Water purification equipment control method, device, computer equipment and water purification equipment

Abstract

The present application relates to a water purification equipment control method, device, computer equipment, storage medium, computer program product and water purification equipment. The method includes: when the water purification equipment equipped with a reverse osmosis membrane filter element finishes water production, obtaining the water quality difference before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element; determining the standby time before reflux based on the water quality difference before reflux, and when the standby time after the water production ends reaches the standby time before reflux, running the pure water reflux mode; in the process of running the pure water reflux mode, obtaining the water quality collection interval time, obtaining the water quality change of the concentrated water side of the filter element according to the water quality collection interval time, and stopping the pure water reflux mode when any water quality change obtained at any time is less than or equal to the change threshold. The use of this method can effectively improve the desalination rate of the first cup of water.

Description

Technical Field

[0001] The present application relates to the technical field of water purification equipment control, and in particular to a water purification equipment control method, device, computer equipment, storage medium, computer program product, and water purification equipment. Background Art

[0002] With the advancement of water purification technology, reverse osmosis (RO) membranes designed based on reverse osmosis (RO) technology are now commonly used as filter elements in water purification systems. During the standby period after water production, water purification systems equipped with RO membrane elements remain immersed in water. Because the salt ion concentration (water quality value) on the pure water side of the RO membrane element is lower than that on the raw water / concentrated water side, osmotic pressure causes salt ions from the raw water / concentrated water side to permeate into the pure water side. The longer the standby period, the more salt ions permeate through. If water is produced again after a period of stagnation, the first cup of water will contain pure water containing the permeated salt ions, resulting in a higher salt ion concentration and a lower desalination rate.

[0003] In traditional technology, to improve the quality of the first glass of water, a pure water return branch is typically installed between the raw water inlet and the pure water outlet of the reverse osmosis membrane filter element. This allows the pure water to flow back to the raw water side through the pure water return mode and mix with the raw water, thereby reducing the salt ion concentration of the raw water / concentrated water obtained by concentrating the raw water. This effectively reduces the difference in salt ion concentration between the pure water side and the raw water side / concentrated water side during static standing, thereby reducing the salt ion diffusion rate on both sides of the reverse osmosis membrane during static standing, and improving the first glass of water produced after a period of static standing. However, when controlling the pure water return mode of water purification equipment in traditional technology, it is usually executed according to pre-set fixed parameters. It is unable to intelligently adjust the parameters of the pure water return mode based on the salt ion concentration under actual operating conditions, resulting in an inability to effectively improve the desalination rate of the first glass of water. Summary of the Invention

[0004] Based on this, it is necessary to provide a water purification equipment control method, device, computer equipment, computer-readable storage medium, computer program product and water purification equipment to address the technical problem that when traditional technology controls the water purification equipment to operate in pure water reflux mode, it is unable to intelligently adjust the parameters of the pure water reflux mode based on the water salt ion concentration under actual working conditions, resulting in the inability to effectively improve the desalination rate of the first cup of water.

[0005] In a first aspect, the present application provides a water purification equipment control method, comprising:

[0006] When the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production, the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element is obtained;

[0007] According to the water quality difference before reflux, the standby time before reflux is determined. When the standby time after the water production is completed reaches the standby time before reflux, the pure water reflux mode is operated;

[0008] During the operation of the pure water reflux mode, the water quality collection interval is obtained, and the water quality change of the concentrated water side of the filter element is obtained according to the water quality collection interval. When the water quality change obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped.

[0009] In one embodiment, determining the standby time before backflow based on the water quality difference before backflow includes:

[0010] Obtaining a first mapping relationship between a plurality of pre-reflow water quality difference intervals and a standby time for running a pure water reflow mode after water production is completed and the pre-reflow water quality difference intervals;

[0011] According to the first mapping relationship and the pre-reflow water quality difference interval to which the pre-reflow water quality difference belongs, a pre-reflow standby time length that matches the pre-reflow water quality difference is determined.

[0012] In one embodiment, determining a pre-reflow standby time that matches the pre-reflow water quality difference according to the first mapping relationship and the pre-reflow water quality difference interval to which the pre-reflow water quality difference belongs includes:

[0013] If the pre-backflow water quality difference is greater than or equal to the first preset value, it is determined that the pre-backflow water quality difference belongs to the first water quality difference interval, and the first standby time mapped to the first water quality difference interval in the first mapping relationship is used as the pre-backflow standby time matching the pre-backflow water quality difference;

[0014] If the water quality difference before backflow is greater than the second preset value and less than the first preset value, it is determined that the water quality difference before backflow belongs to the second water quality difference interval, and the second standby time mapped by the second water quality difference interval in the first mapping relationship is used as the standby time before backflow; the second standby time is greater than the first standby time;

[0015] If the water quality difference before backflow is less than or equal to the second preset value, it is determined that the water quality difference before backflow belongs to the third water quality difference interval, and the third standby time mapped by the third water quality difference interval in the first mapping relationship is used as the standby time before backflow; the third standby time is greater than the second standby time.

[0016] In one embodiment, obtaining the water quality change of the concentrated water side of the filter element according to the water quality collection interval includes:

[0017] The time point when the pure water reflux mode is started is taken as the starting time point. From the starting time point, every time the water quality sampling interval is reached, the concentrated water side water quality value representing the water quality of the concentrated water side of the filter element is extracted;

[0018] Determine the water quality difference between the extracted concentrated water side water quality value and the concentrated water side water quality value extracted last time, and use the water quality difference as the water quality change of the concentrated water side water quality of the filter element.

[0019] In one embodiment, the water purification equipment control method further includes:

[0020] When the pure water reflux mode is stopped, the difference in water quality after reflux between the concentrated water side of the filter element and the pure water side of the filter element is obtained;

[0021] The standby time after reflux is determined according to the water quality difference after reflux. When the standby time after stopping the pure water reflux mode reaches the standby time after reflux, the pure water reflux mode is operated.

[0022] In one embodiment, determining the standby time after reflux based on the water quality difference after reflux includes:

[0023] Acquire a plurality of post-reflux water quality difference intervals, and a second mapping relationship between a standby time for running a pure water reflux mode after pure water reflux is completed and the post-reflux water quality difference intervals;

[0024] According to the second mapping relationship and the post-reflux water quality difference interval to which the post-reflux water quality difference belongs, a post-reflux standby time length that matches the post-reflux water quality difference is determined.

[0025] In one embodiment, determining the post-reflow standby time that matches the post-reflow water quality difference according to the second mapping relationship and the post-reflow water quality difference interval to which the post-reflow water quality difference belongs includes:

[0026] If the post-reflow water quality difference is greater than or equal to the third preset value, it is determined that the post-reflow water quality difference belongs to the fourth water quality difference interval, and the fourth standby time mapped to the fourth water quality difference interval in the second mapping relationship is used as the post-reflow standby time matching the post-reflow water quality difference;

[0027] If the water quality difference after the return flow is greater than the fourth preset value and less than the third preset value, it is determined that the water quality difference after the return flow belongs to the fifth water quality difference interval, and the fifth standby time mapped to the fifth water quality difference interval in the second mapping relationship is used as the standby time after the return flow; the fifth standby time is greater than the fourth standby time;

[0028] If the water quality difference after reflux is less than or equal to the fourth preset value, it is determined that the water quality difference after reflux belongs to the sixth water quality difference interval, and the sixth standby time mapped by the sixth water quality difference interval in the second mapping relationship is used as the standby time after reflux; the sixth standby time is greater than the fifth standby time.

[0029] In a second aspect, the present application also provides a water purification equipment control device, comprising:

[0030] The module for obtaining the difference in water quality before reflux is used to obtain the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element when the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production;

[0031] The module for determining the standby time before reflux is used to determine the standby time before reflux based on the water quality difference before reflux. When the standby time after the water production is completed reaches the standby time before reflux, the pure water reflux mode is operated;

[0032] The pure water reflux mode stop module is used to obtain the water quality collection interval duration during the operation of the pure water reflux mode, and obtain the water quality change of the concentrated water side of the filter element according to the water quality collection interval duration. When the water quality change obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped.

[0033] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are performed:

[0034] When the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production, the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element is obtained;

[0035] According to the water quality difference before reflux, the standby time before reflux is determined. When the standby time after the water production is completed reaches the standby time before reflux, the pure water reflux mode is operated;

[0036] During the operation of the pure water reflux mode, the water quality collection interval is obtained, and the water quality change of the concentrated water side of the filter element is obtained according to the water quality collection interval. When the water quality change obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped.

[0037] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the following steps:

[0038] When the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production, the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element is obtained;

[0039] According to the water quality difference before reflux, the standby time before reflux is determined. When the standby time after the water production is completed reaches the standby time before reflux, the pure water reflux mode is operated;

[0040] During the operation of the pure water reflux mode, the water quality collection interval is obtained, and the water quality change of the concentrated water side of the filter element is obtained according to the water quality collection interval. When the water quality change obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped.

[0041] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the following steps:

[0042] When the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production, the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element is obtained;

[0043] According to the water quality difference before reflux, the standby time before reflux is determined. When the standby time after the water production is completed reaches the standby time before reflux, the pure water reflux mode is operated;

[0044] During the operation of the pure water reflux mode, the water quality collection interval is obtained, and the water quality change of the concentrated water side of the filter element is obtained according to the water quality collection interval. When the water quality change obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped.

[0045] The above-mentioned water purification equipment control method, device, computer equipment, storage medium and computer program product can obtain the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element under actual working conditions when the water purification equipment equipped with a reverse osmosis membrane filter element has completed water production, thereby determining the pre-reflux standby time based on the pre-reflux water quality difference under actual working conditions. When the standby time after the completion of water production reaches the pre-reflux standby time, the pure water reflux mode is operated. During the operation of the pure water reflux mode, the water quality collection interval is obtained, thereby obtaining the water quality change of the concentrated water side of the filter element under actual working conditions according to the water quality collection interval. When the water quality change under actual working conditions obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped. During the entire control process, the parameters for executing the pure water reflux mode can be intelligently adjusted based on the water salt ion concentration (water quality value) under actual working conditions. For example, based on the water quality value under actual working conditions, the standby time before reflux and whether to stop the pure water reflux mode can be determined, instead of executing the pure water reflux mode according to pre-set fixed parameters as in traditional technology, thereby effectively improving the desalination rate of the first cup of water.

[0046] In a sixth aspect, the present application further provides a water purification device, comprising:

[0047] The reverse osmosis membrane filter element is provided with a raw water inlet, a concentrated water outlet, a pure water outlet and a pure water return port;

[0048] A concentrated water branch is connected to the concentrated water outlet and is provided with a first water quality detection device for detecting the water quality on the concentrated water side of the reverse osmosis membrane filter element;

[0049] A pure water branch, the pure water branch is connected to the pure water outlet, and a second water quality detection device for detecting the water quality on the pure water side of the reverse osmosis membrane filter element is provided on the pure water branch;

[0050] A pure water reflux branch, one end of which is connected to the pure water reflux port, and the other end is connected to the raw water inlet;

[0051] The controller controls the conduction state of the pure water reflux branch by executing the above-mentioned water purification equipment control method to control the operating state of the pure water reflux mode in the water purification equipment.

[0052] In one embodiment, the pure water return branch is provided with a check valve and a water inlet valve;

[0053] When the water purification equipment is running in pure water reflux mode, the water inlet valve is turned on, and the pure water produced by the reverse osmosis membrane filter element flows from the pure water reflux port through the check valve and then flows into the raw water inlet.

[0054] The above-mentioned water purification equipment includes: a reverse osmosis membrane filter element, which is provided with a raw water inlet, a concentrated water outlet, a pure water outlet and a pure water return outlet; a concentrated water branch, which is connected to the concentrated water outlet, and is provided with a first water quality detection device for detecting the water quality of the concentrated water side of the reverse osmosis membrane filter element; a pure water branch, which is connected to the pure water outlet, and is provided with a second water quality detection device for detecting the water quality of the pure water side of the reverse osmosis membrane filter element; a pure water reflux branch, one end of the pure water reflux branch is connected to the pure water reflux outlet, and the other end is connected to the raw water inlet; a controller, which controls the conduction state of the pure water reflux branch by executing the above-mentioned water purification equipment control method to control the operating state of the pure water reflux mode in the water purification equipment. When the above-mentioned water purification equipment operates in the pure water reflux mode, the pure water produced by the pure water reflux port can be returned to the raw water inlet through the pure water reflux branch, thereby effectively reducing the water salt ion concentration (water quality value) of the raw water side and improving the first cup of water. On this basis, by executing the above-mentioned water purification equipment control method, the parameters for executing the pure water reflux mode can be intelligently adjusted in combination with the water salt ion concentration under actual working conditions, rather than executing the pure water reflux mode according to pre-set fixed parameters as in traditional technology, thereby effectively improving the desalination rate of the first cup of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 This is an application environment diagram of a water purification equipment control method in one embodiment;

[0056] Figure 2 Schematic diagram of a flow chart of a water purification equipment control method in one embodiment;

[0057] Figure 3 This is a schematic diagram of a process for intelligently controlling a water purification device to operate in a pure water reflux mode in accordance with actual working conditions in one embodiment;

[0058] Figure 4 A schematic diagram of a process for determining a pre-backflow standby time based on a pre-backflow water quality difference in one embodiment;

[0059] Figure 5 A schematic diagram of a process for determining a pre-backflow standby time based on a pre-backflow water quality difference in another embodiment;

[0060] Figure 6 A schematic diagram of a process for obtaining a water quality change amount of the concentrated water side of a filter element according to a water quality sampling interval in one embodiment;

[0061] Figure 7 1. A flow chart of restarting the pure water reflux mode based on the post-reflux standby time after stopping the pure water reflux mode in one embodiment;

[0062] Figure 8 A schematic diagram of a process for determining a post-reflux standby time based on a post-reflux water quality difference in one embodiment;

[0063] Figure 9 A schematic diagram of a process for determining a post-reflux standby time based on a post-reflux water quality difference in another embodiment;

[0064] Figure 10 A schematic diagram of a flow chart for controlling a water purification device to operate in a pure water reflux mode based on actual working conditions in one embodiment;

[0065] Figure 11 This is a schematic structural diagram of a water purification device in one embodiment;

[0066] Figure 12 Schematic diagram of the structure of a water purification device in which a check valve and a water inlet valve are provided in a pure water return branch in one embodiment;

[0067] Figure 13 This is a schematic structural diagram of a water purification device in which a pressure-stabilizing pump is provided in a raw water branch in one embodiment;

[0068] Figure 14 This is a structural block diagram of a water purification equipment control device in one embodiment;

[0069] Figure 15 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0071] The water purification equipment control method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Specifically, the controller 102 in the water purification equipment 100 can communicate with the terminal device 200 through the network, and respond to the water production mode start instruction triggered by the user using the terminal device 200 to control the water purification equipment 100 to start water production. When the controller 102 detects that the water purification equipment 100 equipped with the reverse osmosis membrane filter element 104 has finished water production, the controller 102 can further obtain the water quality difference before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element of the reverse osmosis membrane filter element 104, thereby determining the standby time before reflux based on the water quality difference before reflux. When the standby time after the end of water production reaches the standby time before reflux, the controller 102 can control the water purification equipment 100 to run the pure water reflux mode. During the operation of the pure water reflux mode, the controller 102 can obtain the water quality collection interval time, and obtain the water quality change of the concentrated water side of the filter element according to the water quality collection interval time. When the water quality change amount obtained at any time is less than or equal to the change amount threshold, the controller 102 can control the water purification device 100 to stop running the pure water reflow mode.

[0072] The water purifier 100 is a device used to remove impurities and harmful substances from water, improving its quality for specific uses (such as drinking). The controller 102 is the core component of the water purifier 100 and can control the different modes of operation of the water purifier 100. Its operating principle is to receive input signals, process them through internal logic, and issue control commands, thereby achieving automatic control of the device or system. The reverse osmosis membrane in the reverse osmosis membrane filter element 104 is an artificial semipermeable membrane simulated by a biological semipermeable membrane, enabling the reverse osmosis membrane filter element 104 to effectively filter dissolved salts, colloids, microorganisms, and other substances from water. In this embodiment, the reverse osmosis membrane filter element 104 can be equipped with a raw water inlet, a concentrated water outlet, a pure water outlet, and a pure water return port. The raw water inlet is used to connect to a tap water pipeline, the concentrated water outlet is used to discharge concentrated water produced after filtering the raw water, the pure water outlet can be connected to a faucet, allowing users to obtain purified water (cleaned water) produced after filtering the raw water, and the pure water return port is used to connect the filtered pure water to the pure water return line. The terminal device 200 may be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, Internet of Things devices, etc.

[0073] In another application scenario, the housing of the water purification device 100 can also be configured with a touch screen / button, and the user can trigger instructions by clicking the touch screen / button (without the help of the terminal device 200), for example, triggering a water production mode start instruction, so that the controller 102 controls the water purification device 100 to run the water production mode.

[0074] In one embodiment, Figure 2As shown, a water purification equipment control method is provided, which is applied to Figure 1 The controller 102 in FIG. 1 is taken as an example to illustrate, including the following steps:

[0075] Step 202 , when the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production, obtain the water quality difference before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element.

[0076] The water purification equipment is also equipped with multiple water quality detection devices, at least one of which is used to detect the water quality on the concentrate side of the reverse osmosis membrane filter element, and at least one of which is used to detect the water quality on the pure water side of the filter element. The water quality on the concentrate side of the filter element specifically refers to the salt ion concentration of the concentrate produced from the concentrate outlet of the reverse osmosis membrane filter element, while the water quality on the pure water side of the filter element specifically refers to the salt ion concentration of the pure water produced from the pure water outlet of the reverse osmosis membrane filter element. The concentrate on the concentrate side of the filter element is obtained by concentrating raw water from the raw water side. Therefore, the water quality on the concentrate side of the filter element is positively correlated with the water quality on the raw water side of the filter element (the higher the salt ion concentration of the raw water, the higher the salt ion concentration of the concentrate). In this embodiment, by measuring the pre-reflow water quality difference between the concentrate side of the filter element and the pure water side of the filter element, the salt ion concentration difference between the pure water side and the raw water / concentrate side can be determined.

[0077] Optionally, during the water production process of a water purification device equipped with a reverse osmosis membrane filter cartridge, a water quality detection device installed in the water purification device detects the water quality on the concentrate side of the filter cartridge and the water quality on the pure water side of the filter cartridge in real time, and the water quality detection device feeds back the real-time detection results to a controller. When the controller detects that water production has been completed by the water purification device, the controller can obtain, through the water quality detection device, the water quality value of the concentrate side of the filter cartridge and the water quality value of the pure water side of the filter cartridge at the time of completion of water production, thereby determining the pre-reflow water quality difference between the water quality on the concentrate side of the filter cartridge and the water quality on the pure water side of the filter cartridge at the time of completion of water production.

[0078] Exemplarily, the pre-reflux water quality difference between the concentrated water side of the filter element and the pure water side of the filter element = the water quality value of the concentrated water side of the filter element at the end of water production minus the water quality value of the pure water side of the filter element at the end of water production. The concentrated water on the concentrated water side of the filter element is produced by concentrating raw water and has a significant water quality difference from the pure water on the pure water side of the filter element. Therefore, in this embodiment, the water quality difference between the concentrated water side of the filter element and the pure water side of the filter element is selected as the pre-reflux water quality difference. In this embodiment, the water quality detection device used to measure water quality can be a TDS probe. The measured water quality value is the salt ion concentration of the water, also known as the TDS value. The TDS probe can be used to measure solid substances dissolved in water, such as minerals and salt.

[0079] Step 204: Determine the pre-reflux standby time based on the pre-reflux water quality difference. When the standby time after water production is completed reaches the pre-reflux standby time, operate the pure water reflux mode.

[0080] Optionally, the controller can determine a pre-reflow standby time that matches the pre-reflow water quality difference based on a pre-configured pre-reflow standby time determination rule. This means the pre-reflow standby time can be intelligently and flexibly determined based on the water quality immediately after water production is completed under actual operating conditions. When the controller detects that the standby time after water production has reached the pre-reflow standby time, it can control the water purification equipment to operate in pure water reflow mode.

[0081] For example, the water purification device may be equipped with a timer connected to the controller. When the controller detects that the water purification device has finished producing water, the controller may control the timer to start timing to determine the standby time of the water purification device after the water production is completed. When the standby time after the water production is completed reaches the standby time before reflux, the controller may control the water purification device to operate in a pure water reflux mode. Alternatively, the controller may have an automatic timing function. When the controller detects that the water purification device has finished producing water, the controller may automatically start timing to determine the standby time of the water purification device after the water production is completed.

[0082] It should be noted that during the standby process of the water purification equipment, the controller can respond to the water production mode start instruction triggered by the user through the terminal device or the touch screen / button of the water purification equipment, and control the water purification equipment to operate in the water production mode. It can also respond to the pure water reflux mode start instruction triggered by the user through the terminal device or the touch screen / button of the water purification equipment, and control the water purification equipment to operate in the pure water reflux mode.

[0083] Step 206, during the operation of the pure water reflux mode, obtain the water quality collection interval duration, and obtain the water quality change of the concentrated water side of the filter element according to the water quality collection interval duration. When the water quality change obtained at any time is less than or equal to the change threshold, stop the operation of the pure water reflux mode.

[0084] The water quality collection interval can be flexibly configured based on actual collection needs, including but not limited to 1 second, 2 seconds, 3 seconds, and 5 seconds. The change threshold can also be flexibly configured based on actual collection needs. A water quality change less than or equal to the change threshold indicates that the water quality (salt ion concentration) on the concentrate side of the filter element has stabilized, and the pure water return can be stopped. Specifically, after the water purification system begins pure water return, the salt ion concentration of the concentrate on the concentrate side decreases due to dilution of the raw water by the returning pure water. However, the dilution capacity of the returning pure water is limited (pure water production is limited). During the pure water return process, the salt ion concentration of the concentrate gradually stabilizes. Therefore, if the change in water quality on the concentrate side of the filter element within the water quality collection interval is sufficiently small (less than or equal to the change threshold), it can be determined that the pure water return has reached its maximum potential for improvement and the return can be stopped.

[0085] Optionally, during the operation of the pure water reflux mode in the water purification equipment, at least one water quality detection device for detecting the water quality on the concentrated water side of the reverse osmosis membrane filter element will continuously detect the water quality on the concentrated water side of the filter element. Furthermore, starting from the start of the pure water reflux mode, the controller can periodically obtain the amount of water quality change on the concentrated water side of the filter element within the water quality collection interval according to the water quality collection interval. When the amount of water quality change obtained at any time is less than or equal to the change threshold, the controller can control the water purification equipment to stop operating in the pure water reflux mode, that is, it can intelligently control the end of a single pure water reflux based on the amount of water quality change on the concentrated water side of the filter element under actual working conditions.

[0086] It should be noted that when the controller controls the water purification equipment to operate in pure water reflux mode, if the user uses the terminal device or triggers the water production mode start instruction by clicking the touch screen / button of the water purification equipment, the controller will control the water purification equipment to stop operating in pure water reflux mode and start operating in water production mode.

[0087] Based on the above steps 202 to 206, if Figure 3 As shown, a flow chart of intelligently controlling the operation of pure water reflux mode of water purification equipment in combination with actual working conditions is provided, which mainly includes the following processes:

[0088] (1) After controlling the water purification equipment to start, the controller can first control the water purification equipment to be in a standby state. When receiving the water production mode start instruction, the controller can control the water purification equipment to run the water production mode. Otherwise, the water purification equipment is controlled to maintain the standby state.

[0089] (2) When it is detected that the water production is finished, the controller can control the water purification equipment to be in a standby state, and obtain the water quality of the concentrated water side of the reverse osmosis membrane filter element and the water quality of the pure water side of the filter element through the water quality detection device, thereby determining the difference in water quality before reflux between the water quality of the concentrated water side of the filter element and the water quality of the pure water side of the filter element. Furthermore, the controller can determine the pre-reflux standby time that matches the pre-reflux water quality difference according to the pre-configured pre-reflux standby time determination rule, thereby judging whether the standby time after the water production is finished reaches the pre-reflux standby time. If so, the water purification equipment is controlled to operate in the pure water reflux mode; otherwise, the water purification equipment is controlled to maintain standby.

[0090] (3) During the operation of the pure water return mode, the controller can obtain the water quality collection interval duration, and thus obtain the water quality change of the concentrated water side of the filter element according to the water quality collection interval duration. If the water quality change obtained at any time is less than or equal to the change threshold, the water purification equipment is controlled to stop running the pure water return mode. Otherwise, the water purification equipment is controlled to continue running the pure water return mode.

[0091] The above-mentioned water purification equipment control method can obtain the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element under actual operating conditions when the water purification equipment equipped with a reverse osmosis membrane filter element has completed water production, thereby determining the pre-reflux standby time based on the pre-reflux water quality difference under actual operating conditions. When the standby time after the completion of water production reaches the pre-reflux standby time, the pure water reflux mode is operated. During the operation of the pure water reflux mode, the water quality collection interval is obtained, and the water quality change of the concentrated water side of the filter element under actual operating conditions is obtained according to the water quality collection interval. When the water quality change under actual operating conditions obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped. During the entire control process, the parameters for executing the pure water reflux mode can be intelligently adjusted based on the water salt ion concentration (water quality value) under actual working conditions. For example, based on the water quality value under actual working conditions, the standby time before reflux and whether to stop the pure water reflux mode can be determined, instead of executing the pure water reflux mode according to pre-set fixed parameters as in traditional technology, thereby effectively improving the desalination rate of the first cup of water.

[0092] In an exemplary embodiment, Figure 4 As shown, a flow chart of determining the standby time before backflow based on the water quality difference before backflow is provided, which mainly includes the following steps:

[0093] Step 402 : obtaining a plurality of pre-reflow water quality difference intervals and a first mapping relationship between the standby time for running the pure water reflow mode after water production is completed and the pre-reflow water quality difference intervals.

[0094] The obtained multiple pre-reflow water quality difference intervals and the first mapping relationship match the model of the reverse osmosis membrane filter element installed in the water purification equipment. The first mapping relationship is: each pre-reflow water quality difference interval is mapped to which standby time duration. If the first mapping relationship includes A mapping to B, then A is one of the multiple pre-reflow water quality difference intervals, and B is one of the multiple standby time durations for operating the pure water reflow mode after water production is completed.

[0095] Optionally, the controller stores a plurality of pre-established pre-reflow water quality difference intervals and a first mapping relationship between the standby time and the pre-reflow water quality difference intervals. The standby time here refers to the standby time for operating the pure water reflow mode after water production is completed. Based on this, after determining the pre-reflow water quality difference at the end of water production, the controller can obtain the plurality of pre-reflow water quality difference intervals and the first mapping relationship from the stored data.

[0096] It should be noted that regarding how to determine multiple pre-reflux water quality difference intervals and the first mapping relationship: considering that there are multiple models of reverse osmosis membrane filter elements, for each model of reverse osmosis membrane filter element, testers can conduct multiple rounds of testing in advance to obtain multiple pre-reflux water quality difference intervals and the first mapping relationship corresponding to each model of reverse osmosis membrane filter element. For example, for a reverse osmosis membrane filter element of model X, after water production is completed, the water salt ion increase rate corresponding to the pure water side can be tested under the water salt ion concentration difference between the concentrated water side and the pure water side. Based on the test data, multiple water salt ion concentration difference intervals can be obtained, that is, multiple pre-reflux water quality difference intervals corresponding to the X model reverse osmosis membrane filter element are obtained, so that the water salt ion increase rates corresponding to the water salt ion concentration difference within the same pre-reflux water quality difference interval are close. Furthermore, for each pre-reflux water quality difference interval, the tester can test how long the standby time is before starting the pure water reflux mode to maximize the improvement of the first cup of water, thereby obtaining the standby time mapped for each pre-reflux water quality difference interval, and then constructing a first mapping relationship for the X-type reverse osmosis membrane filter element. Similarly, the tester can determine the multiple pre-reflux difference intervals and the first mapping relationship corresponding to each model of reverse osmosis membrane filter element through laboratory testing. For each water purification equipment, when the equipment is installed, the first mapping relationship and the multiple pre-reflux difference intervals corresponding to the model of the reverse osmosis membrane filter element installed in the water purification equipment can be stored in the controller of the water purification equipment according to the model of the reverse osmosis membrane filter element so that the controller can obtain them.

[0097] Step 404 : Determine a pre-reflow standby time that matches the pre-reflow water quality difference according to the first mapping relationship and the pre-reflow water quality difference interval to which the pre-reflow water quality difference belongs.

[0098] Among them, each water quality difference interval before backflow is a value range.

[0099] Optionally, after determining the pre-reflow water quality difference at the end of water production, the controller can first determine the target pre-reflow water quality difference interval to which the pre-reflow water quality difference belongs, and then determine the pre-reflow standby time mapped by the target pre-reflow water quality difference interval by querying the first mapping relationship, and then use the pre-reflow standby time mapped by the target pre-reflow water quality difference interval as the pre-reflow standby time matching the pre-reflow water quality difference.

[0100] In this embodiment, the standby time for the pure water recirculation mode after water production is completed can be determined based on the pre-recirculation water quality difference (the difference in salt ion concentration between the concentrated water side and the pure water side) at the end of water production under actual operating conditions, rather than executing the pure water recirculation mode according to pre-set fixed parameters as in conventional techniques. For example, conventional techniques typically wait a fixed standby time after water production is completed before initiating the pure water recirculation mode, failing to determine when to initiate the pure water recirculation mode based on actual operating conditions. Compared to conventional techniques, this embodiment takes into account that varying degrees of salt ion concentration difference under actual operating conditions can lead to varying salt ion permeation rates, and thus varying pure water recirculation requirements. The standby time for the pure water recirculation mode after water production is completed can be determined based on the actual pre-recirculation water quality difference at the end of water production, allowing for the timely and accurate initiation of the pure water recirculation mode, thereby more effectively improving the desalination rate of the first cup of water.

[0101] Based on this, taking the case where multiple water quality difference intervals before backflow include: a first water quality difference interval, a second water quality difference interval, and a third water quality difference interval, the first water quality difference interval is [first preset value, +∞), the second water quality difference interval is (second preset value, first preset value), and the third water quality difference interval is (0, second preset value) as an example, in a possible embodiment, as Figure 5 As shown, step 404 also includes:

[0102] If the water quality difference before backflow is greater than or equal to the first preset value, execute step 502 to determine whether the water quality difference before backflow belongs to the first water quality difference interval, and use the first standby time mapped by the first water quality difference interval in the first mapping relationship as the standby time before backflow that matches the water quality difference before backflow.

[0103] If the water quality difference before backflow is greater than the second preset value and less than the first preset value, execute step 504 to determine that the water quality difference before backflow belongs to the second water quality difference interval, and use the second standby time mapped by the second water quality difference interval in the first mapping relationship as the standby time before backflow; the second standby time is greater than the first standby time.

[0104] If the water quality difference before backflow is less than or equal to the second preset value, execute step 506 to determine that the water quality difference before backflow belongs to the third water quality difference interval, and use the third standby time mapped by the third water quality difference interval in the first mapping relationship as the standby time before backflow; the third standby time is greater than the second standby time.

[0105] For example, taking the first preset value as TDS1 and the second preset value as TDS2, TDS1>TDS2, the first water quality difference interval [TDS1, +∞) corresponds to the standby time T1, the second water quality difference interval (TDS2, TDS1) corresponds to the standby time T2, the third water quality difference interval (0, TDS2] corresponds to the standby time T3, and T3>T2>T1. Among them, if the water quality difference before reflux belongs to the first water quality difference interval, it indicates that the concentration difference on both sides of the reverse osmosis membrane filter element is large when the water production is completed, and the tendency of inorganic salt components to penetrate from the concentrated water side through the membrane into the pure water side is strong, and the pure water reflux needs to be started as soon as possible. If the water quality difference before reflux belongs to the third water quality difference interval, it indicates that the concentration difference on both sides of the reverse osmosis membrane filter element is large when the water production is completed, and the tendency of inorganic salt components to penetrate from the concentrated water side through the membrane into the pure water side is strong, and the pure water reflux needs to be started as soon as possible. If the water quality difference falls within the second water quality difference range, it indicates that the concentration difference across the reverse osmosis membrane filter has decreased at the end of water production. This generally occurs in winter when water temperatures are low or after the filter element has been used for a period of time. At this time, the pure water flow rate decreases, the recovery rate of the water purification equipment decreases, the inorganic salt concentration ratio on the concentrate side of the reverse osmosis membrane decreases, and the concentration difference across the membrane decreases. After the water production is completed, the pure water return must be started promptly. Therefore, T2>T1. If the water quality difference before return falls into the third water quality difference range, it indicates that the concentration difference across the reverse osmosis membrane filter is small at the end of water production. The tendency of inorganic salt components to penetrate the membrane from the concentrate side into the pure water side is small. It is possible to wait longer before re-starting the pure water return. Therefore, T3>T2>T1.

[0106] In this embodiment, the standby time for running the pure water reflux mode after water production is completed can be determined based on the water quality difference before reflux at the end of water production under actual working conditions (the difference in water salt ion concentration between the concentrated water side and the pure water side), so that the pure water reflux mode can be started promptly and accurately subsequently, thereby effectively improving the desalination rate of the first cup of water.

[0107] In one embodiment, Figure 2 On the basis of Figure 6 As shown, a flow chart of obtaining the water quality change of the concentrated water side of the filter element according to the water quality collection interval is provided, which mainly includes the following steps:

[0108] Step 602: During operation of the pure water recirculation mode, obtain the water quality collection interval duration.

[0109] Among them, the water quality collection interval can be flexibly configured according to actual collection needs.

[0110] Optionally, the controller can pre-store the water quality collection interval duration so as to obtain the water quality collection interval duration during the process of controlling the water purification equipment to operate in the pure water reflux mode, thereby regularly obtaining the water quality value of the concentrated water side of the filter element through the water quality detection device on the concentrated water side of the filter element according to the water quality collection interval duration.

[0111] Step 604 : The time point when the pure water reflux mode is started is used as the starting time point. Starting from the starting time point, every time the water quality collection interval is reached, the concentrated water side water quality value representing the concentrated water side water quality of the filter element is extracted.

[0112] Optionally, the controller can use the time point when the pure water reflux mode starts to operate as the starting time point, and obtain the water quality value of the concentrated water side at the starting time point through the water quality detection device on the concentrated water side of the filter element, and starting from the starting time point, every time the water quality collection interval is reached, the water quality detection device on the concentrated water side of the filter element is periodically passed through the concentrated water side of the filter element to obtain the water quality value of the concentrated water side that characterizes the concentrated water side of the filter element.

[0113] For example, taking the water quality collection interval of 5 seconds as an example, if the controller controls the water purification equipment to start the pure water reflux mode at 9:00:00, the controller can obtain the water quality value TDS1 of the concentrated water side of the filter element at 9:00:00 through the water quality detection device on the concentrated water side of the filter element, and after waiting for the water quality collection interval, obtain the water quality value TDS2 of the concentrated water side of the filter element at 9:00:05.

[0114] Step 606 , determining the water quality difference between the extracted concentrate water quality value and the concentrate water quality value extracted last time, and using the water quality difference as the water quality change of the concentrate water quality of the filter element.

[0115] Optionally, each time the controller extracts a water quality value of the concentrated water side, it calculates the water quality value difference between the extracted water quality value of the concentrated water side and the water quality value of the concentrated water side extracted last time, and uses the calculated water quality value difference as the water quality change of the concentrated water side of the filter element within the water quality collection interval.

[0116] Furthermore, the controller can determine whether the water quality change obtained by each calculation is less than or equal to the change threshold. If the water quality change obtained by any calculation is less than or equal to the change threshold, step 608 is executed to stop running the pure water reflux mode; otherwise, return to step 604.

[0117] For example, assuming a 5-second water quality collection interval, if the controller controls the water purification equipment to activate pure water recirculation mode at 9:00:00, the controller can obtain the concentrate water quality value TDS1 at 9:00:00 through the water quality detection device on the concentrate side of the filter element, and obtain the concentrate water quality value TDS2 at 9:00:05. The controller then uses (TDS1-TDS2) as the water quality change between 9:00:00 and 9:00:05. If (TDS1-TDS2) is greater than the change threshold, the controller can obtain the concentrate water quality value TDS3 at 9:00:10, calculate and determine whether (TDS3-TDS2) is less than or equal to the change threshold. If (TDS1-TDS2) is less than or equal to the change threshold, the controller can control the water purification equipment to stop operating in pure water recirculation mode. If (TDS3 - TDS2) is greater than the change threshold, the concentrate water quality value TDS4 is obtained at 9:00:15 on the concentrate side of the filter element. This continues until the calculated water quality change is less than or equal to the change threshold, at which point the water purification system is controlled to stop operating in pure water recirculation mode. The reason for measuring the change in concentrate water quality is that during pure water recirculation mode, the change in concentrate water quality is more noticeable due to the dilution of the raw water.

[0118] In this embodiment, while the water purification equipment is operating in pure water recirculation mode, the change in the concentrate-side water quality value within each sampling interval determines whether to stop the pure water recirculation mode, rather than simply executing the pure water recirculation mode according to pre-set fixed parameters as in traditional technology. Therefore, this embodiment can intelligently determine whether to stop a single pure water recirculation cycle based on actual operating conditions, intelligently adjusting the duration of a single pure water recirculation cycle to improve the pure water recirculation effect and, in turn, effectively increase the desalination rate of the first cup of water.

[0119] It is understood that after the controller controls the water purification device to stop running the pure water reflux mode, the water purification device will be in a standby state. After a long standby period, the controller can control the water purification device to run the pure water reflux mode again. Based on this, in one embodiment, Figure 6 On the basis of Figure 7 As shown, a flow chart of restarting the pure water reflux mode based on the post-reflux standby time after stopping the pure water reflux mode is provided, which mainly includes the following steps:

[0120] When the pure water reflux mode is stopped, step 702 is executed to obtain the difference in water quality after reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element.

[0121] Optionally, when the water purification device is controlled to stop operating in the pure water reflow mode, the controller may obtain a water quality value representing the water quality on the concentrated water side of the filter element through a water quality detection device for detecting the water quality on the concentrated water side of the filter element, and obtain a water quality value representing the water quality on the pure water side of the filter element through a water quality detection device for detecting the water quality on the pure water side of the filter element, thereby obtaining a water quality difference after reflow. The post-reflow water quality difference between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element is calculated as follows: the water quality value of the concentrated water side of the filter element at the end of the pure water reflow minus the water quality value of the pure water side of the filter element at the end of the pure water reflow.

[0122] Step 704: Determine the post-backflow standby time based on the post-backflow water quality difference.

[0123] Optionally, the controller can determine the standby time after reflux that matches the water quality difference after reflux based on a pre-configured rule, that is, the standby time after reflux can be determined intelligently and flexibly based on the water quality when the pure water reflux mode just ends under actual working conditions.

[0124] While controlling the water purification device to stop the pure water reflux mode, the controller will time the standby time after stopping the pure water reflux mode. When the standby time after stopping the pure water reflux mode reaches the post-reflux standby time, step 706 is executed to run the pure water reflux mode, and then the process returns to step 602. If the standby time after stopping the pure water reflux mode does not reach the post-reflux standby time, step 708 is executed to control the water purification device to maintain the standby state until the standby time after stopping the pure water reflux mode reaches the post-reflux standby time.

[0125] In this embodiment, the standby time for running the pure water reflux mode again after the pure water reflux mode ends can be determined based on the actual water quality after the pure water reflux mode ends (the concentrated water side of the filter element refers to the difference in water quality after reflux between the concentrated water side of the filter element and the pure water side of the filter element), so that the pure water reflux mode can be started in a timely and accurate manner subsequently, thereby effectively improving the desalination rate of the first cup of water.

[0126] In one embodiment, Figure 8 As shown, a flow chart of determining the standby time after reflux based on the water quality difference after reflux is provided, which mainly includes the following steps:

[0127] Step 802 : obtaining a plurality of post-reflux water quality difference intervals and a second mapping relationship between the standby time for running the pure water reflux mode after the pure water reflux is completed and the post-reflux water quality difference intervals.

[0128] The obtained multiple post-reflow water quality difference intervals and the second mapping relationship match the model of the reverse osmosis membrane filter element installed in the water purification equipment. The second mapping relationship is: each post-reflow water quality difference interval is mapped to which standby time duration. If the second mapping relationship includes C mapping to D, then C is one of the multiple post-reflow water quality difference intervals, and D is one of the multiple standby time durations for running the pure water reflow mode after the pure water reflow ends.

[0129] Optionally, the controller stores a plurality of pre-established post-reflow water quality difference intervals and a second mapping relationship between the standby time and the post-reflow water quality difference intervals. The standby time here refers to the standby time for operating the pure water reflow mode after the pure water reflow ends. Based on this, after determining the post-reflow water quality difference at the end of the pure water reflow, the controller can obtain the plurality of post-reflow water quality difference intervals and the second mapping relationship from the stored data.

[0130] It should be noted that regarding how to determine multiple post-reflux water quality difference intervals and the second mapping relationship: considering that there are multiple models of reverse osmosis membrane filter elements, for each model of reverse osmosis membrane filter element, testers can conduct multiple rounds of testing in advance to obtain multiple post-reflux water quality difference intervals and the second mapping relationship corresponding to each model of reverse osmosis membrane filter element. For example, for a reverse osmosis membrane filter element of model X, after the pure water reflux is completed, the water salt ion increase rate corresponding to the pure water side under the water salt ion concentration difference between the concentrated water side and the pure water side can be tested, and based on the test data, multiple water salt ion concentration difference intervals can be obtained, that is, multiple post-reflux water quality difference intervals corresponding to the X model reverse osmosis membrane filter element are obtained, so that the water salt ion increase rates corresponding to the water salt ion concentration difference belonging to the same post-reflux water quality difference interval are close. Furthermore, for each post-reflux water quality difference interval, the tester can test how long the standby time is before restarting the pure water reflux mode to maximize the improvement of the first cup of water, thereby obtaining the standby time mapped for each post-reflux water quality difference interval, and then constructing a second mapping relationship for the X-type reverse osmosis membrane filter element. Similarly, the tester can determine the multiple post-reflux difference intervals and the second mapping relationship corresponding to each model of reverse osmosis membrane filter element through laboratory testing. For each water purification equipment, when installing the equipment, the second mapping relationship and multiple post-reflux difference intervals corresponding to the model of the reverse osmosis membrane filter element installed in the water purification equipment can be stored in the controller of the water purification equipment according to the model of the reverse osmosis membrane filter element so that the controller can obtain them.

[0131] Step 804 : Determine a post-reflow standby time that matches the post-reflow water quality difference according to the second mapping relationship and the post-reflow water quality difference interval to which the post-reflow water quality difference belongs.

[0132] Optionally, after determining the post-reflux water quality difference at the end of pure water reflux, the controller can first determine the target post-reflux water quality difference interval to which the post-reflux water quality difference belongs, and then determine the post-reflux standby time mapped by the target post-reflux water quality difference interval by querying the second mapping relationship, and use the post-reflux standby time mapped by the target post-reflux water quality difference interval as the post-reflux standby time matching the post-reflux water quality difference.

[0133] In this embodiment, the standby time for running the pure water reflux mode after the pure water reflux is completed can be determined based on the difference in water quality after reflux (the difference in water salt ion concentration between the concentrated water side and the pure water side) at the end of the pure water reflux under actual working conditions, rather than executing the pure water reflux mode according to pre-set fixed parameters as in traditional technology. This is conducive to restarting the pure water reflux mode in a timely and accurate manner after the pure water reflux is completed, thereby more effectively improving the desalination rate of the first cup of water.

[0134] Based on this, taking the case where multiple water quality difference intervals after reflux include: a fourth water quality difference interval, a fifth water quality difference interval, and a sixth water quality difference interval, the fourth water quality difference interval is [third preset value, +∞), the fifth water quality difference interval is (fourth preset value, third preset value), and the sixth water quality difference interval is (0, fourth preset value) as an example, in a possible embodiment, as Figure 9 As shown, step 804 also includes:

[0135] If the water quality difference after reflux is greater than or equal to the third preset value, execute step 902 to determine whether the water quality difference after reflux belongs to the fourth water quality difference interval, and use the fourth standby time mapped by the fourth water quality difference interval in the second mapping relationship as the standby time after reflux that matches the water quality difference after reflux.

[0136] If the water quality difference after reflux is greater than the fourth preset value and less than the third preset value, execute step 904 to determine that the water quality difference after reflux belongs to the fifth water quality difference interval, and use the fifth standby time mapped by the fifth water quality difference interval in the second mapping relationship as the standby time after reflux; the fifth standby time is greater than the fourth standby time.

[0137] If the water quality difference after reflux is less than or equal to the fourth preset value, execute step 906 to determine that the water quality difference after reflux belongs to the sixth water quality difference interval, and use the sixth standby time mapped by the sixth water quality difference interval in the second mapping relationship as the standby time after reflux; the sixth standby time is greater than the fifth standby time.

[0138] Exemplarily, taking the third preset value as TDS3 and the fourth preset value as TDS4, then TDS3 > TDS4. The fourth water quality difference interval [TDS3, +∞) corresponds to the standby duration T4, the fifth water quality difference interval (TDS4, TDS3) corresponds to the standby duration T5, and the sixth water quality difference interval (0, TDS4] corresponds to the standby duration T6, and T4 < T5 < T6. Among them, if the water quality difference after reflux belongs to the fourth water quality difference interval, it indicates that the concentration difference between the two sides of the membrane is relatively large during the static process after pure water reflux, and the penetration rate of water and salt ions (inorganic salt components) from the concentrated water side through the membrane into the pure water side is relatively fast, and it is necessary to quickly start pure water reflux again. If the water quality difference before reflux belongs to the fifth water quality difference interval, at this time, during the static process after pure water reflux, the penetration rate of water and salt ions is slower than when the water quality difference after reflux belongs to the fourth water quality difference interval, so T4 < T5. If the water quality difference after reflux belongs to the sixth water quality difference interval, at this time, during the static process after pure water reflux, the penetration rate of water and salt ions is slower than when the water quality difference after reflux belongs to the fifth water quality difference interval, and the pure water reflux mode can be run again after a longer time, so T4 < T5 < T6.

[0139] In this embodiment, the standby duration for running the pure water reflux mode after the end of pure water reflux under actual working conditions can be determined according to the water quality difference after reflux at the end of pure water reflux, so as to run the pure water reflux mode in a timely and accurate manner subsequently, thereby effectively improving the desalination rate of the first glass of water.

[0140] In a detailed embodiment, on the basis of Figure 3 as Figure 10 shown, a flow schematic diagram for controlling the pure water reflux mode of the water purification device based on actual working conditions is provided, which mainly includes the following processes:

[0141] (1) After controlling the water purification device to start, the controller can first control the water purification device to be in the standby state. When the controller receives the instruction to start the water production mode, the controller can control the water purification device to run the water production mode; otherwise, the controller controls the water purification device to maintain the standby state.

[0142] [[ID= sixteen]] (2) When it is detected that the water production ends, the controller can control the water purification device to be in the standby state, and through the water quality detection device, obtain the water quality value representing the water quality of the concentrated water side of the reverse osmosis membrane filter element and the water quality value representing the water quality of the pure water side of the filter element, so as to determine the water quality difference before reflux between the concentrated water side water quality and the pure water side water quality of the filter element. Further, the controller can determine the standby duration before reflux matching the water quality difference before reflux according to the pre-configured determination rule for the standby duration before reflux, so as to judge whether the standby duration after water production ends reaches the standby duration before reflux. If it reaches, the controller controls the water purification device to run the pure water reflux mode; if it does not reach, the controller controls the water purification device to maintain the standby state.

[0143] (3) During the operation of the pure water return mode, the controller can obtain the water quality collection interval duration, and thus obtain the water quality change of the concentrated water side of the filter element according to the water quality collection interval duration. If the water quality change obtained at any time is less than or equal to the change threshold, the pure water return mode is stopped; otherwise, the water purification equipment is controlled to continue to operate in the pure water return mode.

[0144] (4) After stopping the pure water reflux mode, the controller can control the water purification device to be in a standby state, and obtain the water quality value representing the concentrated water side of the filter element and the water quality value representing the pure water side of the filter element through the water quality detection device, thereby determining the difference in water quality after reflux between the concentrated water side of the filter element and the pure water side of the filter element. Furthermore, the controller can determine the post-reflux standby time that matches the post-reflux water quality difference according to the pre-configured post-reflux standby time determination rule, thereby judging whether the standby time after the pure water reflux ends reaches the post-reflux standby time. If so, the controller controls the water purification device to operate the pure water reflux mode; if not, the controller controls the water purification device to maintain the standby state.

[0145] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0146] Based on the various embodiments of the above-mentioned water purification equipment control method, the present application also provides a water purification equipment for executing the above-mentioned water purification equipment control method, wherein the water purification equipment includes:

[0147] The reverse osmosis membrane filter element is provided with a raw water inlet, a concentrated water outlet, a pure water outlet and a pure water return port;

[0148] A concentrated water branch is connected to the concentrated water outlet and is provided with a first water quality detection device for detecting the water quality on the concentrated water side of the reverse osmosis membrane filter element;

[0149] A pure water branch, the pure water branch is connected to the pure water outlet, and a second water quality detection device for detecting the water quality on the pure water side of the reverse osmosis membrane filter element is provided on the pure water branch;

[0150] A pure water reflux branch, one end of which is connected to the pure water reflux port, and the other end is connected to the raw water inlet;

[0151] The controller controls the conduction state of the pure water reflux branch by executing the above-mentioned water purification equipment control method to control the operating state of the pure water reflux mode in the water purification equipment.

[0152] For example, Figure 11 As shown, a schematic diagram of the structure of the water purification device is provided, wherein the water purification device is provided with: a raw water branch 1101, the raw water branch 1101 is connected to the raw water inlet of the reverse osmosis membrane filter element 1102; a concentrated water branch 1103, the concentrated water branch 1103 is connected to the concentrated water outlet of the reverse osmosis membrane filter element 1102, and the concentrated water branch 1103 is provided with a first water quality detection device 1104 for detecting the water quality of the concentrated water side of the filter element, and a device for controlling the conduction of the concentrated water branch The electromagnetic valve 1105 of the state; the pure water branch 1106, the pure water branch 1106 is connected to the pure water outlet of the reverse osmosis membrane filter element 1102, and the pure water branch 1106 is provided with a second water quality detection device 1107 for detecting the water quality of the pure water side of the filter element; the pure water return branch 1108, one end of the pure water return branch 1108 is connected to the pure water return port of the reverse osmosis membrane filter element 1102, and the other end is connected to the raw water inlet of the reverse osmosis membrane filter element 1102. Figure 11 Not shown in the figure.

[0153] When the above-mentioned water purification equipment operates in the pure water reflux mode, the pure water produced by the pure water reflux port can be returned to the raw water inlet through the pure water reflux branch, thereby effectively reducing the water salt ion concentration (water quality value) of the raw water side water and improving the first cup of water. On this basis, by executing the above-mentioned water purification equipment control method, the parameters for executing the pure water reflux mode can be intelligently adjusted in combination with the water salt ion concentration under actual working conditions, rather than executing the pure water reflux mode according to pre-set fixed parameters as in traditional technology, thereby effectively improving the desalination rate of the first cup of water.

[0154] In some embodiments, a check valve and a water inlet valve can also be provided in the pure water reflux branch. When the water purification equipment is in pure water reflux mode, the water inlet valve is turned on, and the pure water produced by the reverse osmosis membrane filter flows from the pure water reflux port through the check valve and then flows into the raw water inlet. Figure 11 On the basis of Figure 12 As shown, a check valve 1109 and a water inlet valve 1110 are provided in the pure water return branch 1108. The check valve 1109 is a valve used to control the unidirectional flow of fluid, and the water inlet valve 1110 can be a solenoid valve whose conduction state is controlled by a controller. In the pure water return mode, the water inlet valve 1110 is conductive, and in the water production mode, the water inlet valve 1110 is closed.

[0155] In some embodiments, a pressure-stabilizing pump may be provided on the raw water branch of the reverse osmosis membrane filter element, such as Figure 13 As shown, when operating in water production mode, the pressure-stabilizing pump 1111 can be used to stabilize the water pressure of the raw water flowing into the raw water inlet, and when operating in pure water reflux mode, the pressure-stabilizing pump 1111 can be used to stabilize the water pressure of the mixed water flowing into the raw water inlet.

[0156] Based on the same inventive concept, the present application also provides a water purification equipment control device for implementing the aforementioned water purification equipment control method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more water purification equipment control device embodiments provided below can be found in the above-mentioned limitations of the water purification equipment control method and will not be repeated here.

[0157] In one embodiment, Figure 14 As shown, a water purification equipment control device is provided, including: a water quality difference acquisition module 1402 before reflux, a standby time determination module 1404 before reflux, and a pure water reflux mode stop module 1406, wherein:

[0158] The module for obtaining the difference in water quality before reflux is used to obtain the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element when the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production;

[0159] The module for determining the standby time before reflux is used to determine the standby time before reflux based on the water quality difference before reflux. When the standby time after the water production is completed reaches the standby time before reflux, the pure water reflux mode is operated;

[0160] The pure water reflux mode stop module is used to obtain the water quality collection interval duration during the operation of the pure water reflux mode, and obtain the water quality change of the concentrated water side of the filter element according to the water quality collection interval duration. When the water quality change obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped.

[0161] The above-mentioned water purification equipment control device can obtain the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element under actual operating conditions when the water purification equipment equipped with a reverse osmosis membrane filter element has completed water production, thereby determining the pre-reflux standby time based on the pre-reflux water quality difference under actual operating conditions. When the standby time after the completion of water production reaches the pre-reflux standby time, the pure water reflux mode is operated. During the operation of the pure water reflux mode, the water quality collection interval is obtained, and the water quality change of the concentrated water side of the filter element under actual operating conditions is obtained according to the water quality collection interval. When the water quality change under actual operating conditions obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped. During the entire control process, the parameters for executing the pure water reflux mode can be intelligently adjusted based on the water salt ion concentration (water quality value) under actual working conditions. For example, based on the water quality value under actual working conditions, the standby time before reflux and whether to stop the pure water reflux mode can be determined, instead of executing the pure water reflux mode according to pre-set fixed parameters as in traditional technology, thereby effectively improving the desalination rate of the first cup of water.

[0162] In one embodiment, the module for determining the standby time before reflux is also used to: obtain multiple water quality difference intervals before reflux, and a first mapping relationship between the standby time for running the pure water reflux mode after water production is completed and the water quality difference interval before reflux; determine the standby time before reflux that matches the water quality difference before reflux based on the first mapping relationship and the water quality difference interval before reflux to which the water quality difference before reflux belongs.

[0163] In one embodiment, the module for determining the standby time before backflow is also used to: if the water quality difference before backflow is greater than or equal to the first preset value, determine that the water quality difference before backflow belongs to the first water quality difference interval, and use the first standby time mapped by the first water quality difference interval in the first mapping relationship as the standby time before backflow that matches the water quality difference before backflow; if the water quality difference before backflow is greater than the second preset value and less than the first preset value, determine that the water quality difference before backflow belongs to the second water quality difference interval, and use the second standby time mapped by the second water quality difference interval in the first mapping relationship as the standby time before backflow; the second standby time is greater than the first standby time; if the water quality difference before backflow is less than or equal to the second preset value, determine that the water quality difference before backflow belongs to the third water quality difference interval, and use the third standby time mapped by the third water quality difference interval in the first mapping relationship as the standby time before backflow; the third standby time is greater than the second standby time.

[0164] In one embodiment, the pure water reflux mode stop module is further used to: take the time point when the pure water reflux mode is started as the starting time point, and starting from the starting time point, extract the concentrated water side water quality value that characterizes the water quality of the concentrated water side of the filter element every time the water quality collection interval is reached; determine the water quality value difference between the extracted concentrated water side water quality value and the concentrated water side water quality value extracted last time, and use the water quality value difference as the water quality change of the concentrated water side of the filter element.

[0165] In one embodiment, the water purification equipment control device method also includes a post-reflux standby time determination module, which is used to: when the pure water reflux mode is stopped, obtain the post-reflux water quality difference between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element; determine the post-reflux standby time based on the post-reflux water quality difference, and when the standby time after stopping the pure water reflux mode reaches the post-reflux standby time, run the pure water reflux mode.

[0166] In one embodiment, the module for determining the standby time after reflux is further used to: obtain multiple water quality difference intervals after reflux, and a second mapping relationship between the standby time for running the pure water reflux mode after the pure water reflux is completed and the water quality difference interval after reflux; determine the standby time after reflux that matches the water quality difference after reflux based on the second mapping relationship and the water quality difference interval after reflux to which the water quality difference after reflux belongs.

[0167] In one embodiment, the module for determining the standby time after reflux is also used to: if the water quality difference after reflux is greater than or equal to the third preset value, determine that the water quality difference after reflux belongs to the fourth water quality difference interval, and use the fourth standby time mapped by the fourth water quality difference interval in the second mapping relationship as the standby time after reflux that matches the water quality difference after reflux; if the water quality difference after reflux is greater than the fourth preset value and less than the third preset value, determine that the water quality difference after reflux belongs to the fifth water quality difference interval, and use the fifth standby time mapped by the fifth water quality difference interval in the second mapping relationship as the standby time after reflux; the fifth standby time is greater than the fourth standby time; if the water quality difference after reflux is less than or equal to the fourth preset value, determine that the water quality difference after reflux belongs to the sixth water quality difference interval, and use the sixth standby time mapped by the sixth water quality difference interval in the second mapping relationship as the standby time after reflux; the sixth standby time is greater than the fifth standby time.

[0168] Each module in the above-mentioned water purification equipment control device can be implemented in whole or in part through software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of the processor of the computer device in hardware form, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the corresponding operations of each of the above modules.

[0169] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 15 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store water purification equipment control data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a water purification equipment control method is implemented.

[0170] Those skilled in the art will understand that Figure 15 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0171] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0172] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0173] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0174] It should be noted that the information (including but not limited to device information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions.

[0175] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), data processing logic devices based on quantum computing, and the like.

[0176] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0177] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A water purification equipment control method, characterized in that: The method comprises: When the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production, the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element is obtained; Determine the pre-reflux standby time according to the pre-reflux water quality difference, and operate the pure water reflux mode when the standby time after the water production is completed reaches the pre-reflux standby time; During the operation of the pure water reflux mode, the water quality collection interval duration is obtained, and the water quality change of the water quality on the concentrated water side of the filter element is obtained according to the water quality collection interval duration. When the water quality change obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped.

2. The method according to claim 1, characterized in that The step of determining the standby time before reflux according to the water quality difference before reflux includes: Obtaining a first mapping relationship between a plurality of pre-reflow water quality difference intervals and a standby time for running a pure water reflow mode after water production is completed and the pre-reflow water quality difference intervals; According to the first mapping relationship and the pre-reflow water quality difference interval to which the pre-reflow water quality difference belongs, a pre-reflow standby time length that matches the pre-reflow water quality difference is determined.

3. The method according to claim 2, characterized in that The determining, based on the first mapping relationship and the pre-reflow water quality difference interval to which the pre-reflow water quality difference belongs, a pre-reflow standby time period that matches the pre-reflow water quality difference, includes: If the pre-backflow water quality difference is greater than or equal to a first preset value, determining that the pre-backflow water quality difference belongs to a first water quality difference interval, and using the first standby time mapped to the first water quality difference interval in the first mapping relationship as the pre-backflow standby time matching the pre-backflow water quality difference; If the water quality difference before backflow is greater than a second preset value and less than the first preset value, determining that the water quality difference before backflow belongs to a second water quality difference interval, and using a second standby time mapped to the second water quality difference interval in the first mapping relationship as the standby time before backflow; the second standby time is greater than the first standby time; If the water quality difference before backflow is less than or equal to the second preset value, it is determined that the water quality difference before backflow belongs to the third water quality difference interval, and the third standby time mapped by the third water quality difference interval in the first mapping relationship is used as the standby time before backflow; the third standby time is greater than the second standby time.

4. The method according to claim 1, wherein The step of obtaining the water quality change of the concentrated water side of the filter element according to the water quality collection interval includes: The time point when the pure water reflux mode is started is used as the starting time point. Starting from the starting time point, every time the water quality sampling interval is reached, the concentrated water side water quality value representing the water quality of the concentrated water side of the filter element is extracted; The water quality difference between the extracted concentrated water side water quality value and the concentrated water side water quality value extracted last time is determined, and the water quality difference is used as the water quality change of the concentrated water side water quality of the filter element.

5. The method according to claim 1, wherein The method further comprises: When the pure water reflux mode is stopped, the difference in water quality after reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element is obtained; The standby time after reflux is determined according to the water quality difference after reflux. When the standby time after stopping the pure water reflux mode reaches the standby time after reflux, the pure water reflux mode is operated.

6. The method according to claim 5, characterized in that The determining of the post-backflow standby time according to the post-backflow water quality difference includes: Acquire a plurality of post-reflux water quality difference intervals, and a second mapping relationship between the standby time for running the pure water reflux mode after pure water reflux is completed and the post-reflux water quality difference intervals; According to the second mapping relationship and the post-reflux water quality difference interval to which the post-reflux water quality difference belongs, a post-reflux standby time length that matches the post-reflux water quality difference is determined.

7. The method according to claim 6, characterized in that The determining, based on the second mapping relationship and the post-reflow water quality difference interval to which the post-reflow water quality difference belongs, a post-reflow standby time period that matches the post-reflow water quality difference, includes: If the post-reflow water quality difference is greater than or equal to a third preset value, determining that the post-reflow water quality difference belongs to a fourth water quality difference interval, and using the fourth standby time mapped to the fourth water quality difference interval in the second mapping relationship as the post-reflow standby time matching the post-reflow water quality difference; If the post-reflow water quality difference is greater than the fourth preset value and less than the third preset value, determining that the post-reflow water quality difference belongs to a fifth water quality difference interval, and using a fifth standby time mapped to the fifth water quality difference interval in the second mapping relationship as the post-reflow standby time; the fifth standby time is greater than the fourth standby time; If the water quality difference after reflux is less than or equal to the fourth preset value, it is determined that the water quality difference after reflux belongs to the sixth water quality difference interval, and the sixth standby time mapped by the sixth water quality difference interval in the second mapping relationship is used as the standby time after reflux; the sixth standby time is greater than the fifth standby time.

8. A water purification device, characterized in that: The water purification equipment includes: A reverse osmosis membrane filter element, wherein the reverse osmosis membrane filter element is provided with a raw water inlet, a concentrated water outlet, a pure water outlet and a pure water return port; a concentrated water branch, the concentrated water branch being connected to the concentrated water outlet and provided with a first water quality detection device for detecting the water quality on the concentrated water side of the reverse osmosis membrane filter element; A pure water branch, the pure water branch being connected to the pure water outlet and provided with a second water quality detection device for detecting the water quality on the pure water side of the reverse osmosis membrane filter element; A pure water reflux branch, one end of which is connected to the pure water reflux port, and the other end of which is connected to the raw water inlet; A controller, wherein the controller controls the conduction state of the pure water reflux branch by executing the water purification equipment control method described in any one of claims 1 to 7 to control the operating state of the pure water reflux mode in the water purification equipment.

9. The water purification device according to claim 8, characterized in that: The pure water reflux branch is provided with a check valve and a water inlet valve; When the water purification equipment operates in the pure water reflux mode, the water inlet valve is turned on, and the pure water produced by the reverse osmosis membrane filter element flows from the pure water reflux port through the check valve and then flows into the raw water inlet.

10. A water purification equipment control device, characterized in that: The device comprises: The module for obtaining the difference in water quality before reflux is used to obtain the difference in water quality before reflux between the water quality on the concentrated water side of the filter element and the water quality on the pure water side of the filter element when the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production; A module for determining the standby time before reflux, for determining the standby time before reflux according to the water quality difference before reflux, and for operating the pure water reflux mode when the standby time after the water production is completed reaches the standby time before reflux; The pure water reflux mode stop module is used to obtain the water quality collection interval duration during the operation of the pure water reflux mode, and obtain the water quality change of the water quality on the concentrated water side of the filter element according to the water quality collection interval duration. When the water quality change obtained at any time is less than or equal to the change threshold, the pure water reflux mode is stopped.

11. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

13. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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