Water purifier and filter element service life correction method applied to water purifier

Abstract

The invention relates to the technical field of water purification devices, particularly provides a water purifier and a filter element service life correction method applied to the water purifier, and aims to solve the problem of inaccurate filter element service life evaluation caused by inaccurate purified water yield control of a reverse osmosis filter element of an existing water purifier. In order to achieve the purpose, the water purifier comprises a controller, a booster pump and a reverse osmosis filter element, the booster pump and the reverse osmosis filter element are sequentially communicated, a first control valve and a flow detection device are arranged on a pipeline communicated with a pure water opening of the reverse osmosis filter element, and the controller adjusts the booster pump and the first control valve to be synchronously opened and closed. Through the arrangement, on one hand, when the booster pump and the control valve are synchronously opened and closed, the reverse osmosis filter element is prevented from continuously producing water under the internal pressure after the booster pump is shut down, the accurate control and statistics of the water production flow of the reverse osmosis filter element are realized, and the evaluation accuracy of the service life of the reverse osmosis filter element is conveniently improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification devices, and specifically provides a water purifier and a filter element life correction method applied to the water purifier. Background Art

[0002] A water purifier usually includes a reverse osmosis filter element and a booster pump. The booster pump applies a certain pressure to the raw water so that the raw water passes through the reverse osmosis filter element to produce pure water. In the prior art, the water flow rate based on pure water is a relatively common means of evaluating the life of the filter element. Generally speaking, the total amount of clean water that the filter element can process is preset, and the amount of clean water processed during the use time is obtained through a flow meter. When the amount of clean water reaches the preset total amount of clean water, the filter element reaches the end of its service life and the user needs to replace the filter element.

[0003] However, when the booster pump of the water purifier stops working, due to the certain pressure inside the reverse osmosis filter, the reverse osmosis filter can continue to slowly flow out some pure water downstream. This amount of pure water is easily ignored, resulting in inaccurate filter life assessment and poor user experience.

[0004] Accordingly, the art needs a new water purifier to solve the above problems. Summary of the invention

[0005] In order to solve the above problems in the prior art, that is, to solve the problem that the water output control of the reverse osmosis filter element of the existing water purifier is not accurate, resulting in inaccurate evaluation of the filter element life.

[0006] In a first aspect, the present invention provides a water purifier, comprising a controller and a booster pump and a reverse osmosis filter element connected in sequence, a first control valve and a flow detection device being provided on a pipeline connected to a pure water outlet of the reverse osmosis filter element, and the controller regulating the synchronous switching of the booster pump and the first control valve.

[0007] In the case of the preferred technical solution of the above-mentioned water purifier, the first control valve is a pulse solenoid valve.

[0008] In the case of the preferred technical solution 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 case of the preferred technical solution of the above-mentioned water purifier, 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 life of a filter element of the water purifier, the correction method comprising: obtaining a preset service life and a preset total water output of the reverse osmosis filter element, the preset service life being denoted as A, and the preset total water output being denoted as B; obtaining the cumulative water output of the purified water of the reverse osmosis filter element within a cutoff time period, the cumulative water output being denoted as Q(t), and the cutoff time period being denoted as T(t); setting a preset function, denoted as F; converting the preset total water output into a first usage time according to the preset function, the first usage time being denoted as F(B); converting the cumulative water output into a second usage time according to the preset function, the second usage time being denoted as F(Q(t)); calculating the life proportion of the reverse osmosis filter element according to the formula 1-(T(t)+F(Q(t))) / (A+F(B)).

[0011] In the case of the preferred technical solution of the filter element life correction method of the above-mentioned 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 recorded as KB, and the second usage time is recorded as K(Q(t)); according to the formula 1-(T(t)+K(Q(t))) / (A+KB), the life percentage of the reverse osmosis filter element is calculated.

[0012] In the case of the preferred technical solution of the filter element life correction method of the above-mentioned water purifier, the water purifier includes at least two different application scenario gears, and the value of the constant parameter K corresponds to the application scenario gear.

[0013] In the case of the preferred technical solution of the filter element life correction method of the above-mentioned water purifier, the correction method also includes: comparing the life percentage with a preset value; and selectively displaying the life status information of the reverse osmosis filter element based on the comparison result.

[0014] In the case of the preferred technical scheme of the filter element life correction method of the above-mentioned water purifier, the step of "selectively displaying the life status information of the reverse osmosis filter element based on the comparison result" specifically includes: if the life ratio is greater than the preset value; then displaying the remaining usage time of the reverse osmosis filter element according to the life ratio and the preset service life and / or displaying the remaining water output of the reverse osmosis filter element according to the life ratio and the preset total water output.

[0015] In the case of the preferred technical solution of the above-mentioned water purifier filter element life correction method, the step of "selectively displaying the life status information of the reverse osmosis filter element based on the comparison result" specifically includes: if the life proportion is not greater than the preset value; then displaying the replacement reminder information of the reverse osmosis filter element.

[0016] Those skilled in the art can 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 port of the reverse osmosis filter element, and the controller adjusts the booster pump and the control valve to switch synchronously. Through such a setting, on the one hand, when the booster pump and the control valve are switched synchronously, it is avoided that the reverse osmosis filter element continues to produce water under internal pressure after the booster pump is turned off, and the water production flow of the reverse osmosis filter element is accurately controlled and counted, which is convenient for improving 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. Through such a setting, the water output of the reverse osmosis filter element can be accurately controlled while adjusting the pulse frequency of the booster pump to achieve different water output adjustments of the water purifier, meeting the user's needs for different water output flows.

[0018] In the second aspect, the present invention also provides a method for correcting the life of a filter element of a water purifier, the correction method comprising: obtaining a preset service life and a preset total water output of a reverse osmosis filter element, the preset service life is recorded as A, and the preset total water output is recorded as B; obtaining the cumulative water output of the reverse osmosis filter element in the cut-off time period, the cumulative water output is recorded as Q(t), and the cut-off time period is recorded as T(t); setting a preset function, recorded as F; converting the preset total water output into a first use time according to the preset function, the first use time is recorded as F(B); converting the cumulative water output into a second use time according to the preset function, the second use time is recorded as F(Q(t)); calculating the life proportion of the reverse osmosis filter element according to the formula 1-(T(t)+F(Q(t))) / (A+F(B)). Through such a setting, the life proportion of the reverse osmosis filter element calculated based on the parameters of the two dimensions of use time and water output is more in line with the actual use status of the reverse osmosis filter, and the accuracy of evaluating the life of the filter element is improved.

[0019] Furthermore, the water purifier includes at least two different application scenario gears, and the value of the constant parameter K corresponds to the application scenario gear. Through such a setting, the value of the constant parameter K is switched by the application scenario gear, so that the correction method can more accurately calculate the life proportion of the reverse osmosis filter element in different usage scenarios.

[0020] Furthermore, the correction method also includes: comparing the life percentage with a preset value; and selectively displaying the life status information of the reverse osmosis filter element according to the comparison result. If the life percentage is greater than the preset value, the remaining use time of the reverse osmosis filter element is displayed according to the life percentage and the preset service life, and / or the remaining water output of the reverse osmosis filter element is displayed according to the life percentage and the preset total water output. If the life percentage is not greater than the preset value, a replacement reminder for the reverse osmosis filter element is displayed. Through such a setting, the life percentage calculated according to the correction method can more accurately display the remaining water output and remaining time of the reverse osmosis filter element, maximize the utilization rate of the reverse osmosis filter element, and save user costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0023] Figure 2 It is a flow chart of the main steps of the method for correcting the life of the filter element of the water purifier of the present invention;

[0024] Figure 3 It is a detailed step flow chart of the method for correcting the filter element life of the water purifier of the present invention.

[0025] List of reference numerals:

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

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0028] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the 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, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0029] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] Based on the problem pointed out in the background technology that the water production control of the reverse osmosis filter element of the existing water purifier is not accurate, resulting in inaccurate evaluation of the filter element life. In the water purifier of the present invention, the booster pump and the control valve at both ends of the reverse osmosis filter element are opened and closed synchronously, thereby ensuring that the water produced by the reverse osmosis filter element is more accurate and convenient for statistics, thereby improving user experience.

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

[0032] Among them, a first control valve 71 is provided between the pure water port of the reverse osmosis filter element 2 and the inlet of the post filter element 3, a second control valve 72 is provided between the outlet of the pre-filter element 1 and the inlet of the booster pump 4, and a third control valve 73 is provided on the pipeline connected to the waste water port of the reverse osmosis filter element 2. A flow detection device 8 is provided between the inlet of the post filter element 3 and the pure water port of the reverse osmosis filter element 2. Among them, 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 connected to the controller 6. The controller 6 can adjust the booster pump 4 and the first control valve 71 to switch synchronously.

[0034] When the booster pump 4 stops working, usually due to the water pressure inside the reverse osmosis filter element 2, the pure water outlet of the reverse osmosis filter element 2 can continue to flow out some pure water, and there is a risk that this part of the water flow will not be detected after the shutdown. For example, when the water purifier is powered off, the flow detection device 8 stops working and cannot record this part of the water production, which affects the evaluation of the service life of the reverse osmosis filter element 2.

[0035] The first control valve 71 is opened and the booster pump 4 is started simultaneously to make the water purifier enter the normal water production working 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 first control valve 71 is closed and the booster pump 4 is stopped simultaneously to put the water purifier into the water production stop mode. In this way, since the first control valve 71 is closed and the booster pump 4 is stopped simultaneously, although there is water pressure inside the reverse osmosis filter element 2, no purified water flows out of the pure water port of the reverse osmosis filter element 2, which makes it easier for the flow detection device 8 to record the purified water output of the reverse osmosis filter element 2 more accurately, improves the accuracy of the life assessment of the reverse osmosis filter element 2, and maximizes the utilization rate of the reverse osmosis filter element 2.

[0037] In addition, users have different water demands for water purifiers at different times or in different usage scenarios. When users take 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 user waiting time; when users take a small amount of water, such as using a cup to collect purified water, the water flow rate needs to be reduced to avoid overflow or splashing of purified water due to excessive water flow.

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

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

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

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

[0042] Most of the current water purifiers use the usage time or water output to evaluate and determine the service life of the filter element. However, if the service life obtained by the above evaluation method is used as a reference to replace the reverse osmosis filter element 2, the efficiency of the reverse osmosis filter element 2 often fails to be maximized, and the cost of replacing the reverse osmosis filter element 2 is high.

[0043] Preferably, the present invention also provides a method for correcting the life of a filter element applied to a water purifier, the correction method comprising:

[0044] Obtaining a preset service life and a preset total water output of the reverse osmosis filter element 2, wherein the preset service life is recorded as A and the preset total water output is recorded as B;

[0045] Obtain the cumulative output of purified water from the reverse osmosis filter element 2 within the cut-off time period, the cumulative output is recorded as Q(t), and the cut-off time period is recorded as T(t);

[0046] A preset function is set, which is recorded as F; according to the preset function, the preset total water output is converted into a first usage time, which is recorded as F(B); according to the preset function, the cumulative water output is converted into a second usage time, which is recorded as F(Q(t));

[0047] According to the formula 1-(T(t)+F(Q(t))) / (A+F(B)), the life span of the reverse osmosis filter element 2 is calculated.

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

[0049] According to the formula 1-(T(t)+K(Q(t))) / (A+KB), the life span of the reverse osmosis filter element 2 is calculated.

[0050] Compared with the prior art, the life proportion of the reverse osmosis filter element 2 calculated according to the formula combining the parameters of the two dimensions of usage time and water output is more in line with the actual usage status of the reverse osmosis filter, and improves the accuracy of evaluating the life of the filter element.

[0051] It should be noted that the preset function is not limited to the above-mentioned linear function. According to practical applications, those skilled in the art may also use other nonlinear functions, such as quadratic functions, exponential functions, power functions, logarithmic functions, etc., as long as the life percentage of the filter element after conversion can be achieved at a reasonable value. Of course, a linear function is preferred, and the linear function is more suitable for the life evaluation of most reverse osmosis filter elements 2.

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

[0053] Under ideal conditions, if the reverse osmosis filter element 2 of the water purifier produces water for an average of 2.19 minutes per day, when the reverse osmosis filter element 2 of the water purifier is used for 4 years, the amount of clean water that the reverse osmosis filter element 2 can produce is 2.19*2.5*4*365=7993.5L, which is close to the preset total water output of 8000L. The reverse osmosis filter element 2 has achieved maximum utilization efficiency, and the user's filter element replacement cost is the lowest at this time.

[0054] It should be noted that the above usage scenarios are theoretical usage scenarios. During actual use of the water purifier, the amount of clean water that the reverse osmosis filter element 2 can produce varies according to the user's water demand. This results in replacing the filter element solely based on the preset service life or solely based on the amount of clean water, which deviates from the user's actual application scenario.

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

[0056] In the first application scenario of the water purifier, that is, if the water production time of the reverse osmosis filter element 2 of the water purifier exceeds 2.19 minutes per day, when the water purification volume of the reverse osmosis filter element 2 reaches 8000L, the actual service life of the reverse osmosis filter element 2 is less than 4 years. That is, the water purifier is used frequently, and the actual service life of the reverse osmosis filter element 2 is less than the preset service life. If the reverse osmosis filter element 2 is updated at the preset service life, the water quality of the water purifier in the later period will decline, affecting the water quality of the water purifier.

[0057] When the water purifier is used in the second application scenario, that is, if the water purifier produces water for no more than 2.19 minutes per day, when the amount of purified water produced by the reverse osmosis filter element 2 reaches 8000L, the actual service life of the reverse osmosis filter element 2 is greater than 4 years. In other words, the water purifier is not used frequently, and the actual service life of the reverse osmosis filter element 2 is greater than the preset service life. If the reverse osmosis filter element 2 is updated at the preset service life, the performance of the reverse osmosis filter element 2 cannot be maximized, resulting in waste of the filter element and increasing the user's usage cost.

[0058] Continuing with the above reverse osmosis filter element 2 with a flux of 800G, the filter element life ratio is calculated according to the above formula. The total water output is preset to be 8000L, B = 8000L; the preset service life is 4 years, A = 4*365 days; when the water purifier is used for the 365th day, that is, the end time period T(365) = 365, the purified water volume recorded by the flow meter is 3000L, that is, the cumulative water output Q(365) = 3000L.

[0059] When the user is accustomed to a short interval between water collection and selects the high-frequency application scenario gear of the water purifier, such as a public water purifier, the value of the constant parameter K is set to be no less than 1 so that the filter life ratio is close to the usage scenario of evaluating the filter life based on the amount of purified water.

[0060] For example, when the value of K is 1, the life span of the reverse osmosis filter element 2 is:

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

[0062] When the user is accustomed to taking water at longer intervals, the water purifier is selected for low-frequency application scenarios, such as household water purifiers. The value of the constant parameter K is set to be less than 1 so that the filter life ratio is close to the usage scenario of evaluating the filter life based on usage time.

[0063] For example, when the value of K is 0.1, the life span of the reverse osmosis filter element 2 is:

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

[0065] Among them, the proportion of life calculated only by usage time is 1-(365 / 4*365)=0.75; the proportion of life calculated only by water output is 1-(3000 / 8000)=0.625.

[0066] By comparison, it can be seen that when the same amount of purified water is produced in the same time, if the water purifier is used more frequently, the life percentage of the reverse osmosis filter element 2 tends to evaluate the service life of the filter element based on the amount of purified water; if the water purifier is used less frequently, the life percentage of the reverse osmosis filter element 2 tends to be closer to the factory default service life of the filter element. Therefore, the life percentage of the filter element calculated by taking into account both the water output and the usage time can more accurately reflect the usage status of the reverse osmosis filter element 2 in the actual scenario. That is, the life percentage of the filter element calculated by adjusting the specific value of the constant parameter K set by the gear setting of the water purifier application scenario is more in line with the actual application of the water purifier, and can more accurately reflect the current life percentage of the filter element, which is conducive to maximizing the utilization rate of the filter element.

[0067] It should be noted that the specific numerical value of the above-mentioned constant parameter K is selected only to illustrate that the correction method is applicable to different application scenarios. In actual applications, technical personnel in this field can flexibly adjust and set more than two application scenario gears corresponding to the constant parameter K according to specific application scenarios to meet actual needs.

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

[0069] According to the comparison result, the life status information of the reverse osmosis filter element 2 is selectively displayed.

[0070] If the life span ratio is greater than the preset value, the remaining use time of the reverse osmosis filter element 2 is displayed according to the life span ratio and the preset use period, and / or the remaining water output of the reverse osmosis filter element 2 is displayed according to the life span ratio and the preset total water output. If the life span ratio is not greater than the preset value, the replacement reminder information of the reverse osmosis filter element 2 is displayed.

[0071] Exemplarily, 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 life proportion of the filter element calculated according to the above formula is 0.5, the life proportion (0.5) is greater than the preset value (0.02), and the remaining use time of the reverse osmosis filter element 2 is calculated to be 730 days according to the product of the life proportion (0.5) and the preset service life (4*365 days), and the remaining water output of the reverse osmosis filter element 2 is calculated to be 4000 L according to the product of the life proportion (0.5) and the preset total water output (8000 L). The information of the remaining use time (730 days) and the remaining water output (4000 L) is displayed on the display screen of the water purifier through the controller 6 to feedback the current use status of the reverse osmosis filter element 2 of the water purifier.

[0073] It should be noted that, according to actual applications, those skilled in the art may only calculate the remaining use time of the reverse osmosis filter element 2 by multiplying the lifespan ratio by the preset use period to feed back the current use status of the reverse osmosis filter element 2, or may only calculate the remaining water output of the reverse osmosis filter element 2 by multiplying the lifespan ratio (0.5) by the preset total water output (8000L) to feed back the current use status of the reverse osmosis filter element 2. Of course, it is preferred that the remaining use time and the remaining water output are simultaneously fed back to the current use status of the reverse osmosis filter element 2, so that the user can know the current use status of the reverse osmosis filter element 2 from multiple dimensions.

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

[0075] In addition, it should be noted that the setting and selection of specific values ​​of parameters such as the above-mentioned preset values, flux of the reverse osmosis filter element 2, pure water production rate, preset total water output and preset service life are only for illustrating the calculation process of the correction method.

[0076] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle 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 fall within the protection scope of the present invention.

Claims

1. A water purifier, characterized in that: The invention comprises a controller (6) and a booster pump (4) and a reverse osmosis filter element (2) which are connected in sequence. A first control valve (71) and a flow detection device (8) are provided on a pipeline connected to the pure water outlet of the reverse osmosis filter element (2). The controller (6) regulates the synchronous switching of the booster pump (4) and the first control valve (71).

2. The water purifier according to claim 1, characterized in that: The first control valve (71) is a pulse solenoid valve.

3. The 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 water purifier according to claim 1, characterized in that: The flow detection device (8) is located downstream of the first control valve (71).

5. A method for correcting the filter life of a water purifier according to any one of claims 1 to 4, characterized in that: The correction method comprises: Obtaining a preset service life and a preset total water output of the reverse osmosis filter element (2), wherein the preset service life is recorded as A and the preset total water output is recorded as B; Obtaining the cumulative amount of purified water output by the reverse osmosis filter element (2) within a cut-off time period, wherein the cumulative amount of purified water output is recorded as Q(t), and the cut-off time period is recorded as T(t); A preset function is set, which is recorded as F; according to the preset function, the preset total water output is converted into a first usage time, and the first usage time is recorded as F(B); according to the preset function, the cumulative water output is converted into a second usage time, and the second usage time is recorded as F(Q(t)); According to the formula 1-(T(t)+F(Q(t))) / (A+F(B)), the life span of the reverse osmosis filter element (2) is calculated.

6. The method for correcting the filter element life of a water purifier according to claim 5, characterized in that: 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 recorded as KB, and the second usage time is recorded as K(Q(t)); According to the formula 1-(T(t)+K(Q(t))) / (A+KB), the life span of the reverse osmosis filter element (2) is calculated.

7. The method for correcting the filter element life of a water purifier according to claim 6, characterized in that: The water purifier includes at least two different application scenario gears, and the value of the constant parameter K corresponds to the application scenario gear.

8. The method for correcting the filter element life of a water purifier according to claim 5, characterized in that: The correction method also includes: Comparing the life span ratio with a preset value; According to the comparison result, the life status information of the reverse osmosis filter element (2) is selectively displayed.

9. The method for correcting the filter element life of a water purifier according to claim 8, characterized in that: The step of "selectively displaying the life status information of the reverse osmosis filter element (2) according to the comparison result" specifically includes: If the life span ratio is greater than the preset value; The remaining usage time of the reverse osmosis filter element (2) is displayed according to the life span ratio and the preset usage period. and / or The remaining water output of the reverse osmosis filter element (2) is displayed according to the life span percentage and the preset total water output.

10. The method for correcting the filter element life of a water purifier according to claim 8, characterized in that: The step of "selectively displaying the life status information of the reverse osmosis filter element (2) according to the comparison result" specifically includes: If the life span ratio is not greater than the preset value; Then, a replacement reminder message for the reverse osmosis filter element (2) is displayed.

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