Water purifier and control method for controlling water purifier

Abstract

The invention provides a water purifier and a control method for controlling the water purifier. The water purifier comprises a filter element assembly, a shell, a conductivity sensor and a turbidity sensor, the filter element assembly is arranged in the shell, and a filter cavity is formed between the filter element assembly and the shell; the shell is provided with a water inlet and a water outlet, the water inlet is communicated with the filter chamber, a filter inlet of the filter element assembly is communicated with the filter chamber, and a filter outlet of the filter element assembly is communicated with the water outlet; the conductivity sensor is arranged at the water inlet, the turbidity sensor is arranged on the shell or the filter element assembly, and the detection end of the turbidity sensor is used for detecting the quality of raw water in the filter cavity. Through dual monitoring of the conductivity sensor and the turbidity sensor, the attenuation slope is obtained by fitting conductivity and turbidity data, and the attenuation slope is compared with a filter element service life attenuation slope database, so that the service life of the filter element can be predicted more accurately.

Description

Technical Field

[0001] The present invention belongs to the technical field of water purifiers, and in particular relates to a water purifier and a control method for controlling the water purifier. Background Art

[0002] At present, the main water source in most areas is surface water, which is treated by the water plant and then put into the residential water pipe network. However, since surface water is easily polluted by river sand and other pollutants, it cannot be completely settled in the water plant. When residents use the tap water in the kitchen and bathroom, they often find that the tap water has yellow water and other phenomena.

[0003] With people's pursuit of healthy life and increasing attention to 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 replacement of filter cartridges, which not only affects the water purification effect, but also may cause waste of resources. In order to solve the above problems, micro water purifiers came into being. Micro water purifiers are small and convenient in structure, but users of existing micro water purifiers cannot intuitively understand the life of the filter cartridge, resulting in users being unable to accurately grasp the replacement time of the filter cartridge. The conventional filter cartridge life judgment method is only to use a conductivity sensor to detect the hardness of the water quality, but there is a problem that the detection data is single and cannot reliably represent the actual use environment. For example, it is often the case that the life of the filter cartridge in low-hardness water quality areas expires quickly, but the life reminder is not timely or not reminded, resulting in user complaints. After actually investigating multiple areas, it was found that the water quality hardness is low, but the turbidity in the water is high. For example, suspended melts such as colloids in the water adhere to the surface of the filter cartridge and cause pollution and blockage. Summary of the invention

[0004] The present invention provides a water purifier and a control method for controlling the water purifier, which can solve the problem that the existing micro water purifier only judges the life of the filter element by the conductivity value, has a single detection data and cannot reliably represent the actual use environment, resulting in the technical problem that the user cannot accurately grasp the replacement time of the filter element.

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

[0006] The filter element assembly is arranged in the housing, and a filter chamber is formed between the filter element assembly and the housing; the housing has a water inlet and a water outlet, the water inlet is communicated with the filter chamber, the filter inlet of the filter element assembly is communicated with the filter chamber, and the filter outlet of the filter element assembly is communicated with the water outlet;

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

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

[0009] In some embodiments, a fixing assembly is further provided in the water outlet, the fixing assembly includes a fixing piece, and the flow sensor is embedded in the fixing piece.

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

[0011] In some embodiments, the filter outlet of the filter element assembly is arranged opposite to the water outlet, and the fixing assembly further includes a guide ring and a plurality of guide ribs, wherein the plurality of guide ribs are arranged at intervals along the circumference of the fixed member, one end of the guide rib is connected to the fixed 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 water inlet includes a first flow channel and a second flow channel that are interconnected, an end of the first flow channel facing away from the second flow channel is connected to an assembly joint, the detection end of the conductivity sensor extends into the first flow channel, an end of the second flow channel facing away from the first flow channel is connected to the filter chamber, and a cross-sectional area of ​​the second flow channel is smaller than a cross-sectional area of ​​the first flow channel.

[0013] In some embodiments, the water purifier also includes a controller, the conductivity sensor is electrically connected to the controller, the shell is vertically arranged, the controller is embedded in the top of the shell, the turbidity sensor is arranged on the top of the shell, 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, which is disposed on an outer wall of the housing and is electrically connected to the controller.

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

[0016] A control method for controlling the above-mentioned water purifier, the control method comprising:

[0017] Establishing a life attenuation slope database of the filter element assembly and setting an initial attenuation slope value of the water purifier;

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

[0019] The detected raw water conductivity value and the 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 element life value is output according to the comparison result.

[0020] In some embodiments, when a flow sensor is provided in the water outlet, the control method further comprises:

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

[0022] A water purifier and a control method for controlling the water purifier provided by the present invention have the following beneficial effects:

[0023] The present invention can more comprehensively evaluate water quality through dual monitoring of conductivity sensor and turbidity sensor. The conductivity sensor can detect the mineral content in water, while the turbidity sensor can detect the content of particulate matter such as suspended matter and colloid in water. This dual monitoring can more accurately reflect the real condition of raw water quality, and by fitting the data of conductivity and turbidity to obtain the attenuation slope, and comparing it with the filter element life attenuation slope database, the service life of the filter element can be more accurately predicted. Since multiple aspects of water quality are considered, this method is more reliable than single conductivity detection. By accurately predicting the life of the filter element, the waste of resources caused by premature replacement of the filter element can be avoided, and at the same time, it can also ensure that the filter element will not fail after being used for too long, thereby ensuring the safety of water quality. The filter element life value is displayed on the water purifier, so that the user can intuitively understand the use of the filter element and replace the filter element in time, thereby improving the user experience. Moreover, since the two parameters of conductivity and turbidity are considered, the water purifier of the present invention can adapt to the water quality characteristics of different regions, whether it is high hardness water or low hardness but high turbidity water, it can be effectively filtered and monitored. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

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

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

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

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

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

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

[0031] Figure 7 Schematic diagram of the structure of a fixing member according to an embodiment of the present invention.

[0032] Figures: 1-filter element assembly; 101-inner shell; 102-filter element; 2-outer shell; 201-filter chamber; 202-water inlet; 221-first flow channel; 222-second flow channel; 203-water outlet; 204-sealing groove; 3-conductivity sensor; 4-turbidity sensor; 5-flow sensor; 501-impeller; 601-fixing part; 611-first sleeve; 612-second sleeve; 602-guide ring; 603-guide rib; 7-assembly joint; 8-controller; 9-display screen. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present 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 arranged 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 a water inlet 202 and a water outlet 203, the water 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 water outlet 203; the conductivity sensor 3 is arranged at the water inlet 202, the turbidity sensor 4 is arranged 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 raw water in the filter chamber 201.

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

[0039] In this embodiment, the water quality can be evaluated more comprehensively through the dual monitoring of the conductivity sensor 3 and the turbidity sensor 4. The conductivity sensor 3 can detect the mineral content in the water, while the turbidity sensor 4 can detect the content of particulate matter such as suspended matter and colloids in the water. This dual monitoring can more accurately reflect the real condition of the raw water quality, and by fitting the conductivity and turbidity data to obtain the attenuation slope, and comparing it with the filter element 102 life attenuation slope database, the service life of the filter element 102 can be more accurately predicted. Since multiple aspects of water quality are taken into account, this method is more reliable than a single conductivity detection. By accurately predicting the life of the filter element 102, the waste of resources caused by premature replacement of the filter element 102 can be avoided, and at the same time, it can also ensure that the filter element 102 will not fail after being used for too long, thereby ensuring the safety of water quality. The life value of the filter element 102 is displayed on the water purifier, so that the user can intuitively understand the use of the filter element 102 and replace the filter element 102 in time, thereby improving the user experience. Moreover, since the two parameters of conductivity and turbidity are taken into consideration, the water purifier of this embodiment can adapt to the water quality characteristics of different regions, whether it is high-hardness water or low-hardness but high-turbidity water, it can be effectively filtered and monitored. The micro water purifier with a visual filter element 102 life display can be used in various homes and small offices, especially for those who have high requirements for water quality but want the equipment to be small and easy to operate. Whether it is installed in the kitchen for daily drinking water purification or placed in the office for employees to use, it can meet the water purification needs in different scenarios and provide 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. The hardness of water mainly refers to the concentration of calcium and magnesium ions in the water. Since these ions can conduct electricity, the presence of these ions will affect the conductivity of the water. The conductivity sensor 3 measures the conductivity in the water. By analyzing the change in conductivity, the hardness of the water can be calculated. The turbidity sensor 4 uses the scattering and absorption of light when it propagates in water to measure the turbidity of water quality. When a beam of light passes through a water sample, it will be scattered and absorbed by suspended particles in the water sample, resulting in the attenuation of light intensity. This attenuation of light intensity is proportional to the concentration of suspended particles in the water sample. The life attenuation slope of the filter element 102 can reflect the speed at which the performance of the filter element 102 decreases. The larger the slope, the faster the performance of the filter element 102 decays; the smaller the slope, the slower the performance decays.

[0041] As a specific embodiment, the filter element assembly 1 includes an inner shell 101 and a filter element 102 arranged 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 arranged on the peripheral wall of the inner shell 101, and water enters from multiple directions.

[0042] See also Figures 1 to 6 As shown, a flow sensor 5 is provided in the water outlet 203 , and an 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, and the filtered water flows into the flow sensor 5 from the filter outlet of the filter element assembly 1, and the flow sensor 5 measures the filtered water flowing out. The data detected by the conductivity sensor 3, the turbidity sensor 4 and the flow sensor 5 are fitted, and the attenuation slope obtained by the detection fitting is compared with the attenuation slope in the database to obtain the corresponding life value of the filter element 102 and display it on the water purifier.

[0044] In this embodiment, the service life attenuation slope of the filter element 102 is further calibrated according to the real-time water flow collected by the flow sensor 5 at the water outlet 203, so as to provide 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 filtering 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 life of the filter element 102. The life value of the filter element 102 is displayed in real time on the water purifier, providing the user with an intuitive reminder to replace the filter element 102, which helps the user to replace the filter element 102 in time to ensure the safety of water quality and purification effect.

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

[0046] In this embodiment, when water passes through the flow sensor, in order to better fix the flow sensor 5, a fixing member 601 is set in the water outlet 203. The fixing member 601 fixes the flow sensor 5. The fixing member 601 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 the water flow to the sensor, ensuring the accuracy of the flow sensor 5 during measurement, especially under high-speed or turbulent conditions.

[0047] As a specific embodiment, 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 flow sensor, which includes an impeller 501 and a sensing module. The impeller 501 is rotatably disposed in a fixing member 601, the inlet end of the impeller 501 is connected to the filter outlet of the filter element assembly 1, and the sensing module is disposed on the housing 2, and the sensing module 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, wherein the sensing module is a Hall element module, and the rotor is a magnetic rotor; thus, the Hall element module detects the rotating magnetic field of different magnetic poles of the magnetic rotor, and generates high and low pulse levels to output to the controller by cutting the magnetic lines of force, and then the controller 8 determines the size of the calculated flow. 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 cross-section center of the impeller 501 and the cross-section center of the Hall element module is generally about 0-8mm. The specific size is determined by the selected split flow sensor, and the signal accuracy can be ensured.

[0050] As a specific implementation, the fixing member 601 includes a first sleeve 611 and a second sleeve 612, and the first sleeve 611 and the second sleeve 612 are detachably connected. The first sleeve 611 and the second sleeve 612 are respectively provided with stoppers at adjacent ends, so that the first sleeve 611 and the second sleeve are plugged into each other through the stoppers to achieve a detachable connection. A first sleeve is provided at the center of the first sleeve 611, and a second sleeve is provided at the center of the second sleeve 612. As the magnetic rotor of the impeller 501, a rotating shaft is provided, and both ends of the rotating shaft are respectively inserted into the first sleeve and the second sleeve; as the first sleeve 611 and the second sleeve 612 are plugged into each other, the impeller 501 is rotated and connected in the rotor shell, and the assembly of the impeller 501 is completed.

[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, and the fixing assembly also includes a guide ring 602 and a plurality of guide ribs 603, and the plurality of guide ribs 603 are arranged at intervals along the circumference of the fixed member 601, one end of the guide rib 603 is connected to the fixed 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, and 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. When 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 hits the sensor to ensure smooth flow and avoid cavity turbulence interfering with detection.

[0053] In this embodiment, the guide ribs 603 are arranged at intervals along the circumference of the fixing member 601, one end of which is connected to the fixing member 601, and the other end is connected to the guide ring 602. This structure can provide additional support and stability, ensuring the stability and reliability of the filter element assembly 1 during installation and use. In addition, the arrangement of the guide ring 602 and the guide ribs 603 helps to ensure the coaxiality between the filter element assembly 1 and the water outlet 203, that is, to ensure that the center lines of the two are on the same straight line, so as to avoid assembly difficulties or water leakage problems caused by coaxiality deviation.

[0054] As a specific implementation, the guide rib 603 is tilted 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 water outlet 203.

[0055] See also Figures 1 to 6As shown, the water inlet 202 includes a first flow channel 221 and a second flow channel 222 which are interconnected, an 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, and an 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 joint 7 is opened, and the water in the faucet flows into the water inlet 202 , and the water first flows into the first flow channel 221 , and the conductivity sensor 3 detects the conductivity of the raw water, and the raw water then flows into the second flow channel 222 , and then flows into the filter chamber 201 .

[0057] In this embodiment, by setting the first flow channel 221 and the second flow channel 222, a channel for plugging the conductivity sensor 3 is opened on the wall of the water inlet 202. The channel requires the probe of the conductivity sensor 3 to be completely immersed in water. At the same time, it is necessary to avoid the flow rate being too fast, which leads to insensitive measurement data. The sensor needs to be in contact with water for a certain period of time for data feedback. Too fast a flow rate will cause untimely data transmission and inaccuracy. Therefore, the cross-sectional area of ​​the second flow channel 222 is smaller than the cross-sectional area of ​​the first flow channel 221. The optimal cross-sectional area of ​​the second flow channel 222 is less than half or more of the cross-sectional area of ​​the first flow channel 221 to ensure that water is retained in the first flow channel 221, and to ensure that the conductivity sensor 3 can fully detect and transmit data. Moreover, since the cross-sectional area of ​​the second flow channel 222 is small, the speed of water flow in this flow channel is faster, which helps water flow into the filter chamber 201.

[0058] As a specific implementation, the water inlet 202 is set on the bottom side wall of the shell 2, but after water flows in from the water inlet 202, a flow channel is set to allow raw water to be injected from the top of the shell 2, thereby ensuring that there is sufficient 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, the conductivity sensor 3 is electrically connected to the controller 8, the shell 2 is vertically arranged, the controller 8 is embedded in the top of the shell 2, the turbidity sensor 4 is arranged on the top of the shell 2, the connecting 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 is electrically connected to the turbidity sensor 4. Such an integrated design allows the controller 8 to conveniently receive data from the turbidity sensor 4, and realize real-time monitoring and intelligent control of the working state of the water purifier. Through the telecommunication connection between the conductivity sensor 3 and the controller 8, combined with the data of the turbidity sensor 4, the controller 8 can comprehensively analyze the water quality and realize intelligent management. The controller 8 and the turbidity sensor 4 are arranged on the top of the housing 2 to shorten the distance between the two components, so that the connection end of the turbidity sensor 4 is directly connected to the pin of the controller 8, avoiding the use of a long wire connection, which can simplify the internal wiring of the water purifier, simplify the wiring, reduce the wiring complexity, and make the interior of the device neater. Shortening the connection line can reduce interference during signal transmission, improve the stability and reliability of the signal, and reduce the signal transmission distance, which helps to improve the response speed of the controller 8 to the signal of the turbidity sensor 4, so that the collection and processing of water quality data is more timely.

[0061] As a specific implementation manner, when a flow sensor is provided 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 disposed on the outer wall of the housing 2 , and the display screen 9 is electrically connected to the controller 8 .

[0063] In this embodiment, the data detected by the conductivity sensor 3, the turbidity sensor 4 and the flow sensor 5 are fitted, and the attenuation slope obtained by the detection fitting is compared with the attenuation slope in the database to obtain the corresponding filter element 102 life value and display it on the display screen 9. The display screen 9 can intuitively show the current working status and related information of the water purifier to the user, so that the user can understand the life status of the filter element 102 of the water purifier in real time. In addition, the display screen 9 can integrate a variety of information, such as time, temperature, filter element 102 usage time, replacement time, etc.

[0064] As a specific implementation, a display panel installation area is provided on the top of the outer shell 2 to provide the micro water purifier with display of usage status and life information after fitting. In order to enable the display panel to be fixed on the micro water purifier, the sealing fit of the turbidity sensor 4 is integrated into the installation area. The display panel is fixed through the sealing fit of the turbidity sensor 4 and the outer shell 2, and the turbidity sensor 4 and the display panel form a module integration.

[0065] See also Figures 1 to 5 As shown, the housing 2 is provided with a sealing groove 204 , a sealing ring is provided in the sealing groove 204 , and the turbidity sensor 4 is sealedly connected to the sealing groove 204 via 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, prevent water from leaking into the sensor or the inside of the water purifier, and protect the internal circuits and components from moisture erosion and damage. The setting of the sealing groove 204 and the sealing ring enhances the stability of the water purifier structure, reduces structural displacement caused by vibration or pressure changes, and ensures the accuracy and stability of the sensor measurement.

[0067] A control method is used to control the above water purifier, the control method comprising:

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

[0069] The conductivity sensor 3 detects the conductivity value of the raw water at the water 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 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 life value of the filter element 102 is output according to the comparison result.

[0071] It is worth noting that the life attenuation slope of the filter element 102 refers to the rate at which the filtration efficiency or performance of the filter element 102 gradually decreases with the passage of time and the increase in the number of uses during the filtration process, and the trend of the performance of the filter element 102 changing over time. This embodiment takes into account that the quality of raw water also has an impact on the life, so the first attenuation slope after fitting the raw water conductivity value and the raw water turbidity value is compared with the attenuation slope in the database. The life attenuation slope database in this embodiment refers to the different conductivity values ​​and turbidity values ​​that have been collected in advance, and the corresponding filter element 102 life value is calculated by fitting according to the different conductivity values ​​and turbidity values. The attenuation slope database includes the mutual matching schemes between the various values, so after comparing the first attenuation slope obtained by detection with the values ​​in the database, the corresponding filter element 102 life value can be known.

[0072] Specifically, when water flows through the water inlet 202, the data collected by the conductivity sensor 3 is XS / m (X represents the collected data value, and S / m is the conductivity index unit), the conductivity of domestic drinking water tap water should be no more than 2500μS / cm (micro Siemens / cm), and the data collected by the turbidity sensor 4 is Y NTU (Y represents the collected data value, and NTU is the turbidity index unit). For example, the normal turbidity requirement for domestic drinking water is 1NTU, and the water quality in areas with extremely poor water quality must not exceed 3NTU. In this embodiment, the turbidity has been divided in the controller 8, such as: turbidity Y>3NTU is poor water quality, turbidity Y between 1~3NTU is poor water quality, turbidity Y between 0.3~1NTU is better water quality, and turbidity Y between 0.1~0.3NTU is good water quality.

[0073] For example, raw water from a region is collected. When the conductivity data collected in advance determines that the water conductivity in the region is above the median, for example, conductivity X>500μS / cm, it is defined as a region with hard water quality. Combined with the data from the turbidity sensor 4, for example, the sampled turbidity Y is between 1 and 3NTU, it is determined after fitting that the operating environment of the filter element 102 is harsh, that is, the quality of the raw water is not good overall, and the life of the filter element 102 will be adjusted according to the result of the database fitting curve.

[0074] Specifically, after the first attenuation slope is compared with the value in the database, the process of outputting the adjusted life of the filter element 102 is as follows: when leaving the factory, the life attenuation slope of the filter element 102 written in the controller 8 is 1, that is, the initial attenuation slope value of the water purifier is 1, and the attenuation slopes under different water qualities are also recorded in the controller 8 to form a life attenuation slope database. When the user uses it for the first time, the conductivity and turbidity of the raw water flowing in from the water inlet 202 are very high. If the attenuation slope written in the controller 8 is 0.8, the life of the filter element 102 will be displayed as a percentage product according to the attenuation rate of 0.8 during use, that is, the life of the filter element 102 is 85%.

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

[0076] In this embodiment, the flow sensor 5 will also synchronously collect the water flow rate, and feed the flow data back to the controller 8 for further calibration of the life attenuation of the filter element 102. The flow sensor 5 detects the water flow value at the water outlet 203, combined with the raw water conductivity value and raw water turbidity value, to more comprehensively monitor the water quality and the working state of the water purifier. This multi-parameter data fitting can provide a more accurate performance analysis of the filter element 102.

[0077] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0078] The above are only 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 shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A water purifier, characterized in that: include: Filter element assembly (1), housing (2), conductivity sensor (3) and turbidity sensor (4); The filter element assembly (1) is arranged 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 a water inlet (202) and a water outlet (203), the water inlet (202) is in communication with the filter chamber (201), the filter inlet of the filter element assembly (1) is in communication with the filter chamber (201), and the filter outlet of the filter element assembly (1) is in communication with the water outlet (203); The conductivity sensor (3) is arranged at the water inlet (202), the turbidity sensor (4) is arranged 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 raw water in the filter chamber (201).

2. The water purifier according to claim 1, characterized in that: A flow sensor (5) is provided in the water outlet (203), and an 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: A fixing component is also provided in the water outlet (203), the fixing component comprising a fixing member (601), and the flow sensor (5) is provided 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, comprising an impeller (501) and a sensing module, wherein the impeller (501) is rotatably arranged in the fixing member (601), the inlet end of the impeller (501) is connected to the filter outlet of the filter element assembly (1), and the sensing module is arranged 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), and the fixing assembly further comprises a guide ring (602) and a plurality of guide ribs (603), wherein the plurality of 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), and 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 claim 1, characterized in that: The water inlet (202) comprises a first flow channel (221) and a second flow channel (222) which are interconnected, an end of the first flow channel (221) which faces away from the second flow channel (222) is connected to an assembly joint (7), a detection end of the conductivity sensor (3) extends into the first flow channel (221), an end of the second flow channel (222) which faces away from the first flow channel (221) is connected to the filter chamber (201), and a cross-sectional area of ​​the second flow channel (222) is smaller than a cross-sectional area of ​​the first flow channel (221).

7. The water purifier according to any one of claims 1 to 6, characterized in that: The water purifier further comprises a controller (8), the 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 at 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).

8. The water purifier according to claim 7, characterized in that: The water purifier further comprises a display screen (9), wherein the display screen (9) is arranged on the outer wall of the housing (2), and the display screen (9) is electrically connected to the controller (8).

9. The water purifier according to claim 1, characterized in that: The housing (2) is provided with a sealing groove (204), a sealing ring is provided in the sealing groove (204), and the turbidity sensor (4) is sealedly connected to the sealing groove (204) via the sealing ring.

10. A control method, characterized in that: Used to control the water purifier according to any one of claims 1 to 9, the control method comprises: Establishing a life attenuation slope database of the filter element assembly (1) and setting an initial attenuation slope value of the water purifier; The conductivity sensor (3) detects the conductivity value of the raw water at the water 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 the 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 element life value is output according to the comparison result.

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

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