Household appliance and self-cleaning method thereof

Abstract

The invention relates to a household appliance and a self-cleaning method thereof, and the household appliance comprises a box body which is internally provided with an inner cavity, and the bottom of the inner cavity is provided with a water outlet; the water inlet end of the circulating pump is communicated with the water outlet, and the water outlet end is connected with the first pipeline and the second pipeline; a nozzle is arranged at the other end of the first pipeline; the clean water box is connected with the inner cavity through a water inlet pipeline; the water pump is arranged on the water inlet pipeline; the controller is in signal connection with the water pump and the circulating pump; the controller can control the water pump to convey clear water into the inner cavity and control the circulating pump to pump water in the inner cavity, the water is sprayed to the inner wall of the inner cavity through the first pipeline and the nozzle, circulating flushing is achieved, and after circulating flushing is finished, the controller can control the circulating pump to pump water in the inner cavity and discharge the water out of the inner cavity through the second pipeline. Therefore, the automatic cleaning function of the inner wall of the inner cavity is achieved, and the problem that the cavity of the household appliance is difficult to clean is intelligently and efficiently solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a household appliance and a self-cleaning method thereof. Background Art

[0002] With the development of science and technology, home appliances such as ovens and dishwashers are becoming more and more popular. As living standards improve, people's performance requirements for home appliances such as ovens and dishwashers are also getting higher and higher.

[0003] At present, in some relevant household appliances, the cleaning methods for oil stains on the inner wall of the cavity of household appliances usually include high-temperature cleaning, steam cleaning, and oxidation self-cleaning. Among them, steam cleaning is an auxiliary cleaning and can only clean light oil stains; oxidation self-cleaning has a short effectiveness and needs to be replaced frequently; and high-temperature cleaning requires strong sealing, but the highest temperature resistance of sealing materials in household appliances such as ovens and dishwashers is only 280°C, and the temperature of the entire cavity of high-temperature self-cleaning is required to be around 450°C. Therefore, high-temperature cleaning cannot usually be used, resulting in difficulty in cleaning the inner wall of the cavity of household appliances. Summary of the invention

[0004] The object of the present invention is to provide a household appliance and a self-cleaning method thereof, so as to optimize the cleaning structure of the household appliance in the related art and intelligently and efficiently solve the problem that the cavity of the household appliance is difficult to clean.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, the present invention provides a household appliance, which comprises: a housing, which forms an outer shell of the household appliance; an inner cavity is provided in the housing, and a drain outlet is provided at the bottom of the inner cavity; a circulating pump, whose water inlet end is connected to the drain outlet, and whose water outlet end is respectively connected to a first pipeline and a second pipeline; a nozzle is provided at one end of the first pipeline away from the circulating pump, and the nozzle is connected to the inner cavity; a clean water box, which is used to store clean water, and the clean water box is connected to the inner cavity through a water inlet pipeline, and a water pump is provided on the water inlet pipeline; a controller, which is respectively connected to the water pump and the circulating pump by signal; Among them, the controller can control the water pump to transport the clean water in the clean water box into the inner cavity; and the controller can control the circulation pump to extract the liquid in the inner cavity through the drain port, and control the first pipeline to open and the second pipeline to close, and spray to the inner wall of the inner cavity through the first pipeline and the nozzle to circulate and flush the inner wall of the inner cavity; after the circulation flushing is completed, the controller can control the circulation pump to extract the liquid in the inner cavity through the drain port, and control the first pipeline to close and the second pipeline to open, and discharge the liquid from the inner cavity through the second pipeline.

[0007] According to another aspect of the present invention, the present invention also provides a self-cleaning method for a household appliance, which adopts the above-mentioned household appliance; the self-cleaning method includes: S1: receiving a self-cleaning instruction; S2: controlling a water pump to transport clean water into the inner cavity; S3: controlling a circulating pump to extract liquid in the inner cavity, and controlling the first pipeline to open and the second pipeline to close, and spraying the liquid in the inner cavity onto the inner wall of the inner cavity through the first pipeline and the nozzle to circulate and flush the inner wall of the inner cavity; S4: after the circulated flushing is completed, controlling the circulating pump to extract liquid in the inner cavity, and controlling the first pipeline to close and the second pipeline to open, and transporting the extracted liquid into the sewage box through the second pipeline.

[0008] The embodiments of the present invention have the following positive effects: in the household appliance of the embodiments of the present invention, an inner cavity is provided in the casing, and a drain outlet is provided at the bottom of the inner cavity; clean water is transported into the inner cavity by cooperation of a clean water box and a water pump, and liquid in the inner cavity is extracted through the drain outlet by a circulating pump, and sprayed toward the inner wall of the inner cavity through a first pipeline and a nozzle, so as to circulate and flush the inner wall of the inner cavity; after the circulated flushing is completed, liquid in the inner cavity is extracted through the drain outlet by a circulating pump, and discharged from the inner cavity through a second pipeline; and a controller is used to intelligently control the opening and closing of the water pump, the circulating pump, and the first pipeline and the second pipeline, so as to realize the automatic cleaning function of the inner wall of the inner cavity of the household appliance, and intelligently and efficiently solve the problem that the cavity of the household appliance is difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of a household appliance according to an embodiment of the present invention.

[0010] Figure 2 yes Figure 1 Schematic diagram of some of the internal structures.

[0011] Figure 3 yes Figure 2 Schematic diagram of the structure from another perspective.

[0012] Figure 4 yes Figure 3 A cross-sectional view of .

[0013] Figure 5 yes Figure 3 Schematic diagram of the structure of the water inlet pipeline.

[0014] Figure 6 yes Figure 3 Schematic diagram of the structure of the medium circulation pipeline.

[0015] Figure 7 yes Figure 3 A control schematic diagram.

[0016] Figure 8 yes Figure 4Schematic diagram of the enlarged structure of area A in the middle.

[0017] Fig. 9 yes Figure 4 Schematic diagram of the enlarged structure of area B in the middle.

[0018] Fig.10 yes Fig. 9 Schematic diagram of the structure of the fixed tube and nozzle.

[0019] Fig.11 yes Fig.10 A cross-sectional view of .

[0020] Fig.12 yes Fig.10 Schematic diagram of the nozzle structure.

[0021] Fig.13 yes Fig.12 A schematic structural diagram of another embodiment.

[0022] Fig.14 yes Fig.13 A cross-sectional view of .

[0023] The reference numerals are as follows: 1. box body; 10. inner cavity; 101. assembly groove; 11. liner; 12. door frame; 121. door seal; 122. water collecting tank; 123. drain outlet; 124. filter cover; 13. heat dissipation duct; 131. heat dissipation fan; 132. air guide cover; 14. support top plate; 15. support back plate; 16. heating fan; 2. box door; 31. clean water box; 32. water inlet pipe; 33. water pump; 34. steam generator; 41. Circulation pump; 42. first pipeline; 421. first solenoid valve; 43. second pipeline; 431. second solenoid valve; 44. nozzle; 440. water distribution trough; 441. water distribution tray; 442. water guide column; 443. fixed bracket; 444. supporting rib; 445. water guide rib; 45. sewage box; 46. water collection box; 461. turbidity sensor; 47. drain pipe; 471. water collection tray; 48. fixed pipe; 481. limiting rib; 482. external thread section. DETAILED DESCRIPTION

[0024] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element 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.

[0026] 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, the features defined as "first" and "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.

[0027] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] At present, in some relevant household appliances, the cleaning methods for oil stains on the inner wall of the cavity of household appliances usually include high-temperature cleaning, steam cleaning, and oxidation self-cleaning. Among them, steam cleaning is an auxiliary cleaning and can only clean light oil stains; oxidation self-cleaning has a short effectiveness and needs to be replaced frequently; and high-temperature cleaning requires strong sealing, but the highest temperature resistance of sealing materials in household appliances such as ovens and dishwashers is only 280°C, and the temperature of the entire cavity of high-temperature self-cleaning is required to be around 450°C. Therefore, high-temperature cleaning cannot usually be used, resulting in difficulty in cleaning the inner wall of the cavity of household appliances.

[0029] Figure 1 It is a structural schematic diagram of a household appliance according to an embodiment of the present invention. Figure 2 yes Figure 1 Schematic diagram of some of the internal structures. Figure 3 yes Figure 2 Schematic diagram of the structure from another perspective. Figure 4 yes Figure 3 A cross-sectional view of .

[0030] See also Figures 1 to 4As shown, the household appliance provided by the embodiment of the present invention mainly comprises a housing 1 and a cleaning system arranged in the housing 1. The following takes an oven as an example to describe various structures of the household appliance.

[0031] The box body 1 is configured as a housing of a household appliance, and the box body 1 is a rectangular hollow structure. It should be noted that in other embodiments, the box body 1 may also adopt a housing structure of other shapes, and the specific shape of the box body 1 may be adjusted as required, and is not limited here.

[0032] The box body 1 is provided with an inner cavity 10, which can be used for high-temperature cooking of food by steaming, baking, etc. It should be noted that in other embodiments, the inner cavity 10 can be used as other functional cavities. For example, when the household appliance is a dishwasher, the inner cavity 10 can be used to wash tableware such as bowls and plates. When the household appliance is a disinfection cabinet, the inner cavity 10 can be used to disinfect tableware such as bowls and plates.

[0033] See also Figures 1 to 4 As shown, an inner liner 11 is disposed in the box body 1, and an inner cavity 10 is formed in the inner liner 11. The front end of the inner liner 11 has an opening, and the front end opening of the inner liner 11 is connected to the interior of the inner cavity 10.

[0034] In some embodiments, an opening is provided on the front side wall of the box body 1, and the front side opening of the box body 1 is arranged opposite to the front end opening of the inner cavity 10 of the inner pot 11. Therefore, the food to be cooked can be put into the inner cavity 10 through the front side opening of the box body 1 for high temperature cooking. At the same time, after cooking, the food can be taken out of the inner cavity 10 through the front side opening of the box body 1.

[0035] See also Figure 1 As shown, in some embodiments, a door 2 is provided on the front side of the box body 1. The door 2 is movably arranged on the front side wall of the box body 1, and the door 2 can open and close the front opening of the box body 1, and then open and close the inner cavity 10.

[0036] In some embodiments, the first edge of the door 2 is rotatably connected to the box body 1 , that is, the door 2 is rotatably connected to the box body 1 via its first edge.

[0037] In some embodiments, the first edge of the door 2 is disposed at the bottom end thereof, that is, the bottom end of the door 2 is rotatably connected to the bottom area of ​​the front end of the housing 1 .

[0038] See also Figure 1 and Figure 2As shown, in some embodiments, a door frame 12 is provided on the front side wall of the box body 1, and the box door 2 is rotatably connected to the front side of the door frame 12. The front opening of the box body 1 is opened at the center of the door frame 12, that is, the door frame 12 is arranged around the periphery of the front opening of the box body 1. The front opening of the inner cavity 10 in the inner liner 11 is directly opposite to the center of the door frame 12, and the door frame 12 is arranged around the periphery of the front end opening of the inner liner 11. When the box door 2 is closed, the periphery edge of the box door 2 fits with the front side of the door frame 12, sealing the gap between the box door 2 and the door frame 12, thereby being able to close the inner cavity 10.

[0039] In some embodiments, a door seal 121 is provided around the front opening of the box body 1, and the door seal 121 is provided in the gap between the side of the inner liner 11 and the door frame 12. When the box door 2 is closed, the box door 2 can abut against the door seal 121, sealing the gap between the door frame 12 and the box door 2, thereby sealing the front opening of the box body 1, that is, sealing the front opening of the inner cavity 10.

[0040] See also Figure 3 and Figure 4 As shown, in some embodiments, a heat dissipation duct 13 is provided in the box body 1, and the heat dissipation duct 13 is provided outside the inner liner 11. Specifically, the heat dissipation duct 13 can be provided in a cavity (not shown in the figure) formed between the inner liner 11 and the box body 1. The air inlet end of the heat dissipation duct 13 is connected to the cavity, and the air outlet end of the heat dissipation duct 13 is connected to the outside of the box body 1. At the same time, a heat dissipation fan 131 is provided in the heat dissipation duct 13, and the heat dissipation fan 131 is used to provide wind power, extract air in the cavity, and discharge the heat in the cavity to the outside of the box body 1 through the heat dissipation duct 13, so as to realize the heat dissipation function inside the box body 1.

[0041] In some embodiments, the heat dissipation duct 13 is disposed above the top of the inner liner 11, and the air outlet of the heat dissipation duct 13 faces the front side of the box 1 and is connected to the front space of the box 1. Therefore, the heat dissipation duct 13 can exhaust and dissipate heat from the front side of the box 1.

[0042] In some embodiments, the heat dissipation fan 131 is disposed at the air inlet end of the heat dissipation air duct 13. The heat dissipation fan 131 is a cross-flow fan to increase the wind force at the air inlet end of the heat dissipation air duct 13, improve the efficiency of extracting air in the cavity, and further improve the heat dissipation efficiency in the cavity.

[0043] See also Figure 3 and Figure 4As shown, in some embodiments, a supporting top plate 14 is provided in the box body 1, and the supporting top plate 14 is arranged above the inner liner 11 at intervals. An air guide cover 132 is provided on the top surface of the supporting top plate 14, and the air guide cover 132 and the supporting top plate 14 enclose a heat dissipation air duct 13. At this time, the rear end of the air guide cover 132 serves as the air inlet end of the heat dissipation air duct 13, and the heat dissipation fan 131 is provided at the rear end of the air guide cover 132. The front end of the air guide cover 132 faces the front side of the box body 1 and serves as the air outlet end of the heat dissipation air duct 13.

[0044] In some embodiments, a support back plate 15 is further provided in the box body 1, and the support back plate 15 is provided on the back side of the inner liner 11. The bottom of the support back plate 15 is supported on the bottom plate of the box body 1, and the top of the support back plate 15 is connected to the rear end of the support top plate 14. The front end of the support top plate 14 is fixed on the front wall of the box body 1, so that the support top plate 14 can be stably fixed on the upper side of the inner liner 11.

[0045] In some embodiments, a heating device (not shown in the figure) is provided in the box body 1. The heating device is provided on the rear side wall of the inner tank 11. The heating device is used to heat the air in the inner cavity 10, thereby increasing the temperature inside the inner cavity 10.

[0046] In some embodiments, a heating fan 16 is provided at the rear side wall of the inner cavity 10, and the heating fan 16 is used to generate wind force to transport the hot air generated by the heating device to other areas of the inner cavity 10, thereby allowing the interior of the inner cavity 10 to be evenly heated.

[0047] It should be noted that, in some other embodiments, the heating device may also be disposed on the top wall of the inner cavity 10 to heat the interior of the inner cavity 10 from the top area of ​​the inner cavity 10 .

[0048] Figure 5 yes Figure 3 Schematic diagram of the structure of the water inlet pipeline 32. Figure 6 yes Figure 3 Schematic diagram of the structure of the medium circulation pipeline.

[0049] See also Figures 3 to 6 As shown, the cleaning system is arranged in the box body 1, and the cleaning system is used to realize the self-cleaning function.

[0050] See also Figures 3 to 5As shown, in some embodiments, the cleaning system includes a clean water box 31, a water inlet pipeline 32, a water pump 33 and a steam generator 34. The clean water box 31 is arranged in the box body 1, and the clean water box 31 is used to store clean water, that is, clean water. The first end of the water inlet pipeline 32 is connected to the clean water box 31, and the second end of the water inlet pipeline 32 extends into the inner tank 11, and then is connected to the inner cavity 10. The water pump 33 and the steam generator 34 are both arranged on the water inlet pipeline 32, and the steam generator 34 is arranged downstream of the water pump 33. Therefore, the water pump 33 can pump the clean water in the clean water box 31 into the steam generator 34, heat and vaporize it, and then transport it into the inner cavity 10 through the water inlet pipeline 32, and steam cooking or steam cleaning functions are performed on the inner cavity 10 through steam. At this time, the second end of the water inlet pipeline 32 is used as a steam pipeline.

[0051] It should be noted that, in other embodiments, the steam generator 34 may not work, that is, the steam generator 34 does not heat the water flowing through it, and only transports the clean water in the clean water box 31 into the inner cavity 10 through the water inlet pipe 32 through the water pump 33, so as to provide clean water for the inner cavity 10. In addition, the working temperature of the steam generator 34 can be adjusted, that is, the water in the water inlet pipe 32 is heated by the steam generator 34, and the temperature of the water in the water inlet pipe 32 is adjusted, so that the water inlet pipe 32 can provide clean water of different temperatures for the inner cavity 10.

[0052] It should also be noted that, in some embodiments, the steam generator 34 may not be provided on the water inlet pipe 32 , and the clean water in the clean water box 31 is only transported into the inner cavity 10 through the water inlet pipe 32 by the water pump 33 .

[0053] In some embodiments, the clean water box 31 is fixed above the support top plate 14. The water inlet pipe 32 is arranged on the back side of the inner tank 11 and fixed on the back side of the support back plate 15. The water pump 33 and the steam generator 34 are fixed on the back side of the support back plate 15.

[0054] In some embodiments, the second end of the water inlet pipe 32 passes through the supporting back plate 15 and extends from the rear wall of the inner tank 11 into the inner tank 11 to be arranged.

[0055] See also Figures 3 to 5 As shown, in some embodiments, the cleaning system further includes a circulation pump 41 , a first pipeline 42 , a second pipeline 43 , a nozzle 44 and a sewage box 45 .

[0056] The circulation pump 41 is arranged in the box body 1 and outside the inner tank 11. The circulation pump 41 can be a high-pressure pump. A water collecting tank 122 is provided in the center of the bottom of the inner cavity 10. A drainage port 123 is provided at the bottom of the water collecting tank 122. The water inlet end of the circulation pump 41 is connected to the drainage port 123. The water outlet end of the circulation pump 41 is connected to the first end of the first pipeline 42. The nozzle 44 is provided at the second end of the first pipeline 42, and the nozzle 44 is connected to the inside of the inner cavity 10. Therefore, when the water pump 33 transports the clean water in the clean water box 31 into the inner cavity 10, the clean water can be collected in the water collecting tank 122; then the circulating pump 41 draws the liquid in the water collecting tank 122 through the drain port 123, that is, draws the liquid in the inner cavity 10, and sprays it onto the inner walls of the inner cavity 10 through the first pipeline 42 and the nozzle 44. At the same time, the liquid sprayed onto the inner walls of the inner cavity 10 can flow downward along the wall to the water collecting tank 122, thereby realizing the circulation flushing of the inner wall of the inner cavity 10 and realizing the water cleaning function of the inner cavity 10.

[0057] It should be noted that before performing the cleaning operation, detergent can be pre-placed in the water collection tank 122, and the clean water in the clean water box 31 can be transported into the inner cavity 10 through the water pump 33 to dissolve the detergent and mix the detergent with water; then the mixture of water and detergent in the inner cavity 10 is extracted through the circulation pump 41 to achieve circulating flushing of the inner wall of the inner cavity 10, thereby effectively improving the cleaning effect of the inner cavity 10.

[0058] In some embodiments, the water outlet of the circulation pump 41 is also connected to the first end of the second pipe 43, and the second end of the second pipe 43 is connected to the sewage box 45. Therefore, after the inner wall of the inner cavity 10 is circulated and flushed, the sewage in the inner cavity 10 can be extracted by the circulation pump 41, discharged from the inner cavity 10 through the second pipe 43, and transported to the sewage box 45 for collection.

[0059] It should be noted that, in some other embodiments, the second end of the second pipe 43 may also be connected to the outside of the housing 1. After the inner wall of the inner cavity 10 is circulated and flushed, the sewage in the inner cavity 10 can be extracted by the circulation pump 41, and discharged from the inner cavity 10 through the second pipe 43, and directly discharged outside the housing 1.

[0060] In some embodiments, a first electromagnetic valve 421 is provided at the first end of the first pipeline 42, and the first electromagnetic valve 421 is provided at the connection between the first pipeline 42 and the outlet end of the circulation pump 41. The first electromagnetic valve 421 is used to open and close the first pipeline 42. At the same time, a second electromagnetic valve 431 is provided at the first end of the second pipeline 43, and the second electromagnetic valve 431 is provided at the connection between the second pipeline 43 and the outlet end of the circulation pump 41. The second electromagnetic valve 431 is used to open and close the second pipeline 43.

[0061] Therefore, when the inner wall of the inner cavity 10 needs to be circulated and flushed, the first pipeline 42 can be opened through the first electromagnetic valve 421, and the second pipeline 43 can be closed through the second electromagnetic valve 431, so that the circulation pump 41 can spray the extracted water to each inner wall of the inner cavity 10 through the first pipeline 42 and the nozzle 44. When the sewage in the inner cavity 10 needs to be discharged, the first pipeline 42 can be closed through the first electromagnetic valve 421, and the second pipeline 43 can be opened through the second electromagnetic valve 431, so that the circulation pump 41 can discharge the extracted sewage from the inner cavity 10 through the second pipeline 43.

[0062] It should be noted that, in some other embodiments, an electromagnetic switching valve (not shown in the figure) may be provided at the connection between the outlet end of the circulation pump 41 and the first pipeline 42 and the second pipeline 43. The electromagnetic switching valve is provided with an inlet and two outlets, wherein the inlet of the electromagnetic switching valve is connected to the outlet end of the circulation pump 41, one outlet of the electromagnetic switching valve is connected to the first end of the first pipeline 42, and the other outlet of the electromagnetic switching valve is connected to the first end of the second pipeline 43. Therefore, by switching and controlling the connection between the two outlets and the inlet through the electromagnetic switching valve, the first pipeline 42 can be closed and the second pipeline 43 can be opened, or the first pipeline 42 can be opened and the second pipeline 43 can be closed.

[0063] Figure 7 yes Figure 3 A control schematic diagram.

[0064] See also Figures 3 to 7 As shown, in some embodiments, the cleaning system further includes a controller (not shown in the figure), which is respectively connected to the water pump 33, the steam generator 34, the circulation pump 41, the first solenoid valve 421 and the second solenoid valve 431 by signal. Therefore, the water pump 33 can be controlled by the controller to transport the clean water in the clean water box 31 into the inner cavity 10; the steam generator 34 can also be controlled by the controller to heat the water in the water inlet pipe 32 or to form steam from the water in the water inlet pipe 32, and then transport the hot water or steam into the inner cavity 10; the circulation pump 41 can also be controlled by the controller to extract water from the water collection tank 122; the first solenoid valve 421 and the second solenoid valve 431 can also be controlled by the controller to open or close; finally, the intelligent and efficient cleaning function and cleaning effect of the inner cavity 10 are realized.

[0065] Figure 8 yes Figure 4 Schematic diagram of the enlarged structure of area A in the middle.

[0066] See also Figures 4 to 8As shown, in some embodiments, the cleaning system further includes a water collecting box 46, the bottom of the water collecting tank 122 is connected to the water collecting box 46, and the installation height of the water collecting box 46 is lower than the water collecting tank 122, so that the water in the water collecting tank 122 can automatically flow into the water collecting box 46. At the same time, the water inlet end of the circulation pump 41 is connected to the water collecting box 46, so that the circulation pump 41 can extract the water in the inner cavity 10 through the water collecting box 46.

[0067] In some embodiments, a drain pipe 47 is provided below the bottom of the inner tank 11, and the water collecting box 46 is connected to the bottom of the water collecting tank 122 through the drain pipe 47. Specifically, one end of the drain pipe 47 is connected to the drain port 123 at the bottom of the water collecting tank 122, and the other end of the drain pipe 47 is connected to the inside of the water collecting box 46. Therefore, the water collected in the water collecting tank 122 can be automatically discharged into the water collecting box 46 through the drain pipe 47, and then during the circulation flushing, the circulation pump 41 extracts the water in the water collecting box 46, and the water in the water collecting tank 122 can be automatically replenished into the water collecting box 46, and the water sprayed to the inner wall of the inner cavity 10 through the first pipeline 42 and the nozzle 44 can be automatically collected in the water collecting tank 122, thereby forming a circulation flushing cleaning effect.

[0068] See also Figure 7 and Figure 8 As shown, in some embodiments, the end of the drain pipe 47 connected to the water collection tank 122 is formed with a water receiving tray 471, the water receiving tray 471 is attached to the bottom of the inner tank 11, and the water receiving tray 471 is directly connected to the drain port 123 at the bottom of the water collection tank 122. The water in the water collection tank 122 can enter the water receiving tray 471 through the drain port 123, and then flow into the water collection box 46 through the drain pipe 47.

[0069] See also Figure 2 and Figure 8 As shown, in some embodiments, a filter cover 124 is provided at the bottom of the water collection tank 122, and the filter cover 124 is provided above the drain port 123, and the filter cover 124 is densely covered with filter holes (not shown in the figure). Therefore, the water in the water collection tank 122 can be filtered through the filter holes of the filter cover 124, and then discharged through the drain port 123, and enter the water collection box 46 through the drain pipe 47, so as to prevent debris, particulate matter, etc. from entering the drain pipe 47 and prevent the circulation pump 41 from being blocked.

[0070] See also Figures 4 to 7As shown, in some embodiments, a turbidity sensor 461 is provided in the water collecting box 46, and the turbidity sensor 461 is connected to the controller signal, and the turbidity sensor 461 is used to detect the turbidity value of the water in the water collecting box 46. Since sewage can enter the water collecting box 46 through the bottom of the water collecting tank 122 during the flushing process, the degree of dirt in the inner cavity 10 can be known by detecting the turbidity value of the water in the water collecting box 46, and then the controller can intelligently control the cleaning parameters such as the time and water temperature of the circulating flushing according to the detected turbidity value.

[0071] Fig. 9 yes Figure 4 Schematic diagram of the enlarged structure of area B in the middle. Fig.10 yes Fig. 9 Schematic diagram of the structure of the fixed pipe 48 and the nozzle 44. Fig.11 yes Fig.10 A cross-sectional view of . Fig.12 yes Fig.10 A schematic structural diagram of the middle nozzle 44.

[0072] See also Figures 9 to 12 As shown, in some embodiments, a fixed pipe 48 is provided at the top of the inner cavity 10, and the fixed pipe 48 extends up and down, the top of the fixed pipe 48 is connected to the second end of the first pipeline 42, and the bottom end of the fixed pipe 48 extends into and is fixed in the inner cavity 10. At the same time, a nozzle 44 is provided in the inner cavity 10, and the top of the nozzle 44 is detachably connected to the bottom port of the fixed pipe 48, and the bottom port of the fixed pipe 48 is connected to the inside of the nozzle 44. When the first pipeline 42 is opened and the second pipeline 43 is closed, the circulation pump 41 can extract water in the inner cavity 10, and transport it to the fixed pipe 48 and the nozzle 44 through the first pipeline 42, and then spray the water onto each inner wall of the inner cavity 10 through the bottom port of the nozzle 44, so as to realize the circulation flushing of the inner wall of the inner cavity 10.

[0073] It should be noted that, in other embodiments, the fixing tube 48 and the nozzle 44 may also be disposed on other side walls of the inner cavity 10 .

[0074] In some embodiments, the bottom port of the fixed tube 48 is provided with an internal thread, and the top of the nozzle 44 is provided with an external thread. The nozzle 44 is threadedly connected with the internal thread of the bottom port of the fixed tube 48 through its external thread, so that the top of the nozzle 44 is detachably connected to the bottom port of the fixed tube 48. Therefore, when the inner cavity 10 does not need to be cleaned, the nozzle 44 can be taken out from the inner cavity 10.

[0075] It should be noted that in other embodiments, an external thread may be provided on the outer peripheral wall of the bottom port of the fixed tube 48 , and an internal thread may be provided on the top of the nozzle 44 , and then the top thread of the nozzle 44 may be sleeved on the bottom end of the fixed tube 48 .

[0076] See also Figures 9 to 11As shown, in some embodiments, a limiting rib 481 is convexly provided on the outer peripheral wall of the bottom end of the fixing tube 48, and the limiting rib 481 is annular and arranged around the outer peripheral wall of the bottom end of the fixing tube 48. At the same time, a mounting hole (not shown in the figure) matching with the fixing tube 48 is opened on the top wall of the inner liner 11, and the bottom end of the fixing tube 48 is penetrated through the mounting hole, and the limiting rib 481 is attached to the top wall of the inner liner 11, thereby limiting and fixing the fixing tube 48 on the top wall of the inner liner 11.

[0077] In some embodiments, an external thread section 482 is provided on the outer peripheral wall of the bottom end of the fixing tube 48, and a limiting rib 481 is provided below the external thread section 482. When the bottom end of the fixing tube 48 is inserted into the fixing hole, a nut (not shown in the figure) is sleeved on the fixing tube 48, and the nut is threadedly connected to the external thread section 482, and the nut is located above the top of the inner liner 11. By fixing the nut and the limiting rib 481 on the upper and lower sides of the top wall of the inner liner 11, the fixing tube 48 can be fixedly installed at the installation hole of the top wall of the inner liner 11.

[0078] In some embodiments, an upwardly extending assembly groove 101 is concavely provided on the top surface of the inner cavity 10, and the mounting hole is provided in the assembly groove 101. When the bottom end of the fixing tube 48 is inserted into the mounting hole, the limiting rib 481 can be fitted into the assembly groove 101, and the bottom end surface of the fixing tube 48 is flush with the top surface of the inner cavity 10. Therefore, when the nozzle 44 is taken out of the inner cavity 10, the inner wall of the inner cavity 10 can be kept flat.

[0079] See also Figures 4 to 11 As shown, in some embodiments, the top end of the fixed tube 48 is detachably sealed to the second end of the first pipeline 42. It should be noted that in other embodiments, the top end of the fixed tube 48 can also be integrally connected to the second end of the first pipeline 42.

[0080] See also Figures 8 to 11 As shown, in some embodiments, a water diversion tray 441 is provided below the bottom port of the nozzle 44 at intervals, a water guide column 442 extending upward is convexly provided at the center of the top surface of the water diversion tray 441, and the water guide column 442 is arranged opposite to the bottom port of the nozzle 44 at intervals. Therefore, water sprayed from the bottom port of the nozzle 44 can flow to the water guide column 442, be guided to the peripheral side of the water diversion tray 441 through the water guide column 442, and then be sprayed to each inner wall of the inner cavity 10 through the peripheral side of the water diversion tray 441.

[0081] In some embodiments, the water guide column 442 is conical and extends upward from the center of the top surface of the water diversion plate 441. In the upward direction, the diameter of the water guide column 442 gradually decreases. Therefore, when the water sprayed from the nozzle 44 flows directly toward the water guide column 442, the water flow can be divided along the outer wall of the water guide column 442, dispersedly flow to the peripheral side of the water diversion plate 441, and sprayed to each inner wall of the inner cavity 10 through the peripheral side of the water diversion plate 441.

[0082] In some embodiments, the water diversion plate 441 is circular, and an arc-shaped water diversion groove 440 is concavely provided on the top surface of the water diversion plate 441. The water guide column 442 protrudes upward from the center of the bottom surface of the water diversion groove 440. Therefore, when the water sprayed from the nozzle 44 flows directly toward the water guide column 442, the water flow can be diverted along the outer wall of the water guide column 442, and dispersedly flows along the groove wall of the water diversion groove 440 to the surrounding side of the water diversion groove 440, and is sprayed obliquely upward to the top wall of the inner cavity 10 and each surrounding side wall through the surrounding side of the water diversion groove 440, thereby improving the flushing effect on the top wall of the inner cavity 10.

[0083] See also Figures 10 to 12 As shown, in some embodiments, a fixed bracket 443 is provided between the nozzle 44 and the water diversion tray 441, and the fixed bracket 443 is an arc-shaped bending structure, and the fixed bracket 443 is provided at the periphery of the nozzle 44 and the water diversion tray 441. The top end of the fixed bracket 443 bends and extends toward the center of the nozzle 44, and is fixedly connected to the outer wall of the nozzle 44. The bottom end of the fixed bracket 443 bends and extends toward the center of the water diversion tray 441, and is connected to the bottom surface of the water diversion tray 441, so that the water diversion tray 441 can be stably and spaced below the nozzle 44. Therefore, an appropriate distance can be maintained between the fixed bracket 443 and the water guide column 442, so that the fixed bracket 443 will not hinder the bottom port of the nozzle 44 from spraying water to the water guide column 442. At the same time, the distance between the fixed bracket 443 and the peripheral side wall of the water diversion tray 441 can be reduced, when water flows through the peripheral side of the water diversion tray 441 and sprays toward the inner walls of the inner cavity 10, the blocking area of ​​the fixed bracket 443 to the water flow can be reduced, thereby improving the spraying effect and cleaning effect on the inner walls of the inner cavity 10.

[0084] In some embodiments, a support rib 444 is convexly provided on the outer wall of the bottom port of the nozzle 44, and the support rib 444 is annular and arranged around the outer peripheral wall of the bottom port of the nozzle 44. The top end of the fixed bracket 443 bends and extends toward the center of the nozzle 44, and is fixedly connected to the support rib 444, thereby increasing the spacing between the fixed bracket 443 and the water guide column 442 and the peripheral side wall of the water distribution plate 441, thereby reducing the blocking effect on the water flow.

[0085] Fig.13 yes Fig.12 A schematic structural diagram of another embodiment. Fig.14 yes Fig.13 A cross-sectional view of .

[0086] See also Figure 13 to Figure 14 As shown, the nozzle 44 of this embodiment has a structure similar to Figures 10 to 12 The nozzles 44 shown in the figure have similar structures, and a water distribution plate 441 and a fixing bracket 443 are provided under the nozzles 44. The difference is that in the structure of the nozzle 44 of this embodiment, no supporting ribs 444 are provided on the outer peripheral wall of the lower end of the nozzle 44, and the top end of the fixing bracket 443 bends and extends toward the center of the nozzle 44, and is directly fixed on the outer peripheral wall of the lower end of the nozzle 44.

[0087] In some embodiments, a plurality of water-guiding ribs 445 extending outward are convexly provided on the outer peripheral wall of the water-dividing tray 441, and the water-guiding ribs 445 extend radially outward. The plurality of water-guiding ribs 445 are arranged circumferentially and spaced around the outer peripheral wall of the water-dividing tray 441. Therefore, when the water flow is sprayed toward the peripheral side of the water-dividing tray 441, part of the water flow can flow along the water-guiding ribs 445, and spray toward the inner wall of the inner cavity 10 through the outer end of the water-guiding ribs 445, thereby increasing the spraying area of ​​the water-dividing tray 441. At the same time, part of the water flow can be directly sprayed toward the inner wall of the inner cavity 10 through the gap between adjacent water-guiding ribs 445, thereby allowing the water flow to be sprayed toward the inner wall of the cavity along different spraying paths, thereby improving the spraying effect of the water flow, thereby improving the flushing effect of the cyclic flushing.

[0088] See also Figures 1 to 7 As shown, based on the technical solutions of the household appliances in the above embodiments, an embodiment of the present invention further provides a self-cleaning method for a household appliance, the self-cleaning method comprising:

[0089] Step S1: receiving a self-cleaning instruction. Specifically, the user autonomously activates the self-cleaning function, thereby generating a self-cleaning command, and the controller can automatically receive the self-cleaning instruction. It should be noted that before the user activates the self-cleaning function, the user needs to first put a detergent into the water collection tank 122 of the inner cavity 10, and the detergent can be a solid or liquid detergent.

[0090] Step S2: In response to the self-cleaning instruction, the water pump 33 is controlled to deliver clean water into the inner cavity 10. Specifically, the controller can control the water pump 33 to pump the water in the water inlet box into the inner cavity 10, so that a certain amount of clean water is in the water collection tank 122, and the clean water dissolves the detergent in the water collection tank 122, so that the detergent and the clean water form a mixture. At the same time, the mixture formed by the detergent and the clean water can enter the water collection box 46 through the drain port 123 at the bottom of the water collection tank 122.

[0091] Step S3: Control the circulation pump 41 to extract the liquid in the inner cavity 10, and control the first pipeline 42 to open and the second pipeline 43 to close, and spray the liquid in the water collection tank 122 to the inner wall of the inner cavity 10 through the first pipeline 42 and the nozzle 44, so as to circulate and flush the inner wall of the inner cavity 10. Specifically, the controller can open the first electromagnetic valve 421 and close the second electromagnetic valve 431, so that the first pipeline 42 is opened and the second pipeline 43 is closed, and at the same time control the circulation pump 41 to work, extract the mixture of water and detergent in the water collection tank 122, and spray the mixture of water and detergent in the water collection tank 122 to each inner wall of the inner cavity 10 through the first pipeline 42 and the nozzle 44, and the mixture of water and detergent flows downward along the wall, automatically gathers in the water collection tank 122, and is extracted again by the circulation pump 41, thereby realizing the circulatory flushing of the inner wall of the inner cavity 10, and realizing the automatic cleaning of the inner wall of the inner cavity 10.

[0092] Step S4: After the cyclic flushing is completed, the circulation pump 41 is controlled to extract the liquid in the inner cavity 10, and the first pipeline 42 is controlled to be closed and the second pipeline 43 is controlled to be opened, and the liquid pump 33 in the water collection tank 122 is pumped into the sewage box 45 through the second pipeline 43. Specifically, the controller can close the first solenoid valve 421 and open the second solenoid valve 431, so that the first pipeline 42 is closed and the second pipeline 43 is opened, and at the same time, the circulation pump 41 is controlled to work, and the sewage in the water collection tank 122 is extracted, and then the sewage pump 33 in the water collection tank 122 is pumped into the sewage box 45 through the second pipeline 43 for collection, so as to complete the preliminary cleaning of the inner wall of the inner cavity 10.

[0093] Step S5: Repeat the above steps S2 to S4. In this process, no detergent is added to the water collection tank 122, so that only a certain amount of clean water can be contained in the water collection tank 122. The clean water in the water collection tank 122 is extracted by the circulation pump 41 to circulate and flush the inner walls of the inner cavity 10, further improving the cleaning effect of the inner wall of the inner cavity 10, until the turbidity value of the water in the water collection tank 122 is less than the preset threshold value, and then the circulation stops. It should be noted that the turbidity value of the water in the water collection tank 122 of the inner cavity 10 can be known by detecting the turbidity value in the water collection box 46.

[0094] In some embodiments, step S2 further includes: in response to the self-cleaning instruction, controlling the water pump 33 to pump clean water into the steam generator 34, forming high-temperature steam through the steam generator 34, and delivering the high-temperature steam into the inner cavity 10 to perform steam cleaning; after the steam cleaning is performed for a preset time, turning off the steam generator 34, controlling the water pump 33 to deliver clean water into the inner cavity 10, and allowing the clean water to enter the water collection tank to dissolve the detergent in the water collection tank 122. Specifically, before performing the circulation cleaning of water and detergent, the oil stains in the inner cavity 10 can be preliminarily cleaned by steam cleaning, and then the circulation cleaning of water and detergent can be performed, and then the cleaning effect of the inner wall of the inner cavity 10 can be improved by combining steam cleaning and water cleaning.

[0095] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A household appliance, characterized in that: include: A housing, which forms the outer shell of the household appliance; An inner cavity is provided in the box body, and a drainage port is provided at the bottom of the inner cavity; A circulation pump, whose water inlet end is connected to the drain port, and whose water outlet end is connected to the first pipeline and the second pipeline respectively; a nozzle is provided at one end of the first pipeline away from the circulation pump, and the nozzle is connected to the inner cavity; A clean water box, used for storing clean water, the clean water box is connected to the inner cavity through a water inlet pipeline, and a water pump is provided on the water inlet pipeline; A controller, respectively connected to the water pump and the circulation pump by signals; The controller can control the water pump to transport the clean water in the clean water box into the inner cavity; and the controller can control the circulation pump to extract the liquid in the inner cavity through the drain port, and control the first pipeline to open and the second pipeline to close, and spray the liquid to the inner wall of the inner cavity through the first pipeline and the nozzle to circulate and flush the inner wall of the inner cavity; After the circulating flushing is completed, the controller can control the circulating pump to extract the liquid in the inner cavity through the drain port, and control the first pipeline to close and the second pipeline to open, so as to discharge the liquid from the inner cavity through the second pipeline.

2. The household appliance according to claim 1, characterized in that: A steam generator is provided on the water inlet pipeline, and the steam generator is provided downstream of the water pump; The water pump can draw the clean water in the clean water box into the steam generator, and then transport the clean water into the inner cavity after passing through the steam generator.

3. The household appliance according to claim 1, characterized in that: The household appliance further comprises a sewage box; an end of the second pipeline away from the circulation pump is connected to the sewage box; After the cyclic flushing is completed, the controller can control the circulation pump to extract the liquid from the inner cavity and transport the liquid into the sewage box through the second pipeline.

4. The household appliance according to claim 3, characterized in that: The first pipeline is provided with a first solenoid valve, and the first pipeline is provided with a second solenoid valve; the first solenoid valve and the second solenoid valve are respectively connected to the controller; The controller can control the first solenoid valve to open, and control the second solenoid valve to close, so that the first pipeline is opened and the second pipeline is closed, and the circulation pump can spray the extracted liquid into the inner cavity through the first pipeline and the nozzle; The controller can control the first electromagnetic valve to close, and control the first electromagnetic valve to open, so that the first pipeline is closed and the second pipeline is opened, and the circulation pump can transport the extracted liquid into the sewage box through the second pipeline.

5. The household appliance according to claim 1, characterized in that: A water collecting box is provided in the box body, and the drain port is connected to the water collecting box; The water inlet end of the circulation pump is communicated with the water collecting box, so that the circulation pump can extract the liquid in the inner cavity through the water collecting box.

6. The household appliance according to claim 5, characterized in that: A turbidity sensor is provided in the water collecting box, and the turbidity sensor is connected to the controller signal; The turbidity sensor is used to detect the turbidity value of the liquid in the water collecting box.

7. The household appliance according to claim 1, characterized in that: The drain outlet is covered with a filter cover, and a plurality of filter holes are arranged on the filter cover.

8. The household appliance according to claim 1, characterized in that: A fixed tube is provided at the top of the inner cavity, the top of the fixed tube is connected to the first pipeline, and the bottom end of the fixed tube extends into the inner cavity; The nozzle is arranged in the inner cavity, and the top end of the nozzle is detachably connected to the bottom end of the fixed tube; The nozzle can spray water toward the inner wall of the inner cavity through the bottom port thereof.

9. The household appliance according to claim 8, characterized in that: A water distribution plate is provided below the bottom port of the nozzle at intervals, a water guide column extending upward is convexly provided at the center of the top surface of the water distribution plate, and the water guide column is arranged opposite to the bottom port of the nozzle at intervals; The water sprayed from the nozzle can be guided to the peripheral side of the water diversion plate through the water guide column, and then sprinkled to the inner wall of the inner cavity through the peripheral side of the water diversion plate.

10. The household appliance according to claim 9, characterized in that: The water distribution plate is circular, and an arc-shaped water distribution groove is concavely provided on the top surface of the water distribution plate; The water guide column is cone-shaped and protrudes upward from the center of the bottom surface of the water diversion groove; The water sprayed from the nozzle can be introduced into the water diversion groove through the water guide column, and sprinkled toward the inner wall of the inner cavity along the peripheral side of the water diversion groove.

11. The household appliance according to claim 9, characterized in that: A fixing bracket is provided between the nozzle and the water dividing plate, and the fixing bracket is provided on the outer periphery of the nozzle and the water dividing plate; The top end of the fixing bracket bends and extends toward the center of the nozzle and is connected to the outer wall of the nozzle; the bottom end of the fixing bracket bends and extends toward the center of the water distribution tray and is connected to the bottom surface of the water distribution tray.

12. A self-cleaning method for household appliances, characterized in that: The household appliance is a household appliance as claimed in any one of claims 3 to 11; The self-cleaning method comprises: S1: receiving self-cleaning instructions; S2: Control the water pump to deliver clean water into the inner cavity; S3: Control the circulation pump to extract the liquid in the inner cavity, and control the first pipeline to open and the second pipeline to close, and spray the liquid in the inner cavity toward the inner wall of the inner cavity through the first pipeline and the nozzle to circulate and flush the inner wall of the inner cavity; S4: After the cyclic flushing is completed, the circulating pump is controlled to extract the liquid in the inner cavity, and the first pipeline is controlled to be closed and the second pipeline is controlled to be opened, and the extracted liquid is transported into the sewage box through the second pipeline.

13. The self-cleaning method for a household appliance according to claim 12, characterized in that: The self-cleaning method further includes: before receiving the self-cleaning instruction, placing a cleaning agent into the inner cavity, starting the self-cleaning function, and generating a self-cleaning instruction.

14. The self-cleaning method for a household appliance according to claim 13, characterized in that: The self-cleaning method also includes: S5: The above steps S2 to S4 are repeated in a loop until the turbidity value of the liquid in the inner cavity is less than a preset threshold value, and the loop ends.

15. The self-cleaning method for a household appliance according to claim 13, characterized in that: The control water pump delivers clean water into the inner cavity, comprising: Control the water pump to pump clean water into the steam generator, form steam through the steam generator, and transport the steam into the inner cavity for steam cleaning; After the steam cleaning preset time, the steam generator is turned off and the water pump is controlled to deliver clean water into the inner cavity.

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