and control the first solenoid valve to open and the fifth solenoid valve to open so that the water in the water storage tank flows through the domestic water pipeline to the domestic water outlet.

[0016] The embodiments of the present application provide a reverse osmosis water purification system and its wastewater treatment method, which have the following advantages compared with the prior art: A reverse osmosis water purification system provided by the present application includes: a tap water inlet, a domestic water outlet, a domestic water pipe, a water purification module, a booster pump, a drinking water outlet, a water storage tank, and a check valve; when the user has a demand for domestic water, the tap water inlet is connected to the domestic water outlet through the domestic water pipe; so that domestic water can directly flow out from the domestic water outlet through the domestic water pipe, providing stable domestic water for the user; when the user has a demand for drinking water, the water in the water storage tank can be directly used as the raw water for filtration, the inlet end of the booster pump is connected to the outlet end of the water storage tank, the outlet end of the booster pump is connected to the inlet end of the water purification module, and the purified water outlet end of the water purification module is connected to the drinking water outlet, so that the water in the water storage tank flows out directly from the drinking water outlet after being purified by the water purification module, providing safe and healthy drinking water for the user; and the wastewater outlet end of the water purification module is connected to the first end of the check valve, the second end of the check valve is connected to the wastewater inlet end of the water storage tank, and the domestic water inlet end of the water storage tank is connected to the tap water inlet, so that the wastewater generated by the water purification module flows into the water storage tank through the check valve, is pressurized by the booster pump and then enters the water purification module again for filtration, realizing the recycling of wastewater, improving the utilization rate of water resources, avoiding the problem in the prior art that additional water storage equipment is needed to collect wastewater and manual discharge of used wastewater is required regularly and frequently, saving time, greatly reducing the volume of the water storage equipment, saving space, and at the same time not needing to add additional booster equipment to dilute and mix the wastewater into the raw water, saving costs; at the same time, the domestic water outlet end of the water storage tank is connected to the domestic water outlet through the domestic water pipe, and the wastewater in the water storage tank can also be discharged along with the domestic water and can be reused after being diluted by the domestic water, reducing the direct discharge of wastewater and realizing the reuse of wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention and, together with the specification, are used to explain the principles of the present invention.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] One or more embodiments are exemplarily illustrated by the pictures in the corresponding accompanying drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the drawings do not constitute a proportional limitation.

[0020] Figure 1 It is a schematic structural diagram of an embodiment of a reverse osmosis water purification system provided by this application; Figure 2 It is a schematic flow diagram of an embodiment of a waste water treatment method for a reverse osmosis water purification system provided by this application.

[0021] Explanation of the reference numerals in the drawings: Tap water inlet 1, domestic water outlet 2, domestic water pipe 3, water purification module 4, booster pump 5, drinking water outlet 6, water storage tank 7, check valve 8, first solenoid valve 9, second solenoid valve 10, third solenoid valve 11, high pressure switch module 12, fourth solenoid valve 13, fifth solenoid valve 14, sewer drain outlet 15, liquid level sensor 16 and exhaust port 17. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0023] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure of this application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit this application. In addition, this application may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0024] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0025] It should also be understood that the terms used in this specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. As used in this specification of this application and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0026] It should be further understood that the term "and / or" as used in the specification and appended claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] As used in this specification and the appended claims, the term "if" may be construed, depending on the context, as "when...", "once", "in response to determining", or "in response to detecting". Similarly, the phrases "if determined" or "if [the described condition or event] is detected" may be construed, depending on the context, as meaning "once determined", "in response to determining", "once [the described condition or event] is detected", or "in response to detecting [the described condition or event]". Example 1, see Figure 1 , Figure 1 is a schematic structural diagram of an embodiment of a reverse osmosis water purification system provided by the present application. As Figure 1 shown, the reverse osmosis water purification system includes a tap water inlet 1, a domestic water outlet 2, a domestic water pipe 3, a water purification module 4, a booster pump 5, a drinking water outlet 6, a water storage tank 7, and a check valve 8, specifically as follows: In one embodiment, the tap water inlet 1 is connected to the domestic water outlet 2 through the domestic water pipe 3.

[0028] Specifically, during the daily use of tap water, such as in scenarios like washing hands, washing vegetables, and mopping the floor, after the tap water enters from the tap water inlet 1, it can directly flow out through the domestic water outlet 2 via the domestic water pipe 3, ensuring the timeliness and stability of domestic water use.

[0029] Specifically, a domestic water faucet is further provided at the domestic water outlet 2 for discharging domestic water.

[0030] In one embodiment, the reverse osmosis water purification system further includes a first solenoid valve 9; wherein, a first end of the first solenoid valve 9 is connected to the tap water inlet 1, and a second end of the first solenoid valve 9 is connected to an inlet end of the water storage tank 7.

[0031] Specifically, the function of the first solenoid valve 9 is to control the flow rate of tap water entering the water storage tank 7.

[0032] Specifically, when it is necessary to replenish water to the water storage tank 7, by opening the first solenoid valve 9, it is allowed that after the tap water enters from the tap water inlet 1, it flows into the water storage tank 7 through the first solenoid valve 9; when the water storage tank 7 is full or water replenishment is not required, the first solenoid valve 9 can also be closed to stop the tap water from flowing into the water storage tank 7, achieving the stop of water supply; this setting can prevent the water storage tank 7 from being always full of water, resulting in the inability of waste water to flow into the water storage tank 7.

[0033] In one embodiment, a liquid level sensor 16 is provided inside the water storage tank 7.

[0034] Specifically, the liquid level sensor 16 can monitor the water level height in the water storage tank 7 in real time, provide accurate water level information, and according to the feedback of the liquid level sensor 16, the system can automatically control the opening or closing of the first solenoid valve 9 to prevent the water storage tank 7 from being always full of water, resulting in the waste water being unable to flow into the water storage tank 7.

[0035] In one embodiment, an exhaust port 17 is provided at the top of the water storage tank 7.

[0036] Specifically, an exhaust port device is provided at the exhaust port 17 of the water storage tank 7. When the water storage tank 7 is full of water, the exhaust port device will automatically block the exhaust port 17. When the water storage tank 7 is not full of water, the exhaust port device will automatically descend with the water level and then open the exhaust port 17 to make the exhaust port 17 communicate with the outside.

[0037] Specifically, the exhaust port 17 at the top of the water storage tank 7 is used to balance the air pressure inside and outside the tank, preventing the water flow from being blocked or the system pressure from being abnormal due to the air pressure change. When the water level in the water storage tank 7 drops, the exhaust port device will automatically descend with the water level. Opening the exhaust port 17 can make the waste water flow smoothly into the water storage tank 7. When the water level in the water storage tank 7 rises until it is full of water, the exhaust port device will automatically block the exhaust port 17, enabling the water in the water storage tank 7 to flow through the domestic water pipeline 3 to the domestic water outlet 2.

[0038] In one embodiment, the inlet end of the booster pump 5 is connected to the outlet end of the water storage tank 7, the outlet end of the booster pump 5 is connected to the inlet end of the water purification module 4, and the purified water outlet end of the water purification module 4 is connected to the drinking water outlet 6.

[0039] In one embodiment, the reverse osmosis water purification system further includes a second solenoid valve 10. Among them, the first end of the second solenoid valve 10 is connected to the outlet end of the booster pump 5, and the second end of the second solenoid valve 10 is connected to the inlet end of the water purification module 4.

[0040] Specifically, a drinking water faucet is provided at the drinking water outlet 6.

[0041] Specifically, the function of the booster pump 5 is to provide power for the water flow, pressurize the water in the water storage tank 7 and then transport it to the water purification module 4. This is because the water purification module 4 requires a certain pressure to push water molecules through the RO membrane, so as to realize the filtration of impurities and dissolved solids in the water.

[0042] Specifically, the water purification module 4 is used to filter and purify the incoming water flow, and provide water meeting the drinking standard for users.

[0043] Specifically, the water purification module 4 contains an RO filter element. The filter element can have different compositions and can be divided into one core, two cores, three cores, etc., and the number of filter elements is not limited. Specifically, the second solenoid valve 10 is used to control the water flow pressurized by the booster pump 5 to flow to the water purification module 4; by controlling the opening and closing of the second solenoid valve 10, precise control of the water inlet of the water purification module 4 is achieved.

[0044] Specifically, the water storage tank 7 is used to store raw water, usually tap water, and may also collect pre-treated water or wastewater.

[0045] Specifically, the water inlet end of the booster pump 5 is connected to the water outlet end of the water storage tank 7 through a pipeline to ensure that the water in the water storage tank 7 can smoothly enter the booster pump 5; the water outlet end of the booster pump 5 is connected to the first end of the second solenoid valve 10 through a pipeline, and the second end of the second solenoid valve 10 is connected to the water inlet end of the water purification module 4 through a pipeline to control the on-off of the water flow entering the water purification module 4; the purified water outlet end of the water purification module 4 is connected to the drinking water outlet 6 through a pipeline to deliver the purified water to the drinking water faucet.

[0046] Specifically, when the system starts and the water level in the water storage tank 7 is insufficient, the first solenoid valve 9 opens, and tap water enters the water storage tank 7 through the domestic water pipeline 3 until the water storage tank 7 is full, and the first solenoid valve 9 closes. When it is necessary to produce drinking water, the booster pump 5 starts to pump out and pressurize the water in the water storage tank 7; the pressurized water flows to the second solenoid valve 10 and flows into the water purification module 4 through the second solenoid valve 10 for purification treatment, and the purified water is output from the drinking water outlet 6, ensuring the user's demand for drinking water.

[0047] In one embodiment, the reverse osmosis water purification system further includes a high-pressure switch module 12; wherein, the high-pressure switch module 12 is arranged at the purified water outlet end of the water purification module 4.

[0048] Specifically, the high-pressure switch module 12 is used to detect the pressure at the water outlet end of the water purification module 4. When the detected pressure reaches or exceeds the preset threshold, it controls the second solenoid valve 10 and the booster pump 5 to close; it can effectively prevent the system from being damaged due to high pressure, extend the service life of the equipment, and improve the safety of the system at the same time.

[0049] In one embodiment, the wastewater outlet end of the water purification module 4 is connected to the first end of the check valve 8, the second end of the check valve 8 is connected to the wastewater inlet end of the water storage tank 7, and the domestic water inlet end of the water storage tank 7 is connected to the tap water inlet 1.

[0050] In one embodiment, the reverse osmosis water purification system further includes a third solenoid valve 11. The first end of the third solenoid valve 11 is connected to the wastewater outlet end of the water purification module 4, and the second end of the third solenoid valve 11 is connected to the first end of the one-way valve 8.

[0051] Specifically, the one-way valve 8 is used to ensure that wastewater can only flow from the water purification module 4 to the water storage tank 7, prevent the water in the water storage tank 7 from flowing back to the water purification module 4, and avoid polluting the water purification module 4 or affecting its normal operation.

[0052] Specifically, the third solenoid valve 11 is used to control the flow direction of wastewater in the water purification module 4. By controlling the opening and closing of the third solenoid valve 11, it is determined whether the wastewater enters the water storage tank 7.

[0053] Specifically, since wastewater is generated during the filtration process of the water purification module 4, by connecting the wastewater outlet end of the water purification module 4 to the first end of the third solenoid valve 11 through a pipeline; connecting the second end of the third solenoid valve 11 to the first end of the one-way valve 8 through a pipeline; connecting the second end of the one-way valve 8 to the wastewater inlet end of the water storage tank 7 through a pipeline, the wastewater can be re-introduced into the water storage tank 7 through the third solenoid valve 11 and the one-way valve 8, and can be used again as the raw water for filtration after dilution in the water storage tank 7, significantly reducing water resource waste.

[0054] In one embodiment, the reverse osmosis water purification system further includes a fourth solenoid valve 13 and a sewer drain 15. Among them, the first end of the fourth solenoid valve 13 is connected to the first wastewater outlet end of the water storage tank 7, and the second end of the fourth solenoid valve 13 is connected to the sewer drain 15.

[0055] Specifically, the fourth solenoid valve 13 is used to control the on-off of the flow of wastewater from the water storage tank 7 to the drain. When wastewater needs to be discharged, the fourth solenoid valve 13 is opened, and the wastewater flows into the sewer through the fourth solenoid valve 13; when wastewater does not need to be discharged, the fourth solenoid valve 13 is closed to prevent the wastewater from flowing out.

[0056] Specifically, connect the first end of the fourth solenoid valve 13 to the first wastewater outlet end of the water storage tank 7 through a pipeline; connect the second end of the fourth solenoid valve 13 to the sewer drain 15 through a pipeline.

[0057] Specifically, in the embodiment of the reverse osmosis water purification system, the fourth solenoid valve 13 and the sewer drain 15 are provided to provide a path for wastewater discharge, so that the wastewater in the water storage tank 7 can be directly discharged into the sewer when needed; this setting increases the flexibility and adaptability of the system, especially in scenarios of dealing with water quality problems or system maintenance.

[0058] In one embodiment, the domestic water outlet end of the water storage tank 7 is connected to the domestic water outlet 2 through the domestic water pipeline 3.

[0059] In one embodiment, the reverse osmosis water purification system further includes a fifth solenoid valve 14. Among them, the first end of the fifth solenoid valve 14 is connected to the domestic water outlet end of the water storage tank 7, and the second end of the fifth solenoid valve 14 is connected to the domestic water outlet 2 through the domestic water pipeline 3.

[0060] Specifically, the fifth solenoid valve 14 is used to control the on-off of the wastewater flowing from the water storage tank 7 to the domestic water pipeline 3; when the wastewater needs to be used for domestic water purposes, the fifth solenoid valve 14 is opened, and the wastewater enters the domestic water pipeline 3 through the fifth solenoid valve 14 and is finally discharged from the domestic water outlet 2; when the wastewater does not need to be used for domestic water purposes, the fifth solenoid valve 14 is closed to prevent the wastewater from flowing into the domestic water pipeline 3.

[0061] Specifically, the first end of the fifth solenoid valve 14 is connected to the domestic water outlet end of the water storage tank 7 through a pipeline; the second end of the fifth solenoid valve 14 is connected to the domestic water pipeline 3 through a pipeline and is finally connected to the domestic water outlet 2.

[0062] Specifically, in the embodiment of the reverse osmosis water purification system, the fifth solenoid valve 14 is provided to provide a mechanism such that the wastewater in the water storage tank 7 can be discharged along with the domestic water and can be reused after being diluted by the domestic water; this setting further optimizes the utilization of water resources, reduces the direct discharge of wastewater, and realizes the reuse of wastewater.

[0063] Preferably, the reverse osmosis water purification system further includes a total dissolved solids concentration sensor (not shown in the figure); the total dissolved solids concentration sensor is built into the water storage tank 7.

[0064] Specifically, the total dissolved solids concentration in the water storage tank 7 is detected by the built-in total dissolved solids concentration sensor. When the total dissolved solids concentration in the water storage tank 7 meets the preset total dissolved solids concentration threshold, the fourth solenoid valve 13 is controlled to open to drain the water in the water storage tank 7 to the sewer; when the total dissolved solids concentration in the water storage tank 7 does not meet the preset total dissolved solids concentration threshold, the fourth solenoid valve 13 is controlled to close.

[0065] Embodiment 2, see Figure 2 , Figure 2 is a schematic flowchart of an embodiment of a wastewater treatment method for a reverse osmosis water purification system provided by the present application. As Figure 2 shown, the method includes Step 101 - Step 102, specifically as follows: Step 101: Obtain the current water usage mode. When the current water usage mode is not the preset target water usage mode, obtain the liquid level height of the water storage tank, where the preset target water usage mode is the mode of closing domestic water and closing drinking water.

[0066] In one embodiment, the set water usage modes include, but are not limited to, the mode of closing domestic water and closing drinking water, the mode of closing domestic water and opening drinking water, the mode of opening domestic water and opening drinking water, and the mode of opening domestic water and closing drinking water.

[0067] Specifically, since no wastewater is generated when the current water usage mode is the mode of closing domestic water and closing drinking water, in this water usage mode, it is not necessary to control the on / off states of the first solenoid valve and the fifth solenoid valve to drain the water in the water storage tank through the domestic water pipeline.

[0068] In one embodiment, since a liquid level sensor is provided in the water storage tank, the liquid level height of the water storage tank can be directly detected and obtained based on the liquid level sensor.

[0069] Step 102: Based on the current water usage mode and the liquid level height, control the on / off states of the first solenoid valve, the fifth solenoid valve, and the water purification unit to drain the water in the water storage tank through the domestic water pipeline; where the water purification unit includes a booster pump, a second solenoid valve, a water purification module, a third solenoid valve, and a check valve.

[0070] In one embodiment, when the current water usage mode is the mode of closing domestic water and opening drinking water, control the water purification unit to turn on, and control the first solenoid valve to turn on and the fifth solenoid valve to turn off; when detecting whether the liquid level height is the full water level height, if so, control the first solenoid valve and the fifth solenoid valve to turn off, so that the water in the water storage tank flows through the domestic water pipeline to the drinking water outlet, until detecting that the liquid level height is the preset low liquid level height, control the first solenoid valve to turn on and the fifth solenoid valve to turn off, until detecting again that the liquid level height is the full water level height.

[0071] Specifically, when the water purification unit is turned on, the first solenoid valve is turned on and the fifth solenoid valve is turned off. At this time, after the tap water flows in from the tap water inlet, it flows into the water storage tank through the opened first solenoid valve as the raw water for filtration. Since the water purification unit is turned on, that is, the booster pump, the second solenoid valve, the water purification module, the third solenoid valve and the check valve are all in the open state. At this time, the water in the water storage tank is pumped out by the booster pump and flows into the water purification unit through the second solenoid valve for purification treatment. The purified water flows out through the drinking water outlet to meet the drinking water needs of users. At the same time, the wastewater generated by the water purification module flows back into the water storage tank through the third solenoid valve and the check valve, realizing the recycling of wastewater. At the same time, the fifth solenoid valve is closed to cut off the water connection between the water storage tank and the domestic water pipeline, realizing the function of closing the domestic water.

[0072] Specifically, due to the limited space of the water storage tank, therefore, in combination with the detected liquid level height in the water storage tank, when the liquid level height reaches the full water level height, the system automatically closes the first solenoid valve to prevent the water storage tank from being always full and causing the wastewater to be unable to flow into the water storage tank; when the liquid level of the water storage tank drops to the preset low liquid level height, the system automatically opens the first solenoid valve to replenish water to the full water level height again. During this process, the system continuously monitors the liquid level height and automatically adjusts the opening and closing state of the first solenoid valve according to the liquid level change. Specifically, when it is detected that the liquid starts to drop from the full water level height, the exhaust port in the water storage tank opens, which can enable the wastewater to flow smoothly into the water storage tank and ensure the normal use of the water purification module.

[0073] In one embodiment, when the current water use mode is the domestic water closed and drinking water open mode, it further includes: detecting whether the total dissolved solids concentration in the water storage tank meets the preset total dissolved solids concentration threshold. If so, control the fourth solenoid valve to open so that the water in the water storage tank flows through the domestic water pipeline to the sewer drain outlet.

[0074] Specifically, when the domestic water is not used for a long time, the total dissolved solids concentration of the water quality in the water storage tank may increase due to continuous circulation and filtration. Therefore, in order to ensure water quality safety and the normal operation of the system, by automatically detecting the total dissolved solids concentration in the water storage tank, if the total dissolved solids concentration reaches or exceeds the preset threshold, the system will automatically open the fourth solenoid valve to drain the water in the water storage tank to the sewer.

[0075] Specifically, the total dissolved solids concentration sensor can be built into the water storage tank, and the total dissolved solids concentration in the water storage tank is detected by the built-in total dissolved solids concentration sensor.

[0076] Specifically, when it is detected that the total dissolved solid concentration in the water storage tank does not meet the preset total dissolved solid concentration threshold, the fourth solenoid valve is controlled to close.

[0077] In one embodiment, when the current water usage mode is the mode where domestic water is turned on and drinking water is turned on, the water purification unit is controlled to turn on, and the first solenoid valve is controlled to turn on and the fifth solenoid valve is controlled to close; when it is detected whether the liquid level height is the full water level height, if so, the first solenoid valve and the fifth solenoid valve are controlled to close, so that the water in the water storage tank flows through the domestic water pipeline to the drinking water outlet, until it is detected that the liquid level height is the preset low liquid level height, the first solenoid valve is controlled to turn on and the fifth solenoid valve is controlled to turn on, so that the water in the water storage tank flows through the domestic water pipeline to the domestic water outlet, until it is detected again that the liquid level height is the full water level height, the first solenoid valve is controlled to turn on and the fifth solenoid valve is controlled to close.

[0078] Specifically, the difference between the mode where domestic water is turned on and drinking water is turned on and the mode where domestic water is turned off and drinking water is turned on is that when it is detected that the liquid level height is the preset low liquid level height, the fifth solenoid valve is controlled to turn on to realize the discharge of domestic water.

[0079] Specifically, when the water level in the water storage tank drops to the low liquid level height and it is detected that the total dissolved solid concentration in the water storage tank reaches or exceeds the preset threshold, the remaining water may affect the water quality due to long-term stay. By opening the first solenoid valve and the fifth solenoid valve, tap water flows into the water storage tank, and at the same time, the water in the water storage tank flows through the domestic water pipeline to the domestic water outlet for discharge; this can ensure that the water in the water storage tank is always fresh, avoid water quality deterioration, and the replaced water is discharged through the domestic water pipeline to realize the reuse of water resources.

[0080] In one embodiment, when the current water usage mode is the mode where domestic water is turned on and drinking water is turned off, the water purification unit is controlled to turn off, and the first solenoid valve is controlled to turn on and the fifth solenoid valve is controlled to turn on, so that the water in the water storage tank flows through the domestic water pipeline to the domestic water outlet.

[0081] Specifically, since the water purification unit is not enabled in the mode where domestic water is turned on and drinking water is turned off, that is, the booster pump, the second solenoid valve, the water purification module, the third solenoid valve and the one-way valve are all in the closed state. At this time, the water purification module does not operate, so no new wastewater is generated; at this time, the first solenoid valve and the fifth solenoid valve are opened, tap water flows into the water storage tank, and at the same time, the water in the water storage tank flows through the domestic water pipeline to the domestic water outlet for discharge, which can meet the domestic water usage needs of users while ensuring that the water in the water storage tank is always fresh.

[0082] The above reverse osmosis water purification system and its wastewater treatment device can implement the reverse osmosis water purification system and its wastewater treatment method of the above method embodiment. The optional items in the above method embodiment are also applicable to this embodiment and will not be elaborated here.

[0083] In several embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of each unit is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0084] The steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs. The units in the device embodiments of the present application can be combined, divided, and deleted according to actual needs. In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0085] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application.

[0086] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0087] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

[0088] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and these modifications or substitutions should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A reverse osmosis water purification system, characterized in that: include: Tap water inlet, domestic water outlet, domestic water pipeline, water purification module, booster pump, drinking water outlet, water storage tank and one-way valve; Wherein, the tap water inlet is connected to the domestic water outlet through the domestic water pipeline; The water inlet of the booster pump is connected to the water outlet of the water storage tank, the water outlet of the booster pump is connected to the water inlet of the water purification module, and the purified water outlet of the water purification module is connected to the drinking water outlet; The wastewater outlet of the water purification module is connected to the first end of the one-way valve, the second end of the one-way valve is connected to the wastewater inlet of the water storage tank, and the domestic water inlet of the water storage tank is connected to the tap water inlet; The domestic water outlet end of the water storage tank is connected to the domestic water outlet through the domestic water pipeline.

2. The reverse osmosis water purification system according to claim 1, characterized in that: Also includes a first solenoid valve and a second solenoid valve; Wherein, the first end of the first solenoid valve is connected to the tap water inlet, and the second end of the first solenoid valve is connected to the water inlet end of the water storage tank; The first end of the second solenoid valve is connected to the water outlet of the booster pump, and the second end of the second solenoid valve is connected to the water inlet of the water purification module.

3. The reverse osmosis water purification system according to claim 2, characterized in that: Also included is a third solenoid valve and a high-voltage switch module; Wherein, the first end of the third solenoid valve is connected to the wastewater outlet of the water purification module, and the second end of the third solenoid valve is connected to the first end of the one-way valve; The high-voltage switch module is arranged at the purified water outlet end of the water purification module.

4. The reverse osmosis water purification system according to claim 3, characterized in that: Also included is a fourth solenoid valve, a fifth solenoid valve and a sewer drain; Wherein, the first end of the fourth solenoid valve is connected to the first wastewater outlet of the water storage tank, and the second end of the fourth solenoid valve is connected to the sewer drain outlet; The first end of the fifth solenoid valve is connected to the domestic water outlet of the water storage tank, and the second end of the fifth solenoid valve is connected to the domestic water outlet through the domestic water pipeline.

5. The reverse osmosis water purification system according to claim 4, characterized in that: A liquid level sensor is arranged inside the water storage tank, and an exhaust port is arranged on the top of the water storage tank.

6. A method for treating wastewater from a reverse osmosis water purification system, characterized in that: Applicable to the reverse osmosis water purification system of claim 5, the wastewater treatment method comprises: Acquire a current water use mode, and when the current water use mode is not a preset target water use mode, acquire a liquid level height of the water storage tank, wherein the preset target water use mode is a living water off and drinking water off mode; Based on the current water use mode and the liquid level height, the switching states of the first solenoid valve, the fifth solenoid valve and the water purification unit are controlled to discharge the water in the water storage tank through the domestic water pipe; wherein the water purification unit includes a booster pump, a second solenoid valve, a water purification module, a third solenoid valve and a one-way valve.

7. A method for treating wastewater of a reverse osmosis water purification system according to claim 6, characterized in that: Based on the current water use mode and the liquid level height, the switch states of the first solenoid valve, the fifth solenoid valve and the water purification unit are controlled so that the water in the water storage tank is discharged through the domestic water pipeline, specifically including: When the current water use mode is a living water off and drinking water on mode, controlling the water purification unit to turn on, and controlling the first solenoid valve to turn on and the fifth solenoid valve to turn off; When detecting whether the liquid level height is the full water level height, if so, control the first solenoid valve and the fifth solenoid valve to be closed so that the water in the water storage tank flows to the drinking water outlet through the domestic water pipe, until the liquid level height is detected to be a preset low liquid level height, control the first solenoid valve to be opened and the fifth solenoid valve to be closed, until the liquid level height is detected to be the full water level height again.

8. A method for treating wastewater of a reverse osmosis water purification system according to claim 7, characterized in that: When the current water use mode is a mode in which domestic water is closed and drinking water is opened, the method further includes: Detect whether the total dissolved solids concentration in the water tank meets a preset total dissolved solids concentration threshold. If so, control the fourth solenoid valve to open so that the water in the water tank flows to the sewer outlet through the domestic water pipe.

9. A method for treating wastewater of a reverse osmosis water purification system according to claim 6, characterized in that: Based on the current water use mode and the liquid level height, the switch states of the first solenoid valve, the fifth solenoid valve and the water purification unit are controlled so that the water in the water storage tank is discharged through the domestic water pipeline, specifically including: When the current water use mode is the living water on and drinking water on mode, controlling the water purification unit to be on, and controlling the first solenoid valve to be on and the fifth solenoid valve to be closed; When detecting whether the liquid level height is the full water level height, if so, control the first solenoid valve and the fifth solenoid valve to be closed so that the water in the water storage tank flows to the drinking water outlet through the domestic water pipe, until it is detected that the liquid level height is a preset low liquid level height, control the first solenoid valve to be opened and the fifth solenoid valve to be opened, so that the water in the water storage tank flows to the domestic water outlet through the domestic water pipe, until it is detected that the liquid level height is the full water level height again, control the first solenoid valve to be opened and the fifth solenoid valve to be closed.

10. A method for treating wastewater of a reverse osmosis water purification system according to claim 6, characterized in that: Based on the current water use mode and the liquid level height, the switch states of the first solenoid valve, the fifth solenoid valve and the water purification unit are controlled so that the water in the water storage tank is discharged through the domestic water pipeline, specifically including: When the current water use mode is the domestic water on and drinking water off mode, the water purification unit is controlled to be closed, and the first solenoid valve is controlled to be opened and the fifth solenoid valve is controlled to be opened, so that the water in the water storage tank flows to the domestic water outlet through the domestic water pipe.

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