Cleaning device

Abstract

The invention discloses cleaning equipment, and belongs to the field of household appliances. The cleaning equipment comprises an inner container, an air duct, a fan and a heater. A cleaning cavity is formed in the inner container; the air duct is provided with an air inlet and an air outlet which are communicated with the cleaning chamber; the fan is installed in the air duct, the fan and the air inlet are both located in the top wall of the inner container, a first cavity communicated with the air inlet and the air outlet and a second cavity isolated from the air inlet and the air outlet are formed in an upper shell of the fan, an impeller of the fan is installed in the first cavity, and the impeller of the fan is installed in the second cavity. A motor assembly of the fan is mounted in the second cavity; the heater is configured to heat gas in the air duct under the condition that the heater is started. Contact between water vapor and the stator and rotor assembly and the circuit board can be reduced, the reliability of the stator and rotor assembly and the circuit board of the fan is improved, and the service life of the fan is prolonged.

Description

Technical Field

[0001] This application belongs to the technical field of household appliances, and particularly relates to a cleaning device. Background Art

[0002] The drying methods of cleaning devices such as dishwashers include: condensation drying, hot air drying, adsorption drying, and quick drying by opening the door, etc. Among them, condensation drying has problems such as poor drying effect and long drying time, adsorption drying has problems such as high cost and peculiar smell after long-term storage, and quick drying by opening the door has problems such as easy entry of insects and moisture return due to failure to automatically close the door in a timely manner in humid areas. Therefore, considering the comprehensive cost and drying effect, hot air drying has become the method chosen by most manufacturers.

[0003] The working process of the hot air drying method is as follows: the fan sucks the external gas or the gas in the cleaning chamber into the air duct equipped with a heater. When the heater is turned on, it heats the gas flowing through the air duct, and the heated air is introduced into the cleaning chamber to perform hot air drying on the items in the cleaning chamber.

[0004] However, during the cleaning process of the cleaning device in the related art, the water flow in the cleaning chamber is easily splashed into the air duct, resulting in water ingress into the fan, affecting the normal operation of the fan, and there are serious safety hazards, which need to be improved. Summary of the Invention

[0005] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides a cleaning device, which can reduce the contact between water vapor and the stator-rotor assembly and the circuit board, improve the reliability of the stator-rotor assembly and the circuit board of the fan, and extend the service life of the fan.

[0006] In a first aspect, this application provides a cleaning device, including:

[0007] An inner container, forming a cleaning chamber;

[0008] An air duct, having an air inlet and an air outlet communicating with the cleaning chamber;

[0009] A fan, installed in the air duct. Both the fan and the air inlet are located on the top wall of the inner container. The upper shell of the fan forms a first chamber communicating with the air inlet and the air outlet and a second chamber isolated from the air inlet and the air outlet. The impeller of the fan is installed in the first chamber, and the motor assembly of the fan is installed in the second chamber;

[0010] A heater, configured to heat the gas in the air duct when turned on.

[0011] According to the cleaning equipment provided in the embodiment of the present application, on the first aspect, by setting internal circulation components such as an air duct, a fan and a heater, the air inlet and the air outlet of the air duct are connected to the cleaning chamber, and the gas in the cleaning chamber is sucked into the air duct from the air inlet of the air duct by the fan, and the hot air heated by the heater enters the cleaning chamber from the air outlet of the air duct, and the dry gas in the cleaning chamber is circulated and heated by the heater to achieve hot air drying of the tableware in the cleaning chamber. Compared with cleaning equipment that uses external circulation for hot air drying, the internal circulation drying working mode improves the utilization rate of hot air thermal energy, reduces the energy consumption of the hot air drying working mode of the cleaning equipment, and achieves energy saving; secondly, by arranging the impeller of the fan in the first cavity and installing the stator and rotor assembly and the circuit board of the motor assembly in the second cavity, the entry of water vapor into the second cavity can be reduced, thereby reducing the contact between water vapor and the stator and rotor assembly and the circuit board, improving the reliability of the stator and rotor assembly and the circuit board of the fan, extending the life of the fan, and reducing the interference and friction between the impeller and the stator and rotor assembly and the circuit board, which helps to improve the efficiency and life of the fan and facilitates the maintenance and inspection of the fan.

[0012] According to one embodiment of the present application, the bottom opening of the upper shell forms the air intake of the first cavity, a portion of the top surface of the upper shell is recessed downward to form the second cavity, and the rotating shaft of the motor assembly passes through the bottom surface of the second cavity.

[0013] According to one embodiment of the present application, the impeller is mounted on the rotating shaft via a threaded connection, and a sealing ring is provided on the portion of the rotating shaft extending out of the second cavity.

[0014] According to one embodiment of the present application, the rotating shaft is supported on the bottom surface of the second cavity and the top cover of the fan through bearings, the circuit board of the motor assembly is installed on the side of the top cover away from the stator and rotor assembly of the motor assembly, and the circuit board is connected to the top cover and the upper shell through sealant to close the top opening of the second cavity.

[0015] According to one embodiment of the present application, at least a portion of the upper shell is integrated with the air duct.

[0016] According to one embodiment of the present application, at least a portion of the bottom wall of the air duct from the area of the air inlet to the area of the air suction port of the first cavity gradually becomes higher.

[0017] According to one embodiment of the present application, the bottom shell of the air duct includes an air inlet section connected from the air inlet to the air intake of the first cavity, and at least a portion of the air inlet section gradually becomes higher in the direction from the air inlet to the air intake of the first cavity.

[0018] According to an embodiment of the present application, the air intake section is inclined relative to the top wall in the direction from the air inlet to the air suction port of the first chamber.

[0019] According to an embodiment of the present application, it further includes:

[0020] An exhaust air assembly, installed in the inner container, configured to discharge the gas in the cleaning chamber when it is turned on.

[0021] According to an embodiment of the present application, when the exhaust air assembly is working, the exhaust air volume of the exhaust air assembly is not less than the gas volume entering the cleaning chamber from the outside.

[0022] According to an embodiment of the present application, the air duct includes a makeup air branch. The makeup air inlet of the makeup air branch is communicated with the outside, and the makeup air outlet of the makeup air branch is communicated with the cleaning chamber. When the exhaust air assembly and the fan are working, the exhaust air volume of the exhaust air assembly is not less than the makeup air volume of the makeup air branch.

[0023] According to an embodiment of the present application, it further includes: a side plate. The heater is installed in the area of the air duct on the side of the inner container. The side plate is installed on the side of the inner container and covers at least part of the air duct. The inner side surface of the side plate is spaced apart from the air duct and the heater.

[0024] According to an embodiment of the present application, the power of the heater is P, satisfying: P ≤ 500W.

[0025] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. Description of the Drawings

[0026] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0027] Figure 1 is one of the structural schematic diagrams of the cleaning device provided by the embodiment of the present application;

[0028] Figure 2 is the second structural schematic diagram of the cleaning device provided by the embodiment of the present application;

[0029] Figure 3 is one of the structural schematic diagrams of the internal circulation assembly provided by the embodiment of the present application;

[0030] Figure 4 is the structural schematic diagram of the fan provided by the embodiment of the present application;

[0031] Figure 5This is the third structural diagram of the cleaning device provided in the embodiment of the present application;

[0032] Figure 6 This is the second structural diagram of the internal circulation component provided in the embodiment of the present application;

[0033] Figure 7 This is the fourth structural diagram of the cleaning device provided in the embodiment of the present application;

[0034] Figure 8 This is the fifth structural diagram of the cleaning device provided in the embodiment of the present application;

[0035] Figure 9 yes Figure 8 A partial enlarged view of point A in the middle;

[0036] Figure 10 This is the sixth structural diagram of the cleaning device provided in the embodiment of the present application;

[0037] Figure 11 This is the seventh structural diagram of the cleaning device provided in the embodiment of the present application;

[0038] Figure 12 This is the eighth structural diagram of the cleaning equipment provided in the embodiment of the present application.

[0039] Reference numerals:

[0040] Inner container 1, cleaning chamber 11, first side surface 111, second side surface 112; top wall 12, side wall 13, back plate 14, front opening 15, bottom wall 16;

[0041] Internal circulation component 2, air duct 21, air inlet 211, air outlet 212, air supply branch 213, air supply inlet 2131; bottom shell 210, grille 2156;

[0042] Fan 22, upper shell 221, first cavity 2211, air inlet 22111, second cavity 2212, impeller 222, motor assembly 223, rotating shaft 2231, bearing 2232, circuit board 2233, stator and rotor assembly 2234; top cover 224;

[0043] Heater 23, sealing device 25;

[0044] Side panel 3, exhaust assembly 4, air inlet 41, bowl basket 5. DETAILED DESCRIPTION

[0045] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0046] Reference will be made below Figures 1-12 to describe a duct assembly according to an embodiment of the present application. The duct assembly of the present application is applied to a cleaning device, and the duct assembly is used for the air circulation of the cleaning device. The cleaning device can clean and dry various items such as tableware or clothes.

[0047] Among them, the cleaning device can be a device with a hot air drying function such as a dishwasher, a clothes dryer or a shoe washing machine. In the embodiments of the present invention, the cleaning device includes a cleaning function and a hot air drying function. The cleaning mechanism in the cleaning function cleans the items in the cleaning chamber 11, and after the cleaning is completed, the hot air drying process starts to dry the items in the cleaning chamber 11, which can reduce the growth of bacteria. For the convenience of description, the present application will be described by taking a dishwasher as an example.

[0048] Among them, as Figure 1 , Figure 3 and Figure 4 shown, the embodiments of the present application provide a cleaning device, which includes: an inner container 1, a duct 21, a fan 22 and a heater 23.

[0049] The inner container 1 forms a cleaning chamber 11; the duct 21 has an air inlet 211 and an air outlet 212 communicating with the cleaning chamber 11; the fan 22 is installed in the duct 21, the fan 22 and the air inlet 211 are both located on the top wall 12 of the inner container 1, the upper shell 221 of the fan 22 forms a first chamber 2211 communicating with the air inlet 211 and the air outlet 212 and a second chamber 2212 isolated from the air inlet 211 and the air outlet 212, the impeller 222 of the fan 22 is installed in the first chamber 2211, and the motor assembly 223 of the fan 22 is installed in the second chamber 2212; the heater 23 is configured to heat the gas in the duct 21 when it is turned on.

[0050] Among them, as Figure 1 shown, the inner container 1 includes a top wall 12, a bottom wall 16, a back plate 14, side walls 13 and a front opening 15. The top wall 12, the bottom wall 16, the back plate 14 and the side walls 13 of the inner container 1 enclose the cleaning chamber 11. The top wall 12 of the inner container 1 is the top wall 12 of the cleaning chamber 11, the side walls 13 of the inner container 1 are the sides of the cleaning chamber 11, the back plate 14 of the inner container 1 is the back of the cleaning chamber 11, and the bottom wall 16 of the inner container 1 is the bottom surface of the cleaning chamber 11.

[0051] The cleaning device may further include a cover plate, which is pivotally connected to the inner container 1. The cover plate can rotate relative to the inner container 1 to open and close the front opening 15 of the inner container 1, facilitating the placement or removal of items into or from the cleaning chamber 11. The cover plate, together with the top wall 12, bottom wall 16, back plate 14, and side walls 13 of the inner container 1, encloses the cleaning chamber 11.

[0052] The cleaning chamber 11 is used for placing items to be cleaned. The items to be cleaned can be washed and dried within the cleaning chamber 11. The items to be cleaned can be tableware such as bowls, chopsticks, plates, and pots.

[0053] The cleaning chamber 11 may be provided with an item placement rack, which can include brackets such as a bowl basket 5, a chopstick rack, and a cup rack. The item placement rack can fix and support the tableware, and at the same time, it can also divide the space of the cleaning chamber 11, increasing the space utilization rate of the cleaning chamber 11.

[0054] The cleaning chamber 11 may also be provided with a spray arm for spraying high-pressure water flow. The high-pressure water flow can spray and flush the tableware in the cleaning chamber 11 to wash off the dirt attached to the tableware, thereby achieving the flushing of the tableware. Multiple spray arms can be provided, and the multiple spray arms can be installed at different positions in the cleaning chamber 11 to spray the tableware in multiple directions, at multiple angles, and at multiple levels, improving the cleaning effect of the tableware.

[0055] Among them, the air duct 21 can be used to realize the circulation of air in the cleaning chamber 11, for example, it can realize internal air circulation, external air circulation, or a mixture of internal and external air circulation.

[0056] The air duct 21 can be installed on the outer side or the inner side of the inner container 1, and the air duct 21 can be connected to the wall surface of the inner container 1 by means of snap connection, threaded connection, or welding.

[0057] The air duct 21 has an air inlet 211 and an air outlet 212 that are both communicated with the cleaning chamber 11. The gas in the cleaning chamber 11 is sucked into the air duct 21 from the air inlet 211 of the air duct 21 by the fan 22, and the hot air heated by the heater 23 enters the cleaning chamber 11 from the air outlet 212 of the air duct 21. The hot air can hot-air dry the tableware and other items in the cleaning chamber 11.

[0058] In this embodiment, the air duct 21 has an air inlet 211 communicated with the cleaning chamber 11 and an air outlet 212 communicated with the cleaning chamber 11. The air inlet 211 and the air outlet 212 can be located on the same wall surface of the inner container 1 or on different wall surfaces of the inner container 1, which is specifically set according to the use scenario. The number and ventilation area of the air inlet 211 and the air outlet 212 of the air duct 21 can be set according to the specific use scenario. For example, the number of the air outlets 212 can be set to two or one.

[0059] Among them, the inlet of the blower 22 is communicated with the air inlet 211 of the air duct 21, and the outlet of the blower 22 is communicated with the air outlet 212 of the air duct 21, so as to drive the gas in the air duct 21 through the blower 22.

[0060] The blower 22 drives the gas in the air duct 21 to flow from the air inlet 211 of the air duct 21 to the air outlet 212 of the air duct 21, that is, the gas in the cleaning chamber 11 is drawn into the air duct 21 by the blower 22, heated by the heater 23 and then driven by the blower 22 to be discharged into the cleaning chamber 11 from the air duct 21, forming an internal circulation.

[0061] The blower 22 is communicated with the air inlet 211 of the air duct 21, so that when the blower 22 is turned on, the gas in the cleaning chamber 11 can be drawn into the air duct 21. The blower 22 can be a centrifugal air supply device, an exhaust fan or a ventilation air supply device, etc., which can drive the gas to flow.

[0062] Among them, both the blower 22 and the air inlet 211 are located on the top wall 12 of the inner tank 1. The air suction side of the blower 22 faces the inside of the cleaning chamber 11. When the blower 22 operates, the hot air at the upper part in the cleaning chamber 11 can be introduced below the cleaning chamber 11 through the air duct 21, which is beneficial to the uniformity of the temperature distribution in the whole cleaning chamber 11.

[0063] In actual use, when the cleaning device is matched with an automatic door opening or automatic door opening and closing scheme as the main means of dehumidification, the hot air in the cleaning chamber 11 will move upward and backward in the cleaning chamber 11 due to natural convection. This installation position of the air inlet 211 and the blower 22 can prevent a large amount of humid and hot air from remaining above the cleaning chamber 11, reduce the drying dead angle, and is beneficial to improving the overall drying effect and rate.

[0064] Among them, there are at least the following two installation positions of the blower 22 on the top wall 12 of the inner tank 1:

[0065] First, the blower 22 can be installed above the top wall 12 of the cleaning chamber 11.

[0066] The thickness of the blower 22 is not less than 20 mm. For example, the thickness of the blower 22 can be 5 mm, 10 mm, 15 mm or 18 mm. By setting the thickness of the blower 22, it can be applicable to the dimensions between the top wall 12 of various inner tanks 1 and the outer shell of the cleaning device, improve the circulating air volume, and thus improve the higher power of the heater 23 and the better drying effect.

[0067] Second, the blower 22 can also be installed below the bottom wall 16 of the inner tank 1.

[0068] It should be noted that the distance from the bottom plate of the cleaning device to the ground is greater than the distance from the top plate of the housing, that is, the installation space under the bottom plate of the cleaning device is larger than the installation space of the top plate. A larger-sized fan 22 can be installed, and under the same noise level, the circulating air volume can be further increased, which is beneficial to the overall drying effect and shortens the drying time.

[0069] Among them, as Figure 4 shown, the upper shell 221 of the fan 22 forms a first cavity 2211 and a second cavity 2212. The impeller 222 of the fan 22 is installed in the first cavity 2211. The impeller 222 of the fan 22 is communicated with the air inlet 211 and the air outlet 212 to draw the air flow in the cleaning chamber 11 from the air inlet 211 and discharge it from the air outlet 212. The stator-rotor assembly 2234 and the circuit board 2233 of the fan 22 are both installed in the second cavity 2212. The second cavity 2212 is isolated from the air inlet 211 and the air outlet 212, so that water vapor can be reduced from entering the second cavity 2212, thereby reducing the contact between the water vapor and the stator-rotor assembly 2234 and the circuit board 2233, improving the reliability of the stator-rotor assembly 2234 and the circuit board 2233 of the fan 22, and prolonging the service life of the fan 22.

[0070] The motor assembly 223 of the fan 22 includes: a rotating shaft 2231, a circuit board 2233, a stator-rotor assembly 2234, magnets, windings, silicon steel sheets and other live components.

[0071] The impeller 222 of the fan 22 is used to rotate to generate power, so that the air flow is affected by the force and generates movement. The stator-rotor assembly 2234 and the circuit board 2233 of the fan 22 are used to realize the normal operation and control functions of the fan 22.

[0072] Among them, the following positional relationship may exist between the projection of the air suction port 22111 of the first cavity 2211 on the top wall 12 and the projection of the air inlet 211 on the top wall 12:

[0073] First, as Figure 2 shown, the projection of the air suction port 22111 of the first cavity 2211 on the top wall 12 and the projection of the air inlet 211 on the top wall 12 may have no overlapping area, so that in the cleaning mode of the cleaning device, water flow will not directly enter the air suction port 22111 of the first cavity 2211 from the air inlet 211 to impact the impeller 222 of the fan 22.

[0074] Second, as Figure 1As shown, the projection of the air inlet 22111 of the first chamber 2211 on the top wall 12 and the projection of the air inlet 211 on the top wall 12 can partially or completely overlap. Even if water flows from the air inlet 211 into the air inlet 22111 of the first chamber 2211, it cannot contact the stator-rotor assembly 2234 and the circuit board 2233 in the second chamber 2212, improving the reliability of the stator-rotor assembly 2234 and the circuit board 2233 of the blower 22 and extending the service life of the blower 22.

[0075] In the drying working mode of the cleaning device, the dry gas in the cleaning chamber 11 is circulated and heated by the heater 23 to reach an appropriate temperature and humidity for hot air drying of the tableware in the cleaning chamber 11.

[0076] Among them, the heater 23 can use heating methods such as electromagnetic heating, infrared heating, or resistance heating to heat the gas flowing through the air duct 21. The heater 23 using resistance heating can be a PTC (Positive Temperature Coefficient) heating device, a resistance wire heating device, a resistance coil heating device, etc.

[0077] When the heater 23 is turned on, it heats the gas flowing through the air duct 21. The heater 23 can be installed inside the air duct 21 to directly contact and exchange heat with the gas flowing through the air duct 21; the heater 23 can also be installed outside the air duct 21 to indirectly exchange heat with the gas flowing through the air duct 21 by heating the pipe wall of the air duct 21.

[0078] In this embodiment, the blower 22 and the heater 23 form the internal circulation assembly 2 of the cleaning device. The internal circulation assembly 2 is used to circulate and heat the gas in the cleaning chamber 11 and provide the heat required for drying the tableware and the air flow velocity required for convection.

[0079] According to the cleaning device provided by the embodiments of the present application, on the first hand, by providing an internal circulation component 2 such as an air duct 21, a blower 22, and a heater 23, both the air inlet 211 and the air outlet 212 of the air duct 21 are communicated with the cleaning chamber 11. The gas in the cleaning chamber 11 is sucked into the air duct 21 from the air inlet 211 of the air duct 21 by the blower 22, and the hot air heated by the heater 23 enters the cleaning chamber 11 from the air outlet 212 of the air duct 21. The dry gas in the cleaning chamber 11 is circularly heated by the heater 23 to realize hot air drying of the tableware in the cleaning chamber 11. Compared with the cleaning device that performs hot air drying through external circulation, the internal circulation drying working mode improves the utilization rate of hot air heat energy, reduces the energy consumption of the hot air drying working mode of the cleaning device, and realizes energy saving. On the second hand, by arranging the impeller 222 of the blower 22 in the first chamber 2211 and installing the stator-rotor assembly 2234 and the circuit board 2233 of the motor assembly 223 in the second chamber 2212, the entry of water vapor into the second chamber 2212 can be reduced, thereby reducing the contact between the water vapor and the stator-rotor assembly 2234 and the circuit board 2233, improving the reliability of the stator-rotor assembly 2234 and the circuit board 2233 of the blower 22, prolonging the service life of the blower 22, and reducing the interference and friction between the impeller 222 and the stator-rotor assembly 2234 and the circuit board 2233 with each other, which helps to improve the efficiency and service life of the blower 22 and is convenient for the maintenance and overhaul of the blower 22. On the third hand, the projection of the air suction port 22111 of the first chamber 2211 on the top wall 12 and the projection of the air inlet 211 on the top wall 12 have no overlapping area, which can reduce the amount of water flowing directly into the interior of the blower 22 from the inlet of the blower 22, and reduce the water flowing directly from the air inlet 211 into the air suction port 22111 of the first chamber 2211 to impact the impeller 222 of the blower 22, playing a protective role for the blower 22.

[0080] In some embodiments, as Figure 4 shown, the bottom surface opening of the upper shell 221 forms the air suction port 22111 of the first chamber 2211, and a part of the top surface of the upper shell 221 is recessed downward to form the second chamber 2212, and the rotating shaft 2231 of the motor assembly 223 penetrates the bottom surface of the second chamber 2212.

[0081] The bottom surface opening of the upper shell 221 forms the air suction port 22111 of the first chamber 2211, which enables the air in the cleaning chamber 11 to enter the first chamber 2211 from the air suction port 22111 and then be discharged by the rotation of the impeller 222. Such a design can ensure the effective flow of air and improve the ventilation efficiency of the blower 22.

[0082] A portion of the top surface of the upper shell 221 is recessed downward to form a second cavity 2212, which provides installation space for the stator and rotor assembly 2234 and the circuit board 2233 of the motor assembly 223, and isolates the second cavity 2212 from the air inlet 211 and the air outlet 212 through a portion of the top surface of the upper shell 221. During the cleaning and drying process of the cleaning equipment, the stator and rotor assembly 2234 and the circuit board 2233 in the second cavity 2212 are not in contact with the high temperature and high humidity inner cavity environment, which is beneficial to improving the stability and reliability of the fan 22, and there is no need to set up other waterproof isolation structures, thereby reducing costs.

[0083] The rotating shaft 2231 of the motor assembly 223 passes through the bottom surface of the second cavity 2212 and is coupled to the impeller 222 of the fan 22, so that the fan 22 can effectively transmit power to the impeller 222, thereby driving the air flow.

[0084] In some embodiments, as Figure 4 As shown, the impeller 222 is mounted on the rotating shaft 2231 through a threaded connector, and a sealing ring is provided on the portion of the rotating shaft 2231 extending out of the second cavity 2212 .

[0085] The impeller 222 and the rotating shaft 2231 are connected and fixed by a threaded connector to increase the stability of the connection between the impeller 222 and the rotating shaft 2231 and facilitate the installation or disassembly between the impeller 222 and the rotating shaft 2231.

[0086] Among them, the part of the rotating shaft 2231 extending out of the second cavity 2212 is provided with a sealing ring to reduce the heat and water entering the second cavity 2212 from the installation gap between the rotating shaft 2231 and the bottom surface of the second cavity 2212, increase the sealing effect of the second cavity 2212, and further reduce the contact between the stator and rotor assembly 2234 and the circuit board 2233 of the fan 22 in the second cavity 2212 and the high temperature and high humidity internal cavity environment.

[0087] In some embodiments, as Figure 4 As shown, the rotating shaft 2231 is supported on the bottom surface of the second cavity 2212 and the top cover 224 of the fan 22 through a bearing 2232, and the circuit board 2233 of the motor assembly 223 is installed on the side of the top cover 224 away from the stator and rotor assembly 2234 of the motor assembly 223, and the circuit board 2233 is connected to the top cover 224 and the upper shell 221 through sealant to close the top opening of the second cavity 2212.

[0088] Among them, the bearing 2232 can be a rolling bearing or a sliding bearing, and the rotating shaft 2231 is supported on the bottom surface of the second cavity 2212 and the top cover 224 of the fan 22 through the bearing 2232, which can improve the stability and reliability of the rotating shaft 2231, reduce vibration and friction, improve the service life and performance of the fan 22, and reduce the overall noise of the cleaning equipment.

[0089] Among them, installing the circuit board 2233 on the side of the top cover 224 facing away from the stator-rotor assembly 2234 can prevent the circuit board 2233 from being directly affected by the high temperature generated by the stator-rotor assembly 2234, which helps to protect the electronic components on the circuit board 2233, improve its service life, and at the same time can also reduce the mutual interference between the circuit board 2233 and the stator-rotor assembly 2234, improving the performance and stability of the blower 22.

[0090] Using sealant to connect the circuit board 2233 to the top cover 224 and the upper housing 221 can effectively seal the top opening of the second chamber 2212 and improve the waterproof performance of the blower 22. The sealant has good elasticity and durability, can tightly fill the gap between the top cover 224 and the upper housing 221, prevent the entry of moisture, and thus protect the circuit board 2233 and other motor components 223 inside the blower 22 from being affected by moisture and corrosion.

[0091] In some embodiments, at least part of the upper housing 221 is integrally provided with the air duct 21.

[0092] Among them, the side wall or the bottom wall of the upper housing 221 can be connected to the air duct 21 by means of snap connection, plug-in connection or bolt connection, so as to facilitate the assembly or disassembly of the blower 22 and the air duct 21, which helps to improve the overall performance and stability of the cleaning device.

[0093] In some embodiments, as Figure 4 shown, at least part of the bottom wall 16 of the air duct 21 gradually becomes higher from the area of the air inlet 211 to the area of the air suction port 22111 of the first chamber 2211.

[0094] Among them, the area between the bottom wall 16 of the air duct 21 from the area of the air inlet 211 to the area of the air suction port 22111 of the first chamber 2211 can be an arc surface or an inclined plane, so that the condensed water on the blower 22 side can gradually flow back from the air suction port 22111 of the first chamber 2211 to the cleaning chamber 11 through the air inlet 211 under the action of gravity, reducing the amount of water flowing into the interior of the air duct 21 and improving the working state reliability of the internal circulation components 2 such as the blower 22 and the heater 23.

[0095] In some embodiments, the bottom shell 210 of the air duct 21 includes an air guiding section connecting the air inlet 211 to the air suction port 22111 of the first chamber 2211, and at least part of the air guiding section gradually becomes higher in the direction from the air inlet 211 to the air suction port 22111 of the first chamber 2211.

[0096] Among them, at least part of the air induction section from the air inlet 211 to the air suction port 22111 of the first chamber 2211 can be an arc surface or an inclined plane, so that the condensed water on the fan 22 side gradually flows back from the air suction port 22111 of the first chamber 2211 to the cleaning chamber 11 through the air inlet 211 under the action of gravity, reducing the amount of water flowing into the inside of the air duct 21 and improving the working state reliability of the internal circulation components 2 such as the fan 22 and the heater 23.

[0097] In some embodiments, as Figure 9 shown, the direction of the air induction section from the air inlet 211 to the air suction port 22111 of the first chamber 2211 is inclined relative to the top wall 12.

[0098] In this embodiment, the air induction section can be in the shape of a conical frustum, so that the condensed water on the fan 22 side flows from the air suction port 22111 of the first chamber 2211 to the air inlet 211 and then back to the cleaning chamber 11, reducing the residual condensed water.

[0099] In some embodiments, as Figure 9 shown, the included angle α between the air induction section and the top wall 12 of the inner tank 1 satisfies: 0° < α ≤ 15°. For example, α can be 3°, 10° or 12°, and can be specifically set according to the actual installation scenario, so that the condensed water on the fan 22 side flows back to the cleaning chamber 11 through the air duct 21 and the inlet of the fan 22 under the action of gravity, reducing the amount of water directly flushing into the inside of the fan 22 from the inlet of the fan 22 and improving the working state reliability of the internal circulation components 2 such as the fan 22 and the heater 23.

[0100] In some embodiments, as Figure 1 and Figure 10 shown, the air inlet 211 of the air duct 21 is located on the top wall 12 of the cleaning chamber 11, and the air outlet 212 of the air duct 21 is located at the lower part of the side surface of the cleaning chamber 11.

[0101] Among them, the air inlet 211 of the air duct 21 can be located at the center of the top wall 12 of the cleaning chamber 11 or at a position close to the edge of the top wall 12 of the cleaning chamber 11, and the air outlet 212 of the air duct 21 can be located at the lower part close to the bottom surface of the adjacent side surface.

[0102] In the cleaning chamber 11, the air flow circulates upward from a position close to the bottom of the cleaning chamber 11. On the one hand, the uniformity of the temperature distribution in the cleaning chamber 11 can be improved through the flow direction of the air flow, which is beneficial to drying the whole chamber and reducing the drying dead angle; on the other hand, the water vapor entering the air duct 21, the fan 22 and the heater 23 through the air inlet 211 can be reduced, playing a protective role for them.

[0103] In some embodiments, as Figure 8As shown, the air inlet 211 is located on the top wall 12 of the cleaning chamber 11 and near the back plate 14, that is, the center of the air inlet 211 is located in the rear half of the whole cleaning device, which can reduce the influence of the air inlet 211 on the pushing and pulling of the bowl basket 5, so as to increase the depth of the bowl basket 5 and improve the capacity of the bowl basket 5.

[0104] In some embodiments, as Figure 7 shown, the air inlet 211 of the air duct 21 is arranged in the area of the top wall 12 of the cleaning chamber 11 near the side and the back plate 14.

[0105] In this embodiment, the air inlet 211 of the air duct 21 is located at the rear corner of the top wall 12 of the cleaning chamber 11, which can further reduce the influence of the air inlet 211 on the pushing and pulling of the bowl basket 5, so as to increase the depth and width of the bowl basket 5 and improve the capacity of the bowl basket 5.

[0106] In some embodiments, as Figure 3 shown, a sealing device 25 is arranged between the blower 22 and the air duct 21. The sealing device 25 can be an O-ring, a tape or a filling glue, etc., so as to seal the gap between the inner liner 1, the blower 22 and the air duct 21 of the cleaning device.

[0107] At the same time, the whole impeller 222 and the motor assembly 223 are wrapped between the upper shell 221 of the air duct 21 and the blower 22, and a sealing method is adopted in the middle. During the operation of the whole cleaning device, the inner liner 1, the blower 22 and the air duct 21 of the cleaning device belong to a closed space, which can reduce the amount of water vapor leaking out through the installation gap between the blower 22 and the air duct 21 at each stage and reduce potential hazards.

[0108] In some embodiments, as Figure 3 shown, sealing devices 25 and nuts are arranged at both the air inlet 211 and the air outlet 212 of the air duct 21. The nuts are tightened and compressed in a snap-fastener form to compress the sealing device 25. The sealing device 25 is located between the air duct 21 and the inner liner 1, which reduces the leakage of water in the cleaning chamber 11 from the gap between the air duct 21 and the inner liner 1, reduces the risk of water leakage and improves the reliability of the cleaning device.

[0109] In some embodiments, the cleaning device further includes an exhaust component 4. The exhaust component 4 is installed on the inner liner 1 and is configured to discharge the gas in the cleaning chamber 11 when it is turned on.

[0110] Among them, the exhaust component 4 is a related component capable of creating normal pressure or negative pressure in the cleaning chamber 11. The exhaust component 4 can be a fluid machine with an exhaust function such as an exhaust fan 22 or an air pump. When the cleaning chamber 11 is dried with hot air, the exhaust component 4 is used to discharge the evaporated or volatilized water vapor in the cleaning chamber 11 together with the gas, so as to reduce the relative humidity of the air in the cleaning chamber 11 and facilitate the evaporation of more residual water.

[0111] Wherein, the air outlet 212 is used to discharge the gas heated by the heater 23 into the cleaning chamber 11. The air inlet 41 of the exhaust assembly 4 is communicated with the cleaning chamber 11, and the air inlet 41 of the exhaust assembly 4 is used to discharge the water vapor that has evaporated or volatilized in the cleaning chamber 11 together with the gas out of the cleaning chamber 11.

[0112] In some embodiments, as Figure 7 shown, the cleaning chamber 11 has a first side 111 and a second side 112 which are oppositely arranged. The air outlet 212 of the air duct 21 is located on the second side 112, and the distance from the center of the air inlet 211 of the air duct 21 to the second side 112 is less than the distance from the center of the air inlet 211 to the first side 111.

[0113] In this embodiment, as shown in the figure, the exhaust assembly 4 can be installed on the first side 111. The exhaust assembly 4 and the air outlet 212 are respectively located on the relatively arranged first side 111 and second side 112. The air inlet 211 is located at a position close to the second side 112 where the air outlet 212 is located, that is, the air inlet 211 is far from the exhaust assembly 4.

[0114] By arranging the exhaust assembly 4 and the air outlet 212 on the relatively arranged sides and arranging the air inlet 211 far from the exhaust assembly 4, when the exhaust assembly 4 and the fan 22 work simultaneously, the flow path of the gas heated by the heater 23 in the cleaning chamber 11 can be extended, the utilization efficiency of the hot air heat energy can be improved, the energy consumption of the hot air drying working mode of the cleaning device can be reduced, energy saving can be realized, and at the same time, the uniformity of the gas mixing in the cleaning chamber 11 can be improved, and the drying dead angle can be reduced.

[0115] In some embodiments, when the exhaust assembly 4 is working, the exhaust volume of the exhaust assembly 4 is not less than the amount of gas entering the cleaning chamber 11 from the outside.

[0116] It should be noted that in actual use, it is impossible to achieve a completely sealed cleaning chamber 11, and there is still a small amount of gas exchange between the cleaning chamber 11 and the outside. When the exhaust volume of the exhaust assembly 4 is not less than the amount of gas entering the cleaning chamber 11 from the outside, the cleaning chamber 11 is in an atmospheric pressure or negative pressure environment, and the negative pressure environment is helpful for improving the drying rate.

[0117] In this embodiment, when only the exhaust assembly 4 is working, due to the lack of sufficient supplement of external air, the cleaning chamber 11 is pumped into a negative pressure state by the exhaust assembly 4, and the negative pressure environment is helpful for improving the drying rate.

[0118] When the internal circulation assembly 2 and the exhaust assembly 4 work simultaneously, the fan 22 can circulate the air in the cleaning chamber 11, so that the temperature and humidity distribution in the cleaning chamber 11 is uniform, and the effect of uniform drying of the whole chamber is further improved.

[0119] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 shown, the air duct 21 includes a make-up air branch 213. The make-up air inlet 2131 of the make-up air branch 213 is in communication with the outside, and the make-up air outlet of the make-up air branch 213 is in communication with the cleaning chamber 11. When the exhaust component 4 and the fan 22 are operating, the exhaust volume of the exhaust component 4 is not less than the air supply volume of the make-up air branch 213.

[0120] Among them, the air duct 21 includes two branches of internal circulation and external circulation. The make-up air inlet 2131 of the make-up air branch 213 is in communication with the outside, and the make-up air outlet of the make-up air branch 213 is in communication with the cleaning chamber 11. The setting of the make-up air branch 213 forms an external circulation branch of the cleaning chamber 11; the branch with an air inlet 211 and an air outlet 212 that is in communication with the cleaning chamber 11 belongs to the internal circulation branch.

[0121] By setting the make-up air branch 213, the external circulation and / or internal circulation of the cleaning chamber 11 can be realized to achieve various working modes of the cleaning device.

[0122] During the operation of only the fan 22, in order to maintain the pressure balance in the cleaning chamber 11, the fan 22 will preferably only draw in the air inside the cleaning chamber 11 to achieve basic internal circulation. At this time, the air volume of the internal circulation is much larger than that of the external circulation, so as to quickly increase the temperature and humidity inside the cleaning chamber 11; when the fan 22 and the exhaust component 4 are operating simultaneously, the exhaust component 4 extracts and discharges the air inside the cleaning chamber 11. At this time, the fan 22 will mainly introduce external air, and a small amount of the air inside the chamber is sucked in for circulation. At this time, both internal and external circulations are carried out simultaneously, which can effectively meet the rapid dehumidification requirements during the dehumidification stage.

[0123] Among them, when the exhaust component 4 and the fan 22 are operating, the exhaust volume of the exhaust component 4 is not less than the air supply volume of the make-up air branch 213, that is, when the exhaust component 4 is turned on, the inside of the cleaning chamber 11 is pumped to normal pressure or negative pressure by the exhaust component 4. In other words, when the make-up air branch 213 supplies air, the cleaning chamber 11 is at normal pressure or negative pressure, and when the make-up air branch 213 does not supply air, the cleaning chamber 11 is at negative pressure.

[0124] In the related art, the single internal circulation scheme helps to circulate and heat the gas to be dried inside the cleaning chamber 11 and reach a suitable temperature. However, the single internal circulation scheme also requires the exhaust component 4 to gradually discharge the evaporated water vapor. During the discharge stage, there is no introduction of external gas, and the exhaust component 4 will gradually pump the cleaning chamber 11 to negative pressure. The negative pressure causes a gradual decrease in the exhaust rate, resulting in that the overall dehumidification rate of the cleaning device is not well improved.

[0125] By providing a make-up air branch 213, when the exhaust assembly 4 operates, the air pressure balance in the cleaning chamber 11 can be maintained through the make-up air branch 213, and the vacuum degree in the cleaning chamber 11 can be reduced. As a result, a relatively high exhaust rate can be maintained, the water vapor in the cleaning chamber 11 can be quickly discharged, the overall moisture removal rate and drying rate of the cleaning device can be improved, and the energy consumption of hot air drying can be further reduced.

[0126] In some embodiments, as Figure 11 shown, the cleaning device further includes: a side plate 3, the heater 23 is installed in the area of the air duct 21 on the side of the inner tank 1, the side plate 3 is installed on the side of the inner tank 1 and covers at least a part of the air duct 21, and the inner side surface of the side plate 3 is spaced apart from the air duct 21 and the heater 23.

[0127] Among them, the heater 23 and at least a part of the air duct 21 are located between the side plate 3 and the inner tank 1. The side plate 3 can protect the heater 23 and at least a part of the air duct 21, and at the same time can reduce the risk of people touching the high-voltage components and high-temperature heating components, improving safety.

[0128] In some embodiments, as Figure 12 shown, the inner side surface of the side plate 3 is spaced apart from the air duct 21, and the spacing is c, and the spacing c satisfies: c≥2mm.

[0129] Among them, the spacing c between the inner side surface of the side plate 3 and the air duct 21 can be 2mm, 4mm, 7mm or a wider distance.

[0130] In other words, the side plate 3 is installed outside the side wall 13 of the inner tank 1, and the inner side surface of the side plate 3 is spaced apart from the air duct 21 and the heater 23.

[0131] It can be understood that the heater 23 is installed in the area of the side wall 13 of the inner tank 1 of the air duct 21. In some embodiments, components such as a thermostat are also installed in the air duct 21. The heating tube generates a large amount of heat, and both the heating tube and the thermostat contain high-voltage terminals, and the high-voltage terminals are directly connected to high voltage.

[0132] On the premise of ensuring grounding, by installing the side plate 3 and setting the spacing between the inner side surface of the side plate 3 and the air duct 21, on the one hand, it can prevent the side plate 3 from directly touching the high-voltage and high-temperature heating components, improving the safety of the cleaning device; on the other hand, the outer side wall temperature of the side plate 3 can be controlled within a safe range, reducing the risk of people being scalded when touching the side wall 13. In the embedded installation of the cleaning device, the high temperature of the side plate can damage the inner wall of the installation cabinet.

[0133] In some embodiments, the power of the heater 23 is P, and it satisfies: P≤500W.

[0134] Among them, the power P of the heater 23 can be 150W, 200W, 350W, 400W or 500W, and can be specifically limited according to the usage situation.

[0135] In the related art, due to the limited installation position of the cleaning device with the external circulation hot air drying mode, the size of the fan 22 and the power of the heater 23 are small, and the hot air drying can only be used as an auxiliary energy source, while the high-temperature rinsing is the main energy source. Therefore, the tableware washed by hand requires a relatively long time for single drying operation, which is not convenient.

[0136] This application uses the internal circulation hot air drying mode, increases the power of the heater 23, sets the power of the heater 23 to P, can use the hot air drying as the main energy source, and converts the high-temperature rinsing into an auxiliary energy source, significantly shortening the drying time of the tableware and improving the convenience.

[0137] In some embodiments, as Figure 3 shown, the air outlet 212 is provided with a grille 2156.

[0138] Among them, the grille 2156 is used for guiding the air flow. The grille 2156 can introduce the air flow at the air outlet 212 into different directions, and the diversion direction of the grille 2156 can be determined according to the installation position of the exhaust assembly 4 and the installation position of the air inlet 211 of the air duct 21.

[0139] For example, if the air inlet 211 of the air duct 21 is arranged on the top wall 12 of the cleaning chamber 11, the grille 2156 can appropriately direct the hot air downward in the cleaning chamber 11, so as to extend the flow path of the hot air in the cleaning chamber 11, increase the area of the gas heated by the heater 23 flowing through the entire cleaning chamber 11, and improve the drying effect of the entire cavity and dead corners of the cleaning chamber 11.

[0140] For example, if the exhaust assembly 4 is located in the upper left part of the cleaning chamber 11, the grille 2156 can appropriately direct the hot air downward and backward in the cleaning chamber 11, so as to extend the flow path of the hot air in the cleaning chamber 11, increase the area of the gas heated by the heater 23 flowing through the entire cleaning chamber 11, improve the drying effect of the entire cavity and dead corners of the cleaning chamber 11, and reduce the amount of hot air discharged by the exhaust assembly 4 without being utilized, increasing the utilization efficiency of the hot air heat energy.

[0141] Among them, the grille 2156 can also reduce the direct impact of water flow on the air duct 21 and play a protective role for the air duct 21.

[0142] In some embodiments, the cleaning device at least has the following working modes:

[0143] First, the cleaning device has an internal circulation drying working mode.

[0144] In the in - loop drying working mode, the blower 22 and the heater 23 work, and the exhaust component 4 stops. The gas in the cleaning chamber 11 is sucked into the air duct 21 by the blower 22 from the air inlet 211 of the air duct 21. The hot air heated by the heater 23 enters the cleaning chamber 11 from the air outlet 212 of the air duct 21. The air in the cleaning chamber 11 is circulated and heated, and the heat is evenly distributed. The cooler areas in the cleaning chamber 11 can be evaporated and dried faster through heat transfer and convective heat transfer, which is beneficial to the drying of the entire cavity in the cleaning chamber 11 and reduces the drying dead - ends.

[0145] When the temperature and humidity in the cleaning chamber 11 are too low, by turning on the blower 22 and the heater 23, forced convection and circulating heating in the cleaning chamber 11 can be achieved, accelerating the evaporation of the remaining water in the cleaning chamber 22.

[0146] Second, the cleaning device has a moisture - exhausting negative - pressure working mode;

[0147] In the moisture - exhausting negative - pressure working mode, the blower 22 and the heater 23 stop, and the exhaust component 4 works. Due to the lack of external air supplement, the cleaning chamber 11 is pumped into a negative - pressure state by the exhaust component 4. The negative - pressure environment also helps to improve the drying rate accordingly.

[0148] Third, the cleaning device has a mixed working mode;

[0149] In the mixed working mode, the blower 22, the heater 23 and the exhaust component 4 all work. The blower 22 can circulate the air in the cleaning chamber 11, making the temperature and humidity distribution in the cleaning chamber 11 uniform, and further improving the effect of uniform drying of the entire cavity.

[0150] Fourth, the cleaning device has a mixed moisture - exhausting working mode;

[0151] In the mixed moisture - exhausting working mode, the blower 22 and the exhaust component 4 both work, and the heater 23 stops, so as to realize the mixing and moisture - exhausting of the air in the cleaning chamber 11, and further improve the effect of uniform moisture - exhausting of the entire cavity.

[0152] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here. And the objects distinguished by "first", "second", etc. are usually of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / ", generally represents an "or" relationship between the related objects before and after.

[0153] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0154] In the description of the present application, the "first feature" and "second feature" may include one or more of such features.

[0155] In the description of the present application, the meaning of "a plurality" is two or more.

[0156] In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0157] In the description of the present application, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature.

[0158] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0159] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A cleaning device, characterized in that, include: The inner tank forms a cleaning chamber; an air duct having an air inlet and an air outlet communicating with the cleaning chamber; a fan mounted in the air duct, the fan and the air inlet being both located on the top wall of the liner, the upper shell of the fan forming a first cavity communicating with the air inlet and the air outlet and a second cavity isolated from the air inlet and the air outlet, the impeller of the fan being mounted in the first cavity, and the motor components of the fan being mounted in the second cavity; The heater is configured to heat the gas in the air duct when turned on.

2. The cleaning device according to claim 1, characterized in that, The bottom surface of the upper shell is opened to form the air intake of the first cavity, a portion of the top surface of the upper shell is recessed downward to form the second cavity, and the rotating shaft of the motor assembly passes through the bottom surface of the second cavity.

3. The cleaning device according to claim 2, characterized in that, The impeller is mounted on the rotating shaft via a threaded connector, and a sealing ring is provided on the portion of the rotating shaft extending out of the second cavity.

4. The cleaning device according to claim 2, characterized in that, The rotating shaft is supported by bearings on the bottom surface of the second cavity and the top cover of the fan. The circuit board of the motor assembly is installed on the side of the top cover away from the stator and rotor assembly of the motor assembly, and the circuit board is connected to the top cover and the upper shell by sealant to close the top opening of the second cavity.

5. The cleaning device according to claim 1, characterized in that, At least a portion of the upper shell is integrated with the air duct.

6. The cleaning device according to claim 1, characterized in that At least a portion of the bottom wall of the air duct from the area of the air inlet to the area of the air suction port of the first cavity gradually becomes higher.

7. The cleaning device according to claim 6, characterized in that, The bottom shell of the air duct includes an air introduction section connected from the air inlet to the air suction port of the first cavity, and at least a portion of the air introduction section gradually becomes higher in a direction from the air inlet to the air suction port of the first cavity.

8. The cleaning device according to claim 7, characterized in that, The direction of the air introduction section from the air inlet to the air suction port of the first cavity is inclined relative to the top wall.

9. The cleaning device according to any one of claims 1-8, characterized in that, Also includes: The exhaust assembly is installed in the inner container and is configured to exhaust the gas in the cleaning chamber when it is turned on.

10. The cleaning device according to claim 9, characterized in that, When the exhaust assembly is in operation, the exhaust volume of the exhaust assembly is not less than the volume of gas entering the cleaning chamber from the outside.

11. The cleaning device according to claim 9, characterized in that The air duct includes an air supply branch, the air supply inlet of the air supply branch is connected to the outside world, and the air supply outlet of the air supply branch is connected to the cleaning chamber. When the exhaust component and the fan are working, the exhaust volume of the exhaust component is not less than the air supply volume of the air supply branch.

12. The cleaning device according to any one of claims 1-8, characterized in that, Also includes: The side plate is installed in the area of the air duct located on the side of the inner tank, the side plate is installed on the side of the inner tank, and the cover is arranged outside at least part of the air duct, and the inner side surface of the side plate is separated from the air duct and the heater.

13. The cleaning device according to any one of claims 1-8, characterized in that, The power of the heater is P, which satisfies: P≤500W.

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