Filter element structure, and test system and test method for improving performance of first cup of water

Abstract

The invention provides a filter element structure, and a test system and test method for improving the performance of first cup water, the filter element structure comprises: a filter element barrel, one end of which is provided with a raw water inlet, a pure water outlet and a wastewater outlet; a first pure water channel is formed between the RO membrane filter element and the inner wall of the filter element barrel body, one end of the first pure water channel is communicated with the pure water outlet, and the wastewater end of the RO membrane filter element is communicated with the wastewater outlet; the central pipe assembly is provided with an inner-layer pipe and an outer-layer pipe which are connected, a first water inlet channel is arranged between the inner-layer pipe and the outer-layer pipe, one end of the first water inlet channel is communicated with the raw water inlet, the other end of the first water inlet channel is communicated with the water inlet end of the RO membrane filter element, the middle part of the inner-layer pipe is provided with a second pure water channel, and the outer-layer pipe is provided with a pure water flow channel; and the pure water flow channel is communicated with the second pure water channel. The central pipe assembly is arranged to be of a double-layer structure, the volume of pure water is increased through the arrangement of the second pure water channel and the pure water flow channel, and the TDS value of the first cup of water is improved.

Description

Technical Field

[0001] The present application relates to the field of water purification equipment, and in particular to a filter element structure, a test system and a test method for improving the performance of a first cup of water. Background Art

[0002] With the development of economy and the progress of society, people have higher and higher requirements for drinking water. For this reason, many families are equipped with various water purification equipment, such as water softener, ultrafiltration machine, reverse osmosis water purifier, etc. The emergence of various water purification equipment meets people's various water needs in life and improves people's living standards and water health at the same time.

[0003] The working principle of the reverse osmosis water purifiers currently on the market is mainly based on the fact that the dissolution-diffusion rate of water is much greater than that of ions, thereby separating water and ions. That is, the solubility and diffusion rate of water molecules in the solution are usually greater than that of ions. Under pressure, water molecules can pass through the semipermeable membrane faster, while ions are retained in the original solution due to the selectivity of the membrane. When the water purifier is shut down, the TDS values ​​of the raw water and concentrated water in the water inlet channel are much higher than the TDS value of the pure water in the first pure water channel. Driven by the concentration gradient, the ions in the water inlet channel diffuse through the membrane into the first pure water channel, causing the TDS value of the pure water to rise, resulting in a higher TDS value for the first cup of water. Summary of the invention

[0004] The embodiments of the present application provide a filter element structure, a test system and a test method for improving the performance of the first cup of water, so as to solve the problems existing in the related technologies. The technical solutions are as follows:

[0005] In a first aspect, an embodiment of the present application provides a filter element structure, comprising:

[0006] A filter cartridge barrel body, one end of which has a raw water inlet, a pure water outlet and a waste water outlet;

[0007] An RO membrane filter element is installed inside the filter element barrel body, a first pure water channel is formed between the RO membrane filter element and the inner wall of the filter element barrel body, one end of the first pure water channel is connected to the pure water outlet, and a wastewater end of the RO membrane filter element is connected to the wastewater outlet;

[0008] A central tube assembly is located in the middle of the RO membrane filter element. The central tube assembly has a connected inner tube and an outer tube. The inner tube is located in the middle of the outer tube. A first water inlet channel is provided between the inner tube and the outer tube. One end of the first water inlet channel is communicated with the raw water inlet, and the other end of the first water inlet channel is communicated with the water inlet end of the RO membrane filter element. A second pure water channel is provided in the middle of the inner tube. A pure water flow channel is provided on the outer tube. The pure water flow channel is communicated with the second pure water channel, and the other end of the first pure water channel is communicated with one end of the second pure water channel.

[0009] In one embodiment, the first water inlet channel extends axially along the central tube assembly, the pure water channel extends radially along the outer tube, there are multiple pure water channels, and the multiple pure water channels are spaced apart along the axial direction of the outer tube.

[0010] In one embodiment, the filter element structure further comprises:

[0011] A filter element housing, wherein the RO membrane filter element is installed inside the filter element housing, a pure water outlet channel is provided in the middle of the filter element housing, one end of the second pure water channel is communicated with the pure water outlet channel, and the pure water outlet channel is communicated with the first pure water channel.

[0012] In one embodiment, a raw water outlet channel is provided between the filter element housing and the end of the central tube assembly, the raw water outlet channel is communicated with the other end of the first water inlet channel, and the first water inlet channel is communicated with the water inlet end of the RO membrane filter element through the raw water outlet channel.

[0013] In one embodiment, the filter element structure also includes an inlet end cover and a wastewater end cover, wherein the inlet end cover is installed at the wastewater end of the RO membrane filter element, and the inner wall of the inlet end cover is sealed and connected to the outer peripheral surface of the central tube assembly, and the inlet end cover is provided with a second inlet channel, and the raw water inlet is connected to the first inlet channel through the second inlet channel; the wastewater end cover is installed at the wastewater end of the RO membrane filter element, and the inlet end cover is located inside the wastewater end cover, and a wastewater channel is provided between the inlet end cover and the wastewater end cover, and the wastewater end of the RO membrane filter element is connected to the wastewater outlet through the wastewater channel.

[0014] In a second aspect, the embodiment of the present application provides a testing system for improving the performance of the first glass of water, comprising at least:

[0015] A water inlet pipeline, one end of which is connected to an external water source, and a first solenoid valve and a booster pump are provided on the water inlet pipeline;

[0016] The filter element structure as described in any one of the above items, the other end of the water inlet pipeline is connected to the raw water inlet of the filter element structure, the booster pump is located between the first solenoid valve and the filter element structure, the waste water outlet of the filter element structure is connected to a waste water pipe, a waste water solenoid valve is provided on the waste water pipe, the pure water outlet of the filter element structure is connected to a pure water outlet pipe, and the pure water outlet pipe is connected to a water purification faucet;

[0017] A flushing pipeline, one end of which is connected to the pure water outlet pipe, and the other end of which is connected to the water inlet pipeline. The connection between the flushing pipeline and the water inlet pipeline is located between the first solenoid valve and the booster pump. A second solenoid valve is provided on the flushing pipeline.

[0018] In one embodiment, the testing system further comprises:

[0019] The PPC filter element assembly includes a pre-filter element and a post-filter element, wherein the water inlet end of the pre-filter element is connected to the external water source, and the water outlet end of the pre-filter element is connected to one end of the water inlet pipeline; the water inlet end of the post-filter element is connected to the pure water outlet pipe, and the water outlet end of the post-filter element is connected to the water purification faucet.

[0020] In one embodiment, a pressure gauge is provided on the water inlet pipeline, and the pressure gauge is located between the booster pump and the filter element structure. Check valves are provided on the water inlet pipeline and the flushing pipeline; NFC chips are provided on the filter element structure and the PPC filter element assembly; the test system also includes a control panel, and the first solenoid valve, the second solenoid valve, the booster pump and the wastewater solenoid valve are all electrically connected to the control panel.

[0021] In a third aspect, an embodiment of the present application provides a test method for improving the performance of the first glass of water, the test method is applied to the test system as described in any one of the above items, and the test method comprises the following steps:

[0022] Configure spiked water. In water production mode, open the first solenoid valve, booster pump and wastewater solenoid valve, close the second solenoid valve, and deliver spiked water to the filter element structure through the booster pump and the water inlet pipeline. Pure water filtered by the filter element structure is discharged through the pure water outlet pipe, and wastewater filtered by the filter element structure is discharged through the wastewater pipe.

[0023] After the water production mode is over, the first solenoid valve is closed, and the booster pump, the second solenoid valve and the wastewater solenoid valve are opened. The booster pump extracts pure water from the RO membrane filter element of the filter element structure through the flushing pipeline to flush the water inlet end and / or wastewater end of the RO membrane filter element;

[0024] After the flushing is completed, the first solenoid valve, the booster pump, the second solenoid valve and the waste water solenoid valve are closed to put the test system in a static state. After the static time is over, the clean water faucet is opened to take the first cup of water for testing.

[0025] In one embodiment, in water production mode and flushing, the voltage of the booster pump is adjusted so that the working pressure of the test system is 0.55-0.75 MPa.

[0026] The advantages or beneficial effects of the above technical solution include at least:

[0027] The filter element structure of the embodiment of the present application includes a filter element barrel, an RO membrane filter element and a central tube assembly, wherein the central tube assembly has an inner tube and an outer tube connected to each other, a first water inlet channel is provided between the inner tube and the outer tube, a second pure water channel is provided in the middle of the inner tube, a pure water flow channel is provided on the outer tube, the pure water flow channel is communicated with the second pure water channel, and the other end of the first pure water channel is communicated with one end of the second pure water channel. When the filter element structure of the embodiment of the present application is in use, the tap water entering through the raw water inlet passes through the first water inlet channel and then enters the inside of the RO membrane from the water inlet end of the RO membrane filter element for filtration, the filtered pure water enters the second pure water channel through the pure water flow channel, then the pure water enters the first pure water channel from the second pure water channel, and finally is output from the pure water outlet, and the filtered waste water is output through the waste water outlet.

[0028] In the embodiment of the present application, the central tube assembly is set as a double-layer structure, and the second pure water channel is set inside the first water inlet channel. The second pure water channel and the pure water flow channel are set to increase the volume of pure water, so that the volume of pure water stored in the filter element structure when it is stationary is greatly increased, and the volume of the water inlet end and the waste water end is greatly reduced while the total volume of the filter element structure remains unchanged, thereby reducing the total amount of dissolved solids inside the filter element structure. Since the concentration is the ratio of the solute amount (total amount of dissolved solids) to the solvent amount (pure water volume), the TDS value of pure water is reduced, achieving the effect of reducing the TDS value of pure water during the stationary process, and improving the TDS value of the first cup of water. The RO membrane filter element can be rinsed with a large amount of pure water stored in the filter element structure to slow down the occurrence of forward osmosis and further improve the TDS value of the first cup of water.

[0029] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0031] Figure 1 It is a cross-sectional view of the filter element structure;

[0032] Figure 2 is another cross-sectional view of the filter element structure;

[0033] Figure 3 is a structural diagram of the central tube assembly;

[0034] Figure 4 is a cross-sectional view of a center tube assembly;

[0035] Figure 5 Diagram of the test system for improving the performance of the first cup of water;

[0036] Description of reference numerals:

[0037] 1. Filter cartridge barrel; 101. Raw water inlet; 102. Pure water outlet; 103. Waste water outlet; 2. RO membrane filter cartridge; 3. First pure water channel; 4. Central tube assembly; 401. Inner tube; 402. Outer tube; 403. First water inlet channel; 404. Second pure water channel; 405. Pure water flow channel; 5. Filter cartridge housing; 501. Pure water outlet channel; 502. Water outlet column; 503. First sealing groove; 504. First sealing ring; 505. Raw water outlet channel; 6. Water inlet end cover; 601. Second water inlet channel; 602. Second sealing groove; 603. Second sealing ring Ring; 604, third sealing groove; 605, third sealing ring; 7, wastewater end cover; 701, wastewater channel; 702, installation groove; 703, fourth sealing groove; 704, fourth sealing ring; 104, filter cartridge barrel; 105, filter cartridge cover; 8, water inlet pipeline; 9, first solenoid valve; 10, booster pump; 11, wastewater pipe; 12, wastewater solenoid valve; 13, pure water outlet pipe; 14, clean water faucet; 15, flushing pipeline; 16, second solenoid valve; 17, pre-filter element; 18, post-filter element; 19, pressure gauge; 20, check valve; 21, control panel; 22, three-way valve. DETAILED DESCRIPTION

[0038] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0039] Embodiment 1:

[0040] like Figures 1 to 4 As shown, the embodiment of the present application provides a filter element structure, including: a filter element barrel body 1, one end of the filter element barrel body 1 has a raw water inlet 101, a pure water outlet 102 and a wastewater outlet 103; an RO membrane filter element 2, installed inside the filter element barrel body 1, a first pure water channel 3 is formed between the RO membrane filter element 2 and the inner wall of the filter element barrel body 1, one end of the first pure water channel 3 is connected to the pure water outlet 102, and the wastewater end of the RO membrane filter element 2 is connected to the wastewater outlet 103; a central pipe assembly 4, located in the middle of the RO membrane filter element 2, the central pipe assembly 4 has a connected inner layer pipe 401 and An outer tube 402, an inner tube 401 is located in the middle of the outer tube 402, a first water inlet channel 403 is provided between the inner tube 401 and the outer tube 402, one end of the first water inlet channel 403 is communicated with the raw water inlet 101, the other end of the first water inlet channel 403 is communicated with the water inlet end of the RO membrane filter element 2, a second pure water channel 404 is provided in the middle of the inner tube 401, a pure water flow channel 405 is provided on the outer tube 402, the pure water flow channel 405 is communicated with the second pure water channel 404, and the other end of the first pure water channel 3 is communicated with one end of the second pure water channel 404.

[0041] When the filter element structure of the embodiment of the present application is in use, the raw water entering through the raw water inlet 101 passes through the first water inlet channel 403 and then enters the RO membrane from the water inlet end of the RO membrane filter element 2 for filtration. The filtered pure water enters the second pure water channel 404 through the pure water flow channel 405, and then the pure water enters the first pure water channel 3 from the second pure water channel 404, and is finally output from the pure water outlet 102, and the filtered waste water is output through the waste water outlet 103. In the embodiment of the present application, the central tube assembly 4 is set as a double-layer structure, and the volume of pure water is increased by setting the second pure water channel 404 and the pure water flow channel 405, so that the volume of pure water stored in the filter element structure when it is stationary is greatly increased. Under the premise that the total volume of the filter element structure remains unchanged, the volume of the water inlet end and the waste water end is greatly reduced, thereby reducing the total amount of dissolved solids inside the filter element structure. Since the concentration is the ratio of the solute amount (the total amount of dissolved solids) to the solvent amount (the volume of pure water), the TDS value of pure water is reduced, achieving the effect of reducing the TDS value of pure water during the stationary process, and improving the TDS value of the first cup of water. The RO membrane filter element 2 can be rinsed with a large amount of pure water stored in the filter element structure to slow down the occurrence of forward osmosis and further improve the TDS value of the first cup of water.

[0042] In one embodiment, the first water inlet channel 403 extends along the axial direction of the central tube assembly 4, and the pure water flow channel 405 extends along the radial direction of the outer tube 402. There are multiple pure water flow channels 405, and the multiple pure water flow channels 405 are arranged at intervals along the axial direction of the outer tube 402. Preferably, two rows of pure water flow channels 405 can be arranged on the outer tube 402, and the two rows of pure water flow channels 405 are arranged opposite to each other on the outer tube 402.

[0043] The number of the first water inlet channels 403 in the embodiment of the present application may be one, two, three or more. Preferably, the number of the first water inlet channels 403 is four, and the four first water inlet channels 403 are arranged at intervals along the circumference of the inner tube 401 .

[0044] In order to achieve the communication between the second pure water channel 404 and the first pure water channel 3, the filter element structure further includes a filter element housing 5, and the RO membrane filter element 2 is installed inside the filter element housing 5. The middle part of the filter element housing 5 has a pure water outlet channel 501, one end of the second pure water channel 404 is connected to the pure water outlet channel 501, and the pure water outlet channel 501 is connected to the first pure water channel 3. The pure water entering the second pure water channel 404 can enter the first pure water channel 3 through the pure water outlet channel 501, and then enter the pure water outlet 102 to output the pure water.

[0045] In order to prevent the filtered pure water from directly entering the first pure water channel 3, the outer peripheral surface of the RO membrane filter element 2 is sealed to the inner wall of the filter element housing 5. Preferably, AB glue is used to seal the outer peripheral surface of the RO membrane filter element 2 and the inner wall of the filter element housing 5.

[0046] In one embodiment, a water outlet column 502 is provided at the center of the filter element housing 5, and the water outlet column 502 is sealed and connected to the inner wall of the inner layer tube 401, and the pure water outlet channel 501 is located inside the water outlet column 502. In order to achieve the sealed connection between the water outlet column 502 and the inner wall of the inner layer tube 401, a first sealing groove 503 may be provided on the outer peripheral surface of the water outlet column 502, and a first sealing ring 504 is installed in the first sealing groove 503, and the first sealing groove 503 is sealed and connected to the inner wall of the inner layer tube 401 through the first sealing ring 504.

[0047] In order to achieve the communication between the first water inlet channel 403 and the water inlet end of the RO membrane filter element 2, a raw water outlet channel 505 is provided between the filter element housing 5 and the end of the central tube assembly 4. The raw water outlet channel 505 is communicated with the other end of the first water inlet channel 403, and the first water inlet channel 403 is communicated with the water inlet end of the RO membrane filter element 2 through the raw water outlet channel 505. The tap water entering the first water inlet channel 403 enters the water inlet end of the RO membrane filter element 2 through the raw water outlet channel 505, and is filtered through the RO membrane.

[0048] In order to achieve the entry of tap water, the filter element structure also includes a water inlet end cover 6, which is installed at the wastewater end of the RO membrane filter element 2, and the inner wall of the water inlet end cover 6 is sealed and connected to the outer peripheral surface of the central tube assembly 4. The water inlet end cover 6 has a second water inlet channel 601, and the raw water inlet 101 communicates with the first water inlet channel 403 through the second water inlet channel 601. The tap water entering through the raw water inlet 101 first enters the second water inlet channel 601, and enters the first water inlet channel 403 through the second water inlet channel 601.

[0049] In order to achieve a sealed connection between the inner wall of the water inlet end cover 6 and the outer peripheral surface of the central tube assembly 4, a second sealing groove 602 is provided on the outer peripheral surface of the outer layer tube 402, a second sealing ring 603 is installed in the second sealing groove 602, and the second sealing groove 602 is sealedly connected to the inner wall of the water inlet end cover 6 through the second sealing ring 603. The second sealing groove 602 and the second sealing ring 603 are provided to prevent tap water from entering the RO membrane filter element 2 through the gap between the outer layer tube 402 and the water inlet end cover 6.

[0050] In one embodiment, the outer circumferential surface of the water inlet end cover 6 is sealed and connected to the inner wall of the raw water inlet 101. In order to achieve the sealed connection between the outer circumferential surface of the water inlet end cover 6 and the inner wall of the raw water inlet 101, a third sealing groove 604 is provided on the outer circumferential surface of the water inlet end cover 6, and a third sealing ring 605 is installed in the third sealing groove 604, and the third sealing groove 604 is sealed and connected to the inner wall of the raw water inlet 101 through the third sealing ring 605.

[0051] The filter element structure also includes a wastewater end cap 7, which is installed at the wastewater end of the RO membrane filter element 2, and the water inlet end cap 6 is located inside the wastewater end cap 7. A wastewater channel 701 is provided between the water inlet end cap 6 and the wastewater end cap 7, and the wastewater end of the RO membrane filter element 2 is connected to the wastewater outlet 103 through the wastewater channel 701. A mounting groove 702 is provided on the wastewater end cap 7, and the filter element housing 5 is inserted into the mounting groove 702, and the filter element housing 5 and the mounting groove 702 are sealed by AB glue.

[0052] In one embodiment, a fourth sealing groove 703 is provided on the outer peripheral surface of the wastewater end cover 7, and a fourth sealing ring 704 is installed in the fourth sealing groove 703. The outer peripheral surface of the wastewater end cover 7 is sealed and connected to the filter element barrel 1 through the fourth sealing ring 704.

[0053] The filter cartridge barrel body 1 of the embodiment of the present application includes a filter cartridge barrel 104 and a filter cartridge cover 105 . The filter cartridge barrel 104 and the filter cartridge cover 105 are detachably connected. The raw water inlet 101 , the pure water outlet 102 and the waste water outlet 103 are all arranged on the filter cartridge barrel 104 .

[0054] When assembling the filter element structure of the embodiment of the present application, the central tube assembly 4 is first used to roll the RO membrane to obtain a combination of the RO membrane filter element 2 and the central tube assembly 4. Then, the first sealing ring 504 is installed on the water outlet column 502 of the filter element housing 5, and the RO membrane filter element 2, the central tube assembly 4 and the filter element housing 5 are assembled together, and AB glue is used to seal the glue position reserved between the filter element housing 5 and the RO membrane filter element 2. Then, the second sealing ring 603 is installed on the outer peripheral surface of the outer tube 402, and the third sealing ring 605 is installed on the water inlet end cover 6, and then the water inlet end cover 6 is assembled. After the water inlet end cover 6 is assembled, the fourth sealing ring 704 is installed on the wastewater end cover 7 and the wastewater end cover 7 is assembled, and AB glue is applied between the wastewater end cover 7 and the filter element housing 5. Finally, the filter element barrel 104 is assembled, and the filter element cover 105 is spin-welded.

[0055] When the filter element structure of the embodiment of the present application is in use, tap water enters the second water inlet channel 601 of the water inlet end cover 6 through the raw water inlet 101, and then enters the first water inlet channel 403. After passing through the first water inlet channel 403, the tap water enters the water inlet end of the RO membrane filter element 2 from the raw water outlet channel 505 for filtration. The filtered pure water enters the second pure water channel 404 from the pure water flow channel 405, then enters the first pure water channel 3 from the pure water outlet channel 501, and finally outputs the pure water from the pure water outlet 102. The generated waste water enters the waste water end of the RO membrane filter element 2, and enters the waste water outlet 103 through the waste water channel 701 to be discharged.

[0056] In the embodiment of the present application, the central tube assembly 4 is set to a double-layer structure, and the first water inlet channel 403 and the pure water flow channel 405 are arranged in a cross-shaped vertical and horizontal arrangement, which increases the volume of pure water, greatly increases the volume of the pure water end when standing still, and greatly reduces the volume of the water inlet end and the concentrated water end. According to concentration = solute / solvent, the solute decreases and the solvent increases, and the concentration will decrease accordingly, thereby achieving the effect of reducing the TDS value of pure water during the standing process.

[0057] Embodiment 2:

[0058] The present embodiment is described in detail below in conjunction with the first embodiment:

[0059] like Figure 5As shown, the embodiment of the present application provides a test system for improving the performance of the first cup of water, which at least includes: a water inlet pipeline 8, one end of which is connected to an external water source, and a first solenoid valve 9 and a booster pump 10 are provided on the water inlet pipeline 8; a filter element structure as described in Example 1, the other end of the water inlet pipeline 8 is connected to the raw water inlet 101 of the filter element structure, the booster pump 10 is located between the first solenoid valve 9 and the filter element structure, the waste water outlet 103 of the filter element structure is connected to a waste water pipe 11, and a waste water solenoid valve 12 is provided on the waste water pipe 11, and a pure water outlet 102 of the filter element structure is connected to a pure water outlet pipe 13, and the pure water outlet pipe 13 is connected to a clean water faucet 14; a flushing pipeline 15, one end of the flushing pipeline 15 is connected to the pure water outlet pipe 13, and the other end of the flushing pipeline 15 is connected to the water inlet pipeline 8, and the connection between the flushing pipeline 15 and the water inlet pipeline 8 is located between the first solenoid valve 9 and the booster pump 10, and a second solenoid valve 16 is provided on the flushing pipeline 15.

[0060] In one embodiment, the test system further includes: a PPC filter element assembly, including a pre-filter element 17 and a post-filter element 18, wherein the water inlet end of the pre-filter element 17 is connected to an external water source, and the water outlet end of the pre-filter element 17 is connected to one end of the water inlet pipeline 8. The water inlet end of the post-filter element 18 is connected to the pure water outlet pipe 13, and the water outlet end of the post-filter element 18 is connected to the water purification tap 14.

[0061] In one embodiment, a pressure gauge 19 is provided on the water inlet pipe 8, and the pressure gauge 19 is located between the booster pump 10 and the filter element structure. A check valve 20 is provided on the water inlet pipe 8 and the flushing pipe 15, and an NFC chip is provided on the filter element structure and the PPC filter element assembly. The test system also includes a control panel 21, and the first solenoid valve 9, the second solenoid valve 16, the booster pump 10 and the wastewater solenoid valve 12 are all electrically connected to the control panel 21.

[0062] In order to achieve the connection between the flushing pipeline 15 and the pure water outlet pipe 13 and the water inlet pipe 8, three-way valves 22 are provided on the pure water outlet pipe 13 and the water inlet pipe 8. The flushing pipeline 15 is connected to the pure water outlet pipe 13 through the three-way valve 22 on the pure water outlet pipe 13. Similarly, the flushing pipeline 15 is connected to the water inlet pipe 8 through the three-way valve 22 on the water inlet pipe 8.

[0063] When the test system for improving the performance of the first cup of water of the embodiment of the present application is producing water, the first solenoid valve 9, the booster pump 10 and the waste water solenoid valve 12 are opened, and the second solenoid valve 16 is closed. The tap water is first delivered to the pre-filter element 17 for filtration, and the filtered pure water is delivered to the filter element structure through the booster pump 10 for filtration, and the filtered pure water is delivered to the post-filter element 18 through the pure water outlet pipe 13 for filtration, and the filtered pure water is delivered to the water purification faucet 14 to discharge pure water. After the water production stops, the flushing mode can be performed, the first solenoid valve 9 is closed, the second solenoid valve 16, the booster pump 10 and the waste water solenoid valve 12 are opened, and the booster pump 10 extracts the pure water in the filter element structure to flush the water inlet end and / or the waste water end, thereby emptying the residual pure water and tap water in the filter element structure and replacing them with pure water. After flushing, close the first solenoid valve 9, the second solenoid valve 16, the booster pump 10 and the waste water solenoid valve 12, and let the entire test system stand still. After standing for 1-48 hours, open the water purification tap 14 to take the first cup of water for testing, so that the TDS value of the first cup of water can be detected.

[0064] The PPC filter element assembly of the embodiment of the present application is an existing product, and there is no improvement on the structure of the PPC filter element assembly. The control method and control principle of the control panel 21 are all existing technologies.

[0065] Embodiment three:

[0066] The present embodiment is described in detail below with reference to the first and second embodiments:

[0067] On the third aspect, the embodiment of the present application provides a test method for improving the performance of the first cup of water. The test method is applied to the test system as described in the second embodiment, and the test method includes the following steps: configuring spiked water, in the water making mode, opening the first solenoid valve 9, the booster pump 10 and the wastewater solenoid valve 12, closing the second solenoid valve 16, and delivering spiked water to the filter element structure through the booster pump 10 and the water inlet pipe 8. The pure water filtered by the filter element structure is discharged through the pure water outlet pipe 13, and the wastewater filtered by the filter element structure is discharged through the wastewater outlet pipe 13. The water is discharged through the pipe 11; after the water making mode is over, the first solenoid valve 9 is closed, and the booster pump 10, the second solenoid valve 16 and the waste water solenoid valve 12 are opened. The booster pump 10 extracts pure water from the RO membrane filter element 2 of the filter element structure through the flushing pipe 15 to flush the water inlet end and / or the waste water end of the RO membrane filter element 2; after the flushing is completed, the first solenoid valve 9, the booster pump 10, the second solenoid valve 16 and the waste water solenoid valve 12 are closed to put the test system in a static state. After the static time is over, the clean water tap 14 is opened to take the first cup of water for testing.

[0068] In an embodiment, in the water production mode and flushing, the voltage of the booster pump 10 is adjusted so that the working pressure of the test system is 0.55-0.75 MPa. By controlling the voltage of the booster pump 10 (12-36V), the working pressure of the test system is consistent with the working pressure of the reverse osmosis water purifier actually used, and the working pressure is controlled at 0.55-0.75 MPa.

[0069] Among them, spiked water is water with spiked substances mentioned in the GB34914 standard, such as calcium chloride dihydrate, magnesium sulfate hexahydrate, sodium chloride, and sodium bicarbonate, added to simulate the water quality of different tap water in different regions. The spiked concentration of spiked water is 150-500ppm.

[0070] During flushing, the flushing time is 10-20 seconds, the flushing water volume is 175ml-800ml, and the TDS value of the pure water used for flushing is 750-1000mg / L. After the flushing is completed, the test system needs to be left to stand for 1-48 hours. In one embodiment, a reminder buzzer can be set on the test system, and a reminder is given through the buzzer after the standing time is over.

[0071] The embodiment of the present application uses a large amount of pure water stored in the filter element structure to flush the RO membrane filter element 2, and replaces the spiked water and wastewater with pure water, which greatly reduces the occurrence of forward osmosis and reduces the TDS value of pure water during the static process. Since different substances can be added to the spiked water to simulate the water quality of different regions, the TDS value test of the first cup of water under different water quality conditions is achieved.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0074] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. Filter element structure, characterized in that: include: A filter cartridge barrel body, one end of which has a raw water inlet, a pure water outlet and a waste water outlet; An RO membrane filter element is installed inside the filter element barrel body, a first pure water channel is formed between the RO membrane filter element and the inner wall of the filter element barrel body, one end of the first pure water channel is connected to the pure water outlet, and a wastewater end of the RO membrane filter element is connected to the wastewater outlet; A central tube assembly is located in the middle of the RO membrane filter element. The central tube assembly has a connected inner tube and an outer tube. The inner tube is located in the middle of the outer tube. A first water inlet channel is provided between the inner tube and the outer tube. One end of the first water inlet channel is communicated with the raw water inlet, and the other end of the first water inlet channel is communicated with the water inlet end of the RO membrane filter element. A second pure water channel is provided in the middle of the inner tube. A pure water flow channel is provided on the outer tube. The pure water flow channel is communicated with the second pure water channel, and the other end of the first pure water channel is communicated with one end of the second pure water channel.

2. The filter element structure according to claim 1, characterized in that: The first water inlet channel extends along the axial direction of the central tube assembly, the pure water flow channel extends along the radial direction of the outer tube, there are multiple pure water flow channels, and the multiple pure water flow channels are spaced apart along the axial direction of the outer tube.

3. The filter element structure according to claim 1, characterized in that: The filter element structure also includes: A filter element housing, wherein the RO membrane filter element is installed inside the filter element housing, a pure water outlet channel is provided in the middle of the filter element housing, one end of the second pure water channel is communicated with the pure water outlet channel, and the pure water outlet channel is communicated with the first pure water channel.

4. The filter element structure according to claim 3, characterized in that: A raw water outlet channel is provided between the filter element housing and the end of the central tube assembly, the raw water outlet channel is communicated with the other end of the first water inlet channel, and the first water inlet channel is communicated with the water inlet end of the RO membrane filter element through the raw water outlet channel.

5. The filter element structure according to any one of claims 1 to 4, characterized in that: The filter element structure also includes a water inlet end cover and a wastewater end cover, wherein the water inlet end cover is installed at the wastewater end of the RO membrane filter element, and the inner wall of the water inlet end cover is sealed and connected to the outer peripheral surface of the central tube assembly, and the water inlet end cover is provided with a second water inlet channel, and the raw water inlet is communicated with the first water inlet channel through the second water inlet channel; the wastewater end cover is installed at the wastewater end of the RO membrane filter element, and the water inlet end cover is located inside the wastewater end cover, and a wastewater channel is provided between the water inlet end cover and the wastewater end cover, and the wastewater end of the RO membrane filter element is communicated with the wastewater outlet through the wastewater channel.

6. A test system for improving the performance of the first glass of water, characterized in that: At least: A water inlet pipeline, one end of which is connected to an external water source, and a first solenoid valve and a booster pump are provided on the water inlet pipeline; The filter element structure according to any one of claims 1 to 5, wherein the other end of the water inlet pipeline is connected to the raw water inlet of the filter element structure, the booster pump is located between the first solenoid valve and the filter element structure, the waste water outlet of the filter element structure is connected to a waste water pipe, a waste water solenoid valve is provided on the waste water pipe, the pure water outlet of the filter element structure is connected to a pure water outlet pipe, and the pure water outlet pipe is connected to a clean water faucet; A flushing pipeline, one end of which is connected to the pure water outlet pipe, and the other end of which is connected to the water inlet pipeline. The connection between the flushing pipeline and the water inlet pipeline is located between the first solenoid valve and the booster pump. A second solenoid valve is provided on the flushing pipeline.

7. The testing system for improving the performance of the first glass of water according to claim 6, characterized in that: The test system also includes: The PPC filter element assembly includes a pre-filter element and a post-filter element, wherein the water inlet end of the pre-filter element is connected to the external water source, and the water outlet end of the pre-filter element is connected to one end of the water inlet pipeline; the water inlet end of the post-filter element is connected to the pure water outlet pipe, and the water outlet end of the post-filter element is connected to the water purification faucet.

8. The testing system for improving the performance of the first glass of water according to claim 7, characterized in that: A pressure gauge is provided on the water inlet pipeline, and the pressure gauge is located between the booster pump and the filter element structure. Check valves are provided on the water inlet pipeline and the flushing pipeline; NFC chips are provided on the filter element structure and the PPC filter element assembly; the test system also includes a control panel, and the first solenoid valve, the second solenoid valve, the booster pump and the wastewater solenoid valve are all electrically connected to the control panel.

9. A test method for improving the performance of the first glass of water, characterized in that: The test method is applied to the test system as claimed in any one of claims 6 to 8, and the test method comprises the following steps: Configure spiked water. In water production mode, open the first solenoid valve, booster pump and wastewater solenoid valve, close the second solenoid valve, and deliver spiked water to the filter element structure through the booster pump and the water inlet pipeline. Pure water filtered by the filter element structure is discharged through the pure water outlet pipe, and wastewater filtered by the filter element structure is discharged through the wastewater pipe. After the water production mode is over, the first solenoid valve is closed, and the booster pump, the second solenoid valve and the wastewater solenoid valve are opened. The booster pump extracts pure water from the RO membrane filter element of the filter element structure through the flushing pipeline to flush the water inlet end and / or wastewater end of the RO membrane filter element; After the flushing is completed, the first solenoid valve, the booster pump, the second solenoid valve and the waste water solenoid valve are closed to put the test system in a static state. After the static time is over, the clean water faucet is opened to take the first cup of water for testing.

10. The test method for improving the first glass of water performance according to claim 9, characterized in that: In the water production mode and flushing mode, the voltage of the booster pump is adjusted so that the working pressure of the test system is 0.55-0.75 MPa.

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