Household appliance and self-cleaning method

Abstract

The invention relates to a household appliance and a self-cleaning method. 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 spray head is arranged in the inner cavity, and spray holes are formed in the outer wall of the spray head; the water inlet end of the circulating pump is communicated with the water outlet, and the water outlet end is communicated with the nozzle through a first pipeline; the outlet end of the steam generator is communicated with the spray head through a second pipeline; the circulating pump can pump water in the inner cavity, the water is guided into the spray head through the first pipeline, and the inner wall of the inner cavity is circularly cleaned through the spray holes; in the circulating cleaning process, the steam generator can guide steam into the spray head through the second pipeline, so that liquid in the spray head can be sprayed into the inner cavity under the action of steam pressure, the function of automatically cleaning the interior of the inner cavity of the household appliance is achieved, and 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 and a self-cleaning method. Background Art

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

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

[0004] The object of the present invention is to provide a household appliance and a self-cleaning method 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 provided in the housing, and a drain outlet is provided at the bottom of the inner cavity; a nozzle is provided in the inner cavity, and a spray hole is provided on the outer wall of the nozzle; a circulation pump, wherein the water inlet end of the circulation pump is connected to the drain outlet, the water outlet end of the circulation pump is connected to one end of a first pipeline, and the other end of the first pipeline is connected to the nozzle; a steam generator, wherein the outlet end of the steam generator is connected to one end of a second pipeline, and the other end of the second pipeline is connected to the nozzle; wherein the circulation pump can extract liquid in the inner cavity and introduce it into the nozzle through the first pipeline, so as to circulate and clean the inner wall of the inner cavity through the spray hole; during the circulation 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 into the inner cavity 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; a nozzle is provided in the inner cavity, and a spray hole is provided on the outer wall of the nozzle; a circulating pump, the water inlet end of the circulating pump is connected to the drain outlet, the water outlet end of the circulating pump is connected to one end of a first pipeline, and the other end of the first pipeline is connected to the nozzle; a steam generator, the outlet end of the steam generator is connected to one end of a second pipeline, and the other end of the second pipeline is connected to the nozzle; 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 inlet end of the steam generator through a third pipeline. The water outlet end of the circulation pump; 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 the liquid in the inner cavity, and spray it into the inner cavity through the first pipeline and the injection hole, 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 into the inner cavity 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.

[0008] According to another aspect of the present invention, the present invention provides a self-cleaning method for a household appliance, the self-cleaning method comprising: receiving a self-cleaning instruction; in response to the self-cleaning instruction, controlling a circulation pump to extract water in an inner cavity, and spraying the water into the inner cavity through a first pipeline and a spray hole of a nozzle to circulate and clean the inner wall of the inner cavity; and after the circulated cleaning is completed, pumping the liquid in the inner cavity into a sewage box through a third pipeline; controlling a water pump to pump water in the clean water box into a steam generator for heating, and spraying the formed hot water into the inner cavity through a second pipeline and the spray hole of the nozzle to flush the inner wall of the inner cavity; and after the flushing is completed, pumping the liquid in the inner cavity into the sewage box through the third pipeline.

[0009] The embodiments of the present invention have the following positive effects:

[0010] In the household appliance of the embodiment of the present invention, a nozzle is arranged in the inner cavity inside the casing, and a drain outlet is provided at the bottom of the inner cavity; a circulating pump is used to draw water in the inner cavity and spray it into the inner cavity through a first pipeline and a spray hole of the nozzle, so as to circulate and clean the inner wall of the inner cavity; during the circulation cleaning process, a steam generator is used to generate steam and form power, and the steam can be introduced into the nozzle through a second pipeline, so that the liquid in the nozzle can be sprayed into the inner cavity under the action of the steam pressure, 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

[0011] Figure 1 It is a structural schematic diagram of a household appliance according to an embodiment of the present invention.

[0012] Figure 2 yes Figure 1 Schematic diagram of some of the internal structures.

[0013] Figure 3 yes Figure 2 Schematic diagram of the structure from another perspective.

[0014] Figure 4 yes Figure 3 Schematic diagram of the cleaning system.

[0015] Figure 5 yes Figure 2 Front view of .

[0016] Figure 6 yes Figure 5 AA section view.

[0017] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of area B in the middle.

[0018] Figure 8 yes Figure 6 Schematic diagram of the enlarged structure of the C area in the middle.

[0019] Fig. 9 yes Figure 8 Schematic diagram of some structures in .

[0020] Fig.10 yes Fig. 9 Schematic diagram of the decomposition.

[0021] Fig.11 yes Fig.10 A cross-sectional view of the nozzle and fixed pipe.

[0022] Fig.12 yes Fig.10 Schematic diagram of the nozzle structure.

[0023] Fig.13 yes Fig.12 Schematic diagram of the decomposition.

[0024] Fig.14 yes Fig.13 A cross-sectional view of .

[0025] Fig.15 yes Fig.12 Top view of the .

[0026] The reference numerals are as follows: 1. box body; 10. inner cavity; 101. assembly groove; 11. liner; 111. heating device; 112. heating fan; 113. water collecting tank; 114. drain outlet; 115. filter cover; 116. mounting hole; 12. door frame; 121. door seal; 13. cooling air duct; 131. cooling fan; 132. air guide cover; 14. supporting top plate; 15. supporting 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, the third switch valve; 362, the pressure sensor; 41, the nozzle; 410, the accommodating chamber; 411, the injection hole; 411a, the first injection hole; 411b, the second injection hole; 412, the connecting pipe; 413, the conical wall; 414, the bottom cover; 415, the rotating part; 416, the cylindrical wall; 42, the circulating 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; 47, the fixing pipe; 471, the limiting rib; 472, the external thread section; 48, the three-way pipe; 5, the controller. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] See also Figures 1 to 4 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.

[0034] 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 needed, and is not limited here.

[0035] 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.

[0036] See also Figures 1 to 4 As shown, an inner liner 11 is disposed in the box body 1, and an inner cavity 10 is formed in the inner liner 11. The front end of the inner liner 11 has an opening, and the front end opening of the inner liner 11 is connected to the interior of the inner cavity 10.

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

[0040] In some embodiments, the first edge of the door 2 is disposed at the bottom end thereof, that is, the bottom end of the door 2 is rotatably connected to the bottom area of ​​the front end of the housing 1 .

[0041] 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.

[0042] 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.

[0043] See also Figure 3 and Figure 4 As shown, in some embodiments, a heat dissipation duct 13 is provided in the box body 1, and the heat dissipation duct 13 is provided outside the inner liner 11. Specifically, the heat dissipation duct 13 can be provided in a cavity (not shown in the figure) formed between the inner liner 11 and the box body 1. The air inlet end of the heat dissipation duct 13 is connected to the cavity, and the air outlet end of the heat dissipation duct 13 is connected to the outside of the box body 1. At the same time, a heat dissipation fan 131 is provided in the heat dissipation duct 13, and the heat dissipation fan 131 is used to provide wind power, extract air in the cavity, and discharge the heat in the cavity to the outside of the box body 1 through the heat dissipation duct 13, so as to realize the heat dissipation function inside the box body 1.

[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 Figure 3 and Figure 4 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 plate of the box body 1, and the top of the support back plate 15 is connected to the rear end of the support top plate 14. The front end of the support top plate 14 is fixed on the front wall of the box body 1, so that the support top plate 14 can be stably fixed on the upper side of the inner liner 11.

[0048] 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 112 is provided at the rear side wall of the inner cavity 10, and the heating fan 112 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 allowing 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] Figure 5 yes Figure 2 Front view of . Figure 6 yes Figure 5 AA section view.

[0052] See also Figures 3 to 6 As shown, the cleaning system is arranged in the box 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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 .

[0057] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of area B in the middle.

[0058] See also Figures 3 to 7 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 spray hole 411 is arranged on the outer wall of the nozzle 41. The circulation pump 42 is arranged in the box body 1 and outside the inner tank 11. The circulation pump 42 can be a high-pressure pump. 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 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. 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 circulation 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 spray hole 411 of the nozzle 41, thereby cleaning the inner wall of the inner cavity 10. At the same time, the water sprayed onto the inner wall of the inner cavity 10 can flow downward along the wall into the sump 113, and be drawn out by the circulation pump 42 again, 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.

[0059] It should be noted that, during the cleaning process, the nozzle 41 is fixed in the inner cavity 10 and does not rotate.

[0060] See also Figures 4 to 7 As shown, in some embodiments, a accommodating chamber 410 is provided inside the nozzle 41, and a spray hole 411 connects the accommodating chamber 410 and the inner cavity 10. Before the cleaning operation, detergent can be pre-placed inside the nozzle 41. Therefore, when the circulation pump 42 draws water from the inner cavity 10 and introduces it into the nozzle 41, the detergent inside the nozzle 41 can be dissolved, the detergent and water are mixed, and sprayed onto the inner wall of the inner cavity 10 through the spray hole 411, thereby effectively improving the cleaning effect of the inner cavity 10.

[0061] It should be noted that, in other embodiments, before performing the cleaning operation, the detergent can also 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 through the water inlet pipe 32, the steam generator 34, and the fourth pipe 35 by the water pump 33, so as to dissolve the detergent and mix the detergent with water; then the mixture of water and detergent in the inner cavity 10 is extracted by the circulation pump 42 and sprayed onto the inner wall of the inner cavity 10 through the injection hole 411, thereby effectively improving the cleaning effect of the inner cavity 10.

[0062] In some embodiments, the sewage box 43 is disposed 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 pipe 46, and the second end of the third pipe 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 pipe 46, and transported to the sewage box 43 for collection.

[0063] 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.

[0064] 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.

[0065] The first switch valve 441 and the second switch valve 461 can both be solenoid valves.

[0066] 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 water 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.

[0067] 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.

[0068] See also Figures 3 to 7 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.

[0069] 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.

[0070] 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 water in the inner cavity 10, and the extracted water is transported into the nozzle 41 through the first pipeline 44, and sprayed into the inner cavity 10 through the spray hole 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 water 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.

[0071] Figure 8 yes Figure 6 Schematic diagram of the enlarged structure of the C area in the middle.

[0072] See also Figures 2 to 8 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 water 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 drain pipe 45, so as to prevent debris, particulate matter, etc. from entering the drain pipe 45 and clogging the circulation pump 42.

[0073] 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.

[0074] See also Figures 3 to 6As 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 water 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 spray hole 411 of the nozzle 41. In the circulation 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 spray hole 411 under the action of the steam pressure, thereby increasing the spray speed and spray range, and thus improving the cleaning effect on the inner wall of the inner cavity 10.

[0075] 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 injection hole 411 under the action of the steam pressure, thereby improving the cleaning effect on the inner wall of the inner cavity 10.

[0076] 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 spray hole 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 spray hole 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.

[0077] See also Figure 3 to Figure 4 As shown, in some embodiments, a pressure sensor 362 is provided on the second pipeline 36, and the pressure sensor 362 is used to detect the pressure value inside the second pipeline 36. The pressure sensor 362 is connected to the controller 5 by signal. Therefore, the pressure value inside the second pipeline 36 can be detected by the pressure sensor 362. 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 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.

[0078] Fig. 9 yes Figure 8 Schematic diagram of some structures in . Fig.10 yes Fig. 9 Schematic diagram of the decomposition. Fig.11 yes Fig.10 A cross-sectional view of the middle nozzle 41 and the fixed pipe 47.

[0079] See also Figures 4 to 11As shown, in some embodiments, a fixed pipe 47 is provided at the top of the inner cavity 10, and the fixed pipe 47 is arranged above the top of the inner tank 11. The fixed pipe 47 is arranged to extend vertically up and down, and the top of the fixed pipe 47 is respectively connected to the first pipeline 44 and the second pipeline 36, and the bottom end of the fixed pipe 47 extends into the inner cavity 10, and the nozzle 41 is detachably connected to the bottom port of the fixed pipe 47. Therefore, the first pipeline 44 and the second pipeline 36 can be respectively connected to the accommodating chamber 410 inside the nozzle 41 through the fixed pipe 47. Therefore, the circulating pump 42 can extract water in the inner cavity 10 and transport it to the accommodating chamber 410 inside the nozzle 41 through the first pipeline 44 and the fixed pipe 47. The steam generator 34 can transport steam to the accommodating chamber 410 inside the nozzle 41 through the second pipeline 36 and the fixed pipe 47.

[0080] In some embodiments, a tee pipe 48 is disposed at the top of the fixed pipe 47, the first pipe 44 is connected to the first pipe opening of the tee pipe 48, the second pipe 36 is connected to the second pipe opening of the tee pipe 48, and the top of the fixed pipe 47 is connected to the third pipe opening of the tee pipe 48. Therefore, the top of the fixed pipe 47 can be connected to the first pipe 44 and the second pipe 36 respectively.

[0081] See also Figures 7 to 11 As shown, in some embodiments, the nozzle 41 has a connecting pipe 412, one end of which is connected to the accommodating chamber 410, and the other end of the connecting pipe 412 is used to connect to a water source. Specifically, the connecting pipe 412 is formed at the top of the nozzle 41 and is extended upward. The top end of the connecting pipe 412 is detachably fixed to the bottom end of the fixed pipe 47, and then the connecting pipe 412 and the entire nozzle 41 are fixed to the top wall of the inner cavity 10. The bottom end of the connecting pipe 412 is connected to the accommodating chamber 410 in the nozzle 41, and the top end of the connecting pipe 412 is connected to the fixed pipe 47, so the accommodating chamber 410 in the nozzle 41 can be connected to an external water source and an air source through the connecting pipe 412 and the fixed pipe 47.

[0082] See also Figure 7 and Fig.11 As shown, in some embodiments, an external thread is provided on the outer wall of the top end of the connecting tube 412, and an internal thread is provided inside the bottom end of the fixing tube 47. The internal thread of the fixing tube 47 is adapted to the external thread of the connecting tube 412, so that the top end of the connecting tube 412 can be threadedly connected to the bottom end of the fixing tube 47, thereby making the nozzle 41 detachably fixed to the bottom end of the fixing tube 47 and detachably fixed in the inner cavity 10. Therefore, when the inner cavity 10 does not need to be cleaned, the connecting tube 412 can be separated from the fixing tube 47, thereby making the nozzle 41 able to be taken out from the inner cavity 10.

[0083] It should be noted that in other embodiments, an external thread may be provided on the outer peripheral wall of the bottom port of the fixed tube 47 , and an internal thread may be provided on the top of the connecting tube 412 , and then the top thread of the connecting tube 412 may be sleeved on the bottom end of the fixed tube 47 .

[0084] See also Figures 7 to 11 As shown, in some embodiments, a limiting rib 471 is convexly provided on the outer peripheral wall of the bottom end of the fixing tube 47, and the limiting rib 471 is annular and arranged around the outer peripheral wall of the bottom end of the fixing tube 47. At the same time, a mounting hole 116 matching with the fixing tube 47 is opened on the top wall of the inner cavity 10, and the bottom end of the fixing tube 47 is penetrated through the mounting hole 116, and the limiting rib 471 is attached to the top wall of the inner cavity 10, thereby limiting and fixing the fixing tube 47 on the top wall of the inner liner 11.

[0085] In some embodiments, an external thread section 472 is provided on the outer peripheral wall of the bottom end of the fixing tube 47, and a limiting rib 471 is provided below the external thread section 472. When the bottom end of the fixing tube 47 is inserted into the mounting hole 116, a nut (not shown in the figure) is sleeved on the fixing tube 47, and the nut is threadedly connected to the external thread section 472, and the nut is located above the top of the inner liner 11. By fixing the nut and the limiting rib 471 on the upper and lower sides of the top wall of the inner liner 11, the fixing tube 47 can be fixedly installed at the mounting hole 116 on the top wall of the inner liner 11.

[0086] In some embodiments, an upwardly extending assembly groove 101 is concavely provided on the top surface of the inner cavity 10, and the mounting hole 116 is provided in the assembly groove 101. When the bottom end of the fixing tube 47 is inserted into the mounting hole 116, the limiting rib 471 can be fitted into the assembly groove 101, and the bottom end surface of the fixing tube 47 is flush with the top surface of the inner cavity 10. Therefore, when the nozzle 41 is taken out of the inner cavity 10, the top wall of the inner cavity 10 can be kept flat.

[0087] Fig.12 yes Fig.10 Schematic diagram of the structure of the middle nozzle 41. Fig.13 yes Fig.12 Schematic diagram of the decomposition. Fig.14 yes Fig.13 A cross-sectional view of .

[0088] See also Figure 12 to Figure 14 As shown, in some embodiments, a plurality of spray holes 411 are provided, and the plurality of spray holes 411 are arranged around the outer wall of the spray head 41 at intervals. Therefore, the spray head 41 can spray water and detergent to each inner wall of the inner cavity 10 through the plurality of spray holes 411 at the same time, thereby improving the uniformity of the spraying and further improving the cleaning effect on the inner wall of the inner cavity 10.

[0089] In some embodiments, the injection hole 411 is an inclined hole. In the direction from the inside of the accommodating cavity 410 to the outside, the injection hole 411 is arranged upwardly and obliquely. Therefore, when the water and detergent in the accommodating cavity 410 are sprayed toward the inner wall of the inner cavity 10 through the injection hole 411, the water and detergent can be sprayed upwardly and obliquely onto the top wall and side wall of the inner cavity 10, and the water and detergent can flow from the top wall of the inner cavity 10 to the side wall of the inner cavity 10, thereby improving the cleaning effect on each inner wall of the inner cavity 10.

[0090] It should be noted that, since the heating device 111 is disposed in the top area of ​​the inner cavity 10, it is difficult to manually clean the top wall of the inner cavity 10. By the inclined design of the spray hole 411, the cleaning effect of the top wall of the inner cavity 10 can be effectively ensured.

[0091] See also Figure 12 to Figure 14 As shown, in some embodiments, the outer wall of the nozzle 41 has a conical wall 413. The conical wall 413 extends downward from the bottom end of the connecting tube 412 in a conical shape, and the outer diameter of the conical wall 413 gradually increases from top to bottom. The conical wall 413 is located in the top area of ​​the accommodating cavity 410, that is, the top area of ​​the accommodating cavity 410 forms a conical cavity.

[0092] In some embodiments, the tapered wall 413 has an angle α with the horizontal direction, and the angle α is between 30° and 60°. Fig.14 shown.

[0093] In some embodiments, the spray hole 411 is provided on the conical wall 413, and the spray hole 411 can be arranged perpendicular to the conical wall 413, so that the spray hole 411 can be arranged to extend obliquely upward, so that the water and detergent in the accommodating chamber 410 can be sprayed obliquely upward onto the top wall and side wall of the inner cavity 10. Specifically, in the direction from the inside of the accommodating chamber 410 of the spray head 41 to the outside, the spray hole 411 extends obliquely upward, and the spray hole 411 has an angle β with the vertical direction, and the angle β is between 30° and 60°, such as Fig.14 shown.

[0094] In some embodiments, a plurality of injection holes 411 are circumferentially spaced and arranged around the conical wall 413. It should be noted that in other embodiments, the injection holes 411 may also be provided on the peripheral side wall of the accommodating cavity 410 below the conical wall 413, or on the bottom wall of the accommodating cavity 410.

[0095] See also Figure 12 to Figure 14 As shown, in some embodiments, a cylindrical wall 416 is formed on the outer wall of the nozzle 41 , and the cylindrical wall 416 is arranged to extend downward in a circular ring shape from the bottom end of the conical wall 413 . The accommodating cavity 410 is formed inside the cylindrical wall 416 and the conical wall 413 .

[0096] Fig.15 yes Fig.12 Top view of the .

[0097] See also Figures 12 to 15 As shown, in some embodiments, the plurality of injection holes 411 on the conical wall 413 include a plurality of first injection holes 411a and a plurality of second injection holes 411b, the plurality of first injection holes 411a are uniformly spaced and arranged around the conical wall 413 in the circumferential direction, and the plurality of second injection holes 411b are uniformly spaced and arranged around the conical wall 413 in the circumferential direction. At the same time, the plurality of first injection holes 411a and the plurality of second injection holes 411b are spaced up and down, the plurality of first injection holes 411a and the plurality of second injection holes 411b are staggered, and the plurality of first injection holes 411a and the plurality of second injection holes 411b are staggered up and down, thereby improving the uniformity of spraying on the inner wall of the inner cavity 10.

[0098] See also Figure 12 to Figure 14 As shown, in some embodiments, the bottom of the accommodating chamber 410 is open, and a bottom cover 414 is provided at the bottom opening of the accommodating chamber 410. Specifically, the bottom cover 414 is detachably provided at the bottom of the nozzle 41, that is, provided at the bottom of the cylindrical wall 416. The bottom opening of the cylindrical wall 416 is the bottom opening of the accommodating chamber 410, and the bottom opening of the accommodating chamber 410 is covered by the bottom cover 414, and the accommodating chamber 410 is opened or closed by the bottom cover 414. Therefore, the detergent can be placed in the accommodating chamber 410 by opening the bottom cover 414, and then the bottom cover 414 is closed to encapsulate the detergent in the accommodating chamber 410.

[0099] It should be noted that the detergent can be a solid detergent block placed in the accommodating cavity 410. In other embodiments, the accommodating cavity 410 can also be open on the side wall or the top wall and covered by a cover body, so that liquid detergent can also be stored in the accommodating cavity 410.

[0100] In some embodiments, the outer peripheral wall of the bottom cover 414 is provided with external threads, and the bottom of the nozzle 41 is provided with internal threads, that is, the inner wall of the bottom of the accommodating cavity 410 is provided with internal threads. The bottom cover 414 is threadedly connected to the bottom of the nozzle 41.

[0101] It should be noted that, in other embodiments, the bottom cover 414 may also be provided with an internal thread, the bottom of the nozzle 41 may be provided with an external thread, and the bottom of the nozzle 41 may be threadedly sleeved on the bottom of the nozzle 41 .

[0102] See also Figure 12 to Figure 14 As shown, in some embodiments, a rotating portion 415 is convexly provided on the bottom surface of the bottom cover 414. The rotating portion 415 is convenient for the user to apply force, and then remove the bottom cover 414 from the nozzle 41 through the rotating portion 415, and then put the detergent into the accommodating cavity 410.

[0103] See also Figures 1 to 6 As shown, based on the solutions of the above embodiments, an embodiment of the present invention further provides a self-cleaning method for a household appliance, the self-cleaning method comprising:

[0104] Step S1: receiving a self-cleaning instruction. Specifically, the user autonomously activates the self-cleaning function, thereby generating a self-cleaning command, and the controller 5 can automatically receive the self-cleaning instruction. It should be noted that before the user activates the self-cleaning function, the user needs to first put a detergent into the water collection tank 113 of the inner cavity 10 or into the accommodating cavity 410 of the nozzle 41, and the detergent can be a solid or liquid detergent.

[0105] Step S2: In response to the self-cleaning instruction, the water pump 33 is controlled to transport clean water into the steam generator 34 for heating, and the heated hot water is introduced into the inner cavity 10, so that a certain amount of hot water is provided in the inner cavity 10. Specifically, the controller 5 can control the water pump 33 to pump water in the water inlet box into the steam generator 34 for heating, control the temperature of the steam generator 34, ensure that the water flowing through the steam generator 34 does not form steam, and then introduce the water into the inner cavity 10 through the fourth pipeline 35, so that a certain amount of hot water is provided in the water collection tank 113.

[0106] It should be noted that the water in the water collection tank 113 can dissolve the detergent put into the water collection tank 113. In addition, in some embodiments, the steam generator 34 may not heat the water flowing through the steam generator 34, so that the water collection tank 113 has a certain amount of room temperature water.

[0107] The circulating pump 42 is controlled to extract water from the inner cavity 10, and the water in the inner cavity 10 is sprayed into the inner cavity 10 through the first pipeline 44 and the spray hole 411 of the nozzle 41, so as to circulate and clean the inner wall of the inner cavity 10. Specifically, the controller 5 can open the first switch valve 441 and close the second switch valve 461, so that the first pipeline 44 is opened and the third pipeline 46 is closed, and at the same time, the circulating pump 42 is controlled to work, and the water in the inner cavity 10 is extracted and introduced into the accommodating cavity 410 of the nozzle 41 through the first pipeline 44, and then the mixture of water and detergent is sprayed onto each inner wall of the inner cavity 10 through the spray hole 411, and the mixture of water and detergent flows downward along the wall, automatically gathers in the water collection tank 113, and is again extracted by the circulating pump 42, so as to realize the circulated cleaning of the inner wall of the inner cavity 10, and realize the automatic cleaning of the inner wall of the inner cavity 10.

[0108] After the circulation cleaning is completed, the circulation pump 42 is controlled to extract the water in the inner cavity 10, and the water in the inner cavity 10 is pumped into the sewage box 43 through the third pipeline 46. Specifically, the controller 5 can close the first switch valve 441 and open the second switch valve 461, so that the first pipeline 44 is closed and the third pipeline 46 is opened, and at the same time, the circulation pump 42 is controlled to work, extract the sewage in the inner cavity 10, and then pump the sewage in the inner cavity 10 into the sewage box 43 through the third pipeline 46 for collection.

[0109] Step S3: Control the water pump 33 to pump the water in the clean water box 31 into the steam generator 34 for heating, and spray the formed hot water into the inner cavity 10 through the second pipeline 36 and the spray hole 411 of the nozzle 41 to wash the inner wall of the inner cavity 10. Specifically, the controller 5 can open the third switch valve 361 and close the fourth switch valve 351, so that the second pipeline 36 is opened and the fourth pipeline 35 is closed, and at the same time control the water pump 33 and the steam generator 34 to work, so that the water pump 33 draws the clean water in the clean water box 31 and transports it into the steam generator 34, and the hot water formed by the steam generator 34 is heated through the second pipeline 36 and introduced into the accommodating cavity 410 of the nozzle 41, and then the hot water is sprayed onto each inner wall of the inner cavity 10 through the spray hole 411 to wash each inner wall of the inner cavity 10.

[0110] After flushing is completed, the sewage in the inner cavity 10 is pumped into the sewage box 43 through the third pipeline 46. Specifically, the controller 5 can close the first switch valve 441 and open the second switch valve 461, so that the first pipeline 44 is closed and the third pipeline 46 is opened, and at the same time control the circulation pump 42 to work, extract the sewage in the inner cavity 10, and then pump the sewage in the inner cavity 10 into the sewage box 43 through the third pipeline 46 for collection.

[0111] Step S4: Repeat the above steps S2 and S3 to further improve the cleaning effect on the inner wall of the inner cavity 10, until the turbidity value of the water in the water collection tank 113 of the inner cavity 10 is less than the preset threshold value and the cycle stops. It should be noted that the turbidity value of the water in the water collection tank 113 of the inner cavity 10 is detected in real time by a turbidity sensor.

[0112] In some embodiments, after the preset time of cyclic cleaning, the turbidity value of the water in the inner cavity 10 is detected by a turbidity sensor, and the turbidity value detected in the inner cavity 10 is graded. According to the grade of the turbidity value detected in the inner cavity 10, the running time of the cyclic cleaning, the running time of the flushing, the washing water temperature and the water consumption are controlled. For example, the higher the turbidity value, the longer the running time of the cyclic cleaning and the running time of the flushing, the higher the washing water temperature and the greater the water consumption. As the cleaning and flushing cycles work, the turbidity value in the inner cavity 10 gradually decreases, and then the running time of the cyclic cleaning and the running time of the flushing can be controlled to be gradually shortened, until the turbidity value is less than the preset threshold value and the cycle stops.

[0113] For example, after the cleaning liquid has been circulated in the inner cavity 10 for a certain period of time, the turbidity value of the water in the inner cavity 10 is detected by the turbidity sensor. When the turbidity value is less than Q, the total cleaning time is set to 1.5 hours, the cycle cleaning operation time is 0.75 hours, the cycle flushing operation time is 0.75 hours, the flushing water volume is controlled at 2.5L, and the water output will be detected in the clean water box to control the water consumption, and the cleaning temperature is controlled between 40℃-50℃. When the turbidity value is greater than Q and less than 2Q, the total cleaning operation time is 2.5 hours, the cycle cleaning operation time is 1.5 hours, the cycle flushing operation time is 1 hour, the flushing water volume is controlled at 5L, and the cleaning temperature is controlled between 50℃-60℃. When the turbidity value is greater than 2Q, the total cleaning operation time is 4 hours, the cycle cleaning operation time is 2.5 hours, the cycle flushing operation time is 1.5 hours, the flushing water volume is controlled at 8L, and the cleaning temperature is controlled between 60℃-70℃.

[0114] In some embodiments, during the cyclic cleaning process of the above steps, the water pump 33 is controlled to pump the water in the clean water box 31 into the steam generator 34 for heating to form steam, and the steam is introduced into the nozzle 41 through the second pipeline 36, so that the steam carries the water in the nozzle 41 and sprays it into the inner cavity 10 through the spray hole 411. Then, the steam pressure forms a driving force, so that the liquid in the nozzle 41 can be sprayed into the inner cavity 10 through the spray hole 411 under the action of the steam pressure, thereby improving the spray range and spray efficiency, and thus improving the cleaning effect on the inner wall of the inner cavity 10.

[0115] In some embodiments, during the cyclic cleaning process of the above steps, the steam generator 34 is controlled to work periodically. In one working cycle T, the steam generator 34 is controlled to run for a first preset time period t1, then stop for a second preset time period t2, and enter the next working cycle T.

[0116] In some embodiments, during the cyclic cleaning process of the above steps, the pressure value in the second pipeline 36 is detected; the pressure value detected in the second pipeline 36 is graded into multiple level intervals of different pressure values; and the duration of the first preset time period t1 and the second preset time period t2 in the working cycle T is adjusted according to the interval corresponding to the level of the pressure value detected in the second pipeline 36. For example, the greater the pressure value, the shorter the duration of the first preset time period t1 and the longer the duration of the second preset time period t2, so as to avoid excessive pressure in the second pipeline 36 and the pressure inside the nozzle 41, thereby improving the safety of the equipment.

[0117] It should be noted that, in some embodiments, when the pressure value detected in the second pipeline 36 is less than the first preset pressure value, it means that the pressure in the second pipeline 36 and the pressure inside the nozzle 41 are within a safe range, and the second preset time period t2 can be adjusted to zero, that is, the steam generator 34 works continuously. When the pressure value detected in the second pipeline 36 is greater than the second preset pressure value, it means that the pressure in the second pipeline 36 and the pressure inside the nozzle 41 are too high, and the first preset time period t1 can be adjusted to zero, that is, the steam generator 34 stops working.

[0118] 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 box body, which forms the outer shell of the household appliance; the box body is provided with an inner cavity, and the bottom of the inner cavity is provided with a drainage port; A nozzle is arranged in the inner cavity, and a spray hole is arranged on the outer wall of the nozzle; A circulation pump, wherein a water inlet end of the circulation pump is connected to the drain port, a water outlet end of the circulation pump is connected to one end of a first pipeline, and the other end of the first pipeline is connected to the nozzle; A steam generator, wherein an outlet end of the steam generator is connected to one end of a second pipeline, and the other end of the second pipeline is connected to the nozzle; The circulating pump is capable of extracting liquid from the inner cavity and introducing the liquid into the nozzle through the first pipeline, so as to be sprayed into the inner cavity through the spray hole, so as to circulate and clean the inner wall of the inner cavity; During the cyclic 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 into the inner cavity under the action of the steam pressure.

2. The household appliance according to claim 1, characterized in that: The household appliance further comprises a sewage box, the water outlet end of the circulation pump is further connected to one end of a third pipeline, and the other end of the third pipeline is connected to the sewage box; 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.

3. The household appliance according to claim 2, 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.

4. The household appliance according to claim 3, 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 into the inner cavity through the first pipeline and the spray head; 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.

5. 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.

6. 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.

7. The household appliance according to claim 6, 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.

8. The household appliance according to claim 1, characterized in that: A turbidity sensor is arranged in the inner cavity, and the turbidity sensor is used to detect the turbidity value of the water in the inner cavity.

9. The household appliance according to claim 1, 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 1, characterized in that: A water collecting trough is recessed at the bottom of the inner cavity, the drain port is arranged at the bottom of the water collecting trough, and 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 fixed tube is provided at the top of the inner cavity, the top end of the fixed tube is respectively connected with the first pipeline and the second pipeline, and the bottom end of the fixed tube extends into the inner cavity; The nozzle is detachably connected to the bottom port of the fixed pipe.

12. The household appliance according to claim 11, characterized in that: A tee is provided at the top of the fixed pipe, the first pipeline is connected to the first pipe opening of the tee, the second pipeline is connected to the second pipe opening of the tee, and the top of the fixed pipe is connected to the third pipe opening of the tee.

13. The household appliance according to claim 1, characterized in that: A containing cavity is provided in the nozzle; the first pipeline and the second pipeline are respectively connected to the containing cavity; and the injection hole is connected to the containing cavity and the inner cavity.

14. The household appliance according to claim 13, characterized in that: In the direction from the inside of the accommodating cavity to the outside, the injection holes are arranged obliquely upward; There are a plurality of injection holes, which are arranged around the outer wall of the nozzle at intervals.

15. A household appliance, characterized in that: include: A box body, which forms the outer shell of the household appliance; the box body is provided with an inner cavity, and the bottom of the inner cavity is provided with a drainage port; A nozzle is arranged in the inner cavity, and a spray hole is arranged on the outer wall of the nozzle; A circulation pump, wherein a water inlet end of the circulation pump is connected to the drain port, a water outlet end of the circulation pump is connected to one end of a first pipeline, and the other end of the first pipeline is connected to the nozzle; A steam generator, wherein an outlet end of the steam generator is connected to one end of a second pipeline, and the other end of the second pipeline is connected to the nozzle; 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 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 can control the circulation pump to extract the liquid in the inner cavity and spray it into the inner cavity through the first pipeline and the spray hole, 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 draw 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 into the inner cavity 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.

16. A method for self-cleaning a household appliance as claimed in claim 15, characterized in that: The self-cleaning method comprises: receiving a self-cleaning instruction; In response to the self-cleaning instruction, the circulation pump is controlled to extract the liquid in the inner cavity and spray it into the inner cavity through the first pipeline and the spray hole of the spray head to circulate and clean the inner wall of the inner cavity; and after the circulatory cleaning is completed, the liquid in the inner cavity is pumped into the sewage box through the third pipeline; The water pump is controlled to draw the water in the clean water box into the steam generator for heating, and the hot water is sprayed into the inner cavity through the second pipeline and the spray hole of the nozzle to flush the inner wall of the inner cavity; and after the flushing is completed, the liquid in the inner cavity is drawn into the sewage box through the third pipeline.

17. The self-cleaning method according to claim 16, characterized in that: The self-cleaning method also includes: Detect the turbidity value of water in the inner cavity; The turbidity values ​​detected in the inner cavity are graded; The running time of the cycle cleaning and the running time of the flushing are controlled according to the level of the turbidity value detected in the inner cavity.

18. The self-cleaning method according to claim 16, characterized in that: The self-cleaning method also includes: During the circulation cleaning process, the water pump is controlled to draw water in the clean water box into the steam generator to heat it to form steam, and the steam is introduced into the nozzle through the second pipeline, so that the steam carries the water in the nozzle and sprays it into the inner cavity through the injection hole.

19. The self-cleaning method according to claim 18, characterized in that: The self-cleaning method also includes: During the cyclic cleaning process, the steam generator is controlled to work periodically. In one working cycle, the steam generator is controlled to run for a first preset time period, then stop for a second preset time period, and enter the next working cycle.

20. The self-cleaning method according to claim 19, characterized in that: The self-cleaning method also includes: During the cycle cleaning process, the pressure value in the second pipeline is detected; Classifying the pressure value detected in the second pipeline; According to the level of the pressure value detected in the second pipeline, the duration of the first preset time period and the second preset time period in the working cycle are adjusted.

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