Pure water circulation supply system

Abstract

The utility model relates to a water treatment technology, and discloses a pure water circulation supply system which comprises an RO water tank, a pure water tank, an EDI module, a water supply pipeline and a return pipeline, an outlet of the RO water tank is connected with an inlet pipeline of the EDI module, and a first electric valve is arranged in the pipeline; a first outlet of the pure water tank is connected with an inlet pipeline of the EDI module, and a second electric valve is arranged in the pipeline; an outlet of the EDI module is connected with an inlet pipeline of the pure water tank; a second outlet of the pure water tank is connected with a water supply pipeline inlet; a water supply pipeline outlet is connected with an inlet of an external water side; an inlet of the return pipeline is connected with an outlet of an external water side, an outlet of the return pipeline is connected with an inlet of the RO water tank, and the return pipeline is divided into a diversion pipeline and connected with an inlet of the pure water tank through the diversion pipeline; and a first water quality detector and a second water quality detector are respectively arranged in the water supply pipeline and the return pipeline. The utility model aims to provide a pure water circulation supply system capable of improving the utilization rate of water resources.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a pure water circulation supply system. Background Art

[0002] At present, facing the water-using side with higher requirements for pure water quality (such as the test and analysis water used by hospital biochemical testing departments), pure water system equipment that only uses reverse osmosis technology to produce water is difficult to meet high water quality requirements. Therefore, it is often necessary to add EDI (Electrodeionization) devices in the water supply pipeline to further remove ions in the water so that the water quality reaches above 10MΩ•cm.

[0003] However, due to the existence of water tanks and circulating pipelines, the water quality of the EDI device often meets the standards, but after passing through the circulating pipeline for a long time, the return water on the water use side does not meet the standards. At this time, the water in the pure water tank is often discharged to produce new water, which will cause a waste of water resources and is not environmentally friendly. Utility Model Content

[0004] The utility model provides a pure water circulation supply system, aiming to improve the utilization rate of water resources inside and outside the system.

[0005] To achieve the above-mentioned purpose, the utility model proposes a pure water circulation supply system, comprising: an RO (Reverse Osmosis) water tank, a pure water tank, an EDI module, a water supply pipeline and a return pipeline; wherein the RO water tank outlet is connected to the EDI module inlet pipeline, and a first electric valve is provided in the pipeline; the first outlet of the pure water tank is connected to the EDI module inlet pipeline, and a second electric valve is provided in the pipeline; the EDI module outlet is connected to the pure water tank inlet pipeline; the second outlet of the pure water tank is connected to the water supply pipeline inlet, and the water supply pipeline outlet is used to connect to the inlet of the external water use side; the return pipeline inlet is used to connect to the outlet of the external water use side, the return pipeline outlet is connected to the RO water tank inlet, a shunt pipeline is also shunted in the reflux pipeline, and the pure water tank inlet is connected through the shunt pipeline, and a third electric valve is provided in the pipeline between the connection point of the reflux pipeline and the shunt pipeline to the RO water tank inlet, and a first valve is provided in the shunt pipeline; the water supply pipeline and the return pipeline are respectively provided with a first water quality detector and a second water quality detector.

[0006] Optionally, the second water quality detector is arranged in a pipeline between the connection point between the return pipeline and the branch pipeline and the inlet of the return pipeline.

[0007] Optionally, a second valve is further provided in the pipeline between the third electric valve and the outlet of the reflux pipeline; a first drainage pipeline is branched in the pipeline between the second valve and the third electric valve; and a third valve is provided in the first drainage pipeline.

[0008] Optionally, the EDI module includes a boost pump unit, a first filter and an EDI device, wherein the inlet of the boost pump unit is the inlet of the EDI module, the outlet of the boost pump unit is connected to the inlet pipe of the first filter, the outlet of the first filter is connected to the inlet pipe of the EDI device, and the pure water outlet of the EDI device is the outlet of the EDI module.

[0009] Optionally, the EDI module further includes a third water quality detector, and the third water quality detector is disposed in a pipeline between the pure water outlet and the pure water tank inlet of the EDI device.

[0010] Optionally, the EDI module further includes a second drainage pipeline, the concentrated water outlet of the EDI device is connected to the second drainage pipeline, and a fourth valve is provided in the second drainage pipeline.

[0011] Optionally, a water supply pump unit, a sterilizer and a second filter are provided in sequence between the inlet and the outlet of the water supply pipeline, and the first water quality detector is arranged in the pipeline between the second filter and the outlet of the water supply pipeline.

[0012] Optionally, a third drainage pipeline is branched in the pipeline between the outlet of the water supply pipeline and the second filter, and a fifth valve is provided in the third drainage pipeline.

[0013] Optionally, the pure water circulation supply system is further provided with a fourth drainage pipeline and / or a fifth drainage pipeline;

[0014] The fourth drainage pipeline is connected to the outlet of the RO water tank, and a sixth valve is provided in the fourth drainage pipeline;

[0015] The fifth drainage pipeline is connected to the first outlet of the pure water tank, and a seventh valve is provided in the fifth drainage pipeline.

[0016] Optionally, the inlet of the RO water tank is connected to the outlet pipeline of the reverse osmosis system, and a fourth electric valve is provided in the pipeline;

[0017] And / or, the outlet of the RO water tank is also connected to a cleaning device.

[0018] The beneficial effect of the technical solution of the utility model is that the pure water circulation supply system can re-purify the water in the pure water tank and purify the return water, thereby improving the utilization rate of water resources inside and outside the system. Under the premise of not affecting external water use, the substandard water inside and outside the system can be re-purified as much as possible to improve the water quality, so as to minimize water discharge and avoid unnecessary waste of water resources. The system has a high degree of automation, convenient operation, and environmental protection and saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a structural schematic diagram of an embodiment of the pure water circulation supply system of the utility model;

[0020] Figure 2 Another structural schematic diagram of an embodiment of the pure water circulation supply system of the utility model;

[0021] Figure 3 This is a structural schematic diagram of another embodiment of the pure water circulation supply system of the utility model;

[0022] Figure 4 This is a structural schematic diagram of another embodiment of the pure water circulation supply system of the utility model;

[0023] Figure 5 It is a structural schematic diagram of another embodiment of the pure water circulation supply system of the utility model.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the scheme in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0028] In addition, if the description of "first", "second", etc. is involved in the utility model, it is only used for descriptive purposes (such as for distinguishing the same or similar elements), and cannot be understood as indicating or implying its relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0029] The utility model proposes a pure water circulation supply system, referring to Figure 1 The pure water circulation supply system comprises an RO water tank, a pure water tank, an EDI module, a water supply pipeline and a return pipeline; wherein the RO water tank outlet is connected to the EDI module inlet pipeline, and a first electric valve F1 is provided in the pipeline; the first outlet of the pure water tank is connected to the EDI module inlet pipeline, and a second electric valve F2 is provided in the pipeline; the EDI module outlet is connected to the pure water tank inlet pipeline; the second outlet of the pure water tank is connected to the water supply pipeline inlet, and the water supply pipeline outlet is used to connect to the inlet of the external water use side; the return pipeline inlet is used to connect to the outlet of the external water use side, the return pipeline outlet is connected to the RO water tank inlet, a shunt pipeline is also shunted in the shunt pipeline, and the pure water tank inlet is connected through the shunt pipeline, and a third electric valve F3 is provided in the pipeline between the connection point of the shunt pipeline and the RO water tank inlet, and a first valve K1 is provided in the shunt pipeline; a first water quality detector J1 and a second water quality detector J2 are provided in the water supply pipeline and the return pipeline respectively.

[0030] In this embodiment, the RO water tank is used to store pure water produced by the reverse osmosis system. The outlet of the RO water tank is connected to the inlet pipe of the EDI module, and a first electric valve F1 is provided in the pipe. By controlling the opening or closing of the first electric valve F1, the flow of pure water in the RO water tank to the EDI module can be controlled. That is, when the first electric valve F1 is opened, the pure water in the RO water tank can flow to the EDI module through the corresponding pipe; when the first electric valve F1 is closed, the RO water tank stops supplying water to the EDI module.

[0031] Optionally, the EDI module is mainly used to further remove ions from pure water to make the water purer and ensure the stability of the water quality. The pure water further purified by the EDI module can flow through the corresponding pipeline to the pure water tank for storage.

[0032] The first outlet of the pure water tank is connected to the inlet pipe of the EDI module, and a second electric valve F2 is provided in the pipe. By controlling the opening or closing of the second electric valve F2, the flow of pure water in the pure water tank to the EDI module can be controlled. That is, when the second electric valve F2 is opened, the pure water in the pure water tank can flow back to the EDI module through the corresponding pipe, and be purified again by the EDI module to further remove residual ions or impurities and improve the purity of the water quality; when the second electric valve F2 is closed, the pure water tank stops supplying water to the EDI module.

[0033] Optionally, the second outlet of the pure water tank is connected to the external water use side outside the system through a water supply pipe, and pure water is supplied to the external water use side through the water supply pipe; and the external water use side is connected back to the inside of the system through a return pipe, and the waste water or excess water generated by use (collectively referred to as return water) is returned to the inside of the system through the return pipe, thereby forming a water circulation.

[0034] Among them, the external water use side refers to the water use environment or water use facilities outside the system, which can refer to various water use scenarios in life, industry, commerce or other fields, such as homes, factories, offices, schools, hospitals, public places, etc. Taking the use scenario of a hospital as an example, the external water use side can be water use points such as the hospital's testing center, laboratory, pathology department, and experimental area.

[0035] Optionally, the inlet of the reflux pipeline is used to connect to the outlet of the external water side, the outlet of the reflux pipeline is connected to the inlet of the RO water tank, and a third electric valve F3 is provided in the pipeline between the connection between the reflux pipeline and the shunt pipeline and the inlet of the RO water tank. In addition, a shunt pipeline is also shunted in the reflux pipeline, and connected to the inlet of the pure water tank through the shunt pipeline, and a first valve K1 is provided in the shunt pipeline, wherein the first valve K1 can be an electric valve or a manual control valve.

[0036] Optionally, by opening or closing the third electric valve F3 and the first valve K1, the flow of the water returned from the external water use side to the RO water tank and / or the pure water tank can be controlled. When the third electric valve F3 is opened and the first valve K1 is closed, the water returned from the external water use side flows to the RO water tank; when the third electric valve F3 and the first valve K1 are both opened, the water returned from the external water use side flows to both the RO water tank and the pure water tank; when the third electric valve F3 is closed and the first valve K1 is opened, the water returned from the external water use side flows to the pure water tank; when the third electric valve F3 and the first valve K1 are both closed, the water returned from the external water use side no longer flows to the RO water tank and the pure water tank.

[0037] Generally, when the pure water circulation supply system supplies water to the external water-using side normally, the first electric valve F1 remains open, and the second electric valve F2 is closed. At this time, the pure water in the RO water tank can flow to the EDI module through the corresponding pipeline and be purified by the EDI module; and the pure water purified by the EDI module can flow to the pure water tank through the corresponding pipeline for storage; and the pure water in the pure water tank will flow into the water supply pipeline through the second outlet, and supply pure water to the external water-using side through the water supply pipeline; and the external water-using side will return the waste water or excess water (collectively referred to as return water) generated by use to the inside of the system through the return pipeline, thereby forming a water circulation.

[0038] Optionally, a first water quality detector J1 is provided in the water supply pipeline for detecting the quality of pure water supplied to the external water use side; a second water quality detector J2 is provided in the return pipeline for detecting the quality of water returning from the external water use side.

[0039] Optionally, the water quality detector can be a resistivity meter, which is used to measure the resistivity or conductivity of water, which can indirectly determine the quality and purity of water by measuring the concentration of ions in water. When the resistivity or conductivity of water is within a certain threshold, it can be judged that the water quality is good and close to the target pure water requirement; if the resistivity or conductivity exceeds a certain threshold, it means that there are impurities, dissolved solids or other impure substances in the water, resulting in poor water quality (i.e., unqualified water quality).

[0040] Optionally, if the first water quality detector J1 detects that the water quality exceeds the standard (i.e., the water quality is unqualified), the second water quality detector J2 will generally also detect that the water quality exceeds the standard (because this is generally because there is a problem with the water quality in the pure water tank, resulting in the return water quality being unqualified). At this time, if the external water use side is at a peak water use period, the third electric valve F3 can be opened to return the water in the return pipe to the RO water tank, and the first valve K1 can be kept closed to prevent the return water from returning to the pure water tank through the diversion pipe, so as to prevent the return water from further affecting the water quality in the pure water tank (the return water returning to the RO water tank needs to be purified by the EDI module before entering the pure water tank). At this time, the system is only responsible for recycling the return water, and will not further purify the water in the pure water tank for the time being, so that the water in the pure water tank can continue to be supplied to the external water use side.

[0041] Optionally, the second water quality detector J2 is arranged in the pipeline between the connection point of the return pipeline and the bypass pipeline and the return pipeline inlet. In this way, the return water quality can be detected before the return water enters the bypass pipeline, and the opening or closing of the first valve K1 can be controlled according to the return water quality, so as to control whether the return water can flow directly back into the pure water tank.

[0042] Optional, see Figure 2A second valve K2 is also provided in the pipeline between the third electric valve F3 and the outlet of the return pipeline; a first drainage pipeline P1 is branched in the pipeline between the second valve K2 and the third electric valve F3; a third valve (not shown in the figure) is provided in the first drainage pipeline P1. The second and third valves can be electric valves or manual control valves.

[0043] Optionally, when the first water quality detector J1 and the second water quality detector J2 both detect that the water quality is unqualified and the external water use side is at its peak, the third electric valve F3 and the third valve can be opened, and the first valve K1 and the second valve K2 can be closed. At this time, the return water with poor water quality can be discharged from the system through the first drainage pipe P1, thereby preventing the return water from further affecting the water quality inside the system.

[0044] Optionally, when both the first water quality detector J1 and the second water quality detector J2 detect that the water quality is unqualified, if the external water use side is in a low water use peak period, the second electric valve F2 is opened to allow the water in the pure water tank to flow back to the EDI module for deep treatment, and the water in the pure water tank is circulated and purified through the circulation pipeline formed by the pure water tank, the second electric valve F2 and the EDI module, and the water in the pure water tank is circulated and purified through the EDI module until the first water quality detector J1 detects that the water quality meets the standard (that is, the water quality is qualified), and then the second electric valve F2 is closed to stop the circulation purification process. In this way, when the water output from the pure water tank is unqualified, it does not need to be discharged, but the water can be re-purified, thereby improving the utilization rate of water resources and reducing the waste of water resources, and the whole process is highly automated and easy to operate.

[0045] Optionally, in the process of circulating and purifying the water in the pure water tank, the first electric valve F1, the third electric valve F3 and the first valve K1 can be opened accordingly according to actual water demand, so that other water outside the circulation pipeline can be introduced into the circulation pipeline and circulated and purified at the same time, so as to complete the circulating purification of the water inside the entire system, thereby more thoroughly removing impurities and ions, thereby improving the quality of pure water to a greater extent and further improving the utilization rate of water resources.

[0046] Optionally, if the water quality detected by the first water quality detector J1 is qualified (indicating that the water quality in the pure water tank is fine), but the water quality detected by the second water quality detector J2 is unqualified (indicating that the return water does not meet the standards, such as the external water use side seriously pollutes the water), if the external water use side is at a peak water use period, the third electric valve F3 can be opened to return the water in the return pipe to the RO water tank, and the first valve K1 can be kept closed to prevent the return water from flowing back to the pure water tank through the diversion pipe, so as to prevent the return water from affecting the water quality in the pure water tank (the return water flowing back to the RO water tank needs to be purified by the EDI module before entering the pure water tank).

[0047] Alternatively, if the system is also provided with a first drainage pipe P1, when the first water quality detector J1 detects that the water quality is qualified, and the second water quality detector J2 detects that the water quality is unqualified, and the external water use side is at a peak water use period, the third electric valve F3 and the third valve can be opened, and the first valve K1 and the second valve K2 can be closed. At this time, the return water with poor water quality can be discharged from the system through the first drainage pipe P1, thereby preventing the return water from affecting the quality of pure water inside the system.

[0048] Optionally, if the water quality is qualified based on the monitoring of the first water quality detector J1 (indicating that the water quality in the pure water tank is fine, and further indicating that the quality of the water produced inside the system is fine), but the water quality is unqualified based on the monitoring of the second water quality detector J2 (indicating that the return water does not meet the standards, such as the serious water pollution on the external water use side), if the external water use side is in the low peak period of water use, the third electric valve F3 is closed and the first valve K1 is opened, so that the return water flows directly back to the pure water tank through the diversion pipeline. At this time, the first electric valve F1 is controlled to be closed and the second electric valve F2 is controlled to be opened, so that the circulation pipeline formed between the pure water tank, the second electric valve F2 and the EDI module is formed, and the water in the pure water tank is circulated and purified through the EDI module. In this way, it is ensured that the return water can be circulated and purified during the low peak period of water use, the water quality is improved, and the effective use of water resources is ensured. Until the second water quality detector J2 detects that the return water quality is qualified, the second electric valve F2 is closed and the first electric valve F1 is opened to allow the pure water in the RO water tank to continue to supply the EDI module and the pure water tank (at this time the third electric valve F3 can be reopened to allow the return water to enter the RO water tank).

[0049] In one embodiment, the pure water circulation supply system can re-purify the water in the pure water tank and purify the return water, thereby improving the utilization rate of water resources inside and outside the system. Without affecting external water use, the substandard water inside and outside the system can be re-purified as much as possible to improve the water quality, so as to minimize water discharge and avoid unnecessary waste of water resources. The system has a high degree of automation, convenient operation, and environmental protection and saving.

[0050] In one embodiment, based on the above embodiment, referring to Figure 3 The EDI module includes a boost pump unit, a first filter G1 and an EDI device, wherein the inlet of the boost pump unit is the inlet of the EDI module, the outlet of the boost pump unit is connected to the inlet pipe of the first filter G1, the outlet of the first filter G1 is connected to the inlet pipe of the EDI device, and the pure water outlet of the EDI device is the outlet of the EDI module.

[0051] In this embodiment, the booster pump unit is located at the entrance of the EDI module, and its function is to boost the water entering the EDI module. The booster pump unit may be provided with one or more booster pumps (not shown in the figure).

[0052] Optionally, the outlet of the boost pump unit is connected to the inlet pipe of the first filter G1. The function of the first filter G1 is to remove suspended particles and larger impurities in the water to ensure that the water is clean before further entering the EDI device for purification. The first filter G1 can effectively remove impurities such as solid particles in the water by physical filtration. Among them, the first filter G1 can be a microporous filter.

[0053] Optionally, the outlet of the first filter G1 is connected to the inlet pipe of the EDI device. The EDI device is the core part of the electrical ion exchange. Through the selective permeability and retardation of the ion exchange membrane, ions and other impurities in the water are removed by ion exchange and electrical adsorption, thereby obtaining high-purity pure water. The EDI device can use multiple steps such as chemical reaction, electrical action, ion exchange and physical adsorption to treat water, and produce two fluids, pure water and concentrated water, during the treatment process.

[0054] Optionally, the outlet of the EDI module is the pure water outlet of the EDI device, where high-purity pure water will flow out. The pure water outlet is connected to the inlet pipe of the pure water tank, and the pure water is injected into the pure water tank, and is supplied to the outside by the subsequent water supply pipeline.

[0055] In this way, through the combination of the booster pump unit, the first filter G1 and the EDI device, the EDI module can effectively purify water and produce high-purity pure water, further improving the pure water quality of the system.

[0056] Optionally, the EDI module further includes a second drainage pipeline P2, the concentrated water outlet of the EDI device is connected to the second drainage pipeline P2, and a fourth valve (not shown in the figure) is provided in the second drainage pipeline P2.

[0057] Optionally, in addition to producing high-purity pure water, the EDI device also produces a portion of concentrated water. Concentrated water is a byproduct of the EDI device treatment process, which contains removed ions and other impurities. This portion of concentrated water is discharged through the second drainage pipeline P2 connected to the concentrated water outlet of the EDI device.

[0058] Optionally, the fourth valve is located in the second drainage pipeline P2 to control the flow direction and discharge of concentrated water. The opening and closing operation and adjustment of the fourth valve can control the discharge amount and frequency of concentrated water. The fourth valve can be an electric valve or a manual control valve.

[0059] In this way, by introducing the second drainage pipeline P2 and the fourth valve, the concentrated water generated by the EDI device can be effectively treated. By controlling the opening and closing of the fourth valve, the concentrated water can be reasonably treated and discharged, thereby improving the operating efficiency of the system and reducing the impact on the environment.

[0060] In one embodiment, based on the above embodiment, referring to Figure 3 The EDI module also includes a third water quality detector J3, and the third water quality detector J3 is arranged in a pipeline between the pure water outlet and the pure water tank inlet of the EDI device.

[0061] In this embodiment, the third water quality detector J3 is the same as the first and second water quality detectors J2, and is also used to detect the quality of water. The third water quality detector J3 is arranged in the pipeline between the pure water outlet of the EDI device and the pure water tank inlet, so that the purification effect of the EDI device on pure water can be detected by the third water quality detector J3.

[0062] Optionally, the first electric valve F1 and the second electric valve F2 are connected via a corresponding pipeline, and the inlet of the EDI module is connected to the pipeline connected between the first electric valve F1 and the second electric valve F2.

[0063] Optionally, if the first, second, and third water quality detectors J3 simultaneously detect that the water quality is unqualified, it means that not only the water quality in the entire system circulation loop is unqualified, but also the purification effect of the EDI module is not good (such as the water quality is seriously polluted and difficult to purify quickly) or the purification fails (such as the relevant equipment components in the EDI module are aging or damaged). At this time, the first electric valve F1 and the second electric valve F2 are opened at the same time, so that the RO water tank and the pure water tank are directly connected through the pipeline, and the pure water flowing out of the RO water tank passes through the first electric valve F1 and the second electric valve F2 in turn and flows into the pure water tank, so that the pure water tank can directly supply water to the external water use side through the water supply pipeline based on the pure water provided by the RO water tank to meet the external water demand.

[0064] In this way, an emergency water supply channel can be provided when the EDI module fails or the water quality inside the system cannot meet the requirements, so as to ensure that the external water demand can be met.

[0065] After the third water quality detector J3 re-detects that the water quality is qualified, it means that the EDI module purification process has been restored. At this time, the emergency water supply plan is disabled, and the control system switches to the corresponding operation mode according to the detection results of the first and second water quality detectors J2.

[0066] In one embodiment, based on the above embodiment, referring to Figure 4A water supply pump unit, a sterilizer and a second filter G2 are sequentially arranged between the inlet and the outlet of the water supply pipeline, and the first water quality detector J1 is arranged in the pipeline between the second filter G2 and the outlet of the water supply pipeline.

[0067] In this embodiment, the water supply pump unit is located at the entrance of the water supply pipeline. It is not only responsible for pushing pure water from the pure water tank into the sterilizer, but also enables the water entering the water supply pipeline to obtain sufficient kinetic energy and pass smoothly through the entire water supply pipeline until it reaches the external water use side.

[0068] Optionally, one or more water supply pumps (not shown in the figure) can be set in the water supply pump unit to ensure that the water supply system can meet the needs of the external water use side when a larger flow rate or higher pressure is required. By setting up multiple water supply pumps, the flow rate and pressure can be adjusted and balanced. When a water supply pump needs maintenance or fails, other pumps can continue to work to ensure the continuity and reliability of water supply.

[0069] Among them, the water supply pump can choose a suitable type, such as a centrifugal pump or a volumetric pump, according to the needs and design parameters.

[0070] Optionally, the sterilizer is the next processing unit after the water supply pump unit, which is used to sterilize the water entering the water supply pipeline to ensure the hygiene and safety during the water supply process. The sterilizer can be a flow-through ultraviolet sterilizer.

[0071] It should be noted that the flow-through UV sterilizer can use ultraviolet radiation to kill bacteria, viruses and other microorganisms when water flows through it. Its working principle is to pass water through the UV lamp inside the device, and the ultraviolet rays can destroy the DNA structure of microorganisms, thereby achieving the sterilization effect.

[0072] Optional, flow-through UV sterilizers can provide reliable and efficient sterilization in the water supply line. By ensuring that microorganisms in the water supply are effectively removed, the spread of viruses and bacteria can be prevented, providing a hygienic and safe water supply.

[0073] Optionally, the second filter G2 is the next processing unit after the sterilizer, used to further filter and purify the pure water, remove suspended solid particles and other impurities. Referring to the first filter G1, the second filter G2 can also be a microporous filter.

[0074] Optionally, a first water quality detector J1 is disposed in the pipe between the second filter G2 and the water supply pipeline outlet to detect the water supply quality of the system to the external water use side (i.e., the quality of pure water processed by the system), which will help ensure that the quality of the water supply is controllable and meets the expected standards.

[0075] In one embodiment, based on the above embodiment, referring to Figure 4 A third drainage pipeline P3 is also branched in the pipeline between the outlet of the water supply pipeline and the second filter G2, and a fifth valve (not shown in the figure) is provided in the third drainage pipeline P3.

[0076] In this embodiment, the fifth valve may be an electric valve or a manual control valve.

[0077] When the system needs to be drained (such as the pure water inside the system has exceeded its service life, or can no longer be recycled, or the system needs to be cleaned or parts replaced), the fifth valve can be opened to activate the third drainage pipeline P3 to drain the water inside the system (if the third drainage pipeline P3 does not need to be activated, the fifth valve can be closed).

[0078] If the system is further provided with a first drainage pipeline P1 and / or a second drainage pipeline P2, when the third drainage pipeline P3 is activated, the first drainage pipeline P1 and / or the second drainage pipeline P2 are activated at the same time to increase the drainage efficiency.

[0079] This ensures that when drainage is required, the drainage operation can be completed efficiently through the rational use of drainage pipes and valves.

[0080] In one embodiment, based on the above embodiment, referring to Figure 5 , the pure water circulation supply system is also provided with a fourth drainage pipeline P4 and / or a fifth drainage pipeline P5;

[0081] The fourth drainage pipeline P4 is connected to the outlet of the RO water tank, and a sixth valve (not shown in the figure) is provided in the fourth drainage pipeline P4;

[0082] The fifth drainage pipeline P5 is connected to the first outlet of the pure water tank, and a seventh valve (not shown in the figure) is provided in the fifth drainage pipeline P5.

[0083] In this embodiment, the fourth drainage pipeline P4 is connected to the outlet of the RO water tank, and is mainly used to discharge the pure water in the RO water tank. The fourth drainage pipeline P4 is provided with a sixth valve, which is used to control the switch of the fourth drainage pipeline P4. When the fourth drainage pipeline P4 needs to be activated, the sixth valve is opened; when the sixth valve is closed, the fourth drainage pipeline P4 is closed.

[0084] Optionally, the fifth drainage pipeline P5 is connected to the first outlet of the pure water tank, and is mainly used to drain the water in the pure water tank. A seventh valve is provided in the fifth drainage pipeline P5, which is used to control the switch of the fifth drainage pipeline P5. When the fifth drainage pipeline P5 needs to be activated, the seventh valve is opened; when the seventh valve is closed, the fifth drainage pipeline P5 is closed.

[0085] Optionally, the sixth and seventh valves may be electric valves or manual control valves.

[0086] In one embodiment, based on the above embodiment, referring to Figure 5 , the inlet of the RO water tank is connected to the outlet pipeline of the reverse osmosis system, and a fourth electric valve F4 is provided in the pipeline;

[0087] And / or, the outlet of the RO water tank is also connected to a cleaning device.

[0088] In this embodiment, the inlet of the RO water tank is connected to the outlet pipe of the reverse osmosis system, and a fourth electric valve F4 is provided in the pipe, which is an important channel for delivering the pure water produced by the reverse osmosis system to the RO water tank. By controlling the switch of the fourth electric valve F4, it is possible to control whether the pure water output by the reverse osmosis system enters the RO water tank.

[0089] Optionally, the outlet of the RO water tank can also be connected to a cleaning device. This connection is used to supply the pure water of the RO water tank to the cleaning device. Through the connection with the cleaning device, the required pure water can be provided to the cleaning device.

[0090] Optionally, the cleaning equipment may be cleaning equipment used on the external water use side, or may be cleaning equipment on other cleaning demand sides (such as a reverse osmosis system).

[0091] Among them, when the RO water tank is connected to the cleaning equipment of the reverse osmosis system, a self-cleaning circulation system can be formed between the reverse osmosis system, the RO water tank and the cleaning equipment.

[0092] In one embodiment, based on the above embodiment, the pure water circulation supply system also includes a controller (not shown in the figure), and the control output end of the controller is electrically connected to the control end of each electronic control component in the system, and controls and monitors the working status of each electronic control component.

[0093] Optionally, the electronically controlled components in the system may be electric valves, booster pumps, water supply pumps, filters, sterilizers and EDI devices.

[0094] Optionally, the controller may be a PLC (Programmable Logic Controller) controller.

[0095] The above description is only a partial or preferred embodiment of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A pure water circulation supply system, characterized in that: include: RO water tank, pure water tank, EDI module, water supply pipeline and return pipeline; wherein, the RO water tank outlet is connected to the EDI module inlet pipeline, and a first electric valve is provided in the pipeline; the first outlet of the pure water tank is connected to the EDI module inlet pipeline, and a second electric valve is provided in the pipeline; the EDI module outlet is connected to the pure water tank inlet pipeline; the second outlet of the pure water tank is connected to the water supply pipeline inlet, and the water supply pipeline outlet is used to connect to the inlet of the external water use side; the return pipeline inlet is used to connect to the outlet of the external water use side, and the return pipeline outlet is connected to the RO water tank inlet, and a shunt pipeline is also shunted in the reflux pipeline, and the pure water tank inlet is connected through the shunt pipeline, and a third electric valve is provided in the pipeline between the connection point of the reflux pipeline and the shunt pipeline to the RO water tank inlet, and a first valve is provided in the shunt pipeline; the water supply pipeline and the return pipeline are respectively provided with a first water quality detector and a second water quality detector.

2. The pure water circulation supply system according to claim 1, characterized in that: The second water quality detector is arranged in a pipeline between the connection point of the return pipeline and the branch pipeline and the inlet of the return pipeline.

3. The pure water circulation supply system according to claim 1 or 2, characterized in that: A second valve is also provided in the pipeline between the third electric valve and the outlet of the reflux pipeline; a first drainage pipeline is branched in the pipeline between the second valve and the third electric valve; and a third valve is provided in the first drainage pipeline.

4. The pure water circulation supply system according to claim 1, characterized in that: The EDI module includes a booster pump unit, a first filter and an EDI device, wherein the inlet of the booster pump unit is the inlet of the EDI module, the outlet of the booster pump unit is connected to the inlet pipe of the first filter, the outlet of the first filter is connected to the inlet pipe of the EDI device, and the pure water outlet of the EDI device is the outlet of the EDI module.

5. The pure water circulation supply system according to claim 4, characterized in that: The EDI module also includes a third water quality detector, and the third water quality detector is arranged in a pipeline between the pure water outlet and the pure water tank inlet of the EDI device.

6. The pure water circulation supply system according to claim 4 or 5, characterized in that: The EDI module also includes a second drainage pipeline. The concentrated water outlet of the EDI device is connected to the second drainage pipeline, and a fourth valve is provided in the second drainage pipeline.

7. The pure water circulation supply system according to claim 1, characterized in that: A water supply pump unit, a sterilizer and a second filter are sequentially arranged between the inlet and the outlet of the water supply pipeline, and the first water quality detector is arranged in the pipeline between the second filter and the outlet of the water supply pipeline.

8. The pure water circulation supply system according to claim 7, characterized in that: A third drainage pipeline is also branched in the pipeline between the outlet of the water supply pipeline and the second filter, and a fifth valve is provided in the third drainage pipeline.

9. The pure water circulation supply system according to claim 1, characterized in that: The pure water circulation supply system is also provided with a fourth drainage pipeline and / or a fifth drainage pipeline; The fourth drainage pipeline is connected to the outlet of the RO water tank, and a sixth valve is provided in the fourth drainage pipeline; The fifth drainage pipeline is connected to the first outlet of the pure water tank, and a seventh valve is provided in the fifth drainage pipeline.

10. The pure water circulation supply system according to claim 1 or 9, characterized in that: The inlet of the RO water tank is connected to the outlet pipeline of the reverse osmosis system, and a fourth electric valve is provided in the pipeline; And / or, the outlet of the RO water tank is also connected to a cleaning device.

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