A reverse osmosis water purification system

Abstract

A reverse osmosis (RO) water purification system belongs to the field of water purifier technology. It includes a composite filter element, a diaphragm pump, an RO filter element, a storage tank, and a pressure switch. The first inlet of the composite filter element is connected to a tap water pipe, and the first outlet is divided into two branches: one branch connects to a faucet, and the other branch connects to the inlet of the RO filter element via the diaphragm pump. The first outlet of the RO filter element is unidirectionally connected to the inlet of the storage tank. The outlet of the storage tank is divided into two branches: one branch connects to the second inlet of the composite filter element via the pressure switch, and the second outlet of the composite filter element connects to a faucet. The second branch at the outlet of the storage tank is unidirectionally connected to the inlet of the RO filter element via the diaphragm pump. This utility model water purification system enables multi-stage utilization of the water storage equipment, improving the purified water output, the quality of the first cup of water from the water purifier, and the efficiency of equipment backflow flushing.

Description

Technical Field

[0001] This utility model belongs to the field of water purifier technology, specifically relating to a reverse osmosis water purifier system. Background Technology

[0002] In a water purifier's water production system, the water storage device primarily serves to store purified water. Currently, in water purification systems equipped with a water storage device, the storage device is generally used solely to store water to increase the equipment's purified water output, or it can be used as a separate storage tank for purified water return.

[0003] This utility model water purification system enables multi-stage utilization of the water storage equipment. When the water purification equipment is purifying water, the water in the storage equipment can synergistically increase the overall water output. When the water purification equipment needs purified water to be returned for rinsing the membrane, the water in the storage equipment can be used as the purified water required for rinsing. This not only increases the purified water output and significantly improves the quality of the first cup of water from the water purifier, but also improves the efficiency of the equipment's return rinsing. Utility Model Content

[0004] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a reverse osmosis water purification system.

[0005] This utility model provides the following technical solution: a reverse osmosis water purifier system, including a composite filter element, a diaphragm pump, an RO filter element, a water storage tank, and a pressure switch. The first inlet of the composite filter element is connected to a tap water pipeline, and the first outlet is divided into two branches. One branch is connected to a faucet, and the other branch is connected to the inlet of the RO filter element via the diaphragm pump. The first outlet of the RO filter element is unidirectionally connected to the inlet of the water storage tank. The outlet of the water storage tank is divided into two branches. One branch is connected to the second inlet of the composite filter element via the pressure switch, and the second outlet of the composite filter element is connected to a faucet. The second branch at the outlet of the water storage tank is unidirectionally connected to the inlet of the RO filter element via the diaphragm pump.

[0006] Furthermore, the wastewater in the RO filter element is connected to the sewage outlet through a second outlet via a wastewater discharge pipe, and a wastewater solenoid valve is installed on the wastewater discharge pipe.

[0007] Furthermore, an inlet solenoid valve and a raw water TDS probe are installed on the pipeline between the first outlet of the composite filter element and the diaphragm pump.

[0008] Furthermore, a purified water TDS probe is installed on the pipe between the outlet of the water storage tank and the second inlet of the composite filter element.

[0009] Furthermore, one-way valves are provided on the pipe between the first outlet of the RO filter element and the inlet of the water storage tank, and on the pipe between the outlet of the water storage tank and the diaphragm pump; and a second inlet solenoid valve is also provided on the pipe between the outlet of the water storage tank and the diaphragm pump.

[0010] By adopting the above-mentioned technology, the beneficial effects of this utility model compared with the prior art are as follows:

[0011] This invention utilizes a interconnected design between components such as the composite filter element, RO filter element, water storage tank, and pressure switch. Based on the control of the inlet solenoid valve, check valve, and wastewater solenoid valve, the water storage tank functions as a water storage device during water production. When the water storage tank is full and the faucet handle is turned on to start dispensing purified water, the water in the storage tank preferentially passes through the composite filter element before exiting through the faucet. In this state, the purified water flow rate is significantly greater than the actual flow rate of the RO membrane filter element, thus greatly increasing the initial purified water output. Furthermore, after water production stops, a portion of the purified water in the storage tank enters the RO membrane filter element's concentrate section, completely replacing the concentrate in the RO membrane housing with purified water, ensuring the quality of the first cup of water dispensed after a period of inactivity. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0014] Conversely, this utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model as defined in the claims. Furthermore, to provide the public with a better understanding of this utility model, certain specific details are described in detail in the following description. However, those skilled in the art will fully understand this utility model even without these detailed descriptions.

[0015] Please see Figure 1 A novel water purification system includes a composite filter element 1, a diaphragm pump 2, an RO filter element 3, a water storage tank 4, a pressure switch 5, a faucet 6, a wastewater solenoid valve 7, an inlet solenoid valve 1 8, a raw water TDS probe 9, a purified water TDS probe 10, a check valve 11, and an inlet solenoid valve 2 12.

[0016] Specifically, the first inlet of the composite filter element 1 is connected to the tap water pipeline, and the first outlet is divided into two branches. One branch is connected to the faucet 6 to deliver purified water; the other branch is connected to the inlet of the RO filter element 3 via the diaphragm pump 2. The first outlet of the RO filter element 3 is connected to the inlet of the water storage tank 4 through a one-way valve 11. The outlet of the water storage tank 4 is divided into two branches. One branch is connected to the second inlet of the composite filter element 1 via the pressure switch 5. The second outlet of the composite filter element 1 is connected to the faucet 6 to deliver purified water. The second branch at the outlet of the water storage tank 4 is connected to the inlet of the RO filter element 3 via the diaphragm pump 2 through a one-way valve 11.

[0017] Specifically, the second outlet of the RO filter element 3 is connected to the drain outlet through a pipe, and the wastewater solenoid valve 7 is installed on the aforementioned pipe. The wastewater in the RO filter element 3 flows into the drain outlet through the second outlet.

[0018] Specifically, a raw water TDS probe 9 for detecting raw water is installed on the pipeline between the first outlet of the composite filter element 1 and the diaphragm pump 2, and a purified water TDS probe 10 for detecting purified water is installed on the pipeline between the outlet of the water storage tank 4 and the second inlet of the composite filter element 1.

[0019] In use, tap water is filtered through composite filter element 1 and then flows to faucet 6 to dispense purified domestic water. When the faucet handle is turned on, the device dispenses purified water. When the faucet handle is closed, pressure switch 5 is closed, and the water purifier enters the water production state. Inlet solenoid valve 8 and diaphragm pump 2 are opened. Tap water filtered through composite filter element 1 is pressurized by diaphragm pump 2 and enters RO filter element 3. The purified water first reaches the storage tank 4. When pressure switch 5 is turned off, the tank is full, and the device stops producing water. Wastewater is discharged to the drain outlet through wastewater solenoid valve 7. When the tank is full, turning on the faucet handle starts dispensing purified water. At this time, the water in storage tank 4 first passes through composite filter element 1 and then flows out through faucet 6. The purified water flow rate in this state is much greater than the actual flow rate of RO filter element 3, which greatly increases the initial purified water output. Because the TDS value of the RO filter cartridge 3 tends to rise after a period of shutdown, after water production stops, the inlet solenoid valve 12 and diaphragm pump 2 are opened. Part of the purified water in the storage tank 4 enters the concentrate section of the RO filter cartridge 3 through diaphragm pump 2, while the concentrate in the RO membrane housing is discharged to the drain outlet through the wastewater solenoid valve 7. A portion of the newly produced purified water is then returned to the storage tank 4. In this way, the concentrate in the RO membrane housing is completely replaced by the purified water in the storage tank 4. At this point, the ion concentrations on both sides of the RO membrane become almost identical, ensuring that after a period of shutdown, the purified water flowing from the faucet will maintain a stable desalination rate of around 90%, and the TDS of the first purified water drawn from the faucet will be relatively low.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reverse osmosis water purification system, characterized in that, The system includes a composite filter element (1), a diaphragm pump (2), an RO filter element (3), a water storage tank (4), and a pressure switch (5). The first inlet of the composite filter element (1) is connected to the tap water pipeline, and the first outlet is divided into two branches. One branch is connected to the faucet (6), and the other branch is connected to the inlet of the RO filter element (3) via the diaphragm pump (2). The first outlet of the RO filter element (3) is unidirectionally connected to the inlet of the water storage tank (4). The outlet of the water storage tank (4) is divided into two branches. One branch is connected to the second inlet of the composite filter element (1) via the pressure switch (5), and the second outlet of the composite filter element (1) is connected to the faucet (6). The second branch at the outlet of the water storage tank (4) is unidirectionally connected to the inlet of the RO filter element (3) via the diaphragm pump (2).

2. The reverse osmosis water purification system according to claim 1, characterized in that, The wastewater in the RO filter element (3) is connected to the sewage outlet through the second outlet via the wastewater discharge pipe, and a wastewater solenoid valve (7) is installed on the wastewater discharge pipe.

3. The reverse osmosis water purification system according to claim 1, characterized in that, The pipeline between the first outlet of the composite filter element (1) and the diaphragm pump (2) is equipped with an inlet solenoid valve (8) and a raw water TDS probe (9).

4. A reverse osmosis water purification system according to claim 1, characterized in that, A water purification TDS probe (10) is installed on the pipe between the outlet of the water storage tank (4) and the second inlet of the composite filter element (1).

5. A reverse osmosis water purification system according to claim 1, characterized in that, One-way valves (11) are provided on the pipe between the first outlet of the RO filter element (3) and the inlet of the water storage tank (4), and on the pipe between the outlet of the water storage tank (4) and the diaphragm pump (2); Furthermore, an inlet solenoid valve 2 (12) is installed on the pipeline between the outlet of the water storage tank (4) and the diaphragm pump (2).

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