Household appliance

Abstract

The invention relates to a household appliance. The household appliance comprises a box body; an inner cavity is formed in the box body; a water outlet is formed in the bottom of the inner cavity; the impeller is rotatably arranged in the inner cavity; a first nozzle is formed at the outlet end of the first spray head and faces the impeller; the inlet end of the first nozzle is connected with liquid through a first pipeline; a second nozzle is formed at the outlet end of the second spray head and faces the fan blades of the impeller; the outlet end of the steam generator is communicated with the second spray head through a second pipeline; liquid is sprayed to the impeller through the first pipeline and the first nozzle; meanwhile, the steam generator can spray steam to fan blades of the impeller through a second pipeline and a second nozzle, the impeller is driven to rotate, liquid is sprayed to the inner wall of the inner cavity through rotation of the impeller, so that the inner wall of the inner cavity is circularly cleaned, and the liquid spraying uniformity of the impeller is improved; the problem that the cavity of the household appliance is difficult to clean is efficiently solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a household appliance. 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 to optimize the cleaning structure of the household appliance in the related art and effectively 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 arranged in the housing; an impeller is rotatably arranged in the inner cavity; a first nozzle, whose outlet end forms a first nozzle, the first nozzle is arranged in the inner cavity and arranged toward the impeller; the inlet end of the first nozzle is connected to the liquid through a first pipeline; a second nozzle, whose outlet end forms a second nozzle, the second nozzle is arranged in the inner cavity and arranged toward the fan blades of the impeller; a steam generator, the outlet end of the steam generator is connected to the inlet end of the second nozzle through a second pipeline; wherein the liquid can be introduced into the first nozzle through the first pipeline and sprayed into the impeller through the first nozzle; at the same time, the steam generator can generate steam, and introduce the steam into the second nozzle through the second pipeline, and spray it onto the fan blades of the impeller through the second nozzle, driving the impeller to rotate, and through the rotation of the impeller, the liquid is sprinkled onto the inner wall of the inner cavity to clean the inner wall of the inner cavity.

[0007] According to another aspect of the present invention, the present invention further 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; an impeller is rotatably arranged in the inner cavity; a first nozzle, whose outlet end forms a first nozzle, and the first nozzle is arranged in the inner cavity and arranged toward the impeller; a circulating pump, the water inlet end of the circulating pump is connected with the drain outlet, and the water outlet end of the circulating pump is connected with the inlet end of the first nozzle through a first pipeline; a second nozzle, whose outlet end forms a second nozzle, and the second nozzle is arranged in the inner cavity and arranged toward the blades of the impeller; a steam generator, the outlet end of the steam generator is connected with the inlet end of the second nozzle through a second pipeline; a clean water box, the clean water box is connected with the inlet end of the steam generator through a water inlet pipeline, and the water inlet pipeline A water pump is provided on the road; a sewage box is connected to the water outlet end of the circulation pump through a third pipeline; a controller is respectively connected to the circulation pump, the water pump and the steam generator by signal; wherein, the controller can control the circulation pump to extract the liquid in the inner cavity and spray it into the impeller through the first pipeline and the second nozzle; at the same time, the controller can control the water pump to draw the clean water in the clean water box into the steam generator to form steam, and introduce the steam into the second nozzle through the second pipeline, and spray it onto the blades of the impeller through the second nozzle, drive the impeller to rotate, and through the rotation of the impeller, the liquid is sprinkled onto the inner wall of the inner cavity, so as to circulate and clean the inner wall of the inner cavity; after the circulation cleaning is completed, the controller can control the circulation pump to extract the liquid in the inner cavity, and draw the liquid into the sewage box through the third pipeline.

[0008] The embodiments of the present invention have the following positive effects:

[0009] In the household appliance of the embodiment of the present invention, a first nozzle, a second nozzle and a rotatable impeller are arranged in the inner cavity of the box body, the outlet end of the first nozzle forms a first nozzle and is arranged toward the impeller, and the outlet end of the second nozzle forms a second nozzle and is arranged toward the blades of the impeller; the steam generator is used to generate steam and form power, and the steam can be introduced into the second nozzle through the second pipeline to be sprayed toward the blades of the impeller through the second nozzle, thereby driving the impeller to rotate; at the same time, the liquid is sprayed toward the impeller through the first pipeline and the first nozzle of the first nozzle, and the liquid falling on the impeller can be thrown around by the rotation of the impeller, and then evenly sprinkled on each inner wall of the inner cavity, so as to clean the inner wall of the inner cavity and improve the uniformity of the impeller spraying the liquid. In addition, the steam sprayed by the second nozzle can heat the impeller and the liquid on the impeller, improve the cleaning effect on the inner wall of the inner cavity, and improve the energy utilization rate, thereby realizing the cleaning function of the inner cavity of the household appliance, and effectively solving the problem that the cavity of the household appliance is difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of a household appliance according to an embodiment of the present invention.

[0011] Figure 2 yes Figure 1 Schematic diagram of some of the internal structures.

[0012] Figure 3 yes Figure 2 Schematic diagram of the structure from another perspective.

[0013] Figure 4 yes Figure 3 Schematic diagram of the cleaning system.

[0014] Figure 5 yes Figure 3 Schematic diagram of part of the structure from another perspective.

[0015] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of area A in the middle.

[0016] Figure 7 yes Figure 2 Top view of the .

[0017] Figure 8 yes Figure 7 Middle BB section view.

[0018] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure of the C area in the middle.

[0019] Fig.10 yes Figure 8 Schematic diagram of the enlarged structure of the D area in the middle.

[0020] Fig.11 yes Fig. 9 Schematic diagram of some structures in .

[0021] Fig.12 yes Fig.11 Schematic diagram of the structure of the first nozzle and the first pipeline.

[0022] Fig.13 yes Fig.11 Schematic diagram of the structure of the second nozzle and the second pipeline.

[0023] Fig.14 yes Fig.13 Schematic diagram of the structure of the second nozzle.

[0024] Fig.15 yes Fig.11 Schematic diagram of the structure of the impeller, rotating shaft, limiting sleeve and fixing parts.

[0025] Fig.16 yes Fig.15 A cross-sectional view of .

[0026] Fig.17 yes Fig.15 Schematic diagram of the decomposition.

[0027] The reference numerals are as follows: 1. box body; 10. inner cavity; 101. first assembly groove; 102. second assembly groove; 103. third assembly groove; 11. liner; 111. heating device; 113. water collecting groove; 114. drain outlet; 115. filter cover; 116. first mounting hole; 117. second mounting hole; 118. third mounting hole; 12. door frame; 121. door seal; 13. heat dissipation duct; 131. heat dissipation fan; 132. air guide cover; 14. support top plate; 15. support back plate; 2. box door; 31. clean water box; 32. water inlet pipeline; 33. water pump; 34. steam generator; 35. fourth pipeline; 351. fourth switch valve; 36. second pipeline; 361. third switch valve; 37. The second nozzle; 3701, the first pipe section; 3702, the second pipe section; 371, the second nozzle; 372, the injection part; 373, the second limiting rib; 374, the second external thread; 41, the first nozzle; 411, the first nozzle; 413, the first limiting rib; 414, the first external thread; 42, the circulation pump; 43, the sewage box; 44, the first pipeline; 441, the first switch valve; 45, the drain pipe; 46, the third pipeline; 461, the second switch valve; 5, the controller; 61, the impeller; 611, the fan blade; 613, the bottom plate; 6131, the extension part; 6132, the convex rib; 614, the notch part; 62, the rotating shaft; 63, the limiting sleeve; 64, the fixing part; 641, the third limiting rib; 642, the third external thread. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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 Schematic diagram of the cleaning system. Figure 5 yes Figure 3 Schematic diagram of part of the structure from another perspective. Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of area A in the middle.

[0034] See also Figures 1 to 6 As 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.

[0035] 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.

[0036] 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.

[0037] The box body 1 is provided with an inner liner 11, and the 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 inside of the inner cavity 10.

[0038] 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.

[0039] 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.

[0040] See also Figure 1 and Figure 2 As 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.

[0041] 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.

[0042] Figure 7 yes Figure 2 Top view of the . Figure 8 yes Figure 7 Middle BB section view.

[0043] See also Figures 3 to 8 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.

[0044] 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.

[0045] 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.

[0046] See also Figures 2 to 8 As 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.

[0047] 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 surface 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.

[0048] See also Figure 5 and Figure 8 As shown, in some embodiments, a heating device 111 is provided in the box body 1. The heating device 111 is provided on the top wall of the inner tank 11, that is, provided in the top area of ​​the inner cavity 10. The heating device 111 is used to heat the air in the inner cavity 10, thereby increasing the temperature inside the inner cavity 10.

[0049] In some embodiments, a heating fan (not shown in the figure) is provided at the rear side wall of the inner cavity 10, and the heating fan is used to generate wind force to transport the hot air generated by the heating device 111 to other areas of the inner cavity 10, thereby enabling the interior of the inner cavity 10 to be evenly heated.

[0050] It should be noted that, in some other embodiments, the heating device 111 may also be disposed on the rear wall or other side walls of the inner cavity 10 to heat the interior of the inner cavity 10 from the rear area or other areas of the inner cavity 10 .

[0051] See also Figures 3 to 8 As shown, in some embodiments, the cleaning system is disposed in the housing 1, and the cleaning system is used to realize the self-cleaning function. The cleaning system includes a clean water box 31, a water inlet pipeline 32, a water pump 33 and a steam generator 34.

[0052] The clean water box 31 is arranged in the housing 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 is connected to the inlet end of the steam generator 34, and the outlet end of the steam generator 34 is connected to the inner cavity 10 through the fourth pipeline 35. The water pump 33 is arranged on the water inlet pipeline 32, and the water pump 33 is used to pump the clean water in the clean water box 31 into the steam generator 34, and heat it through the steam generator 34. The generated steam can be transported into the inner cavity 10 through the outlet end of the steam generator 34 and the fourth pipeline 35, and the inner cavity 10 is steam cooked or steam cleaned by steam. At this time, the fourth pipeline 35 is used as a steam pipeline.

[0053] 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 the clean water in the clean water box 31 is transported into the inner cavity 10 through the water inlet pipe 32, the steam generator 34, and the fourth pipe 35 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 is heated by the steam generator 34, and the temperature of the water in the steam generator 34 is adjusted to form hot water, but it is ensured that the hot water will not turn into steam, and then the hot water of different temperatures can be provided to the inner cavity 10 through the fourth pipe 35, and the fourth pipe 35 is used as a water supply pipe.

[0054] 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.

[0055] In some embodiments, one end of the fourth pipeline 35 away from the steam generator 34 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 in the inner tank 11 .

[0056] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure of the C area in the middle. Fig.10 yes Figure 8 Schematic diagram of the enlarged structure of the D area in the middle.

[0057] See also Figures 3 to 10 As shown, in some embodiments, the cleaning system further includes a first nozzle 41, a circulation pump 42 and a sewage box 43. The first nozzle 41 is arranged inside the inner cavity 10, and a first nozzle 411 is formed at the water outlet end of the first nozzle 41. The circulation pump 42 is arranged in the box body 1 and outside the inner tank 11, and the water outlet end of the circulation pump 42 is connected to the first end of the first pipeline 44, and the second end of the first pipeline 44 is connected to the inside of the first nozzle 41. At the same time, a water collecting tank 113 is provided at the bottom center of the inner cavity 10, and a drain port 114 is provided at the bottom of the water collecting tank 113. A drain pipe 45 is provided below the bottom of the inner tank 11, and the water collecting tank 113 is connected to the first end of the drain pipe 45 through the drain port 114, and the second end of the drain pipe 45 away from the drain port 114 is connected to the water inlet end of the circulation pump 42. Therefore, the circulating pump 42 can draw water from the sump 113 through the drain pipe 45 and the drain outlet 114, that is, draw the liquid in the inner cavity 10, and introduce it into the first nozzle 41 through the first pipe 44, and then spray it into the inner cavity 10 through the first nozzle 411 of the first nozzle 41, so as to clean the inner wall of the inner cavity 10. At the same time, the water sprayed on the inner wall of the inner cavity 10 can flow into the sump 113 and be drawn again by the circulating pump 42, so as to realize the circulation cleaning of the inner wall of the inner cavity 10 and achieve the water cleaning function of the inner cavity 10.

[0058] See also Figures 4 to 10 As shown, in some embodiments, before the cleaning operation is performed, the detergent can be pre-placed into the water collection tank 113, and the clean water in the clean water box 31 is transported into the inner cavity 10 by the water pump 33, thereby dissolving the detergent and mixing the detergent with the water; the mixture of water and detergent in the inner cavity 10 is then extracted by the circulation pump 42 and sprayed onto the inner wall of the inner cavity 10 through the first nozzle 411, thereby effectively improving the cleaning effect of the inner cavity 10.

[0059] See also Figures 2 to 8 As shown, in some embodiments, the sewage box 43 is arranged in the box body 1 and outside the inner tank 11. The water outlet end of the circulation pump 42 is also connected to the first end of the third pipeline 46, and the second end of the third pipeline 46 is connected to the sewage box 43. Therefore, after the circulation cleaning of the inner wall of the inner cavity 10 is completed, the sewage in the inner cavity 10 can be extracted by the circulation pump 42, discharged from the inner cavity 10 through the third pipeline 46, and transported to the sewage box 43 for collection.

[0060] It should be noted that, in other embodiments, the sewage box 43 may also be disposed outside the housing 1. Alternatively, the second end of the third pipe 46 may also be directly connected to the outside of the housing 1. After the inner wall of the inner cavity 10 is circulated and cleaned, the sewage in the inner cavity 10 may be extracted by the circulation pump 42, and discharged from the inner cavity 10 through the third pipe 46, and directly discharged outside the housing 1.

[0061] See also Figure 3 and Figure 4 As shown, in some embodiments, a first switch valve 441 is provided on the first pipeline 44, and the first switch valve 441 is used to open and close the first pipeline 44. The first switch valve 441 is provided at the first end of the first pipeline 44, and is provided at the connection between the first pipeline 44 and the outlet end of the circulation pump 42. At the same time, a second switch valve 461 is provided at the first end of the third pipeline 46, and the second switch valve 461 is used to open and close the third pipeline 46. The second switch valve 461 is provided at the first end of the third pipeline 46, and is provided at the connection between the third pipeline 46 and the outlet end of the circulation pump 42. Both the first switch valve 441 and the second switch valve 461 can be electromagnetic valves.

[0062] Therefore, when the inner wall of the inner cavity 10 needs to be circulated and cleaned, the first pipeline 44 can be opened through the first switch valve 441, and the third pipeline 46 can be closed through the second switch valve 461, so that the circulation pump 42 can spray the extracted liquid onto the inner wall of the inner cavity 10 through the first pipeline 44 and the first nozzle 41. When the sewage in the inner cavity 10 needs to be discharged, the first pipeline 44 can be closed through the first switch valve 441, and the third pipeline 46 can be opened through the second switch valve 461, so that the circulation pump 42 can discharge the extracted sewage from the inner cavity 10 through the third pipeline 46 and transport it into the sewage box 43.

[0063] It should be noted that, in some other embodiments, a three-way valve (not shown in the figure) may be provided at the connection between the outlet end of the circulation pump 42 and the first pipeline 44 and the third pipeline 46. The three-way valve may be an electromagnetic switching valve, which has an inlet and two outlets, wherein the inlet of the three-way valve is connected to the outlet end of the circulation pump 42, one outlet of the three-way valve is connected to the first end of the first pipeline 44, and the other outlet of the three-way valve is connected to the first end of the third pipeline 46. Therefore, by switching the three-way valve to control the connection between the two outlets and the inlet, the first pipeline 44 can be closed and the third pipeline 46 can be opened, or the first pipeline 44 can be opened and the third pipeline 46 can be closed.

[0064] See also Figures 2 to 8 As shown, in some embodiments, the cleaning system further includes a controller 5, which is disposed in the housing 1 and above the top of the air guide cover 132 to facilitate heat dissipation of the controller 5. The controller 5 is connected to the water pump 33 by signal. Therefore, the water pump 33 can be controlled by the controller 5 to transport the clean water in the clean water box 31 into the steam generator 34.

[0065] In some embodiments, the controller 5 is connected to the steam generator 34 by signal. Therefore, the controller 5 can control the steam generator 34 to heat the water entering the steam generator 34, control the temperature of the water flowing through the steam generator 34, make the water flowing through the steam generator 34 form hot water or steam, and then transport the hot water or steam into the inner cavity 10.

[0066] In some embodiments, the controller 5 is connected to the circulation pump 42, the first switch valve 441 and the second switch valve 461 by signal. Therefore, the controller 5 can control the first switch valve 441 to open, and control the second switch valve 461 to close, so that the first pipeline 44 is opened and the third pipeline 46 is closed, and then the circulation pump 42 can be controlled by the controller 5 to extract the liquid in the inner cavity 10, and the extracted liquid is transported into the first nozzle 41 through the first pipeline 44, and sprayed into the inner cavity 10 through the first nozzle 411 of the first nozzle 41, so as to circulate and clean the inner wall of the inner cavity 10. At the same time, the controller 5 can control the first switch valve 441 to close, and control the second switch valve 461 to open, so that the first pipeline 44 is closed and the third pipeline 46 is opened, and then the circulation pump 42 can be controlled by the controller 5 to extract the liquid in the inner cavity 10, and the extracted water is transported into the sewage box 43 through the third pipeline 46 for collection, so as to realize the intelligent and efficient cleaning function and cleaning effect of the inner cavity 10.

[0067] See also Figures 2 to 10 As shown, in some embodiments, a filter cover 115 is provided at the bottom of the water collection tank 113, and the filter cover 115 is provided above the drain port 114. The filter cover 115 is densely covered with filter holes (not shown in the figure). Therefore, the liquid in the water collection tank 113 can be filtered through the filter holes of the filter cover 115, and then discharged through the drain port 114, and enter the circulation pump 42 through the drainage pipe 45, so as to prevent debris, particulate matter, etc. from entering the drainage pipe 45 and clogging the circulation pump 42.

[0068] In some embodiments, a turbidity sensor (not shown) is provided in the water collection tank 113 of the inner cavity 10, and the turbidity sensor is used to detect the turbidity value of the water in the water collection tank 113 of the inner cavity 10, and the turbidity sensor is connected to the controller 5 by signal. By detecting the turbidity value of the water in the water collection tank 113 of the inner cavity 10 by the turbidity sensor, the degree of dirt in the inner cavity 10 can be known, and then the controller 5 can intelligently control the cleaning parameters such as the time of the circulation cleaning and the cleaning water temperature.

[0069] Fig.11 yes Fig. 9 Schematic diagram of some structures in .

[0070] See also Figures 4 to 11As shown, in some embodiments, the cleaning system further includes an impeller 61, which is rotatably disposed in the inner cavity 10, and the impeller 61 is arranged close to the first nozzle 411 of the first nozzle 41. The impeller 61 has a plurality of blades 611, and the first nozzle 411 of the first nozzle 41 is arranged toward the impeller 61. The liquid in the first nozzle 41 can be sprayed into the impeller 61 through the first nozzle 411, and then the liquid falling on the impeller 61 is thrown around by the rotation of the impeller 61, and sprinkled from the peripheral side of the impeller 61 onto the inner wall of the inner cavity 10, so that the liquid in the first nozzle 41 can be evenly sprinkled onto each inner wall of the inner cavity 10, thereby improving the cleaning effect on the inner wall of the inner cavity 10.

[0071] Fig.12 yes Fig.11 Schematic diagram of the structure of the first nozzle 41 and the first pipeline 44.

[0072] See also Figures 3 to 12 As shown, in some embodiments, the first nozzle 41 extends vertically, and the top of the first nozzle 41 extends out of the inner cavity 10, that is, the top of the first nozzle 41 protrudes out of the outer wall of the top of the inner tank 11, and the top of the first nozzle 41 forms the inlet end of the first nozzle 41, and is connected to the first pipeline 44. The bottom port of the first nozzle 41 is arranged toward the impeller 61, and the first nozzle 411 is formed at the bottom port of the first nozzle 41. When the first nozzle 411 sprays liquid toward the impeller 61, the sprayed liquid can fall on the impeller 61, and then as the impeller 61 rotates, it is sprinkled from the peripheral side of the impeller 61 to the inner wall of the inner cavity 10, thereby improving the uniformity of liquid spraying.

[0073] In some embodiments, a first limiting rib 413 is convexly provided on the outer wall of the first nozzle 41, and the first limiting rib 413 is annular and arranged around the outer peripheral wall of the first nozzle 41. A first external thread 414 is provided on the outer peripheral wall of the first nozzle 41, and the first external thread 414 is provided above the first limiting rib 413. At the same time, a first mounting hole 116 matching with the first nozzle 41 is provided on the top wall of the inner cavity 10, and the first nozzle 41 is penetrated at the first mounting hole 116. At this time, the first limiting rib 413 can abut against the top wall of the inner cavity 10, and the first external thread 414 extends out of the inner cavity 10 and is provided above the first mounting hole 116, that is, the first external thread 414 is exposed above the top wall of the inner tank 11. Therefore, by sleeved on the first nozzle 41, a nut (not shown in the figure) is threadedly connected to the first external thread 414, and the nut is located above the top of the inner liner 11. By fixing the nut and the first limiting rib 413 on the upper and lower sides of the top wall of the inner liner 11, the first nozzle 41 can be fixedly installed at the first mounting hole 116 on the top wall of the inner liner 11.

[0074] See also Figure 6As shown, in some embodiments, a first assembly groove 101 that is recessed and extends upward is provided on the top surface of the inner cavity 10, and the first mounting hole 116 is provided in the first assembly groove 101. At the same time, the bottom surface of the first limiting rib 413 is flush with the bottom end surface of the first nozzle 41. Therefore, when the first nozzle 41 is inserted into the first mounting hole 116, the first limiting rib 413 can be embedded in the first assembly groove 101, and the first limiting rib 413 and the bottom end surface of the first nozzle 41 are flush with the top surface of the inner cavity 10.

[0075] Fig.13 yes Fig.11 Schematic diagram of the structure of the second nozzle 37 and the second pipeline 36.

[0076] See also Figures 3 to 13 As shown, in some embodiments, the cleaning system further includes a second pipeline 36 and a second nozzle 37. A second nozzle 371 is formed at the water outlet end of the second nozzle 37, and the second nozzle 371 is arranged in the inner cavity 10 and arranged toward the blades 611 of the impeller 61. The first end of the second pipeline 36 is connected to the second nozzle 37, and the second end of the second pipeline 36 is connected to the outlet end of the steam generator 34. Therefore, when the circulation pump 42 draws liquid from the inner cavity 10 and sprays it onto the impeller 61 through the first pipeline 44 and the first nozzle 411 of the first nozzle 41, the water pump 33 can draw the water in the clean water box 31 into the steam generator 34 for heating, and the steam generated by the heating can be introduced into the second nozzle 37 through the second pipeline 36, and sprayed onto the fan blades 611 of the impeller 61 through the second nozzle 371 of the second nozzle 37, and then the steam pressure is used to form power to drive the impeller 61 to rotate, and then the liquid falling on the impeller 61 is thrown to the surroundings through the rotation of the impeller 61, and sprinkled from the peripheral side of the impeller 61 to the inner wall of the inner cavity 10, so that the liquid on the impeller 61 can be evenly sprinkled on each inner wall of the inner cavity 10, thereby improving the cleaning effect of the inner wall of the inner cavity 10. In addition, when the second nozzle 371 sprays steam toward the blades 611 of the impeller 61, the liquid on the impeller 61 can be heated, thereby further improving the cleaning effect on the inner wall of the inner cavity 10 and improving energy utilization.

[0077] In some embodiments, a third switch valve 361 is provided on the second pipeline 36, and the third switch valve 361 is used to open and close the second pipeline 36. A fourth switch valve 351 is provided on the fourth pipeline 35, and the fourth switch valve 351 is used to open and close the fourth pipeline 35. Both the third switch valve 361 and the fourth switch valve 351 can be electromagnetic valves. The third switch valve 361 and the fourth switch valve 351 are both connected to the controller 5 signal. Therefore, the controller 5 can control the third switch valve 361 to close and the fourth switch valve 351 to open, so that the second pipeline 36 is closed and the fourth pipeline 35 is opened, so that the controller 5 can control the water pump 33 to extract the water in the clean water box 31 and transport it into the steam generator 34 for heating, and the hot water or steam formed by heating can be transported into the inner cavity 10 through the fourth pipeline 35. At the same time, the controller 5 can also control the third switch valve 361 to open and the fourth switch valve 351 to close, so that the second pipeline 36 is opened and the fourth pipeline 35 is closed, and then the controller 5 can control the water pump 33 to extract the water in the clean water box 31 and transport it into the steam generator 34 for heating. The steam formed by heating can be transported into the second nozzle 37 through the second pipeline 36, and sprayed to the fan blades 611 of the impeller 61 through the second nozzle 371 of the second nozzle 37. The pressure of the steam is used to form power to drive the impeller 61 to rotate, and then the liquid falling on the impeller 61 is thrown to the surroundings through the rotation of the impeller 61, and sprinkled from the peripheral side of the impeller 61 to the inner wall of the inner cavity 10, so that the liquid on the impeller 61 can be evenly sprinkled on each inner wall of the inner cavity 10, thereby improving the cleaning effect of the inner wall of the inner cavity 10.

[0078] It should be noted that, in some embodiments thereof, the controller 5 can also be used to control the water pump 33 to extract water from the clean water box 31 and transport it into the steam generator 34 for heating. The heated hot water can be transported into the second nozzle 37 through the second pipeline 36. The second nozzle 371 of the second nozzle 37 is used to spray the hot water onto the blades 611 of the impeller 61 alone, driving the impeller 61 to rotate. The liquid falling on the impeller 61 is then thrown to the surroundings through the rotation of the impeller 61, and sprinkled from the peripheral side of the impeller 61 onto the inner wall of the inner cavity 10, so that the inner wall of the inner cavity 10 is rinsed with hot water, thereby improving the cleaning effect of the inner wall of the inner cavity 10. Alternatively, the controller 5 can also be used to control the water pump 33 to extract water from the clean water box 31 and transport it into the steam generator 34 for heating. The steam generated by heating can be transported into the second nozzle 37 through the second pipeline 36, and the second nozzle 371 of the second nozzle 37 is used to spray the steam into the inner cavity 10 to steam clean the inner wall of the inner cavity 10, thereby improving the cleaning effect of the inner wall of the inner cavity 10.

[0079] In some embodiments, a pressure sensor (not shown in the figure) is provided on the second pipeline 36, and the pressure sensor is used to detect the pressure value inside the second pipeline 36. The pressure sensor is connected to the controller 5 signal. Therefore, the pressure value inside the second pipeline 36 can be detected by the pressure sensor. When the water pressure or air pressure in the second pipeline 36 is low, the controller 5 can control the circulation pump 42 to work continuously; when the water pressure or air pressure in the second pipeline 36 is high, the controller 5 can control the circulation pump 42 to work intermittently; when the water pressure or air pressure in the second pipeline 36 is higher than the safety threshold, the controller 5 can control the circulation pump 42 to stop working, thereby being able to keep the pressure values ​​in the second nozzle 37 and the second pipeline 36 within a safe range, ensuring the normal and safe operation of the cleaning system.

[0080] Fig.14 yes Fig.13 Schematic diagram of the structure of the second nozzle 37.

[0081] See also Figure 6 and Fig.14 As shown, in some embodiments, the second nozzle 37 extends vertically, and the top of the second nozzle 37 extends out of the inner cavity 10, that is, the top of the second nozzle 37 protrudes out of the outer wall of the top of the inner tank 11, and the top of the second nozzle 37 forms the inlet end of the second nozzle 37, and is connected with the second pipeline 36. The bottom end of the second nozzle 37 is provided with a spraying portion 372 that bends and extends toward the impeller 61, and the outlet of the spraying portion 372 faces the blade 611 of the impeller 61 and forms a second nozzle 371. When the second nozzle 371 sprays liquid toward the blade 611, the sprayed liquid can apply thrust to the blade 611, thereby rotating the impeller 61, and when the impeller 61 rotates, the outlet of the spraying portion 372 can spray toward the side walls of different blades 611 of the impeller 61 in sequence, so that it can provide power to continuously rotate the impeller 61.

[0082] In some embodiments, a second limiting rib 373 is convexly provided on the outer wall of the second nozzle 37, and the second limiting rib 373 is annular and arranged around the outer peripheral wall of the second nozzle 37, and the injection portion 372 is arranged below the second limiting rib 373. A second external thread 374 is arranged on the outer peripheral wall of the second nozzle 37, and the second external thread 374 is arranged above the second limiting rib 373. At the same time, a second mounting hole 117 matching with the second nozzle 37 is opened on the top wall of the inner cavity 10, and the second nozzle 37 is penetrated at the second mounting hole 117. At this time, the second limiting rib 373 can abut against the top wall of the inner cavity 10, and the second external thread 374 extends out of the inner cavity 10 and is arranged above the second mounting hole 117, that is, the second external thread 374 is exposed above the top wall of the inner liner 11. Therefore, by sleeved on the second nozzle 37, the nut is threadedly connected to the second external thread 374, and the nut is located above the top of the inner liner 11. By fixing the nut and the second limiting rib 373 on the upper and lower sides of the top wall of the inner liner 11, the second nozzle 37 can be fixedly installed in the second mounting hole 117 on the top wall of the inner liner 11.

[0083] See also Figure 6 As shown, in some embodiments, the top surface of the inner cavity 10 is provided with a second assembly groove 102 that is recessed and extends upward, and the second mounting hole 117 is provided in the second assembly groove 102. When the second nozzle 37 is inserted into the second mounting hole 117, the second limiting rib 373 can be engaged in the second assembly groove 102, and the bottom end surface of the second limiting rib 373 is flush with the top surface of the inner cavity 10.

[0084] See also Fig.14 As shown, in some embodiments, the second nozzle 37 includes a first pipe section 3701 and a second pipe section 3702 connected to each other from top to bottom. The first limiting rib 413 is provided on the outer peripheral wall of the bottom end of the first pipe section 3701, the first pipe section 3701 can be extended upward by the second limiting rib 373, and the second pipe section 3702 can be extended downward by the second limiting rib 373. The injection portion 372 is formed at the bottom end of the second pipe section 3702.

[0085] In some embodiments, the top end of the second pipe segment 3702 is detachably connected to the bottom end of the first pipe segment 3701. Specifically, the bottom end of the first pipe segment 3701 may be provided with an internal thread, the top end of the second pipe segment 3702 may be provided with an external thread, and the top end of the second pipe segment 3702 may be threadedly connected to the bottom end of the first pipe segment 3701. Therefore, when the second nozzle 37 is not needed to clean the inner wall of the inner cavity 10, the second pipe segment 3702 of the second nozzle 37 may be separated from the first pipe segment 3701, and the second pipe segment 3702 may be taken out of the inner cavity 10. At the same time, the bottom end of the first pipe segment 3701 and the second limiting rib 373 remain flush with the top surface of the inner cavity 10, so that the top wall of the inner cavity 10 can be kept flat.

[0086] Fig.15 yes Fig.11 Schematic diagram of the structure of the middle impeller 61, the rotating shaft 62, the limiting sleeve 63 and the fixing member 64. Fig.16 yes Fig.15 A cross-sectional view of . Fig.17 yes Fig.15 Schematic diagram of the decomposition.

[0087] See also Figures 15 to 17 , and combined with Figure 6 , Fig. 9 As shown, in some embodiments, a rotating shaft 62 is provided in the inner cavity 10, and the rotating shaft 62 is rod-shaped and extends in the up-down direction. The impeller 61 is rotatably sleeved on the rotating shaft 62. Therefore, when the steam in the second nozzle 37 sprays liquid toward the blades 611 of the impeller 61 through the second nozzle 371, the impeller 61 can rotate around the rotating shaft 62.

[0088] In some embodiments, a limiting sleeve 63 is provided at the bottom end of the rotating shaft 62, and the limiting sleeve 63 is located below the impeller 61. The limiting sleeve 63 is detachably sleeved on the bottom end of the rotating shaft 62, and the limiting sleeve 63 abuts against the bottom of the impeller 61, thereby limiting the impeller 61 to rotate on the rotating shaft 62. When the impeller 61 is not needed, the limiting sleeve 63 can be removed from the bottom end of the rotating shaft 62, and then the impeller 61 can be removed from the rotating shaft 62, so that the impeller 61 can be cleaned and replaced.

[0089] In some embodiments, the top end of the rotating shaft 62 is detachably fixed to the top wall of the inner cavity 10. Therefore, when the impeller 61 is not needed, the rotating shaft 62 can be taken out of the inner cavity 10, and the impeller 61 can be removed from the top of the rotating shaft 62 for cleaning or replacement. At this time, the limiting sleeve 63 can be integrally formed at the bottom end of the rotating shaft 62.

[0090] See also Figures 15 to 17 , and combined with Figure 6 , Fig. 9 As shown, in some embodiments, a fixing member 64 is provided on the top wall of the inner cavity 10, and the top end of the rotating shaft member 62 is detachably fixed to the fixing member 64. Specifically, an internal thread may be provided inside the bottom end of the fixing member 64, and an external thread is provided at the top end of the rotating shaft member 62, and the top end of the rotating shaft member 62 is threadedly connected to the bottom end of the fixing member 64.

[0091] In some embodiments, the fixing member 64 is detachably fixed to the top wall of the inner cavity 10. Specifically, a third limiting rib 641 is convexly provided on the outer peripheral wall of the bottom end of the fixing member 64, and the third limiting rib 641 is annular and arranged around the outer peripheral wall of the bottom end of the fixing member 64. A third external thread 642 is provided on the outer peripheral wall of the fixing member 64, and the third external thread 642 is arranged above the third limiting rib 641. At the same time, a third mounting hole 118 is opened on the top wall of the inner cavity 10, and the fixing member 64 is penetrated at the third mounting hole 118. When the fixing member 64 is penetrated at the third mounting hole 118, the third limiting rib 641 can abut against the top wall of the inner cavity 10, and the third external thread 642 extends out of the inner cavity 10 and is arranged above the third mounting hole 118, that is, the third external thread 642 is exposed above the top wall of the liner 11. Therefore, by sleeved on a nut (not shown in the figure) on the fixing member 64, the nut is threadedly connected to the third external thread 642, and the nut is located above the top of the inner liner 11. By fixing the nut and the third limiting rib 641 on the upper and lower sides of the top wall of the inner liner 11, the fixing member 64 can be removably fixed at the third mounting hole 118 on the top wall of the inner liner 11.

[0092] See also Figure 6 and Fig. 9 As shown, in some embodiments, a third assembly groove 103 that is recessed upward is provided on the top wall of the inner cavity 10, and a third mounting hole 118 is provided in the third assembly groove 103. When the fixing member 64 is inserted into the third mounting hole 118, the third limiting rib 641 can be engaged in the third assembly groove 103, and the bottom end surface of the fixing member 64 is flush with the top surface of the inner cavity 10. Therefore, when the rotating shaft member 62 and the impeller 61 are removed from the fixing member 64, the top wall of the inner cavity 10 can be kept flat.

[0093] See also Figures 15 to 17As shown, in some embodiments, the impeller 61 includes a bottom plate 613 and a plurality of blades 611. The bottom plate 613 is arranged horizontally, and the bottom plate 613 is rotatably sleeved on the rotating shaft 62. The blades 611 are arranged to extend upward from the top surface of the bottom plate 613, and the plurality of blades 611 are arranged on the top surface of the bottom plate 613 and are arranged around the circumference of the rotating shaft 62 at intervals in the circumferential direction. Therefore, when the liquid in the first nozzle 41 is sprayed toward the impeller 61 through the first nozzle 411, the liquid can fall on the bottom plate 613 and the blades 611. At the same time, when the second nozzle 37 sprays steam toward the blades 611 of the impeller 61 through the second nozzle 371, the steam can push the blades 611 to rotate, and the blades 611 can drive the bottom plate 613 to rotate on the rotating shaft 62. When the impeller 61 rotates, the liquid on the impeller 61 can flow around along the bottom plate 613 and the blades 611, and be thrown out from the peripheral edges of the bottom plate 613, as well as from the peripheral edges and top edges of the blades 611, and sprinkle onto the inner walls of the inner cavity 10, thereby improving the cleaning effect of the inner walls of the inner cavity 10.

[0094] In some embodiments, the fan blades 611 are plate-shaped and extend vertically upward from the top surface of the bottom plate 613 , and the fan blades 611 extend outward along the radial direction of the impeller 61 .

[0095] See also Fig.17 As shown, in some embodiments, the peripheral edge of the bottom plate 613 is provided with an outwardly extending extension portion 6131, and a plurality of extension portions 6131 are provided, and the plurality of extension portions 6131 are circumferentially spaced and arranged around the peripheral edge of the bottom plate 613. The fan blade 611 is arranged to extend upward from one side edge of the extension portion 6131.

[0096] In some embodiments, a notch 614 is formed between adjacent extensions 6131. ​​When the impeller rotates, the liquid on the impeller 61 can flow around along the bottom plate 613 and fall from the notch 614 into the inner cavity 10 below the impeller 61.

[0097] In some embodiments, a plurality of convex ribs 6132 are convexly disposed on the bottom plate 613, and the convex ribs 6132 extend in the radial direction of the bottom plate 613, and the plurality of convex ribs 6132 are arranged at intervals in the circumferential direction. When the impeller rotates, the liquid on the impeller 61 can be thrown toward the inner wall of the inner cavity 10 under the obstruction of the convex ribs 6132, thereby improving the uniformity of the impeller 61 spraying.

[0098] 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; an impeller rotatably disposed in the inner cavity; A first spray head, whose outlet end forms a first nozzle, the first nozzle is arranged in the inner cavity and arranged toward the impeller; the inlet end of the first spray head is connected to the liquid through a first pipeline; A second nozzle, whose outlet end forms a second nozzle, and the second nozzle is arranged in the inner cavity and arranged toward the blades of the impeller; A steam generator, wherein the outlet end of the steam generator is connected to the inlet end of the second nozzle through a second pipeline; Wherein, the liquid can be introduced into the first nozzle through the first pipeline and sprayed into the impeller through the first nozzle; At the same time, the steam generator can generate steam, and introduce the steam into the second nozzle through the second pipeline, and spray it onto the blades of the impeller through the second nozzle, driving the impeller to rotate, and through the rotation of the impeller, liquid is sprinkled onto the inner wall of the inner cavity to clean the inner wall of the inner cavity.

2. The household appliance according to claim 1, characterized in that: The household appliance further comprises a circulation pump, a drain port is provided at the bottom of the inner cavity, a water inlet of the circulation pump is connected to the drain port, and a water outlet of the circulation pump is connected to an inlet of the first nozzle through the first pipeline; The circulation pump can extract the liquid in the inner cavity, introduce it into the first nozzle through the first pipeline, and spray it into the impeller through the first nozzle to circulate and clean the inner wall of the inner cavity.

3. The household appliance according to claim 2, characterized in that: The household appliance further comprises a sewage box, and the water outlet end of the circulation pump is also connected to the sewage box through a third pipeline; After the circulation cleaning is completed, the circulation pump can extract the liquid in the inner cavity and pump the liquid into the sewage box through the third pipeline.

4. The household appliance according to claim 3, characterized in that: The first pipeline is provided with a first switch valve, and the first switch valve is used to open and close the first pipeline; the third pipeline is provided with a second switch valve, and the second switch valve is used to open and close the third pipeline.

5. The household appliance according to claim 4, characterized in that: The household appliance further comprises a controller, and the first switch valve and the second switch valve are respectively connected to the controller; The controller can control the first switch valve to open the first pipeline, and control the second switch valve to close the third pipeline, and the circulation pump can spray the extracted liquid to the impeller through the first pipeline and the first nozzle; The controller can control the first switch valve to close the first pipeline, and control the second switch valve to open the third pipeline. The circulation pump can transport the extracted liquid into the sewage box through the third pipeline.

6. The household appliance according to claim 1, characterized in that: A clean water box for storing clean water is provided in the box body, the clean water box is connected with the inlet end of the steam generator through a water inlet pipeline, and a water pump is provided on the water inlet pipeline; the water pump can pump the water in the clean water box into the steam generator.

7. The household appliance according to claim 1, characterized in that: The outlet end of the steam generator is also connected to one end of a fourth pipeline, and the other end of the fourth pipeline extends into the inner cavity and is communicated with the inner cavity.

8. The household appliance according to claim 7, characterized in that: The second pipeline is provided with a third switch valve, and the third switch valve is used to open and close the second pipeline; the fourth pipeline is provided with a fourth switch valve, and the fourth switch valve is used to open and close the fourth pipeline.

9. The household appliance according to claim 1, characterized in that: A water collecting tank is arranged at the bottom of the inner cavity, and a turbidity sensor is arranged in the water collecting tank. The turbidity sensor is used to detect the turbidity value of the liquid in the water collecting tank.

10. The household appliance according to claim 2, characterized in that: The drain port is connected to the water pumping end of the circulation pump through a drain pipe; The drain outlet is covered with a filter cover, and the filter cover is densely covered with filter holes.

11. The household appliance according to claim 1, characterized in that: A first limiting rib is convexly disposed on the outer wall of the first nozzle, and the first limiting rib is annular and arranged around the outer peripheral wall of the first nozzle; A first external thread is provided on the outer peripheral wall of the first nozzle, and the first external thread is provided above the first limiting rib; A first mounting hole is opened on the top wall of the inner cavity, and the first nozzle is inserted into the first mounting hole; and when the first nozzle is inserted into the first mounting hole, the first limiting rib can abut against the top wall of the inner cavity, and the first external thread is arranged above the first mounting hole.

12. The household appliance according to claim 11, characterized in that: A first assembly groove which is recessed upward is provided on the top wall of the inner cavity, and the first mounting hole is opened in the first assembly groove; When the first nozzle is inserted into the first mounting hole, the first limiting rib can be embedded in the first assembly groove, and the bottom end surface of the first nozzle is flush with the top surface of the inner cavity.

13. The household appliance according to claim 1, characterized in that: The second nozzle extends vertically, and a spray portion is provided at the bottom end of the second nozzle, which is bent and extended toward the impeller, and an outlet of the spray portion forms the second nozzle; the top end of the second nozzle extends out of the inner cavity to communicate with the second pipeline.

14. The household appliance according to claim 13, characterized in that: A second limiting rib is convexly provided on the outer wall of the second nozzle, the second limiting rib is annular and arranged around the outer peripheral wall of the second nozzle; the injection portion is arranged below the second limiting rib; A second external thread is provided on the outer peripheral wall of the second nozzle, and the second external thread is provided above the second limiting rib; A second mounting hole is opened on the top wall of the inner cavity, and the second nozzle is inserted into the second mounting hole; and when the second nozzle is inserted into the second mounting hole, the second limiting rib can abut against the top wall of the inner cavity, and the second external thread is arranged above the second mounting hole.

15. The household appliance according to claim 14, characterized in that: A second assembly groove which is recessed upward is provided on the top wall of the inner cavity, and the second mounting hole is opened in the second assembly groove; When the second nozzle is inserted into the second mounting hole, the second limiting rib can be embedded in the second assembly groove, and the bottom end surface of the second limiting rib is flush with the top surface of the inner cavity.

16. The household appliance according to claim 1, characterized in that: A rotating shaft is arranged in the inner cavity. The rotating shaft is rod-shaped and extends in the up-down direction. The top end of the rotating shaft is detachably fixed on the top wall of the inner cavity. The impeller is rotatably sleeved on the rotating shaft.

17. The household appliance according to claim 16, characterized in that: A limiting sleeve is provided at the bottom end of the rotating shaft, and the limiting sleeve is detachably sleeved on the bottom end of the rotating shaft, and the limiting sleeve abuts against the bottom of the impeller to limit the impeller to rotate on the rotating shaft.

18. 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; an impeller rotatably disposed in the inner cavity; a first nozzle, whose outlet end forms a first nozzle, and the first nozzle is arranged in the inner cavity and arranged toward the impeller; A circulation pump, wherein a water inlet end of the circulation pump is connected to the drain port, and a water outlet end of the circulation pump is connected to an inlet end of the first nozzle through a first pipeline; A second nozzle, whose outlet end forms a second nozzle, and the second nozzle is arranged in the inner cavity and arranged toward the blades of the impeller; A steam generator, wherein the outlet end of the steam generator is connected to the inlet end of the second nozzle through a second pipeline; A clean water box, the clean water box is connected to the inlet end of the steam generator through a water inlet pipeline, and a water pump is provided on the water inlet pipeline; A sewage box is connected to the water outlet of the circulation pump through a third pipeline; A controller, signal-connected to the circulation pump, the water pump and the steam generator respectively; Wherein, the controller is capable of controlling the circulation pump to extract the liquid in the inner cavity and spray it into the impeller through the first pipeline and the second nozzle; At the same time, the controller can control the water pump to pump the clean water in the clean water box into the steam generator to form steam, and introduce the steam into the second nozzle through the second pipeline, and spray it onto the blades of the impeller through the second nozzle, so as to drive the impeller to rotate, and through the rotation of the impeller, the liquid is sprayed onto the inner wall of the inner cavity, so as to circulate and clean the inner wall of the inner cavity; After the circulation cleaning is completed, the controller can control the circulation pump to extract the liquid in the inner cavity and pump the liquid into the sewage box through the third pipeline.

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