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

Abstract

The invention relates to a water purification equipment control method and device, computer equipment, a storage medium, a computer program product and water purification equipment. The method comprises the following steps: when the water purification equipment equipped with a reverse osmosis membrane filter element finishes water preparation, obtaining a water quality difference value between water quality of a filter element concentrated water side and water quality of a filter element pure water side before backflow; according to the water quality difference value before backflow, the standby time length before backflow is determined, and when the standby time length after water production is finished reaches the standby time length before backflow, the pure water backflow mode is operated; and in the process of operating the pure water backflow mode, acquiring the water quality acquisition interval duration, acquiring the water quality variation of the water quality at the concentrated water side of the filter element according to the water quality acquisition interval duration, and stopping operating the pure water backflow mode when the water quality variation acquired at any time is smaller than or equal to the variation threshold value. The 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 development of water purification technology, reverse osmosis membranes designed based on reverse osmosis technology are usually used as filter elements for water purification equipment. During the static standby process after the water production of water purification equipment equipped with reverse osmosis membrane filter elements, the reverse osmosis membrane filter elements are in a state of being soaked in water. Since the water salt ion concentration (water quality value) on the pure water side of the reverse osmosis membrane filter element is lower than the water salt ion concentration (water quality value) on the raw water side / concentrated water side, under the action of osmotic pressure, the water salt ions on the raw water side / concentrated water side have the tendency to penetrate into the pure water side. The longer the static time, the more water salt ions will penetrate. If water is produced again after a period of static standing, the water salt ion concentration of the first cup of water will be high and the desalination rate will be low because the first cup of water is mixed with pure water that has already penetrated water salt ions.

[0003] In traditional technology, in order to improve the first cup of water, a pure water reflux branch is usually set between the raw water inlet and the pure water outlet of the reverse osmosis membrane filter element, so that the pure water can be refluxed to the raw water side and mixed with the raw water through the pure water reflux mode, so that the water-salt ion concentration of the raw water / concentrated water obtained by concentrating the raw water decreases, thereby effectively reducing the water-salt ion concentration difference between the pure water side and the raw water side / concentrated water side when standing still, thereby reducing the water-salt ion diffusion rate on both sides of the reverse osmosis membrane when standing still, and improving the first cup of water produced after standing still for a period of time. However, in traditional technology, when controlling the operation of the pure water reflux mode of the water purification equipment, it is usually executed according to pre-set fixed parameters, and it is impossible to intelligently adjust the parameters of the pure water reflux mode in combination with 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. 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 controlling the pure water reflux mode of the water purification equipment in the traditional technology, the parameters of the pure water reflux mode cannot be intelligently adjusted according to 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 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 is obtained;

[0007] According to the water quality difference before reflux, the standby time before reflux is determined. When the standby time after 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 duration 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 duration. When any 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 according to the water quality difference before backflow includes:

[0010] Acquire a plurality of water quality difference intervals before reflow, and a first mapping relationship between the standby time of running the pure water reflow mode after water production is completed and the water quality difference intervals before reflow;

[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 matching the pre-reflow water quality difference is determined.

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

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

[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, the water quality change amount of the concentrated water side of the filter element is obtained according to the water quality collection interval, including:

[0017] The time point when the pure water reflux mode is started is taken 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 characterizing the water quality of the concentrated water side of the filter element is extracted;

[0018] 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 is determined, and the water quality value difference is used as the water quality change amount 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 the backflow according to the water quality difference after the backflow includes:

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

[0024] According to 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 length that matches the post-reflow water quality difference is determined.

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

[0026] If the water quality difference after the return flow is greater than or equal to the third preset value, it is determined that the water quality difference after the return flow belongs to the fourth water quality difference interval, and the fourth standby time mapped by the fourth water quality difference interval in the second mapping relationship is used as the standby time after the return flow that matches the water quality difference after the return flow;

[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 by 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 reflow is less than or equal to the fourth preset value, it is determined that the water quality difference after reflow 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 reflow; 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 according to the water quality difference before reflux. When the standby time after the water production ends 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 any 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, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0034] When the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production, 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 is obtained;

[0035] According to the water quality difference before reflux, the standby time before reflux is determined. When the standby time after 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 duration 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 duration. When any 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. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0038] When the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production, 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 is obtained;

[0039] According to the water quality difference before reflux, the standby time before reflux is determined. When the standby time after 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 duration 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 duration. When any 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, and when the computer program is executed by a processor, the following steps are implemented:

[0042] When the water purification equipment equipped with the reverse osmosis membrane filter element finishes water production, 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 is obtained;

[0043] According to the water quality difference before reflux, the standby time before reflux is determined. When the standby time after 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 duration 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 duration. When any 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 finished water production, thereby determining the standby time before reflux based on the difference in water quality before reflux under actual working conditions. When the standby time after the water production is completed reaches the standby time before reflux, 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 in combination with the water salt ion concentration (water quality value) under actual working conditions. For example, the standby time before reflux and whether to stop the pure water reflux mode can be determined in combination with the water quality value under actual working conditions, 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 also 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 reflux outlet;

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

[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, so as to control the operating state of the pure water reflux mode in the water purification equipment.

[0052] In one of the embodiments, 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 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 concentrate water outlet, a pure water outlet and a pure water reflux port; a concentrate water branch, which is connected to the concentrate water outlet and is provided with a first water quality detection device for detecting the water quality on the concentrate water side of the filter element 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 on the pure water side of the filter element 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 port, 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 is running 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is an application environment diagram of a water purification equipment control method according to an embodiment;

[0056] FIG2 is a schematic flow chart of a method for controlling a water purification device in one embodiment;

[0057] FIG3 is a schematic diagram of a process of intelligently controlling a water purification device to operate in a pure water reflux mode in combination with actual working conditions in one embodiment;

[0058] FIG4 is a schematic diagram of a process for determining the pre-backflow standby time according to the pre-backflow water quality difference in one embodiment;

[0059] FIG5 is a schematic diagram of a process for determining the pre-backflow standby time according to the pre-backflow water quality difference in another embodiment;

[0060] FIG6 is a schematic diagram of a process for obtaining the water quality change amount of the concentrated water side of the filter element according to the water quality collection interval in one embodiment;

[0061] 7 is a schematic diagram of a process 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] FIG8 is a schematic diagram of a process for determining the standby time after reflux according to the water quality difference after reflux in one embodiment;

[0063] FIG9 is a schematic diagram of a process for determining the standby time after reflux according to the water quality difference after reflux in another embodiment;

[0064] FIG10 is a schematic diagram of a process for controlling a water purification device to operate in a pure water reflux mode based on actual working conditions in one embodiment;

[0065] FIG11 is a schematic diagram of the structure of a water purification device in one embodiment;

[0066] FIG12 is a schematic structural diagram of a water purification device in which a check valve and a water inlet valve are provided in a pure water reflux branch in one embodiment;

[0067] FIG13 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] FIG14 is a block diagram of a water purification equipment control device in one embodiment;

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

[0070] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0071] The water purification equipment control method provided in the embodiment of the present application can be applied to the application environment shown in Figure 1. 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 production of the water purification equipment 100 equipped with the reverse osmosis membrane filter element 104 is completed, the controller 102 can further obtain the water quality difference before reflux between the water quality of the concentrated water side of the filter element of the reverse osmosis membrane filter element 104 and the water quality of the pure water side of the filter element, thereby determining the standby time before reflux according to the water quality difference before reflux. When the standby time after the water production is completed reaches the standby time before reflux, the controller 102 can control the water purification equipment 100 to run the pure water reflux mode. In the process of running 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 acquired 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 reflux mode.

[0072] Among them, the water purification device 100 is a device for removing impurities and harmful substances in water and improving water quality to meet specific purposes (such as drinking). The controller 102 is the core component of the water purification device 100, which can control the water purification device 100 to run different modes. Its working principle is: receiving input signals, issuing control instructions after internal logic processing, so as to realize automatic control of the device or system. The reverse osmosis membrane in the reverse osmosis membrane filter element 104 is an artificial semipermeable membrane made by simulating biological semipermeable membranes, so that the reverse osmosis membrane filter element 104 can effectively filter dissolved salts, colloids, microorganisms, etc. in water. In this embodiment, the reverse osmosis membrane filter element 104 can be provided 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 the tap water pipeline, the concentrated water outlet is used to discharge the concentrated water produced after filtering the raw water, and the pure water outlet can be used to connect to the faucet so that the user can obtain the pure water (clean 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 pipeline. 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 shell 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, as shown in FIG. 2 , a water purification equipment control method is provided, which is described by taking the method applied to the controller 102 in FIG. 1 as an example, and includes 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] Among them, the water purification equipment is also equipped with multiple water quality detection devices, at least one water quality detection device is used to detect the water quality of the concentrated water side of the filter element of the reverse osmosis membrane filter element, and at least one water quality detection device is used to detect the water quality of the pure water side of the filter element. The water quality of the concentrated water side of the filter element is specifically: the water-salt ion concentration of the concentrated water produced from the concentrated water outlet of the reverse osmosis membrane filter element, and the water quality of the pure water side of the filter element is specifically: the water-salt ion concentration of the pure water produced from the pure water outlet of the reverse osmosis membrane filter element. The concentrated water on the concentrated water side of the filter element is obtained by concentrating the raw water on the raw water side. Therefore, the water quality of the concentrated water side of the filter element is positively correlated with the water quality of the raw water side of the filter element (the higher the water-salt ion concentration of the raw water, the higher the water-salt ion concentration of the concentrated water). In this embodiment, by measuring the water quality difference 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, the water-salt ion concentration difference between the pure water side and the raw water side / concentrated water side can be determined.

[0077] Optionally, during the water production process of the water purification equipment equipped with a reverse osmosis membrane filter element, the water quality detection device installed in the water purification equipment will detect 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 in real time, and the water quality detection device will feed back the real-time detected results to the controller. When the controller detects that the water production of the water purification equipment has ended, the controller can obtain the water quality value of the concentrated water side of the filter element and the water quality value of the pure water side of the filter element at the end of water production through the water quality detection device, thereby determining 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 at the end of water production.

[0078] Exemplarily, 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 = the water quality value of the water quality on the concentrated water side of the filter element at the end of water production - the water quality value of the water quality on the pure water side of the filter element at the end of water production. Among them, the concentrated water on the concentrated water side of the filter element is produced by concentrating the raw water, and there is a significant difference in water quality between it and the pure water on the pure water side of the filter element. Therefore, in this embodiment, the water quality value 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 selected as the water quality difference before reflux. 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 water salt ion concentration, which can also be called the TDS value. The TDS probe can be used to measure solid substances dissolved in water, such as minerals, salts, etc.

[0079] Step 204, determining the standby time before reflux according to the water quality difference before reflux, and running the pure water reflux mode when the standby time after the water production is completed reaches the standby time before reflux.

[0080] Optionally, the controller can determine the pre-reflow standby time that matches the pre-reflow water quality difference according to a pre-configured pre-reflow standby time determination rule, that is, the pre-reflow standby time can be determined intelligently and flexibly according to the water quality just after the water production is completed under actual working conditions. When the controller detects that the standby time after the water production is completed reaches the pre-reflow standby time, the controller 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 water production, 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 the reflux, the controller may control the water purification device to operate the pure water reflux mode. Alternatively, the controller has an automatic timing function. When the controller detects that the water purification device has finished water production, 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 purifier, 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 purifier to control the water purifier to operate in the water production mode, and 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 purifier to control the water purifier to operate in the pure water reflux mode.

[0083] Step 206, during the operation of the pure water reflow 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 any water quality change obtained at any time is less than or equal to the change threshold, stop the operation of the pure water reflow mode.

[0084] Among them, the water quality collection interval can be flexibly configured according to the actual collection needs, including but not limited to: 1 second, 2 seconds, 3 seconds, 5 seconds, etc. The change threshold can also be flexibly configured according to the actual collection needs. The water quality change is less than or equal to the change threshold, indicating that the water quality on the concentrated water side of the filter element (the water-salt ion concentration of the concentrated water on the concentrated water side) tends to be stable, and the pure water return can be stopped. That is, after the water purification equipment starts the pure water return, the water-salt ion concentration of the concentrated water on the concentrated water side will also decrease because the raw water on the raw water side is diluted by the returned pure water, but the dilution capacity of the returned pure water is limited (the pure water output is limited). During the pure water return process, the water-salt ion concentration of the concentrated water will slowly tend to a stable concentration. Therefore, if the water quality change on the concentrated water side of the filter element within the water quality collection interval is small enough (the change is less than or equal to the change threshold), it can be determined that the pure water return has reached the maximum degree of improvement that can be achieved, and the pure water 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 change in the water quality 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 change in water quality obtained at any time is less than or equal to the change threshold, the controller can control the water purification equipment to stop operating the pure water reflux mode, that is, it can intelligently control the end of a single pure water reflux based on the amount of change in the water quality 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 the pure water reflux mode, if the user uses the terminal device or triggers the water production mode start command by clicking the touch screen / button of the water purification equipment, the controller will control the water purification equipment to stop operating in the pure water reflux mode and start operating in the water production mode.

[0087] Based on the above steps 202 to 206, as shown in FIG3, a schematic flow chart of intelligently controlling the operation of the pure water reflux mode of the 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 a 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 a standby state.

[0089] (2) When it is detected that water production is finished, the controller can control the water purification equipment to be in standby mode, 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, so as to determine 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, so as to judge 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 mode.

[0090] (3) During the operation of the pure water reflux mode, the controller can obtain the water quality collection interval duration, and thereby 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 reflux mode. Otherwise, the water purification equipment is controlled to continue running the pure water reflux 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 working conditions when the water purification equipment equipped with a reverse osmosis membrane filter element has finished water production, thereby determining the standby time before reflux based on the difference in water quality before reflux under actual working conditions. When the standby time after the completion of water production reaches the standby time before reflux, 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 any water quality change under actual working conditions obtained at one 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 in combination with the water salt ion concentration (water quality value) under actual working conditions. For example, the standby time before reflux and whether to stop the pure water reflux mode can be determined in combination with the water quality value under actual working conditions, 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, as shown in FIG4 , a flow chart of determining the pre-backflow standby time according to the pre-backflow water quality difference is provided, which mainly includes the following steps:

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

[0094] Among them, the obtained multiple water quality difference intervals before reflux and the first mapping relationship match the model of the reverse osmosis membrane filter element equipped with the water purification equipment. The first mapping relationship is: to which standby time each water quality difference interval before reflux is mapped. If the first mapping relationship includes A mapping to B, then A is one of the multiple water quality difference intervals before reflux, and B is one of the multiple standby time lengths for running the pure water reflux mode after the water production is completed.

[0095] Optionally, the controller stores a plurality of pre-constructed water quality difference intervals before reflow, and a first mapping relationship between the standby time and the water quality difference interval before reflow, wherein the standby time here refers to the standby time of running the pure water reflow mode after the water production is completed. Based on this, after determining the water quality difference before reflow at the end of water production, the controller can obtain the plurality of water quality difference intervals before reflow 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, the tester can pre-perform multiple rounds of testing 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 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 pre-reflux water quality difference intervals corresponding to the X model reverse osmosis membrane filter element can be obtained, so that the water-salt ion increase rates corresponding to the water-salt ion concentration difference under 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 the 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 type of reverse osmosis membrane filter element through laboratory testing. For each water purification equipment, when installing the equipment, the first mapping relationship and 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 it.

[0097] Step 404 , determining a pre-reflow standby time length that matches the pre-reflow water quality difference value according to the first mapping relationship and the pre-reflow water quality difference value interval to which the pre-reflow water quality difference value 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 running the pure water return mode after the water production is completed can be determined according to the water quality difference before the return when the water production is completed under the actual working conditions (the difference in the water salt ion concentration between the concentrated water side and the pure water side), instead of executing the pure water return mode according to the pre-set fixed parameters as in the traditional technology. For example, in the traditional technology, the pure water return mode is usually executed after waiting for a fixed standby time after the water production is completed, and it is impossible to judge when to run the pure water return mode in combination with the actual working conditions. Compared with the traditional technology, in this embodiment, considering that the different degrees of water salt ion concentration difference under the actual working conditions will lead to different water salt ion penetration speeds, and thus lead to different pure water return requirements, the standby time for running the pure water return mode after the water production is completed can be determined in combination with the actual water quality difference before the return when the water production is completed, so that the pure water return mode can be started in a timely and accurate manner later, thereby more effectively improving the desalination rate of the first cup of water.

[0101] Based on this, taking the case where a plurality of 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 implementation, as shown in FIG5 , step 404 further includes:

[0102] If the water quality difference before backflow is greater than or equal to the first preset value, execute step 502 to 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.

[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 membrane of the reverse osmosis membrane filter element is large when the water production is finished, and the inorganic salt components have a strong tendency to penetrate from the concentrated water side through the membrane into the pure water side, and the pure water reflux needs to be started as soon as possible. If the water quality difference before reflux belongs to the first water quality difference interval, If the water quality difference value is in the second water quality difference value interval, it indicates that the concentration difference on both sides of the reverse osmosis membrane filter element is reduced when the water production is finished. This usually happens in winter when the water temperature is low or after the filter element has been used for a period of time. At this time, the pure water flow rate is reduced, the recovery rate of the water purification equipment is reduced, the inorganic salt concentration ratio on the concentrated water side of the reverse osmosis membrane is reduced, and the concentration difference on both sides of the membrane is reduced. After the water production is completed, the pure water reflux needs to be opened in time. Therefore, T2>T1. If the water quality difference before reflux belongs to the third water quality difference value interval, it indicates that the concentration difference on both sides of the reverse osmosis membrane filter element is small when the water production is finished, and the inorganic salt components have a small tendency to penetrate from the concentrated water side through the membrane into the pure water side. It can wait for a long time before opening the pure water reflux. Therefore, T3>T2>T1.

[0106] In this embodiment, the standby time of the pure water reflux mode after water production is completed can be determined based on the water quality difference before reflux when water production is completed 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 later, thereby effectively improving the desalination rate of the first cup of water.

[0107] In one embodiment, based on FIG. 2 , as shown in FIG. 6 , a flow chart of obtaining the water quality change amount 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 reflow 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 may pre-store a 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 a pure water reflux mode, thereby periodically obtaining the water quality value of the concentrated water side of the filter element through a water quality detection device on the concentrated water side of the filter element according to the water quality collection interval duration.

[0111] Step 604, taking the time point when the pure water reflow mode is started as the starting time point, starting from the starting time point, every time the water quality collection interval is reached, extracting the concentrated water side water quality value characterizing the concentrated water side water quality of the filter element.

[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 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, 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 obtain the water quality value TDS2 of the concentrated water side of the filter element at 9:00:05 after waiting for the water quality collection interval.

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

[0115] Optionally, each time the controller extracts a water quality value of the concentrate side, it calculates the water quality value difference between the extracted water quality value of the concentrate side and the water quality value of the concentrate side extracted last time, and uses the calculated water quality value difference as the water quality change of the concentrate 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, execute step 608 to stop running the pure water reflux mode, otherwise, return to step 604.

[0117] For example, taking the water quality collection interval as 5 seconds, 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 obtain the water quality value TDS2 of the concentrated water side of the filter element at 9:00:05, so as to use (TDS1-TDS2) as the water quality change of the concentrated water side of the filter element within 9:00:00~9:00:05. If (TDS1-TDS2) is greater than the change threshold, the controller can obtain the water quality value TDS3 of the concentrated water side of the filter element at 9:00:10, calculate and determine whether (TDS3-TDS2) is less than or equal to the change threshold, and if (TDS1-TDS2) is less than or equal to the change threshold, the controller can control the water purification equipment to stop running the pure water reflux mode. If (TDS3-TDS2) is greater than the change threshold, the concentrated water side water quality value TDS4 of the concentrated water side of the filter element is obtained at 9:00:15, and so on, until the calculated water quality change is less than or equal to the change threshold, the water purification equipment is controlled to stop running the pure water return mode. Among them, the water quality change of the concentrated water side is selected because: in the process of running the pure water return mode, the water quality change of the concentrated water side will be more obvious due to the dilution of the raw water.

[0118] In this embodiment, when the water purification equipment is running in the pure water return mode, it can be determined whether to stop the pure water return mode according to the change in the water quality value of the concentrated water side within each sampling interval, rather than just executing the pure water return mode according to the pre-set fixed parameters as in the traditional technology. Therefore, this implementation can intelligently determine whether it is necessary to stop a single pure water return by combining the actual working conditions, that is, intelligently adjust the duration of a single pure water return, improve the pure water return effect, and thus effectively improve the desalination rate of the first cup of water.

[0119] It can be 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, based on FIG6, as shown in FIG7, a flow chart of running the pure water reflux mode again after stopping the pure water reflux mode based on the standby time after reflux is provided, which mainly includes the following steps:

[0120] When the pure water reflow mode is stopped, step 702 is executed to obtain the difference in water quality after reflow 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 running the pure water reflux mode, the controller can obtain a water quality value characterizing 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 characterizing 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 reflux. Among them, the water quality difference 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 = the water quality value of the water quality on the concentrated water side of the filter element at the end of the pure water reflux - the water quality value of the water quality on the pure water side of the filter element at the end of the pure water reflux.

[0122] Step 704, determining the standby time after the backflow according to the water quality difference after the backflow.

[0123] Optionally, the controller can determine the standby time after reflux that matches the water quality difference after reflux according to a pre-configured rule for determining the standby time after reflux, that is, the standby time after reflux can be determined intelligently and flexibly according to 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 count the standby time after stopping the pure water reflux mode. When the standby time after stopping the pure water reflux mode reaches the standby time after reflux, step 706 is executed to run the pure water reflux mode, and then return to step 602. If the standby time after stopping the pure water reflux mode does not reach the standby time after reflux, 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 standby time after reflux.

[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 according to 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 promptly and accurately subsequently, thereby effectively improving the desalination rate of the first cup of water.

[0126] In one embodiment, as shown in FIG8 , a flow chart of determining the standby time after reflux according to 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] Among them, the obtained multiple post-reflux water quality difference intervals and the second mapping relationship match the model of the reverse osmosis membrane filter element equipped with the water purification equipment. The second mapping relationship is: to which standby time each post-reflux water quality difference interval is mapped. If the second mapping relationship includes C mapping to D, then C is one of the multiple post-reflux water quality difference intervals, and D is one of the multiple standby time lengths for running the pure water reflux mode after the pure water reflux ends.

[0129] Optionally, the controller stores a plurality of pre-constructed water quality difference intervals after reflux, and a second mapping relationship between the standby time and the water quality difference interval after reflux, wherein the standby time here refers to the standby time of running the pure water reflux mode after the pure water reflux ends. Based on this, after determining the water quality difference after reflux at the end of the pure water reflux, the controller can obtain the plurality of water quality difference intervals after reflux and the second mapping relationship from the stored data.

[0130] It should be noted that 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, the tester can pre-perform multiple rounds of testing 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 are 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 type 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 it.

[0131] Step 804: Determine 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.

[0132] Optionally, after determining the post-reflux water quality difference at the end of the 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 of the pure water reflux mode after the pure water reflux is completed can be determined according to the difference in water quality after reflux (the difference in water salt ion concentration between the concentrated water side and the pure water side) when the pure water reflux is completed under actual working conditions, instead of 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 a plurality of 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 implementation, as shown in FIG9 , step 804 further includes:

[0135] If the water quality difference after reflow is greater than or equal to the third preset value, execute step 902 to determine that the water quality difference after reflow 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 reflow that matches the water quality difference after reflow.

[0136] If the water quality difference after reflow 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 reflow 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 reflow; the fifth standby time is greater than the fourth standby time.

[0137] If the water quality difference after reflow is less than or equal to the fourth preset value, execute step 906 to determine that the water quality difference after reflow 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 reflow; 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 as an example, 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 standing process after the pure water reflux, and the penetration speed 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 the pure water reflux again. If the water quality difference before reflux belongs to the fifth water quality difference interval, at this time, during the standing process after the pure water reflux, the penetration speed 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 standing process after the pure water reflux, the penetration speed 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 of running the pure water reflux mode after the pure water reflux ends under the actual working conditions can be determined according to the water quality difference after reflux at the end of the 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, based on Figure 3, as shown in Figure 10, a schematic flow chart for controlling the pure water reflux mode of the water purification device based on the 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 water production mode start instruction, the controller can control the water purification device to run the water production mode; otherwise, control the water purification device to maintain the standby state.

[0142] (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 standby duration determination rule before reflux, so as to judge whether the standby duration after the water production ends reaches the standby duration before reflux. If it reaches, control the water purification device to run the pure water reflux mode; if it does not reach, control the water purification device to maintain the standby state.

[0143] (3) During the operation of the pure water reflux mode, the controller can obtain the water quality collection interval duration, and thereby 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 reflux mode is stopped; otherwise, the water purification equipment is controlled to continue to operate in the pure water reflux 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 characterizing the concentrated water side of the filter element and the water quality value characterizing the pure water side of the filter element through the water quality detection device, so as to determine 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 standby time after reflux that matches the difference in water quality after reflux according to the pre-configured standby time determination rule after reflux, so as to judge whether the standby time after the pure water reflux ends reaches the standby time after reflux. If so, the water purification device is controlled to run the pure water reflux mode. If not, the water purification device is controlled to maintain the standby state.

[0145] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed 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 part of the steps or stages in other steps.

[0146] Based on the various embodiments of the above-mentioned water purification equipment control method, the embodiment of the present application further 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 reflux outlet;

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

[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, so as to control the operating state of the pure water reflux mode in the water purification equipment.

[0152] For example, as shown in FIG11, a schematic diagram of the structure of a 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 first water quality detection device 1104 for controlling the concentrated water A solenoid valve 1105 in a branch conduction state; a 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 a second water quality detection device 1107 for detecting the water quality of the pure water side of the filter element is provided on the pure water branch 1106; a pure water reflux branch 1108, one end of the pure water reflux branch 1108 is connected to the pure water reflux 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. Among them, the controller is not shown in FIG. 11 .

[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 refluxed 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 may also be provided in the pure water reflux branch. When the water purification equipment is in the 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. Based on this, on the basis of Figure 11, as shown in Figure 12, a check valve 1109 and a water inlet valve 1110 are provided in the pure water reflux branch 1108. Among them, the check valve 1109 is a valve for controlling the unidirectional flow of the fluid, and the water inlet valve 1110 may be a solenoid valve, whose conduction state is controlled by the controller. When the pure water reflux mode is in operation, the water inlet valve 1110 is turned on, and when the water production mode is in operation, the water inlet valve 1110 is not turned on.

[0155] In some embodiments, a pressure-stabilizing pump may be further provided on the raw water branch of the reverse osmosis membrane filter element, as shown in FIG13 . When operating in the water production mode, the pressure-stabilizing pump 1111 may be used to stabilize the water pressure of the raw water flowing into the raw water inlet. When operating in the pure water reflux mode, the pressure-stabilizing pump 1111 may 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 embodiment of the present application also provides a water purification equipment control device for implementing the water purification equipment control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more water purification equipment control device embodiments provided below can refer to the limitations of the water purification equipment control method above, and will not be repeated here.

[0157] In one embodiment, as shown in FIG. 14 , a water purification equipment control device is provided, including: a pre-backflow water quality difference acquisition module 1402, a pre-backflow standby time determination module 1404, and a pure water backflow 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 according to the water quality difference before reflux. When the standby time after the water production ends 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 any 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 working conditions when the water purification equipment equipped with a reverse osmosis membrane filter element has finished water production, thereby determining the standby time before reflux based on the difference in water quality before reflux under actual working conditions. When the standby time after the completion of water production reaches the standby time before reflux, 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 any water quality change under actual working conditions obtained at one 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 in combination with the water salt ion concentration (water quality value) under actual working conditions. For example, the standby time before reflux and whether to stop the pure water reflux mode can be determined in combination with the water quality value under actual working conditions, 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 of the embodiments, the module for determining the standby time before reflow is also used to: obtain multiple water quality difference intervals before reflow, and a first mapping relationship between the standby time for running the pure water reflow mode after water production is completed and the water quality difference interval before reflow; determine the standby time before reflow that matches the water quality difference before reflow based on the first mapping relationship and the water quality difference interval before reflow to which the water quality difference before reflow belongs.

[0163] In one of the embodiments, the module for determining the standby time before backflow is also used for: if the water quality difference before backflow is greater than or equal to the first preset value, determining that the water quality difference before backflow belongs to the first water quality difference interval, and using 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, determining that the water quality difference before backflow belongs to the second water quality difference interval, and using 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, determining that the water quality difference before backflow belongs to the third water quality difference interval, and using 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 of the embodiments, the pure water reflux mode stop module is also used to: take the time point when the pure water reflux mode starts to run as the starting time point, and from the starting time point, extract the concentrated water side water quality value characterizing 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 of the embodiments, the water purification equipment control device method also includes a module for determining the standby time after reflux, and the module for determining the standby time after reflux is used to: when the pure water reflux mode is stopped, 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; determine the standby time after reflux based on the difference in water quality after reflux, and when the standby time after stopping the pure water reflux mode reaches the standby time after reflux, operate the pure water reflux mode.

[0166] In one of the embodiments, the module for determining the standby time after reflux is also 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 of the embodiments, the module for determining the standby time after reflow is also used for: if the water quality difference after reflow is greater than or equal to the third preset value, determining that the water quality difference after reflow belongs to the fourth water quality difference interval, and using the fourth standby time mapped by the fourth water quality difference interval in the second mapping relationship as the standby time after reflow matching the water quality difference after reflow; if the water quality difference after reflow is greater than the fourth preset value and less than the third preset value, determining that the water quality difference after reflow belongs to the fifth water quality difference interval, and using the fifth standby time mapped by the fifth water quality difference interval in the second mapping relationship as the standby time after reflow; the fifth standby time is greater than the fourth standby time; if the water quality difference after reflow is less than or equal to the fourth preset value, determining that the water quality difference after reflow belongs to the sixth water quality difference interval, and using the sixth standby time mapped by the sixth water quality difference interval in the second mapping relationship as the standby time after reflow; 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 by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0169] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be shown in FIG15. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, 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 the 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 the 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 the structure shown in FIG. 15 is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme 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 arrangement of components.

[0171] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned 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 relevant laws, regulations and standards of relevant countries and regions.

[0175] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and 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 embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium 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), magnetoresistive 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. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0176] The technical features of the above embodiments may 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 only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached 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 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 is obtained; According to the water quality difference before reflux, the standby time before reflux is determined, and when the standby time after the water production is completed reaches the standby time before reflux, the pure water reflux mode is operated; During the operation of the pure water reflux mode, the water quality collection interval duration 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 duration. When any 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 backflow according to the water quality difference before backflow comprises: Acquire a plurality of water quality difference intervals before reflow, and a first mapping relationship between the standby time of running the pure water reflow mode after water production is completed and the water quality difference intervals before reflow; 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 matching the pre-reflow water quality difference is determined.

3. The method according to claim 2, characterized in that The determining, 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, comprises: If the water quality difference before backflow is greater than or equal to a first preset value, it is determined that the water quality difference before backflow belongs to a first water quality difference interval, and the first standby time mapped by the first water quality difference interval in the first mapping relationship is used as the standby time before backflow matching 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, 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; 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, characterized in that: 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 taken as the starting time point, and starting from the starting time point, every time the water quality collection interval is reached, the concentrated water side water quality value characterizing the water quality of the concentrated water side of the filter element is extracted; 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 is determined, and the water quality value difference is used as the water quality change amount of the concentrated water side water quality of the filter element.

5. The method according to claim 1, characterized in that 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, and 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 Determining the standby time after reflux according to the water quality difference after reflux 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 the pure water reflux ends 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 matching the post-reflux water quality difference is determined.

7. The method according to claim 6, characterized in that The determining, according to 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 length that matches the post-reflow water quality difference, comprises: If the water quality difference after the return flow is greater than or equal to the third preset value, it is determined that the water quality difference after the return flow belongs to the fourth water quality difference interval, and the fourth standby time mapped by the fourth water quality difference interval in the second mapping relationship is used as the standby time after the return flow that matches the water quality difference after the return flow; 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 by 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; If the water quality difference after reflow is less than or equal to the fourth preset value, it is determined that the water quality difference after reflow 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 reflow; 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 reflux outlet; A concentrated water branch, the concentrated water branch is connected to the concentrated water outlet, and a first water quality detection device for detecting the water quality of the concentrated water side of the reverse osmosis membrane filter element is provided on the concentrated water branch; 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 of the pure water side of the reverse osmosis membrane filter element is provided on the pure water branch; 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 is operating 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, used to determine the standby time before reflux according to the water quality difference before reflux, and to operate the pure water reflux mode when the standby time after the water production ends 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 concentrated water side of the filter element according to the water quality collection interval duration. When any 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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