CN115490346B - Recommended method of filter elements for water purifiers and water purifiers - Google Patents

Abstract

The invention relates to the technical field of water purification equipment, and specifically provides a method for recommending a filter element for a water purifier and a water purifier, aiming to solve the problem that the existing water purifier cannot adjust the filter element according to the local water quality when the filter element life expires. Recommendations and selections based on the needs of users, affecting the user experience. For this purpose, the method for recommending a filter element of the present invention includes: acquiring the flow attenuation rate of the filter element of the water purifier; acquiring the type of the filter element corresponding to the flow attenuation rate; and recommending the filter element type to the user. Through such settings, the water purifier of the present invention can recommend to the user a filter element type that is compatible with the flow rate attenuation rate according to the flow rate attenuation rate of the filter element when the filter element life is expired. Filter elements with good anti-pollution performance cause waste of cost; on the other hand, prevent the use of filter elements with poor anti-pollution performance in areas with poor water quality, resulting in substandard water quality, thereby improving user experience.

Description

Recommended method of filter elements for water purifiers and water purifiers

technical field

The invention relates to the technical field of water purification equipment, and specifically provides a filter element recommendation method for a water purifier and the water purifier.

Background technique

At present, in the field of household water purifiers, the water purifiers produced by most companies will not be selectively sold in different regions, but in fact, the water quality in different regions of China varies greatly, which will lead to the filter element of the same water purifier Actual service life will vary. Under normal circumstances, the water purifier factory will set the filter element replacement cycle or filter life parameters for this water purifier, such as: the pretreatment filter element, the replacement cycle is 3 to 6 months, and the RO membrane filter element replacement cycle is 2~ 3 years.

In fact, during the user’s use, the actual life of the same water purifier in areas with good water quality will far exceed the nominal life, that is to say, when the whole machine sends out a life reminder, the actual filter element can still be used normally, resulting in waste of resources and poor water quality. Bad areas will have the opposite.

Existing water purifiers generally can only replace the same type of filter element provided by the water purifier manufacturer when the life of the filter element expires. It is impossible to choose the filter element according to the local water quality requirements. High anti-pollution performance is not required in places with good water quality. The filter element can meet the performance requirements of the whole machine. In places with poor water quality, there may be cases where the filter element does not meet the performance requirements of the whole machine due to pollution and clogging before the declared life of the filter element, which leads to cost waste and water discharge. The problem of substandard water quality affects the user experience.

Contents of the invention

The present invention aims to solve the above technical problems, that is, to solve the problem that the existing water purifier cannot recommend and select the filter element according to the local water quality when the filter element life expires, which affects the user's experience.

In a first aspect, the present invention provides a method for recommending a filter element for a water purifier, the method for recommending a filter element includes: obtaining the flow attenuation rate of the filter element of the water purifier; obtaining the filter element corresponding to the flow attenuation rate Type; recommend the filter element type to the user.

In the preferred technical solution of the filter element recommendation method above, the step of "obtaining the flow attenuation rate of the filter element of the water purifier" specifically includes: acquiring the total water production Q of the filter element; acquiring the water production rate V of the filter element; According to the total water production Q and the water production rate V, the flow decay rate is calculated.

In the preferred technical solution of the filter element recommendation method above, the specific step of "obtaining the filter element type corresponding to the flow attenuation rate" includes: comparing the flow attenuation rate with the first preset value and the second preset value respectively Values are compared; according to the comparison result, the type of the filter element is determined; wherein, the first preset value is smaller than the second preset value.

In the preferred technical solution of the filter element recommendation method above, the specific step of "determining the filter element type according to the comparison result" includes: if the flow attenuation rate is less than the first preset value, then determine that the filter element type is A class filter element; if the flow attenuation rate is greater than or equal to the first preset value but less than the second preset value, it is determined that the filter element type is a B-type filter element; if the flow attenuation rate is greater than or equal to the set If the second preset value is used, then it is determined that the type of the filter element is a C-type filter element; wherein, the anti-pollution ability of the A-type filter element is greater than the anti-pollution ability of the B-type filter element, and the anti-pollution ability of the B-type filter element is greater than The anti-pollution ability of the C-type filter element.

In the preferred technical solution of the filter element recommendation method above, the filter element is a reverse osmosis membrane filter element, and the specific steps of "calculating the flow rate attenuation rate according to the total water production volume Q and the water production rate V" include: The water production rate V is corrected to obtain a corrected water production rate V0; the flow decay rate is calculated according to the total water production Q and the corrected water production rate V0.

In the preferred technical solution of the filter element recommendation method above, the specific steps of "correcting the water production rate V to obtain the corrected water production rate V0" include: obtaining the temperature T of the water outlet end of the reverse osmosis membrane filter element; Acquiring a temperature correction coefficient a corresponding to the temperature T; calculating the corrected water production rate V0 according to the water production rate V and the temperature correction coefficient a.

In the preferred technical solution of the filter element recommendation method above, the specific steps of "calculating the corrected water production rate V0 according to the water production rate V and the temperature correction coefficient a" include: V0=V×a.

In the preferred technical solution of the above-mentioned filter element recommendation method, the water purifier communicates with the user's mobile device, and the step of "recommending the filter element type to the user" includes: sending the filter element type to the mobile device .

In a preferred technical solution of the above filter element recommendation method, the water purifier further includes a display screen, and the step of "recommending the filter element type to the user" includes: displaying the filter element type on the display screen.

In a second aspect, the present invention provides a water purifier. The water purifier of the present invention includes a controller configured to execute the control method described above.

In the case of adopting the above technical solution, the water purifier of the present invention can recommend to the user the type of filter element that is compatible with the flow rate attenuation rate according to the flow rate attenuation rate of the filter element when the filter element life is expired. Good areas use filter elements with good anti-pollution performance, resulting in waste of cost; on the other hand, to prevent the use of filter elements with poor anti-pollution performance in areas with poor water quality, resulting in substandard water quality, intelligent recommendation can be realized to remind users to replace corresponding The filter element with demand characteristics can be customized, which can not only meet the needs of users but also avoid unnecessary waste, thereby improving the user experience.

Further, by detecting the total water production of the filter element and the corresponding water production rate, the flow attenuation rate is calculated according to the total water production and the water production rate, and the flow attenuation of the filter element is calculated according to the difference between the flow rate of the filter element and the corresponding water production difference Compared with the rate method, the form of calculating the flow attenuation rate according to the total water production and water production rate can perform curve fitting through multiple sets of total water production and water production rate data, and the flow attenuation can be performed by calculating the slope of the fitting curve The calculation of the rate makes the calculated flow attenuation rate more accurate, thereby improving the accuracy of the judgment of the filter element type.

Still further, by comparing the flow attenuation rate of the filter element with the first preset value and the second preset value respectively, the method of determining the filter element type according to the comparison result is different from determining the filter element directly according to the flow attenuation rate based on experience or experiments. Compared with the situation of different types, the relationship between the calculated flow attenuation rate and the preset value can be accurately judged, so that the type of filter element recommended for the user can be judged more accurately.

Still further, the first preset value and the second preset value divide the flow decay rate value into multiple preset flow decay rate intervals, and determine the type of filter element according to the preset flow decay rate intervals where the flow decay rate is located, which can be more Intuitively reflect the type of filter element corresponding to the flow attenuation rate, so that users can easily understand the filter element recommendation scheme and purchase filter elements suitable for the filter element recommendation scheme.

Furthermore, by correcting the water production rate V of the reverse osmosis membrane filter element, and calculating the flow attenuation rate according to the total water production Q and the corrected water production rate V0, the flow attenuation rate of the filter element can be calculated more accurately, In this way, it can more truly reflect the type of filter element that meets the characteristics of the user's needs, and further improve the user's experience.

Furthermore, by sending the filter element type to the mobile device, the user can view the recommended filter element type of the water purifier at any time through the mobile device, thereby facilitating the user to purchase a filter element suitable for the recommended type, and further improving the user's usage experience.

Still further, by displaying the type of the filter element on the display screen, it is convenient for the user to view the recommended filter element type more intuitively and conveniently, thereby facilitating the user to purchase a filter element suitable for the recommended filter element type.

In addition, the water purifier further provided by the present invention on the basis of the above-mentioned technical solution adopts the filter element recommendation method introduced above, and further possesses the beneficial effects of the above-mentioned filter element recommendation method. Compared with the water purifier before improvement , the water purifier of the present invention can select the filter element according to the demand of the local water quality, realize the intelligent recommendation and remind the user to replace the filter element with the corresponding demand characteristics, so that the use cost of the water purifier is lower, the effluent water quality is better, and the user experience is better. good.

Description of drawings

Describe preferred embodiment of the present invention below in conjunction with accompanying drawing, in the accompanying drawing:

Fig. 1 is the structural representation of water purifier of the present invention;

Fig. 2 is the flow chart of filter element recommendation method of the present invention;

Fig. 3 is the flow chart of the embodiment of filter element recommendation method of the present invention;

Fig. 4 is the corresponding table between the water production rate and the total water production of the pretreatment filter element of the present invention;

Fig. 5 is a fitting curve diagram of the water production rate and the total water production of the pretreatment filter element of the present invention;

Fig. 6 is a correspondence table between the water production rate of the reverse osmosis membrane filter element of the present invention, the corrected water production rate and the total water production;

Fig. 7 is a fitting curve of the water production rate and the total water production volume after correction of the reverse osmosis membrane filter element of the present invention.

List of reference signs:

1. Shell; 11. Water inlet; 12. Pure water outlet; 13. Waste water outlet; 2. Pretreatment filter element; 21. First water inlet; 22. First water outlet; 3. Reverse osmosis membrane filter element; 31. Second water inlet; 32. Second water outlet; 33. Third water outlet; 4. Water inlet; 5. Connecting pipe; 51. Water pump; 52. First flow detection component; 6. Pure water outlet ; 61, the second flow detection component; 62, the temperature detection component; 7, the waste water outlet pipe.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand 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.

It should be noted that in the description of the present invention, the terms "inner" and "lower" are based on the direction or positional relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must Having a particular orientation, being constructed and operating in a particular orientation, and therefore not to be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In addition, it should be noted that, in the description of the present invention, unless otherwise specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or one-piece connection. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Please refer to FIG. 1 , which is a schematic structural view of the water purifier of the present invention.

As shown in Figure 1, the water purifier of the present invention includes a housing 1, a pretreatment filter element 2 arranged in the housing 1, a reverse osmosis membrane filter element 3 and a water pump 51, and the housing 1 has a water inlet 11, a pure water Outlet 12 and waste water outlet 13.

As shown in Figure 1, the water inlet end of the pretreatment filter element 2 is marked as the first water inlet end 21, the water outlet end of the pretreatment filter element 2 is marked as the first water outlet end 22, and the water inlet end of the reverse osmosis membrane filter element 3 is marked as The second water inlet 31 and the pure water outlet of the reverse osmosis membrane filter element 3 are marked as the second water outlet 32 , and the waste water outlet of the reverse osmosis membrane filter element 3 is marked as the third water outlet 33 .

As shown in Figure 1, the first water inlet 21 of the pretreatment filter element 2 is communicated with the water inlet 11, and the first water outlet 22 of the pretreatment filter element 2 is communicated with the second water inlet 31 of the reverse osmosis membrane filter element 3. The second water outlet 32 of the osmotic membrane filter element 3 is in communication with the pure water outlet 12, the third water outlet 33 of the reverse osmosis membrane filter element 3 is in communication with the waste water outlet 13, and the water pump 51 is used to transfer water from the water inlet 11 to the housing 1. The water inside is transported from the second water inlet end 31 of the reverse osmosis membrane filter element 3 to the second water outlet end 32 of the reverse osmosis membrane filter element 3 .

As shown in Figure 1, the water purifier of the present invention also includes a water inlet pipe 4, a connecting pipe 5, a pure water outlet pipe 6 and a waste water outlet pipe 7, one end of the water inlet pipe 4 communicates with the water inlet 11, and the other end of the water inlet pipe 4 It communicates with the first water inlet 21 of the pretreatment filter element 2, one end of the connecting pipe 5 communicates with the first water outlet 22 of the pretreatment filter element 2, and the other end of the connecting pipe 5 communicates with the second water inlet of the reverse osmosis membrane filter element 3. End 31 is communicated, and one end of pure water outlet pipe 6 is communicated with the second water outlet end 32 of reverse osmosis membrane filter element 3, and the other end of pure water outlet pipe 6 is communicated with pure water outlet 12, and water pump 51 is arranged on connecting pipe 5, One end of the waste water outlet pipe 7 communicates with the third water outlet end 33 of the reverse osmosis membrane filter element 3 , and the other end of the waste water outlet pipe 7 communicates with the waste water outlet 13 .

It should be noted that, in practical application, the water pump 51 is not limited to be arranged on the connecting pipe 5, for example, the water pump 51 can also be arranged on the water inlet pipe 4, etc. Adjustments and changes that do not deviate from the principle and scope of the present invention should be included in the protection scope of the present invention.

Preferably, as shown in Figure 1, the water pump 51 is arranged on the connecting pipe 5, the water inlet end of the water pump 51 communicates with the first water outlet end 22 of the pretreatment filter element 2, and the water outlet end of the water pump 51 communicates with the reverse osmosis membrane filter element 3 The second water inlet port 31 is connected.

Referring next to FIG. 2 , FIG. 2 is a flow chart of the filter element recommendation method of the present invention.

As shown in Figure 2, the filter element recommendation method of the present invention comprises the following steps:

S1000: Obtain the flow attenuation rate of the filter element of the water purifier;

S2000: Obtain the type of filter element corresponding to the flow attenuation rate;

S3000: Recommend the type of filter element to the user.

Through such settings, the water purifier of the present invention can recommend to the user the type of filter element that is compatible with the flow rate attenuation rate according to the flow rate attenuation rate of the filter element when the filter element life is expired. The use of filter elements with good anti-pollution performance results in waste of cost; on the other hand, it prevents the use of filter elements with poor anti-pollution performance in areas with poor water quality and causes the problem of substandard water quality, so that intelligent recommendations can be realized to remind users to replace corresponding demand features The filter element can be customized, which can not only meet the needs of users, but also avoid unnecessary waste and improve the user experience.

It should be noted that in practical applications, the corresponding manufacturers need to provide a variety of filter elements with different performances and prices for users to choose, and the interface of the filter element is consistent with the first installed filter element of the whole machine to ensure smooth installation and use.

For example, the manufacturer provides a variety of filter elements with different anti-pollution performance. The price of the filter element with better anti-pollution performance is relatively high. Correspondingly, the price of the filter element with poor anti-pollution performance is relatively low. When in use, the flow attenuation rate of the filter element is small. It is recommended that users replace the filter element with a lower price and poorer anti-pollution performance of the filter element. This can not only ensure the performance of the water purifier but also reduce the replacement cost of the filter element, thereby improving user satisfaction and experience. .

It should be noted that, in practical applications, the filter element recommendation method of the present invention is suitable for filter element type recommendation of pretreatment filter element 2, such as pre-filter, PP cotton filter element, or, the filter element recommendation method of the present invention is also applicable to precision filtration The filter element type recommendation of the filter element, such as the reverse osmosis membrane filter element 3, etc., the adjustment and change of the specific type of the filter element does not deviate from the principle and scope of the present invention, and should be included within the protection scope of the present invention.

It should also be noted that, in practical applications, the filter element recommendation method of the present invention is suitable for data acquisition and analysis of the flow attenuation rate of the filter element during the use of the whole machine after the first installation, and when the filter element life expires, the reminder, Calculate the flow attenuation rate index of the filter element, and recommend the user to replace the filter element with corresponding demand characteristics according to the index, or it can also be applied to the data acquisition and analysis of the flow attenuation rate of the filter element after the water purifier has been used for a period of time. And when the life of the filter element expires, calculate the flow attenuation rate index of the filter element, and recommend the user to replace the filter element with corresponding demand characteristics according to the index, etc. This flexible adjustment and change does not deviate from the principles and principles of the present invention. range, should be included within the protection scope of the present invention.

Preferably, during the use process after the first installation of the whole machine, the flow attenuation rate of the filter element is acquired and analyzed, and when the life of the filter element expires, the index of the flow attenuation rate of the filter element is calculated, and the user is recommended according to the index Replace the filter element with the corresponding characteristics.

With such a setting, after the filter element is installed for the first time, the flow attenuation rate data of the filter element can be obtained, and after the life of the first installed filter element expires, it is recommended that the user replace the filter element with corresponding characteristics, so as to better avoid water quality. The waste of cost caused by the use of filter elements with good anti-pollution performance in areas can better avoid the problem of substandard water quality caused by the use of filter elements with poor anti-pollution performance in areas with poor water quality.

It should be noted that in practical applications, those skilled in the art can monitor the total water production of the filter element, and compare the detected total water production with the preset total water purification in the controller program. When the water volume value is equal to the preset value, it is considered that the life of the filter element has expired, and the water purifier will give a reminder to replace the filter element, or it can also monitor the use time of the filter element and compare the use time with the preset use time of the filter element. When the use time of the filter element reaches the preset use time of the filter element, it is considered that the life of the filter element has expired, and the water purifier gives a reminder to replace the filter element, etc. This flexible adjustment and change does not deviate from the principle and scope of the present invention. All should be included within the protection scope of the present invention.

Preferably, by monitoring the total water production volume of the filter element, and comparing the monitored total water production volume of the filter element with the preset total water purification volume in the controller, if it is detected that the total water production volume is equal to the preset total water purification volume, It is considered that the life of the filter element has expired and a new filter element needs to be replaced. At the same time, when reminding the user to replace the filter element, the filter element type corresponding to the flow attenuation rate data can be obtained according to the flow attenuation rate data of the filter element, and the filter element type is recommended to user.

It should be noted that in practical applications, those skilled in the art can directly determine the type of the filter element according to the flow rate attenuation rate based on experience or experiments, or the flow rate attenuation rate of the filter element can be compared with the first preset value and the second preset value respectively. The preset value is compared, and the type of the filter element is determined according to the comparison result, etc. This kind of flexible adjustment and change does not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

Referring next to FIG. 3 , FIG. 3 is a flow chart of an embodiment of the filter element recommendation method of the present invention.

Preferably, as shown in Figure 3, the specific steps of "obtaining the filter element type corresponding to the flow decay rate" include:

S2100: Comparing the flow decay rate with the first preset value and the second preset value respectively;

S2200: Determine the filter element type according to the comparison result;

Wherein, the first preset value is smaller than the second preset value.

With such a setting, compared with the situation where the type of the filter element is determined directly according to the flow rate attenuation rate based on experience or experiments, by comparing the flow rate attenuation rate of the filter element with the first preset value and the second preset value respectively, according to the comparison Results The method of determining the type of filter element can accurately determine the relationship between the calculated flow rate attenuation rate and the preset value, so that the type of filter element recommended for users can be more accurately determined.

Preferably, as shown in Figure 3, the specific steps of "determining the filter element type according to the comparison result" include:

S2210: If the flow attenuation rate is less than the first preset value, determine that the type of the filter element is a type A filter element;

S2220: If the flow attenuation rate is greater than or equal to the first preset value but less than the second preset value, determine that the type of the filter element is a type B filter element;

S2230: If the flow attenuation rate is greater than or equal to the second preset value, determine that the type of the filter element is a type C filter element;

Among them, the anti-pollution ability of the A-type filter element is greater than that of the B-type filter element, and the anti-pollution ability of the B-type filter element is greater than that of the C-type filter element.

Through such setting, the first preset value and the second preset value divide the value of the flow attenuation rate into multiple preset flow attenuation rate intervals, and determine the type of filter element according to the preset flow attenuation rate interval where the flow attenuation rate is located, which can It more intuitively reflects the filter element type corresponding to the flow attenuation rate, so that it is convenient for users to understand the filter element recommendation scheme and purchase filter elements suitable for the filter element recommendation scheme.

It should be noted that in practical applications, it is not limited to setting the two preset values described above. Correspondingly, the types of filter elements are divided into three types: A, B, and C. For example, only one preset value can also be set , correspondingly, the type of the filter element is divided into two categories, A type and B type, or N preset values can also be set (wherein, N≥3 and N is an integer), correspondingly, the type of the filter element is divided into ( N+1) category, etc., such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention. Of course, preferably, two preset values are set, and correspondingly, the types of filter elements are divided into three types: A, B, and C.

It should be noted that in practical applications, those skilled in the art can set the water purifier to send the recommended filter element type to the user's mobile device through a communication connection with the user's mobile device, or it can also be used in the water purification process. Set up a display screen on the machine to display the recommended filter element type on the display screen, or, at the same time, display the recommended filter element type on the display screen and send it to the user's mobile device, etc., this flexible adjustment and Changes that do not deviate from the principle and scope of the present invention should be included in the protection scope of the present invention.

In a preferred situation, the water purifier also includes a display screen (not shown in the figure), and the step of "recommending the filter element type to the user" includes:

Shows the filter type to the display.

With such a setting, that is, by displaying the filter element type on the display screen, it is convenient for the user to view the recommended filter element type more intuitively and conveniently, so that it is convenient for the user to purchase a filter element suitable for the recommended filter element type.

In another preferred situation, the water purifier communicates with the user's mobile device, and the step of "recommending the type of filter element to the user" includes:

Send filter type to mobile device.

Through such a setting, the user can view the recommended type of the filter element of the water purifier through the mobile device at any time, thereby facilitating the user to purchase a filter element suitable for the recommended type, and further improving the user experience.

It should be noted that in practical applications, those skilled in the art can detect the flow value of the filter element at different water production times, and calculate the flow difference of the filter element between different water production times. The water production time difference can be used to calculate the attenuation rate of the filter element flow rate, or the filter element flow rate difference between different water production volumes can be calculated according to the filter element flow value detected at different water production volumes. According to the filter element flow rate difference and the corresponding water production volume Poor, get the attenuation rate of the filter element flow, or, you can also detect the flow value of the filter element and the total water production of the filter element at different water production times, and calculate the flow rate of the filter element according to the detected flow value of the filter element and the total water production of the filter element Attenuation rate, etc., the adjustment and change of the specific acquisition method of the flow attenuation rate of the filter element does not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

Preferably, the step of "obtaining the flow decay rate of the filter element of the water purifier" specifically includes:

Obtain the total water production Q of the filter element;

Obtain the water production rate V of the filter element;

According to the total water production Q and the water production rate V, the flow decay rate is calculated.

With such a setting, by detecting the total water production of the filter element and the corresponding water production rate, the flow attenuation rate is calculated according to the total water production and the water production rate, and the filter element is calculated according to the difference between the flow rate of the filter element and the corresponding water production difference. Compared with the method of flow attenuation rate, it can perform curve fitting through multiple sets of data of total water production and water production rate, and calculate the flow attenuation rate by calculating the slope of the fitting curve, making the calculated flow attenuation rate more accurate. Thereby improving the judgment accuracy of the filter element type.

Preferably, as shown in FIG. 1 , a first flow detection member 52 is provided on the connecting pipe 5 , and the total water production volume and water production rate of the filter element are obtained through the detection data of the first flow detection member 52 .

It should be noted that in practical applications, those skilled in the art can set the first flow detection member 52 as a flow meter, or can also set the first flow detection member 52 as a pulse counter, and so on. The adjustment and change of the specific setting type of a flow detection member 52 does not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

Preferably, the first flow detection member 52 is configured as a flow meter.

It should be noted that, in actual application, it is not limited to obtain the total water production of the filter element by setting the first flow detection member 52 on the connecting pipe 5, for example, the cumulative running time of the water pump 51 and the actual water pump 51 can also be obtained. Calculate the total water production of the filter element based on the water output, etc., the adjustment and change of the specific acquisition method of the total water production of the filter element does not deviate from the principle and scope of the present invention, and should be included within the protection scope of the present invention .

Preferably, the water production rate V of the filter element and the total water production Q of the filter element are detected at different water production times to obtain the total water production Q of multiple filter elements and the water production rate V of the filter element corresponding to the total water production Q, and Curve fitting is performed on the water production rate V and the total water production Q to obtain a fitting curve (as shown in Figure 5).

It should be noted that with the use of the filter element, the pollutants in the water will gradually block the membrane pores of the filter element, resulting in a decrease in the water production rate of the filter element, that is, as the total water production of the filter element increases, the water production rate of the filter element decreases.

The water production rate V and the total water production Q have an approximately linear relationship. As the total water production increases, the greater the decline in the water production rate V indicates that the water quality in this area is worse. Correspondingly, as the total water production Q increases The smaller the decrease of water production rate V is, the better the water quality in this area is.

It should be noted that, for the convenience of research, the fitting curve between the water production rate V and the total water production Q is regarded as a straight line for data processing.

The equation for setting the fitting curve of water production rate V and total water production Q is:

y=m×x+b;

Among them, m represents the attenuation rate of the water production rate of the filter element with the total water production, that is, m is the flow attenuation rate of the filter element.

The flow attenuation rate of the filter element can be calculated by calculating the slope m of the straight line y=m×x+b.

Then referring to Fig. 4 and Fig. 5, Fig. 4 is the corresponding table between the water production rate and the total water production of the pretreatment filter element of the present invention, and Fig. 5 is the simulation of the water production rate and the total water production volume of the pretreatment filter element of the present invention fit curve chart.

Exemplarily, as shown in Fig. 4 and Fig. 5, let the fitting curve equation be:

y=m ₁ ×x+b ₁ .

Calculate the slope m ₁ of the straight line to obtain the specific value of the flow attenuation rate, where the unit of m ₁ is ml/(min×L);

That is, the flow attenuation rate of the pretreatment filter element 2 is m ₁ .

Exemplarily, m ₁ =-0.139ml/(min×L).

It should be noted that since the flow rate of the reverse osmosis membrane filter element 3 has a large correlation with temperature, before calculating the flow decay rate of the reverse osmosis membrane filter element 3, it is necessary to first calculate the flow rate of the reverse osmosis membrane filter element 3. The water production rate is corrected, and the value of the flow decay rate is calculated according to the corrected water production rate and the total water production.

Preferably, the filter element is a reverse osmosis membrane filter element 3, and the specific steps of "calculating the flow decay rate based on the total water production Q and the water production rate V" include:

Correct the water production rate V to obtain the corrected water production rate V0;

Calculate the flow decay rate based on the total water production Q and the corrected water production rate V0.

Through such a setting, that is, by correcting the water production rate V of the reverse osmosis membrane filter element 3, and calculating the flow decay rate according to the total water production Q and the corrected water production rate V0, the reverse osmosis membrane can be calculated more accurately. The flow attenuation rate of the filter element 3 more truly reflects the type of filter element that meets the characteristics of the user's needs, and further improves the user experience.

Preferably, the specific steps of "correcting the water production rate V to obtain the corrected water production rate V0" include:

Obtain the temperature T of the second water outlet 32 of the reverse osmosis membrane filter element 3;

Obtain the temperature correction coefficient a corresponding to the temperature T;

According to the water production rate V and the temperature correction coefficient a, the corrected water production rate V0 is calculated.

By such setting, according to the temperature T of the second water outlet end 32 of the reverse osmosis membrane filter element 3, obtain the temperature of the water flowing through the reverse osmosis membrane filter element 3, and obtain the temperature of the water flowing through the reverse osmosis membrane filter element 3 The temperature correction coefficient a corresponding to the temperature can more accurately correct the water production rate of the reverse osmosis membrane filter element 3, thereby improving the calculation accuracy of the flow decay rate.

It should be noted that, in practical applications, those skilled in the art can install a temperature detection component on the pure water outlet pipe 6, and obtain the temperature T of the water outlet end of the reverse osmosis membrane filter element 3 through the numerical value of the temperature detection component, or, also can A temperature detection member is set at the pure water outlet 12, and the temperature T of the second water outlet end 32 of the reverse osmosis membrane filter element 3 is obtained by the numerical value of the temperature detection member, etc., this second water outlet to the reverse osmosis membrane filter element 3 The adjustment and change of the specific way of obtaining the temperature T of the end 32 does not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

It should also be noted that, in practical applications, those skilled in the art can obtain the reverse osmosis membrane filter element 3 by setting the second flow detection member 61 on the pure water outlet pipe 6, and by the data of the second flow detection member 61. Water production rate V, alternatively, a temperature flow detection component can also be set on the pure water outlet pipe 6, and the water production rate V of the reverse osmosis membrane filter element 3 and the second value of the reverse osmosis membrane filter element 3 can be obtained simultaneously through the temperature flow detection component. The temperature T of the water outlet 32, etc., this kind of flexible adjustment and change does not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

Preferably, as shown in Figure 1, a second flow detection member 61 and a temperature detection member 62 are provided on the pure water outlet pipe 6, and the water production rate of the reverse osmosis membrane filter element 3 is obtained through the data of the second flow detection member 61 V, the temperature T of the second water outlet end 32 of the reverse osmosis membrane filter element 3 is obtained through the value of the temperature detection member 62 .

It should be noted that in practical applications, those skilled in the art can set the temperature detection member 62 as a temperature sensor, or can also set the temperature detection member 62 as a thermometer, etc. The adjustment and change of the setting type do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

Preferably, the temperature detection member 62 is provided as a temperature sensor.

It should be noted that the temperature correction coefficient a corresponding to the temperature T of the second water outlet end 32 of the reverse osmosis membrane filter element 3 can be obtained according to the temperature correction coefficients at different temperatures of the reverse osmosis membrane filter element 3 provided by the filter element manufacturer For example, when the whole machine leaves the factory, the temperature correction coefficients at different temperatures of the reverse osmosis membrane filter element 3 are entered into the controller in advance, so as to facilitate the acquisition of the temperature corresponding to the temperature T of the water outlet end of the reverse osmosis membrane filter element 3 Correction factor a.

Preferably, the specific steps of "calculating the corrected water production rate V0 according to the water production rate V and the temperature correction coefficient a" include:

V0=V×a.

Next, referring to Fig. 6 and Fig. 7, Fig. 6 is a correspondence table between the water production rate V of the reverse osmosis membrane filter element of the present invention, the corrected water production rate V0 and the total water production Q, and Fig. 7 is the reverse osmosis of the present invention The fitting curve of the water production rate V0 and the total water production Q after the correction of the osmotic membrane filter element.

Exemplarily, as shown in Fig. 6 and Fig. 7, let the fitting curve equation be:

y=m ₂ ×x+b ₂ ;

Calculate the slope _m2 of the straight line to get the specific value of the flow decay rate, where the unit of _m2 is ml/(min×L);

That is, the flow attenuation rate of the reverse osmosis membrane filter element 3 is m ₂ .

Exemplarily, m ₂ =-0.054ml/(min×L).

Set the first preset value to A1=-0.100ml/(min×L), the second preset value to A2=-0.010ml/(min×L), if m<A1, then the type of filter element corresponding to m It is class A; if A1≤m<A2, then the type of filter element corresponding to m is class B; if m≥A2, then the type of filter element corresponding to m is class C.

The specific embodiment of the method recommended for the pretreatment filter element 2 of the present invention will be introduced in detail below in combination with several situations.

Case 1: If m ₁ =-0.139ml/(min×L), then m ₁ <A1, then the filter element type corresponding to the flow attenuation rate m ₁ is class A, that is, the recommended type of pretreatment filter element 2 is class A , its anti-pollution performance is better. Correspondingly, the price of pretreatment filter element 2 is higher, which also shows that the water quality in this area is poor. When the filter element is blocked, the flow rate and other performance requirements of the whole machine cannot be met due to the blockage of the filter element. Moreover, the problem of substandard effluent water quality caused by the blockage of the filter element can be avoided.

Situation 2: If m ₁ =-0.100ml/(min×L), then m ₁ =A1, then the filter element type corresponding to the flow attenuation rate m ₁ is Class B, that is, the recommended type of pretreatment filter element 2 is Class B , its anti-pollution performance is moderate. Correspondingly, the price of pretreatment filter element 2 is also moderate, which also shows that the water quality in this area is moderate. Using a filter element with moderate anti-pollution performance can avoid the cost caused by using a filter element with high anti-pollution performance. Waste, and can avoid the use of filter elements with low anti-pollution performance, resulting in substandard effluent water quality.

Case 3: If m ₁ =-0.005ml/(min×L), then m ₁ ≥ A2, then the type of filter element corresponding to the flow attenuation rate m ₁ is class C, that is, the recommended type of pretreatment filter element 2 is class C , its anti-pollution performance is low, correspondingly, the price of pretreatment filter element 2 is also low, and it also shows that the water quality in this area is good, and the use of pretreatment filter element 2 with low anti-pollution performance can meet the performance needs of the whole machine , thereby reducing the cost waste of the pretreatment filter element 2.

The specific embodiments of the recommended method for the reverse osmosis membrane filter element 3 of the present invention will be described in detail below in conjunction with several situations.

Situation 1: If m ₂ =-0.158ml/(min×L), then m ₂ <A1, then the filter element type corresponding to the flow decay rate m ₂ is Class A, that is, the recommended type of reverse osmosis membrane filter element 3 is Class A has better anti-pollution performance, and correspondingly, the price of the reverse osmosis membrane filter element 3 is higher.

Situation 2: If m ₂ =-0.054ml/(min×L), then A1≤m ₂ <A2, then the filter element type corresponding to the flow decay rate m ₂ is Class B, which is the recommendation of reverse osmosis membrane filter element 3 The type is Class B, and its anti-pollution performance is moderate, and accordingly, the price of the reverse osmosis membrane filter element 3 is also moderate.

Situation 3: If m ₁ =-0.010ml/(min×L), then m ₁ =A2, then the filter element type corresponding to the flow attenuation rate m ₂ is class C, that is, the recommended type of reverse osmosis membrane filter element 3 is Class C has low anti-pollution performance, and correspondingly, the price of the reverse osmosis membrane filter element 3 is also low.

Preferably, the water purifier of the present invention further includes a controller (not shown in the figure), and the controller is configured to execute the filter element recommendation method introduced above.

It should be noted that in practical applications, those skilled in the art can configure the controller to communicate with the first flow detection component 52, the second flow detection component 61 and the temperature detection component 62, so as to realize the intelligent data of the water purifier. The controller can also be set to communicate with the display screen and the user's mobile device, so as to realize the intelligent reminder and intelligent recommendation of the filter element of the water purifier.

It should be noted that although the present invention uses the pretreatment filter element 2 and the reverse osmosis membrane filter element 3 as an example to introduce the filter element recommendation method of the present invention, it is not limited to the pretreatment filter element 2 and the reverse osmosis filter element described above. Membrane filter element 3 carries out filter element recommendation, for example, can also only recommend the filter element type of pretreatment filter element 2 according to the actual situation, or, also can only recommend the filter element type of reverse osmosis membrane filter element 3, etc., such Flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but those skilled in the art will easily understand that the protection scope 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 relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims (9)

1. A cartridge recommendation method for a water purifier, the cartridge recommendation method comprising:

acquiring the flow attenuation rate of a filter element of the water purifier;

acquiring a filter element type corresponding to the flow attenuation rate;

recommending the filter element type to a user;

the step of acquiring the flow attenuation rate of the filter element of the water purifier specifically comprises the following steps:

acquiring the total water yield Q of the filter element;

acquiring the water production rate V of the filter element;

calculating the flow attenuation rate according to the total water yield Q and the water yield rate V;

detecting the water production rate V of the filter element and the total water production Q of the filter element at different water production times to obtain the total water production Q of a plurality of groups of filter elements and the water production rate V of the filter element corresponding to the total water production Q, and performing curve fitting on the water production rate V and the total water production Q to obtain a fitting curve y=m×x+b;

wherein m represents the attenuation rate of the water production rate of the filter element along with the total water production, namely, m represents the flow attenuation rate of the filter element.

2. The cartridge recommendation method of claim 1, wherein the specific step of obtaining a cartridge type corresponding to the flow decay rate comprises:

comparing the flow attenuation rate with a first preset value and a second preset value respectively;

determining the type of the filter element according to the comparison result;

wherein the first preset value is smaller than the second preset value.

3. The cartridge recommendation method of claim 2, wherein the specific step of determining the cartridge type based on the comparison result comprises:

if the flow attenuation rate is smaller than the first preset value, determining that the filter element type is a type A filter element;

if the flow attenuation rate is greater than or equal to the first preset value but less than the second preset value, determining that the filter element type is a B-type filter element;

if the flow attenuation rate is greater than or equal to the second preset value, determining that the filter element type is a C-type filter element;

the anti-pollution capacity of the class A filter element is larger than that of the class B filter element, and the anti-pollution capacity of the class B filter element is larger than that of the class C filter element.

4. The method according to claim 1, wherein the filter element is a reverse osmosis membrane filter element, and the specific step of calculating the flow rate attenuation rate according to the total water yield Q and the water yield V comprises:

correcting the water production rate V to obtain a corrected water production rate V0;

and calculating the flow attenuation rate according to the total water yield Q and the corrected water yield V0.

5. The method of claim 4, wherein the specific step of correcting the water production rate V to obtain a corrected water production rate V0 comprises:

acquiring the temperature T of the water outlet end of the reverse osmosis membrane filter element;

acquiring a temperature correction coefficient a corresponding to the temperature T;

and calculating the corrected water production rate V0 according to the water production rate V and the temperature correction coefficient a.

6. The method according to claim 5, wherein the specific step of calculating the corrected water production rate V0 according to the water production rate V and the temperature correction coefficient a comprises:

V0=V×a。

7. the cartridge recommendation method according to any one of claims 1 to 6, wherein the water purifier is in communication with a mobile device of a user, the step of recommending the cartridge type to the user comprising:

the filter cartridge type is sent to the mobile device.

8. The cartridge recommendation method according to any one of claims 1 to 6, wherein the water purifier further comprises a display screen, the step of recommending the cartridge type to a user comprising:

and displaying the filter element type on the display screen.

9. A water purifier comprising a controller configured to perform the cartridge recommendation method of any one of claims 1 to 8.