A dishwasher

Abstract

The present application belongs to the technical field of dishwashers, and provides a dishwasher, including an inner tank, a water storage container is provided on the inner tank, a top cover and a water adding tray are provided on the top of the water storage container, a water inlet is provided on the top cover, and a diversion port connected to the water inlet is provided on the water adding tray; a diversion cover is provided on the water adding tray, and the diversion cover is provided with a water level sensing mechanism for detecting the water storage amount of the water storage container, and the water level sensing mechanism includes a float and a conduit connected to the bottom of the diversion cover, and the conduit passes through the water inlet and is inserted into the water storage container; a sensing element is provided on the float, and the float is provided in the conduit and can move up and down in the conduit with the change of the water level; and a sensing trigger device is provided on the diversion cover. The present application improves the water level sensing mechanism on a dishwasher with a built-in water tank, which can not only improve the triggering sensitivity between the sensing components, but also allow the water level sensing mechanism to be set separately, which is convenient for installation or replacement, and is conducive to reducing the manufacturing cost of the built-in water tank.

Description

Technical Field

[0001] The present application belongs to the technical field of dishwashers, and particularly refers to a dishwasher. Background Art

[0002] With the development of science and technology and the improvement of living standards, especially the rapid development of home appliance technology, there are special dishwashing equipment for tableware cleaning. A multifunctional dishwasher generally has functions such as spraying, drying, and sterilization. Users only need to put dishes and other tableware into the dishwasher, and the dishwasher can automatically complete a series of cleaning tasks according to the user's settings. It is easy to use and fully automated, which effectively reduces the user's operation. Therefore, dishwashers are becoming more and more popular in thousands of households and are deeply loved by the majority of users.

[0003] Most dishwashers currently sold on the market are equipped with two water supply methods: tap water supply or water supply through water tank storage. The water tank water supply or the water valve used to control the water inlet are both used to wash the dishes in the washing chamber, so the water supply method is selected according to the needs of the usage. In order to cooperate with the above-mentioned water supply methods, the dishwasher of the prior art is generally provided with a built-in water tank inside the dishwasher. The common built-in water tank structure is to design the water tank as a separate component, and the water tank and the inner tank of the dishwasher are connected and fixed to the inner tank by setting a corresponding connection structure.

[0004] In actual applications, in order to promptly remind users of the amount of water added to the built-in water tank, a water level sensing device for detecting the water level in the water tank is generally provided. There are two main types of water level sensing devices for built-in water tanks used in dishwashers in the prior art. One is that the water tank and the inner tank are provided with mutually cooperating sensing components, such as a sensing component provided on a float, and a sensing trigger component provided on the inner tank, and the two cooperate with each other and trigger a reminder signal. This structure can avoid the risk of wading due to the setting of the sensing trigger component in the water tank, but the sensing matching position between the two needs to be proofread, the structure is complex and the triggering sensitivity is low. The other type is to set all the sensing components on the water tank, which can be conducive to setting the sensing matching position between the sensing components, and the corresponding waterproof structure needs to be installed to solve the wading problem. However, if the sensing component fails, the entire water tank needs to be replaced, resulting in high manufacturing and maintenance costs of the water tank, which is not conducive to market application.

[0005] Therefore, the water level sensing mechanism provided on the dishwasher with a built-in water tank needs to be improved, which is a research problem for dishwasher manufacturers at present. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide a dishwasher, which improves the water level sensing mechanism on the dishwasher with a built-in water tank, so as to improve the triggering sensitivity between the sensing components and allow the water level sensing mechanism to be set separately, which is convenient for installation or replacement, and is conducive to reducing the manufacturing cost of the built-in water tank.

[0007] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a dishwasher, including an inner tank, a water storage container is provided on the inner tank, a top cover and a water adding tray are provided on the top of the water storage container, a water inlet is provided on the top cover, and the water adding tray is provided with a diversion port connected to the water inlet; a diversion cover is provided on the water adding tray, and the diversion cover is provided with a water level sensing mechanism for detecting the water storage amount of the water storage container, the water level sensing mechanism includes a float and a conduit connected to the bottom of the diversion cover, the conduit passes through the water inlet and is inserted into the water storage container; a sensing element is provided on the float, the float is arranged in the conduit, and can move up and down in the conduit with the change of water level; the diversion cover is provided with an induction trigger device for sensing the position change of the float and generating a trigger signal when the sensing element on the float approaches.

[0008] The dishwasher provided by the present application has the beneficial effect that, compared with the prior art, the inner tank of the dishwasher is provided with a water storage capacity for storing water, and a diversion cover is provided on the water adding tray and the top cover of the built-in water storage container, and the water adding tray is connected with the top cover so that the diversion cover can be placed at the top position of the water storage container. The diversion cover is provided with a water level sensing mechanism, including a float and a conduit, the conduit can be inserted into the water storage container, the float is accommodated in the conduit, and moves up and down in the conduit with the change of the water level. The diversion cover is also provided with an induction trigger device, which cooperates with the position of the induction member on the float to realize the induction trigger of the water adding water level. First, the water level sensing mechanism is arranged on the diversion cover which is arranged separately, which can be convenient for installation and replacement, and can effectively reduce the manufacturing and maintenance costs compared with the arrangement on the built-in water tank, and can also be convenient for setting the induction matching position between the induction member on the float and the induction trigger device on the diversion cover, without the need for secondary calibration, and effectively improves the trigger sensitivity and installation efficiency. Secondly, the induction trigger device is arranged separately on the diversion cover and can be isolated from the water storage, which is conducive to reducing the risk of wading.

[0009] The water level sensing mechanism is improved, the conduit is a cylindrical through-tube extending toward the bottom of the water storage container, the float is a cylinder accommodated in the conduit; the conduit is provided with a vertically arranged limit groove, and the float is provided with a slider engaged with the limit groove. On the one hand, by utilizing the cylindrical structural characteristics, the conduit and the float are both provided as a cylindrical through-tube and a cylindrical structure that cooperate with each other, which is conducive to improving the mobility of the float in the conduit, effectively improving the smoothness of the float's up and down displacement movement in the conduit, and ensuring the induction triggering effect. On the other hand, in order to control the range of movement of the float, a mutually cooperating limit structure is set. The limit structure is preferably a vertical limit groove arranged on the conduit and a slider on the float. Through the engagement of the slider with the limit groove, the displacement range of the float can be limited and the float can be prevented from escaping from the conduit; moreover, the float can be simultaneously limited to not rotate horizontally but can only move up and down in the conduit, which is conducive to the accurate alignment of the sensing element on the float and the sensing trigger device on the guide cover, ensuring that the distance of the sensing matching position will not change, thereby improving the stability of water level sensing.

[0010] Optionally, the conduit is further provided with a guide groove, the outer periphery of the float is provided with a protrusion that engages with the guide groove, and the induction element is arranged in the protrusion; the deflector cover is provided with a mounting seat for mounting the induction trigger device, and the mounting seat matches the position of the guide groove of the conduit. It is preferred that the top of the guide groove is accurately aligned with the mounting seat, so that when the float floats to the highest limit, the induction element arranged on the protrusion of the float and the induction trigger device arranged on the mounting seat sense each other and generate a trigger signal to remind the user that the water in the water storage container is full, so that the water adding operation is stopped in time, and the water adding amount is effectively controlled.

[0011] Optionally, a stopper for limiting the upward position of the protrusion is provided at the upper end of the guide groove of the conduit; a lower opening is provided at the bottom of the float, and a pressure chamber for storing gas is provided in the float, and the pressure chamber is connected to the lower opening. In order to sense the maximum water level value to remind the user to control the amount of water added, the water level sensing device in the prior art dishwasher generally sets the float to have an overall density less than that of water and a structure with a magnetic sensor integrated inside. According to the volume and overall weight of the float itself, the floating or sinking of the float is controlled, and the overall density of the float is required to be relatively high. Moreover, due to the high overall density of the float, the water level that supports the float is located in the middle and upper part of the float, so that the induction trigger generated by the alignment of the induction member on the float and the induction trigger device is easily delayed, resulting in the user's delay in stopping the water addition operation when the reminder signal is issued, so that overflow is likely to occur. In view of the technical problem that the induction trigger of the float in the prior art is easily delayed, the present application improves the structure of the float. First, the sensing element on the float is set in the protrusion on the outer periphery of the float, the float has an air pressure cavity inside, and the bottom of the float is provided with a lower opening connected to the air pressure cavity. The structure of the float is changed, so that the float's own density is reduced, which saves consumables and reduces manufacturing costs. Secondly, when the bottom of the float contacts the water, and during the rise and fall of the water level, the air pressure in the air pressure cavity of the float changes, and the changing air pressure causes the float to be lifted by the water and move up and down in the conduit. In actual applications, the float that is displaced by the air pressure change in the air pressure cavity is used to keep the water level that lifts the float at the bottom of the float; and the protrusion on the float is limited by the limit part at the upper end of the guide groove to limit the upward movement height, so as to simultaneously limit the highest point position of the float moving up in the conduit. Therefore, after the float is lifted up by the water, it moves upward, and the sensing element located in the protrusion can reach the highest point position first, and the sensing trigger device cooperating with this position generates a sensing trigger signal, and then generates a reminder signal before the highest water level of the water storage container, promptly reminding the user to stop adding water, effectively playing an early warning role and reducing the risk of overflow.

[0012] Optionally, an isolation gap is provided between the outer wall of the float and the inner wall of the conduit; and a vent connected to the isolation gap is provided at the lower end of the guide groove of the conduit. In practical applications, when a user manually adds water to the built-in water storage container, the water flow will basically cover the entire water adding tray, the internal air pressure of the water storage container increases, and a large number of bubbles will overflow from the water adding tray, which is prone to water backflow and splashing; and the internal air pressure of the water storage container will affect the water adding speed, which prolongs the water adding time. For this reason, an isolation gap is provided between the outer wall of the float and the inner wall of the conduit. The function of the isolation gap, on the one hand, is to provide a movable space between the float and the conduit, so that the float can move up and down normally in the conduit, ensuring the normal operation of the float. On the other hand, the isolation gap also plays a role in balancing the internal and external air pressures of the water storage container, effectively preventing water backflow and splashing, and keeping the water adding flow rate normal, shortening the water adding operation time. In addition, a vent connected to the isolation gap is provided at the lower end of the guide groove of the conduit, which can further increase the ventilation area and improve the air pressure balance effect.

[0013] The installation structure of the deflector cover is improved, the top cover is provided with a fixing seat located on both sides of the water inlet, and the fixing seat is provided with a fixing hole; the deflector cover is provided with a connecting ear that is embedded with the fixing seat, and the connecting ear is provided with a connecting hole that matches the position of the fixing hole; the outer periphery of the water adding tray is provided with a first surrounding edge, the deflector cover is installed on the water adding tray and accommodated in the first surrounding edge; the deflector cover has a water adding port connected to the outside of the dishwasher, and the deflector cover is also provided with a fixing ring arranged around the water adding port, and at least a part of the ring body of the fixing ring protrudes from the edge of the deflector cover and rests on the first surrounding edge of the water adding tray. On the one hand, the deflector cover is installed at the connection between the water adding tray and the top cover, and the connecting ear on the deflector cover is embedded with the fixing seat on the top cover, so that the connecting hole on the connecting ear and the fixing hole on the fixing seat can be aligned with each other at the same time, so as to be fixed by adding fasteners such as screws. On the other hand, a fixing ring is provided on the guide cover around the water inlet, and part of the ring body of the fixing ring protrudes from the edge of the guide cover, so that the guide cover can be placed on the first surrounding edge of the water adding tray using the fixing ring, so that the guide cover can be installed flatly on the top of the water storage container, which is conducive to the water level sensing mechanism on the guide cover to accurately detect the water level height and trigger the reminder signal in time. In addition, the first surrounding edge on the water adding tray can enclose the guide cover to effectively prevent water overflow.

[0014] The filtering structure of the guide cover is improved, the guide cover is provided with a filter disc connected to the fixing ring, the filter disc and the guide cover are integrally formed; the filter disc is provided with a filtering structure, the filtering structure is a plurality of water holes or a plurality of water gaps evenly distributed on the filter disc. In the prior art, the filter element set on the water tank of the dishwasher generally adopts a metal mesh or a nylon mesh, which is integrally injection molded with the cover of the water inlet during production and manufacturing. During injection molding, the metal mesh or the nylon mesh is first placed in the mold cavity. This process makes it more expensive, and there are more defective products during the production process, resulting in increased production and manufacturing costs. The filter disc of the present application is integrally formed with the guide cover, so that the filter disc is a part of the guide cover, which can effectively reduce the manufacturing of defective products and reduce costs. The filtering structure on the filter disc can preferably be a water hole or a water gap evenly distributed on the filter disc, which can filter large particles of impurities in the water of the user's home to achieve the same filtering purpose and effectively reduce the manufacturing cost.

[0015] Optionally, the guide cover is also provided with a water adding cover for covering the water adding port, and a step for raising the water adding cover is provided in the fixing ring; the outer periphery of the filter disc is provided with a surrounding wall portion, and the surrounding wall portion is provided with a plurality of through grooves connected with the steps, and one or more of the plurality of through grooves are connected with the filter structure; the guide cover is provided with a second surrounding edge, and one or more of the plurality of through grooves are connected with the second surrounding edge and extend to the bottom of the second surrounding edge. First, a step is provided in the fixing ring of the guide cover, and the water adding cover is supported by the step so that the water adding cover can be embedded in the water adding port, which makes the surface of the guide cover flat and beautiful, and can be isolated from the filter disc to form a filter cavity. Secondly, since water is easily accumulated on the step, a through groove connected with the step is provided on the surrounding wall portion of the filter disc, and the through groove can play a role in unloading water and drain the accumulated water on the step. Thirdly, the through groove is communicated with the second surrounding edge of the guide cover and extends to the bottom of the second surrounding edge, thereby playing a ventilation role, which is beneficial to improving the air pressure balance effect between the water storage container and the outside of the dishwasher.

[0016] Optionally, the water adding cover is provided with a handle slot for inserting fingers, and the handle slot is provided with a handle; the bottom of the filter plate is provided with an arc-shaped groove for avoiding the handle slot. In order to cooperate with the embedded installation structure of the water adding cover, a handle slot is provided on the water adding cover, and a handle is provided on the handle slot to facilitate manual lifting, effectively improve the accuracy of operation, and enhance the user experience. In addition, the bottom of the filter plate is also provided with an arc-shaped groove, which can not only avoid the handle slot on the water adding cover, but also use the shape characteristics of the arc-shaped groove to concentrate the water added, effectively reduce the splashing of the water, which is beneficial for the user to perform water adding operations and control the amount of water added, thereby improving the user's operating experience.

[0017] The structure of the dishwasher is improved, the inner tank includes a bottom plate and a top plate covering the bottom plate, the bottom plate includes a frame with a rectangular cross-section and an opening on one side, the frame includes three side wall parts respectively connected to the top plate; the inner tank also includes a shell enclosed on the outer periphery of the three side wall parts, the water storage container is connected by cavities arranged between the shell and the three side wall parts; the top cover of the water storage container is connected to the top plate, and the water adding tray extends to the top plate; the guide cover matches the shape of the water adding tray and the top cover, and covers the water inlet of the water adding tray and the top cover.

[0018] First, the water storage container is formed by connecting the surrounding shell on the inner tank with the cavity set between the three side walls of the inner tank, so that the water storage container is integrated on the inner tank of the dishwasher and is integrally formed with the inner tank, effectively utilizing the internal space of the dishwasher. The water storage container integrated on the inner tank can not only increase the water storage capacity, but also effectively reduce the overall appearance size of the dishwasher, which can effectively reduce the number of molds and reduce the mold opening cost. Moreover, the structure of the water storage container integrated on the inner tank makes the water storage container close to the inner tank. When the dishwasher is washing, the water heat in the inner tank can be simultaneously transferred to the water storage container, effectively improving the utilization rate of water heat energy and reducing the energy consumption of the dishwasher.

[0019] Secondly, the water adding tray of the water storage container extends to the top plate of the inner tank, so that the water flow passes through the water adding tray first and then is directed into the water storage container, effectively controlling the water flow rate to facilitate users to control the amount of water added.

[0020] Thirdly, the guide cover matches the shape of the water adding tray and the top cover, so that the top of the inner tank with the integrated water storage container is flat and beautiful; and the guide cover can be completely covered on the water inlet of the water adding tray and the top cover, effectively improving the sealing effect and preventing water overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 Schematic diagram of the three-dimensional structure of the inner tank of the dishwasher provided in the embodiment of the present application Figure 1 ;

[0023] Figure 2 Schematic diagram of the inner tank cross-section structure of the dishwasher provided in the embodiment of the present application Figure 1 ;

[0024] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0025] Figure 4 Schematic diagram of the three-dimensional structure of the guide cover provided in the embodiment of the present application Figure 1 ;

[0026] Figure 5 A schematic diagram of the three-dimensional structure of a float provided in an embodiment of the present application;

[0027] Figure 6 Schematic diagram of the inner tank cross-section structure of the dishwasher provided in the embodiment of the present application Figure 2 ;

[0028] Figure 7 for Figure 6 An enlarged schematic diagram of part C of FIG.

[0029] Figure 8 A schematic diagram of the three-dimensional structure of the top cover of the water storage container provided in an embodiment of the present application;

[0030] Fig. 9 An assembly diagram of the top cover and the guide cover provided in an embodiment of the present application;

[0031] Fig.10 Schematic diagram of the three-dimensional structure of the guide cover provided in the embodiment of the present application Figure 2 ;

[0032] Fig.11 for Figure 2 An enlarged schematic diagram of part B;

[0033] Fig.12 Schematic diagram of the three-dimensional structure of the inner tank of the dishwasher provided in the embodiment of the present application Figure 2 ;

[0034] Fig.13 A schematic diagram of the working process of a dishwasher provided in an embodiment of the present application.

[0035] Among them, the reference numerals in the figure are:

[0036] 100- liner; 200- water storage container;

[0037] 1-top cover; 11-water inlet; 12-fixing seat; 121-fixing hole;

[0038] 2-water adding tray; 21-flow guide port; 22-first surrounding edge;

[0039] 3-flow guide cover; 30-water inlet; 31-induction trigger device; 32-mounting seat; 33-connecting ear; 331-connecting hole; 34-fixing ring; 35-filter plate; 351-enclosing wall; 352-through groove; 353-arc groove; 36-water filling cover; 361-handle groove; 362-handle; 37-step; 38-second surrounding edge;

[0040] 4- float; 40- isolation gap; 41- induction member; 42- slider; 43- protrusion; 44- lower opening; 45- air pressure chamber;

[0041] 5-conduit; 51-limiting groove; 52-guide groove; 521-limiting portion; 522-vent;

[0042] 6- chassis; 61- side wall; 7- top plate; 8- casing. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position 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 specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] Please also read Figures 1 to 3, the dishwasher provided by the embodiment of the present application is now described. The dishwasher comprises an inner tank 100, on which a water storage container 200 is arranged, and a top cover 1 and a water adding tray 2 are arranged on the top of the water storage container 200, and a water inlet 11 is arranged on the top cover 1, and the water adding tray 2 is provided with a diversion port 21 connected to the water inlet 11; a diversion cover 3 is arranged on the water adding tray 2, and the diversion cover 3 is provided with a water level sensing mechanism for detecting the water storage amount of the water storage container 200, and the water level sensing mechanism comprises a float 4 and a conduit 5 connected to the bottom of the diversion cover 3, and the conduit 5 passes through the water inlet 11 and is inserted into the water storage container 200; a sensing element 41 is arranged on the float 4, and the float 4 is arranged in the conduit 5 and can move up and down in the conduit 5 with the change of the water level; a sensing trigger device 31 is arranged on the diversion cover 3 for sensing the position change of the float 4 and generating a trigger signal when the sensing element 41 on the float 4 approaches.

[0048] Compared with the prior art, the dishwasher provided by the present application has a water storage capacity for storing water on the inner tank of the dishwasher, and a diversion cover 3 is arranged on the water adding tray 2 and the top cover 1 of the built-in water storage container 200, and the water adding tray 2 is connected with the top cover 1 so that the diversion cover 3 can be placed at the top position of the water storage container 200. The diversion cover 3 is provided with a water level sensing mechanism, including a float 4 and a conduit 5, and the conduit 5 can be inserted into the water storage container 200. The float 4 is accommodated in the conduit 5 and moves up and down in the conduit 5 with the change of the water level. The diversion cover 3 is also provided with an induction trigger device 31, which cooperates with the position of the induction member 41 on the float 4 to realize the induction triggering of the water adding water level. First, the water level sensing mechanism is arranged on the separately arranged diversion cover 3, which is convenient for installation and replacement, and can effectively reduce the manufacturing and maintenance costs compared with the arrangement on the built-in water tank. Secondly, it is convenient to set the induction matching position between the induction member 41 on the float 4 and the induction trigger device 31 on the diversion cover 3, without the need for secondary calibration, which effectively improves the trigger sensitivity and installation efficiency. Thirdly, the induction trigger device 31 is separately arranged on the guide cover 3 and can be isolated from the water storage, which is beneficial to reducing the risk of wading.

[0049] In another embodiment of the present application, the water level sensing mechanism is optimized. Please refer to Figure 3 , Figure 4 and Figure 5 The conduit 5 is a cylindrical through-tube extending toward the bottom of the water storage container 200, and the float 4 is a cylinder received in the conduit 5. By utilizing the cylindrical structural characteristics, the conduit 5 and the float 4 are both configured as mutually matching cylindrical through-tube and cylindrical structures, which is beneficial to improving the mobility of the float 4 in the conduit 5, effectively improving the smoothness of the up-and-down displacement movement of the float 4 in the conduit 5, and ensuring the induction triggering effect.

[0050] On the basis of the above, in order to control the range of movement of the float 4, a mutually coordinated limit structure is set. Please refer to Figure 4 and Figure 5 The limiting structure is that the conduit 5 is provided with a vertical limiting groove 51, and the float 4 is provided with a slider 42 that is engaged with the limiting groove 51. The engagement of the slider 42 with the limiting groove 51 can limit the displacement range of the float 4 and prevent the float 4 from escaping from the conduit 5; moreover, the float 4 can be limited to not rotate horizontally but only move up and down in the conduit, which is conducive to accurate alignment of the sensing element 41 on the float 4 and the sensing trigger device 31 on the guide cover 3, ensuring that the distance of the sensing matching position will not change, and improving the stability of water level sensing.

[0051] In another embodiment of the present application, please refer to Figure 3 , Figure 4 and Figure 5 The conduit 5 is also provided with a guide groove 52, and the outer periphery of the float 4 is provided with a protrusion 43 that is engaged with the guide groove 52, and the induction element 41 is arranged in the protrusion 43; the deflector cover 3 is provided with a mounting seat 32 for mounting the induction trigger device 31, and the mounting seat 32 is matched with the guide groove 52 of the conduit 5. It is preferred that the top of the guide groove 52 is accurately aligned with the mounting seat 32, so that when the float 4 floats to the highest limit, the induction element 41 arranged on the protrusion 43 of the float 4 and the induction trigger device 31 arranged on the mounting seat 32 sense each other and generate a trigger signal. Among them, the induction trigger device 31 can be a Hall or a reed switch, and the induction element 41 on the float 4 can preferably be a magnet. The induction trigger device 31 can transmit the generated trigger signal to the main control board of the dishwasher. The control circuit of the main control board makes a reminder alarm according to the received trigger signal. The alarm can be in the form of a buzzer or a warning message on the control display screen, or both methods are performed simultaneously to remind the user that the water in the water storage container 200 is full, so as to stop the water adding operation in time and effectively control the water adding amount.

[0052] In order to sense the maximum water level value to remind the user to control the amount of water added, the water level sensing device in the prior art dishwasher generally sets the float 4 to have an overall density less than that of water and a structure with a magnetic sensor integrated inside. The floating or sinking of the float 4 is controlled according to the volume and overall weight of the float 4, which requires a high overall density of the float 4. Moreover, due to the high overall density of the float 4, the water level that supports the float 4 is located in the middle and upper part of the float 4, so that the induction trigger generated by the alignment of the sensing element 41 on the float 4 and the induction trigger device 31 is easily delayed, resulting in the user being slow to stop adding water when the reminder signal is issued, which can easily cause overflow. In view of the technical problem of the easy delay of the induction trigger of the float 4 in the prior art, in another embodiment of the present application, the present application optimizes the structure of the float 4, please refer to Figure 3 A stopper 521 for limiting the upward movement of the protrusion 43 is provided at the upper end of the guide groove 52 of the conduit 5; a lower opening 44 is provided at the bottom of the float 4, and a pressure chamber 45 for storing gas is provided inside the float 4, and the pressure chamber 45 is communicated with the lower opening 44.

[0053] First, the induction element 41 on the float 4 is arranged in the protrusion 43 on the outer periphery of the float 4, the float 4 has an air pressure cavity 45 inside, and the bottom of the float 4 is provided with a lower opening 44 connected to the air pressure cavity 45. The structure of the float 4 is changed, so that the density of the float 4 itself is reduced, which saves consumables and reduces the manufacturing cost.

[0054] Secondly, when the bottom of the float 4 contacts the water, and in the process of the water level rising and falling, the air pressure in the air pressure chamber 45 of the float 4 changes, and the changing air pressure causes the float 4 to be lifted up by the water and move up and down in the conduit 5. In practical applications, the float 4 that is displaced by the air pressure change in the air pressure chamber 45 is maintained at the lower part of the float 4 by the water level change of the air pressure chamber 45; and the protrusion 43 on the float 4 is limited in the upward movement height by the limiter 521 at the upper end of the guide groove 52, so as to simultaneously limit the highest point position of the float 4 in the conduit 5. Therefore, after the float 4 is lifted up by the water and moves upward, the induction element 41 located in the protrusion 43 can preferentially reach the highest point position, and the induction trigger device 31 coordinated with the position generates an induction trigger signal, and then generates a reminder signal before the highest water level of the water storage container 200, timely reminding the user to stop the water addition operation, effectively playing an early warning role and reducing the risk of overflow.

[0055] In actual application, when the user manually adds water to the built-in water storage container 200, the water flow will basically cover the entire water adding tray 2, the internal air pressure of the water storage container 200 increases, and a large number of bubbles will overflow from the water adding tray 2, which is prone to water backflow and splashing; moreover, the internal air pressure of the water storage container 200 will affect the water adding speed, which will prolong the water adding time. For this reason, in another embodiment of the present application, please refer to Figure 3 , an isolation gap 40 is provided between the outer wall of the float 4 and the inner wall of the conduit 5. The isolation gap 40 can preferably be set to be greater than 0.25 mm. The isolation gap 40 provided between the outer wall of the float 4 and the inner wall of the conduit 5 has the following functions: on the one hand, it allows a movable space between the float 4 and the conduit 5, so that the float 4 can move up and down normally in the conduit 5, ensuring the normal operation of the float 4. On the other hand, the isolation gap 40 also serves to balance the internal and external air pressures of the water storage container 200, effectively preventing water from backflowing and splashing, and keeping the water addition flow rate normal, thereby shortening the water addition operation time.

[0056] Based on the above, please refer to Figure 4 The lower end of the guide groove 52 of the conduit 5 is provided with a vent 522 connected to the isolation gap 40, which can further increase the ventilation area and improve the air pressure balance effect.

[0057] Please also read Figure 2 , Figure 3 , Figure 6 and Figure 7 , the working principle of the water level sensing mechanism of this application:

[0058] The float 4 is arranged inside the conduit 5. When the float 4 moves upward, the highest point of the upward movement is limited by the protrusion 43 and the stopper 521 of the guide groove 52; when the float 4 moves downward, the lowest point of the downward movement is limited by the slider 42 and the lower end of the limit groove 51. The float 4 is confined inside the conduit 5 and moves up and down within the set range of the above structure. When the user adds water, the rising water level pushes the float 4 to move upward in the conduit 5. When the float 4 rises to a relative position with the induction trigger device 31, it is triggered. The induction trigger device 31 transmits a signal to the main control board of the dishwasher. The main control board responds and feeds back an alarm signal or a signal that the water is full, reminding the user to stop the water adding operation in time.

[0059] In another embodiment of the present application, the installation structure of the guide cover 3 is optimized. Please refer to Figure 8 , Fig. 9 and Fig.10The top cover 1 is provided with fixing seats 12 located on both sides of the water inlet 11, and the fixing seats 12 are provided with fixing holes 121; the guide cover 3 is provided with connecting ears 33 embedded with the fixing seats 12, and the connecting ears 33 are provided with connecting holes 331 that match the positions of the fixing holes 121; the outer periphery of the water adding tray 2 is provided with a first surrounding edge 22, and the guide cover 3 is installed on the water adding tray 2 and accommodated in the first surrounding edge 22; the guide cover 3 has a water adding port 30 connected to the outside of the dishwasher, and the guide cover 3 is also provided with a fixing ring 34 arranged around the water adding port 30, and at least a part of the ring body of the fixing ring 34 protrudes from the edge of the guide cover 3 and is placed on the first surrounding edge 22 of the water adding tray 2. On the one hand, the guide cover 3 is installed at the connection between the water adding tray 2 and the top cover 1, and the connecting ear 33 on the guide cover 3 is embedded with the fixing seat 12 on the top cover 1, so that the connecting hole 331 on the connecting ear 33 and the fixing hole 121 on the fixing seat 12 can be aligned with each other, so as to fix them with fasteners such as screws. On the other hand, a fixing ring 34 is provided on the guide cover 3 around the water adding port 30, and part of the ring body of the fixing ring 34 protrudes from the edge of the guide cover 3, so that the guide cover 3 can be placed on the first surrounding edge 22 of the water adding tray 2 by using the fixing ring 34, so that the guide cover 3 can be installed flatly on the top of the water storage container 200, which is conducive to the water level sensing mechanism on the guide cover 3 to accurately detect the water level height and trigger the reminder signal in time. In addition, the first surrounding edge 22 on the water adding tray 2 can enclose the guide cover 3 to effectively prevent water overflow.

[0060] In the prior art, the filter element provided on the water tank of the dishwasher generally adopts a metal mesh or a nylon mesh, which is integrally molded with the cover of the water inlet 30 during production. During the injection molding, the metal mesh or the nylon mesh is first placed in the mold cavity. This process makes it more expensive, and there are more defective products during the production process, resulting in increased production costs. In another embodiment of the present application, the filter structure of the guide cover 3 is optimized, please refer to Fig.10 , the deflector cover 3 is provided with a filter disc 35 connected to the fixing ring 34, and the filter disc 35 is integrally formed with the deflector cover 3, so that the filter disc 35 is a part of the deflector cover 3, which can effectively reduce the manufacturing of defective products and reduce costs. The filter disc 35 is provided with a filtering structure, and the filtering structure is a plurality of water holes or a plurality of water gaps evenly distributed on the filter disc 35. The filtering structure on the filter disc 35 can preferably be water holes or water gaps evenly distributed on the filter disc 35, which can filter large particles of impurities in the water of the user's home to achieve the same filtering purpose and effectively reduce the manufacturing cost. The width of the water gap is 0.2-1.5 mm, or preferably 0.3 to 0.7 mm, and the length of the water gap is not limited.

[0061] In another embodiment of the present application, please refer to Fig. 9, Fig.10 and Fig.11 The guide cover 3 is also provided with a water adding cover 36 for covering the water adding port 30, and the fixing ring 34 is provided with a step 37 for supporting the water adding cover 36. The step 37 is used to support the water adding cover 36, so that the water adding cover 36 can be embedded in the water adding port 30, so that the surface of the guide cover 3 is flat and beautiful, and can be isolated from the filter disc 35 to form a filter cavity.

[0062] Since water is easily accumulated on the step 37, the structure of the guide cover 3 is optimized. Fig.10 and Fig.11 The filter disc 35 is provided with a surrounding wall portion 351 on its outer periphery, and a plurality of through grooves 352 communicating with the step 37 are provided on the surrounding wall portion 351, and one or more of the plurality of through grooves 352 are communicated with the filter structure, and the through grooves 352 can be utilized to unload water and drain the accumulated water on the step 37.

[0063] Please also refer to Figure 4 , Fig.10 and Fig.11 The guide cover 3 is provided with a second peripheral edge 38, and one or more of the plurality of through grooves 352 are connected to the second peripheral edge 38 and extend to the bottom of the second peripheral edge 38. The through grooves 352 also play a ventilating role, which is conducive to improving the air pressure balance effect between the water storage container 200 and the outside of the dishwasher.

[0064] In order to cooperate with the embedded installation structure of the water filling cover 36, in another embodiment of the present application, please refer to Fig. 9 and Fig.11 The water filling cover 36 is provided with a handle groove 361 for inserting fingers, and the handle groove 361 is provided with a handle 362 to facilitate lifting by hand, effectively improve the operation accuracy and enhance the user experience.

[0065] Based on the above, please refer to Fig.11 The bottom of the filter plate 35 is provided with an arc-shaped groove 353 for avoiding the handle groove 361. The arc-shaped groove 353 can not only avoid the handle groove 361 on the water filling cover 36, but also use the shape characteristics of the arc-shaped groove 353 to concentrate the water added, effectively reduce the splashing of the water, facilitate the user to perform the water adding operation and control the water adding amount, and improve the user's operating experience.

[0066] In another embodiment of the present application, the structure of the dishwasher is optimized. Please refer to Figure 1 and Fig.12The inner tank 100 includes a bottom plate 6 and a top plate 7 covering the bottom plate 6, the bottom plate 6 includes a frame with a rectangular cross-section and an opening on one side, the frame includes three side wall portions 61 respectively connected to the top plate 7; the inner tank 100 also includes a shell 8 enclosed on the outer periphery of the three side wall portions 61, and the water storage container 200 is formed by connecting the shell 8 and the three side wall portions 61 with cavities spaced apart; the top cover 1 of the water storage container 200 is connected to the top plate 7, and the water adding tray 2 extends to the top plate 7; the guide cover 3 matches the shape of the water adding tray 2 and the top cover 1, and covers the water adding tray 2 and the water inlet 11.

[0067] First, the water storage container 200 is formed by connecting the surrounding shell 8 on the inner tank 100 with the cavity spaced between the three side wall portions 61 of the inner tank 100, so that the water storage container 200 is integrated with the inner tank 100 of the dishwasher and is integrally formed with the inner tank 100, effectively utilizing the internal space of the dishwasher. The water storage container 200 integrated with the inner tank 100 can not only increase the water storage capacity, but also effectively reduce the overall appearance size of the dishwasher, which can effectively reduce the number of molds and reduce the mold opening cost. Moreover, the structure of the water storage container 200 integrated with the inner tank 100 makes the water storage container 200 close to the inner tank 100. When the dishwasher is washing, the water heat in the inner tank 100 can be simultaneously conducted to the water storage container 200, effectively improving the utilization rate of water heat energy and reducing the energy consumption of the dishwasher.

[0068] Secondly, the water adding tray 2 of the water storage container 200 is extended to the top plate 7 of the inner tank 100, so that the water flow first passes through the water adding tray 2 and then is directed into the water storage container 200, effectively controlling the water flow rate to facilitate the user to control the amount of water added.

[0069] Thirdly, the guide cover 3 matches the shape of the water adding tray 2 and the top cover 1, so that the top of the inner tank 100 integrated with the water storage container 200 is flat and beautiful; and the guide cover 3 can be completely covered on the water adding tray 2 and the water inlet 11 of the top cover 1, effectively improving the sealing effect and preventing water overflow.

[0070] See also Fig.13 , the working principle of the dishwasher provided in the embodiment of the present application:

[0071] First of all, the dishwasher has two water inlet modes: ① water tank inlet and ② tap water inlet, and ① and ② water inlet function modes exist at the same time. The water inlet method is as follows:

[0072] ① Path: tap water - water inlet valve - water pipe - flow meter - water inlet anti-siphon - water pipe - water softener - water pipe - washing chamber. The dishwasher directly cleans the dishes and the water does not pass through the water tank for storage. In this scenario, the water tank is only used as a backup function.

[0073] ② Path: The water tank uses a manual water inlet 30. When it is inconvenient for the user to connect the tap or the tap water is cut off, water is manually added to the water tank through the water inlet 30 and filled. When the machine washes the dishes, the washing water is obtained through the water tank: water tank-water pump-water pipe-flow meter-water inlet anti-siphon-water pipe-water softener-water pipe-washing chamber;

[0074] Among them, the water softener and the corresponding water pipe are optional and can be selected according to different needs of use. That is to say, the water softener and the matching water pipe are not necessary in this path, but this configuration is required.

[0075] Secondly, the control methods of the two water inlet modes of the above dishwasher, ① water tank water inlet and ② tap water water inlet, are as follows:

[0076] When the user selects a washing program and presses the start button:

[0077] 1. T is assigned a value of 1 (T value indicates the number of path selections after water inflow failure)

[0078] 2. Start the water inlet valve water inlet mode;

[0079] 3. Determine whether the flow meter sends a total pulse value greater than the set minimum pulse value to the main control board control circuit within the set time;

[0080] 4. If it is greater than the minimum total pulse value, it is determined that the tap water inflow is normal, and the water inflow continues in method ① until the pulse value fed back by the flow meter corresponding to the single water inflow value set for the washing program selected by the user is completed;

[0081] 5. Stop the water supply, spray the dishes, and record the water inlet path A (the current recorded water inlet path A is ①).

[0082] 6. When the flow meter in step 2 does not send a total pulse value greater than the set minimum pulse value to the main control board control circuit within the set time;

[0083] 7. If the total pulse value is less than the minimum value, it is determined that the tap water inlet has failed, and the water inlet is started according to method ②, and the water pump is turned on to extract the cleaning water in the water tank; and T = T + 1

[0084] 8. Determine whether the flow meter sends a total pulse value greater than the set minimum pulse value to the main control board control circuit within the set time;

[0085] 9. If it is greater than the minimum total pulse value, it is determined that there is washing water in the water tank and the water filling of the water tank is normal. Continue to fill the water in the manner ② until the pulse value fed back by the flow meter corresponding to the single water filling value set for the washing program selected by the user is completed;

[0086] 10. Stop the water supply, spray the dishes and record the water supply path A (the current recorded water supply path A is ②). And reset the T value, T = 1

[0087] Among them: the number of water intakes for each user's washing program is different, with the difference being 2 times of water intake, 3 times of water intake, or 4 times of water intake. That is, to complete a washing program selected by a user, water will be replenished multiple times in the middle.

[0088] 11. When a user program is running halfway and needs to fill the washing chamber with water N+1 times, the recorded water inlet path A value is selected first for water filling;

[0089] 12. Determine whether the flow meter sends a total pulse value greater than the set minimum pulse value to the main control board control circuit within the set time;

[0090] 13. If it is greater than the minimum total pulse value, it is determined that the water inflow is normal under the current situation, and the water inflow continues in the manner of (current path A value) until the pulse value fed back by the flow meter corresponding to the single water inflow value set for the washing program selected by the user is completed;

[0091] 14. If it is less than the minimum pulse total value, it is determined that the water inlet fails in the current situation, then switch to another water inlet path of the current path and assign a value to the current path A, and T=T+1 (if the current water inlet path is ②, then switch to ①, and reassign the current path to A)

[0092] 15. Determine whether the flow meter sends a total pulse value greater than the set minimum pulse value to the main control board control circuit within the set time;

[0093] 16. If it is greater than 3, water will be added until it is completed. If it is less than 3, return to step 14. When the T value is greater than 3, an alarm message will be prompted to feedback water shortage.

[0094] The above method makes it possible for tap water to enter without passing through the built-in water tank, effectively shortening the water intake time, so that the machine can be operated in a shorter time, and the water jet can clean the dishes. The machine as a whole is sensitive and responsive, which improves the user experience and increases the user's desire to buy.

[0095] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A dishwasher, comprising an inner tank, characterized in that: The inner tank is provided with a water storage container, the top of the water storage container is provided with a top cover and a water adding tray, the top cover is provided with a water inlet, and the water adding tray is provided with a diversion port connected with the water inlet; the water adding tray is provided with a diversion cover, the diversion cover is installed at the connection between the water adding tray and the top cover, the diversion cover is provided with a water level sensing mechanism for detecting the water storage amount of the water storage container, the water level sensing mechanism includes a float and a conduit connected to the bottom of the diversion cover, the conduit passes through the water inlet and is inserted into the water storage container; the float is provided with a sensing element, the float is arranged in the conduit, and can move up and down in the conduit with the change of water level; the diversion cover is provided with an induction trigger device for sensing the position change of the float and generating a trigger signal when the sensing element on the float approaches; The conduit is a cylindrical through pipe extending toward the bottom of the water storage container, the float is a cylinder accommodated in the conduit, and the top of the float can extend from the top of the conduit; The conduit is also provided with a guide groove, the outer periphery of the float is provided with a protrusion engaged with the guide groove, and the sensing element is arranged in the protrusion; the guide cover is provided with a mounting seat for mounting the sensing trigger device, and the mounting seat is matched with the guide groove of the conduit; A stopper for limiting the upward movement of the protrusion is provided at the upper end of the guide groove of the conduit; a lower opening is provided at the bottom of the float, and an air pressure chamber for storing gas is provided inside the float, and the air pressure chamber is communicated with the lower opening.

2. The dishwasher according to claim 1, characterized in that The conduit is provided with a vertically arranged limiting groove, and the float is provided with a sliding block embedded in the limiting groove.

3. The dishwasher according to claim 1, characterized in that An isolation gap is arranged between the outer wall of the float and the inner wall of the conduit; and a vent communicated with the isolation gap is arranged at the lower end of the guide groove of the conduit.

4. The dishwasher according to claim 1, characterized in that The top cover is provided with fixing seats located on both sides of the water inlet, and the fixing seats are provided with fixing holes; the deflector cover is provided with connecting ears embedded with the fixing seats, and the connecting ears are provided with connecting holes matched with the positions of the fixing holes; the outer periphery of the water adding tray is provided with a first surrounding edge, and the deflector cover is installed on the water adding tray and accommodated in the first surrounding edge; the deflector cover has a water adding port connected to the outside of the dishwasher, and the deflector cover is also provided with a fixing ring arranged around the water adding port, and at least a part of the ring body of the fixing ring protrudes from the edge of the deflector cover and is placed on the first surrounding edge of the water adding tray.

5. The dishwasher according to claim 4, characterized in that: The guide cover is provided with a filter disc connected to the fixing ring, and the filter disc and the guide cover are integrally formed; the filter disc is provided with a filter structure, and the filter structure is a plurality of water holes or a plurality of water gaps uniformly distributed on the filter disc.

6. The dishwasher according to claim 5, characterized in that The guide cover is also provided with a water adding cover for covering the water adding port, and a step for raising the water adding cover is provided in the fixing ring; a surrounding wall portion is provided on the outer periphery of the filter disc, and a plurality of through grooves connected to the steps are provided on the surrounding wall portion, and one or more of the plurality of through grooves are connected to the filter structure; a second surrounding edge is provided on the guide cover, and one or more of the plurality of through grooves are connected to the second surrounding edge and extend to the bottom of the second surrounding edge.

7. The dishwasher according to claim 5, characterized in that The water filling cover is provided with a handle groove for inserting fingers of a person, and the handle groove is provided with a handle; the bottom of the filter plate is provided with an arc-shaped groove for avoiding the handle groove.

8. The dishwasher according to any one of claims 1 to 7, characterized in that The inner tank includes a bottom plate and a top plate covering the bottom plate, the bottom plate includes a frame with a rectangular cross-section and an opening on one side, the frame includes three side wall portions respectively connected to the top plate; the inner tank also includes a shell enclosed on the outer periphery of the three side wall portions, the water storage container is connected by cavities spaced apart between the shell and the three side wall portions; the top cover of the water storage container is connected to the top plate, and the water adding tray extends to the top plate; the guide cover matches the shape of the water adding tray and the top cover, and covers the water inlet of the water adding tray and the top cover.

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