Water purifier and filter cartridge life correction method applied to the water purifier

Abstract

The present application relates to water purification device technical field, specifically provide a kind of water purifier and the filter core life correction method applied to the water purifier, to solve the problem of inaccurate evaluation of filter core life caused by inaccurate control of water production of reverse osmosis filter core of existing water purifier.The water purifier of the present application includes controller and booster pump and reverse osmosis filter core connected in turn, first control valve and flow detection device are provided on the pipeline communicated with the pure water port of reverse osmosis filter core, and the controller adjusts the synchronous opening and closing of booster pump and first control valve.Through such setting, on the one hand, when booster pump and control valve realize synchronous opening and closing, it avoids that reverse osmosis filter core continues to produce water under internal pressure after booster pump is shut down, realizes accurate control and statistics of water production flow of reverse osmosis filter core, and is convenient to improve the accuracy of evaluation of reverse osmosis filter core life.

Description

Technical Field

[0001] This invention relates to the field of water purification device technology, specifically providing a water purifier and a method for correcting the lifespan of the filter cartridge applied to the water purifier. Background Technology

[0002] Water purifiers typically include a reverse osmosis filter and a booster pump. The booster pump applies pressure to the raw water, causing it to pass through the reverse osmosis filter to produce purified water. In current technology, the flow rate of purified water is a commonly used method for assessing filter lifespan. Generally, the total amount of purified water the filter can process is preset, and the flow meter measures the amount processed within the specified usage time. When the preset total purified water volume is reached, the filter reaches the end of its lifespan and needs to be replaced by the user.

[0003] However, when the booster pump of the water purifier stops working, due to the pressure inside the reverse osmosis filter, the reverse osmosis filter can still slowly flow some pure water downstream. This amount of purified water is easily overlooked, leading to inaccurate assessment of the filter's lifespan and a poor user experience.

[0004] Accordingly, there is a need in this field for a new type of water purifier to solve the above problems. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the existing technology, namely, to solve the problem that the inaccurate control of the water purification output of the reverse osmosis filter element in the existing water purifier leads to inaccurate evaluation of the filter element life.

[0006] In a first aspect, the present invention provides a water purifier, which includes a controller and a booster pump and a reverse osmosis filter element connected in sequence. A first control valve and a flow detection device are provided on the pipeline connected to the pure water outlet of the reverse osmosis filter element. The controller adjusts the booster pump to switch on and off synchronously with the first control valve.

[0007] In the preferred embodiment of the water purifier described above, the first control valve is a pulse solenoid valve.

[0008] In the preferred embodiment of the water purifier described above, the pulse switching frequency of the first control valve is the same as the pulse frequency of the booster pump.

[0009] In the preferred embodiment of the water purifier described above, the flow detection device is located downstream of the first control valve.

[0010] In a second aspect, the present invention also provides a method for correcting the lifespan of the filter element in the water purifier. The method includes: obtaining a preset usage period and a preset total output water volume for the reverse osmosis filter element, denoted as A and B respectively; obtaining the cumulative water output water volume of the reverse osmosis filter element within a cutoff time period, denoted as Q(t) and T(t) respectively; setting a preset function, denoted as F; converting the preset total output water volume into a first usage time according to the preset function, denoted as F(B); converting the cumulative water output water volume into a second usage time according to the preset function, denoted as F(Q(t)); and calculating the lifespan percentage of the reverse osmosis filter element according to the formula 1-(T(t)+F(Q(t))) / (A+F(B)).

[0011] In the preferred embodiment of the above-mentioned method for correcting the filter life of a water purifier, the preset function is a linear function, and the constant parameter of the linear function is set to K; then the first usage time is denoted as KB, and the second usage time is denoted as K(Q(t)); the lifespan percentage of the reverse osmosis filter is calculated according to the formula 1-(T(t)+K(Q(t))) / (A+KB).

[0012] In the preferred embodiment of the above-mentioned method for correcting the filter life of a water purifier, the water purifier includes at least two different application scenario settings, and the value of the constant parameter K corresponds to the application scenario settings.

[0013] In the preferred embodiment of the above-mentioned method for correcting the lifespan of a water purifier filter cartridge, the correction method further includes: comparing the lifespan percentage with a preset value; and selectively displaying the lifespan status information of the reverse osmosis filter cartridge based on the comparison result.

[0014] In the preferred embodiment of the above-mentioned method for correcting the filter life of a water purifier, the step of "selectively displaying the life status information of the reverse osmosis filter based on the comparison results" specifically includes: if the life percentage is greater than the preset value; then displaying the remaining usage time of the reverse osmosis filter based on the life percentage and the preset usage period and / or displaying the remaining water output of the reverse osmosis filter based on the life percentage and the preset total water output.

[0015] In the preferred embodiment of the above-mentioned method for correcting the filter life of a water purifier, the step of "selectively displaying the life status information of the reverse osmosis filter based on the comparison results" specifically includes: if the life percentage is not greater than the preset value, then displaying a replacement reminder message for the reverse osmosis filter.

[0016] Those skilled in the art will understand that the water purifier of the present invention includes a controller and a booster pump and a reverse osmosis filter element connected in sequence. A control valve and a flow detection device are provided on the pipeline connected to the pure water outlet of the reverse osmosis filter element. The controller adjusts the booster pump and the control valve to switch on and off synchronously. With this setting, on the one hand, when the booster pump and the control valve switch on and off synchronously, it avoids the reverse osmosis filter element from continuing to produce water under internal pressure after the booster pump is turned off, thus achieving precise control and statistics of the water production flow of the reverse osmosis filter element, which facilitates the improvement of the accuracy of the assessment of the life of the reverse osmosis filter element.

[0017] Furthermore, the control valve is a pulse solenoid valve. The pulse switching frequency of the control valve is the same as the pulse frequency of the booster pump. With this setting, the water output of the reverse osmosis filter can be precisely controlled, and the different water output volumes of the water purifier can be adjusted by regulating the pulse frequency of the booster pump to meet the user's needs for different water flow rates.

[0018] In a second aspect, the present invention also provides a method for correcting the lifespan of a water purifier filter element. This method includes: obtaining a preset usage period and a preset total output water volume for the reverse osmosis filter element, denoted as A and B respectively; obtaining the cumulative water output of the reverse osmosis filter element within a cutoff time period, denoted as Q(t) and T(t) respectively; setting a preset function, denoted as F; converting the preset total output water volume into a first usage time based on the preset function, denoted as F(B); converting the cumulative output water volume into a second usage time based on the preset function, denoted as F(Q(t)); and calculating the lifespan percentage of the reverse osmosis filter element according to the formula 1-(T(t)+F(Q(t))) / (A+F(B)). Through this setting, the lifespan percentage of the reverse osmosis filter element calculated based on the parameters of usage time and water output water volume more closely reflects the actual usage state of the reverse osmosis filter, improving the accuracy of filter element lifespan assessment.

[0019] Furthermore, the water purifier includes at least two different application scenario settings, with the value of the constant parameter K corresponding to each application scenario setting. Through this setting, the value of the constant parameter K is switched by the application scenario setting, allowing the correction method to more accurately calculate the lifespan percentage of the reverse osmosis filter cartridge under different usage scenarios.

[0020] Furthermore, the correction method also includes: comparing the lifespan percentage with a preset value; and selectively displaying the lifespan status information of the reverse osmosis filter cartridge based on the comparison result. If the lifespan percentage is greater than the preset value, the remaining usage time of the reverse osmosis filter cartridge is displayed based on the lifespan percentage and a preset usage period, and / or the remaining output water volume of the reverse osmosis filter cartridge is displayed based on the lifespan percentage and a preset total output water volume. If the lifespan percentage is not greater than the preset value, a replacement reminder for the reverse osmosis filter cartridge is displayed. Through this setting, the lifespan percentage calculated by this correction method can more accurately display the remaining output water volume and remaining time of the reverse osmosis filter cartridge, maximizing the utilization rate of the reverse osmosis filter cartridge and saving user costs. Attached Figure Description

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0022] Figure 1 This is a schematic diagram of the water circuit structure of the water purifier of the present invention.

[0023] Figure 2 This is a flowchart of the main steps of the method for correcting the filter life of the water purifier of the present invention;

[0024] Figure 3 This is a detailed flowchart of the method for correcting the filter life of the water purifier according to the present invention.

[0025] List of reference numerals in the attached diagram:

[0026] 1. Pre-filter; 2. Reverse osmosis filter; 3. Post-filter; 4. Booster pump; 5. Faucet; 6. Controller; 71. First control valve; 72. Second control valve; 73. Third control valve; 8. Flow detection device. Detailed Implementation

[0027] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] It should be noted that in the description of this invention, terms such as "upper," "lower," "inner," and "outer" that indicate direction or positional relationship are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0029] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] The background art points out that existing water purifiers suffer from inaccurate control of reverse osmosis filter output, leading to inaccurate filter lifespan assessments. This invention addresses this issue by simultaneously opening and closing booster pumps and control valves at both ends of the reverse osmosis filter in the water purifier. This ensures more precise and statistically accurate water production from the reverse osmosis filter, improving the user experience.

[0031] Specifically, such as Figure 1 As shown, the water purifier of the present invention includes a pre-filter 1, a booster pump 4, a reverse osmosis filter 2, a post-filter 3, and a faucet 5 connected in sequence. The inlet of the pre-filter 1 is connected to a water source, the outlet of the pre-filter 1 is connected to the inlet of the booster pump 4, the outlet of the booster pump 4 is connected to the raw water outlet of the reverse osmosis filter 2, the pure water outlet of the reverse osmosis filter 2 is connected to the inlet of the post-filter 3, and the outlet of the post-filter 3 is connected to the faucet 5.

[0032] A first control valve 71 is installed between the pure water outlet of the reverse osmosis filter element 2 and the inlet of the post-filter element 3; a second control valve 72 is installed between the outlet of the pre-filter element 1 and the inlet of the booster pump 4; and a third control valve 73 is installed on the pipeline connected to the wastewater outlet of the reverse osmosis filter element 2. A flow detection device 8 is installed between the inlet of the post-filter element 3 and the pure water outlet of the reverse osmosis filter element 2. The flow detection device 8 is located downstream of the first control valve 71.

[0033] like Figure 1 As shown, the water purifier also includes a controller 6. The booster pump 4, the first control valve 71, the second control valve 72, the third control valve 73, and the flow detection device 8 are all communicatively connected to the controller 6. The controller 6 can adjust the synchronous switching of the booster pump 4 and the first control valve 71.

[0034] When the booster pump 4 stops working, due to the pressure of water inside the reverse osmosis filter element 2, a portion of pure water can continue to flow out from the pure water outlet of the reverse osmosis filter element 2. This portion of water flow may not be detected after the machine is shut down. For example, when the water purifier is powered off, the flow detection device 8 stops working and cannot record this portion of water production, thus affecting the assessment of the service life of the reverse osmosis filter element 2.

[0035] The opening of the first control valve 71 and the start of the booster pump 4 are performed simultaneously to put the water purifier into normal water production mode. The flow detection device 8 can record the purified water output of the reverse osmosis filter element 2 in a timely manner.

[0036] The simultaneous closure of the first control valve 71 and the stopping of the booster pump 4 puts the water purifier into a water-stopping mode. Because the closure of the first control valve 71 and the stopping of the booster pump 4 occur simultaneously, although there is pressurized water inside the reverse osmosis filter element 2, no purified water flows out of the pure water outlet of the reverse osmosis filter element 2. This allows the flow detection device 8 to more accurately record the purified water output of the reverse osmosis filter element 2, improving the accuracy of the lifespan assessment of the reverse osmosis filter element 2 and maximizing its utilization rate.

[0037] Furthermore, users have different water usage needs for water purifiers at different times or in different usage scenarios. When users take out a large amount of water, such as using a kettle or basin to collect purified water, the water flow rate needs to be increased to save users' waiting time; when users take out a small amount of water, such as using a cup to collect purified water, the water flow rate needs to be reduced to avoid the water flowing too fast and overflowing or splashing.

[0038] The water purifier of the present invention utilizes pulse width modulation (PWM) control mechanism to adjust the pulse frequency of booster pump 4, thereby regulating the water flow rate of the water purifier.

[0039] Specifically, such as Figure 1 As shown, the first control valve 71 is a pulse solenoid valve, and the pulse switching frequency of the first control valve 71 is the same as the pulse frequency of the booster pump 4.

[0040] Within the same frequency cycle, when the output power of booster pump 4 is paused, the first control valve 71 is closed during that cycle; when the output power of booster pump 4 is in the output state, the first control valve 71 is opened during that cycle. Increasing the pulse frequency of booster pump 4 increases the output clean water flow rate; decreasing the pulse frequency of booster pump 4 decreases the output clean water flow rate. In this way, by adjusting the pulse frequency of booster pump 4, different output clean water flow rates can be adjusted to meet different user water intake needs.

[0041] In addition, it should be noted that the flow detection device 8 mentioned above uses a flow meter, the second control valve 72 is an inlet solenoid valve, and the third control valve 73 is a wastewater solenoid valve.

[0042] Most current water purifiers determine the lifespan of their filter cartridges based on either usage time or water output. However, using the lifespan obtained through these methods as a reference for replacing reverse osmosis filter cartridges often results in the filter cartridge's efficiency not being maximized, leading to higher replacement costs.

[0043] Preferably, the present invention also provides a method for correcting the lifespan of a filter cartridge in a water purifier, the method comprising:

[0044] Obtain the preset service life and preset total output water volume of reverse osmosis filter element 2. The preset service life is denoted as A, and the preset total output water volume is denoted as B.

[0045] Obtain the cumulative water output of reverse osmosis filter element 2 within the cutoff time period. The cumulative water output is denoted as Q(t), and the cutoff time period is denoted as T(t).

[0046] Set a preset function, denoted as F; convert the preset total water output into the first usage time according to the preset function, and the first usage time is denoted as F(B); convert the cumulative water output into the second usage time according to the preset function, and the second usage time is denoted as F(Q(t)).

[0047] The lifespan percentage of reverse osmosis filter element 2 is calculated using formula 1-(T(t)+F(Q(t))) / (A+F(B)).

[0048] The preset function is a linear function. The constant parameter of the linear function is set to K. The first usage time is denoted as KB, and the second usage time is denoted as K(Q(t)).

[0049] The lifespan percentage of reverse osmosis filter element 2 is calculated using formula 1-(T(t)+K(Q(t))) / (A+KB).

[0050] Compared to existing technologies, the lifespan ratio of the reverse osmosis filter element 2 calculated based on the formula and parameters of usage time and water output is more in line with the actual usage of reverse osmosis filters, thus improving the accuracy of evaluating filter element lifespan.

[0051] It should be noted that the preset function is not limited to the linear function mentioned above. Depending on the actual application, those skilled in the art can also use other nonlinear functions, such as quadratic functions, exponential functions, power functions, logarithmic functions, etc., as long as the calculated filter life percentage is within a reasonable range. Of course, a linear function is preferred, as it is more suitable for assessing the lifespan of most reverse osmosis filter elements.

[0052] For example, a water purifier using a reverse osmosis filter cartridge 2 with a flux of 800G is used. The specific parameters of the reverse osmosis filter cartridge 2 are as follows: pure water production flow rate 2.5L / min, preset total output water volume of purified water 8000L, and preset service life of 4 years.

[0053] Ideally, if the reverse osmosis filter 2 of the water purifier produces water for an average of 2.19 minutes per day, and the reverse osmosis filter 2 is used for 4 years, the amount of purified water that the reverse osmosis filter 2 can produce is 2.19*2.5*4*365=7993.5L. This amount of purified water is close to the preset total output of 8000L, and the reverse osmosis filter 2 has reached its maximum efficiency. At this time, the user's filter replacement cost is the lowest.

[0054] It should be noted that the above usage scenarios are theoretical. In actual use, the amount of purified water produced by the reverse osmosis filter 2 varies depending on the user's water demand. This means that replacing the filter solely based on a preset lifespan or solely based on the amount of purified water is not relevant to the user's actual application scenario.

[0055] Compared to an ideal state, a water purifier includes at least two application scenario settings: a high-frequency application scenario setting and a low-frequency application scenario setting. The value of the constant parameter K corresponds to the application scenario setting.

[0056] In the first application scenario of the water purifier, if the daily water production time of the reverse osmosis filter 2 exceeds 2.19 minutes, and the purified water volume of the reverse osmosis filter 2 reaches 8000L, then the actual service life of the reverse osmosis filter 2 is less than 4 years. In other words, the water purifier is used frequently, and the actual service life of the reverse osmosis filter 2 is less than the preset service life. If the reverse osmosis filter 2 is replaced according to the preset service life, the quality of the water produced by the water purifier will decline in the later stages, affecting the quality of the water output from the water purifier.

[0057] In the second application scenario, where the water purifier produces water for no more than 2.19 minutes per day, and the reverse osmosis filter 2 produces 8000L of purified water, then the actual lifespan of the reverse osmosis filter 2 is greater than 4 years. In other words, the water purifier is not used frequently, and the actual lifespan of the reverse osmosis filter 2 exceeds its preset lifespan. If the reverse osmosis filter 2 is replaced according to its preset lifespan, its performance will not be maximized, resulting in filter waste and increased user costs.

[0058] Continuing with the example of the reverse osmosis filter cartridge 2 with a flow rate of 800G, the filter cartridge lifespan percentage is calculated according to the above formula. The preset total output water volume is 8000L, B = 8000L; the preset service life is 4 years, A = 4 * 365 days; when the water purifier is used for 365 days, that is, the cutoff time period T(365) = 365, the flow meter records that the purified water volume produced is 3000L, that is, the cumulative output water volume Q(365) = 3000L.

[0059] When users are accustomed to short water intake intervals and select the high-frequency application scenario setting for the water purifier, such as a public water purifier, the value of the constant parameter K should be set to no less than 1 so that the filter life ratio is close to the usage scenario where the filter life is evaluated based on the amount of purified water.

[0060] For example, when K is 1, the lifespan percentage of reverse osmosis filter element 2 is:

[0061] 1 - (365 + 1 * 3000) / (4 * 365 + 1 * 8000) = 0.64.

[0062] When users are accustomed to long intervals between water draws, they should select the low-frequency application scenario setting for the water purifier, such as a household water purifier. The constant parameter K should be set to a value less than 1 so that the filter life ratio is close to the usage scenario where the filter life is evaluated by the usage time.

[0063] For example, when K is 0.1, the lifespan percentage of reverse osmosis filter element 2 is:

[0064] 1 - (365 + 0.1 * 3000) / (4 * 365 + 0.1 * 8000) = 0.71.

[0065] Of these, the percentage of lifespan calculated solely based on usage time is 1 - (365 / 4*365) = 0.75; the percentage of lifespan calculated solely based on water output is 1 - (3000 / 8000) = 0.625.

[0066] The comparison shows that when producing the same amount of purified water within the same time period, if the water purifier is used frequently, the lifespan percentage of the reverse osmosis filter cartridge 2 tends to be based on the amount of purified water, thus affecting the filter cartridge's lifespan. Conversely, if the water purifier is used infrequently, the lifespan percentage of the reverse osmosis filter cartridge 2 tends to be closer to the filter cartridge's default lifespan. Therefore, the filter cartridge lifespan percentage calculated by considering both water output and usage time more accurately reflects the actual usage status of the reverse osmosis filter cartridge 2 in real-world scenarios. In other words, the filter cartridge lifespan percentage calculated by adjusting the constant parameter K of the water purifier's application scenario setting more closely matches the actual application conditions of the water purifier, more accurately reflects the current lifespan percentage of the filter cartridge, and facilitates maximizing filter cartridge utilization.

[0067] It should be noted that the specific values ​​of the constant parameter K mentioned above are only used to illustrate that the correction method is applicable to different application scenarios. In practical applications, those skilled in the art can flexibly adjust and set two or more application scenario levels corresponding to the constant parameter K to meet actual needs.

[0068] Preferably, the method for correcting the filter life of the water purifier further includes: comparing the lifespan percentage with a preset value;

[0069] Based on the comparison results, the life status information of reverse osmosis filter element 2 is selectively displayed.

[0070] If the remaining lifespan percentage is greater than the preset value, the remaining usage time of reverse osmosis filter element 2 will be displayed based on the remaining lifespan percentage and the preset usage period, and / or the remaining output water volume of reverse osmosis filter element 2 will be displayed based on the remaining lifespan percentage and the preset total output water volume. If the remaining lifespan percentage is not greater than the preset value, a replacement reminder message for reverse osmosis filter element 2 will be displayed.

[0071] For example, the water purifier includes a display screen that is communicatively connected to the controller 6. The preset value is set to 0.02.

[0072] When the lifespan percentage of the filter element calculated according to the above formula is 0.5, the lifespan percentage (0.5) is greater than the preset value (0.02). Based on the product of the lifespan percentage (0.5) and the preset service life (4*365 days), the remaining service time of the reverse osmosis filter element 2 is calculated to be 730 days. Based on the product of the lifespan percentage (0.5) and the preset total water output (8000L), the remaining water output of the reverse osmosis filter element 2 is calculated to be 4000L. The remaining service time (730 days) and the remaining water output (4000L) are displayed on the display screen of the water purifier via the controller 6, reflecting the current usage status of the reverse osmosis filter element 2 of the water purifier.

[0073] It should be noted that, depending on the actual application, those skilled in the art can calculate the remaining usage time of the reverse osmosis filter element 2 by multiplying the lifespan percentage by the preset usage period, or they can calculate the remaining output water volume of the reverse osmosis filter element 2 by multiplying the lifespan percentage (0.5) by the preset total output water volume (8000L). Of course, it is preferable to simultaneously report the remaining usage time and remaining output water volume to the current usage status of the reverse osmosis filter element 2, so that the user can understand the current usage status of the reverse osmosis filter element 2 from multiple perspectives.

[0074] When the lifespan percentage calculated according to the above formula is 0.02, and the lifespan percentage (0.02) is not greater than the preset value (0.02), the replacement reminder information will be displayed on the screen of the water purifier by the controller 6 to remind the user to replace the filter in time.

[0075] Furthermore, it should be noted that the specific values ​​set and selected for the above-mentioned preset values, the flux of the reverse osmosis filter element 2, the pure water production rate, the preset total output water volume, and the preset service life are only for illustrating the calculation process of this correction method.

[0076] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for correcting the lifespan of a water purifier filter cartridge, characterized in that, The system includes a controller (6) and a booster pump (4) and a reverse osmosis filter element (2) connected in sequence. A first control valve (71) and a flow detection device (8) are provided on the pipeline connected to the pure water outlet of the reverse osmosis filter element (2). The controller (6) adjusts the booster pump (4) and the first control valve (71) to switch synchronously. The correction method includes: Obtain the preset service life and preset total output water of the reverse osmosis filter element (2), wherein the preset service life is denoted as A and the preset total output water is denoted as B; The cumulative water output of the reverse osmosis filter element (2) during the cutoff time period is obtained, and the cumulative water output is denoted as Q(t), and the cutoff time period is denoted as T(t); Set a preset function, denoted as F; convert the preset total water output into a first usage time according to the preset function, and the first usage time is denoted as F(B); convert the cumulative water output into a second usage time according to the preset function, and the second usage time is denoted as F(Q(t)). The lifespan percentage of the reverse osmosis filter element (2) is calculated according to formula 1-(T(t)+F(Q(t))) / (A+F(B)); The preset function is a linear function, and the constant parameter of the linear function is set to K; then the first usage time is K*B, and the second usage time is K*(Q(t)); The lifespan percentage of the reverse osmosis filter element (2) is calculated according to formula 1-(T(t)+K*(Q(t))) / (A+K*B); The water purifier includes at least two different application scenario settings, and the value of the constant parameter K corresponds to the application scenario settings. When the water purifier is selected for a high-frequency application scenario, the value of the constant parameter K is set to be no less than 1; When the water purifier is set to the low-frequency application scenario mode, the value of the constant parameter K is set to be less than 1.

2. The method for correcting the filter life of a water purifier according to claim 1, characterized in that, The first control valve (71) is a pulse solenoid valve.

3. The method for correcting the filter life of a water purifier according to claim 2, characterized in that, The pulse switching frequency of the first control valve (71) is the same as the pulse frequency of the booster pump (4).

4. The method for correcting the filter life of a water purifier according to claim 1, characterized in that, The flow detection device (8) is located downstream of the first control valve (71).

5. The method for correcting the filter life of a water purifier according to claim 1, characterized in that, The correction method further includes: Compare the lifespan percentage with a preset value; Based on the comparison results, the life status information of the reverse osmosis filter element (2) is selectively displayed.

6. The method for correcting the filter life of a water purifier according to claim 5, characterized in that, The step of "selectively displaying the life status information of the reverse osmosis filter element (2) based on the comparison results" specifically includes: If the lifespan percentage is greater than the preset value; The remaining usage time of the reverse osmosis filter element (2) is then displayed based on the lifespan percentage and the preset usage period. And / or The remaining water output of the reverse osmosis filter element (2) is displayed based on the lifespan percentage and the preset total water output.

7. The method for correcting the filter life of a water purifier according to claim 5, characterized in that, The step of "selectively displaying the life status information of the reverse osmosis filter element (2) based on the comparison results" specifically includes: If the lifespan percentage is not greater than the preset value; Then the replacement reminder information for the reverse osmosis filter element (2) will be displayed.

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