Waterway system for purified drinking equipment and purified drinking equipment

Abstract

The utility model relates to the technical field of water purification, particularly provides a water path system for water purification and drinking equipment and the water purification and drinking equipment, and aims to solve the problem that the use experience of a user is affected due to the fact that an existing water purifier cannot realize intelligent starting and stopping of a backflow mode. The water path system comprises a reverse osmosis membrane filter element, a backflow module and a detection assembly, the backflow module comprises a backflow pipeline, a water storage component and a driving pump, the water inlet end and the water outlet end of the backflow pipeline communicate with the pure water end and the water inlet end of the reverse osmosis membrane filter element correspondingly, and an outlet of the water storage component communicates with the backflow pipeline; the driving pump can drive water in the pure water end of the reverse osmosis membrane filter element and / or the water storage component to flow back to the water inlet end of the reverse osmosis membrane filter element; the detection assembly is used for detecting water quantity information in the water storage component; the detection assembly is in communication connection with the backflow module so as to start or end the backflow mode according to a detection signal of the detection assembly. Intelligent starting and stopping of the backflow mode can be achieved based on the water level in the water storage component, and the use experience of a user is improved.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology, specifically providing a water system and a water purification device for drinking water purification equipment. Background Technology

[0002] Reverse osmosis water purifiers commonly experience a higher TDS (Total Dissolved Solids) level in the first cup of water used after a period of standby. This is because the reverse osmosis membrane undergoes slow, natural permeation during standby, allowing high concentrations of inorganic salt ions in the concentrate to diffuse to the pure water side. Furthermore, if the membrane surface is not effectively rinsed over a long period, inorganic salt ions on the concentrate side will continuously accumulate and form scale, leading to membrane blockage, reduced water production efficiency, and shortened filter life.

[0003] In existing technologies, some RO water purifiers use pure water recirculation to solve the problem of high TDS in the first cup of water. The method is to recirculate pure water back to the front of the RO membrane and mix it with the raw water to repeatedly replace or neutralize the concentrated water in front of the membrane. However, this method has low efficiency in replacing the concentrated water on the membrane surface and is difficult to completely solve the problems of ion diffusion and scaling, resulting in poor performance.

[0004] Some water purifiers store pure water in a pressure tank and use the stored pure water to flush the reverse osmosis membrane after water purification. However, these types of water purifiers cannot start or stop the pure water recirculation at the right time, which makes it impossible to achieve intelligent start and stop of the recirculation mode and affects the user experience. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problems to at least a certain extent, that is, to at least a certain extent solve the problem that the existing water purifiers affect the user experience because they cannot realize intelligent start and stop of the backflow mode.

[0006] In a first aspect, the present invention provides a water system for a water purification device, the water system having at least a reflux mode, the water system comprising: a reverse osmosis membrane filter cartridge, the inlet end of which is connected to a main inlet water channel; a reflux module comprising a reflux pipe, a water storage component, and a drive pump, wherein the inlet end of the reflux pipe is connected to the pure water end of the reverse osmosis membrane filter cartridge, the outlet end of the reflux pipe is connected to the inlet end of the reverse osmosis membrane filter cartridge, the outlet of the water storage component is connected to the reflux pipe, and the drive pump is configured to drive water from the pure water end of the reverse osmosis membrane filter cartridge and / or the water storage component back to the inlet end of the reverse osmosis membrane filter cartridge when the water system is in the reflux mode; and a detection component for detecting water volume information in the water storage component; wherein the detection component is communicatively connected to the reflux module so as to selectively start or stop the reflux mode according to the detection signal of the detection component.

[0007] In the preferred technical solution of the water circuit system for the above-mentioned drinking water equipment, the detection component includes a high liquid level detection component, which is used to detect a preset first high liquid level in the water storage component. The high liquid level detection component is communicatively connected to the reflux module so as to selectively enable the reflux module to start the reflux mode according to the detection result of the high liquid level detection component.

[0008] In the preferred technical solution of the water circuit system for the above-mentioned drinking water equipment, the detection component further includes an overflow level detection component, which is used to detect a preset second high liquid level in the water storage component. The second high liquid level is higher than the first high liquid level. The overflow level detection component is communicatively connected to the reflux module so that the reflux module can be selectively activated in reflux mode according to the detection result of the overflow level detection component.

[0009] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the return pipeline includes a first return branch and a first return valve disposed on the first return branch. The inlet end of the first return branch can be connected to the pure water end of the reverse osmosis membrane filter element, and the outlet end of the first return branch is connected to the inlet end of the reverse osmosis membrane filter element. The water storage component is disposed in series on the first return branch, and the first return valve is disposed at the downstream end of the water storage component. The detection component is communicatively connected to the first return valve.

[0010] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the reflux mode includes pure water reflux operation and mixed water reflux operation. Under the pure water reflux operation, the pure water in the water storage component can be refluxed back to the reverse osmosis membrane filter element through the reflux pipeline. Under the mixed water reflux operation, the water circuit system is configured to enable the pure water at the pure water end of the reverse osmosis membrane filter element to be refluxed back to the inlet end of the reverse osmosis membrane filter element through the reflux pipeline and mixed with the raw water in the main inlet pipeline before being refluxed back to the reverse osmosis membrane filter element.

[0011] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the return pipeline includes a first return branch and a second return branch. The inlet ends of the first return branch and the second return branch can be connected to the pure water end of the reverse osmosis membrane filter element, and the outlet ends of the first return branch and the second return branch are connected to the inlet end of the reverse osmosis membrane filter element. The water storage component is arranged in series on the first return branch. The return module also includes a control component. The control component can selectively conduct the first return branch and / or the second return branch. The detection component is communicatively connected to the control component.

[0012] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the control component includes a water supply valve and a first return valve disposed on the first return branch and a second return valve disposed on the second return branch. The water supply valve is disposed between the inlet end of the first return branch and the inlet of the water storage component, and the first return valve is disposed between the outlet end of the first return branch and the outlet. Alternatively, the control component includes a first reversing valve and a water supply valve. The outlet of the water storage component is connected to the first interface of the first reversing valve, the outlet end of the second return branch is connected to the second interface of the first reversing valve, the third interface of the first reversing valve is connected to the inlet end of the reverse osmosis membrane filter element, and the water supply valve is disposed between the inlet end of the first return branch and the inlet of the water storage component. The third interface of the first reversing valve can selectively connect to either the first interface or the second interface. Alternatively, the control component includes a first return valve and a second reversing valve. The first return valve is disposed between the outlet end of the first return branch and the outlet. The first port of the second reversing valve is connected to the inlet of the water storage component, the second port of the second reversing valve is connected to the inlet of the second reflux branch, and the third port of the second reversing valve is connected to the pure water end of the reverse osmosis membrane filter element. The third port of the second reversing valve can selectively connect to either the first or second port. Alternatively, the control component includes a first reversing valve and a second reversing valve, wherein the outlet of the water storage component is connected to the first port of the first reversing valve, the outlet of the second reflux branch is connected to the second port of the first reversing valve, the third port of the first reversing valve is connected to the inlet of the reverse osmosis membrane filter element, and the third port of the first reversing valve can selectively connect to either the first or second port; the first port of the second reversing valve is connected to the inlet of the water storage component, the second port of the second reversing valve is connected to the inlet of the second reflux branch, and the third port of the second reversing valve is connected to the pure water end of the reverse osmosis membrane filter element. The third port of the second reversing valve can selectively connect to either the first or second port.

[0013] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the water circuit system further includes a flow control component, which is configured to adjust the ratio between the flow rate of pure water flowing into the reverse osmosis membrane filter element through the return pipe and the flow rate of raw water flowing into the reverse osmosis membrane filter element through the main inlet pipe.

[0014] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the flow control component includes a first flow control component and a second flow control component. The first flow control component is disposed on the return pipe and is used to regulate the flow rate of pure water flowing into the reverse osmosis membrane filter element through the return pipe. The second flow control component is disposed on the main inlet pipe and is used to regulate the flow rate of raw water flowing into the reverse osmosis membrane filter element through the main inlet pipe. Alternatively, the flow control component includes a proportional regulating valve. The first inlet of the proportional regulating valve is connected to the outlet end of the return pipe, the second inlet of the proportional regulating valve is connected to the outlet end of the main inlet pipe, and the outlet of the proportional regulating valve is connected to the inlet end of the reverse osmosis membrane filter element.

[0015] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the water circuit system further includes an inlet water quality detection component. The inlet water quality detection component is used to detect the water quality information in the main inlet water channel. The inlet water quality detection component is communicatively connected to the flow control component so as to adjust the ratio between the pure water flow rate flowing into the reverse osmosis membrane filter element through the return pipe and the raw water flow rate flowing into the reverse osmosis membrane filter element through the main inlet water channel according to the detection data of the inlet water quality detection component.

[0016] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the outlet end of the return pipeline is connected to the upstream end of the booster pump. The return mode includes pure water circulation operation. Under the pure water circulation operation, the booster pump can also drive at least a portion of the pure water in the water storage component to enter from the inlet end of the reverse osmosis membrane filter element and return from its pure water end to its inlet end or back to the water storage component, so as to circulate and flush the reverse osmosis membrane filter element.

[0017] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the return pipeline includes a first return branch, the inlet end of the first return branch can be connected to the pure water end of the reverse osmosis membrane filter element, the outlet end of the first return branch is connected to the inlet end of the booster pump, and the water storage component is connected in series on the first return branch. Under the pure water circulation operation, the inlet and outlet ends of the booster pump, the inlet and pure water ends of the reverse osmosis membrane filter element, and the inlet and outlet ends of the first return branch are connected in sequence to form a circulation loop.

[0018] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the return pipeline includes a second return branch. The inlet end of the second return branch can be connected to the pure water end of the reverse osmosis membrane filter element, and the outlet end of the second return branch is connected to the inlet end of the booster pump. Under the pure water circulation operation, the inlet and outlet ends of the booster pump, the inlet and pure water ends of the reverse osmosis membrane filter element, and the inlet and outlet ends of the second return branch are sequentially connected to form a circulation loop. The outlet of the water storage component is connected to the circulation loop.

[0019] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the driving pump includes a booster pump, the inlet end of which is connected to the main water inlet, and the outlet end of which is connected to the inlet end of the reverse osmosis membrane filter element. The booster pump is used to transport the pure water end of the reverse osmosis membrane filter element and / or the pure water in the water storage component to the inlet end of the reverse osmosis membrane filter element. The detection component is communicatively connected to the booster pump. And / or, the driving pump includes a self-priming pump, which is installed on the return pipeline and is used to transport the pure water in the water storage component to the inlet end of the reverse osmosis membrane filter element. The detection component is communicatively connected to the self-priming pump.

[0020] In the preferred technical solution of the water circuit system for the above-mentioned drinking water equipment, the detection component includes a low liquid level detection component, which is used to detect a preset low liquid level in the water storage component. The low liquid level detection component is communicatively connected to the reflux module so as to selectively cause the reflux module to end the reflux mode according to the detection signal of the low liquid level detection component.

[0021] In the preferred embodiment of the water system for the above-mentioned drinking water purification equipment, the water system further includes a pre-filtration unit, the inlet of which is connected to a water source, and the outlet of which is connected to the inlet of the reverse osmosis membrane filter element through the main inlet channel; and / or, the water system further includes a post-filtration unit, the pure water end of the reverse osmosis membrane filter element is connected to the inlet of the post-filtration unit, the inlet of the water storage component is connected to the outlet of the post-filtration unit, and the reflux module is configured to drive the pure water at the outlet of the post-filtration unit and / or the pure water in the water storage component to reflux back to the inlet of the reverse osmosis membrane filter element.

[0022] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the water circuit system further includes a water outlet component and a water replenishment module. The pure water end of the reverse osmosis membrane filter element is connected to the water outlet component through a pure water output pipe so as to output pure water from the pure water end of the reverse osmosis membrane filter element. The water replenishment module is configured to enable the pure water end of the reverse osmosis membrane filter element to be connected to the inlet of the water storage component so as to replenish water to the water storage component. The water outlet component is communicatively connected to the water replenishment module so as to selectively control the opening and closing of the water replenishment module according to the water outlet status of the water outlet component.

[0023] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the water outlet component includes a mechanical faucet and a high-pressure switch. The high-pressure switch is installed on the pure water output pipe and is used to detect the water pressure in the pure water output pipe to provide feedback on the water outlet status of the water outlet component. The high-pressure switch is communicatively connected to the water replenishment module.

[0024] In the preferred technical solution of the water circuit system for the above-mentioned drinking water purification equipment, the water outlet component includes an electrically controlled faucet and a pure water outlet valve. The pure water outlet valve is installed on the pure water output pipe and is used to control the opening and closing of the pure water output pipe. The electrically controlled faucet is communicatively connected to the pure water outlet valve so as to cut off the pure water output pipe when the electrically controlled faucet is closed. The electrically controlled faucet and / or the pure water outlet valve are communicatively connected to the water replenishment module.

[0025] In a second aspect, the present invention also provides a water purification device, the water purification device including the water circuit system for a water purification device described in any of the first aspects.

[0026] By adopting the above technical solution and communicating with the detection component and the reflux module, the reflux mode can be automatically started and stopped based on the water volume in the water storage component. On the one hand, when water production ends and the water storage component is full of pure water, the system automatically switches to reflux mode to promptly flush or soak the reverse osmosis membrane filter element, effectively solving the problems of membrane scaling and high TDS value of the first cup of water, and extending the service life of the reverse osmosis membrane filter element. On the other hand, when the water level in the water storage component is too low, it automatically stops to prevent the drive pump from running dry, ensuring the safety of the system and saving energy, greatly improving the user experience.

[0027] Furthermore, the detection component is configured to include a high-level detection element. When the high-level detection element detects that the water level in the water storage component has reached the preset high level, it can promptly transmit a signal to the reflux module, enabling the water purifier to activate the reflux mode. On the one hand, this avoids activating the reflux mode too early, which could prevent the water storage component from being filled with water, thus avoiding affecting subsequent reflux operations due to water shortage in the water storage component. On the other hand, it also avoids activating the reflux mode too late, which could prevent timely rinsing or pure water soaking of the reverse osmosis membrane filter after water purification. This ensures that membrane maintenance is always carried out under conditions of abundant water supply and optimal timing, optimizing maintenance effectiveness and resource utilization.

[0028] Furthermore, by setting up an anti-overflow level detection component, when the high-level detection component malfunctions or fails, the detection result of the anti-overflow level detection component is promptly transmitted to the control component, causing the water purifier to stop supplying pure water to the water storage component, preventing water from overflowing from the water storage component, providing double protection for water replenishment of the water storage component, enhancing the overall safety of the system, and further improving the user experience.

[0029] Furthermore, by configuring the control components to selectively conduct the first return branch and / or the second return branch, the return mode can be easily switched according to different usage scenarios or needs. The water at the pure water end of the reverse osmosis membrane filter element can be selectively returned via the first return branch or via the second return branch, or returned via both the first and second return branches to the inlet end of the reverse osmosis membrane filter element, thus meeting the application needs of users in different usage scenarios.

[0030] Furthermore, by setting up a flow control component, the ratio between the pure water flow rate returning through the first reflux branch and the raw water flow rate flowing into the inlet of the reverse osmosis membrane filter element through the main inlet channel can be adjusted. This allows for easy adjustment of the pure water flow rate and the raw water flow rate based on the water quality in the main inlet channel. When the water quality in the main inlet channel is good, the raw water flow rate can be appropriately increased, thus saving more pure water. When the water quality in the main inlet channel is poor, the raw water flow rate can be appropriately reduced to avoid affecting the rinsing effect on the reverse osmosis membrane filter element due to poor water quality after mixing. This balances the pure water consumption and the rinsing effect on the reverse osmosis membrane filter element in reflux mode.

[0031] Furthermore, by setting the reflux mode to include pure water circulation, at least a portion of the pure water in the water storage component flows into the reverse osmosis membrane filter under the drive of the booster pump. After being filtered by the reverse osmosis membrane filter, it flows out from its pure water end and returns to the inlet end of the booster pump to rinse the reverse osmosis membrane filter. On the one hand, it can achieve pure water production from pure water, greatly reducing the TDS value of the pure water before the reverse osmosis membrane filter, allowing the reverse osmosis membrane filter to be immersed in pure water with a higher desalination rate, thus extending the service life of the reverse osmosis membrane filter. On the other hand, since the pure water in the water storage component circulates and rinses in the circulation loop, it can achieve a larger volume of pure water rinsing with a limited water volume, thereby making the water storage component smaller. This avoids affecting the ease of installation of the drinking water purification equipment due to the excessive size of the water storage component, greatly improving the user experience.

[0032] Furthermore, by installing a low-level detection component inside the water storage component, it is possible to detect whether the water level in the water storage component has reached the preset low level. When the water level in the water storage component is detected to have reached the preset low level, a signal is transmitted to the self-priming pump or the booster pump to end the reflux mode and avoid the self-priming pump or the booster pump from running dry due to insufficient water in the water storage component.

[0033] Furthermore, the system can control the opening and closing of the water replenishment module based on the water output status of the water output component, achieving intelligent control of water replenishment and intake. On the one hand, when the water output component stops discharging water, it transmits a signal to the water replenishment module, connecting the pure water end of the reverse osmosis membrane filter cartridge with the inlet of the water storage component, thereby replenishing the water storage component in a timely manner and achieving automatic water replenishment. On the other hand, when the water output component discharging water or discharging water again, it transmits a signal to the water replenishment module, cutting off the pure water end of the reverse osmosis membrane filter cartridge from the inlet of the water storage component. The water filtered by the reverse osmosis membrane filter cartridge flows out of the water output component through the pure water output pipe, avoiding disruption to the user's normal water use due to water replenishment.

[0034] Furthermore, the present invention provides a further improved water purification device based on the aforementioned water system for water purification equipment. Because it can execute the aforementioned water system for water purification equipment, it possesses the beneficial effects of the aforementioned water system for water purification equipment. Compared with the previous water purification device, the water purification device of the present invention has more timely and intelligent start and stop of the reflux mode, lower TDS value of the first cup of water, longer service life of the reverse osmosis membrane filter element, smaller size, higher installation convenience, and better user experience. Attached Figure Description

[0035] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0036] Figure 1 This is a schematic diagram of the water circuit connection of a water circuit system for a water purification device according to Embodiment 1 of the present invention;

[0037] Figure 2 This is a schematic diagram of the water circuit connection of Embodiment 2 of the water circuit system for a water purification device of this utility model;

[0038] Figure 3 This is a schematic diagram of the water circuit connection of Embodiment 3 of the water circuit system for the water purification equipment of this utility model;

[0039] Figure 4 This is a schematic diagram of the water circuit connection of Embodiment 4 of the water circuit system for a water purification device of this utility model;

[0040] Figure 5 This is a schematic diagram of the water circuit connection of Embodiment 5 of the water circuit system for a water purification device of this utility model;

[0041] Figure 6 This is a schematic diagram of the water circuit connection of Embodiment Six of the water circuit system for a water purification device of this utility model;

[0042] Figure 7 This is a schematic diagram of the water circuit connection of a second embodiment of the water circuit system for a water purification device of this utility model, which shows the water flow direction of the water purification device in water purification mode;

[0043] Figure 8 This is a schematic diagram of the water circuit connection of a second embodiment of the water circuit system for a water purification device of this utility model, which shows the water flow direction when the water storage component of the water purification device is replenished with water;

[0044] Figure 9 This is a schematic diagram of the water circuit connection of a water circuit system for a water purification device according to a second embodiment of the present invention, which shows the water flow direction of the water purification device when mixing and returning water through the second return branch.

[0045] Figure 10 This is a schematic diagram of the water circuit connection of a water circuit system for a water purification device according to a second embodiment of the present invention, which shows the water flow direction when the water purification device returns through the first return branch.

[0046] Figure 11 This is a schematic diagram of the water circuit connection of a water circuit system for a water purification device according to a second embodiment of the present invention, which shows the water flow direction of the water purification device when pure water is circulated back through the first return branch.

[0047] Figure 12 This is a schematic diagram of the water circuit connection of a water circuit system for a water purification device according to Embodiment 2 of the present invention, which shows the water flow direction when the water purification device circulates pure water back through the second return branch.

[0048] List of reference numerals in the attached diagram:

[0049] 1. Reverse osmosis membrane filter element; 11. Inlet pipe; 111. Inlet valve; 112. First TDS value detection component; 113. First flow meter; 12. Clean water outlet pipe; 121. Clean water outlet valve; 122. Clean water outlet interface; 13. Main inlet pipe; 2. First return branch; 201. Inlet pipe section; 202. Outlet pipe section; 15. Wastewater pipe; 150. Wastewater outlet; 151. Wastewater valve; 152. Third TDS value detection component; 153. Stop valve; 21. Water storage component; 211. Inlet; 212. Outlet; 213. Low liquid level detection component; 214. High liquid level detection component; 215. Overflow prevention liquid level detection component; 22. First check valve; 23. Manifold; 3. Second return branch; 31. Second check valve; 41. First reflux valve; 42. Second reflux valve; 43. Water supply valve; 44. First reversing valve; 45. Second reversing valve; 5. Composite filter element; 51. Pre-filter unit; 52. Post-filter unit; 53. Pure water pipe; 531. Third check valve; 532. Second TDS value detection component; 61. Booster pump; 62. Self-priming pump; 71. First flow control component; 72. Second flow control component; 73. Proportional regulating valve; 81. Pure water output pipe; 811. Fourth check valve; 812. Second flow meter; 821. Mechanical faucet; 822. Electric faucet; 831. High-pressure switch; 832. Pure water outlet valve; 84. Pure water supply pipe; 841. Pure water interface. Detailed Implementation

[0050] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0051] It should be noted that in the description of this utility model, terms such as "upper" and "lower," which indicate direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] like Figures 1 to 6As shown, the water system of this utility model has at least a water production mode and a reflux mode. The water system of this application includes a reverse osmosis membrane filter element 1, a reflux module and a detection component. The water inlet end of the reverse osmosis membrane filter element 1 is connected to the main water inlet channel 13.

[0054] The reflux module includes a reflux pipeline, a water storage component 21, and a drive pump. The inlet end of the reflux pipeline can be connected to the pure water end of the reverse osmosis membrane filter element 1, and the outlet end of the reflux pipeline is connected to the inlet end of the reverse osmosis membrane filter element 1. The outlet 212 of the water storage component 21 is connected to the reflux pipeline. The drive pump is configured to drive the pure water at the pure water end of the reverse osmosis membrane filter element 1 and / or the pure water in the water storage component 21 back to the inlet end of the reverse osmosis membrane filter element 1. It should be noted that the inlet end of the reflux pipeline can be directly connected to the pure water end of the reverse osmosis membrane filter element 1 (not shown in the figure), or the inlet end of the reflux pipeline can also be connected to the pure water end of the reverse osmosis membrane filter element 1 through a post-filtration unit 52 (e.g., Figures 1 to 6 (As shown). Preferably, the inlet end of the return pipeline is connected to the pure water end of the reverse osmosis membrane filter element 1 through the post-filtration unit 52.

[0055] The detection component is used to detect the water volume information in the water storage component 21. The detection component is communicatively connected to the return module so that the return module can be selectively activated according to the detection signal of the detection component.

[0056] By connecting the detection component to the reflux module, the reflux mode can be automatically started and stopped based on the water level in the water storage component 21. On the one hand, when the water storage component 21 is full of pure water, the system automatically switches to reflux mode to promptly flush or soak the reverse osmosis membrane filter element 1, effectively solving the problems of membrane scaling and high TDS value of the first cup water, thus extending the service life of the reverse osmosis membrane filter element 1. On the other hand, when the water level in the water storage component 21 is too low, it automatically stops to prevent the drive pump from running dry, ensuring system safety and saving energy, and greatly improving the user experience.

[0057] It should be noted that this utility model does not limit the specific type of the water storage component 21. For example, the water storage component 21 can be set as a water tank, or as a pressure tank, or as a water storage container, etc. Such adjustments and changes to the specific type of the water storage component 21 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0058] Preferably, the water storage component 21 is a water tank.

[0059] It should be noted that, in practical applications, those skilled in the art can configure the pure water end of the reverse osmosis membrane filter element 1 to be connected to the inlet 211 of the water storage component 21, so that the pure water filtered by the reverse osmosis membrane filter element 1 is stored in the water storage component 21. Alternatively, the water storage component 21 can be configured to have a water inlet, through which the user adds water to the water storage component 21, etc. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should all be included within the protection scope of this utility model.

[0060] Preferably, the water purification device of this utility model also has a water production mode. In the water production mode, the pure water end of the reverse osmosis membrane filter element 1 is connected to the inlet 211 of the water storage component 21 so that the pure water filtered by the reverse osmosis membrane filter element 1 flows into the water storage component 21.

[0061] It should be noted that this utility model does not impose any restrictions on the specific type of the detection component, as long as it can detect the amount of water in the water storage component 21.

[0062] In one specific embodiment, the detection component includes a liquid level detection component, and the water volume information is the liquid level height. The liquid level height in the water storage component 21 is directly detected by the liquid level detection component, thereby detecting the water volume in the water storage component 21.

[0063] In another specific example, the detection component includes a pressure sensor, and the water volume information is the weight of the water. The weight of the water storage component 21 is detected by the detection data of the pressure sensor, and then the weight of the water in the water storage component 21 is fed back.

[0064] In another possible specific instance, the detection component includes a camera, and the water volume information is obtained by comparing the image captured by the camera with a preset image.

[0065] Preferably, the detection component includes a liquid level detection component, which detects the liquid level height in the water storage component 21, thereby detecting the amount of water in the water storage component 21.

[0066] Preferably, such as Figures 1 to 6 As shown, the detection component includes a high liquid level detection component 214, which is used to detect a preset first high liquid level in the water storage component 21. The high liquid level detection component 214 is communicatively connected to the reflux module so that the reflux module can be selectively activated in reflux mode according to the detection result of the high liquid level detection component 214.

[0067] With this setup, when the high-level detection component 214 detects that the water level in the water storage component 21 has reached the preset high level, it can promptly transmit a signal to the reflux module, enabling the water purifier to activate the reflux mode. On the one hand, this avoids activating the reflux mode too early, which would prevent the water storage component 21 from being filled with water, thus avoiding the impact on subsequent reflux operations due to water shortage in the water storage component 21. On the other hand, it also avoids activating the reflux mode too late, which would prevent the reverse osmosis membrane filter element 1 from being rinsed or soaked in pure water in time after water purification. This ensures that membrane maintenance is always carried out under conditions of abundant water supply and the most suitable timing, optimizing maintenance effectiveness and resource utilization.

[0068] Preferably, such as Figures 1 to 6 As shown, the detection component also includes an overflow level detection component 215, which is used to detect a preset second high level in the water storage component 21. The second high level is higher than the first high level. The overflow level detection component 215 is communicatively connected to the reflux module so that the reflux module can be selectively activated in reflux mode based on the detection result of the overflow level detection component 215.

[0069] With this configuration, by setting up the anti-overflow level detection component 215, when the high level detection component 214 malfunctions or fails, the detection result of the anti-overflow level detection component 215 is promptly transmitted to the control component, causing the water purifier to stop supplying pure water to the water storage component 21, preventing water from overflowing from the water storage component 21. This provides double protection for the replenishment of water to the water storage component 21, enhances the overall safety of the system, and further improves the user experience.

[0070] It should be noted that those skilled in the art can determine the specific values ​​of the first and second highest liquid levels based on experience or experimentation.

[0071] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific reflux method of the reflux module. For example, the reflux module can be configured to directly reflux the pure water in the water storage component 21 to the inlet end of the reverse osmosis membrane filter element 1, squeezing out the residual raw water in the reverse osmosis membrane filter element 1, so that the reverse osmosis membrane filter element 1 is immersed in pure water. Alternatively, the reflux module can be configured to directly reflux the pure water from the pure water end of the reverse osmosis membrane filter element 1 to the inlet end of the reverse osmosis membrane filter element 1, and mix it with the raw water. After mixing, the water flows into the reverse osmosis membrane filter element 1. Alternatively, the pure water from the pure water end of the reverse osmosis membrane filter element 1 can be refluxed to the inlet end of the reverse osmosis membrane filter element 1 and mixed with the raw water before flowing into the reverse osmosis membrane filter element 1 to dilute or squeeze out the raw water in the reverse osmosis membrane filter element 1. Then, the pure water in the water storage component 21 is refluxed back into the reverse osmosis membrane filter element 1, and so on. Such adjustments and changes to the specific reflux method of the reflux module do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0072] The recirculation module of this utility model will be described below with reference to the following two embodiments.

[0073] Example 1:

[0074] The reflux mode only includes pure water reflux operation. Under pure water reflux operation, the pure water in the water storage component 21 can be refluxed back to the reverse osmosis membrane filter element 1 through the reflux pipeline.

[0075] Specifically, such as Figure 1 As shown, the reflux pipeline includes a first reflux branch 2. The inlet end of the first reflux branch 2 can be connected to the pure water end of the reverse osmosis membrane filter element 1, and the outlet end of the first reflux branch 2 is connected to the inlet end of the reverse osmosis membrane filter element 1. The water storage component 21 is connected in series on the first reflux branch 2. The reflux module also includes a water supply valve 43 and a first reflux valve 41. The water supply valve 43 is located at the upstream end of the water storage component 21, and the first reflux valve 41 is located at the downstream end of the water storage component 21. The detection component is communicatively connected to the first reflux valve 41.

[0076] When the water system is in water production mode and the user finishes taking water, the water supply valve 43 is opened, allowing pure water from the pure water end of the reverse osmosis membrane filter element 1 to flow into the water storage component 21, replenishing the water storage component 21. When the detection component detects that the water level in the water storage component 21 reaches the preset first high level or second high level, it transmits a signal to the first return valve 41, opens the first return valve 41, and drives the pump to return the pure water in the water storage component 21 to the inlet end of the reverse osmosis membrane filter element 1 through the first return branch 2. The pure water squeezes out the raw water in the reverse osmosis membrane filter element 1, and the raw water in the reverse osmosis membrane filter element 1 is completely replaced with pure water, so that the reverse osmosis membrane filter element 1 is always immersed in pure water when the water purification equipment is stopped, which can prevent membrane scaling and solve the problem of excessive TDS value in the first cup of water.

[0077] Specifically, the first return branch 2 includes an inlet pipe section 201 and an outlet pipe section 202. The water supply valve 43 is installed on the inlet pipe section 201, and the first return valve 41 is installed on the outlet pipe section 202.

[0078] Example 2:

[0079] The reflux mode includes pure water reflux operation and mixed water reflux operation. Under pure water reflux operation, the pure water in the water storage component 21 can be refluxed back to the reverse osmosis membrane filter element 1 through the reflux pipeline. Under mixed water reflux operation, the water circuit system is set to enable the pure water at the pure water end of the reverse osmosis membrane filter element 1 to be refluxed back to the inlet end of the reverse osmosis membrane filter element 1 through the reflux pipeline and mixed with the raw water in the main inlet water line 13 before being refluxed back to the reverse osmosis membrane filter element 1.

[0080] Preferably, such as Figures 2 to 6As shown, the reflux pipeline includes a first reflux branch 2 and a second reflux branch 3. The inlet ends of both the first reflux branch 2 and the second reflux branch 3 can be connected to the pure water end of the reverse osmosis membrane filter element 1. The outlet ends of both the first reflux branch 2 and the second reflux branch 3 are connected to the inlet end of the reverse osmosis membrane filter element 1. The water storage component 21 is connected in series on the first reflux branch 2. The reflux module also includes a control component. The control component can selectively conduct the first reflux branch 2 and / or the second reflux branch 3. The detection component is communicatively connected to the control component.

[0081] With this setup, when the water system is in water production mode and the user finishes taking water, pure water from the pure water end of the reverse osmosis membrane filter 1 flows into the water storage component 21 to replenish the water storage component 21. When the detection component detects that the water level in the water storage component 21 reaches the preset first high level or second high level, it transmits a signal to the control component. The control component then activates the first return branch 2 and / or the second return branch 3, driving the pump to drive the pure water in the water storage component 21 to return to the inlet end of the reverse osmosis membrane filter 1 through the first return branch 2, or to drive the pure water from the pure water end of the reverse osmosis membrane filter 1 to return to the inlet end of the reverse osmosis membrane filter 1. The pure water squeezes out the raw water in the reverse osmosis membrane filter 1, and the raw water in the reverse osmosis membrane filter 1 is completely replaced with pure water. This ensures that the reverse osmosis membrane filter 1 is always immersed in pure water when the water purifier is stopped, which can prevent membrane scaling and solve the problem of excessive TDS value in the first cup of water.

[0082] In one specific embodiment, when the reflux mode is started, only the first reflux branch 2 can be opened, and the pump can drive the pure water in the water storage component 21 to flow back to the inlet of the reverse osmosis membrane filter element 1, squeezing out the raw water in the reverse osmosis membrane filter element 1, so that the reverse osmosis membrane filter element 1 is immersed in pure water.

[0083] In another specific embodiment, when the reflux mode is started, only the second reflux branch 3 is connected, and the drive pump drives the pure water at the pure water end of the reverse osmosis membrane filter element 1 to reflux to the inlet end of the reverse osmosis membrane filter element 1. The pure water dilutes the raw water in the reverse osmosis membrane filter element 1.

[0084] In another possible embodiment, when starting the reflux mode, the second reflux branch 3 can be first opened, and the pump can drive the pure water at the pure water end of the reverse osmosis membrane filter element 1 to flow back to the inlet end of the reverse osmosis membrane filter element 1. After mixing with the raw water in the main inlet water line 13, they are jointly transported into the reverse osmosis membrane filter element 1 to rinse the reverse osmosis membrane filter element 1 and dilute the raw water in the reverse osmosis membrane filter element 1. Then, the first reflux branch 2 is opened, and the pump can drive the pure water in the water storage component 21 to flow back to the inlet end of the reverse osmosis membrane filter element 1. The pure water squeezes out the raw water in the reverse osmosis membrane filter element 1, and the raw water in the reverse osmosis membrane filter element 1 is completely replaced with pure water. This ensures that the reverse osmosis membrane filter element 1 is always immersed in pure water when the water purifier is stopped, which can prevent membrane scaling and solve the problem of excessive TDS value in the first cup of water.

[0085] Preferably, when starting the reflux mode, the second reflux branch 3 is turned on first, and then the first reflux branch 2 is turned on. In this way, by mixing and refluxing first, and then refluxing pure water, the amount of pure water used can be saved, thus making the water storage component 21 smaller. It also allows the reverse osmosis membrane filter element 1 to be immersed in pure water with a higher desalination rate, which can more effectively prevent membrane scaling and extend the service life of the reverse osmosis membrane filter element 1, greatly improving the user experience.

[0086] It should be noted that although the present invention describes the reflux module using the two embodiments described above, this is not limiting. Any other reflux mode that can perform reflux and rinse or soak the reverse osmosis membrane filter element does not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0087] Preferably, such as Figures 2 to 6 As shown, the reflux pipeline includes a first reflux branch 2 and a second reflux branch 3. The inlet ends of both the first reflux branch 2 and the second reflux branch 3 can be connected to the pure water end of the reverse osmosis membrane filter element 1. The outlet ends of both the first reflux branch 2 and the second reflux branch 3 are connected to the inlet end of the reverse osmosis membrane filter element 1. The water storage component 21 is connected in series on the first reflux branch 2. The reflux module also includes a control component. The control component can selectively conduct the first reflux branch and / or the second reflux branch. The detection component is communicatively connected to the control component.

[0088] By configuring the control components to selectively conduct the first return branch 2 and / or the second return branch 3, the return mode can be easily switched according to different usage scenarios or needs. The water at the pure water end of the reverse osmosis membrane filter element 1 can be selectively returned via the first return branch 2 or via the second return branch 3, or returned via both the first return branch 2 and the second branch to the inlet end of the reverse osmosis membrane filter element 1, thus meeting the application needs of users in different usage scenarios.

[0089] Specifically, when a high desalination rate of the first cup of water or a long service life of the reverse osmosis membrane filter element 1 is required, the second return branch 3 can be opened first, followed by the first return branch 2. That is, the pure water produced by the reverse osmosis membrane filter element 1 is used to rinse and dilute the concentrated water in front of the membrane, and then the pure water in the water storage component 21 is used to rinse the reverse osmosis membrane filter element 1, replacing the raw water with a higher TDS value in front of the membrane. This allows the reverse osmosis membrane filter element 1 to be immersed in pure water with a lower TDS value, resulting in a higher desalination rate of the first cup of water and extending the service life of the reverse osmosis membrane filter element 1.

[0090] When there is no requirement for a high desalination rate of the first cup of water or a long service life of the reverse osmosis membrane filter cartridge 1, only the first return branch 2 or the second return branch 3 can be opened for return, thereby saving pure water consumption and return time.

[0091] It should be noted that in order to allow the water in the water storage component 21 to drain smoothly, a vent is usually provided on the top of the water storage component 21. However, during the actual installation of the water purifier, due to the limited installation space, the water purifier needs to be installed upside down. At this time, the first return branch 2 cannot be used, so it can be switched to return through the second return branch 3 to avoid the return mode failing due to the change in the installation angle of the water purifier.

[0092] It should be noted that in practical applications, when the water system is in reflux mode, the control component can connect the pure water end of the reverse osmosis membrane filter element 1 to the inlet end of the reverse osmosis membrane filter element 1 only through the first reflux branch 2; alternatively, the control component can connect the pure water end of the reverse osmosis membrane filter element 1 to the inlet end of the reverse osmosis membrane filter element 1 only through the second reflux branch 3; or alternatively, the control component can connect the pure water end of the reverse osmosis membrane filter element 1 to the inlet end of the reverse osmosis membrane filter element 1 simultaneously through both the first reflux branch 2 and the second reflux branch 3. Alternatively, the control component can first connect the pure water end of the reverse osmosis membrane filter element 1 to the inlet end of the reverse osmosis membrane filter element 1 through the first return branch 2, and then connect the pure water end of the reverse osmosis membrane filter element 1 to the inlet end of the reverse osmosis membrane filter element 1 through the second return branch 3, etc. Such adjustments and changes to the specific connection method of the control component connecting the pure water end of the reverse osmosis membrane filter element 1 to the inlet end of the reverse osmosis membrane filter element 1 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0093] It should also be noted that in practical applications, this utility model does not impose any restrictions on the specific type of control components, as long as the pure water end of the reverse osmosis membrane filter element 1 can be selectively connected to the inlet end of the reverse osmosis membrane filter element 1 through the first return branch 2 and / or the second return branch 3, so that the water at the pure water end of the reverse osmosis membrane filter element 1 flows back into the reverse osmosis membrane filter element 1.

[0094] The control component of this utility model will be described below with reference to the following four embodiments.

[0095] Example 3:

[0096] like Figure 2 As shown, the control components include a water supply valve 43 and a first return valve 41 installed on the first return branch 2, and a second return valve 42 installed on the second return branch 3. The water supply valve 43 is installed between the water inlet end and the inlet 211 of the first return branch 2, and the first return valve 41 is installed between the water outlet end and the outlet 212 of the first return branch 2.

[0097] With this setup, when the water system is in water production mode, the pure water from the pure water end of the reverse osmosis membrane filter element 1 can flow into the water storage component 21 through the inlet 211 by opening the water supply valve 43. When the water system is in reflux mode, by controlling the first reflux valve 41 and the second reflux valve 42, the pure water from the pure water end of the reverse osmosis membrane filter element 1 can be selectively refluxed back into the reverse osmosis membrane filter element 1 through the first reflux branch 2 or the second reflux branch 3, so that the reverse osmosis membrane filter element 1 is immersed in pure water.

[0098] It should be noted that, in practical applications, those skilled in the art can configure the first return valve 41, the second return valve 42, and the water supply valve 43 as solenoid valves, or they can configure the first return valve 41, the second return valve 42, and the water supply valve 43 as manual valves, or they can configure a portion of the first return valve 41, the second return valve 42, and the water supply valve 43 as solenoid valves and another portion of the first return valve 41, the second return valve 42, and the water supply valve 43 as manual valves, etc. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should all be included within the protection scope of this utility model.

[0099] Preferably, the first reflux valve 41, the second reflux valve 42, and the water supply valve 43 are all solenoid valves.

[0100] Example 4:

[0101] like Figure 3 As shown, the control component includes a first reversing valve 44 and a water supply valve 43. The outlet 212 of the water storage component 21 is connected to the first interface of the first reversing valve 44. The outlet of the second return branch 3 is connected to the second interface of the first reversing valve 44. The third interface of the first reversing valve 44 is connected to the inlet of the reverse osmosis membrane filter element 1. The water supply valve 43 is located between the inlet of the first return branch 2 and the inlet 211. The third interface of the first reversing valve 44 can selectively connect to the first interface or the second interface.

[0102] With this setup, when the water system is in water production mode, opening the water supply valve 43 allows water from the pure water end of the reverse osmosis membrane filter element 1 to flow into the water storage component 21 through the inlet 211. When the water system is in reflux mode, connecting the first and third ports of the first reversing valve 44 allows the pure water in the water storage component 21 to flow back to the inlet of the reverse osmosis membrane filter element 1. Connecting the second and third ports of the first reversing valve 44 allows the pure water from the pure water end of the reverse osmosis membrane filter element 1 to flow back to the inlet of the reverse osmosis membrane filter element 1 through the second reflux branch 3, thus conveniently switching the reflux path.

[0103] Example 5:

[0104] like Figure 4 As shown, the control component includes a first reflux valve 41 and a second reversing valve 45. The first reflux valve 41 is located between the outlet end and the outlet 212 of the first reflux branch 2. The first port of the second reversing valve 45 is connected to the inlet 211 of the water storage component 21. The second port of the second reversing valve 45 is connected to the inlet end of the second reflux branch 3. The third port of the second reversing valve 45 is connected to the pure water end of the reverse osmosis membrane filter element 1. The third port of the second reversing valve 45 can selectively connect to the first port or the second port.

[0105] With this setup, when the water system is in water production mode, the third port of the second reversing valve 45 is connected to the first port, allowing pure water from the pure water end of the reverse osmosis membrane filter element 1 to flow into the water storage component 21 via inlet 211. When the water system is in reflux mode, the first reflux valve 41 is opened, allowing pure water in the water storage component 21 to flow back to the inlet of the reverse osmosis membrane filter element 1. The first reflux valve 41 is closed, and the third port of the second reversing valve 45 is connected to the second port, allowing pure water from the pure water end of the reverse osmosis membrane filter element 1 to flow back to the inlet of the reverse osmosis membrane filter element 1 via the second reflux branch 3.

[0106] Example 6:

[0107] like Figure 5 As shown, the control component includes a first reversing valve 44 and a second reversing valve 45, wherein: the outlet 212 of the water storage component 21 is connected to the first interface of the first reversing valve 44, the outlet of the second return branch 3 is connected to the second interface of the first reversing valve 44, the third interface of the first reversing valve 44 is connected to the inlet of the reverse osmosis membrane filter element 1, and the third interface of the first reversing valve 44 can selectively connect to the first interface or the second interface.

[0108] The first port of the second reversing valve 45 is connected to the inlet 211 of the water storage component 21, the second port of the second reversing valve 45 is connected to the inlet end of the second return branch 3, the third port of the second reversing valve 45 is connected to the pure water end of the reverse osmosis membrane filter element 1, and the third port of the second reversing valve 45 can selectively connect to the first port or the second port.

[0109] With this setup, when the water system is in water production mode, the third port of the second reversing valve 45 is connected to the first port, allowing pure water from the pure water end of the reverse osmosis membrane filter element 1 to flow into the water storage component 21 via inlet 211. When the water system is in reflux mode, the first port of the first reversing valve 44 is connected to the third port, allowing pure water in the water storage component 21 to flow back to the inlet of the reverse osmosis membrane filter element 1. The second port of the first reversing valve 44 is connected to the third port, allowing pure water from the pure water end of the reverse osmosis membrane filter element 1 to flow back to the inlet of the reverse osmosis membrane filter element 1 via the first reflux branch 2.

[0110] It should be noted that although the present invention uses the above four embodiments as examples to introduce the control component, this is not restrictive. Any other possible forms do not depart from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0111] Preferably, the water system further includes a flow control component, which is configured to adjust the ratio between the flow rate of pure water flowing into the reverse osmosis membrane filter element 1 via the return pipe and the flow rate of raw water flowing into the reverse osmosis membrane filter element 1 via the main inlet pipe 13.

[0112] By setting up a flow control component, the ratio between the pure water flow rate returning to the inlet of the reverse osmosis membrane filter element 1 via the return pipeline and the raw water flow rate flowing into the inlet of the reverse osmosis membrane filter element 1 via the main inlet pipeline 13 can be adjusted. This allows for adjustment of the ratio of pure water flow rate to raw water flow rate based on the water quality in the main inlet pipeline 13. When the water quality in the main inlet pipeline 13 is good, the raw water flow rate can be appropriately increased, thus saving more pure water. When the water quality in the main inlet pipeline 13 is poor, the raw water flow rate can be appropriately reduced to avoid affecting the rinsing effect on the reverse osmosis membrane filter element 1 due to the poor quality of the mixed water. This balances the pure water consumption and the rinsing effect on the reverse osmosis membrane filter element 1 under mixed water return operation.

[0113] It should be noted that in practical applications, this utility model does not impose any restrictions on the specific type of flow control component, as long as it can adjust the ratio between the flow rate of pure water flowing into the reverse osmosis membrane filter element 1 through the return pipeline and the flow rate of raw water flowing into the reverse osmosis membrane filter element 1 through the main inlet pipeline 13.

[0114] In one specific embodiment, such as Figure 1As shown, the flow control component of this utility model includes a first flow control component 71 and a second flow control component 72. The first flow control component 71 is disposed on the return pipeline and is used to regulate the flow rate of pure water flowing into the reverse osmosis membrane filter element 1 through the return pipeline. The second flow control component 72 is disposed on the main inlet pipeline 13 and is used to regulate the flow rate of raw water flowing into the reverse osmosis membrane filter element 1 through the main inlet pipeline 13.

[0115] It should be noted that, in practical applications, those skilled in the art can set the first flow control component 71 on the second return branch 3, or the outlet end of the first return branch 2 and the outlet end of the second return branch 3 can be connected to the main water inlet 13 through the manifold 23, and the first flow control component 71 can be set on the manifold 23, etc. Such adjustments and changes to the specific setting position of the first flow control component 71 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0116] Preferably, the outlet end of the first return branch 2 and the outlet end of the second return branch 3 intersect and are connected to the main water inlet 13 through the manifold 23, and the first flow control component 71 is installed on the manifold 23.

[0117] In another specific embodiment, such as Figure 6 As shown, the flow control component of this utility model includes a proportional regulating valve 73. The first inlet of the proportional regulating valve 73 is connected to the outlet of the return pipeline, the second inlet of the proportional regulating valve 73 is connected to the outlet of the main inlet pipeline 13, and the outlet of the proportional regulating valve 73 is connected to the inlet of the reverse osmosis membrane filter element 1.

[0118] It should be noted that those skilled in the art can adjust the ratio between the flow rate of pure water flowing into the reverse osmosis membrane filter element 1 through the reflux pipe and the flow rate of raw water flowing into the reverse osmosis membrane filter element 1 through the main inlet pipe 13 based on experience or experimentation. Alternatively, the ratio can be adjusted based on the water quality information in the main inlet pipe 13. Such flexible adjustments and changes do not deviate from the principles and scope of this utility model and should be included within the protection scope of this utility model.

[0119] Preferably, such as Figure 1 and Figure 2 As shown, the water system also includes an inlet water quality detection component, which is used to detect water quality information in the main inlet channel 13. The inlet water quality detection component is communicatively connected to the flow control component so as to adjust the flow control component according to the water quality information in the main inlet channel 13.

[0120] By setting the influent water quality detection component to communicate with the flow control component, the signal can be transmitted to the flow control component according to the influent water quality. This facilitates the automatic adjustment of the ratio between the pure water flow rate flowing into the reverse osmosis membrane filter element 1 through the return pipeline and the raw water flow rate flowing into the reverse osmosis membrane filter element 1 through the main influent pipeline 13, thereby further improving the user experience.

[0121] It should be noted that, in practical applications, those skilled in the art can set the inlet water quality testing component as a TDS value testing component, or as a hardness meter, or as any other possible form, etc. Such adjustments and changes to the specific setting type of the inlet water quality testing component do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0122] Preferably, the influent water quality detection component is a first TDS value detection component 112.

[0123] It should be noted that the inlet water quality detection component can be set on the main inlet water channel 13, or it can be set at the upstream end of the main inlet water channel 13. Such adjustments and changes to the specific setting position of the inlet water quality detection component do not deviate from the principle and scope of this utility model, and should be included within the protection scope of this utility model.

[0124] For example, the first TDS value detection component 112 is disposed on the main water inlet 13.

[0125] Preferably, such as Figure 11 and Figure 12 As shown, the outlet end of the return pipeline is connected to the upstream end of the booster pump 61. The return mode includes pure water circulation operation. Under pure water circulation operation, the booster pump 61 can also drive at least part of the pure water in the water storage component 21 to enter from the inlet end of the reverse osmosis membrane filter element 1 and return from its pure water end to its inlet end or back to the water storage component 21 to circulate and flush the reverse osmosis membrane filter element 1.

[0126] With this configuration, at least a portion of the pure water in the water storage component 21 can enter from the inlet end of the reverse osmosis membrane filter element 1 and return from its pure water end to the inlet end or back into the water storage component 21. This allows the reverse osmosis membrane filter element 1 to use the pure water in the water storage component 21 to produce pure water. On the one hand, it can produce pure water with a lower TDS value, thereby obtaining pure water with a higher desalination rate. This allows the reverse osmosis membrane filter element 1 to be immersed in pure water with a higher desalination rate, thus more effectively solving the problem of increased TDS value in the "first cup of water". On the other hand, it can recycle the water in the water storage component 21 to rinse the reverse osmosis membrane filter element 1, thereby achieving a larger amount of pure water rinsing with the limited volume of the water storage component 21, which helps to reduce the volume of the water storage component 21.

[0127] It should be noted that this utility model does not limit the specific method of circulating and rinsing the reverse osmosis membrane filter element 1 with at least a portion of the pure water in the water storage component 21.

[0128] In one specific embodiment, such as Figure 11 As shown, the return pipeline includes a first return branch 2. The inlet end of the first return branch 2 can be connected to the pure water end of the reverse osmosis membrane filter element 1. The outlet end of the first return branch 2 is connected to the inlet end of the booster pump 61. The water storage component 21 is connected in series on the first return branch 2. Under pure water circulation operation, the inlet and outlet ends of the booster pump 61, the inlet and pure water ends of the reverse osmosis membrane filter element 1, and the inlet and outlet ends of the first return branch 2 are connected in sequence to form a circulation loop.

[0129] With this setup, the pure water in the water storage component 21 first flows to the inlet end of the reverse osmosis membrane filter element 1, and then is filtered by the reverse osmosis membrane filter element 1. The pure water produced after filtration then flows back to the inlet end of the reverse osmosis membrane filter element 1 through the first return branch 2.

[0130] In another specific embodiment, such as Figure 12 As shown, the return pipeline includes a second return branch 3. The inlet end of the second return branch 3 can be connected to the pure water end of the reverse osmosis membrane filter element 1, and the outlet end of the second return branch 3 is connected to the inlet end of the booster pump 61. Under pure water circulation operation, the inlet and outlet ends of the booster pump 61, the inlet and pure water ends of the reverse osmosis membrane filter element 1, and the inlet and outlet ends of the second return branch 3 are connected in sequence to form a circulation loop. The outlet 212 of the water storage component 21 is connected to the circulation loop.

[0131] With this setup, the pure water in the water storage component 21 first flows to the inlet end of the reverse osmosis membrane filter element 1, and then is filtered by the reverse osmosis membrane filter element 1. The pure water produced after filtration then flows back to the inlet end of the reverse osmosis membrane filter element 1 through the second return branch 3.

[0132] It should be noted that those skilled in the art can configure the outlet ends of both the first return branch 2 and the second return branch 3 to be connected to the main inlet branch 13, so that the first return branch 2 and the second return branch 3 are connected to the inlet end of the reverse osmosis membrane filter element 1. Alternatively, the reverse osmosis membrane filter element 1 can be configured to have multiple inlets, with the outlet ends of the main inlet branch 13, the first return branch 2, and the second return branch 3 respectively connected to the inlet of the reverse osmosis membrane filter element 1. Or, one of the first return branch 2 and the second return branch 3 can be connected to the main inlet branch 13, and the other can be directly connected to the inlet of the reverse osmosis membrane filter element 1, etc. Such adjustments and changes to the specific connection methods of the first return branch 2 and the second return branch 3 to the inlet end of the reverse osmosis membrane filter element 1 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0133] Preferably, such as Figures 1 to 6 As shown, the outlets of the first return branch 2 and the second return branch 3 are connected to the main inlet water line 13. The water system also includes a first check valve 22, which is installed on the first return branch 2 and is used to prevent water in the main inlet water line 13 from flowing back into the water storage component 21.

[0134] Preferably, such as Figures 1 to 6 As shown, the water system also includes a second check valve 31, which is installed on the second return branch 3 and is used to prevent water in the main inlet 13 from flowing back to the pure water end of the reverse osmosis membrane filter element 1.

[0135] It should be noted that, in practical applications, those skilled in the art can use the booster pump 61 of the water purifier to drive the water from the pure water end of the reverse osmosis membrane filter element 1 to be transported to the reverse osmosis membrane filter element 1 through the first return branch 2 and the second return branch 3. Alternatively, the outlet ends of the first return branch 2 and the second return branch 3 can be connected together and connected to the inlet end of the reverse osmosis membrane filter element 1 through the manifold 23. A self-priming pump 62 can be installed on the manifold 23 to drive the water from the pure water end of the reverse osmosis membrane filter element 1 to be transported to the reverse osmosis membrane filter element 1 through the first return branch 2 and the second return branch 3. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0136] The following two examples illustrate this concept.

[0137] Example 7:

[0138] like Figure 6As shown, the booster pump 61 of the water purification equipment is installed on the main water inlet 13. The outlet of the first return branch 2 and the outlet of the second return branch 3 are both connected to the inlet of the booster pump 61. The booster pump 61 can transport the water in the first return branch 2 and / or the second return branch 3 to the reverse osmosis membrane filter element 1.

[0139] With this setup, the pure water is driven by the built-in booster pump 61 of the water purifier, eliminating the need for a separate water pump for recirculation and thus reducing the cost of the water purifier.

[0140] It should be noted that in practical applications, the booster pump 61 can be set to have only one working mode, that is, the working pressure is the same in both water production mode and reflux mode. Alternatively, the booster pump 61 can be set to have at least a first working mode and a second working mode. When the water system is in water production mode, mixed water reflux operation, or pure water circulation operation, the booster pump 61 is in the first working mode. When the water system is in pure water reflux operation, the booster pump 61 is in the second working mode. The working pressure of the first working mode is greater than that of the second working mode. Such adjustments and changes to the specific working mode of the booster pump 61 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0141] Preferably, the booster pump 61 has at least a first working mode and a second working mode. When the water system is in water production mode, mixed water recirculation operation, or pure water circulation operation, the booster pump 61 is in the first working mode. When the water system is in pure water recirculation operation, the booster pump 61 is in the second working mode. The working pressure of the first working mode is greater than the working pressure of the second working mode.

[0142] With this configuration, when the water system is in water production mode, mixed water recirculation operation, or pure water circulation operation, the booster pump 61 can pressurize the water, overcome osmotic pressure, and force water molecules to pass through the reverse osmosis membrane to produce pure water. When the water system is in pure water recirculation operation, the working pressure of the booster pump 61 can be relatively low, so that the pure water can gently wet the reverse osmosis membrane filter element 1, replace and dilute the dirt on the membrane surface. At the same time, it can also avoid the high-pressure recirculation causing some of the recirculated pure water to be forced through the membrane and become "waste water", which would reduce the effective amount of pure water used for soaking. In addition, low-pressure recirculation can also reduce the mechanical stress and pressure shock of the membrane, improve the service life of the reverse osmosis membrane filter element 1, and reduce the wear of the booster pump 61, extending the service life of the booster pump 61.

[0143] It should be noted that the booster pump 61 is not limited to having a first working mode and a second working mode. For example, the booster pump 61 can also be set to more working modes. Such adjustments and changes to the number of specific working modes of the booster pump 61 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0144] Example 8:

[0145] like Figures 1 to 5 As shown, the outlet of the first return branch 2 and the outlet of the second return branch 3 converge and are connected to the inlet of the reverse osmosis membrane filter element 1 through the manifold 23. The water system also includes a self-priming pump 62, which is installed on the manifold 23 and is used to transport water in the first return branch 2 and / or the second return branch 3 to the reverse osmosis membrane filter element 1.

[0146] With this setup, compared to the method of pure water recirculation via booster pump 61, the method of achieving pure water recirculation by setting up self-priming pump 62 has two advantages. First, the self-priming function of self-priming pump 62 can recirculate the pure water in the water storage component 21 or the pure water end of the reverse osmosis membrane filter element 1 back to the inlet end of the reverse osmosis membrane filter element 1, avoiding excessive pressure that would cause some pure water to permeate to the pure water end of the reverse osmosis membrane filter element 1, saving recirculation water, and thus further reducing the volume of water storage component 21. Second, it can avoid the frequent operation of booster pump 61, which would affect its service life and reduce the cost of replacing booster pump 61.

[0147] It should be noted that the method is not limited to installing a self-priming pump 62 on the manifold 23 to transport water from the first return branch 2 and / or the second return branch 3 to the reverse osmosis membrane filter element 1. For example, self-priming pumps 62 can be installed on both the first return branch 2 and the second return branch 3. Alternatively, a self-priming pump 62 can be installed only on the first return branch 2 to transport pure water from the water storage component 21 to the reverse osmosis membrane filter element 1, and a booster pump 61 can be used to transport pure water from the pure water end of the reverse osmosis membrane filter element 1 to the reverse osmosis membrane filter element 1 via the second return branch 3. Of course, it is preferable to install a self-priming pump 62 on the manifold 23 to transport water from the first return branch 2 and / or the second return branch 3 to the reverse osmosis membrane filter element 1.

[0148] Preferably, such as Figures 1 to 6 As shown, the detection component also includes a low liquid level detection component 213, which is used to detect a preset low liquid level in the water storage component 21. The low liquid level detection component 213 is communicatively connected to the reflux module so that the reflux module can be selectively terminated from reflux mode based on the detection signal of the low liquid level detection component 213.

[0149] With this configuration, by installing a low liquid level detection component 213 inside the water storage component 21, it is possible to detect whether the liquid level in the water storage component 21 has reached a preset low liquid level. When the water level in the water storage component 21 is detected to have reached the preset low liquid level, a signal is transmitted to the self-priming pump 62 or the booster pump 61 to end the reflux mode, thus avoiding the dry running of the self-priming pump 62 or the booster pump 61 due to insufficient water in the water storage component 21.

[0150] It should be noted that the reflux mode is not limited to ending when the liquid level in the water storage component 21 reaches a preset low level. For example, the running time of the reflux mode can also be detected, and the reflux mode can end when the running time reaches a preset time. Alternatively, the TDS value at the wastewater end of the reverse osmosis membrane filter element 1 can be detected, and the reflux mode can end when the TDS value reaches a preset TDS value or the desalination rate reaches a preset desalination rate. Or, the reflux mode can end when any of the above methods are reached first, etc. Such adjustments and changes to the specific judgment method for ending the reflux mode do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model. Of course, preferably, the reflux mode ends when the liquid level in the water storage component 21 reaches a preset low level.

[0151] It should be noted that, in practical applications, those skilled in the art can configure the main inlet water line 13 to be directly connected to tap water, that is, tap water directly enters the reverse osmosis membrane filter element 1 through the main inlet water line 13 to prepare pure water. Alternatively, the main inlet water line 13 can be configured to be connected to a water storage container, that is, water in the water storage container enters the reverse osmosis membrane filter element 1 through the main inlet water line 13 to prepare pure water. Or, the main inlet water line 13 can be configured to be connected to the pre-filter unit 51, that is, water filtered by the pre-filter unit 51 enters the reverse osmosis membrane filter element 1 to prepare pure water, and so on. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should all be included within the protection scope of this utility model.

[0152] Preferably, such as Figures 1 to 6 As shown, the water system also includes a pre-filter unit 51. The inlet of the pre-filter unit 51 is connected to the water source, and the outlet of the pre-filter unit 51 is connected to the inlet of the reverse osmosis membrane filter element 1 through the main inlet channel 13.

[0153] By setting up a pre-filter unit 51, water filtered by the pre-filter unit 51 can be transported into the reverse osmosis membrane filter element 1 to prepare pure water, which can improve the water quality of the water entering the reverse osmosis membrane filter element 1 and avoid affecting the service life of the reverse osmosis membrane filter element 1 due to poor water quality.

[0154] It should be noted that this utility model does not impose any limitation on the connection method between the water inlet of the pre-filter unit 51 and the water source. For example, the water inlet of the pre-filter unit 51 can be connected to tap water through the water inlet pipe 11, or the water inlet of the pre-filter unit 51 can be connected to the original water storage component 21. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0155] Preferably, such as Figures 1 to 6 As shown, the water system also includes an inlet pipe 11 and an inlet valve 111. The inlet end of the pre-filter unit 51 is connected to the inlet pipe 11. The inlet valve 111 is installed on the inlet pipe 11 and is used to control the opening and closing of the inlet pipe 11.

[0156] Preferably, the water system further includes a first TDS value detection component 112, which is disposed on the water inlet pipe 11 and is used to detect the water quality in the water inlet pipe 11.

[0157] Preferably, the water system further includes a first flow meter 113, which is installed on the inlet pipe 11 and used to detect the inlet flow rate in the inlet pipe 11.

[0158] Preferably, such as Figures 1 to 6 As shown, the water purification device has a purified water outlet interface 122, and the water system also includes a purified water outlet pipe 12 and a purified water outlet valve 121. The outlet end of the pre-filter unit 51 can also be connected to the purified water outlet interface 122 through the purified water outlet pipe 12. The purified water outlet valve 121 is installed on the purified water outlet pipe 12 and is used to control the opening and closing of the purified water outlet pipe 12.

[0159] This setup enables the water purifier to provide purified water, allowing users to use purified water instead of pure water for daily tasks such as washing fruits and vegetables, thus further extending the service life of the reverse osmosis membrane filter element 1.

[0160] Preferably, such as Figures 1 to 6 As shown, the water system also includes a post-filtration unit 52. The pure water end of the reverse osmosis membrane filter element 1 is connected to the inlet end of the post-filtration unit 52, and the inlet ends of the first return branch 2 and the second return branch 3 are both connected to the outlet end of the post-filtration unit 52.

[0161] By setting up a post-filtration unit 52, the pure water filtered by the reverse osmosis membrane filter cartridge 1 can be post-treated to remove residual chlorine, improve taste, and further enhance the quality of the pure water.

[0162] Preferably, such as Figures 1 to 6As shown, the pure water end of the reverse osmosis membrane filter element 1 is connected to the inlet end of the post-filtration unit 52 through the pure water pipe 53. A third one-way valve 531 is provided on the pure water pipe 53. The third one-way valve 531 can prevent the water in the post-filtration unit 52 from flowing back to the inlet end of the reverse osmosis membrane filter element 1.

[0163] More preferably, a second TDS value detection component 532 is also provided on the pure water pipe 53, which is used to detect the TDS value of the pure water in the pure water pipe 53.

[0164] It should be noted that a pre-filter and a post-filter can be provided, with the pre-filter unit 51 located inside the pre-filter and the post-filter unit 52 located inside the post-filter. Alternatively, a composite filter 5 can be provided, with both the pre-filter unit 51 and the post-filter unit 52 located inside the composite filter 5, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of this utility model and should be included within the protection scope of this utility model.

[0165] Preferably, such as Figures 1 to 6 As shown, the water system includes a composite filter element 5, and both the pre-filter unit 51 and the post-filter unit 52 are installed inside the composite filter element 5.

[0166] Preferably, such as Figures 1 to 6 As shown, the water system also includes an outlet component and a water replenishment module. The pure water end of the reverse osmosis membrane filter element 1 is connected to the outlet component through a pure water output pipe 81 so that pure water can be output from the pure water end of the reverse osmosis membrane filter element 1. The water replenishment module is configured to enable the pure water end of the reverse osmosis membrane filter element 1 to be connected to the inlet of the water storage component 21 so as to replenish water to the water storage component 21. The outlet component and the water replenishment module are communicatively connected so as to selectively control the opening and closing of the water replenishment module according to the water output status of the outlet component.

[0167] With this setup, the opening and closing of the water replenishment module can be controlled according to the water output status of the water output component, realizing intelligent control of water replenishment and water intake. On the one hand, when the water output component stops outputting water, a signal is transmitted to the water replenishment module, so that the pure water end of the reverse osmosis membrane filter element 1 is connected to the inlet 211 of the water storage component 21, thereby replenishing the water storage component 21 in a timely manner and realizing automatic water replenishment of the water storage component 21. On the other hand, when the water output component outputs water or outputs water again, a signal is transmitted to the water replenishment module, so that the pure water end of the reverse osmosis membrane filter element 1 is cut off from the inlet 211 of the water storage component 21. The water filtered by the reverse osmosis membrane filter element 1 flows out of the water output component through the pure water output pipe 81, avoiding the impact on the user's normal water use due to water replenishment.

[0168] It should be noted that when the user finishes taking water, the water replenishment module is activated to replenish the water storage component 21. During the water replenishment process, if the user takes water again, a signal is sent to the water replenishment module to stop replenishing the water storage component 21, thus avoiding affecting the user's normal water use and greatly improving the user experience.

[0169] This application can intelligently and automatically replenish the water storage component 21 according to the water output status of the water output component. When the user stops taking water, the water replenishment process is automatically and timely started to reserve sufficient pure water for the subsequent reflux mode, thereby ensuring the effective operation of the reflux mode. This allows pure water to flow back into the reverse osmosis membrane filter element 1, squeezing out or diluting the water with a high TDS value in the reverse osmosis membrane filter element 1, so that the reverse osmosis membrane filter element 1 is immersed in pure water with a low TDS value, avoiding the problem of the first cup of water having an excessive TDS value. At the same time, it avoids scaling of the reverse osmosis membrane filter element 1 and extends the service life of the reverse osmosis membrane filter element 1.

[0170] It should be noted that, in practical applications, this utility model does not impose any limitations on the specific type of the water outlet component. For example, the water outlet component can be configured as a combination of a mechanical water outlet component and a high-pressure switch, or it can be configured as a combination of an electrically controlled water outlet component and a pure water outlet valve, or it can be configured as any other possible form, etc. Such adjustments and changes to the specific type of the water outlet component do not deviate from the principles and scope of this utility model and should all be included within the protection scope of this utility model.

[0171] In one specific embodiment, such as Figures 1 to 5 As shown, the water outlet component includes a mechanical faucet 821 and a high-pressure switch 831. The high-pressure switch 831 is installed on the pure water output pipe 81 and is used to detect the water pressure in the pure water output pipe 81 to provide feedback on the water outlet status of the water outlet component. The high-pressure switch 831 is communicatively connected to the water replenishment module.

[0172] When the user closes the mechanical faucet 821 after taking water, pure water cannot flow out of the mechanical faucet 821. As a result, the water pressure in the pure water output pipe 81 increases significantly. When the high-pressure switch 831 detects that the water pressure in the pure water output pipe 81 has reached the preset high water pressure, it transmits a signal to the water replenishment module. The water replenishment module is turned on, allowing pure water from the pure water end of the reverse osmosis membrane filter 1 to flow into the water storage component 21 to replenish the water storage component 21.

[0173] During the water replenishment process, when the user turns on the mechanical faucet 821 again, pure water flows out from the mechanical faucet 821, and the water pressure in the pure water output pipe 81 drops significantly. When the high-pressure switch 831 detects that the water pressure in the pure water output pipe 81 has reached the preset low water pressure, it transmits a signal to the water replenishment module, which closes the water replenishment module, thus cutting off the pure water end of the reverse osmosis membrane filter 1 from the inlet 211 of the water storage component 21. The pure water filtered by the reverse osmosis membrane filter 1 flows out from the mechanical faucet 821 through the pure water output pipe 81 for the user to take water, thus avoiding the user's normal water intake being affected by water replenishment.

[0174] In another specific embodiment, such as Figure 6 As shown, the water outlet assembly includes an electrically controlled faucet 822 and a pure water outlet valve 832. The pure water outlet valve 832 is installed on the pure water output pipe 81 and is used to control the opening and closing of the pure water output pipe 81. The electrically controlled faucet 822 is communicatively connected to the pure water outlet valve 832 so that the pure water output pipe 81 is cut off when the electrically controlled faucet 822 is closed. The electrically controlled faucet 822 and / or the pure water outlet valve 832 are communicatively connected to the water replenishment module.

[0175] When the user finishes taking water and closes the electronically controlled faucet 822, a signal is transmitted to the pure water outlet valve 832, causing the pure water outlet valve 832 to close and cutting off the pure water output pipe 81. The electronically controlled faucet 822 and / or the pure water outlet valve 832 then transmit a signal to the water replenishment module, which opens the water replenishment module, allowing pure water from the pure water end of the reverse osmosis membrane filter element 1 to flow into the water storage component 21 to replenish the water storage component 21.

[0176] During the water replenishment process, when the system detects that the user has turned on the electronically controlled faucet 822 again, a signal is transmitted to the pure water outlet valve 832. The pure water outlet valve 832 opens, and pure water flows out from the outlet component. The electronically controlled faucet 822 and / or the pure water outlet valve 832 transmit a signal to the water replenishment module, and the water replenishment module closes, thus cutting off the pure water end of the reverse osmosis membrane filter element 1 from the inlet 211 of the water storage component 21. The pure water filtered by the reverse osmosis membrane filter element 1 flows out from the outlet component through the pure water output pipe 81 for the user to take water, thus avoiding the user's normal water intake being affected by water replenishment.

[0177] It should be noted that those skilled in the art can configure only the electric faucet 822 to communicate with the water replenishment module, or only the pure water outlet valve 832 to communicate with the water replenishment module, or both the electric faucet 822 and the pure water outlet valve 832 to communicate with the water replenishment module, etc. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0178] For example, the pure water outlet valve 832 is communicatively connected to the water replenishment module.

[0179] It should be noted that this utility model does not limit the specific type of water replenishment module, as long as it can make the pure water end of the reverse osmosis membrane filter element 1 connected to the inlet of the water storage component 21 to replenish the water storage component 21.

[0180] In one specific embodiment, such as Figures 1 to 7 As shown, the water replenishment module includes a water replenishment valve 43, which is located on the first return branch 2 and upstream of the water storage component 21. The water outlet component is communicatively connected to the water replenishment valve 43.

[0181] When the water system is in the user's water intake phase, the water supply valve 43 remains closed. The pure water filtered by the reverse osmosis membrane filter element 1 flows through the pure water output pipe 81 to the water outlet component and then flows out from the water outlet component for the user to take water. When the user finishes taking water, the water outlet component stops discharging water and sends a signal to the water supply valve 43. The water supply valve 43 opens to connect the pure water end of the reverse osmosis membrane filter element 1 with the inlet 211 of the water storage component 21, so that the pure water filtered by the reverse osmosis membrane filter element 1 flows into the water storage component 21 to replenish the water storage component 21. During the water replenishment process, when the user takes water again, that is, when the water outlet component discharging water, a signal is sent to the water supply valve 43. The water supply valve 43 closes to cut off the pure water end of the reverse osmosis membrane filter element 1 from the inlet 211 of the water storage component 21, so that the pure water filtered by the reverse osmosis membrane filter element 1 flows out from the water outlet component.

[0182] In another specific embodiment, the water replenishment module includes a third reversing valve (not shown in the figure). The first port of the third reversing valve is connected to the pure water end of the reverse osmosis membrane filter element 1. The second port of the third reversing valve is connected to the water outlet component through the pure water output pipe 81. The third port of the third reversing valve is connected to the inlet 211 of the water storage component 21. The first port of the third reversing valve can selectively connect to the second port or the third port. The water outlet component is communicatively connected to the third reversing valve.

[0183] When the water system is in the user's water intake phase, the first and second ports of the third reversing valve are connected. The pure water filtered by the reverse osmosis membrane filter 1 flows out through the pure water output pipe 81 and from the water outlet component for the user to take water. When the user finishes taking water, the water outlet component stops discharging water and transmits a signal to the third reversing valve, connecting the first and third ports of the third reversing valve. This connects the pure water end of the reverse osmosis membrane filter 1 with the inlet 211 of the water storage component 21, allowing the pure water filtered by the reverse osmosis membrane filter 1 to flow into the water storage component 21 to replenish the water storage component 21. During the replenishment process, when the user takes water again, i.e., when the water outlet component discharges water, a signal is transmitted to the third reversing valve, connecting the first and second ports. The pure water filtered by the reverse osmosis membrane filter 1 cannot flow into the water storage component 21 and flows out from the water outlet component.

[0184] Preferably, a fourth one-way valve 811 is also provided on the pure water output pipe 81, which can prevent water from flowing back into the water outlet assembly.

[0185] Preferably, such as Figures 1 to 6 As shown, the water system also includes a pure water interface 841. The outlet of the post-filter unit 52 is also connected to the pure water interface 841 through a pure water supply pipe 84. The pure water interface 841 is used to supply water to external drinking water equipment.

[0186] For example, the pure water interface 841 is adapted to the water inlet of the water dispenser, and the pure water interface 841 is used to supply water to the water dispenser.

[0187] It should be noted that the pure water supply pipe 84 can be directly connected to the outlet of the post-filter unit 52, or the pure water supply pipe 84 can be connected to the pure water output pipe 81, etc. Such adjustments and changes to the specific connection position of the pure water supply pipe 84 do not deviate from the principle and scope of this utility model, and should be included within the protection scope of this utility model.

[0188] Preferably, the pure water supply pipe 84 is connected to the pure water output pipe 81.

[0189] Preferably, a second flow meter 812 is also provided on the pure water output pipe 81, which is used to detect the pure water flow rate in the pure water output pipe 81.

[0190] Preferably, such as Figures 1 to 6 As shown, the water system also includes a wastewater pipe 15 and a wastewater valve 151. One end of the wastewater pipe 15 is connected to the wastewater end of the reverse osmosis membrane filter element 1, and the other end of the wastewater pipe 15 is connected to the wastewater outlet 150. The wastewater valve 151 is installed on the wastewater pipe 15.

[0191] More preferably, the water system further includes a third TDS value detection component 152, which is disposed on the wastewater pipe 15 and is used to detect the TDS value of the wastewater in the wastewater pipe 15.

[0192] More preferably, the water system also includes a stop valve 153, which is installed on the wastewater pipe 15.

[0193] This utility model also provides a water purification device, which includes a water circuit system for the water purification device.

[0194] It should be noted that, in practical applications, those skilled in the art can configure the water purification device as a countertop water purifier, or as an under-sink water purifier, or as a beverage machine such as a coffee machine, milk maker, or tea maker, etc. Such adjustments and changes to the specific configuration of the water purification device do not deviate from the principles and scope of this utility model and should all be included within the protection scope of this utility model.

[0195] Preferably, the water purifier is a countertop water purifier.

[0196] The following situations are combined with... Figures 7 to 12 This article will describe in detail the working mode of the water purification equipment of this utility model.

[0197] Scenario 1, Water Production Mode:

[0198] (1) User water intake: such as Figure 7 As shown, close the water supply valve 43, the first return valve 41 and the second return valve 42, and adjust the booster pump 61 to the first working mode. Open the water inlet valve 111 and the mechanical faucet 821. Tap water enters the pre-filter unit 51 for preliminary filtration. The filtered water is then transported to the reverse osmosis membrane filter element 1 by the booster pump 61. The pure water filtered by the reverse osmosis membrane filter element 1 enters the post-filter unit 52 through the pure water pipe 53. After the taste is improved by the post-filter unit 52, it is then transported to the water outlet component through the pure water output pipe 81, or to the pure water interface 841 through the pure water supply pipe 84.

[0199] (2) Water replenishment for water storage component 21: such as Figure 8 As shown, when the user finishes taking water, the user closes the mechanical faucet. The high-pressure switch 831 detects the increase in water pressure in the pure water output pipe 81 and transmits the signal to the control component. The control component controls the pure water end of the reverse osmosis membrane filter 1 to connect with the inlet 211 of the water storage component 21, so that the water replenishment valve 43 opens. The pure water from the pure water end of the reverse osmosis membrane filter 1 flows into the water storage component 21 through the inlet 211 of the water storage component 21 to replenish the water storage component 21.

[0200] Alternatively, after the user finishes taking water, the user turns off the electric faucet and sends a signal to the pure water outlet valve 832. The pure water outlet valve 832 closes and sends a signal to the control component. The control component controls the pure water end of the reverse osmosis membrane filter 1 to connect with the inlet 211 of the water storage component 21, that is, opens the water replenishment valve 43. The pure water from the pure water end of the reverse osmosis membrane filter 1 flows into the water storage component 21 through the inlet 211 of the water storage component 21 to replenish the water storage component 21.

[0201] (3) Water storage component 21 stops replenishing water: The high liquid level detection component 214 or the overflow prevention liquid level detection component 215 in the water storage component 21 detects the water level in the water storage component 21. When the water level in the water storage component 21 reaches the preset first high liquid level, the signal is transmitted to the booster pump 61, so that the booster pump 61 ends the first working mode, the reverse osmosis membrane filter element 1 stops producing water, and at the same time, the signal is transmitted to the control component. The control component controls the pure water end of the reverse osmosis membrane filter element 1 to disconnect from the inlet 211 of the water storage component 21, that is, to close the water replenishment valve 43 and complete the water replenishment of the water storage component 21.

[0202] Alternatively, if the high liquid level detection component 214 fails, when the anti-overflow liquid level detection component 215 detects that the water level in the water storage component 21 has reached the preset second high liquid level, it will transmit a signal to the control component. The control component will control the pure water end of the reverse osmosis membrane filter element 1 to disconnect from the inlet 211 of the water storage component 21, that is, close the water supply valve 43 to complete the water supply to the water storage component 21.

[0203] Scenario 2: The second return branch 3 performs a mixed water return operation:

[0204] like Figure 9 As shown, keep the water supply valve 43 closed, open the water inlet valve 111 and start the booster pump 61 and adjust the booster pump 61 to the first working mode. Tap water enters the pre-filter unit 51 for preliminary filtration. The filtered water is transported to the reverse osmosis membrane filter element 1 under the action of the booster pump 61. The pure water filtered by the reverse osmosis membrane filter element 1 flows back from the first return branch 2 to the main water inlet 13 and mixes with the water in the main water inlet 13 before being transported to the reverse osmosis membrane filter element 1 for mixed water return, thereby reducing the TDS value of the water in the reverse osmosis membrane filter element 1.

[0205] Scenario 3: Pure water reflux operation is performed in the first reflux branch 2:

[0206] like Figure 10 As shown, after the second return branch 3 performs return, the first return branch 2 performs return. The water supply valve 43 is kept closed, the inlet valve 111 and the second return valve 42 are closed, and the first return valve 41 is opened. The booster pump 61 is adjusted to the second working mode or the self-priming pump 62 is started. The pure water in the water storage component 21 is transported to the reverse osmosis membrane filter element 1 through the first return branch 2 under the action of the booster pump 61 or the self-priming pump 62. The water in the reverse osmosis membrane filter element 1 is squeezed out and discharged through the wastewater pipe 15 until all the water in the reverse osmosis membrane filter element 1 is replaced with pure water with a lower TDS value. The reverse osmosis membrane filter element 1 is immersed in pure water with a lower TDS value, which fundamentally solves the problem of the high TDS value of the "first cup of water".

[0207] Scenario 4: Pure water circulation operation using the first return branch 2:

[0208] like Figure 11 As shown, after the second return branch 3 performs reflux, a second circulation reflux is performed. The inlet valve 111 and the second return valve 42 are closed, and the water supply valve 43 and the first return valve 41 are opened. The booster pump 61 is adjusted to the first working mode so that pure water can be used to produce water. The pure water in the water storage component 21 is pressurized by the booster pump 61 and then transported to the reverse osmosis membrane filter element 1. The pure water filtered by the reverse osmosis membrane filter element 1 enters the water storage component 21 from the pure water end of the reverse osmosis membrane filter element 1, so as to realize the production of pure water from pure water and obtain pure water with a lower TDS value. That is, the reverse osmosis membrane filter element 1 is immersed in pure water with a lower TDS value.

[0209] Scenario 5: Pure water circulation operation using the second return branch 3:

[0210] like Figure 12 As shown, after reflux in the second reflux branch 3, a second circulation reflux is performed. The inlet valve 111 and the water supply valve 43 are closed, and the first reflux valve 41 and the second reflux valve 42 are opened. The booster pump 61 is adjusted to the first working mode so that pure water can be used to produce water. The pure water in the water storage component 21 is pressurized by the booster pump 61 and then transported to the reverse osmosis membrane filter element 1. The pure water filtered by the reverse osmosis membrane filter element 1 flows back from the pure water end of the reverse osmosis membrane filter element 1 through the second reflux branch 3 to the inlet end of the reverse osmosis membrane filter element 1, so as to realize the production of pure water from pure water and obtain pure water with a lower TDS value. That is, the reverse osmosis membrane filter element 1 is immersed in pure water with a lower TDS value.

[0211] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A waterway system for a water purification apparatus, characterized in that, The waterway system has a backflow mode, and the waterway system comprises: a reverse osmosis membrane filter core (1) having a water inlet end in communication with a water inlet main path (13); a backflow module comprising a backflow pipeline, a water storage member (21) and a driving pump, the water inlet end of the backflow pipeline being capable of being in communication with the pure water end of the reverse osmosis membrane filter core (1), the water outlet end of the backflow pipeline being in communication with the water inlet end of the reverse osmosis membrane filter core (1), the outlet (212) of the water storage member (21) being in communication with the backflow pipeline, and the driving pump being arranged to drive the water in the pure water end of the reverse osmosis membrane filter core (1) and / or the water storage member (21) to backflow to the water inlet end of the reverse osmosis membrane filter core (1) when the waterway system is in the backflow mode; and a detection assembly for detecting the water amount information in the water storage member (21); wherein the detection assembly is in communication connection with the backflow module so as to selectively start or end the backflow mode according to the detection signal of the detection assembly.

2. The water system for a drinking water purification device according to claim 1, characterized in that, The detection assembly comprises a high liquid level detection member (214) for detecting a preset first high liquid level in the water storage member (21), wherein the high liquid level detection member (214) is in communication connection with the backflow module so as to selectively enable the backflow module to start the backflow mode according to the detection result of the high liquid level detection member (214).

3. The water system for a drinking water purification device according to claim 2, characterized in that, The detection assembly further comprises an anti-overflow liquid level detection member (215) for detecting a preset second high liquid level in the water storage member (21), the second high liquid level being higher than the first high liquid level, wherein the anti-overflow liquid level detection member (215) is in communication connection with the backflow module so as to selectively enable the backflow module to start the backflow mode according to the detection result of the anti-overflow liquid level detection member (215).

4. The water system for a drinking water purification device according to claim 1, characterized in that, The backflow pipeline comprises a first backflow branch (2) and a first backflow valve (41) arranged on the first backflow branch (2), the water inlet end of the first backflow branch (2) being capable of being in communication with the pure water end of the reverse osmosis membrane filter core (1), the water outlet end of the first backflow branch (2) being in communication with the water inlet end of the reverse osmosis membrane filter core (1), the water storage member (21) being arranged in series on the first backflow branch (2), the first backflow valve (41) being arranged at the downstream end of the water storage member (21), and the detection assembly being in communication connection with the first backflow valve (41).

5. The water system for a drinking water purification device according to claim 1, characterized in that, The backflow mode comprises a pure water backflow operation and a mixed water backflow operation, under the pure water backflow operation, the pure water in the water storage member (21) can backflow to the reverse osmosis membrane filter core (1) through the backflow pipeline; under the mixed water backflow operation, the waterway system is arranged to enable the pure water at the pure water end of the reverse osmosis membrane filter core (1) to backflow to the water inlet end of the reverse osmosis membrane filter core (1) through the backflow pipeline, to be mixed with the raw water in the water inlet main path (13) and then to backflow to the reverse osmosis membrane filter core (1).

6. The water system for a drinking water purification device according to claim 5, characterized in that, The return pipeline comprises a first return branch (2) and a second return branch (3), the water inlet ends of the first return branch (2) and the second return branch (3) can communicate with the pure water end of the reverse osmosis membrane filter core (1), the water outlet ends of the first return branch (2) and the second return branch (3) communicate with the water inlet end of the reverse osmosis membrane filter core (1), the water storage member (21) is arranged in series on the first return branch (2), the return module further comprises a control assembly, the control assembly can selectively conduct the first return branch (2) and / or the second return branch (3), and the detection assembly is in communication connection with the control assembly.

7. The water system for a drinking water purification device according to claim 6, characterized in that, The control assembly comprises a water replenishing valve (43) and a first return valve (41) arranged on the first return branch (2) and a second return valve (42) arranged on the second return branch (3), the water replenishing valve (43) is arranged between the water inlet end of the first return branch (2) and the inlet (211) of the water storage member (21), and the first return valve (41) is arranged between the water outlet end of the first return branch (2) and the outlet (212); Alternatively, the control assembly comprises a first reversing valve (44) and a water replenishing valve (43), the outlet (212) of the water storage member (21) communicates with a first interface of the first reversing valve (44), the water outlet end of the second return branch (3) communicates with a second interface of the first reversing valve (44), a third interface of the first reversing valve (44) communicates with the water inlet end of the reverse osmosis membrane filter core (1), and the water replenishing valve (43) is arranged between the water inlet end of the first return branch (2) and the inlet (211) of the water storage member (21), wherein the third interface of the first reversing valve (44) can selectively communicate with the first interface or the second interface; Alternatively, the control assembly comprises a first return valve (41) and a second reversing valve (45), the first return valve (41) is arranged between the water outlet end of the first return branch (2) and the outlet (212), a first interface of the second reversing valve (45) communicates with the inlet (211) of the water storage member (21), a second interface of the second reversing valve (45) communicates with the water inlet end of the second return branch (3), and a third interface of the second reversing valve (45) communicates with the pure water end of the reverse osmosis membrane filter core (1), wherein the third interface of the second reversing valve (45) can selectively communicate with the first interface or the second interface; Alternatively, the control assembly comprises a first reversing valve (44) and a second reversing valve (45), wherein the outlet (212) of the water storage member (21) is in communication with a first interface of the first reversing valve (44), the water outlet end of the second backflow branch (3) is in communication with a second interface of the first reversing valve (44), a third interface of the first reversing valve (44) is in communication with the water inlet end of the reverse osmosis membrane filter core (1), and the third interface of the first reversing valve (44) is selectively in communication with the first interface or the second interface; the first interface of the second reversing valve (45) is in communication with the inlet (211) of the water storage member (21), the second interface of the second reversing valve (45) is in communication with the water inlet end of the second backflow branch (3), and the third interface of the second reversing valve (45) is in communication with the pure water end of the reverse osmosis membrane filter core (1), and the third interface of the second reversing valve (45) is selectively in communication with the first interface or the second interface.

8. The water system for a drinking water purification device according to claim 5, characterized in that, The waterway system further comprises a flow control assembly arranged to adjust the ratio between the pure water flow into the reverse osmosis membrane filter core (1) through the backflow pipeline and the raw water flow into the reverse osmosis membrane filter core (1) through the water inlet main pipeline (13).

9. The water system for a drinking water purification device according to claim 8, characterized in that, The flow control assembly comprises a first flow control member (71) arranged on the backflow pipeline and used to adjust the pure water flow into the reverse osmosis membrane filter core (1) through the backflow pipeline, and a second flow control member (72) arranged on the water inlet main pipeline (13) and used to adjust the raw water flow into the reverse osmosis membrane filter core (1) through the water inlet main pipeline (13). Alternatively, the flow control assembly comprises a proportional adjusting valve (73), a first inlet of the proportional adjusting valve (73) is in communication with the water outlet end of the backflow pipeline, a second inlet of the proportional adjusting valve (73) is in communication with the water outlet end of the water inlet main pipeline (13), and an outlet of the proportional adjusting valve (73) is in communication with the water inlet end of the reverse osmosis membrane filter core (1).

10. The water system for a drinking water purification device according to claim 8, characterized in that, The waterway system further comprises a water inlet quality detection member used to detect the water quality information in the water inlet main pipeline (13), and the water inlet quality detection member is in communication connection with the flow control assembly so as to adjust the ratio between the pure water flow into the reverse osmosis membrane filter core (1) through the backflow pipeline and the raw water flow into the reverse osmosis membrane filter core (1) through the water inlet main pipeline (13) according to the detection data of the water inlet quality detection member.

11. The water system for a drinking water purification device according to claim 1, characterized in that, The water outlet end of the backflow pipeline is in communication with the upstream end of a booster pump (61), and the backflow mode comprises a pure water circulation operation, under which the booster pump (61) can also drive at least part of the pure water in the water storage member (21) to enter the water inlet end of the reverse osmosis membrane filter core (1) and return to the water inlet end from the pure water end thereof or return to the water storage member (21) to perform a circulation flushing of the reverse osmosis membrane filter core (1).

12. The water system for a drinking water purification device according to claim 11, characterized in that, The backflow pipeline comprises a first backflow branch (2), a water inlet end of the first backflow branch (2) can communicate with a pure water end of the reverse osmosis membrane filter core (1), a water outlet end of the first backflow branch (2) communicates with a water inlet end of the booster pump (61), the water storage member (21) is arranged in series on the first backflow branch (2), Under the pure water circulation operation, the water inlet end and the water outlet end of the booster pump (61), the water inlet end and the pure water end of the reverse osmosis membrane filter core (1), and the water inlet end and the water outlet end of the first backflow branch (2) are sequentially communicated to form a circulation loop.

13. The water system for a drinking water purification device according to claim 11, characterized in that, The backflow pipeline comprises a second backflow branch (3), a water inlet end of the second backflow branch (3) can communicate with a pure water end of the reverse osmosis membrane filter core (1), a water outlet end of the second backflow branch (3) communicates with a water inlet end of the booster pump (61), Under the pure water circulation operation, the water inlet end and the water outlet end of the booster pump (61), the water inlet end and the pure water end of the reverse osmosis membrane filter core (1), and the water inlet end and the water outlet end of the second backflow branch (3) are sequentially communicated to form a circulation loop, and an outlet (212) of the water storage member (21) communicates with the circulation loop.

14. The water system for a drinking water purification device according to claim 1, characterized in that, The driving pump comprises a booster pump (61), a water inlet end of the booster pump (61) communicates with the water inlet main pipeline (13), a water outlet end of the booster pump (61) communicates with a water inlet end of the reverse osmosis membrane filter core (1), the booster pump (61) is used for conveying pure water in the reverse osmosis membrane filter core (1) and / or the water storage member (21) to the water inlet end of the reverse osmosis membrane filter core (1), and the detection assembly is in communication connection with the booster pump (61); And / or, the driving pump comprises a self-priming pump (62), the self-priming pump (62) is arranged on the backflow pipeline and is used for conveying pure water in the water storage member (21) to the water inlet end of the reverse osmosis membrane filter core (1), and the detection assembly is in communication connection with the self-priming pump (62).

15. The water system for a drinking water purification device according to claim 1, characterized in that, The detection assembly comprises a low liquid level detection member (213) for detecting a preset low liquid level in the water storage member (21), wherein the low liquid level detection member (213) is in communication connection with the backflow module, so as to selectively make the backflow module end the backflow mode according to a detection signal of the low liquid level detection member (213).

16. The water system for a drinking water purification device according to claim 1, characterized in that, The waterway system further comprises a pre-filter unit (51), a water inlet end of the pre-filter unit (51) is connected to a water source, and a water outlet end of the pre-filter unit (51) communicates with a water inlet end of the reverse osmosis membrane filter core (1) through the water inlet main pipeline (13); And / or, the waterway system further comprises a post-filter unit (52), the pure water end of the reverse osmosis membrane filter core (1) is communicated with the water inlet end of the post-filter unit (52), the inlet (211) of the water storage member (21) is communicated with the water outlet end of the post-filter unit (52), and the backflow module is arranged to drive the pure water at the water outlet end of the post-filter unit (52) and / or the pure water in the water storage member (21) to backflow to the water inlet end of the reverse osmosis membrane filter core (1).

17. The water system for a drinking water purification device according to claim 1, characterized in that, The waterway system further comprises a water outlet assembly and a water replenishment module, the pure water end of the reverse osmosis membrane filter core (1) is communicated with the water outlet assembly through a pure water output pipe (81) so as to output the pure water at the pure water end of the reverse osmosis membrane filter core (1), and the water replenishment module is arranged to enable the pure water end of the reverse osmosis membrane filter core (1) to be communicated with the inlet (211) of the water storage member (21) so as to replenish water to the water storage member (21), The water outlet assembly and the water replenishment module are communicatively connected so as to selectively control the opening and closing of the water replenishment module according to the water outlet state of the water outlet assembly.

18. The water system for a drinking water purification device according to claim 17, characterized in that, The water outlet assembly comprises a mechanical faucet (821) and a high-pressure switch (831), the high-pressure switch (831) is arranged on the pure water output pipe (81) and is used to detect the water pressure in the pure water output pipe (81) to feed back the water outlet state of the water outlet assembly, and the high-pressure switch (831) is communicatively connected with the water replenishment module.

19. The water system for a drinking water purification device according to claim 17, characterized in that, The water outlet assembly comprises an electrically controlled faucet (822) and a pure water outlet valve (832), the pure water outlet valve (832) is arranged on the pure water output pipe (81) and is used to control the on-off of the pure water output pipe (81), the electrically controlled faucet (822) is communicatively connected with the pure water outlet valve (832) so as to cut off the pure water output pipe (81) when the electrically controlled faucet (822) is closed, and the electrically controlled faucet (822) and / or the pure water outlet valve (832) are communicatively connected with the water replenishment module.

20. A net drink apparatus, characterized by The water purification device comprises the waterway system for water purification device according to any one of claims 1 to 19.

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