Method and device for determining pre-membrane pressure of water purifier

Abstract

The invention relates to the technical field of household appliances, and provides a water purifier membrane front pressure determination method and device. The method comprises the following steps: determining the water inlet temperature of the water purifier; determining a target curve corresponding to the water inlet temperature; based on the target curve and the current power and rotating speed of the booster pump, the current membrane front pressure is determined; wherein the target curve is used for representing the corresponding relation between the membrane front pressure and the power and rotating speed of the booster pump. According to the method and the device for determining the pre-membrane pressure of the water purifier, the pre-membrane pressure can be determined by determining the target curve and the current power and the rotating speed of the booster pump, so that accurate measurement of the pre-membrane pressure is realized without additionally mounting a pressure sensor, the cost is remarkably reduced, and the stability and the reliability of a system are improved. In addition, the corresponding target curve is determined according to the water inlet temperature, the influence of the temperature is fully considered, and therefore the precision of the film front pressure result is guaranteed. Furthermore, the method realizes quick response, and ensures real-time performance optimization of the water purifier under a dynamic working condition.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a method and device for determining the membrane front pressure of a water purifier. Background Art

[0002] The membrane front pressure between the water purifier booster pump and the filter element has an important impact on the normal operation of the water purifier.

[0003] The existing technology for measuring the membrane front pressure is usually to install a pressure sensor in the water purifier. Since the pressure sensor is expensive and easily damaged, the membrane front pressure measurement is expensive and has poor stability. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a method for determining the pre-membrane pressure of a water purifier. This method addresses the high cost and poor stability of pressure sensors in the prior art, avoids the risk of pressure sensor failure, and effectively ensures the normal operation of the water purifier, the water quality, and the service life of the filter element.

[0005] A method for determining membrane front pressure of a water purifier according to an embodiment of the first aspect of the present invention includes: Determine the water inlet temperature of the water purifier; determining a target curve corresponding to the inlet water temperature; determining a current membrane front pressure based on the target curve, the current power and speed of the booster pump; The target curve is used to represent the corresponding relationship between the membrane front pressure and the power and speed of the booster pump.

[0006] The method for determining the membrane front pressure of a water purifier provided by the present invention can determine the membrane front pressure by determining the target curve, the current power and rotation speed of the booster pump, thereby achieving accurate measurement of the membrane front pressure without the need to install an additional pressure sensor. Compared with the traditional measurement method that relies on a pressure sensor, this method can significantly reduce costs, improve system stability and reliability, and solve the defects of the high cost and poor stability of pressure sensors in the prior art. In addition, the corresponding target curve is determined according to the inlet water temperature, and the influence of temperature is fully considered, thereby ensuring the accuracy of the membrane front pressure result. Furthermore, the method achieves rapid response, ensuring real-time performance optimization of the water purifier under dynamic working conditions, thereby effectively guaranteeing the normal operation of the water purifier, the quality of the water output and the service life of the filter element.

[0007] According to one embodiment of the present invention, the target curve is determined in the following manner: When the inlet water temperature is known, multiple sets of data to be fitted are obtained; Fitting the multiple sets of data to be fitted to obtain a target curve corresponding to the known inlet water temperature; Each set of data to be fitted includes a preset speed of the booster pump, a measured power value of the booster pump, and a measured value of the membrane front pressure corresponding to the preset speed and the measured power value.

[0008] The method for determining the membrane front pressure of a water purifier provided by this invention obtains multiple sets of data to be fitted at a known inlet water temperature and mathematically fits them to generate a target curve corresponding to a specific inlet water temperature, thereby ensuring stable operation and optimized performance of the water purifier under different temperature conditions. Furthermore, through flexible temperature step and speed settings, this method adapts to various usage scenarios, enhances the system's environmental adaptability, reduces maintenance frequency caused by sensor failure, and further improves the reliability and service life of the water purifier.

[0009] According to one embodiment of the present invention, the method further includes: interpolating the target curve corresponding to the first inlet water temperature and the target curve corresponding to the third inlet water temperature to obtain a target curve corresponding to the second inlet water temperature; Wherein, the first water inlet temperature is greater than the second water inlet temperature, and the second water inlet temperature is greater than the third water inlet temperature; or The first water inlet temperature is lower than the second water inlet temperature, and the second water inlet temperature is lower than the third water inlet temperature.

[0010] The method for determining membrane front pressure in a water purifier provided by this invention interpolates the target curves corresponding to the first and third inlet water temperatures to generate a target curve corresponding to the second inlet water temperature. This method accurately predicts membrane front pressure, significantly improving temperature adaptability and measurement flexibility. Compared with traditional methods that rely on fixed temperature measurements, this method avoids the need for expensive individual measurements for each temperature, further enhancing adaptability to ambient temperature fluctuations.

[0011] According to one embodiment of the present invention, fitting the multiple groups of data to be fitted includes: The plurality of groups of data to be fitted are fitted using a binary least squares method.

[0012] According to one embodiment of the present invention, the interpolation process includes: The target curve corresponding to the first inlet water temperature and the target curve corresponding to the third inlet water temperature are interpolated using a linear interpolation method.

[0013] According to one embodiment of the present invention, the target curve is: f(x,y)=ax+by+cx 2 +dxy+ey 2 +f in, f(x,y)Indicates membrane front pressure; x Indicates the boost pump speed; y Indicates the boost pump power; a 、 b 、 c 、 d 、 e 、 f is the fitting constant.

[0014] According to a second embodiment of the present invention, the present invention provides a device for determining membrane front pressure of a water purifier, comprising: A temperature determination module, used to determine the water inlet temperature of the water purifier; a curve determination module, configured to determine a target curve corresponding to the inlet water temperature; a membrane front pressure determination module, configured to determine a current membrane front pressure based on the target curve, the current power and speed of the booster pump; The target curve is used to represent the corresponding relationship between the membrane front pressure and the power and speed of the booster pump.

[0015] The method for determining the membrane front pressure of a water purifier provided by the present invention can determine the membrane front pressure by determining the target curve, the current power and rotation speed of the booster pump, thereby achieving accurate measurement of the membrane front pressure without the need to install an additional pressure sensor. Compared with the traditional measurement method that relies on a pressure sensor, this method can significantly reduce costs, improve system stability and reliability, and solve the defects of the high cost and poor stability of pressure sensors in the prior art. In addition, the corresponding target curve is determined according to the inlet water temperature, and the influence of temperature is fully considered, thereby ensuring the accuracy of the membrane front pressure result. Furthermore, the method achieves rapid response, ensuring real-time performance optimization of the water purifier under dynamic working conditions, thereby effectively guaranteeing the normal operation of the water purifier, the quality of the water output and the service life of the filter element.

[0016] According to an embodiment of the third aspect of the present invention, the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and runnable on the processor, wherein when the processor executes the computer program, the method for determining the front pressure of the water purifier membrane as described in the first aspect above is implemented.

[0017] According to a fourth aspect of the present invention, the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for determining the front pressure of the water purifier membrane as described in the first aspect above is implemented.

[0018] According to an embodiment of the fifth aspect of the present invention, the present invention further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the method for determining the membrane front pressure of a water purifier as described in the first aspect above.

[0019] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: The method for determining the membrane front pressure of a water purifier provided by the present invention can accurately construct the target curve by fitting multiple groups of data to be fitted using the binary least squares method, thereby significantly improving the scientificity and reliability of the membrane front pressure prediction.

[0020] In addition, the method for determining the membrane front pressure of a water purifier provided by the present invention interpolates the target curve functions corresponding to the first water inlet temperature and the third water inlet temperature using the linear interpolation method to generate a target curve function corresponding to the second water inlet temperature. The interpolation method adopted performs curve fitting and calculation based on temperature changes, which can accurately predict the membrane front pressure and significantly improve the temperature adaptability and measurement flexibility.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a flow chart of the method for determining the membrane front pressure of a water purifier provided by the present invention.

[0024] Figure 2 It is a schematic diagram of the process of determining the target curve provided by the present invention.

[0025] Figure 3 This is a schematic diagram of the relationship between the rotation speed and the membrane front pressure modeling provided by the present invention.

[0026] Figure 4 It is a structural schematic diagram of the water purifier membrane front pressure determination device provided by the present invention.

[0027] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are intended to illustrate the present invention but are not intended to limit the scope of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0029] Figure 1 Schematic diagram of the process of determining the membrane front pressure of a water purifier provided by the present invention, as shown in FIG. Figure 1 As shown, the method may include the following steps: Step 110: Determine the water inlet temperature of the water purifier; Step 120: Determine a target curve corresponding to the inlet water temperature; Step 130: Determine the current membrane front pressure based on the target curve, the current power and speed of the booster pump; The target curve is used to represent the corresponding relationship between the membrane front pressure and the booster pump power and speed.

[0030] It should be noted that the method for determining the membrane front pressure of a water purifier described above can be implemented by a water purifier (specifically, by a controller, for example), an embedded microprocessor, a dedicated computing device, or a mobile terminal loaded with water purifier application software. Unless otherwise specified, the following embodiments illustrate the method for determining the membrane front pressure of a water purifier according to the present invention using a water purifier as the implementation entity.

[0031] In step 110, the inlet water temperature refers to the temperature of the water flowing at the water purifier's inlet and is a key environmental parameter that influences the calculation of the membrane front pressure. The inlet water temperature can be measured manually or collected in real time using a temperature detection device installed near the water inlet. The collected data is then transmitted to the water purifier controller for processing.

[0032] In step 120, a target curve is fitted based on experimental data to characterize the relationship between membrane front pressure and booster pump power and speed. This target curve is a set of functions pre-stored in the water purifier. Based on the measured inlet water temperature, the controller selects a function curve that matches the current temperature.

[0033] In step 130, the membrane front pressure refers to the water pressure in front of the water purifier filter membrane located between the water purifier booster pump and the filter element, and is a key parameter for evaluating the operating status of the water purifier.

[0034] It should be noted that when the membrane front pressure is normal, the water flow rate and flow rate can be guaranteed, the service life of the filter element can be extended, and the purification effect can be guaranteed. When the membrane front pressure is abnormal, the water output and water quality will be affected, and the service life of the filter element will be shortened.

[0035] Specifically, in the actual operation of the water purifier, the real-time inlet water temperature is first measured by a temperature detection device installed at the water inlet. The collected temperature data is accurately transmitted to the water purifier controller and corrected to ensure the temperature value is accurate. Then, based on the measured real-time inlet water temperature, the target curve that best matches the temperature is called from multiple pre-stored target curves. This target curve represents the functional relationship between the membrane front pressure and the power and speed of the booster pump. Next, the current power and speed data of the booster pump are collected in real time, and these real-time data are substituted into the target curve for calculation, ultimately obtaining the current membrane front pressure value.

[0036] The method for determining the membrane front pressure of a water purifier provided by the present invention can determine the membrane front pressure by determining the target curve, the current power and rotation speed of the booster pump, thereby achieving accurate measurement of the membrane front pressure without the need to install an additional pressure sensor. Compared with the traditional measurement method that relies on a pressure sensor, this method can significantly reduce costs, improve system stability and reliability, and solve the defects of the high cost and poor stability of pressure sensors in the prior art. In addition, the corresponding target curve is determined according to the inlet water temperature, and the influence of temperature is fully considered, thereby ensuring the accuracy of the membrane front pressure result. Furthermore, the method achieves rapid response, ensuring real-time performance optimization of the water purifier under dynamic working conditions, thereby effectively guaranteeing the normal operation of the water purifier, the quality of the water output and the service life of the filter element.

[0037] In one embodiment, Figure 2 As shown, the target curve can be determined as follows: Step 210: Acquire multiple sets of data to be fitted when the inlet water temperature is known; Step 220: Fit multiple sets of data to be fitted to obtain a target curve corresponding to the known inlet water temperature; Each set of data to be fitted includes a preset speed of the booster pump, a measured power value of the booster pump, and a measured value of the membrane front pressure corresponding to the preset speed and the measured power value.

[0038] In step 210 , the known inlet water temperature is a variable that needs to be determined in advance during the fitting process and is used as a control variable for data collection to ensure the environmental consistency of the data to be fitted.

[0039] Specifically, the inlet water temperature can be controlled in steps of 15° C. The inlet water temperature step can also be adjusted to other intervals or continuous changes according to specific scenarios to adapt to different water purifier models or usage environments, and the present invention does not make specific limitations on this.

[0040] In step 220, the data to be fitted refers to a set of measured data related to the membrane front pressure of the water purifier, collected under specific experimental conditions, and used to establish a target curve to predict the membrane front pressure. The data to be fitted specifically includes the preset speed and power of the booster pump, as well as the measured membrane front pressure corresponding to these speeds and powers.

[0041] Specifically, the fitting process can adopt a variety of methods, such as linear regression, polynomial regression, binary least squares method, etc., and the appropriate function form can be selected according to the characteristics of the data, which can be a linear function, polynomial function, exponential function or logarithmic function, etc.

[0042] For example, the preset speed of the booster pump increases in intervals of 100 rpm. The preset speed of the booster pump can also be adjusted to other intervals or continuously according to specific scenarios to adapt to different water purifier models or usage environments, and the present invention does not make specific limitations on this.

[0043] The power measurement value can be obtained by measuring the input voltage and current of the booster pump, or directly using a power meter for real-time monitoring. The method for obtaining the power measurement value can also be adjusted according to the specific scenario, and the present invention does not specifically limit this.

[0044] Specifically, assuming a constant inlet water temperature, the booster pump's preset speed is first set to multiple increments within this constant temperature environment. The actual power and pressure in front of the membrane are then measured at different speeds. The resulting data are recorded as multiple sets of pre-fitted data to ensure that the operating characteristics at different speeds are covered. A fitting method is then used to process these pre-fitted data, calculate the fitting parameters, and generate a target curve corresponding to that temperature. This target curve accurately depicts the effects of speed and power on pressure in front of the membrane at a constant temperature.

[0045] As shown in Table 1, in a constant temperature environment of 9°C, the booster pump speeds were set at preset speeds of 500 rpm, 600 rpm, 700 rpm, 800 rpm, 900 rpm, 1000 rpm, 1100 rpm, 1200 rpm, and 1300 rpm. The experiment was conducted under controlled laboratory conditions, adjusting the booster pump speed individually while maintaining a constant ambient temperature. A power meter was used to monitor the booster pump input power in real time, and a pressure sensor was used to collect corresponding membrane front pressure data, ensuring that measurements at each speed were completed under stable operating conditions. A systematic test procedure was used during data acquisition to comprehensively record the operating characteristics at various speeds, providing complete and reliable basic data support for subsequent target curve fitting and performance analysis.

[0046] Table 1 Booster pump power and membrane front pressure at different speeds at 9°C Experimental data record sheet Table 2 shows the measured power and corresponding pre-membrane pressure values ​​for the booster pump at different speeds, in increments of 15°C, at a constant temperature of 24°C. The experimental data were collected using a power meter and pressure sensor. Under controlled laboratory conditions, the booster pump speed was adjusted incrementally from 500 rpm to 1300 rpm in 100-rpm increments. The data in Table 2 covers speeds from 500 rpm to 1300 rpm. The measured power and pre-membrane pressure values ​​show clear trends with speed, demonstrating the performance of the booster pump under varying load conditions and providing a robust experimental basis for constructing target curves.

[0047] Table 2 Booster pump power and membrane front pressure at different speeds at 24℃ Experimental data record sheet Table 3 shows the measured power and corresponding pre-membrane pressure values ​​for the booster pump at different speeds, in increments of 15°C, at a constant temperature of 39°C. The experimental data were collected using a power meter and pressure sensor. Under controlled laboratory conditions, the booster pump speed was adjusted incrementally from 500 rpm to 1300 rpm in 100-rpm increments. The data in Table 3 covers speeds from 500 rpm to 1300 rpm. The measured power and pre-membrane pressure values ​​show clear trends as the speed changes, demonstrating the performance of the booster pump under different load conditions and providing a sound experimental basis for the subsequent construction of target curves.

[0048] Table 3 Booster pump power and membrane front pressure at different speeds at 39°C Experimental data record sheet The method for determining the membrane front pressure of a water purifier provided by this invention obtains multiple sets of data to be fitted at a known inlet water temperature and mathematically fits them to generate a target curve corresponding to a specific inlet water temperature, thereby ensuring stable operation and optimized performance of the water purifier under different temperature conditions. Furthermore, through flexible temperature step and speed settings, this method adapts to various usage scenarios, enhances the system's environmental adaptability, reduces maintenance frequency caused by sensor failure, and further improves the reliability and service life of the water purifier.

[0049] In one embodiment, the method may further include: interpolating the target curve corresponding to the first inlet water temperature and the target curve corresponding to the third inlet water temperature to obtain a target curve corresponding to the second inlet water temperature; Wherein, the first water inlet temperature is greater than the second water inlet temperature, and the second water inlet temperature is greater than the third water inlet temperature; or, The first inlet water temperature is lower than the second inlet water temperature, and the second inlet water temperature is lower than the third inlet water temperature.

[0050] Understandably, inlet water temperatures often fall between known experimental temperatures. Directly measuring the target curve for each temperature is both costly and difficult to implement in practice. Therefore, interpolation can be used to calculate the target curve for the second inlet water temperature using the existing target curve data for the first and third inlet water temperatures. This interpolation technique allows the calculation of a target curve for any inlet water temperature, enabling accurate fitting of intermediate temperatures.

[0051] For example, under operating conditions with a first inlet water temperature of 24°C, a second inlet water temperature of 15°C, and a third inlet water temperature of 9°C, corresponding target curves were first generated based on experimental data at constant temperatures of 24°C and 9°C, respectively. These target curves reflect the relationship between the preset speed, measured power, and measured membrane pressure at a specific temperature. Subsequently, interpolation was used to process the target curves at 24°C and 9°C, and the parameters for the target curve corresponding to 15°C were calculated to ensure good continuity and smoothness of the target curve within the temperature range.

[0052] Similarly, under operating conditions with a first inlet water temperature of 9°C, a second inlet water temperature of 15°C, and a third inlet water temperature of 24°C, corresponding target curves were first generated based on experimental data at constant temperatures of 9°C and 24°C, respectively. These target curves reflect the relationship between the preset speed, measured power, and measured membrane pressure at a specific temperature. Subsequently, interpolation was used to process the target curves at 9°C and 24°C, and the parameters for the target curve corresponding to 15°C were calculated to ensure good continuity and smoothness of the target curve over the temperature range.

[0053] The method for determining membrane front pressure in a water purifier provided by this invention interpolates the target curves corresponding to the first and third inlet water temperatures to generate a target curve corresponding to the second inlet water temperature. This method accurately predicts membrane front pressure, significantly improving temperature adaptability and measurement flexibility. Compared with traditional methods that rely on fixed temperature measurements, this method avoids the need for expensive individual measurements for each temperature, further enhancing adaptability to ambient temperature fluctuations.

[0054] In one embodiment, the interpolation process may include: The target curve corresponding to the first inlet water temperature and the target curve corresponding to the third inlet water temperature are interpolated using a linear interpolation method.

[0055] Specifically, the interpolation process may be a linear interpolation method, a polynomial interpolation method, a nearest neighbor interpolation method, etc. The following takes the interpolation process being a linear interpolation method as an example to illustrate the technical solution of the present invention.

[0056] In a specific application scenario of the method for determining the membrane front pressure of a water purifier provided by the present invention, the operating condition is that the second inlet water temperature is between the first inlet water temperature and the third inlet water temperature.

[0057] First, in a constant temperature environment with a third inlet water temperature, the booster pump's preset speed was set to multiple increments. The power and corresponding pre-membrane pressure were measured using a power meter and pressure sensor. The collected data were fitted using the binary least squares method to generate a target curve function corresponding to the third inlet water temperature.

[0058] Then, in a constant temperature environment of the first inlet water temperature, the same preset speed is set, the actual power value and the corresponding actual membrane front pressure value are measured, and the target curve function corresponding to the first inlet water temperature is also generated by fitting.

[0059] Next, the two target curve functions are interpolated using linear interpolation to calculate the target curve function corresponding to the second inlet water temperature. The interpolation calculation is implemented using the following formula: in, Indicates the first inlet water temperature, Indicates the second water inlet temperature, Indicates the third water inlet temperature, Indicates power, Indicates the membrane front pressure, Indicates the target curve function corresponding to the first inlet water temperature ， Represents the target curve function corresponding to the second inlet water temperature ， Represents the target curve function corresponding to the third inlet water temperature.

[0060] The method for determining the membrane front pressure of a water purifier provided by the present invention interpolates the target curve functions corresponding to the first water inlet temperature and the third water inlet temperature using the linear interpolation method to generate a target curve function corresponding to the second water inlet temperature. The interpolation method adopted performs curve fitting and calculation based on temperature changes, which can accurately predict the membrane front pressure and significantly improve temperature adaptability and measurement flexibility.

[0061] In one embodiment, fitting multiple sets of data to be fitted may include: The binary least squares method is used to fit multiple groups of data to be fitted.

[0062] It can be understood that multiple sets of data to be fitted are processed by fitting technology to generate a target curve.

[0063] In the following, based on the data characteristics and the need to accurately capture the relationship between the input variables and the target output, the binary least squares method was selected for the fitting process to construct a target curve based on the preset speed, the measured power value, and the measured pressure before the membrane at a certain temperature.

[0064] The method for determining the membrane front pressure of a water purifier provided by the present invention can accurately construct the target curve by fitting multiple groups of data to be fitted using the binary least squares method, thereby significantly improving the scientificity and reliability of the membrane front pressure prediction.

[0065] In one embodiment, the target curve may be: f(x,y)=ax+by+cx 2 +dxy+ey 2 +f in, f(x,y) Indicates membrane front pressure; x Indicates the boost pump speed; y Indicates the boost pump power; a 、 b 、 c 、 d 、 e 、 f is the fitting constant.

[0066] Specifically, a, b, c, d, e, and f are coefficients determined through mathematical fitting methods, corresponding to the coefficients of the linear term, quadratic term, and interaction term, respectively. In this model, the booster pump speed and power serve as independent variables, and the membrane front pressure serves as the dependent variable. The quadratic function parameters are optimized through fitting to achieve a mapping of the relationship between the independent and dependent variables.

[0067] As shown in Table 4, the experiment was conducted under controlled laboratory conditions at a constant temperature of 9°C. The temperature was maintained constant by adjusting the booster pump speed individually. A high-precision power meter monitored the booster pump input power in real time, and a pressure sensor simultaneously collected the corresponding membrane front pressure data to ensure that data acquisition was completed under stable conditions at each speed. The obtained experimental data was then substituted into the target curve function, and the relationship between membrane front pressure, booster pump speed, and power was fitted and analyzed to obtain the final fitting results.

[0068] Table 4 Fitting results of target curve coefficients at 9°C

[0069] As shown in Table 5, the experiment was conducted under laboratory-controlled conditions at a constant temperature of 24°C. The temperature was maintained constant by adjusting the booster pump speed individually. A high-precision power meter was used to monitor the booster pump input power in real time, and a pressure sensor was used to simultaneously collect corresponding membrane front pressure data. This ensured that data acquisition was completed under stable conditions at each speed. The obtained experimental data was then substituted into the target curve function, and the relationship between membrane front pressure, booster pump speed, and power was fitted and analyzed to obtain the final fitting results.

[0070] Table 5 Fitting results of target curve coefficients at 24°C

[0071] As shown in Table 6, the experiment was conducted under laboratory-controlled conditions at a constant temperature of 39°C. The temperature was maintained constant by adjusting the booster pump speed individually. A high-precision power meter monitored the booster pump input power in real time, and a pressure sensor simultaneously collected the corresponding membrane front pressure data to ensure that data acquisition was completed under stable conditions at each speed. The obtained experimental data was then substituted into the target curve function, and the relationship between membrane front pressure, booster pump speed, and power was fitted and analyzed to obtain the final fitting results.

[0072] Table 6 Fitting results of target curve coefficients at 39°C

[0073] Figure 3 This diagram shows the relationship between rotational speed and membrane front pressure, as modeled in the present invention. The horizontal axis represents booster pump speed, and the vertical axis represents membrane front pressure. This diagram intuitively and clearly illustrates the impact of speed changes on membrane front pressure. The diagram also displays both true values ​​(i.e., actual measured data) and estimated values ​​(i.e., predicted data calculated based on the fitted model). The close proximity between the two indicates the good predictive accuracy of the constructed model, thus validating the effectiveness of the membrane front pressure fitting method proposed in this invention in terms of modeling reliability and data consistency.

[0074] The method for determining the membrane front pressure of a water purifier provided by the present invention can accurately construct the target curve by fitting multiple groups of data to be fitted using the binary least squares method, thereby significantly improving the scientificity and reliability of the membrane front pressure prediction.

[0075] The following describes the water purifier membrane front pressure determination device provided by the present invention. The water purifier membrane front pressure determination device described below and the water purifier membrane front pressure determination method described above can refer to each other and can achieve the same technical effects, so they will not be repeated here.

[0076] Figure 4Schematic diagram of the structure of the device for determining the front pressure of the water purifier membrane provided by the present invention. Figure 4 As shown, the device may include: A temperature determination module 410 is used to determine the water inlet temperature of the water purifier; A curve determination module 420 is configured to determine a target curve corresponding to the inlet water temperature; a membrane front pressure determination module 430 for determining a current membrane front pressure based on the target curve and the current power and speed of the booster pump; The target curve is used to represent the corresponding relationship between the membrane front pressure and the power and speed of the booster pump.

[0077] In one embodiment, the curve determination module 420 is configured to: When the inlet water temperature is known, multiple sets of data to be fitted are obtained; Fitting the multiple sets of data to be fitted to obtain a target curve corresponding to the known inlet water temperature; Each set of data to be fitted includes a preset speed of the booster pump, a measured power value of the booster pump, and a measured value of the membrane front pressure corresponding to the preset speed and the measured power value.

[0078] In one embodiment, the apparatus further includes an interpolation module (not shown in the figure) configured to: interpolating the target curve corresponding to the first inlet water temperature and the target curve corresponding to the third inlet water temperature to obtain a target curve corresponding to the second inlet water temperature; Wherein, the first water inlet temperature is greater than the second water inlet temperature, and the second water inlet temperature is greater than the third water inlet temperature; or The first water inlet temperature is lower than the second water inlet temperature, and the second water inlet temperature is lower than the third water inlet temperature.

[0079] In one embodiment, the curve determination module 420 is configured to: The plurality of groups of data to be fitted are fitted using a binary least squares method.

[0080] In one embodiment, the apparatus further includes an interpolation module (not shown in the figure) configured to: The target curve corresponding to the first inlet water temperature and the target curve corresponding to the third inlet water temperature are interpolated using a linear interpolation method.

[0081] In one embodiment, the curve determination module 420 is configured to: f(x,y)=ax+by+cx 2 +dxy+ey 2 +f in, f(x,y) Indicates membrane front pressure; x Indicates the boost pump speed; y Indicates the boost pump power; a 、 b 、 c 、 d 、 e 、 f is the fitting constant.

[0082] Figure 5 An example of a physical structure diagram of an electronic device is shown below. Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communication interface 520, and the memory 530 communicate with each other via the communication bus 540. The processor 510 may call the logic instructions in the memory 530 to execute the method for determining the front pressure of the water purifier membrane described in any of the above embodiments, for example, including: Determine the water inlet temperature of the water purifier; determining a target curve corresponding to the inlet water temperature; determining a current membrane front pressure based on the target curve, the current power and speed of the booster pump; The target curve is used to represent the corresponding relationship between the membrane front pressure and the power and speed of the booster pump.

[0083] Furthermore, the logic instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0084] On the other hand, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for determining the membrane front pressure of a water purifier described in any of the above embodiments, for example, including: Determine the water inlet temperature of the water purifier; determining a target curve corresponding to the inlet water temperature; determining a current membrane front pressure based on the target curve, the current power and speed of the booster pump; The target curve is used to represent the corresponding relationship between the membrane front pressure and the power and speed of the booster pump.

[0085] In another aspect, the present invention further provides a computer program product, comprising a computer program, which may be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform the method for determining the front pressure of a water purifier membrane according to any of the above embodiments, for example, including: Determine the water inlet temperature of the water purifier; determining a target curve corresponding to the inlet water temperature; determining a current membrane front pressure based on the target curve, the current power and speed of the booster pump; The target curve is used to represent the corresponding relationship between the membrane front pressure and the power and speed of the booster pump.

[0086] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0087] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0088] Finally, it should be noted that the above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. A method for determining the membrane front pressure of a water purifier, characterized in that: include: Determine the water inlet temperature of the water purifier; determining a target curve corresponding to the inlet water temperature; determining a current membrane front pressure based on the target curve, the current power and speed of the booster pump; The target curve is used to represent the corresponding relationship between the membrane front pressure and the power and speed of the booster pump.

2. The method for determining the membrane front pressure of a water purifier according to claim 1, characterized in that: The target curve is determined as follows: When the inlet water temperature is known, multiple sets of data to be fitted are obtained; Fitting the multiple sets of data to be fitted to obtain a target curve corresponding to the known inlet water temperature; Each set of data to be fitted includes a preset speed of the booster pump, a measured power value of the booster pump, and a measured value of the membrane front pressure corresponding to the preset speed and the measured power value.

3. The method for determining the membrane front pressure of a water purifier according to claim 2, characterized in that: The method further comprises: interpolating the target curve corresponding to the first inlet water temperature and the target curve corresponding to the third inlet water temperature to obtain a target curve corresponding to the second inlet water temperature; Wherein, the first water inlet temperature is greater than the second water inlet temperature, and the second water inlet temperature is greater than the third water inlet temperature; or The first water inlet temperature is lower than the second water inlet temperature, and the second water inlet temperature is lower than the third water inlet temperature.

4. The method for determining the membrane front pressure of a water purifier according to claim 2, characterized in that: The fitting of the plurality of groups of data to be fitted comprises: The plurality of groups of data to be fitted are fitted using a binary least squares method.

5. The method for determining the membrane front pressure of a water purifier according to claim 3, characterized in that: The interpolation process includes: The target curve corresponding to the first inlet water temperature and the target curve corresponding to the third inlet water temperature are interpolated using a linear interpolation method.

6. The method for determining the membrane front pressure of a water purifier according to claim 4, characterized in that: The target curve is: f(x,y)=ax+by+cx 2 +dxy+ey 2 +f in, f(x,y) Indicates membrane front pressure; x Indicates the boost pump speed; y Indicates the boost pump power; a 、 b 、 c 、 d 、 e 、 f is the fitting constant.

7. A device for determining the membrane front pressure of a water purifier, characterized in that: include: A temperature determination module, used to determine the water inlet temperature of the water purifier; a curve determination module, configured to determine a target curve corresponding to the inlet water temperature; a membrane front pressure determination module, configured to determine a current membrane front pressure based on the target curve, the current power and speed of the booster pump; The target curve is used to represent the corresponding relationship between the membrane front pressure and the power and speed of the booster pump.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method for determining the membrane front pressure of a water purifier according to any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for determining the membrane front pressure of a water purifier according to any one of claims 1 to 6 is implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for determining the membrane front pressure of a water purifier according to any one of claims 1 to 6 is implemented.

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