Dishwasher

Abstract

The utility model discloses a dish-washing machine which comprises a machine body, a dish-washing device, a dish-washing device, a dish-washing device, a dish-washing device, a dish-washing device and a dish-washing device. The water quality detector is arranged on the machine body and comprises a plurality of electrodes, the number of the electrodes is larger than or equal to three, any two electrodes in the electrodes form an electrode pair, any electrode pair can be used for detecting the conductivity of liquid in at least one position of the washing cavity and the liquid flow path, and the machine body is suitable for working according to the detection result of the water quality detector. According to the dish-washing machine provided by the embodiment of the utility model, the conductivity of the liquid in at least one of the washing cavity and the liquid flow path is detected through the water quality detector, so that the machine body can work according to the detection result of the water quality detector, the washing time and the rinsing times can be flexibly adjusted, intelligent control of the dish-washing machine can be realized, water is not easily wasted, and the service life of the dish-washing machine is prolonged. The washing effect on tableware is good, the detection precision of the water quality detector is high, and the detection function is reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen appliance dishwasher technical field, more specifically, relate to a dishwasher. BACKGROUND

[0002] The dishwasher is the machine that uses chemistry, machinery, heat and electric power etc. to dishware, dish, glassware, knife fork and steaming cooking utensil etc. dishware carries out washing, rinsing and drying. In the related art, the washing mode of the dishwasher is fixed, cannot adjust the washing mode flexibly according to the quantity and volume of the dishware to be washed, and water is easily wasted or the dishware is not easily washed clean. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a dishwasher, the washing mode of the dishwasher is adjustable, the washing mode can be adjusted flexibly according to the quantity and volume of the dishware to be washed, water is not easily wasted, and the washing effect on the dishware is better.

[0004] According to the dishwasher of the utility model embodiment, the water quality detector is arranged on the machine body and includes a plurality of electrodes, the number of the electrodes is greater than or equal to three, any two of the plurality of electrodes form an electrode pair, any electrode pair can be used to detect the conductivity of the liquid at least one of the washing cavity and the liquid flow path, and the machine body is adapted to work according to the detection result of the water quality detector.

[0005] According to the dishwasher of the utility model embodiment, the water quality detector is arranged on the machine body and includes a plurality of electrodes, the number of the electrodes is greater than or equal to three, any two of the plurality of electrodes form an electrode pair, any electrode pair can be used to detect the conductivity of the liquid at least one of the washing cavity and the liquid flow path, and the machine body is adapted to work according to the detection result of the water quality detector.

[0006] In addition, the dishwasher according to the above embodiments of the utility model can also have the following additional technical features:

[0007] According to some embodiments of the utility model, the water quality detector includes a detector main body, and a plurality of electrodes are arranged at one end of the detector main body, wherein the plurality of electrodes are distributed in the form of a regular polygon, or the plurality of electrodes are arranged along a straight line at intervals.

[0008] According to some embodiments of the utility model, in any two electrode pairs, the conductivity range of one electrode pair is larger, the distance between the two electrodes of the electrode pair is D1, the conductivity range of the other electrode pair is smaller, the distance between the two electrodes of the electrode pair is D2, and D1 >= D2.

[0009] According to some embodiments of the utility model, the electrodes are three, the three electrodes are arranged at one end of the detector main body and are arranged along a straight line.

[0010] According to some embodiments of the utility model, the electrodes are four, the four electrodes are arranged at one end of the detector main body and are distributed in a square shape.

[0011] According to some embodiments of the utility model, the distance between any two adjacent electrodes is 1mm-20mm.

[0012] According to some embodiments of the utility model, the electrodes are sheet electrodes, and the plurality of sheet electrodes are arranged along the thickness direction.

[0013] According to some embodiments of the utility model, the dishwasher further comprises a plurality of load resistors, and the plurality of load resistors are connected in series with the plurality of electrode pairs respectively; or the dishwasher further comprises at least one load resistor, and any load resistor is adapted to be connected in series with any electrode pair of the plurality of electrode pairs.

[0014] According to some embodiments of the utility model, the liquid flow path comprises a circulation flow path and a liquid inlet flow path, the liquid inlet flow path is communicated with the washing cavity and is used for supplying water into the washing cavity, and the washing cavity is communicated with two ends of the circulation flow path to enable liquid to flow circularly between the washing cavity and the circulation flow path; wherein at least one of the liquid inlet flow path, the washing cavity and the circulation flow path is provided with the water quality detector; or at least one of the washing cavity and the circulation flow path and the liquid inlet flow path is provided with the water quality detector.

[0015] According to some embodiments of the utility model, the liquid flow path comprises a circulation flow path, the washing cavity is communicated with two ends of the circulation flow path, the dishwasher further comprises a circulation pump, the circulation pump is arranged in the circulation flow path, the circulation pump is used for driving liquid to flow circularly between the washing cavity and the circulation flow path, and the circulation flow path is provided with the water quality detector.

[0016] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:

[0018] Figure 1 is a structural schematic view of a dishwasher according to the embodiments of the present utility model;

[0019] Figure 2 is a front view of a water quality detector according to the first embodiment of the present utility model, wherein the electrodes are cylindrical electrodes, the number of the electrodes is three and the electrodes are distributed in a regular triangle shape;

[0020] Figure 3 is Figure 2 a side view;

[0021] Figure 4 is Figure 2 a top view;

[0022] Figure 5 is a front view of a water quality detector according to the second embodiment of the present utility model, wherein the electrodes are cylindrical electrodes, the number of the electrodes is four and the electrodes are distributed in a regular quadrilateral shape;

[0023] Figure 6 is Figure 5 a side view;

[0024] Figure 7 is Figure 5 a top view;

[0025] Figure 8 is a front view of a water quality detector according to the third embodiment of the present utility model, wherein the electrodes are cylindrical electrodes, the number of the electrodes is three and the electrodes are arranged along a straight line at intervals;

[0026] Figure 9 is Figure 8 a side view;

[0027] Figure 10 is Figure 8 a top view;

[0028] Figure 11 is a front view of a water quality detector according to the fourth embodiment of the present utility model, wherein the electrodes are sheet-shaped electrodes;

[0029] Figure 12 is Figure 11 a side view;

[0030] Figure 13 is Figure 11 a top view;

[0031] Figure 14 is a flow chart of a control method according to the fifth embodiment of the present utility model;

[0032] Figure 15 is a flow chart of the control method according to the sixth embodiment of the present application;

[0033] Figure 16 is a flow chart of the control method according to the seventh embodiment of the present application;

[0034] Figure 17 is a flow chart of the control method according to the eighth embodiment of the present application.

[0035] Reference signs:

[0036] dishwasher 100; dishware 200;

[0037] machine body 10; washing cavity 11; liquid flow path 12; circulation flow path 121; liquid inlet flow path 122; liquid outlet flow path 123;

[0038] water quality detector 20; detector body 21; electrode 22; first electrode 221; second electrode 222; third electrode 223;

[0039] water inlet valve 41; breather 42; water softener 43; spray arm 44; dish rack 45; circulation pump 46; filter 47; inner tank 48. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0041] In the description of the present application, it should be understood that the terms "thickness", "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0042] In the description of the utility model, "first feature", "second feature" can include one or more features, "multiple" means two or more, the "above" or "below" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them, the "above", "upper" and "top" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.

[0043] The dishwasher 100 according to an embodiment of the utility model will be described below with reference to the accompanying drawings.

[0044] Referring to Figures 1-13 According to the dishwasher 100 of the embodiment of the utility model, the dishwasher 100 can include a body 10 and a water quality detector 20.

[0045] Specifically, the body 10 has a washing cavity 11 and a liquid flow path 12 communicating with the washing cavity 11. The washing cavity 11 is used to place tableware 200, and the liquid flow path 12 can be used to introduce liquid into the washing cavity 11 to wash the tableware 200, and the liquid flow path 12 can also be used to drain the liquid in the washing cavity 11, such as dirty water after washing. The liquid introduced into the washing cavity 11 and the liquid present in the washing cavity 11 can be tap water or municipal water, washing water mixed with tap water and detergent, liquid mixed with washing water and oil, etc., so as to wash the tableware 200 by washing water and rinse the tableware 200 by tap water. The detergent can be dishwashing powder, etc.

[0046] For example, in some embodiments, as Figure 1 As shown in the figure, the dishwasher 100 includes a body 10, an inner container 48 and a table rack 45, the inner container 48 is arranged in the body 10 and defines a washing cavity 11, and the table rack 45 is arranged in the washing cavity 11 for placing tableware 200. The liquid flow path 12 includes a liquid inlet flow path 122, a circulation flow path 121 and a liquid outlet flow path 123, the liquid inlet flow path 122 communicates a water source and the washing cavity 11 to introduce liquid into the washing cavity 11. Both ends of the circulation flow path 121 communicate with the washing cavity 11 to make the liquid circulate between the washing cavity 11 and the circulation flow path 121, which is beneficial to the circulation of the liquid in the washing cavity 11 to flush the tableware, the utilization rate of washing water is higher, the washing efficiency is higher, and water is saved. The liquid outlet flow path 123 communicates the washing cavity 11 and a drain to drain the dirty water in the washing cavity 11 after washing the tableware 200.

[0047] The water quality detector 20 is arranged in the machine body 10 and comprises a plurality of electrodes 22, the number of the electrodes 22 is greater than or equal to three, any two electrodes 22 of the plurality of electrodes 22 are formed into an electrode pair, any electrode pair can be used to detect the conductivity of the liquid at least one of the washing cavity 11 and the liquid flow path 12, and the machine body 10 can work according to the detection result of the water quality detector 20. The water quality detector 20 is used to detect the water quality such as the conductivity of the liquid, and the water quality detector 20 can be a sensor used to detect the conductivity of the liquid.

[0048] The conductivity is a physical quantity for measuring the electrical conductivity of a substance. In a liquid, the conductivity reflects the concentration of dissolved ions in the liquid, and the conductivity is directly related to the content of dissolved salts and other electrolytes in the liquid. Specifically, the conductivity can be determined by placing electrodes 22 in an aqueous solution and detecting the current passing through the electrode 22 pieces, the greater the conductivity, the more ions dissolved in the water, the stronger the conductivity. It can be understood that the purer the liquid, the lower the conductivity; the more turbid the liquid, the higher the conductivity. For example, the conductivity of tap water is generally 100 μs / cm-200 μs / cm (unit: microsiemens per centimeter), and the conductivity of washing water mixed with detergent is generally 9000 μs / cm-10000 μs / cm, and the conductivity of tap water is much lower than that of washing water.

[0049] It should be noted that in this application, for the same electrode 22, the electrode 22 can act as an anode or a cathode in the process of forming an electrode pair with other different electrodes 22 to detect the conductivity of the liquid, that is, the same electrode 22 can act as an anode in an electrode pair formed with one electrode 22 and as a cathode in an electrode pair formed with another electrode 22, so that in the process of detecting the conductivity of the liquid, one electrode pair has one electrode 22 acting as an anode and the other acting as a cathode.

[0050] The working process of the dishwasher 100 includes a washing process, a rinsing process and a drying process. In the washing process, the liquid is introduced into the washing cavity 11 so that the liquid in the washing cavity 11 is the liquid mixed with tap water and detergent to wash the tableware 200. In the rinsing process, tap water is introduced into the washing cavity 11 multiple times and discharged to rinse the tableware 200 multiple times until the tableware 200 is clean. In the drying process, the water on the surface of the tableware 200 is removed.

[0051] The water quality detector 20 is used to detect the conductivity of the liquid at least one of the washing cavity 11 and the liquid flow path 12, that is, the water quality detector 20 can be used to detect the conductivity of the liquid in the liquid flow path 12, or can be used to detect the conductivity of the liquid in the washing cavity 11.

[0052] For example, in some embodiments, as Figure 1As shown, the water quality detector 20 can be arranged in the inlet flow path 122 for detecting the conductivity of the tap water during the water inlet process, i.e. detecting the initial water quality when water is fed into the washing cavity 11, or arranged in the washing cavity 11 or the circulation flow path 121 for detecting the conductivity of the tap water during the water inlet process, the conductivity of the washing water during the washing process, and the conductivity of the rinsing water during the rinsing process.

[0053] The harder the water quality of the tap water, the longer the washing time, the rinsing time and the rinsing times required, and the water quality detector 20 can adjust the washing time, the rinsing time and the rinsing times according to the water quality of the tap water. For example, the water quality in the south is relatively soft, and the water quality in the north is relatively hard, and the user in the south can automatically select a shorter washing time, a shorter rinsing time and fewer rinsing times by the water quality detector 20, and the user in the north can automatically select a longer washing time, a longer rinsing time and more rinsing times by the water quality detector 20.

[0054] The water quality detector 20 can also facilitate the comparison of the conductivity of the washing water and the conductivity of the tap water, and the comparison of the conductivity of the rinsing water and the conductivity of the tap water, so as to judge whether the tableware 200 is clean or not. Of course, the conductivity as the standard can also be directly set in the water quality detector 20, and the conductivity of the tap water does not need to be detected, which is beneficial to simplify the detection steps of the water quality detector.

[0055] The water quality detector 20 can also facilitate the comparison of the conductivity of the washing water and the conductivity of the tap water, and the comparison of the conductivity of the rinsing water and the conductivity of the tap water, so as to judge whether the tableware 200 is clean or not. Of course, the conductivity as the standard can also be directly set in the water quality detector 20, and the conductivity of the tap water does not need to be detected, which is beneficial to simplify the detection steps of the water quality detector.

[0056] The water quality detector 20 can be one or more. For example, in some embodiments, as shown in FIG. 1, the water quality detector 20 can be arranged in the inlet flow path 122, the washing cavity 11 and the circulation flow path 121. Figure 1As shown, the water quality detector 20 is three, one water quality detector 20 is arranged in the liquid inlet flow path 122 to detect the conductivity of tap water, one water quality detector 20 is arranged in the washing cavity 11 to detect the conductivity of the liquid during the water inlet process, the washing process and the rinsing process, and another water quality detector 20 is arranged in the circulation flow path 121 to detect the conductivity of the liquid during the water inlet process, the washing process and the rinsing process.

[0057] In some embodiments, the water quality detector 20 is one and is arranged in the circulation flow path 121, both ends of the circulation flow path 121 are in communication with the washing cavity 11, the water quality detector 20 can be used to detect the water quality of the tap water, i.e. the initial water quality, during the process of introducing tap water into the washing cavity 11 without introducing detergent, and can be used to detect the water quality of the washing water and the rinsing water during the washing process and the rinsing process, and the number of water quality detectors 20 is small, which is more economical.

[0058] In some related technologies, the washing mode of the dishwasher is fixed, for example, the washing time, the rinsing time and the number of rinsing are fixed, and the washing time, the rinsing time and the number of rinsing cannot be flexibly adjusted according to the water quality of the liquid in the dishwasher, and intelligent control cannot be achieved.

[0059] In the present application, the water quality detector 20 can detect the conductivity of the liquid at least at one of the washing cavity 11 and the liquid flow path 12, monitor the conductivity of the liquid in the dishwasher 100, and enable the machine body 10 to flexibly adjust the washing mode, such as adjusting the washing time, the rinsing time and the number of rinsing, according to the detection result of the water quality detector 20.

[0060] In addition, during the operation of the dishwasher 100, there may be a large amount of alkaline components (such as detergent components), grease, protein, scale and other pollutants in the washing cavity 11, the pollutants are easy to contact with the electrode 22 or even condense on the surface of the electrode 22, causing the electrode 22 to be contaminated, and the pollutants are also easy to cause the electrode 22 to adhere to bubbles or cause the electrode 22 to be corroded, causing the electrode 22 to be damaged, and the problem of the electrode 22 being contaminated or damaged becomes a faulty electrode, which can reduce the detection accuracy of the water quality detector 20.

[0061] In the present application, the number of electrodes 22 in the water quality detector 20 is greater than or equal to three, and any two electrodes 22 form an electrode pair, so that the water quality detector 20 includes a plurality of electrode pairs. At least one of the plurality of electrode pairs can be selectively used, that is, even if there is a faulty electrode, the electrode that has not failed can still be used, which is helpful to reduce the use rate of the faulty electrode, improve the detection accuracy of the water quality detector 20, make the water quality detection function of the water quality detector 20 not easy to fail, and the detection function is more reliable.

[0062] According to the dishwasher 100, the conductivity of the liquid in at least one of the washing cavity 11 and the liquid flow path 12 is detected by the water quality detector 20, so that the machine body 10 can work according to the detection result of the water quality detector 20, so as to adjust the washing time and the rinsing time according to the real-time conductivity of the liquid in the dishwasher 100, so that the washing mode of the dishwasher 100 is adjustable, the intelligent control of the dishwasher 100 can be realized, water is not easily wasted, the washing effect of the tableware 200 is better, and the detection accuracy and detection function of the water quality detector 20 are higher and more reliable.

[0063] In some embodiments of the present application, as shown in Figure 1 The washing cavity 11 is provided with the water quality detector 20, so that the conductivity of the liquid can be detected during the water inlet process, the washing process and the rinsing process.

[0064] In the same dishwashing process, the water quality in each region of the dishwasher 100 can be different, such as the conductivity of the liquid in the liquid inlet flow path 122 and the washing cavity 11. In different dishwashing processes, the contaminants in the washing cavity 11 can be different, such as the oil stains and residues on the surface of the tableware 200 can be different, the amount and type of detergent put into the washing cavity 11 can be different, and the water quality of the liquid in the dishwasher 100 under low-temperature dishwashing and high-temperature dishwashing conditions is different, so that the water quality of the liquid in the dishwasher cannot be estimated.

[0065] In some related technologies, the washing mode of the dishwasher is fixed, and the washing time and the rinsing time cannot be adjusted flexibly in real time according to the water quality of the liquid in the dishwasher, and intelligent control cannot be realized. For example, in the case that the number of tableware to be washed is small or the volume is small, the contaminants in the washing cavity can be small, the required washing time is short, and the rinsing time is small, but the fixed washing mode cannot shorten the washing time and reduce the rinsing time, and water is easily wasted. For example, in the case that the number of tableware to be washed is large or the volume is large, the contaminants in the washing cavity can be large, the required washing time is long, and the rinsing time is large, but the fixed washing mode cannot prolong the washing time and increase the rinsing time, and the tableware is easily not washed clean.

[0066] In the present application, the conductivity of the liquid in the washing cavity 11 can be detected by the water quality detector 20, the real-time monitoring of the conductivity of the liquid in the dishwasher 100 is realized, and the machine body 10 can adjust the washing mode flexibly in real time according to the detection result of the water quality detector 20.

[0067] For example, if the number or size of the dishes 200 to be washed is small, there may be less contaminant in the washing chamber 11, and the detection result of the water quality detector 20 will be low. The machine body 10 can shorten the washing time and reduce the number of rinses based on the detection result, thus avoiding water waste. Conversely, if the number or size of the dishes 200 to be washed is large, there may be more contaminant in the washing chamber 11, and the detection result of the water quality detector 20 will be high. The machine body 10 can extend the washing time and increase the number of rinses based on the detection result, resulting in a better washing effect on the dishes 200.

[0068] Water quality monitoring during the water intake, washing, and rinsing processes of the dishwasher 100 is crucial for its intelligent control and is fundamental to ensuring thorough cleaning and rinsing. This application utilizes a water quality detector 20 to detect the conductivity of tap water during the water intake process, the conductivity of washing water during the washing process, and the conductivity of rinsing water during the rinsing process. This enables water quality monitoring during these processes, facilitating intelligent control of the dishwasher 100.

[0069] Therefore, this application can flexibly adjust the washing mode according to the number of dishes 200 to be washed, the volume of dishes 200 to be washed, or the amount of detergent used, which is conducive to realizing intelligent control.

[0070] In some embodiments, such as Figure 1 As shown, the circulation path 121 is equipped with a water quality detector 20. Both ends of the circulation path 121 are connected to the washing chamber 11, which facilitates the detection of the conductivity of the liquid during the water intake process, washing process and rinsing process, and realizes real-time monitoring of the conductivity of the liquid in the dishwasher 100. This allows the dishwasher 100 to flexibly adjust the washing mode according to the number of dishes 200 to be washed, the volume of dishes 200 to be washed or the amount of detergent used, which is conducive to realizing intelligent control.

[0071] For example, during the operation of the dishwasher 100, tap water is first introduced into the washing chamber 11. At this time, tap water is introduced into both the washing chamber 11 and the circulation path 121. The water quality detector 20 at the circulation path 121 can detect the conductivity of the tap water. Then, detergent is introduced into the washing chamber 11, so that the liquid in the washing chamber 11 is a mixture of tap water and detergent. The water quality detector 20 at the circulation path 121 can detect the conductivity of the washing water, so that the machine body 10 can control the washing time based on the detection results. After that, the washing water is drained, and tap water is repeatedly introduced into the washing chamber 11 to rinse the dishes 200, so that the liquid in the washing chamber 11 is the rinsing water. The rinsing water circulates between the washing chamber 11 and the circulation path 121 to repeatedly clean the dishes 200. The water quality detector 20 at the circulation path 121 can detect the conductivity of the rinsing water, so that the machine body 10 can control the rinsing time and the number of rinsing cycles based on the detection results.

[0072] In some embodiments, as shown in FIG. 1, the water quality detector 20 is arranged in the liquid inlet flow path 122, so as to detect the conductivity of the liquid during the water inlet process, and to monitor the water quality of the dishwasher 100, such as the hardness of the water, so that the dishwasher 100 can flexibly adjust the washing mode according to the detection result of the water quality detector 20. Figure 1

[0073] During the water supply process of the washing cavity 11, the contaminants such as oil on the tableware 200 may fall into the tap water in the washing cavity 11. If the conductivity of the tap water is detected through the water quality detector 20 arranged in at least one of the washing cavity 11 and the circulation flow path 121, the detection result may be inaccurate. However, the water quality detector 20 arranged in the liquid inlet flow path 122 can detect the conductivity of the tap water in the liquid inlet flow path 122, reduce the influence of other impurities such as contaminants in the washing cavity 11, and improve the detection accuracy of the conductivity of the tap water.

[0074] By detecting the conductivity of the tap water, for example, the hardness of the tap water can be determined, so that the dishwasher 100 can flexibly adjust the washing time, the rinsing time and the rinsing times, etc. according to the detection result of the water quality detector 20, and realize the intelligent control of the dishwasher 100.

[0075] In the embodiments in which the water quality detector 20 is arranged in at least one of the washing cavity 11 and the circulation flow path 121 and the liquid inlet flow path 122, as shown in FIG. 1, the conductivity of the tap water detected by the liquid inlet flow path 122 can be used as a standard to judge the conductivity of the liquid in the washing cavity 11 during the washing process and the rinsing process, so that the dishwasher 100 can accurately control the washing time and the rinsing times to realize the intelligent control, and the detection accuracy of the conductivity of the tap water is improved, which is beneficial to improve the accuracy of the intelligent control of the dishwasher 100, reduce the water consumption and improve the cleaning effect. Figure 1 The water quality detector 20 can be arranged in the washing cavity 11, the circulation flow path 121, both of the washing cavity 11 and the circulation flow path 121, both of the washing cavity 11 and the liquid inlet flow path 122, both of the circulation flow path 121 and the liquid inlet flow path 122, or all of the washing cavity 11, the circulation flow path 121 and the liquid inlet flow path 122.

[0076] In some embodiments, as shown in FIG. 1, the dishwasher 100 further comprises a circulation pump 46, which is arranged in the circulation flow path 121 and is used to drive the liquid to flow between the washing cavity 11 and the circulation flow path 121. The water quality detector 20 is arranged in the circulation flow path 121.

[0077] Figure 1

[0078] ​​​The circulation pump 46 and the water outlet end of the washing cavity 11 communicating with the circulation flow path 121 can be connected by a hose, the circulation pump 46 and the water inlet end of the washing cavity 11 communicating with the circulation flow path 121 can be connected by a hose, the two ends of the circulation flow path 121 are communicated with the washing cavity 11, and the circulation pump 46 is arranged in the circulation flow path 121, so that the circulation pump 46 is convenient to install. The water quality detector 20 can be arranged between the circulation pump 46 and the water outlet end of the washing cavity 11 communicating with the circulation flow path 121 (as shown in Figure 1 FIG. 2), or can be arranged between the circulation pump 46 and the water inlet end of the washing cavity 11 communicating with the circulation flow path 121.

[0079] The water quality detector 20 can be arranged between the water outlet end of the washing cavity 11 and the circulation pump 46, and the water outlet end of the washing cavity 11 communicating with the circulation flow path 121 is arranged at the bottom of the washing cavity 11, so that the height of the hose is as low as possible, the part of the hose installing the water quality detector 20 is filled with water, the electrodes 22 can be immersed in the liquid, the water quality detector 20 is convenient to install, and the water quality detector 20 is convenient to detect the conductivity of the liquid.

[0080] In some embodiments of the utility model, as shown in Figures 2-13 FIG. 3, the water quality detector 20 comprises a detector main body 21, and a plurality of electrodes 22 are arranged at one end of the detector main body 21, so that the electrodes 22 at one end of the detector main body 21 are arranged in the liquid at least one of the washing cavity 11 and the liquid flow path 12, such as the electrodes 22 arranged in the liquid flow path 12 or the washing cavity 11, to detect the conductivity of the liquid, and the installation is convenient.

[0081] In some embodiments, as shown in Figures 2-7 FIG. 4, the plurality of electrodes 22 are arranged in a regular polygon, so that the installation space at one end of the detector main body 21 is fully utilized, the area occupied by the plurality of electrodes 22 is reduced, any two electrodes 22 are spaced apart by a certain distance, the risk of short circuit caused by contact between adjacent electrodes 22 is reduced, and the safety is better.

[0082] For example, in some specific embodiments, as shown in Figures 2-4 FIG. 5, the plurality of electrodes 22 are three and arranged in a regular triangle, the three electrodes 22 form three electrode pairs, and the distance between the two electrodes 22 in each of the three electrode pairs of the water quality detector 20 is equal. The detection accuracy of the conductivity of the liquid in different conductivity range ranges is different for the electrode pairs with different distances between the two electrodes 22, the greater the distance between the two electrodes 22 in the electrode pair, the higher the detection accuracy of the conductivity of the liquid in the higher range of the conductivity range range for the electrode pair, and the higher range of the conductivity range range refers to a larger value of the conductivity in the conductivity range range. The length of the side of the regular triangle can be adjusted according to the range of the conductivity of the liquid, that is, the distance between any two electrodes 22 is adjusted, so that the detection accuracy of the conductivity in the range for any electrode pair is higher, and the detection accuracy of the water quality detector 20 for the conductivity in the range is improved.

[0083] For example, in some embodiments, as shown in Figures 5-7 , the plurality of electrodes 22 is four and arranged in a regular quadrilateral, the four electrodes 22 form six electrode pairs, the distance between each two electrodes 22 in the four electrode pairs of the water quality detector 20 is equal, the distance between each two electrodes 22 in the other two electrode pairs of the water quality detector 20 is equal, and the distance in the four electrode pairs is not equal to the distance in the other two electrode pairs. The length of the side of the regular quadrilateral can be adjusted according to the range of the electrical conductivity of the liquid, that is, the distance between the four electrodes 22 is adjusted, so that the electrode pairs with different distances between the two electrodes 22 are used to detect the electrical conductivity of the liquid in different electrical conductivity range, and the detection accuracy of the water quality detector 20 for the electrical conductivity of the liquid in different electrical conductivity range is improved.

[0084] In other embodiments, as shown in Figures 8-13 , the plurality of electrodes 22 are arranged at intervals along a straight line, so that the distance between the two electrodes 22 in the electrode pair of the water quality detector 20 can be as large as possible under the condition that the area of one end of the detector body 21 is constant, that is, the distance between the electrodes 22 at the two ends arranged at intervals along a straight line is the largest, so that the detection accuracy of the water quality detector 20 for the electrical conductivity of the liquid in more electrical conductivity range is higher.

[0085] In some embodiments, as shown in Figures 2-13 , the distance a between any two adjacent electrodes 22 is 1mm-20mm. The distance a between any two adjacent electrodes 22 is the minimum distance between the surfaces of the two electrodes 22, as shown by the dimension a in Figures 2-13 . Different electrodes 22 cannot be in direct contact because direct contact between different electrodes 22 will cause the water quality detector 20 to short circuit. If the distance a is too small and different electrodes 22 cannot be in direct contact, the manufacturing difficulty of the water quality detector 20 will be too great, and the water quality detector 20 will be difficult to popularize. If the distance a is too large, the volume of the water quality detector 20 will be too large, and the installation space for installing the water quality detector 20 in the dishwasher 100 will be too high, which will be difficult to install. In the present application, the distance a is 1mm-20mm, which is beneficial to reduce the manufacturing difficulty and installation space of the water quality detector 20, so that the dishwasher 100 of the present application is easy to popularize. For example, the distance a is 1mm, 10mm or 20mm, etc.

[0086] In some embodiments of the present application, as shown in Figure 7 , Figure 10 and Figure 13 , in any two electrode pairs, one electrode pair can measure a larger electrical conductivity range, and the distance between the two electrodes 22 in the electrode pair is D1, and the other electrode pair can measure a smaller electrical conductivity range, and the distance between the two electrodes 22 in the electrode pair is D2, and D1≥D2.

[0087] The greater the distance between the two electrodes 22 in an electrode pair, the higher the detection accuracy of the electrode pair for the conductivity of a liquid in a higher range of conductivity ranges. The present application uses electrode pairs with greater distances between the two electrodes 22 to detect the conductivity of a liquid in a higher range of conductivity ranges, and uses electrode pairs with smaller distances between the two electrodes 22 to detect the conductivity of a liquid in a lower range of conductivity ranges, thereby improving the detection accuracy of the water quality detector 20 for the conductivity of a liquid in different ranges of conductivity ranges.

[0088] For example, in some embodiments, as shown in FIG. 1, the electrodes 22 are three, and the three electrodes 22 are arranged at one end of the detector body 21 and are arranged in a straight line. The distance between the electrodes 22 at both ends is the greatest, and the distance between the electrode 22 in the middle and the electrodes 22 at both ends can be equal or not equal, so that the three electrodes 22 form three electrode pairs. Different electrode pairs with the same or different distances between the two electrodes 22 are used to detect the conductivity of a liquid in different ranges of conductivity ranges, so as to improve the detection accuracy of the water quality detector 20 for the conductivity of a liquid in different ranges of conductivity ranges. Figures 8-13 For example, in some embodiments, as shown in FIG. 1, the electrodes 22 are three, and the three electrodes 22 are arranged at one end of the detector body 21 and are arranged in a straight line. The distance between the electrodes 22 at both ends is the greatest, and the distance between the electrode 22 in the middle and the electrodes 22 at both ends can be equal or not equal, so that the three electrodes 22 form three electrode pairs. Different electrode pairs with the same or different distances between the two electrodes 22 are used to detect the conductivity of a liquid in different ranges of conductivity ranges, so as to improve the detection accuracy of the water quality detector 20 for the conductivity of a liquid in different ranges of conductivity ranges.

[0089] Figures 5-7 For example, in some embodiments, as shown in FIG. 1, the electrodes 22 are three, and the three electrodes 22 are arranged at one end of the detector body 21 and are arranged in a straight line. The distance between the electrodes 22 at both ends is the greatest, and the distance between the electrode 22 in the middle and the electrodes 22 at both ends can be equal or not equal, so that the three electrodes 22 form three electrode pairs. Different electrode pairs with the same or different distances between the two electrodes 22 are used to detect the conductivity of a liquid in different ranges of conductivity ranges, so as to improve the detection accuracy of the water quality detector 20 for the conductivity of a liquid in different ranges of conductivity ranges.

[0090] In some embodiments of the present application, as shown in FIG. 1, the electrodes 22 are three or four. In the case of two electrodes 22, when one of the electrodes 22 fails, such as being covered by contaminants, the detection accuracy of the water quality detector 20 is greatly reduced, which can easily lead to the intelligent control of the dishwasher 100 out of control, such as too long washing time, too many rinsing times, etc. Too many electrodes 22 can result in a too complex structure of the water quality detector 20, too high manufacturing cost, too large size of the water quality detector 20, high installation space requirement, and high installation difficulty. In the present application, the electrodes 22 of the water quality detector 20 are three or four. Even if one of the electrodes 22 fails, the other two electrodes 22 that do not fail can form an electrode pair to detect the conductivity of a liquid, thereby ensuring the detection accuracy of the water quality detector 20, preventing the intelligent control of the dishwasher 100 from being out of control, and reducing the size of the water quality detector 20, the installation difficulty, and the manufacturing cost. Figures 2-13

[0091] ​​In some embodiments of the utility model, as shown in Figures 2-10 The electrode 22 is a cylindrical electrode, which is easy to manufacture due to low processing difficulty.

[0092] In some other embodiments, as shown in Figures 11-13 The electrode 22 is a sheet electrode, and a plurality of sheet electrodes are arranged along the thickness direction. The thickness direction is the arrangement direction of the two surfaces of the sheet electrode with the smallest distance. For example Figures 11-13 As shown in the figure, the thickness direction of the sheet electrode is parallel to the left-right direction, and a plurality of sheet electrodes are arranged along the left-right direction. The sheet electrode has a large surface area and a large contact area with the liquid, and the detection accuracy of the electrical conductivity of the liquid is higher.

[0093] In some embodiments of the utility model, the dishwasher 100 further comprises a plurality of load resistors, and the plurality of load resistors are respectively connected in series with the plurality of electrode pairs. The number of load resistors can be two, three or more, and the resistance value of the load resistor can be 200 ohms to 5000 ohms.

[0094] The same electrode pair is connected in series with a load resistor with different resistance values. The smaller the resistance value of the load resistor, the higher the detection accuracy of the electrode pair for the electrical conductivity of the liquid in the higher range of the conductivity range. The plurality of electrode pairs connected in series with the plurality of load resistors can be used to detect the electrical conductivity of the liquid in different conductivity ranges, respectively, which is beneficial to improve the detection accuracy of the water quality detector 20 for the electrical conductivity of the liquid in different conductivity ranges.

[0095] The specific form of the load resistor can be determined according to the actual circuit wiring diagram. For example, each load resistor connected in series with the electrode pair is composed of a plurality of specific resistors, and the resistance value of the load resistor connected in series with each electrode pair can be determined.

[0096] In some other embodiments, the dishwasher 100 further comprises at least one load resistor, and any load resistor can be connected in series with any electrode pair in the plurality of electrode pairs. The same load resistor can be selectively connected in series with any electrode pair, and the electrode pair connected in series with the selected load resistor can be selected to detect the electrical conductivity of the liquid, for example, the electrode pair is selected according to the correspondence between the distance between the two electrodes 22 and the conductivity range, which is beneficial to improve the detection accuracy of the water quality detector 20 for the electrical conductivity of the liquid in different conductivity ranges.

[0097] As shown in Figure 14 The control method of the dishwasher 100 according to the embodiments of the utility model comprises:

[0098] S11: detecting the electrical conductivity of the liquid by the plurality of electrode pairs, respectively.

[0099] The water quality detector 20 includes a plurality of electrodes 22, any two electrodes 22 forming an electrode pair, so that the water quality detector 20 includes a plurality of electrode pairs, each electrode pair being capable of detecting the electrical conductivity of the liquid to obtain an electrical conductivity, and the electrical conductivity of the liquid being detected by the plurality of electrode pairs to obtain a plurality of electrical conductivities.

[0100] S12: Calculate the average of the plurality of electrical conductivities, the average being the detection result of the water quality detector 20.

[0101] The plurality of electrical conductivities detected by the plurality of electrode pairs are added and divided by the number of electrode pairs to obtain the average of the plurality of electrical conductivities, so that the machine body 10 works according to the average.

[0102] By averaging the above plurality of electrical conductivities, each electrode 22 is used, which can reduce the detection error of the water quality detector 20 and improve the detection accuracy of the water quality detector 20. Even if there is a faulty electrode, compared to the electrical conductivity detected by the electrode pair with the faulty electrode as the detection result, the application uses the average of the plurality of electrical conductivities as the detection result, which can reduce the adverse effects of the possible faulty electrode and improve the detection accuracy of the water quality detector 20.

[0103] Since the dishwasher 100 according to the embodiment of the utility model has the above-mentioned beneficial technical effects, the control method of the dishwasher 100 according to the embodiment of the utility model detects the electrical conductivity of the liquid at least one of the washing cavity 11 and the liquid flow path 12 by the water quality detector 20, so that the machine body 10 can work according to the detection result of the water quality detector 20, so as to flexibly adjust the washing time, the rinsing time and the rinsing times according to the electrical conductivity of the liquid in the dishwasher 100, so that the washing mode of the dishwasher 100 is adjustable, the intelligent control of the dishwasher 100 can be realized, the water is not easy to waste, the washing effect of the tableware 200 is better, and the detection accuracy of the water quality detector 20 is higher and the detection function is more reliable.

[0104] In some embodiments, as shown in Figure 14 the control method further comprises:

[0105] S13: Calculate the difference between the maximum electrical conductivity and the minimum electrical conductivity in the plurality of electrical conductivities, and issue a prompt information when the difference is greater than a set multiple of the minimum electrical conductivity.

[0106] The set multiple can be determined according to the volume of the washing cavity 11 and the like, for example, the set multiple can be 1-2 times, such as 1.1 times, 1.5 times or 2 times and the like. If the difference is greater than the set multiple of the minimum conductivity, it can be judged that the water quality detector fails, such as a faulty electrode, and then a prompt information is sent to prompt the user to contact the technical personnel for maintenance. The prompt information can be sent after the dish washing machine 100 completes the dish washing work, or can be sent during the dish washing work of the dish washing machine 100; the prompt information can be sent on the display screen of the dish washing machine, or can be sent on the mobile device connected with the dish washing machine 100, and the sending time and sending platform of the prompt information are not limited as long as the user can be prompted.

[0107] As shown in the control method of the dish washing machine 100 according to the embodiments of the present application, Figure 15

[0108] S21: detecting the initial conductivity by any electrode pair.

[0109] The water quality detector 20 includes a plurality of electrodes 22, any two electrodes 22 form an electrode pair, so that the water quality detector 20 includes a plurality of electrode pairs, and the conductivity of the liquid is detected by any electrode pair, and the conductivity is recorded as the initial conductivity.

[0110] S22: judging the conductivity range range where the initial conductivity is located, and selecting the corresponding load resistance corresponding to the conductivity range range. Wherein, the higher the conductivity range range, the smaller the resistance value of the load resistance.

[0111] The conductivity range range can be determined according to the conductivity of different liquids. For example, the conductivity of tap water is generally 100-200 μs / cm, and the conductivity of washing water mixed with detergent is generally 9000-10000 μs / cm, 0-1000 μs / cm can be used as the low range conductivity range, 1000-3000 μs / cm can be used as the medium range conductivity range, and greater than 3000 μs / cm can be used as the high range conductivity range.

[0112] The same electrode pair is connected in series with the load resistance with different resistance values, and the smaller the resistance value of the load resistance, the higher the detection accuracy of the electrode pair for the conductivity of the liquid in the high range conductivity range. The load resistance with smaller resistance value can be matched with the high range conductivity range, and the load resistance with larger resistance value can be matched with the low range conductivity range. For example, if the initial conductivity is in the high range conductivity range, the load resistance with smaller resistance value is selected.

[0113] S24: conducting conductivity detection.​

[0114] The load resistor is connected in series with any one electrode pair to detect the conductivity of the liquid through the electrode pair by selecting the load resistor.

[0115] The load resistor with different resistance values corresponds to the conductivity range of different ranges, and the conductivity of different liquids may be in different conductivity ranges. According to the conductivity range in which the initial conductivity is located, the load resistor with different resistance values is connected in series with any one electrode pair to detect the conductivity of the liquid through the electrode pair, which is beneficial to improve the detection accuracy of the water quality detector 20 for the conductivity of the liquid in different conductivity ranges. And the load resistor is connected in series with any one electrode pair to detect the conductivity of the liquid, which is beneficial to reduce the usage rate of each electrode 22 and prolong the service life of the water quality detector 20.

[0116] Since the dishwasher 100 according to the embodiment of the utility model has the above beneficial technical effects, the control method of the dishwasher 100 according to the embodiment of the utility model detects the conductivity of the liquid at least one of the washing cavity 11 and the liquid flow path 12, so that the machine body 10 can work according to the detection result of the water quality detector 20, to flexibly adjust the washing time, rinsing time and rinsing times according to the conductivity of the liquid in the dishwasher 100, so that the washing mode of the dishwasher 100 is adjustable, the intelligent control of the dishwasher 100 can be realized, the water is not easily wasted, the washing effect of the tableware 200 is better, and the detection accuracy of the water quality detector 20 is higher and the detection function is more reliable.

[0117] In some embodiments, the corresponding electrodes 22 of the at least two electrode pairs are different in spacing. As shown in Figures 15-16 Before the conductivity detection, the control method further includes:

[0118] S23: Determine the conductivity range in which the initial conductivity is located, and select the electrode pair corresponding to the conductivity range. Among the two adjacent conductivity ranges, the electrode 22 spacing corresponding to the lower conductivity range is less than or equal to the electrode 22 spacing corresponding to the higher conductivity range.

[0119] The detection accuracy of the electrode pair with different electrode 22 spacings for the conductivity of the liquid in different conductivity ranges is different. The greater the spacing of the two electrodes 22 in the electrode pair, the higher the detection accuracy of the electrode pair for the conductivity of the liquid in the higher range of the conductivity range. The electrode pair with larger spacing can be matched with the high range conductivity range, and the electrode pair with smaller spacing can be matched with the low range conductivity range. For example, if it is determined that the initial conductivity is in the high range conductivity range, the electrode pair with larger electrode 22 spacing is selected.

[0120] Load resistors with different resistance values ​​correspond to different conductivity ranges. Electrode pairs with different spacing between the two electrodes 22 also correspond to different conductivity ranges. The conductivity ranges of different liquids may be different. Load resistors with different resistance values ​​are selected according to the conductivity range of the initial conductivity and connected in series with electrode pairs with different spacing between the two electrodes 22 so as to detect the conductivity of the liquid through the electrode pairs. This helps to improve the detection accuracy of the water quality detector 20 for the conductivity of liquids in different conductivity ranges.

[0121] Of course, for two conductivity ranges with similar ranges, the spacing between the electrode pairs can also be equal, such that the spacing between the two electrodes 22 in the electrode pair corresponding to the lower conductivity range is less than or equal to the spacing between the two electrodes 22 in the electrode pair corresponding to the higher conductivity range.

[0122] It should be noted that steps S22 and S23 are not necessarily in any particular order. For example, in some embodiments, such as Figure 16 As shown, step S22 is performed first, followed by step S23. That is, the corresponding load resistor is selected according to the conductivity range of the initial conductivity, and then the electrode pair connected in series with the load resistor is selected according to the conductivity range of the initial conductivity. This allows the electrode pair connected in series with the load resistor to be changed while keeping the load resistor constant.

[0123] For example, in some embodiments, step S23 is performed first and then step S22 is performed. That is, the corresponding electrode pair is selected according to the conductivity range of the initial conductivity, and then the load resistor connected in series with the electrode pair is selected according to the conductivity range of the initial conductivity. This allows the load resistor connected in series with the electrode pair to be changed without changing the electrode pair. The order of each step in the control method is flexible and adjustable.

[0124] In some embodiments, such as Figure 15 and Figure 17 As shown, S24 includes:

[0125] S241: Connect the load resistor in series with multiple electrode pairs and detect the conductivity of the liquid.

[0126] Determine the conductivity range within which the initial conductivity falls, and select the corresponding load resistor based on this conductivity range. Connect the load resistor in series with multiple electrode pairs, and detect the conductivity of the liquid through the multiple electrode pairs to obtain multiple conductivity values.

[0127] S242: Calculate the average value of multiple conductivity values, which is the detection result of water quality detector 20.

[0128] The multiple conductivities are added together and divided by the number of electrode pairs to obtain an average of the multiple conductivities, so that the body 10 works according to the average.

[0129] According to the selection of the corresponding load resistance according to the conductivity range of the initial conductivity, the detection accuracy of the water quality detector 20 for the conductivity of the liquid in the corresponding conductivity range can be improved. And by averaging the multiple conductivities, each electrode 22 can be used to reduce the detection error of the water quality detector 20, which is beneficial to improve the detection accuracy of the water quality detector 20. Even if there is a faulty electrode, the adverse effects of the possible faulty electrode can be reduced, and the detection accuracy of the water quality detector 20 can be improved.

[0130] The control method of the dishwasher 100 according to the embodiment of the utility model, comprising:

[0131] S3: In the process of detecting the conductivity of the liquid by any electrode pair, the polarity of the corresponding two electrodes 22 is alternated.

[0132] Among them, any electrode pair refers to any one of the multiple electrode pairs in the water quality detector 20, and the corresponding two electrodes 22 refer to the two electrodes 22 forming the electrode pair.

[0133] The polarity alternation refers to that in the working process of an electrode pair, one electrode 22 in the electrode pair acts as an anode and the other electrode 22 acts as a cathode, and one conductivity is measured, which can be measured once or multiple times. Then, the polarity of the two electrodes 22 in the electrode pair is alternated, so that the electrode 22 originally acting as an anode becomes a cathode, and the electrode 22 originally acting as a cathode becomes an anode, and another conductivity is measured, which can be measured once or multiple times. In the working process of an electrode pair, the polarity of the two electrodes 22 in an electrode pair can be alternated once or multiple times.

[0134] The electrode pair has an electrode reaction in the liquid, and one electrode pair works in the liquid for a long time, which is easy to form pollutants on the surface of the electrode 22, for example, the surface of the electrode 22 acting as a cathode is easy to produce deposits, which reduces the service life of the electrode 22. The application can control the polarity alternation of the two electrodes 22 in the electrode pair during the working process of the electrode pair, for example, the deposits on the surface of the electrode 22 acting as a cathode will gradually dissolve after the electrode 22 acting as a cathode is converted to an anode. By controlling the polarity alternation of the two electrodes 22 in an electrode pair, the formation of pollutants on the surface of the electrode 22 can be effectively reduced, which is beneficial to prolong the service life of the electrode 22 and further prolong the service life of the water quality detector 20.

[0135] Since the dish washing machine 100 has the beneficial technical effects described above, the control method of the dish washing machine 100 according to the embodiment of the utility model, through the water quality detector 20 detecting the conductivity of the liquid at least one of the washing cavity 11 and the liquid flow path 12, the machine body 10 can work according to the detection result of the water quality detector 20, to flexibly adjust the washing time, the rinsing time and the rinsing times according to the conductivity of the liquid in the dish washing machine 100, so that the washing mode of the dish washing machine 100 is adjustable, the intelligent control of the dish washing machine 100 can be realized, water is not easy to waste, the washing effect of the tableware 200 is better, and the detection accuracy of the water quality detector 20 is higher and the detection function is more reliable.

[0136] In some embodiments, the "controlling polarity alternation of the corresponding two electrodes 22" in S3 comprises:

[0137] S31: controlling one of the electrodes 22 as an anode and the other electrode 22 as a cathode and detecting a first conductivity.

[0138] In this step, the liquid can be detected by the electrode pair once to obtain the first conductivity, and the detection efficiency is high. The liquid can also be detected by the electrode pair multiple times to obtain multiple conductivities, and the average of the multiple conductivities is calculated as the first conductivity, which is beneficial to reduce the detection error of the water quality detector 20 and improve the detection accuracy.

[0139] S32: controlling one of the electrodes 22 as a cathode and the other electrode 22 as an anode and detecting a second conductivity.

[0140] The electrode 22 acting as an anode in S31 acts as a cathode in S32, and the electrode 22 acting as a cathode in S31 acts as an anode in S32, realizing the polarity alternation of the two electrodes 22 in one electrode pair once.

[0141] Similarly, in this step, the liquid can be detected by the electrode pair once to obtain the second conductivity, improving the detection efficiency; or the liquid can be detected by the electrode pair multiple times to obtain multiple conductivities and obtain the second conductivity after averaging, improving the detection accuracy.

[0142] S33: calculating the average of the first conductivity and the second conductivity to obtain the conductivity of the liquid.

[0143] The first conductivity and the second conductivity are added and divided by two to obtain the average of the first conductivity and the second conductivity, so that the machine body 10 works according to the average.

[0144] In the process of detecting the conductivity of the liquid by any electrode pair, the two conductivities before and after the polarity alternation of the two electrodes 22 in the electrode pair are used, and the first conductivity or the second conductivity is not directly used as the final conductivity, so as to reduce the possible errors in the detection process and improve the detection accuracy. The polarity alternation of the two electrodes 22 in the electrode pair can reduce the number of times that each electrode 22 in the electrode pair acts as an anode or a cathode, so as to prolong the service life of the electrode 22.

[0145] In some embodiments, as shown in step S11, the conductivities of the liquid are detected by the plurality of electrode pairs respectively, the polarity of the two electrodes 22 in each electrode pair can be alternated to calculate the average value after alternately detecting the conductivity of the liquid, so that each electrode 22 does not always act as an anode or a cathode, which is beneficial to prolong the service life of the electrode 22. Figure 14

[0146] In some embodiments, as shown in step S21, the initial conductivity is detected by any electrode pair, and the polarity of the two electrodes 22 in the electrode pair can be alternated, and in step S24, the conductivity detection is performed, and the polarity of the two electrodes 22 in the electrode pair for detecting the conductivity of the liquid can be alternated to calculate the average value after alternately detecting the conductivity of the liquid, which is beneficial to prolong the service life of the electrode 22. Figures 15-16

[0147] In some embodiments, as shown in step S241, the load resistance is connected in series with the plurality of electrode pairs respectively, and the conductivity of the liquid is detected, the polarity of the two electrodes 22 in each electrode pair can be alternated to calculate the average value after alternately detecting the conductivity of the liquid, which is beneficial to prolong the service life of the electrode 22. Figure 17

[0148] The dishwasher 100 according to the first specific embodiment of the present application will be described in detail below with reference to the accompanying drawings, and it should be understood that the following description is only exemplary and cannot be understood as a limitation of the present application.

[0149] As shown in Figures 1-4 According to one specific embodiment of the dishwasher 100 of the present application, the dishwasher 100 comprises a machine body 10, three water quality detectors 20, three load resistances, a water inlet valve 41, a breather 42, a water softener 43, two spray arms 44, a dining rack 45, a circulating pump 46, a filter 47 and an inner container 48.

[0150] ​​​The inner container 48 is arranged in the machine body 10 and defines a washing cavity 11, and the machine body 10 has a liquid flow path 12 communicating with the washing cavity 11. The washing cavity 11 is provided with a dish rack 45 for placing dishes 200. The liquid flow path 12 includes an inlet liquid flow path 122, a circulating liquid flow path 121 and an outlet liquid flow path 123. The inlet liquid flow path 122 communicates the washing cavity 11 and a water source to supply water into the washing cavity 11. An inlet water valve 41 is arranged in the inlet liquid flow path 122 to control the opening and closing, flow rate and the like of the inlet water. A breather 42 is arranged in the inlet liquid flow path 122 to calculate the water amount of the inlet liquid flow path 122. A water softener 43 is arranged in the inlet liquid flow path 122 to reduce scale formation.

[0151] The circulating liquid flow path 121 communicates with the washing cavity 11 at one end and communicates with the washing cavity 11 through a spray arm 44 at the other end to circulate the liquid between the washing cavity 11 and the circulating liquid flow path 121, thereby achieving the reuse of water resources. A filter 47 is arranged at the end of the circulating liquid flow path 121 away from the spray arm 44 to filter impurities such as vegetable residues in the washing cavity 11, thereby reducing the risk of blockage of the circulating liquid flow path 121. The liquid in the washing cavity 11 flows into the circulating liquid flow path 121 after being filtered by the filter 47. A circulating pump 46 is arranged in the circulating liquid flow path 121 to pump the liquid at one end of the circulating liquid flow path 121 to the spray arm 44 at the other end, so that the liquid flowing into the circulating liquid flow path 121 can flow to the spray arm 44 to be sprayed onto the dishes 200 in the washing cavity 11 by the spray arm 44, thereby washing the dishes 200.

[0152] The outlet liquid flow path 123 communicates the washing cavity 11 and a drain to drain the dirty water in the washing cavity 11.

[0153] Each water quality detector 20 includes a detector body 21 and three electrodes 22 arranged at one end of the detector body 21 and distributed in a regular triangle. The electrodes 22 are cylindrical electrodes, which are easy to manufacture. The three electrodes 22 include a first electrode 221, a second electrode 222 and a third electrode 223. The first electrode 221 and the second electrode 222 form a first electrode pair (denoted as electrode pair B1), the second electrode 222 and the third electrode 223 form a second electrode pair (denoted as electrode pair B2), and the third electrode 223 and the first electrode 221 form a third electrode pair (denoted as electrode pair B3). Any electrode pair can be used to detect the conductivity of the liquid at least one of the washing cavity 11 and the liquid flow path 12.

[0154] Three water quality detectors 20 are respectively arranged in the liquid inlet flow path 122, the washing cavity 11 and the circulation flow path 121, wherein the water quality detector 20 arranged in the liquid inlet flow path 122 is used to detect the conductivity of tap water, and the detection accuracy of the water quality detector 20 for the conductivity of tap water is higher. The water quality detectors 20 arranged in the washing cavity 11 and the circulation flow path 121 are used to detect the conductivity of washing water and rinsing water. The machine body 10 can work according to the detection results of the water quality detectors 20, for example, the machine body 10 can adjust the washing time, the rinsing time and the rinsing time according to the detection results, which is beneficial to realize the intelligent control of the dishwasher 100.

[0155] The three load resistors include a first load resistor (denoted as load resistor R1), a second load resistor (denoted as load resistor R2) and a third load resistor (denoted as load resistor R3) arranged from large to small in resistance value, the load resistor R1 is in series with the electrode pair B1, the load resistor R2 is in series with the electrode pair B2, and the load resistor R3 is in series with the electrode pair B3. The smaller the resistance value of the load resistor is, the higher the detection accuracy of the electrode pair in series with the load resistor for the conductivity of the liquid in the high-range conductivity range is. Therefore, the detection accuracy for the conductivity of the liquid in the low-range conductivity range can be improved by the load resistor R1 and the electrode pair B1, the detection accuracy for the conductivity of the liquid in the medium-range conductivity range can be improved by the load resistor R2 and the electrode pair B2, and the detection accuracy for the conductivity of the liquid in the high-range conductivity range can be improved by the load resistor R3 and the electrode pair B3, which is beneficial to improve the detection accuracy of the water quality detector 20 for the conductivity of the liquid in different conductivity ranges.

[0156] The dishwasher 100 according to the second specific embodiment of the present application will be described in detail below with reference to the drawings, and it should be understood that the following description is only exemplary and cannot be understood as a limitation of the present application.

[0157] As shown in Figure 1 and Figures 5-7 The dishwasher 100 according to one specific embodiment of the present application includes a machine body 10, three water quality detectors 20, a plurality of load resistors, a water inlet valve 41, a breather 42, a water softener 43, two spray arms 44, a rack 45, a circulation pump 46, a filter 47 and an inner container 48. Among them, the water quality detector 20 and the load resistor are different from the first specific embodiment.

[0158] Specifically, each water quality detector 20 includes a detector body 21 and four electrodes 22. The four electrodes 22 are located at one end of the detector body 21 and are arranged in a regular quadrilateral shape. The four electrodes 22 are paired in pairs to form six electrode pairs with two different spacings. Specifically, in four electrode pairs, the spacing between the two electrodes 22 is equal, and in the other two electrode pairs, the spacing between the two electrodes 22 is equal, while the two spacings are not equal. The larger the spacing between the two electrodes 22 in an electrode pair, the higher the detection accuracy of the electrode pair for the conductivity of liquids within a higher conductivity range. By adjusting the side length of the regular quadrilateral, the detection accuracy of the water quality detector 20 for the conductivity of liquids within the two conductivity ranges can be improved.

[0159] The system comprises six load resistors arranged in descending order of resistance, with each load resistor connected in series with a corresponding electrode pair. For two load resistors with similar resistance values, the distance between the two electrodes 22 in the electrode pair connected in series with the load resistor with the larger resistance value is less than or equal to the distance between the two electrodes 22 in the electrode pair connected in series with the load resistor with the smaller resistance value. This design balances the detection accuracy of liquid conductivity across different conductivity ranges for load resistors with varying resistance values ​​and electrode pairs with different electrode spacings, thereby improving the detection accuracy of the water quality detector 20 for liquids across a wider range of conductivity values.

[0160] The dishwasher 100 according to the third specific embodiment of the present invention is described in detail below with reference to the accompanying drawings. It is worth understanding that the following description is merely illustrative and should not be construed as limiting the present invention.

[0161] like Figure 1 and Figures 8-10 As shown, a dishwasher 100 according to a specific embodiment of the present invention includes a body 10, three water quality detectors 20, three load resistors, a water inlet valve 41, a breather 42, a water softener 43, two spray arms 44, a dish rack 45, a circulation pump 46, a filter element 47, and an inner tank 48. The structure of the water quality detectors 20 differs from that of the first embodiment.

[0162] Specifically, each water quality detector 20 includes a detector body 21 and three electrodes 22, which are located at one end of the detector body 21 and spaced apart along a straight line. The three electrodes 22 include a first electrode 221, a second electrode 222, and a third electrode 223, forming electrode pairs B1, B2, and B3. The distance between the first electrode 221 and the second electrode 222 in electrode pair B1 is equal to the distance between the second electrode 222 and the third electrode 223 in electrode pair B2, and the distance between the first electrode 221 and the second electrode 222 in electrode pair B1 is less than the distance between the third electrode 223 and the first electrode 221 in electrode pair B3.

[0163] The three load resistors include a load resistor R1, a load resistor R2 and a load resistor R3, the load resistor R1 is connected in series with the electrode pair B1, the load resistor R2 is connected in series with the electrode pair B2, and the load resistor R3 is connected in series with the electrode pair B3. For two load resistors with similar resistance values, the distance between the two electrodes 22 in the electrode pair connected in series with the load resistor with a larger resistance value is less than or equal to the distance between the two electrodes 22 in the electrode pair connected in series with the load resistor with a smaller resistance value, which can balance the detection accuracy of the electrode pairs with different distances between the two electrodes 22 and different resistance values of the load resistors for the electrical conductivity of the liquid in different conductivity ranges, and is beneficial to improving the detection accuracy of the water quality detector 20 for the electrical conductivity of the liquid in more different conductivity ranges.

[0164] The dishwasher 100 according to the fourth specific embodiment of the present application will be described in detail below with reference to the drawings, and it should be understood that the following description is only exemplary and should not be construed as limiting the present application.

[0165] As shown in Figure 1 and Figures 11-13 The dishwasher 100 according to one specific embodiment of the present application includes a body 10, three water quality detectors 20, three load resistors, a water inlet valve 41, a breather 42, a water softener 43, two spray arms 44, a rack 45, a circulating pump 46, a filter 47 and an inner tank 48. Among them, the structure of the water quality detector 20 is different from that of the third specific embodiment.

[0166] Specifically, each water quality detector 20 includes a detector body 21 and three electrodes 22, the electrodes 22 are sheet electrodes, the three sheet electrodes are arranged in a thickness direction, the sheet electrodes have a large surface area and a large contact area with the liquid, which is beneficial to improve the detection accuracy of the electrical conductivity of the liquid.

[0167] Other configurations and operations of the dishwasher 100 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0168] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0169] In the description of the present specification, the description referring to the terms "embodiment", "specific embodiment", "example", and the like means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0170] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A dishwasher, characterized in that The machine body has a washing cavity and a liquid flow path in communication with the washing cavity; The water quality detector is provided on the machine body and includes a plurality of electrodes, the number of the electrodes is greater than or equal to three, any two of the plurality of electrodes form an electrode pair, any electrode pair can be used to detect the conductivity of the liquid in at least one of the washing cavity and the liquid flow path, and the machine body is adapted to operate according to the detection result of the water quality detector.

2. The dishwasher according to claim 1, wherein The water quality detector includes a detector body, and a plurality of electrodes are provided at one end of the detector body, wherein the plurality of electrodes are arranged in a regular polygon or are arranged along a straight line at intervals. In any two electrode pairs, one electrode pair has a larger conductivity range, and the distance between the two electrodes in the electrode pair is D1, 3. The warewash machine of claim 2, wherein, The other electrode pair has a smaller conductivity range, and the distance between the two electrodes in the electrode pair is D2, D1≥D2. The electrodes are three, and the three electrodes are arranged at one end of the detector body and are arranged along a straight line at intervals.

4. The warewash machine of claim 3, wherein, The electrodes are four, and the four electrodes are arranged at one end of the detector body and are arranged in a regular quadrilateral.

5. The warewashing machine of claim 3, wherein, The distance between any two adjacent electrodes is 1mm-20mm. 6.The dish washer of claim 1, wherein The electrodes are sheet electrodes, and a plurality of sheet electrodes are arranged at intervals in the thickness direction.

7. The warewashing machine of claim 1, wherein, 8. The dishwasher according to claim 1, wherein The dishwasher further includes a plurality of load resistors, and the plurality of load resistors are respectively connected in series with the plurality of electrode pairs; or The dishwasher further includes at least one load resistor, and any load resistor is adapted to be connected in series with any electrode pair of the plurality of electrode pairs. The liquid flow path includes a circulation flow path and a liquid inlet flow path, the liquid inlet flow path is in communication with the washing cavity and is used to supply water to the washing cavity, and the washing cavity is in communication with both ends of the circulation flow path to enable liquid to flow between the washing cavity and the circulation flow path; 9.The dish washer of claim 1, wherein At least one of the liquid inlet flow path, the washing cavity and the circulation flow path is provided with the water quality detector; or at least one of the washing cavity and the circulation flow path and the liquid inlet flow path is provided with the water quality detector. The liquid flow path includes a circulation flow path, the washing cavity is in communication with both ends of the circulation flow path, the dishwasher further includes a circulation pump provided in the circulation flow path, the circulation pump is used to drive liquid to flow between the washing cavity and the circulation flow path, and the circulation flow path is provided with the water quality detector.

10. The dishwasher according to any one of claims 1 to 9, characterized in that ​

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