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; the impeller is rotatably arranged in the inner cavity; the outlet end of the sprayer forms a nozzle and faces the fan blades of the impeller, and the inlet end of the sprayer is connected with liquid through a first pipeline; the steam generator is communicated with the spray head through a second pipeline; the liquid is sprayed to the fan blades of the impeller through the first pipeline and the nozzle to drive the impeller to rotate, and the liquid is sprayed to the inner wall of the inner cavity through rotation of the impeller so as to clean the inner wall of the inner cavity; and meanwhile, the steam generator can guide steam into the spray head through the second pipeline, so that liquid in the spray head can be sprayed to fan blades of the impeller under the action of steam pressure, the rotating speed of the impeller can be increased, the liquid spraying uniformity and efficiency of the impeller can be improved, and the function of cleaning the interior of the inner cavity of the household appliance can be achieved.

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 nozzle, whose outlet end forms a nozzle, the nozzle extends into and is arranged in the inner cavity and is arranged toward the blades of the impeller, and the inlet end of the nozzle is connected with liquid through a first pipeline; a steam generator, the outlet end of the steam generator is connected to the inlet end of the nozzle through a second pipeline; wherein the liquid can be introduced into the nozzle through the first pipeline, and sprayed toward the blades of the impeller through the nozzle, driving the impeller to rotate, and the liquid is sprinkled onto the inner wall of the inner cavity through the rotation of the impeller to clean the inner wall of the inner cavity; during the cleaning process, the steam generator can generate steam, and introduce the steam into the nozzle through the second pipeline, so that the liquid in the nozzle can be sprayed toward the blades of the impeller under the action of the steam pressure.

[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 nozzle, whose outlet end forms a nozzle, and the nozzle extends into and is arranged in the inner cavity and is arranged toward the fan blades of the impeller; a circulating pump, the water inlet end of the circulating pump is connected to the drain outlet, and the water outlet end of the circulating pump is connected to the inlet end of the nozzle through a first pipeline; a steam generator, the outlet end of the steam generator is connected to the inlet end of the 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 end of the circulating pump through a third pipeline ; A controller, which is signal-connected to the circulation pump, the water pump and the steam generator respectively; wherein the controller can control the circulation pump to extract water in the inner cavity, and spray it to the blades of the impeller through the first pipeline and the nozzle, drive the impeller to rotate, and sprinkle the liquid to the inner wall of the inner cavity through the rotation of the impeller, so as to circulate and clean the inner wall of the inner cavity; during the circulation cleaning process, 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 nozzle through the second pipeline, so that the liquid in the nozzle can be sprayed to the blades of the impeller under the action of the steam pressure; after the circulation cleaning is completed, the controller can control the circulation pump to extract the sewage in the inner cavity, and pump the sewage 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 nozzle and a rotatable impeller are arranged in the inner cavity of the casing, and the outlet end of the nozzle forms a nozzle and is arranged toward the blades of the impeller; the liquid is sprayed toward the blades of the impeller by using the first pipeline and the nozzle of the nozzle, and the sprayed liquid forms power and drives the impeller to rotate. Through the rotation of the impeller, the liquid falling on the impeller can be thrown to the surroundings and then sprinkled on the inner walls of the inner cavity to clean the inner wall of the inner cavity; during the cleaning process, the steam generator is used to generate steam and form power, and the steam can be introduced into the nozzle through the second pipeline, so that the liquid in the nozzle can be sprayed toward the blades of the impeller under the action of the steam pressure, thereby increasing the rotation speed of the impeller, improving the uniformity and spraying efficiency of the impeller spraying liquid, so as to realize the cleaning function of the inner cavity of the household appliance, and effectively solve 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 middle nozzle, the first pipeline and the second pipeline.

[0022] Fig.13 yes Fig.12 Schematic diagram of the decomposition.

[0023] Fig.14 yes Fig.13 Schematic diagram of the structure of the middle 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] Fig.18 yes Fig.17 Top view of the impeller.

[0028] Fig.19 yes Fig.17 A schematic structural diagram of the middle impeller in another embodiment.

[0029] The reference numerals are as follows: 1. box body; 10. inner cavity; 101. first assembly groove; 102. second assembly groove; 11. liner; 111. heating device; 113. water collecting tank; 114. drain outlet; 115. filter cover; 116. first mounting hole; 117. second 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; 362. pressure force sensor; 41, nozzle; 4101, first pipe section; 4102, second pipe section; 411, nozzle; 412, injection part; 413, first limiting rib; 414, first external thread; 42, circulation pump; 43, sewage box; 44, first pipeline; 441, first switch valve; 45, drain pipe; 46, third pipeline; 461, second switch valve; 47, three-way pipe; 5, controller; 61, impeller; 611, fan blade; 6111, step groove; 6112, water hole; 612, bushing; 6121, convex rib; 613, bottom plate; 62, rotating shaft; 63, limiting sleeve; 64, fixing part; 641, second limiting rib; 642, second external thread. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] See also Figures 1 to 6 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Figure 7 yes Figure 2 Top view of the . Figure 8 yes Figure 7 Middle BB section view.

[0042] See also Figures 3 to 8As 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 .

[0050] 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.

[0051] 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.

[0052] 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.

[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, 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 .

[0055] 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.

[0056] See also Figures 3 to 10 As shown, in some embodiments, the cleaning system further includes a nozzle 41, a circulation pump 42 and a sewage box 43. The nozzle 41 is arranged inside the inner cavity 10, and a nozzle 411 is formed at the water outlet end of the nozzle 41. The circulation pump 42 is arranged in the box body 1 and outside the inner tank 11. 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 nozzle 41. At the same time, a water collecting tank 113 is provided in the center concave at the bottom 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 water from the inner cavity 10, and introduce it into the interior of the nozzle 41 through the first pipe 44, and then spray it into the inner cavity 10 through the nozzle 411 of the nozzle 41, thereby cleaning 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, thereby realizing the circulation cleaning of the inner wall of the inner cavity 10 and achieving the water cleaning function of the inner cavity 10.

[0057] 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 nozzle 411, thereby effectively improving the cleaning effect of the inner cavity 10.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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 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.

[0062] 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.

[0063] See also Figures 2 to 8As 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.

[0064] 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.

[0065] 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 nozzle 41 through the first pipeline 44, and sprayed into the inner cavity 10 through the nozzle 411 of the 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.

[0066] 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.

[0067] 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.

[0068] Fig.11 yes Fig. 9 Schematic diagram of some structures in . Fig.12 yes Fig.11 Schematic diagram of the structure of the middle nozzle 41, the first pipeline 44 and the second pipeline 36.

[0069] See also Figures 3 to 12 As shown, in some embodiments, the cleaning system further comprises a second pipeline 36, a first end of the second pipeline 36 is connected to the nozzle 41, and a second end of the second pipeline 36 is connected to the outlet end of the steam generator 34. Therefore, when the circulation pump 42 extracts the liquid in the inner cavity 10 and introduces it into the nozzle 41 through the first pipeline 44, the inner wall of the inner cavity 10 is circulated and cleaned through the nozzle 411 of the nozzle 41. In the cyclic cleaning process, the water pump 33 can pump 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 nozzle 41 through the second pipeline 36, and the pressure of the steam is used to form power, so that the liquid in the nozzle 41, that is, the mixture of water and detergent, can be sprayed into the inner cavity 10 through the nozzle 411 under the action of the steam pressure, thereby improving the spraying speed and spraying efficiency, and thus improving the cleaning effect on the inner wall of the inner cavity 10.

[0070] 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 nozzle 41 through the second pipeline 36, and the pressure of the steam is used to form power, so that the liquid in the nozzle 41 can be sprayed into the inner cavity 10 through the nozzle 411 under the action of the steam pressure, thereby improving the cleaning effect on the inner wall of the inner cavity 10.

[0071] It should be noted that, in some embodiments thereof, the water pump 33 can be controlled by the controller 5 to extract the water in the clean water box 31 and transport it into the steam generator 34 for heating. The hot water formed by heating can be transported into the nozzle 41 through the second pipeline 36, and the hot water is sprayed into the inner cavity 10 by the nozzle 411 of the nozzle 41, and the inner wall of the inner cavity 10 is washed with hot water, thereby improving the cleaning effect of the inner wall of the inner cavity 10. Alternatively, the water pump 33 can be controlled by the controller 5 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 nozzle 41 through the second pipeline 36, and the steam is sprayed into the inner cavity 10 by the nozzle 411 of the nozzle 41, and the inner wall of the inner cavity 10 is steam-cleaned, thereby improving the cleaning effect of the inner wall of the inner cavity 10.

[0072] In some embodiments, a pressure sensor 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 by 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 maintaining the pressure values ​​in the nozzle 41, the first pipeline 44 and the second pipeline 36 within a safe range, ensuring the normal and safe operation of the cleaning system.

[0073] See also Figures 4 to 11 As 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 nozzle 411 of the nozzle 41. The impeller 61 has a plurality of blades 611, and the nozzle 411 of the nozzle 41 is arranged toward the blades 611 of the impeller 61. When the liquid in the nozzle 41 can be sprayed toward the blades 611 of the impeller 61 through the nozzle 411, a driving force is formed to drive the impeller 61 to rotate in the inner cavity 10; at the same time, the liquid falling on the impeller 61 is thrown around by the rotation of the impeller 61, and is sprinkled from the peripheral side of the impeller 61 to the inner wall of the inner cavity 10, so that the liquid in the nozzle 41 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.

[0074] In some embodiments, when the circulation pump 42 draws liquid from the inner cavity 10, introduces it into the nozzle 41 through the first pipe 44, and sprays it onto the blades 611 of the impeller 61 through the nozzle 411, the water pump 33 can draw water from the clean water box 31 into the steam generator 34 for heating, and the steam generated by the heating can be introduced into the nozzle 41 through the second pipe 36. The pressure of the steam is used to generate power so that the liquid in the nozzle 41 is sprayed onto the blades 611 of the impeller 61 at a high speed, so that the impeller 61 has sufficient power to rotate, thereby improving the rotation efficiency of the impeller 61, and then improving the uniformity of the liquid spraying, thereby improving the cleaning effect on the inner wall of the inner cavity 10.

[0075] Fig.13 yes Fig.12 Schematic diagram of the decomposition.

[0076] See also Figures 9 to 13 As shown, in some embodiments, the inlet end of the nozzle 41 is provided with a three-way pipe 47, and the three-way pipe 47 is arranged above the top of the inner tank 11. The three-way pipe 47 has a first pipe opening, a second pipe opening and a third pipe opening. The end of the first pipeline 44 away from the circulation pump 42 is connected to the first pipe opening of the three-way pipe 47, the end of the second pipeline 36 away from the steam generator 34 is connected to the second pipe opening of the three-way pipe 47, and the inlet end of the nozzle 41 is connected to the third pipe opening of the three-way pipe 47. Therefore, the circulation pump 42 extracts water in the inner cavity 10, which can be introduced into the nozzle 41 through the first pipeline 44 and the three-way pipe 47 in sequence. 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 nozzle 41 through the second pipeline 36 and the three-way valve in sequence.

[0077] Fig.14 yes Fig.13 A schematic structural diagram of the middle nozzle 41.

[0078] See also Figure 6 and Fig.14 As shown, in some embodiments, the nozzle 41 extends vertically, and the top of the nozzle 41 extends out of the inner cavity 10, that is, the top of the nozzle 41 protrudes out of the outer wall of the top of the inner tank 11, and the top of the nozzle 41 forms the inlet end of the nozzle 41, and is respectively connected to the first pipeline 44 and the second pipeline 36. The bottom end of the nozzle 41 is provided with a spraying portion 412 that bends and extends toward the impeller 61, and the outlet of the spraying portion 412 faces the blade 611 of the impeller 61 and forms a nozzle 411. When the nozzle 411 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 412 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.

[0079] In some embodiments, a first limiting rib 413 is convexly provided on the outer wall of the nozzle 41, and the first limiting rib 413 is annular and arranged around the outer peripheral wall of the nozzle 41, and the injection portion 412 is arranged below the first limiting rib 413. A first external thread 414 is provided on the outer peripheral wall of the nozzle 41, and the first external thread 414 is arranged above the first limiting rib 413. At the same time, a first mounting hole 116 matching with the nozzle 41 is opened on the top wall of the inner cavity 10, and the 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 arranged 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 a nut (not shown in the figure) on the nozzle 41, the nut 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 nozzle 41 can be fixedly installed at the first mounting hole 116 on the top wall of the inner liner 11.

[0080] See also Figure 6 As 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 a first mounting hole 116 is provided in the first assembly groove 101. When the 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 bottom end surface of the first limiting rib 413 is flush with the top surface of the inner cavity 10.

[0081] See also Fig.14 As shown, in some embodiments, the nozzle 41 includes a first pipe section 4101 and a second pipe section 4102 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 4101, and the first pipe section 4101 can be extended upward by the first limiting rib 413, and the second pipe section 4102 can be extended downward by the first limiting rib 413. The injection portion 412 is formed at the bottom end of the second pipe section 4102.

[0082] In some embodiments, the top end of the second pipe segment 4102 is detachably connected to the bottom end of the first pipe segment 4101. Specifically, the bottom end of the first pipe segment 4101 may be provided with an internal thread, the top end of the second pipe segment 4102 may be provided with an external thread, and the top end of the second pipe segment 4102 may be threadedly connected to the bottom end of the first pipe segment 4101. Therefore, when the nozzle 41 is not needed to clean the inner wall of the inner cavity 10, the second pipe segment 4102 of the nozzle 41 may be separated from the first pipe segment 4101, and the second pipe segment 4102 may be taken out of the inner cavity 10. At the same time, the bottom end of the first pipe segment 4101 and the first limiting rib 413 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.

[0083] 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.

[0084] 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 mounted on the rotating shaft 62. Therefore, when the liquid in the spray head 41 is sprayed toward the blades 611 of the impeller 61 through the nozzle 411, the impeller 61 can rotate around the rotating shaft 62.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] In some embodiments, the fixing member 64 is detachably fixed on the top wall of the inner cavity 10. Specifically, a second limiting rib 641 is convexly provided on the outer peripheral wall of the bottom end of the fixing member 64, and the second limiting rib 641 is annular and arranged around the outer peripheral wall of the bottom end of the fixing member 64. A second external thread 642 is provided on the outer peripheral wall of the fixing member 64, and the second external thread 642 is arranged above the second limiting rib 641. At the same time, a second mounting hole 117 is provided on the top wall of the inner cavity 10, and the fixing member 64 is penetrated at the second mounting hole 117. When the fixing member 64 is penetrated at the second mounting hole 117, the second limiting rib 641 can abut against the top wall of the inner cavity 10, and the second external thread 642 extends out of the inner cavity 10 and is arranged above the second mounting hole 117, that is, the second 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 second external thread 642, and the nut is located above the top of the inner liner 11. By fixing the nut and the second 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 second mounting hole 117 on the top wall of the inner liner 11.

[0089] See also Figure 6 and Fig. 9 As shown, in some embodiments, a second assembly groove 102 that is recessed upward is provided on the top wall of the inner cavity 10, and a second mounting hole 117 is provided in the second assembly groove 102. When the fixing member 64 is inserted into the second mounting hole 117, the second limiting rib 641 can be engaged in the second assembly groove 102, 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.

[0090] See also Figures 15 to 17 As shown, in some embodiments, the impeller 61 includes a sleeve 612, a bottom plate 613 and a plurality of blades 611. The bottom plate 613 is arranged horizontally, the sleeve 612 is arranged to extend upward along the top surface of the bottom plate 613, and the bottom plate 613 and the sleeve 612 are rotatably sleeved on the rotating shaft 62. The plurality of blades 611 are arranged around the circumferential side of the sleeve 612 at intervals in the circumferential direction, and the blades 611 extend upward obliquely from the top surface of the bottom plate 613. Therefore, when the liquid in the nozzle 41 is sprayed toward the blades 611 of the impeller 61 through the nozzle 411, the blades 611 can drive the bottom plate 613 and the shaft sleeve 612 to rotate on the rotating shaft 62, and when the impeller 61 rotates, the liquid on the impeller 61 can flow upward along the blades 611, and be thrown upward at an angle from the top side edge of the blades 611, and sprinkle onto the top wall of the inner cavity 10, thereby improving the cleaning effect on the top wall of the inner cavity 10.

[0091] In some embodiments, a step groove 6111 is recessed at the top edge of the blade 611, and the step groove 6111 can form a plurality of edges with different heights at the top edge of the blade 611. Therefore, when the impeller 61 rotates, the liquid on the impeller 61 can flow upward along the blade 611 and be sprayed onto the top wall or side wall of the inner cavity 10 from different edges of the top side of the blade 611, thereby improving the uniformity of the liquid sprayed onto the inner wall of the inner cavity 10.

[0092] In some embodiments, an angle α is formed between the extension direction of the fan blade 611 and the vertical direction, and the angle α ranges from 5° to 45°. The best effect is achieved when the angle α is 30°.

[0093] It should be noted that the number and spacing of the fan blades 611 can be adjusted as needed and are not limited here.

[0094] Fig.18 yes Fig.17 Top view of the impeller.

[0095] See also Figures 15 to 18 As shown, in some embodiments, a convex rib 6121 is convexly provided on the inner wall of the shaft sleeve 612, and the convex rib 6121 is arranged on the inner wall of the shaft sleeve 612 in an axially extending manner. A plurality of convex ribs 6121 are provided, and the plurality of convex ribs 6121 are arranged around the inner wall of the shaft sleeve 612 in a circumferentially spaced manner. When the impeller 61 is sleeved on the rotating shaft 62 through the shaft sleeve 612, the convex rib 6121 can abut against the outer wall of the rotating shaft 62, reducing the contact area between the inner wall of the shaft sleeve 612 and the outer wall of the rotating shaft 62, and then when the impeller 61 rotates on the rotating shaft 62, the convex rib 6121 can reduce the friction between the impeller 61 and the rotating shaft 62, so that the impeller 61 can smoothly rotate on the rotating shaft 62.

[0096] In some embodiments, the bottom end of the rib 6121 extends to the bottom of the impeller 61, and the bottom end of the rib 6121 protrudes from the bottom surface of the bottom plate 613 and forms a convex point (not shown in the figure). The convex point is used to abut against the top surface of the limiting sleeve 63. The convex point can reduce the friction between the bottom surface of the bottom plate 613 and the top surface of the limiting sleeve 63, thereby allowing the impeller 61 to smoothly rotate relative to the limiting sleeve 63.

[0097] Fig.19 yes Fig.17 A schematic structural diagram of the middle impeller 61 in another embodiment.

[0098] See also Figures 15 to 19As shown, in some embodiments, a water hole 6112 is provided on the blade 611 of the impeller 61, and the water hole 6112 penetrates the blade 611 to connect the two sides of the blade 611. Therefore, when the impeller 61 rotates, the liquid between the blades 611 on the impeller 61 can pass through the water hole 6112 into the area between the adjacent blades 611, thereby making the liquid between the blades 611 on the impeller 61 evenly distributed, and improving the uniformity of liquid spraying when the impeller 61 rotates.

[0099] It should be noted that, in some embodiments, a plurality of water holes 6112 may be provided, and the number of water holes 6112 may be adjusted as needed, which is not limited here.

[0100] 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, It is 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 spray head, the outlet end of which forms a nozzle, the nozzle extends into the inner cavity and is arranged toward the blades of the impeller; the inlet end of the spray head is connected to the liquid through a first pipeline; A steam generator, wherein the outlet end of the steam generator is connected to the inlet end of the nozzle through a second pipeline; Wherein, the liquid can be introduced into the nozzle through the first pipeline and sprayed toward the blades of the impeller through the nozzle to drive the impeller to rotate, and the liquid is sprayed onto the inner wall of the inner cavity through the rotation of the impeller to clean the inner wall of the inner cavity; During the cleaning process, the steam generator can generate steam and introduce the steam into the nozzle through the second pipeline, so that the liquid in the nozzle can be sprayed toward the blades of the impeller under the action of the steam pressure.

2. The household appliance according to claim 1, It is characterized in that The household appliance comprises a circulation pump, a drain port is recessed 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 nozzle through the first pipeline; The circulation pump can extract the liquid in the inner cavity, introduce it into the spray head through the first pipeline, and spray it into the impeller through the nozzle, so as to circulate and clean the inner wall of the inner cavity.

3. The household appliance according to claim 2, It is 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 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, It is 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, It is 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 by signal; 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 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, It is 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, It is 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, It is 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, It is characterized in that The second pipeline is provided with a pressure sensor, and the pressure sensor is used to detect the pressure value inside the second pipeline.

10. The household appliance according to claim 2, It is 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, It is characterized in that A three-way pipe is provided at the inlet end of the nozzle, the first pipeline is connected to the first pipe opening of the three-way pipe, the second pipeline is connected to the second pipe opening of the three-way pipe, and the inlet end of the nozzle is connected to the third pipe opening of the three-way pipe.

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

13. The household appliance according to claim 1, It is 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.

14. The household appliance according to claim 13, It is 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.

15. The household appliance according to claim 13, It is characterized in that The impeller comprises a shaft sleeve, a bottom plate and a plurality of blades; the shaft sleeve is arranged to extend upward along the top surface of the bottom plate; A plurality of the fan blades are circumferentially spaced and arranged around the circumference of the sleeve, and the fan blades extend obliquely upward from the top surface of the bottom plate; When the impeller rotates, the liquid on the impeller can flow upward along the blades and sprinkle toward the top wall of the inner cavity from the top side edge of the blades.

16. A household appliance, It is 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 spray head, the outlet end of which forms a nozzle, the nozzle extending into the inner cavity and arranged toward the blades of the impeller; A circulation pump, wherein the water inlet end of the circulation pump is connected to the bottom of the drain outlet, and the water outlet end of the circulation pump is connected to the inlet end of the nozzle through a first pipeline; A steam generator, wherein the outlet end of the steam generator is connected to the inlet end of the 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; The controller is capable of controlling the circulation pump to extract the liquid in the inner cavity and spray it toward the blades of the impeller through the first pipeline and the nozzle, driving the impeller to rotate, and the liquid is sprayed onto the inner wall of the inner cavity through the rotation of the impeller, so as to circulate and clean the inner wall of the inner cavity; During the cycle cleaning process, 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 nozzle through the second pipeline, so that the liquid in the nozzle can be sprayed toward the blades of the impeller under the action of the steam pressure; 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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