A water purifier and a control method for controlling the water purifier.

Abstract

This invention provides a water purifier and a control method for controlling the water purifier. The water purifier includes a filter element assembly, a housing, a conductivity sensor, and a turbidity sensor. The filter element assembly is disposed within the housing, forming a filtration chamber between the filter element assembly and the housing. The housing has an inlet and an outlet, with the inlet communicating with the filtration chamber. The filter inlet of the filter element assembly is also communicating with the filtration chamber, and the filter outlet of the filter element assembly is communicating with the outlet. The conductivity sensor is disposed at the inlet, and the turbidity sensor is disposed on the housing or on the filter element assembly. The detection end of the turbidity sensor is used to detect the quality of the raw water in the filtration chamber. This invention, through dual monitoring by the conductivity and turbidity sensors, obtains an attenuation slope by fitting the conductivity and turbidity data. By comparing this slope with a filter element lifespan attenuation slope database, the lifespan of the filter element can be predicted more accurately.

Description

Technical Field

[0001] This invention belongs to the field of water purifier technology, specifically relating to a water purifier and a control method for controlling the water purifier. Background Technology

[0002] Currently, most areas rely on surface water as their primary water source, which is treated at water treatment plants before being distributed into residential water pipe networks. However, because surface water is easily polluted by river sand and other contaminants, it cannot be completely settled at water treatment plants. As a result, residents often find that the tap water appears yellow when using it in kitchens and bathrooms.

[0003] With people's pursuit of healthy living and increasing concern for water safety, household water purifiers have become essential appliances for many families. However, traditional reverse osmosis water purifiers often require a large space to be installed under the cabinet, and most usage scenarios do not require filtered pure water. In addition, most water purifiers have the problem of untimely or excessive filter replacement, which not only affects the water purification effect but may also lead to resource waste. To solve the above problems, mini water purifiers have emerged. Mini water purifiers are compact and convenient, but existing mini water purifiers do not allow users to intuitively understand the lifespan of the filter cartridges, making it difficult for users to accurately grasp the filter cartridge replacement time. The conventional method of judging the lifespan of filter cartridges only uses conductivity sensors to detect water hardness, but this method has the problem of providing only a single detection method and failing to reliably represent the actual usage environment. For example, in areas with low water hardness, filter cartridges often reach their lifespan quickly, but lifespan reminders are not timely or not given at all, leading to user complaints. After investigating multiple areas, it was found that although the water hardness was low, the turbidity of the water was high, such as colloids and other suspended substances in the water, which adhered to the surface of the filter cartridges, causing pollution and blockage. Summary of the Invention

[0004] This invention provides a water purifier and a control method for controlling the water purifier, which can solve the problem that existing micro water purifiers only judge the filter life by conductivity value, resulting in single detection data and inability to reliably represent the actual use environment, thus causing users to be unable to accurately grasp the replacement time of the filter.

[0005] This invention provides a water purifier, which includes a filter assembly, a housing, a conductivity sensor, and a turbidity sensor;

[0006] The filter element assembly is disposed in the housing, and a filter chamber is formed between the filter element assembly and the housing; the housing has an inlet and an outlet, the inlet is connected to the filter chamber, the filter inlet of the filter element assembly is connected to the filter chamber, and the filter outlet of the filter element assembly is connected to the outlet.

[0007] The conductivity sensor is located at the water inlet, and the turbidity sensor is located on the housing or on the filter element assembly. The detection end of the turbidity sensor is used to detect the raw water quality in the filtration chamber.

[0008] In some embodiments, a flow sensor is provided in the outlet, and the inlet end of the flow sensor is connected to the filter outlet of the filter element assembly.

[0009] In some embodiments, the outlet is further provided with a fixing component, the fixing component including a fixing member, and the flow sensor is embedded in the fixing member.

[0010] In some embodiments, the flow sensor is a split-type flow sensor, which includes an impeller and a sensing module. The impeller is rotatably disposed in the fixing member, and the inlet end of the impeller is connected to the filter outlet of the filter element assembly. The sensing module is disposed on the housing and is used to detect the rotation of the impeller.

[0011] In some embodiments, the filter outlet of the filter element assembly is disposed opposite to the water outlet. The fixing assembly further includes a guide ring and a plurality of guide ribs. The plurality of guide ribs are spaced apart circumferentially along the fixing member. One end of the guide rib is connected to the fixing member, and the other end of the guide rib is connected to the guide ring. One end face of the guide ring abuts against the inner wall of the water outlet, or the outer peripheral wall of the guide ring abuts against the inner wall of the water outlet, and the other end face of the guide ring abuts against the outer wall of the filter element assembly.

[0012] In some embodiments, the inlet includes a first flow channel and a second flow channel that are interconnected. The end of the first flow channel opposite to the second flow channel is connected to an assembly joint. The detection end of the conductivity sensor extends into the first flow channel. The end of the second flow channel opposite to the first flow channel is connected to the filter chamber. The cross-sectional area of ​​the second flow channel is smaller than that of the first flow channel.

[0013] In some embodiments, the water purifier further includes a controller, the conductivity sensor is electrically connected to the controller, the housing is vertically arranged, the controller is embedded in the top of the housing, the turbidity sensor is disposed in the top of the housing, the connection end of the turbidity sensor is electrically connected to the controller, and the detection end of the turbidity sensor extends into the filter chamber.

[0014] In some embodiments, the water purifier further includes a display screen disposed on the outer wall of the housing, and the display screen is electrically connected to the controller.

[0015] In some embodiments, the housing is provided with a sealing groove, and a sealing ring is provided in the sealing groove, and the turbidity sensor is sealed to the sealing groove through the sealing ring.

[0016] A control method for controlling the aforementioned water purifier, the control method comprising:

[0017] Establish a database of the life decay slope of the filter element assembly, and set the initial decay slope value of the water purifier;

[0018] The conductivity sensor detects the conductivity value of the raw water at the inlet, and the turbidity sensor detects the turbidity value of the raw water in the filtration chamber.

[0019] The detected raw water conductivity value and raw water turbidity value are fitted to obtain a first attenuation slope value. The first attenuation slope value is compared with the initial attenuation slope value, and the filter cartridge life value is output based on the comparison result.

[0020] In some embodiments, when a flow sensor is installed in the outlet, the control method further includes:

[0021] The flow sensor detects the outflow rate at the outlet, fits the detected raw water conductivity, raw water turbidity and outflow rate to obtain a second attenuation slope value, compares the second attenuation slope value with the initial attenuation slope value, and outputs the filter life value based on the comparison result.

[0022] The present invention provides a water purifier and a control method for controlling the water purifier, which have the following beneficial effects:

[0023] This invention employs dual monitoring with both conductivity and turbidity sensors to comprehensively assess water quality. The conductivity sensor detects the mineral content in the water, while the turbidity sensor detects the content of suspended solids and colloids. This dual monitoring more accurately reflects the true state of the raw water quality. By fitting the conductivity and turbidity data to obtain the attenuation slope, and comparing it with a filter lifespan attenuation slope database, the lifespan of the filter cartridge can be predicted more accurately. Because this method considers multiple aspects of water quality, it is more reliable than single conductivity detection. Accurately predicting filter lifespan avoids the waste of resources caused by premature filter replacement and ensures that the filter cartridge does not fail after prolonged use, thus guaranteeing water safety. The filter lifespan value is displayed on the water purifier, allowing users to intuitively understand the filter's usage status and replace it in a timely manner, improving the user experience. Furthermore, by considering both conductivity and turbidity parameters, the water purifier of this invention can adapt to the water quality characteristics of different regions, effectively filtering and monitoring both high-hardness water and low-hardness but high-turbidity water. Attached Figure Description

[0024] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a water purifier according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the housing and filter assembly according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the fixing component according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of a display screen according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the sealing groove according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the first and second flow channels according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the fastener according to an embodiment of the present invention.

[0032] Attached Figures: 1-Filter element assembly; 101-Inner shell; 102-Filter element; 2-Outer shell; 201-Filter chamber; 202-Inlet; 221-First flow channel; 222-Second flow channel; 203-Outlet; 204-Sealing groove; 3-Conductivity sensor; 4-Turbidity sensor; 5-Flow sensor; 501-Impeller; 601-Fixing component; 611-First sleeve; 612-Second sleeve; 602-Guide ring; 603-Guide rib; 7-Assembly joint; 8-Controller; 9-Display screen. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0035] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0037] See also Figure 1 As shown, according to an embodiment of the present invention, a water purifier is provided, which includes a filter element assembly 1, a housing 2, a conductivity sensor 3, and a turbidity sensor 4; the filter element assembly 1 is disposed in the housing 2, and a filtration chamber 201 is formed between the filter element assembly 1 and the housing 2; the housing 2 has an inlet 202 and an outlet 203, the inlet 202 is connected to the filtration chamber 201, the filtration inlet of the filter element assembly 1 is connected to the filtration chamber 201, and the filtration outlet of the filter element assembly 1 is connected to the outlet 203; the conductivity sensor 3 is disposed at the inlet 202, and the turbidity sensor 4 is disposed on the housing 2 or on the filter element assembly 1, and the detection end of the turbidity sensor 4 is used to detect the quality of the raw water in the filtration chamber 201.

[0038] Specifically, when water enters through inlet 202, conductivity sensor 3 detects the raw water flowing through inlet 202 and obtains the conductivity value of the raw water. The raw water flows from inlet 202 into filter chamber 201. The detection end of turbidity sensor 4 is located in filter chamber 201 and comes into contact with the raw water in filter chamber 201. Turbidity sensor 4 can detect the turbidity value of the raw water. The raw water flowing into filter chamber 201 flows into filter element assembly 1 for filtration. The filtered water then flows from the filter outlet of filter element assembly 1 into outlet 203. The data detected by conductivity sensor 3 and turbidity sensor 4 are fitted to obtain the attenuation slope. The water purifier is equipped with a filter element 102 lifespan attenuation slope database. The attenuation slope in the database corresponds to the lifespan of filter element 102. By comparing the attenuation slope obtained by detection and fitting with the attenuation slope in the database, the corresponding lifespan value of filter element 102 is obtained and displayed on the water purifier.

[0039] In this embodiment, the dual monitoring of conductivity sensor 3 and turbidity sensor 4 allows for a more comprehensive assessment of water quality. Conductivity sensor 3 detects the mineral content in the water, while turbidity sensor 4 detects the content of suspended solids and colloids. This dual monitoring more accurately reflects the true state of the raw water quality. By fitting the conductivity and turbidity data to obtain the attenuation slope, and comparing it with the filter cartridge 102 lifespan attenuation slope database, the lifespan of filter cartridge 102 can be predicted more accurately. Because this method considers multiple aspects of water quality, it is more reliable than single conductivity detection. Accurately predicting the lifespan of filter cartridge 102 avoids the waste of resources caused by premature replacement and ensures that filter cartridge 102 will not fail after prolonged use, thus guaranteeing water safety. The lifespan value of filter cartridge 102 is displayed on the water purifier, allowing users to intuitively understand the usage status of filter cartridge 102 and replace it in a timely manner, improving the user experience. Furthermore, by considering both conductivity and turbidity, the water purifier in this embodiment can adapt to the water quality characteristics of different regions. It can effectively filter and monitor both high-hardness water and low-hardness water with high turbidity. The mini water purifier with a visual filter cartridge 102 lifespan display is suitable for various homes and small offices, especially for users with high water quality requirements who also desire a compact and easy-to-operate device. Whether installed in the kitchen for daily drinking water purification or placed in the office for employee use, it can meet the water purification needs of different scenarios, providing users with healthy and safe drinking water.

[0040] It is worth noting that in this embodiment, the conductivity sensor 3 is used to detect the hardness of the raw water. Water hardness mainly refers to the concentration of calcium and magnesium ions in the water. Since these ions can conduct electricity, their presence affects the water's conductivity. The conductivity sensor 3 measures the conductivity of the water, and by analyzing the changes in conductivity, the water hardness can be calculated. The turbidity sensor 4 measures the turbidity of water by utilizing the scattering and absorption of light as it propagates in water. When a beam of light passes through a water sample, it is scattered and absorbed by suspended particles in the water sample, resulting in a decrease in light intensity. This decrease in light intensity is proportional to the concentration of suspended particles in the water sample. The lifespan decay slope of the filter element 102 reflects the rate at which the performance of the filter element 102 deteriorates. The larger the slope, the faster the performance of the filter element 102 deteriorates; the smaller the slope, the slower the performance deteriorates.

[0041] In one specific implementation, the filter element assembly 1 includes an inner shell 101 and a filter element 102 disposed in the inner shell 101. The inner shell 101 is provided with a filter inlet and a filter outlet. Raw water flows in from the filter inlet and flows out from the filter outlet after filtration. A filter chamber 201 is formed between the inner shell 101 and the outer shell 2. Multiple filter inlets are provided on the peripheral wall of the inner shell 101 to allow water to enter from multiple directions.

[0042] See also Figures 1 to 6 As shown, a flow sensor 5 is installed in the outlet 203, and the inlet end of the flow sensor 5 is connected to the filter outlet of the filter element assembly 1.

[0043] Specifically, the raw water flowing into the filter chamber 201 flows into the filter element assembly 1 for filtration. The filtered water then flows from the filter outlet of the filter element assembly 1 into the flow sensor 5, which measures the outflowing filtered water. The data detected by the conductivity sensor 3, turbidity sensor 4, and flow sensor 5 are fitted together. By comparing the attenuation slope obtained from the fitted data with the attenuation slope in the database, the corresponding filter element 102 lifespan value is obtained and displayed on the water purifier.

[0044] In this embodiment, the real-time water flow rate collected by the flow sensor 5 at the outlet 203 is further used to calibrate the service life attenuation slope of the filter element 102, thereby providing accurate data support for the use of the filter element 102. Combined with the data detected by the conductivity sensor 3 and the turbidity sensor 4, the filtration effect of the filter element 102 can be comprehensively evaluated. Through data fitting, the attenuation slope of the filter element 102 is calculated. This attenuation slope is compared with the standard attenuation slope in the database to predict the remaining lifespan of the filter element 102. The lifespan value of the filter element 102 is displayed in real time on the water purifier, providing users with intuitive reminders to replace the filter element 102, helping them to replace it in a timely manner and ensuring water safety and purification effectiveness.

[0045] See also Figures 1 to 3 As shown, a fixing component is also provided in the outlet 203. The fixing component includes a fixing member 601, and the flow sensor 5 is embedded in the fixing member 601.

[0046] In this embodiment, when water passes through the flow sensor, a fixing member 601 is provided in the outlet 203 to better fix the flow sensor 5. The fixing member 601 fixes the flow sensor 5 and provides a stable installation platform for the flow sensor 5, ensuring that the sensor will not be displaced due to vibration or water pressure changes during use, thereby ensuring the stability and accuracy of the measurement data. The fixing member 601 can also reduce the disturbance of water flow to the sensor and ensure the accuracy of the flow sensor 5 during measurement, especially under high-speed or turbulent conditions.

[0047] In one specific implementation, the filter element assembly 1 is vertically arranged in the outer shell 2. The bottom end of the outer shell 2 is provided with a water outlet 203. The top end of the inner shell 101 is located in the outer shell 2. The bottom end of the inner shell 101 is threadedly connected to the outer shell 2, and a sealing ring is provided at the connection.

[0048] See also Figure 1 and Figure 7 As shown, the flow sensor 5 is a split-type flow sensor. The flow sensor 5 includes an impeller 501 and a sensing module. The impeller 501 is rotatably mounted in the fixing member 601. The inlet end of the impeller 501 is connected to the filter outlet of the filter element assembly 1. The sensing module is mounted on the housing 2 and is used to detect the rotation of the impeller 501.

[0049] In this embodiment, when water flows to the impeller 501, the kinetic energy of the water drives the impeller 501 to rotate. The impeller 501 and the sensing module form a whole, where the sensing module is a Hall element module and the rotor is a magnetic rotor. The Hall element module detects the rotating magnetic field of different magnetic poles of the magnetic rotor, and generates high and low pulse levels by cutting magnetic lines of force, which are output to the controller. The controller then determines and calculates the flow rate. The relative position of the Hall element module and the impeller 501, that is, the Hall element module is set in the side wall of the housing 2, and the distance between the center of the cross-section of the impeller 501 and the center of the cross-section of the Hall element module is generally about 0-8mm. The specific size is determined by the selected split-type flow sensor, as long as the signal accuracy is ensured.

[0050] In one specific embodiment, the fixing member 601 includes a first sleeve 611 and a second sleeve 612, which are detachably connected. Each of the first sleeve 611 and the second sleeve 612 has a stop at an adjacent end, allowing the first sleeve 611 and the second sleeve to be inserted into each other for a detachable connection. A first bushing is mounted at the center of the first sleeve 611, and a second bushing is mounted at the center of the second sleeve 612. As the magnetic rotor of the impeller 501, a rotating shaft is provided, with both ends of the shaft inserted into the first bushing and the second bushing, respectively. With the first sleeve 611 and the second sleeve 612 inserted into each other, the impeller 501 is rotatably connected within the rotor housing, completing the assembly of the impeller 501.

[0051] See also Figures 1 to 3 As shown, the filter outlet of the filter element assembly 1 is arranged opposite to the water outlet 203. The fixing assembly also includes a guide ring 602 and multiple guide ribs 603. The multiple guide ribs 603 are arranged at intervals along the circumference of the fixing member 601. One end of the guide rib 603 is connected to the fixing member 601, and the other end of the guide rib 603 is connected to the guide ring 602. One end face of the guide ring 602 abuts against the inner wall of the water outlet 203 or the outer peripheral wall of the guide ring 602 abuts against the inner wall of the water outlet 203. The other end face of the guide ring 602 abuts against the outer wall of the filter element assembly 1.

[0052] Specifically, the impeller 501 is installed in the fixing part 601. After the inner shell 101 is threadedly connected to the outer shell 2, the inner shell 101 presses the guide ring 602, and the inner shell 101 further presses and fixes the sensor. The water outlet 203 of the filter element 102 directly flushes the sensor to ensure smooth flow and avoid turbulence in the cavity from interfering with the detection.

[0053] In this embodiment, guide ribs 603 are spaced apart circumferentially along the fixing member 601, with one end connected to the fixing member 601 and the other end connected to the guide ring 602. This structure provides additional support and stability, ensuring the stability and reliability of the filter element assembly 1 during installation and use. Furthermore, the arrangement of the guide ring 602 and guide ribs 603 helps ensure the coaxiality between the filter element assembly 1 and the outlet 203, that is, ensuring that their center lines are on the same straight line. This avoids assembly difficulties or leakage problems caused by coaxiality deviation.

[0054] In one specific implementation, the guide rib 603 is inclined upward, and the diameter of the guide ring 602 is larger than the diameter of the fixing member 601, forming a structure that is larger at the top and smaller at the bottom, which makes it easier for the inner shell 101 to press the flow sensor 5 into the outlet 203.

[0055] See also Figures 1 to 6As shown, the inlet 202 includes a first flow channel 221 and a second flow channel 222 that are interconnected. The end of the first flow channel 221 away from the second flow channel 222 is connected to the assembly joint 7. The detection end of the conductivity sensor 3 extends into the first flow channel 221. The end of the second flow channel 222 away from the first flow channel 221 is connected to the filter chamber 201, and the cross-sectional area of ​​the second flow channel 222 is smaller than the cross-sectional area of ​​the first flow channel 221.

[0056] Specifically, the assembly connector 7 is opened, and water from the faucet flows into the inlet 202. The water first flows into the first flow channel 221, where the conductivity sensor 3 detects the conductivity of the raw water. The raw water then flows into the second flow channel 222 and then into the filter chamber 201.

[0057] In this embodiment, by setting up a first flow channel 221 and a second flow channel 222, a channel for inserting a conductivity sensor 3 is opened on the wall of the inlet 202. The channel requires the probe of the conductivity sensor 3 to be completely submerged in water. Simultaneously, it avoids excessively high flow rates that could lead to insensitive measurement data. The sensor needs to be in contact with water for a certain period to provide data feedback; excessively high flow rates can cause untimely data transmission and inaccurate results. Therefore, the cross-sectional area of ​​the second flow channel 222 is smaller than the cross-sectional area of ​​the first flow channel 221, ideally less than half or more of the cross-section of the first flow channel 221. This ensures that water stagnates in the first flow channel 221, guaranteeing that the conductivity sensor 3 can fully detect and transmit data. Furthermore, due to the smaller cross-sectional area of ​​the second flow channel 222, the water flow velocity in this channel is faster, facilitating water flow into the filter chamber 201.

[0058] In one specific implementation, the water inlet 202 is located on the bottom side wall of the housing 2. However, after the water flows in from the water inlet 202, the raw water is injected from the top of the housing 2 through the flow channel. This ensures that there is enough water in the filter chamber 201 for filtration.

[0059] See also Figures 1 to 6 As shown, the water purifier also includes a controller 8, a conductivity sensor 3 is electrically connected to the controller 8, the housing 2 is vertically arranged, the controller 8 is embedded in the top of the housing 2, the turbidity sensor 4 is arranged in the top of the housing 2, the connection end of the turbidity sensor 4 is electrically connected to the controller 8, and the detection end of the turbidity sensor 4 extends into the filter chamber 201.

[0060] In this embodiment, the controller 8 is embedded in the top of the housing 2 and electrically connected to the turbidity sensor 4. This integrated design allows the controller 8 to easily receive data from the turbidity sensor 4, enabling real-time monitoring and intelligent control of the water purifier's operating status. Through the electrical connection between the conductivity sensor 3 and the controller 8, combined with the data from the turbidity sensor 4, the controller 8 can comprehensively analyze the water quality and achieve intelligent management. Placing the controller 8 and the turbidity sensor 4 on the top of the housing 2 shortens the distance between the two components. This allows the connection end of the turbidity sensor 4 to directly connect to the pins of the controller 8, avoiding the use of long wires. This simplifies the internal wiring of the water purifier, reduces wiring complexity, and makes the internal structure of the device neater. Shortening the connection cable reduces interference during signal transmission, improves signal stability and reliability, and reduces the signal transmission distance, thus improving the controller 8's response speed to the turbidity sensor 4 signal and enabling more timely collection and processing of water quality data.

[0061] As a specific implementation method, when a flow sensor is installed at the water outlet, the sensing module is electrically connected to the controller, and the flow sensor is used to detect the water flow rate.

[0062] See also Figures 1 to 6 As shown, the water purifier also includes a display screen 9, which is mounted on the outer wall of the housing 2 and is electrically connected to the controller 8.

[0063] In this embodiment, the data detected by the conductivity sensor 3, turbidity sensor 4, and flow sensor 5 are fitted. By comparing the attenuation slope obtained from the fitted data with the attenuation slope in the database, the corresponding filter cartridge 102 lifespan value is obtained and displayed on the display screen 9. The display screen 9 can intuitively show the user the current working status and related information of the water purifier, allowing the user to understand the lifespan of the filter cartridge 102 in real time. In addition, the display screen 9 can integrate various information, such as time, temperature, filter cartridge 102 usage time, and replacement time.

[0064] As a specific implementation, a display panel mounting area is provided on the top of the outer casing 2 to provide the micro water purifier with information on its usage status and the lifespan after fitting. In order to fix the display panel on the micro water purifier, the turbidity sensor 4 is integrated into the mounting area with a sealing fit. The display panel is fixed by the sealing fit between the turbidity sensor 4 and the outer casing 2, and at the same time, the turbidity sensor 4 and the display panel are integrated into a module.

[0065] See also Figures 1 to 5 As shown, the outer casing 2 is provided with a sealing groove 204, and a sealing ring is provided in the sealing groove 204. The turbidity sensor 4 is sealed to the sealing groove 204 through the sealing ring.

[0066] In this embodiment, the main function of the sealing ring is to ensure that the connection between the turbidity sensor 4 and the housing 2 is waterproof, to prevent water from leaking into the sensor or the interior of the water purifier, and to protect the internal circuits and components from water erosion and damage. The sealing groove 204 and the sealing ring enhance the stability of the water purifier structure, reduce structural displacement caused by vibration or pressure changes, and ensure the accuracy and stability of the sensor measurement.

[0067] A control method for controlling the aforementioned water purifier, the control method comprising:

[0068] Establish a database of the life decay slope of filter element assembly 1, and set the initial decay slope value of the water purifier;

[0069] The conductivity sensor 3 detects the conductivity value of the raw water at the inlet 202, and the turbidity sensor 4 detects the turbidity value of the raw water in the filter chamber 201.

[0070] The detected raw water conductivity and turbidity values ​​are fitted to obtain the first attenuation slope value. The first attenuation slope value is compared with the initial attenuation slope value, and the filter cartridge 102 lifespan value is output based on the comparison result.

[0071] It is worth noting that the filter element 102 lifespan decay slope refers to the rate at which the filtration efficiency or performance of the filter element 102 gradually decreases over time and with increased usage during the filtration process. This embodiment considers that the raw water quality also affects the lifespan; therefore, the first decay slope, fitted with the raw water conductivity and turbidity values, is compared with the decay slope in the database. The lifespan decay slope database in this embodiment refers to the database that has already collected different conductivity and turbidity values, and based on these values, the corresponding filter element 102 lifespan value has been calculated. The decay slope database includes various combinations of values; therefore, by comparing the detected first decay slope with the values ​​in the database, the corresponding filter element 102 lifespan value can be determined.

[0072] Specifically, when water flows through inlet 202, the conductivity sensor 3 collects data as XS / m (X represents the collected data value, and S / m is the unit of conductivity). The conductivity of tap water for domestic drinking water should not exceed 2500 μS / cm (micro-Siemens / cm). The turbidity sensor 4 collects data as Y NTU (Y represents the collected data value, and NTU is the unit of turbidity). For example, the normal requirement for turbidity in domestic drinking water is 1 NTU, and it should not exceed 3 NTU in areas with extremely poor water quality. In this embodiment, turbidity has been classified in the controller 8, such as: turbidity Y > 3 NTU is poor water quality, turbidity Y between 1 and 3 NTU is relatively poor water quality, turbidity Y between 0.3 and 1 NTU is relatively good water quality, and turbidity Y between 0.1 and 0.3 NTU is good water quality.

[0073] For example, when collecting raw water samples from a region, if the conductivity data collected earlier indicates that the water conductivity of the region is above the median value, such as conductivity X > 500 μS / cm, then it is defined as a region with relatively hard water. Then, combined with the data from turbidity sensor 4, such as the sampled turbidity Y being between 1 and 3 NTU, the fitting results indicate that the filter element 102 is used in a harsh environment, that is, the overall water quality of the raw water is poor. The lifespan of the filter element 102 will be adjusted according to the results of the fitting curve in the database.

[0074] Specifically, after comparing the first attenuation slope with the value in the database, the output process after adjusting the lifespan of filter element 102 is as follows: At the factory, the attenuation slope of filter element 102 written in controller 8 is 1, which means the initial attenuation slope value of the water purifier is 1. Controller 8 also records attenuation slopes under different water qualities, forming a lifespan attenuation slope database. When the user uses it for the first time, the conductivity and turbidity of the raw water flowing in from the inlet 202 are very high. If the attenuation slope written in controller 8 is 0.8, then the lifespan of filter element 102 will be displayed as a percentage product based on an attenuation rate of 0.8 during use, meaning the lifespan of filter element 102 is 85%.

[0075] When a flow sensor 5 is installed in the outlet 203, the control method further includes: the flow sensor 5 detects the outflow rate at the outlet 203, fits the detected raw water conductivity value, raw water turbidity value and outflow rate value to obtain a second attenuation slope value, compares the second attenuation slope value with the initial attenuation slope value, and outputs the filter element 102 lifespan value based on the comparison result.

[0076] In this embodiment, the flow sensor 5 also synchronously collects the outflow water flow rate and feeds the flow data back to the controller 8 for further calibration of the filter cartridge 102's lifespan degradation. By detecting the outflow water flow rate at the outlet 203 through the flow sensor 5, and combining it with the raw water conductivity and turbidity values, a more comprehensive monitoring of water quality and the water purifier's operating status can be achieved. This multi-parameter data fitting can provide a more accurate analysis of the filter cartridge 102's performance.

[0077] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0078] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A water purifier, characterized in that, include: Filter assembly (1), housing (2), conductivity sensor (3) and turbidity sensor (4); The filter element assembly (1) is disposed in the housing (2), and a filter chamber (201) is formed between the filter element assembly (1) and the housing (2); the housing (2) has an inlet (202) and an outlet (203), the inlet (202) is disposed on the bottom side wall of the housing (2), the inlet (202) is connected to the filter chamber (201), the filter inlet of the filter element assembly (1) is connected to the filter chamber (201), and the filter outlet of the filter element assembly (1) is connected to the outlet (203); The outer shell (2) is vertically arranged, the conductivity sensor (3) is located at the inlet (202), and the turbidity sensor (4) is located at the top of the outer shell (2). The raw water flows through the inlet (202) and the filter chamber (201) in sequence, and flows into the outlet (203) after being filtered by the filter element assembly (1). During this process, the conductivity sensor (3) detects the conductivity value of the raw water at the inlet (202), and the detection end of the turbidity sensor (4) is used to detect the raw water quality in the filter chamber (201). The inlet (202) includes a first flow channel (221) and a second flow channel (222) that are interconnected. The end of the first flow channel (221) away from the second flow channel (222) is connected to the assembly joint (7). The detection end of the conductivity sensor (3) extends into the first flow channel (221). The end of the second flow channel (222) away from the first flow channel (221) is connected to the filter chamber (201). The cross-sectional area of ​​the second flow channel (222) is smaller than the cross-sectional area of ​​the first flow channel (221).

2. The water purifier according to claim 1, characterized in that, A flow sensor (5) is provided in the outlet (203), and the inlet end of the flow sensor (5) is connected to the filter outlet of the filter element assembly (1).

3. The water purifier according to claim 2, characterized in that, The outlet (203) is also provided with a fixing component, which includes a fixing member (601), and the flow sensor (5) is disposed in the fixing member (601).

4. The water purifier according to claim 3, characterized in that, The flow sensor (5) is a split-type flow sensor. The flow sensor (5) includes an impeller (501) and a sensing module. The impeller (501) is rotatably disposed in the fixing member (601). The inlet end of the impeller (501) is connected to the filter outlet of the filter element assembly (1). The sensing module is disposed on the housing (2) and is used to detect the rotation of the impeller (501).

5. The water purifier according to claim 3, characterized in that, The filter outlet of the filter element assembly (1) is arranged opposite to the water outlet (203). The fixing assembly also includes a guide ring (602) and a plurality of guide ribs (603). The plurality of guide ribs (603) are arranged circumferentially at intervals along the fixing member (601). One end of the guide rib (603) is connected to the fixing member (601), and the other end of the guide rib (603) is connected to the guide ring (602). One end face of the guide ring (602) abuts against the inner wall of the water outlet (203) or the outer peripheral wall of the guide ring (602) abuts against the inner wall of the water outlet (203). The other end face of the guide ring (602) abuts against the outer wall of the filter element assembly (1).

6. The water purifier according to any one of claims 1 to 5, characterized in that, The water purifier also includes a controller (8), the conductivity sensor (3) is electrically connected to the controller (8), the controller (8) is embedded in the top of the outer shell (2), the connection end of the turbidity sensor (4) is electrically connected to the controller (8), and the detection end of the turbidity sensor (4) extends into the filter chamber (201).

7. The water purifier according to claim 6, characterized in that, The water purifier also includes a display screen (9), which is disposed on the outer wall of the housing (2) and is electrically connected to the controller (8).

8. The water purifier according to claim 1, characterized in that, The outer casing (2) is provided with a sealing groove (204), and a sealing ring is provided in the sealing groove (204). The turbidity sensor (4) is sealed to the sealing groove (204) through the sealing ring.

9. A control method, characterized in that, The control method for controlling the water purifier according to any one of claims 1 to 8 includes: Establish a database of the life decay slope of the filter element assembly (1) and set the initial decay slope value of the water purifier; The conductivity sensor (3) detects the conductivity value of the raw water at the inlet (202), and the turbidity sensor (4) detects the turbidity value of the raw water in the filter chamber (201); The detected raw water conductivity value and raw water turbidity value are fitted to obtain a first attenuation slope value. The first attenuation slope value is compared with the initial attenuation slope value, and the filter cartridge life value is output based on the comparison result.

10. The control method according to claim 9, characterized in that, When a flow sensor (5) is installed in the outlet (203), the control method further includes: The flow sensor (5) detects the outflow rate at the outlet (203), fits the detected raw water conductivity value, raw water turbidity value and outflow rate value to obtain a second attenuation slope value, compares the second attenuation slope value with the initial attenuation slope value, and outputs the filter life value based on the comparison result.

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