Cleaning device

Abstract

A cleaning device, comprising: an inner tank (1), an air exhaust assembly (4), an air duct (21), a fan (22), and a heater (23). A cleaning cavity (11) is formed in the inner tank (1); the air exhaust assembly (4) is mounted in the inner tank (1) and is configured to discharge the gas in the cleaning cavity (11) when the air exhaust assembly (4) is turned on; the air duct (21) is mounted in the inner tank (1) and comprises an air inlet (211) and air outlets (212), and the air inlet (211) and the air outlets (212) are all communicated with the cleaning cavity (11); the fan (22) is configured to drive the gas in the air duct (21) when the fan (22) is turned on; and the heater (23) is configured to heat the gas flowing through the air duct (21) when the heater (23) is turned on.

Description

Cleaning equipment

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202420259689.9, filed on February 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of household appliances, and more specifically, to a cleaning device. Background Technology

[0004] Drying methods for cleaning equipment such as dishwashers include condensation drying, hot air drying, adsorption drying, and quick-drying with the door open. Condensation drying suffers from poor drying efficiency and long drying times; adsorption drying is expensive and can cause odors after prolonged storage; and quick-drying with the door open can attract insects and cause moisture buildup in humid areas due to the inability to automatically close the door promptly. Therefore, considering both cost and drying effectiveness, hot air drying has become the preferred method for most manufacturers.

[0005] Currently, most cleaning appliances such as dishwashers rely on external circulation systems for hot air drying. The process involves drawing in outside air and heating it with a heater. This heated air is then introduced into the cleaning chamber to dry the items inside. During the hot air drying process, the intake of outside air creates positive pressure within the chamber. To maintain normal pressure within the chamber, the exhaust system is typically turned on to reduce water vapor leakage caused by the positive pressure.

[0006] However, the opening of the exhaust component can lead to the exhaust of the heated air into the cleaning chamber without fully utilizing its thermal energy, resulting in problems such as high energy consumption, low drying efficiency, and poor drying effect, which need to be improved.

[0007] Summary of the Invention

[0008] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a cleaning device that, compared with cleaning devices that use external circulation for hot air drying, improves the utilization rate of hot air thermal energy, reduces the energy consumption of the cleaning device in the hot air drying working mode, and achieves energy saving.

[0009] In a first aspect, this application provides a cleaning device, comprising:

[0010] Inner liner, which forms a clean chamber;

[0011] An exhaust assembly, installed in the inner liner, is configured to exhaust gas from the clean chamber when open;

[0012] An air duct is installed in the inner liner and has an air inlet and an air outlet, both of which are connected to the cleaning chamber.

[0013] A fan configured to drive gas within the duct when activated;

[0014] A heater configured to heat gas flowing through the duct when turned on.

[0015] According to the cleaning equipment provided in this application embodiment, an internal circulation component such as an air duct, a fan, and a heater is provided. Both the air inlet and outlet of the air duct are connected to the cleaning chamber. Gas in the cleaning chamber is drawn into the air duct by the fan through the air inlet, and the hot air, heated by the heater, enters the cleaning chamber from the air outlet. 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 to cleaning equipment that uses external circulation for hot air drying, the internal circulation drying mode improves the utilization rate of hot air heat energy, reduces the energy consumption of the cleaning equipment's hot air drying mode, and achieves energy saving.

[0016] According to one embodiment of this application, when the exhaust assembly is in operation, the exhaust volume of the exhaust assembly is not less than the amount of gas entering the cleaning chamber from the outside.

[0017] According to one embodiment of this application, the air duct includes a makeup air branch, the makeup air inlet of the makeup air branch is connected to the outside, and the makeup air outlet of the makeup air branch is connected to the clean chamber.

[0018] According to one embodiment of this application, when the exhaust assembly and the fan are working, the exhaust volume of the exhaust assembly is not less than the air supply volume of the air supply branch.

[0019] According to one embodiment of this application, the air inlet is located on the top wall of the cleaning chamber, and the air outlet is located on the lower side of the cleaning chamber.

[0020] According to one embodiment of this application, the fan is installed above the top wall of the inner liner, and at least a portion of the air duct is located above the top wall and outside the side wall of the inner liner.

[0021] According to one embodiment of this application, it further includes: a side plate, wherein the heater is mounted in the region of the air duct located on the side wall of the inner liner, the side plate being mounted on the side wall of the inner liner and covering at least a portion of the air duct.

[0022] According to one embodiment of this application, the inner side of the side plate is spaced apart from the air duct, and the distance is c, which satisfies c≥2mm.

[0023] According to one embodiment of this application, the power of the heater is P, which satisfies: P≤500W.

[0024] According to one embodiment of this application, the fan includes: an upper casing, an impeller, and a motor assembly, wherein the motor assembly is dynamically coupled to the impeller, the upper casing is connected to the air duct to form a receiving cavity, and the impeller is mounted in the receiving cavity.

[0025] According to one embodiment of this application, the cleaning equipment has an internal circulation drying working mode, in which the fan and the heater are working, and the exhaust assembly is stopped.

[0026] According to one embodiment of this application, the cleaning equipment has a dehumidification negative pressure working mode, in which the fan and the heater are stopped, and the exhaust assembly is in operation.

[0027] According to one embodiment of this application, the cleaning equipment has a hybrid operating mode in which the fan, the heater, and the exhaust assembly all operate.

[0028] According to one embodiment of this application, the cleaning equipment has a mixed dehumidification working mode; in the mixed dehumidification working mode, both the fan and the exhaust assembly are working, and the heater is off.

[0029] Secondly, this application provides a cleaning device, comprising:

[0030] Inner liner, which forms a clean chamber;

[0031] An exhaust assembly, installed in the inner liner, is configured to exhaust gas from the clean chamber when open;

[0032] An air duct is installed in the inner liner and has an air inlet and an air outlet, both of which are connected to the cleaning chamber.

[0033] A fan configured to drive gas within the duct when activated;

[0034] A heater configured to heat gas flowing through the duct when turned on.

[0035] According to the cleaning equipment provided in this application embodiment, an internal circulation component such as an air duct, a fan, and a heater is provided. Both the air inlet and outlet of the air duct are connected to the cleaning chamber. Gas in the cleaning chamber is drawn into the air duct by the fan through the air inlet, and the hot air, heated by the heater, enters the cleaning chamber from the air outlet. 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 to cleaning equipment that uses external circulation for hot air drying, the internal circulation drying mode improves the utilization rate of hot air heat energy, reduces the energy consumption of the cleaning equipment's hot air drying mode, and achieves energy saving.

[0036] According to one embodiment of this application, when the exhaust assembly is in operation, the exhaust volume of the exhaust assembly is not less than the amount of gas entering the cleaning chamber from the outside.

[0037] According to one embodiment of this application, the air duct includes a makeup air branch, the makeup air inlet of the makeup air branch is connected to the outside, the makeup air outlet of the makeup air branch is connected to the clean chamber, and when the exhaust assembly and the fan are working, the exhaust volume of the exhaust assembly is not less than the makeup air volume of the makeup air branch.

[0038] According to one embodiment of this application, the air inlet is located on the top wall of the cleaning chamber, and the air outlet is located on the lower side of the cleaning chamber.

[0039] According to one embodiment of this application, the fan is installed above the top wall of the inner liner, and at least a portion of the air duct is located above the top wall and outside the side wall of the inner liner.

[0040] According to one embodiment of this application, it further includes: a side plate, wherein the heater is mounted in the region of the air duct located on the side wall of the inner liner, the side plate being mounted on the side wall of the inner liner and covering at least a portion of the air duct.

[0041] According to one embodiment of this application, the inner side of the side plate is spaced apart from the air duct, and the distance is c, which satisfies c≥2mm.

[0042] According to one embodiment of this application, the power of the heater is P, which satisfies: P≤500W.

[0043] According to one embodiment of this application, the fan includes: an upper casing, an impeller, and a motor assembly, wherein the motor assembly is dynamically coupled to the impeller, the upper casing is connected to the air duct to form a receiving cavity, and the impeller is mounted in the receiving cavity.

[0044] According to one embodiment of this application, the cleaning equipment has an internal circulation drying working mode, in which the fan and the heater are working, and the exhaust assembly is stopped;

[0045] And / or, the cleaning equipment has a dehumidification negative pressure working mode, in which the fan and the heater are stopped, and the exhaust assembly is working;

[0046] And / or, the cleaning equipment has a hybrid operating mode in which the fan, the heater, and the exhaust assembly all operate;

[0047] And / or, the cleaning equipment has a mixed dehumidification operating mode; in the mixed dehumidification operating mode, both the fan and the exhaust assembly are operating, and the heater is off.

[0048] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0049] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0050] Figure 1 is a schematic diagram of one of the cleaning devices provided in an embodiment of this application;

[0051] Figure 2 is a second schematic diagram of the structure of the cleaning equipment provided in the embodiment of this application;

[0052] Figure 3 is one of the structural schematic diagrams of the inner circulation component provided in the embodiment of this application;

[0053] Figure 4 is a third structural schematic diagram of the cleaning equipment provided in the embodiment of this application;

[0054] Figure 5 is a second schematic diagram of the internal circulation component provided in an embodiment of this application;

[0055] Figure 6 is a fourth structural schematic diagram of the cleaning equipment provided in the embodiment of this application;

[0056] Figure 7 is a fifth structural schematic diagram of the cleaning equipment provided in the embodiments of this application;

[0057] Figure 8 is a magnified view of part A in Figure 7;

[0058] Figure 9 is a sixth structural schematic diagram of the cleaning equipment provided in the embodiment of this application;

[0059] Figure 10 is a seventh structural schematic diagram of the cleaning equipment provided in the embodiment of this application;

[0060] Figure 11 is a magnified view of part B in Figure 7;

[0061] Figure 12 is the eighth structural schematic diagram of the cleaning equipment provided in the embodiment of this application;

[0062] Figure 13 is a ninth structural schematic diagram of the cleaning equipment provided in the embodiment of this application;

[0063] Figure 14 is a structural schematic diagram of the cleaning equipment provided in the embodiment of this application;

[0064] Figure 15 is a third structural schematic diagram of the inner circulation component provided in the embodiment of this application;

[0065] Figure 16 is a structural schematic diagram of the flexible connector provided in an embodiment of this application;

[0066] Figure 17 is a schematic diagram of the structure of the downdraft provided in an embodiment of this application;

[0067] Figure 18 is a schematic diagram of the structure of the updraft duct provided in an embodiment of this application;

[0068] Figure 19 is a schematic diagram of the main body provided in an embodiment of this application;

[0069] Figure 20 is an eleventh schematic diagram of the cleaning equipment provided in the embodiment of this application;

[0070] Figure 21 is a magnified view of part D in Figure 20;

[0071] Figure 22 is a schematic diagram of the cleaning equipment provided in the embodiment of this application, number 12.

[0072] Figure 23 is a magnified view of part C in Figure 22;

[0073] Figure 24 is a structural schematic diagram of the cleaning equipment provided in the embodiment of this application (Figure 13).

[0074] Figure 25 is a magnified view of a portion of point E in Figure 22;

[0075] Figure 26 is one of the structural schematic diagrams of the water-retaining cover provided in the embodiment of this application;

[0076] Figure 27 is a second structural schematic diagram of the water-retaining cover provided in an embodiment of this application;

[0077] Figure 28 is a third structural schematic diagram of the water-retaining cover provided in the embodiment of this application;

[0078] Figure 29 is a fourth structural schematic diagram of the water-retaining cover provided in the embodiment of this application;

[0079] Figure 30 is the fifth structural schematic diagram of the water-retaining cover provided in the embodiment of this application;

[0080] Figure 31 is a sixth schematic diagram of the structure of the water-retaining cover provided in the embodiment of this application.

[0081] Reference numerals: Inner liner 1, Cleaning chamber 11, First side 111, Second side 112; Top wall 12, Mounting boss 121, Side wall 13, Back plate 14, Front opening 15, Bottom wall 16; Internal circulation component 2, Air inlet 20, Flanged edge 201; Air duct 21, Air inlet 211, Air outlet 212, Make-up air branch 213, Make-up air inlet 2131, Upper air duct 214, Horizontal section 2141, Lower connecting section 2142, First connecting structure 2143; Fan mounting position 2146, First air guide section 2147, Volute 2148, Arc section 21481, Straight section 21482; Second air guide section 2149; Lower air duct 215, Expansion section 2154, Isolation plate 2155; Grille 2156; Main body 2158, upper connecting section 21581, air duct shell 21582, third connecting structure 21583, heat spreader 21584, heater mounting position 21585, thermostat mounting position 21586, cover 2157, fourth connecting structure 21571; flexible connector 217, cover plate 2171, second connecting structure 21711, sleeve 2172, clearance hole 2173; fan 22, upper shell 221, impeller 222; heater 23, water baffle 24, water baffle plate 241, annular rib 2411, mounting structure 242, slot 2421, connector 2422, hollow groove 24221, snap joint 2423; main cover 243, pipe body 2431, vent 2432, flange 2433, sealing mounting position 24331, protrusion 24332. 24333 reinforcing ribs, 2434 water inlet; 244 water baffle, 2441 first plate, 2442 second plate, 2443 flow guide surface; 25 sealing device, 29 thermostat; 3 side plate, 4 exhaust assembly, 41 air inlet, 5 bowl basket. Detailed Implementation

[0082] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein 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 this application, and should not be construed as limiting this application.

[0083] The cleaning device according to an embodiment of this application is described below with reference to Figures 1-31. The cleaning device of this application can clean and dry various items such as tableware or clothing.

[0084] The cleaning equipment can be a dishwasher, dryer, or shoe washer, or other device with a hot air drying function. In this embodiment of the invention, the cleaning equipment includes a cleaning function and a hot air drying function. The cleaning mechanism in the cleaning function cleans the items in the cleaning chamber, and after cleaning, it begins the hot air drying process. Drying the items in the cleaning chamber can reduce bacterial growth. For ease of explanation, this application uses a dishwasher as an example for further description.

[0085] As shown in Figures 1, 2 and 3, the cleaning equipment of this application embodiment includes: an inner tank 1, an exhaust assembly 4, an air duct 21, a fan 22 and a heater 23.

[0086] The inner liner 1 forms a clean chamber 11; an exhaust assembly 4 is installed in the inner liner 1 and is configured to exhaust the gas in the clean chamber 11 when it is turned on; an air duct 21 is installed in the inner liner 1 and has an air inlet 211 and an air outlet 212, both of which are connected to the clean chamber 11; a fan 22 is configured to drive the gas in the air duct 21 when it is turned on; and a heater 23 is configured to heat the gas flowing through the air duct 21 when it is turned on.

[0087] The inner liner 1 includes a top wall 12, a bottom wall 16, a back plate 14, a side wall 13, and a front opening 15. The top wall 12, bottom wall 16, back plate 14, and side wall 13 of the inner liner 1 form a cleaning chamber 11. The top wall 12 of the inner liner 1 is the top wall 12 of the cleaning chamber 11, the side wall 13 of the inner liner 1 is the side of the cleaning chamber 11, the back plate 14 of the inner liner 1 is the rear of the cleaning chamber 11, and the bottom wall 16 of the inner liner 1 is the bottom surface of the cleaning chamber 11.

[0088] The cleaning device may also include a cover plate 2171, which is pivotally connected to the inner liner 1. The cover plate 2171 is rotatable relative to the inner liner 1 to open and close the front opening 15 of the inner liner 1 to facilitate the insertion or removal of items from the cleaning chamber 11. The cover plate 2171, together with the top wall 12, bottom wall 16, back plate 14 and side wall 13 of the inner liner 1, forms the cleaning chamber 11.

[0089] The cleaning chamber 11 is used to place items to be cleaned. The items to be cleaned can be washed and dried in the cleaning chamber 11. The items to be cleaned can be tableware such as bowls, chopsticks, plates and pots.

[0090] The cleaning chamber 11 may have a shelf for placing items. The shelf may include a bowl basket 5, a chopstick holder, and a cup holder. The shelf can fix and support the tableware, and can also divide the space of the cleaning chamber 11, increasing the space utilization of the cleaning chamber 11.

[0091] The cleaning chamber 11 may also include spray arms, which spray high-pressure water jets to rinse the tableware inside the cleaning chamber 11, washing away any dirt adhering to the tableware and thus achieving the desired cleaning effect. Multiple spray arms can be installed in different positions within the cleaning chamber 11 to provide multi-directional, multi-angle, and multi-layered spraying of the tableware, thereby improving the cleaning efficiency.

[0092] The air duct 21 can be used to circulate the air in the clean chamber 11, for example, to achieve internal air circulation, external air circulation, or a mixture of internal and external circulation.

[0093] The air duct 21 can be installed on the outside or inside of the inner liner 1. The air duct 21 can be connected to the wall of the inner liner 1 by means of snap-fit, threaded connection or welding.

[0094] The air duct 21 has an air inlet 211 and an air outlet 212 that are both connected to the cleaning chamber 11. The gas in the cleaning chamber 11 is drawn into the air duct 21 by the fan 22 through the air inlet 211. The hot air, heated by the heater 23, enters the cleaning chamber 11 through the air outlet 212. The hot air can dry the tableware and other items in the cleaning chamber 11.

[0095] In this embodiment, the air duct 21 has an air inlet 211 communicating with the cleaning chamber 11 and an air outlet 212 communicating with the cleaning chamber 11. The air inlet 211 and the air outlet 212 can be located on the same wall of the inner liner 1 or on different walls of the inner liner 1, depending on the usage scenario. The number of air inlets 211 and air outlets 212 and the ventilation area of ​​the air duct 21 can be set according to the specific usage scenario. For example, there can be two air outlets 212 or one air outlet 212.

[0096] The inlet of the fan 22 is connected to the air inlet 211 of the air duct 21, and the outlet of the fan 22 is connected to the air outlet 212 of the air duct 21, so as to drive the gas in the air duct 21 through the fan 22.

[0097] The fan 22 drives the gas in the air duct 21 to flow from the air inlet 211 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 fan 22, heated by the heater 23, and then driven by the fan 22 to be discharged from the air duct 21 into the cleaning chamber 11, forming an internal circulation.

[0098] The fan 22 is connected to the air inlet 211 of the air duct 21, so that when the fan 22 is turned on, it draws the gas in the clean chamber 11 into the air duct 21. The fan 22 can be installed at the air inlet 211, the air outlet 212, or between the air inlet 211 and the air outlet 212 of the air duct 21. The fan 22 can be a centrifugal fan, exhaust fan, or ventilation fan, or other device that can drive the flow of gas.

[0099] In the drying mode of the cleaning equipment, the dry gas in the cleaning chamber 11 is circulated and heated by the heater 23 to reach a suitable temperature and humidity, so as to dry the tableware in the cleaning chamber 11 with hot air.

[0100] The heater 23 can use 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) heater, a resistance wire heating device, or a resistance coil heating device, etc.

[0101] 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 the gas flowing through the air duct 21 for heat exchange; or the heater 23 can 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.

[0102] In this embodiment, the fan 22, the air duct 21 and the heater 23 constitute the internal circulation component 2 of the cleaning equipment. The internal circulation component 2 is used to circulate and heat the gas in the cleaning chamber 11, and to provide the heat required for drying tableware and the airflow speed required for convection.

[0103] The exhaust assembly 4 is a component capable of creating normal or negative pressure in the cleaning chamber 11. The exhaust assembly 4 can be a fluid machine with exhaust function, such as an exhaust fan 22 or an air pump. During hot air drying in the cleaning chamber 11, the exhaust assembly 4 is used to expel the evaporated or volatilized water vapor from the cleaning chamber 11 along with the gas, thereby reducing the relative humidity of the air inside the cleaning chamber 11 and facilitating the evaporation of more residual water.

[0104] The air outlet 212 of the air duct 21 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 connected to the cleaning chamber 11. 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 along with the gas into the cleaning chamber 11.

[0105] The gas heated by heater 23 is discharged into the cleaning chamber 11 from the air outlet 212 of air duct 21. At least part of the hot gas is discharged from the cleaning chamber 11 from the air inlet 41 of exhaust assembly 4 along with water vapor. The flow path of at least part of the hot gas is from the air outlet 212 of air duct 21 to the air inlet 41 of exhaust assembly 4.

[0106] The internal circulation component 2 and the exhaust component 4 can be operated by starting together or by starting separately.

[0107] When only the internal circulation component 2 is running, 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 evaporate and dry faster through heat transfer and convection heat exchange, which is beneficial to the drying of the entire cleaning chamber 11 and reduces drying dead zones.

[0108] When only the exhaust component 4 is working, due to the lack of external air supply, the cleaning chamber 11 is drawn into a negative pressure state by the exhaust component 4, and the negative pressure environment also helps to improve the drying rate.

[0109] When the internal circulation component 2 and the exhaust component 4 work simultaneously, the fan 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 uniform drying effect of the whole chamber.

[0110] According to the cleaning equipment provided in this application embodiment, an internal circulation component 2 is provided, including an air duct 21, a fan 22, and a heater 23. The air inlet 211 and air outlet 212 of the air duct 21 are both connected to the cleaning chamber 11. Gas in the cleaning chamber 11 is drawn into the air duct 21 by the fan 22 through the air inlet 211. The hot air, heated by the heater 23, enters the cleaning chamber 11 from the air outlet 212. The dry gas in the cleaning chamber 11 is circulated and heated by the heater 23 to achieve hot air drying of the tableware in the cleaning chamber 11. Compared to cleaning equipment that uses external circulation for hot air drying, the internal circulation drying mode improves the utilization rate of hot air heat energy, reduces the energy consumption of the cleaning equipment's hot air drying mode, and achieves energy saving.

[0111] In some embodiments, when the exhaust assembly 4 is in operation, the exhaust volume of the exhaust assembly 4 is not less than the amount of gas entering the cleaning chamber 11 from the outside.

[0112] It should be noted that in actual use, it is impossible to completely seal the cleaning chamber 11. There is still a small amount of gas exchange between the cleaning chamber 11 and the outside. When the exhaust volume of the exhaust component 4 is not less than the amount of gas entering the cleaning chamber 11 from the outside, the cleaning chamber 11 is in a normal pressure or negative pressure environment. The negative pressure environment helps to improve the drying rate.

[0113] In this embodiment, when only the exhaust component 4 is working, due to the lack of sufficient replenishment of outside air, the cleaning chamber 11 is drawn into a negative pressure state by the exhaust component 4, and the negative pressure environment helps to improve the drying rate.

[0114] When the internal circulation component 2 and the exhaust component 4 work simultaneously, the fan 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 uniform drying effect of the whole chamber.

[0115] In some embodiments, as shown in Figures 1 and 4, the air duct 21 includes a makeup air branch 213. The makeup air inlet 2131 of the makeup air branch 213 is connected to the outside, and the makeup air outlet of the makeup air branch 213 is connected to the clean chamber 11. When the exhaust assembly 4 and the fan 22 are working, the exhaust volume of the exhaust assembly 4 is not less than the makeup air volume of the makeup air branch 213.

[0116] The air duct 21 includes two branches: an internal circulation branch and an external circulation branch. The air supply inlet 2131 of the air supply branch 213 is connected to the outside, and the air supply outlet of the air supply branch 213 is connected to the clean chamber 11. The arrangement of the air supply branch 213 forms the external circulation branch of the clean chamber 11. The branch with an air inlet 211 and an air outlet 212 connected to the clean chamber 11 belongs to the internal circulation branch, as shown in Figure 5. Hollow arrows indicate external circulation, and solid arrows indicate internal circulation.

[0117] By setting up the make-up air branch 213, external circulation and / or internal circulation of the cleaning chamber 11 can be achieved, thereby realizing multiple working modes of the cleaning equipment.

[0118] When only the fan 22 is working, in order to maintain the pressure balance inside the cleaning chamber 11, the fan 22 will draw in as little air as possible from the cleaning chamber 11 to achieve basic internal circulation. At this time, the air volume of the internal circulation is much greater than that of the external circulation, which can quickly increase the temperature and humidity inside the cleaning chamber 11. When the fan 22 and the exhaust assembly 4 are working at the same time, the exhaust assembly 4 will draw out the air from the cleaning chamber 11. At this time, the fan 22 will mainly introduce outside air, and a small amount of air inside the chamber will be drawn in for circulation. At this time, internal and external circulation are carried out simultaneously, which can effectively improve the rapid dehumidification requirements of the dehumidification stage.

[0119] When the exhaust assembly 4 and the fan 22 are working, the exhaust volume of the exhaust assembly 4 is not less than the air supply volume of the air supply branch 213. That is, when the exhaust assembly 4 is turned on, the clean chamber 11 is drawn to normal pressure or negative pressure by the exhaust assembly 4. In other words, when the air supply branch 213 supplies air, the clean chamber 11 is at normal pressure or negative pressure, and when the air supply branch 213 does not supply air, the clean chamber 11 is at negative pressure.

[0120] In related technologies, the single internal circulation scheme helps to circulate and heat the gas to be dried in the cleaning chamber 11 to 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, the lack of external gas introduction will cause the exhaust component 4 to gradually draw the cleaning chamber 11 into negative pressure. The negative pressure causes the exhaust rate to gradually decrease, resulting in the overall dehumidification rate of the cleaning equipment not being improved well.

[0121] By setting up a make-up air branch 213, this application can maintain the air pressure balance in the cleaning chamber 11 when the exhaust assembly 4 is working, reduce the vacuum degree in the cleaning chamber 11, thereby maintaining a high exhaust rate, quickly expelling water vapor in the cleaning chamber 11, improving the overall dehumidification rate and drying rate of the cleaning equipment, and further reducing the energy consumption of hot air drying.

[0122] In some embodiments, as shown in Figures 1, 2 and 4, the center of the air inlet 211 and the center of the air outlet 212 are offset in the front-rear direction of the cleaning device.

[0123] The center of the air inlet 211 can be close to the front of the cleaning equipment, and the center of the air outlet 212 can be close to the rear of the cleaning equipment; or, the center of the air inlet 211 can be close to the rear of the cleaning equipment, and the center of the air outlet 212 can be close to the front of the cleaning equipment, so as to extend the path of hot air flow in the cleaning chamber 11, improve the utilization efficiency of hot air heat energy, and at the same time improve the uniformity of gas mixing in the cleaning chamber 11 and reduce drying dead zones.

[0124] In some embodiments, as shown in Figures 5 and 6, 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 on the lower side of the cleaning chamber 11.

[0125] The air inlet 211 of the air duct 21 can be located at the center of the top wall 12 of the clean chamber 11 or near the edge of the top, and the air outlet 212 of the air duct 21 can be located at the lower part of the adjacent side near the bottom.

[0126] Inside the cleaning chamber 11, the airflow circulates upwards from the bottom of the cleaning chamber 11. On the one hand, the airflow direction can improve the uniformity of temperature distribution inside the cleaning chamber 11, which is beneficial for drying the entire chamber and reducing drying dead zones. On the other hand, it can reduce the amount of water vapor entering the internal circulation components 2, such as the air duct 21, fan 22, and heater 23, through the air inlet 211, thus protecting the internal circulation components 2.

[0127] In some embodiments, as shown in FIG7, 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 entire cleaning equipment, which can reduce the impact of the air inlet 211 on the pushing and pulling of the dish rack 5, thereby increasing the depth of the dish rack 5 and increasing the capacity of the dish rack 5.

[0128] In some embodiments, as shown in FIG6, the air inlet 211 of the air duct 21 is located in the area of ​​the top wall 12 of the cleaning chamber 11 near the side and back plate 14.

[0129] 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 impact of the air inlet 211 on the pushing and pulling of the dish basket 5, thereby increasing the depth and width of the dish basket 5 and increasing the capacity of the dish basket 5.

[0130] In some embodiments, as shown in FIG7, the cleaning chamber 11 has a first side 111 and a second side 112 disposed opposite to each other, 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.

[0131] In this embodiment, as shown in FIG9, 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 first side 111 and the second side 112 opposite to each other. The air inlet 211 is located near the second side 112 where the air outlet 212 is located, that is, the air inlet 211 is far away from the exhaust assembly 4.

[0132] By placing the exhaust assembly 4 and the air outlet 212 on opposite sides and setting the air inlet 211 away from the exhaust assembly 4, the path of the gas heated by the heater 23 in the cleaning chamber 11 can be extended when the exhaust assembly 4 and the fan 22 are working simultaneously. This improves the utilization efficiency of hot air energy, reduces the energy consumption of the hot air drying mode of the cleaning equipment, and achieves energy saving. At the same time, it improves the uniformity of gas mixing in the cleaning chamber 11 and reduces drying dead zones.

[0133] In some embodiments, as shown in Figures 7 and 8, the fan 22 is installed above the top wall 12 of the inner liner 1, and at least a portion of the air duct 21 is located above the top wall 12 and outside the side wall 13 of the inner liner 1.

[0134] The air inlet 211 is located above the top wall 12 of the inner liner 1, and the air outlet 212 is located on the side wall 13 of the inner liner 1. At least part of the air duct 21 is bent. The bending angle of the air duct 21 can be determined according to the included angle between the top wall 12 and the side wall 13 of the inner liner 1. For example, the bending angle can be 90° to connect the air outlet 212 and the air inlet 211 located on different surfaces.

[0135] The air duct 21 is located on the outside of the inner liner 1, without encroaching on the internal space of the cleaning chamber 11, thereby increasing the capacity of the cleaning chamber 11.

[0136] The fan 22 can be installed above the top wall 12 of the cleaning chamber 11. The suction side of the fan 22 faces the inside of the cleaning chamber 11. When the fan 22 is running, it can introduce the high-temperature air in the upper part of the cleaning chamber 11 into the lower part of the cleaning chamber 11 through the air duct 21, which is beneficial to the uniformity of temperature distribution in the entire cleaning chamber 11.

[0137] In practical use, when the cleaning equipment is matched with an automatic door opening or automatic door closing scheme as the main means of dehumidification, the hot air in the cleaning chamber 11 will move to the upper and rear of the cleaning chamber 11 due to natural convection. The installation position of the air inlet 211 and the fan 22 can prevent a large amount of hot and humid air from remaining in the upper part of the cleaning chamber 11, reduce the drying dead corners, and help improve the overall drying effect and rate.

[0138] In this embodiment, the fan 22 can be installed above the top wall 12 of the cleaning chamber 11. The thickness of the fan 22 is not less than 20mm. For example, the thickness of the fan 22 can be 5mm, 10mm, 15mm or 18mm. By setting the thickness of the fan 22, it can be adapted to various sizes between the top wall 12 of the inner liner 1 and the outer shell of the cleaning equipment, thereby increasing the circulating air volume, thereby increasing the power of the heater 23 and the drying effect.

[0139] In some embodiments, the fan 22 may also be installed below the bottom wall 16 of the inner liner 1.

[0140] It should be noted that the distance from the bottom plate of the cleaning equipment to the ground is greater than the distance from the top plate of the outer shell. In other words, the installation space under the bottom plate of the cleaning equipment is greater than the installation space under the top plate, which allows for the installation of a larger fan 22. Under the same noise level, the air circulation volume can be further increased, which is beneficial to the overall drying effect and shortens the drying time.

[0141] In some embodiments, as shown in FIG8, the fan 22 includes: an upper shell 221, an impeller 222 and a motor assembly, the motor assembly being dynamically coupled to the impeller 222, the upper shell 221 being connected to the air duct 21 to form a receiving cavity, and the impeller 222 being mounted in the receiving cavity.

[0142] The air duct 21 includes a bottom shell, and a fan mounting position 2146 matching the size of the upper shell 221 is provided inside the air duct 21. The upper shell 221 is connected to the bottom shell of the air duct 21 to form a receiving cavity. The fan 22 can retain only the upper shell 221, impeller 222 and motor assembly. The bottom shell of the air duct 21 serves as the lower shell of the fan 22. Through the assembly structure of the fan 22 and the air duct 21, the installation space of the fan 22 can be increased and the power of the fan 22 that can be installed can be increased.

[0143] In this embodiment, the fan 22 is installed above the top wall 12 of the inner liner 1. The fan 22 can retain only the upper shell 221, impeller 222 and motor assembly, omitting the original lower shell of the fan 22, reducing the overall size of the fan 22, and allowing a larger model of fan 22 to be installed in the same space. Furthermore, the lower shell of the fan 22 is replaced by the air duct 21, and the impeller 222 is directly installed in the air duct 21, increasing the air intake area of ​​the air inlet 211 and increasing the air intake volume.

[0144] In some embodiments, a sealing device 25 is provided between the fan 22 and the air duct 21. The sealing device 25 can be a sealing ring, tape, or filler, etc., to seal the gap between the inner liner 1 of the cleaning equipment, the fan 22, and the air duct 21.

[0145] Meanwhile, the entire impeller 222 and motor assembly are enclosed between the air duct 21 and the upper shell 221 of the fan 22, with a sealed middle section. During the entire operation of the cleaning equipment, the inner liner 1, fan 22 and air duct 21 of the cleaning equipment are enclosed spaces, which can reduce the amount of water vapor leaking out through the gap between the fan 22 and the air duct 21 at each stage, thus reducing potential hazards.

[0146] In some embodiments, as shown in FIG3, the air inlet 211 and air outlet 212 of the air duct 21 are both provided with sealing devices 25 and nuts. The nuts are tightened in a snap-fit ​​manner to compress the sealing devices 25. The sealing devices 25 are located between the air duct 21 and the inner liner 1 to reduce water leakage from the cleaning chamber 11 through the gap between the air duct 21 and the inner liner 1, reduce the risk of water leakage, and improve the reliability of the cleaning equipment.

[0147] The sealing device 25 can be a sealing ring or a sealing strip.

[0148] In some embodiments, as shown in Figures 12 and 13, the cleaning device further includes: a side plate 3, a heater 23 installed in the area of ​​the air duct 21 located on the side of the inner liner 1, the side plate 3 being installed on the side wall 13 of the inner liner 1, and the side plate 3 covering at least a portion of the air duct 21.

[0149] In this embodiment, the side plate 3 is installed on the outside of the side wall 13 of the inner liner 1, the inner side of the side plate 3 is spaced apart from the air duct 21, and the inner side of the side plate 3 is spaced apart from the heater 23.

[0150] The heater 23 and at least part of the air duct 21 are located between the side plate 3 and the inner liner 1. The side plate 3 can protect the heater 23 and at least part of the air duct 21, and at the same time reduce the risk of people touching high-voltage components and high-temperature heating components, thus improving safety.

[0151] In some embodiments, as shown in FIG13, the inner side surface of the side plate 3 is spaced apart from the air duct 21, and the distance between them is c, wherein the distance c satisfies: c≥2mm.

[0152] The distance c between the inner side of the side plate 3 and the air duct 21 can be 2mm, 4mm, 7mm or wider.

[0153] In other words, the side plate 3 is installed on the outside of the side wall 13 of the inner liner 1, and the inner side of the side plate 3 is spaced apart from the air duct 21 and the heater 23.

[0154] It is understandable that a heater 23 is installed in the area of ​​the side wall 13 of the air duct 21 located in the inner liner 1. In some embodiments, the air duct 21 is also equipped with components such as a thermostat 29. The heating tube will generate a large amount of heat, and both the heating tube and the thermostat 29 contain high-voltage terminals, which are directly connected to high voltage.

[0155] With grounding ensured, by installing side plate 3 and setting the distance between the inner side of side plate 3 and air duct 21, on the one hand, the side plate 3 can be prevented from directly contacting high voltage and high temperature heating components, thus improving the safety of the cleaning equipment; on the other hand, the temperature of the outer wall of side plate 3 can be controlled within a safe range, reducing the risk of burns to people who come into contact with side wall 13. In the embedded installation of cleaning equipment, the high temperature of side plate can reduce the damage to the inner wall of the installation cabinet.

[0156] In some embodiments, the power of heater 23 is P, which satisfies: P≤500W.

[0157] The power P of heater 23 can be 150W, 200W, 350W, 400W or 500W, and the specific power can be determined according to the usage.

[0158] In related technologies, cleaning equipment with external circulation hot air drying mode is limited by installation location, and the size of the fan 22 and the power of the heater 23 are relatively small. Hot air drying can only be used as an auxiliary energy source, while high-temperature rinsing is the main energy source. Therefore, hand-washed tableware needs to be dried for a considerable period of time, which is inconvenient.

[0159] This application utilizes an internal circulation hot air drying mode, increases the power of heater 23, and sets the power of heater 23 to P. Hot air drying can be used as the main energy source, while high-temperature rinsing can be converted into an auxiliary energy source, significantly shortening the drying time of tableware and improving convenience.

[0160] In some embodiments, as shown in Figures 10 and 11, the cleaning device further includes a water baffle 24, which is installed at the air inlet 211.

[0161] The water baffle 24 has both ventilation and water-blocking functions. It can be positioned between the fan 22 and the cleaning chamber 11, with the water baffle 24 located within the cleaning chamber 11. When the fan 22 is on, it can pass through the water baffle 24 to draw gas from the cleaning chamber 11 into the fan mounting position 2146. Simultaneously, the water baffle 24 reduces the direct impact and splashing of water onto the fan 22 and heater 23 within the air duct 21, providing protection.

[0162] The water baffle 24 can be connected to the air inlet 211 by means of threaded connection, plug-in connection, pivot connection or snap-on connection.

[0163] In some embodiments, as shown in FIG3, the air outlet 212 is provided with a grille 2156.

[0164] Among them, the grille 2156 is used to guide the airflow. The grille 2156 can introduce the airflow from the air outlet 212 in different directions. The airflow direction of the grille 2156 can be determined according to the installation position of the exhaust component 4 and the installation position of the air inlet 211 of the air duct 21.

[0165] For example, if the air inlet 211 of the air duct 21 is located on the top wall 12 of the cleaning chamber 11, the grille 2156 can appropriately guide the hot air to the direction below the cleaning chamber 11, thereby extending the flow path of the hot air in the cleaning chamber 11, increasing the area through which the gas heated by the heater 23 flows through the entire cleaning chamber 11, and improving the drying effect of the entire chamber and dead corners of the cleaning chamber 11.

[0166] For example, if the exhaust assembly 4 is located on the upper left side of the cleaning chamber 11, the grille 2156 can appropriately guide the hot air to the lower rear side of the cleaning chamber 11, thereby extending the flow path of the hot air in the cleaning chamber 11, increasing the area through which the gas heated by the heater 23 flows through the entire cleaning chamber 11, improving the drying effect of the entire chamber and dead corners of the cleaning chamber 11, and reducing the amount of hot air discharged by the exhaust assembly 4 without being utilized, thus increasing the utilization efficiency of the hot air thermal energy.

[0167] Among them, the grille 2156 can also reduce the direct impact of water flow on the air duct 21, thus protecting the air duct 21.

[0168] In some embodiments, the cleaning equipment has at least the following operating modes:

[0169] Firstly, the cleaning equipment has an internal circulation drying working mode.

[0170] In the internal circulation drying mode, the fan 22 and heater 23 operate, while the exhaust assembly 4 is shut down. The gas in the cleaning chamber 11 is drawn into the air duct 21 by the fan 22 through the air inlet 211. The hot air, heated by the heater 23, enters the cleaning chamber 11 through 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 evaporate and dry faster through heat transfer and convection heat exchange, which is beneficial for drying the entire cleaning chamber 11 and reducing drying dead zones.

[0171] Secondly, the cleaning equipment has a dehumidification negative pressure working mode;

[0172] In the dehumidification negative pressure working mode, the fan 22 and heater 23 stop, and the exhaust assembly 4 operates. Due to the lack of outside air supply, the cleaning chamber 11 is drawn into a negative pressure state by the exhaust assembly 4, and the negative pressure environment also helps to improve the drying rate.

[0173] Thirdly, the cleaning equipment has a mixed working mode;

[0174] In the mixed operating mode, the fan 22, heater 23, and exhaust assembly 4 all operate. The fan 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 uniform drying effect of the entire chamber;

[0175] Fourth, the cleaning equipment has a mixed dehumidification working mode;

[0176] In the mixed dehumidification mode, both the fan 22 and the exhaust assembly 4 are working, while the heater 23 is off, thereby achieving simultaneous mixing and dehumidification of the air in the clean chamber 11, further improving the uniform dehumidification effect throughout the chamber.

[0177] As shown in Figures 14 and 15, the cleaning equipment in this embodiment of the application also includes an air duct structure, which includes an upper air duct 214, a flexible connector 217, and a lower air duct 215.

[0178] The upper air duct 214 is provided with an air inlet 211 of the air duct structure; one end of the flexible connector 217 is connected to the lower port of the upper air duct 214; the upper port of the lower air duct 215 is connected to the other end of the flexible connector 217, and the lower air duct 215 is provided with an air outlet 212 of the air duct structure; wherein, the air inlet 211 and the air outlet 212 are not coplanar.

[0179] In this system, gas enters the duct structure through the air inlet 211 and flows sequentially through the upper duct 214, the flexible connector 217, and the lower duct 215, finally exiting through the air outlet 212. The air inlet 211 of the duct structure is connected to the air inlet 41 of the fan 22.

[0180] The flexible connector 217 is connected to the lower port of the upper air duct 214 and the upper port of the lower air duct 215 at both ends. The flexible connector 217 can be connected to the lower port of the upper air duct 214 and the upper port of the lower air duct 215 through detachable connection methods such as plug-in connection, clamp connection or fixture connection.

[0181] The flexible connector 217 can be a connection structure with deformable properties, such as a flexible joint made of one or more of the following materials: metal, plastic and rubber.

[0182] By setting the flexible connector 217 to be detachably connected to the lower port of the upper air duct 214 and the upper port of the lower air duct 215, it is easy to replace the upper air duct 214 and the lower air duct 215 with different types and sizes. Furthermore, the angle between the upper air duct 214 and the lower air duct 215 can be changed by bending the flexible connector 217, so that the air duct structure can be installed in the inner tank 1 of cleaning equipment of various heights.

[0183] In related technologies, in order to extend the circulation path of hot air in the hot air drying process of the cleaning chamber 11, make full use of the thermal energy of the hot air, and improve the drying effect of the entire chamber and dead corners of the cleaning chamber 11, the mounting plane of the fan 22 and the internal circulation outlet of the cleaning chamber 11 are usually set on different surfaces of the cleaning chamber 11. However, the applicant has found through research that when the mounting plane of the fan 22 and the internal circulation outlet of the cleaning chamber 11 are located on different surfaces, tolerance and sealing problems will occur when the cleaning chamber 11 is assembled with the air duct structure, resulting in assembly difficulty and poor later use effect.

[0184] The air duct structure of this embodiment features a split structure of upper air duct 214 and lower air duct 215, connected by a flexible connector 217. The air inlet 211 and air outlet 212 of the air duct structure are not coplanar, which allows it to be adapted to cleaning equipment where the mounting plane of the fan 22 and the internal circulation outlet of the cleaning chamber 11 are located on different planes. When assembling with the cleaning equipment, the tolerances generated in the production process of the inner liner 1 can be compensated by replacing the upper air duct 214 and lower air duct 215 with different lengths and sizes, reducing assembly difficulty. At the same time, it can be adapted to cleaning equipment of different heights, improving the reliability and application scenarios.

[0185] In some embodiments, as shown in FIG16, the upper air duct 214 includes a horizontal section 2141 and a lower connecting section 2142 connected to the horizontal section 2141 and extending downward. The lower surface of the horizontal section 2141 is provided with an air inlet 211, and a flexible connector 217 is connected to the lower connecting section 2142.

[0186] The horizontal section 2141 and the lower connecting section 2142 are located on different sides of the cleaning chamber 11. By setting the downward extending lower connecting section 2142, the upper air duct 214 can be distributed on different sides, thereby adapting to cleaning equipment where the installation plane of the fan 22 and the internal circulation outlet of the cleaning chamber 11 are located on different sides.

[0187] In some embodiments, as shown in FIG16, the upper surface of the upper air duct 214 has an opening for installing the fan 22; the flexible connector 217 includes a cover plate 2171 and a sleeve 2172 connected together, the two ends of the sleeve 2172 being sleeved to the lower port of the upper air duct 214 and the upper port of the lower air duct 215 respectively, and the cover plate 2171 covering the upper air duct 214 and closing the opening.

[0188] In this embodiment, the lower surface of the upper air duct 214 and the cover plate 2171 form a cavity for installing the fan 22. The cover plate 2171 can be connected to the opening of the upper air duct 214 by means of plug-in connection, snap-on connection or bolt connection.

[0189] Among them, the sleeve 2172 can be a connecting pipe made of rubber or plastic, and the two ends of the sleeve 2172 are respectively connected to the lower port of the upper air duct 214 and the upper port of the lower air duct 215.

[0190] In some embodiments, the two ends of the sleeve 2172 are respectively sleeved to the upper port of the connecting section and the lower air duct 215, and at least a portion of the cover plate 2171 is connected to the horizontal section 2141 and closes the opening.

[0191] The cover plate 2171 and the sleeve 2172 have at least two of the following structural forms:

[0192] Firstly, the cover plate 2171 is completely located on the side of the fan 22 located in the cleaning chamber 11. The cover plate 2171 can be completely connected to the horizontal section 2141 of the upper air duct 214. At least a portion of the sleeve 2172 extends into the side of the fan 22 located in the cleaning chamber 11 and is connected to the cover plate 2171.

[0193] At least a portion of the sleeve 2172 is a flexible structure, so that one end of the sleeve 2172 can be bent and deformed toward the side of the cleaning chamber 11 where the upper port of the lower air duct 215 is located, and the other end can be bent and deformed toward the other side of the cleaning chamber 11 where the lower port of the upper air duct 214 is located, so that the sleeve 2172 can be fitted with the lower port of the upper air duct 214 and the upper port of the lower air duct 215.

[0194] Secondly, a portion of the cover plate 2171 covers the upper surface of the upper air duct 214, and a portion covers the curved portion of the upper air duct 214 extending to the side.

[0195] In this embodiment, part of the cover plate 2171 is located on the side of the fan 22 located in the cleaning chamber 11, and another part of the cover plate 2171 covers the curved portion of the upper air duct 214 extending to the side.

[0196] In this embodiment, at least a portion of the cover plate 2171 is a flexible structure, so that after the two ends of the sleeve 2172 are respectively fitted with the lower port of the upper air duct 214 and the upper port of the lower air duct 215 on one side of the cleaning chamber 11, the cover plate 2171 can be bent and deformed toward the other side where the fan 22 is located, so as to cover the upper air duct 214 and close the opening.

[0197] In some embodiments, the two ends of the sleeve 2172 are respectively press-fitted with the lower port of the upper air duct 214 and the upper port of the lower air duct 215 to improve the sealing performance of the connection between the two ends of the sleeve 2172 and the lower port of the upper air duct 214 and the upper port of the lower air duct 215.

[0198] In some embodiments, as shown in Figures 16 and 17, the sidewall 13 of the upper air duct 214 is provided with a first connecting structure 2143, and the cover plate 2171 is provided with a second connecting structure 21711. The first connecting structure 2143 is connected to the second connecting structure 21711.

[0199] The side wall 13 of the upper air duct 214 is assembled with the cover plate 2171. The side wall 13 of the upper air duct 214 can be connected to the cover plate 2171 by means of bolt connection, snap connection or plug-in connection.

[0200] When the side wall 13 of the upper air duct 214 is connected to the cover plate 2171 by a plug-in connection, one of the first connection structure 2143 and the second connection structure 21711 is a plug, and the other of the first connection structure 2143 and the second connection structure 21711 is a socket. The plug is inserted into the socket to connect the side wall 13 of the upper air duct 214 and the cover plate 2171 together.

[0201] When the side wall 13 of the upper air duct 214 is connected to the cover plate 2171 by a snap-fit ​​connection, one of the first connecting structure 2143 and the second connecting structure 21711 is a fixed snap-fit, and the other of the first connecting structure 2143 and the second connecting structure 21711 is a connector 2422. The connector 2422 is inserted into the fixed snap-fit ​​to lock the side wall 13 of the upper air duct 214 and the cover plate 2171 together.

[0202] In some embodiments, the first connecting structure 2143 cooperates with the second connecting structure 21711. Multiple first connecting structures 2143 may be provided, and the number of second connecting structures 21711 is adapted to the number of first connecting structures 2143 to increase the stability of the connection between the side wall 13 of the upper air duct 214 and the cover plate 2171.

[0203] In some embodiments, the upper cover plate 2171 is made of rubber, and the upper half of the upper cover plate 2171 can be bent to cover the upper surface of the air duct 21, thereby reducing problems such as vibration of the motor assembly of the fan 22, vibration between the fan 22 and the top outer plate, and aerodynamic issues generated by the fan 22, and effectively reducing the noise level of the cleaning equipment during operation.

[0204] In some embodiments, as shown in FIG15, the downdraft duct 215 includes: a main body 2158 and a cover 2157; the upper end of the main body 2158 is connected to a flexible connector 217, at least a portion of the outer side of the main body 2158 is open, and an air outlet 212 is provided; the cover 2157 is connected to the main body 2158 and closes the open portion of the outer side of the main housing, and the cover 2157 is made of a flexible material.

[0205] In this embodiment, the main body 2158 can be made of a lightweight material, such as rigid plastic or metal; the cover 2157 can be made of a flexible material, such as rubber or plastic.

[0206] The main body 2158 and the cover 2157 can be connected by means of plug-in connection, clamp connection or fixture connection, so as to facilitate disassembly and replacement.

[0207] By combining the main body 2158 of the downdraft 215 made of rigid material with the cover 2157 made of flexible material, a better sealing effect can be achieved. Furthermore, the overall downdraft 215 can reduce the risk of air and water leakage and improve the reliability of the duct structure.

[0208] In some embodiments, a sealing strip may be provided between the main body 2158 and the cover 2157 to further improve the sealing performance between the main body 2158 and the cover 2157 and improve the reliability of the air duct structure.

[0209] In some embodiments, as shown in FIG19, the main body 2158 includes an upper connecting section 21581 and an air duct shell 21582.

[0210] The lower end of the flexible connector 217 is fitted onto the upper connecting section 21581; the air duct shell 21582 is connected to the upper connecting section 21581, the outer side of the air duct shell 21582 is open and has an air outlet 212, and the cover 2157 covers the air duct shell 21582.

[0211] The lower end of the flexible connector 217 and the upper connecting section 21581 can be an interference fit to improve the sealing performance of the connection between the lower end of the flexible connector 217 and the upper connecting section 21581.

[0212] In some embodiments, as shown in Figures 15 and 18, the outer peripheral wall of the upper connecting segment 21581 is provided with a third connecting structure 21583, the lower end of the flexible connector 217 is provided with a clearance hole 2173, and the cover 2157 is provided with a fourth connecting structure 21571. The third connecting structure 21583 passes through the clearance hole 2173 and is connected to the fourth connecting structure 21571.

[0213] The third connecting structure 21583 and the fourth connecting structure 21571 can be connected by snap-fit, threaded or plug-in.

[0214] The third connecting structure 21583 can be connected and fixed between the flexible connector 217 and the upper connecting section 21581 by passing through the clearance hole 2173. The third connecting structure 21583 can be connected to the fourth connecting structure 21571 by passing through the clearance hole 2173, which can connect and fix the upper connecting section 21581, the cover 2157 and the flexible connector 217.

[0215] When the third connecting structure 21583 and the fourth connecting structure 21571 are connected by a snap fastener, the third connecting structure 21583 can be a fixed snap fastener, and the fourth connecting structure 21571 can be a sliding snap fastener. When the lower end of the flexible connector 217 is sleeved on the upper connecting section 21581, the third connecting structure 21583 passes through the clearance hole 2173. At least a part of the third connecting structure 21583 can extend out from the clearance hole 2173, which can connect and fix the flexible connector 217 and the upper connecting section 21581. The fourth connecting structure 21571 slides into the third connecting structure 21583, which can connect and fix the upper connecting section 21581, the cover 2157 and the flexible connector 217.

[0216] When the third connecting structure 21583 and the fourth connecting structure 21571 are connected by threads, the third connecting structure 21583 can be a protrusion with a threaded hole, and the fourth connecting structure 21571 can be a structure with connecting parts 2422 such as bolts, studs, and screws. When the lower end of the flexible connecting part 217 is sleeved on the upper connecting section 21581, the third connecting structure 21583 passes through the relief hole 2173, and the threaded hole of the third connecting structure 21583 can extend out from the relief hole 2173. The fourth connecting structure 21571 is threadedly connected to the third connecting structure 21583.

[0217] In some embodiments, as shown in FIG19, the air duct housing 21582 is provided with a heater mounting position 21585 for mounting the heater 23 and a thermostat mounting position 21586 for mounting the thermostat 29.

[0218] The heater mounting position 21585 is used to install the heater 23, which can be installed via a plug-in connection, threaded connection, or snap-fit ​​connection. The heater 23 is configured to heat the gas flowing through the downdraft duct 215 when it is turned on.

[0219] Thermostat mounting position 21586 is used to install thermostat 29. Thermostat 29 can be installed in thermostat mounting position 21586 by means of plug-in connection, threaded connection or snap-fit ​​connection. Thermostat 29 is used to detect the temperature in the downdraft duct 215 and control the overall operating status of the cleaning equipment according to the detected temperature result.

[0220] The heater mounting position 21585 and the thermostat mounting position 21586 are both located inside the air duct housing 21582, meaning that the heater 23 and the thermostat 29 are installed in the same space.

[0221] In some embodiments, as shown in FIG19, the heater mounting position 21585 and the temperature controller mounting position 21586 are installed sequentially along the gas flow direction so that the gas flow is heated by the heater 23 and then the temperature is measured by the temperature controller 29.

[0222] By installing both the temperature controller 29 and the heater 23 inside the air duct housing 21582, the temperature controller 29 can monitor the temperature inside the air duct housing 21582 in real time. In the event of sudden stall or damage to the fan 22, the temperature controller 29 can detect the abnormal temperature in time and control the cleaning equipment to stop working, which can effectively reduce risks and improve the safety of the cleaning equipment.

[0223] In some embodiments, as shown in FIG15, a heat spreader 21584 is installed inside the air duct housing 21582. The heat spreader 21584 can be connected to the air duct housing 21582 by threaded connection, plug-in connection or snap-fit ​​connection. The heat spreader 21584 can be a quartz heating plate, a ceramic heating plate or a metal heating element, etc.

[0224] The heat spreader 21584 is disposed inside the air duct shell 21582 and located on the side of the heater mounting position 21585 opposite to the inner liner 1. The heat spreader 21584 is in direct contact with the interior of the air duct shell 21582. Due to the good thermal conductivity of the heat spreader 21584, the local high temperature near the heater 23 can be quickly diffused to the surrounding area, which can reduce the occurrence of local high temperature inside the air duct shell 21582. At the same time, it can also reduce the damage to people or built-in cabinets caused by excessively high temperature on the outside of the air duct shell 21582.

[0225] In some embodiments, as shown in FIG20, the downdraft 215 is provided with a heater mounting position 21585, and an expansion section 2154 is provided between the inlet end of the downdraft 215 and the heater mounting position 21585. The flow area of ​​the expansion section 2154 gradually increases from one end near the inlet end of the downdraft 215 to the other end near the heater mounting position 21585.

[0226] The downdraft duct 215 includes a heater mounting position 21585 and an inlet end of the downdraft duct 215. The flow area of ​​the inlet end of the downdraft duct 215 is smaller than the flow area of ​​the heater mounting position 21585. The heater mounting position 21585 is located behind the inlet end of the downdraft duct 215. The airflow flows from the inlet end of the downdraft duct 215 to the heater mounting position 21585.

[0227] The heater mounting position 21585 is used to install the heater 23, which is configured to heat the gas flowing through the lower air duct 215 when it is turned on. The fan 22 can be installed at or near the inlet end of the lower air duct 215 to draw gas from the inlet end of the lower air duct 215 into the lower air duct 215 and drive the gas to flow along the lower air duct 215 to the heater mounting position 21585.

[0228] In this embodiment, the expansion segment 2154 can be axially symmetrical, or it can be tilted on one side and vertical on the other, or it can be tilted on both sides but with different tilt angles. The specific shape can be set according to the actual use scenario.

[0229] According to the embodiment of this application, the downdraft 215 is provided with an expansion section 2154 between the inlet end of the downdraft 215 and the heater mounting position 21585. The flow area of ​​the expansion section 2154 gradually increases from the end near the inlet end of the downdraft 215 to the end near the heater mounting position 21585. On the one hand, it can reduce the speed of the airflow entering from the inlet end of the downdraft 215, prolong the contact time between the gas and the heater 23, and increase the heating effect. On the other hand, it can make the airflow more evenly blow onto the surface of the heater 23, reduce the phenomenon of local high temperature, and improve the safety and reliability of the downdraft 215.

[0230] In some embodiments, as shown in FIG20, the front sidewall 13 of the expansion section 2154 is inclined forward from one end near the inlet end of the downdraft duct 215 to the end near the heater mounting position 21585.

[0231] The front sidewall 13 of the expansion section 2154 has an angle with the vertical direction so that the flow area at the inlet end of the lower air duct 215 is smaller than the flow area of ​​the heater mounting position 21585 below. After the airflow flows out from the outlet of the fan 22, the air velocity can be reduced and the pressure can be increased by expanding the flow area, so that the air volume can be blown to the heater 23 more evenly, reducing the local high temperature limiting the power of the heater 23, and playing the role of pressure diversion and flow stabilization.

[0232] In some embodiments, as shown in FIG20, the inclination angle between the front sidewall 13 of the expansion section 2154 and the vertical direction is γ, satisfying: 10°≤γ≤45°.

[0233] The angle γ between the front sidewall 13 of the expansion section 2154 and the vertical direction can be 10°, 20°, 30° or 45°, which can be set according to the actual use scenario.

[0234] By setting the angle range between the front sidewall 13 of the expansion section 2154 and the vertical direction, the air volume can be better distributed evenly, which helps the air volume to pass evenly across the cross section of the heater 23 below, reducing local overheating and limiting the power of the heater 23.

[0235] In some embodiments, a thermostat mounting position 21586 for mounting a thermostat 29 is provided in the downdraft duct 215.

[0236] Thermostat mounting position 21586 is used to install thermostat 29. Thermostat 29 can be installed in thermostat mounting position 21586 by means of plug-in connection, threaded connection or snap-fit ​​connection. Thermostat 29 is used to detect the temperature in the downdraft duct 215 and control the overall operating status of the cleaning equipment according to the detected temperature result.

[0237] By installing both the thermostat 29 and the heater 23 inside the lower air duct 215, the thermostat 29 can monitor the temperature inside the lower air duct 215 in real time. In the event of sudden stalling or damage to the fan 22, the thermostat 29 can detect the abnormal temperature in time and control the cleaning equipment to stop working, which can effectively reduce risks and improve the safety of the cleaning equipment.

[0238] The thermostat mounting position 21586 within the downdraft duct 215 has at least two of the following structures:

[0239] Firstly, the expansion section 2154 is provided with a thermostat mounting position 21586 for mounting the thermostat 29.

[0240] The thermostat mounting position 21586 can be set on any side wall 13 of the expansion section 2154, for example, it can be set on the front side wall 13 or the rear side wall 13 of the expansion section 2154.

[0241] In this embodiment, by setting the temperature controller mounting position 21586 between the inlet end of the downdraft duct 215 and the heater mounting position 21585, the temperature controller 29 can detect the temperature of the gas that has not been heated by the heater 23, and promptly control the cleaning equipment to stop working when the temperature is abnormal, thereby further reducing risks and improving the safety of the cleaning equipment.

[0242] In some embodiments, the front sidewall 13 of the expansion section 2154 is provided with a thermostat mounting position 21586 for mounting the thermostat 29.

[0243] In this embodiment, if the fan 22 suddenly stalls or is damaged, the hot air from the heater 23 rises and quickly reaches the inclined position of the front side wall 13 of the expansion section 2154. At this time, the temperature at that position reaches its maximum. This thermostat installation position 21586 can effectively reduce safety issues.

[0244] Secondly, as shown in Figure 21, the downdraft duct 215 is provided with a thermostat mounting position 21586 for installing a thermostat 29. The thermostat mounting position 21586 and the heater mounting position 21585 are arranged side by side in the horizontal direction.

[0245] In this embodiment, the temperature controller mounting position 21586 and the heater mounting position 21585 are arranged side by side in the horizontal direction. The temperature controller 29 can directly detect the temperature of the heater 23 and promptly control the cleaning equipment to stop working when the temperature of the heater 23 is abnormal, thereby further reducing risks and improving the safety of the cleaning equipment.

[0246] In some embodiments, as shown in FIG21, the downdraft duct 215 further includes: an isolation plate 2155; the isolation plate 2155 is installed on the inner side of the thermostat mounting position 21586 to isolate the airflow passage between the thermostat 29 and the downdraft duct 215, and the isolation plate 2155 is made of a thermally conductive and insulating material.

[0247] The isolation plate 2155 can be made of thermally conductive and insulating materials such as ceramic, graphene, mica, or silicone. The isolation plate 2155 can be connected to the inner side of the thermostat mounting position 21586 via plug-in connection, threaded connection, or snap-fit ​​connection.

[0248] In this embodiment, by setting a thermally conductive and insulating isolation plate 2155, on the one hand, the thermostat 29, which needs to be connected to a high voltage, can be isolated from the airflow channel of the downdraft duct 215, thereby preventing the thermostat 29 from coming into contact with the conductive water vapor of the downdraft duct 215, strengthening insulation protection, and reducing safety hazards; on the other hand, the isolation plate 2155 also has a thermally conductive function, which can reflect the temperature at the heater 23 to the thermostat 29 in real time, so that the entire system can be cut off when the thermostat 29 detects an abnormal temperature, thereby improving the safety of the cleaning equipment.

[0249] It is understandable that since the downdraft duct 215 and the clean chamber 11 are both in a closed space, the space is filled with a large amount of conductive water vapor, and the thermostat 29 needs to be connected to a strong power source, there is a safety hazard if the thermostat 29 comes into direct contact with the water vapor.

[0250] As shown in Figures 22 and 23, the cleaning equipment in this embodiment of the application further includes an air duct 21, which includes a fan mounting position 2146, a first air guide section 2147, and a second air guide section 2149 connected in sequence. The fan mounting position 2146 and the first air guide section 2147 are distributed in the same direction, and the first air guide section 2147 and the second air guide section 2149 are relatively bent. The first air guide section 2147 is provided with a volute tongue 2148, and the flow area at the volute tongue 2148 gradually increases from the end near the fan mounting position 2146 to the end near the second air guide section 2149.

[0251] The fan mounting position 2146 is used to install the fan 22. The fan mounting position 2146 and the first air guide section 2147 are located on the same side of the cleaning chamber 11. For example, the fan mounting position 2146 and the first air guide section 2147 can both be located on the top surface of the cleaning chamber 11 or both can be located on the side surface of the cleaning chamber 11.

[0252] The first air guide section 2147 and the second air guide section 2149 are bent relative to each other. The first air guide section 2147 and the second air guide section 2149 are located on adjacent surfaces of the cleaning chamber 11. For example, the first air guide section 2147 is located on the top surface of the cleaning chamber 11 and the second air guide section 2149 is located on the side surface of the cleaning chamber 11; or, the first air guide section 2147 is located on the side surface of the cleaning chamber 11 and the second air guide section 2149 is located on the bottom surface of the cleaning chamber 11.

[0253] The relative bending angle between the first air guide section 2147 and the second air guide section 2149 can be 90°, 180° or other angles, which can be set according to the installation environment of the air duct 21.

[0254] The volute tongue 2148 is located on the side of the first guide section 2147 near the fan mounting position 2146. The volute tongue 2148 is used to reduce the amount of gas circulating within the fan mounting position 2146. When the impeller 222 of the fan 22 rotates, the airflow entering the inlet 211 passes near the volute tongue 2148, where the tongue of the volute tongue 2148 splits it in two: most of the airflow flows into the first guide section 2147 along the fan mounting position 2146; a small portion of the airflow flows back to the fan mounting position 2146 through the gap between the volute tongue 2148 and the impeller 222, and after rotating once with the impeller 222 within the fan mounting position 2146, it returns to the volute tongue 2148 to participate in a new split.

[0255] It should be noted that after the gas in the cleaning chamber 11 is drawn into the first guide section 2147 by the fan 22, it immediately enters the second guide section 2149. When the gas in the cleaning chamber 11 moves from the first guide section 2147 to the second guide section 2149, its direction is deflected. The deflection angle is the same as the angle of relative bending of the first guide section 2147 and the second guide section 2149. The deflection of the gas creates resistance to the gas flow and easily causes backflow vortex phenomenon, which affects the overall working status, air volume and efficiency of the fan 22.

[0256] The air duct 21 provided in this embodiment of the application has a volute tongue 2148 in the first air guide section 2147, and the flow area at the volute tongue 2148 gradually increases from the end near the fan mounting position 2146 to the end near the second air guide section 2149. This can reduce the backflow vortex effect caused by the deflection of the airflow direction when it moves from the first air guide section 2147 to the second air guide section 2149. In addition, the expansion design of the first air guide section 2147 can significantly improve the uniformity of the air velocity at the outlet of the fan 22 and the maximum static pressure of the fan 22, thereby increasing the overall air volume in the air duct 21 and making the air velocity at the surface of the heater 23 uniform, thereby improving the hot air drying effect of the cleaning equipment.

[0257] In some embodiments, the fan mounting position 2146 and the first air guide section 2147 are distributed horizontally, and the second air guide section 2149 is distributed vertically.

[0258] The first air guide section 2147 and the second air guide section 2149 are bent at a relative angle of 90° to accommodate cleaning equipment where the mounting plane of the fan 22 and the internal circulation outlet of the cleaning chamber 11 are located on different surfaces.

[0259] In some embodiments, the volute tongue 2148 includes an arc-shaped segment 21481 and a straight segment 21482. The arc-shaped segment 21481 protrudes toward the middle of the first air guide segment 2147. The first end of the straight segment 21482 is connected to the arc-shaped segment 21481 and to the wall of the first air guide segment 2147.

[0260] The arc-shaped section 21481 is mainly used to guide the flow direction of the gas, allowing it to better enter the area of ​​the straight section 21482, while reducing turbulence and eddies. The straight section 21482 is mainly used to smoothly introduce the airflow from the arc-shaped section 21481 into the second guide section 2149.

[0261] In some embodiments, as shown in FIG23, the angle between the straight line segment 21482 and the central axis of the first air guide segment 2147 is θ, which satisfies: 5°≤θ≤60°.

[0262] The angle θ between the straight section 21482 and the central axis of the first air guide section 2147 can be 5°, 25°, 45° or 60°, and can be set according to the actual working environment.

[0263] In some embodiments, the straight segment 21482 is tangent to the arc segment 21481 so that the airflow of the arc segment 21481 can be smoothly introduced into the straight segment 21482.

[0264] In some embodiments, as shown in FIG23, the arc of the arc segment 21481 is δ, which satisfies: 30°≤δ≤90°.

[0265] The arc δ of the arc segment 21481 can be 30°, 45°, 60° or 90°, and can be set according to the actual working environment.

[0266] By setting the arc δ of the arc segment 21481, the gas can enter the region of the straight segment 21482 better, while reducing the turbulence and eddies of the airflow.

[0267] In some embodiments, as shown in FIG23, the vertical distance d4 from the center of the fan mounting position 2146 to the straight line segment 21482 and the radius r of the fan mounting position 2146 satisfy: d4≤3r.

[0268] The vertical distance d4 from the center of the fan mounting position 2146 to the straight line segment 21482 can be negative, meaning the extension of the straight line segment 21482 intersects the fan mounting position 2146; or, the extension of the straight line segment 21482 is tangent to the fan mounting position 2146, meaning the vertical distance d4 from the center of the fan mounting position 2146 to the straight line segment 21482 is 0; or, the vertical distance d4 from the center of the fan mounting position 2146 to the straight line segment 21482 can be r, 1.5r, or 3r, which can be set according to the actual working environment.

[0269] In this embodiment, by setting the vertical distance from the center of the fan mounting position 2146 to the straight section 21482, the gas can enter the straight section 21482 area better, while reducing the turbulence and eddies of the airflow.

[0270] In some embodiments, the volute tongue 2148 is spaced apart from the second guide section 2149 to improve gas flow characteristics, increase flow diversion efficiency, and reduce airflow turbulence and eddies. The distance between the volute tongue 2148 and the second guide section 2149 needs to be calculated and adjusted according to actual requirements.

[0271] In some embodiments, as shown in FIG23, the air duct 21 is opened at the fan mounting position 2146 to form the lower volute of the fan 22.

[0272] In this embodiment, the fan mounting position 2146 is open to facilitate the installation of the impeller 222 of the fan 22.

[0273] The fan 22 can retain only the upper shell 221, impeller 222 and motor assembly, omitting the original lower shell of the fan 22. In this way, the fan 22 is composed of the fan mounting position 2146 and the upper shell 221 of the fan 22, which reduces the overall size of the fan 22. A larger model of fan 22 can be installed in the same space. Furthermore, the fan mounting position 2146 replaces the lower shell of the fan 22, and the impeller 222 is directly installed in the fan mounting position 2146, which increases the air intake area of ​​the air inlet 211 and increases the air intake volume.

[0274] In some embodiments, as shown in Figures 24 and 25, the cleaning device provided in this application embodiment further includes a water-blocking structure. The first wall of the inner tank 1 of the cleaning device is provided with an installation hole. The water-blocking structure includes an air duct 21 and a water-blocking cover 24.

[0275] As shown in Figures 25 and 26, the air inlet end 20 of the air duct 21 has a flange 201, which is adapted to extend into the inner liner 1 through the mounting hole; the water baffle 24 includes a connected water baffle 241 and a mounting structure 242, which is connected to the flange 201. The projection of the water baffle 241 on the first wall surface covers the projection of the air inlet end 20 on the first wall surface, and an air inlet 211 is formed between the water baffle 24 and the flange 201.

[0276] The first wall surface of the inner tank 1 of the cleaning equipment can be the top wall 12, side wall 13, or bottom wall 16 of the inner tank 1, which can be set according to the installation scenario of the cleaning equipment. The mounting hole can be a through hole, which is used to install the air duct 21.

[0277] The air inlet end 20 of the air duct 21 has a flange 201, which is connected to the mounting hole. The flange 201 and the mounting hole can be connected by means of snap-fit ​​connection, knob connection or threaded connection.

[0278] The water baffle 24 has ventilation and water baffle functions. The water baffle 24 can be set between the fan 22 and the cleaning chamber 11, and the water baffle 24 is located inside the cleaning chamber 11.

[0279] An air inlet 211 is formed between the water baffle 24 and the flange 201. The fan 22 draws the gas in the cleaning chamber 11 into the air duct 21 through the air inlet 211. The number of air inlets 211 can be set to one or more, and the shape of the air inlet 211 can be strip-shaped or surface-shaped, which can be set according to the actual installation situation.

[0280] The mounting structure 242 and the flange 201 can be connected by means of snap-fit, knob, or threaded connection. The baffle 241 is connected to the flange 201 of the air inlet end 20 of the air duct 21 through the mounting structure 242. The baffle 241 and the mounting structure 242 can be connected by means of integral molding, welding, or threaded connection.

[0281] When the mounting structure 242 and the flange 201 are connected by threads, both the mounting structure 242 and the flange 201 are provided with engaging threads, and the mounting structure 242 and the flange 201 are connected by thread engagement.

[0282] When the mounting structure 242 and the flange 201 are connected by a knob, the mounting structure 242 and the flange 201 can be provided with an interlocking structure. After the mounting structure 242 and the flange 201 are rotated at a certain angle, the mounting structure 242 and the flange 201 are fastened together.

[0283] According to the water-blocking structure provided in the embodiments of this application, by setting up the air duct 21 and the water-blocking cover 24, and the projection of the water-blocking plate 241 on the first wall surface covering the projection of the air inlet end 20 on the first wall surface, the direct impact of water flow into the air duct 21 during the cleaning process can be reduced, thus reducing the situation where water flow directly impacts the inside of the fan 22 and causes contamination of the impeller 222. This provides protection and also increases the air volume of the fan 22, which is beneficial for using a higher power heater 23 downstream of the fan 22 to accelerate the drying process.

[0284] In some embodiments, as shown in FIG26, there are multiple mounting structures 242, which are arranged circumferentially around the baffle plate 241, and an air inlet 211 is formed between two adjacent mounting structures 242.

[0285] The installation structure 242 can be set in two, three or more. Multiple installation structures 242 can be evenly distributed around the circumference of the water baffle 241, or they can be set at different angles according to requirements. The number and distribution of installation structures 242 can be set according to the actual use scenario.

[0286] By adding multiple mounting structures 242, the water baffle 24 can be connected to the air inlet end 20 of the air duct 21 at multiple points, thereby improving the reliability of the connection.

[0287] In some embodiments, the flanges 201 include a plurality of flanges spaced apart circumferentially along the air inlet end 20. The plurality of flanges 201 can be connected to a plurality of mounting structures 242 first, and then the plurality of flanges 201 and the plurality of mounting structures 242 can be rotated by a certain angle so that the plurality of flanges 201 and the plurality of mounting structures 242 are connected in a one-to-one correspondence.

[0288] In this embodiment, the number and installation position of the flanges 201 are matched with the installation structure 242. By setting multiple flanges 201 and connecting them one-to-one with multiple installation structures 242, the connection points between the water baffle 24 and the air inlet end 20 of the air duct 21 can be increased, thereby improving the reliability of the connection.

[0289] In some embodiments, as shown in FIG26, multiple flanges 201 and multiple mounting structures 242 are assembled or disassembled by means of knobs, and the connection method is simple and convenient.

[0290] Multiple flanges 201 are spaced apart circumferentially along the air inlet end 20, and multiple mounting structures 242 are spaced apart circumferentially around the baffle plate 241. Before connecting the baffle cover 24 to the air inlet end 20 of the air duct 21, each mounting structure 242 can be positioned between two adjacent flanges 201. Then, the baffle cover 24 is rotated at a certain angle relative to the air inlet end 20 of the air duct 21 so that the projections of the flanges 201 and the air inlet end 20 on the axial direction of the air duct 21 overlap. At this time, the baffle cover 24 is fastened and connected to the air inlet end 20 of the air duct 21.

[0291] In some embodiments, the mounting structure 242 includes a slot 2421 that opens radially inward, and a flange 201 is embedded in the slot 2421. The area of ​​the flange 201 located in the slot 2421 can be adjusted by rotating the water baffle 24, so as to facilitate assembly or disassembly.

[0292] In this embodiment, when there is only one flange 201, the flange 201 extends circumferentially along the air inlet end 20 and has a notch. The mounting structure 242 embeds the flange 201 into the slot 2421 through the notch. When there are multiple flanges 201, the multiple flanges 201 are spaced apart circumferentially along the air inlet end 20. The mounting structure 242 embeds each flange 201 into one or more slots 2421 at the interval between two adjacent flanges 201.

[0293] In some embodiments, as shown in FIG26, the mounting structure 242 includes: a connector 2422 and a snap-fit ​​connector 2423; the connector 2422 is connected to the baffle plate 241; the snap-fit ​​connector 2423 is connected to the connector 2422, and the snap-fit ​​connector 2423 is provided with a snap-fit ​​groove 2421.

[0294] The card connector 2423, the connector 2422, and the baffle plate 241 can be connected by integral molding, welding, or gluing.

[0295] The connector 2422 can be connected to the edge, center, or area between the edge and center of the baffle 241.

[0296] In some embodiments, as shown in FIG26, the snap-fit ​​connector 2423 is located on the radial outer side of the baffle plate 241, and the radial outer wall of the snap-fit ​​connector 2423 is arc-shaped.

[0297] As shown in Figure 27, the snap connector 2423 is located on the radial outer side of the baffle plate 241, that is, there is a certain gap between the outer side of the snap connector 2423 and the radial outer side of the baffle plate 241. When the snap connector 2423 is connected to the flange 201, an air inlet 211 is formed between the baffle plate 241 and the flange 201.

[0298] The radial outer wall of the snap connector 2423 is made into an arc shape so that the radial outer wall of the snap connector 2423 can match the inner wall 13 of the air inlet end 20 of the air duct 21.

[0299] In some embodiments, the connector 2422 has a hollowed-out groove 24221. One or more hollowed-out grooves 24221 may be provided, and the number and hollowed-out area of ​​the hollowed-out grooves 24221 may be set according to the area of ​​the connector 2422.

[0300] By setting the hollow groove 24221, the weight of the connector 2422 can be reduced, thereby reducing material costs.

[0301] In some embodiments, the radially inner ends of the connectors 2422 of the plurality of mounting structures 242 are connected by annular ribs 2411 connected to the bottom surface of the baffle plate 241.

[0302] The bottom surface of the baffle plate 241 is provided with annular ribs 2411. The annular ribs 2411 can be arranged concentrically with the baffle plate 241 or eccentrically with the baffle plate 241. The annular ribs 2411 can be connected to the bottom surface of the baffle plate 241 by integral molding, welding or adhesive bonding. The radial inner ends of the connectors 2422 of the multiple mounting structures 242 can be connected to the annular ribs 2411 by integral molding, welding or adhesive bonding.

[0303] In this embodiment, as shown in FIG26, the radial inner ends of the connectors 2422 of the multiple mounting structures 242 are connected to the annular ribs 2411, which can connect the connectors 2422 of the multiple mounting structures 242 together and improve the stability of the connection between the multiple mounting structures 242 and the baffle plate 241.

[0304] In some embodiments, as shown in FIG25, the first wall surface is provided with a mounting boss 121 that surrounds the mounting hole and protrudes into the cleaning chamber 11. The water-blocking structure further includes a sealing ring, which is clamped between the mounting boss 121 and the air duct 21.

[0305] An installation space is formed between the mounting boss 121 and the air inlet end 20 of the air duct 21. The sealing ring is located in the installation space, and the sealing between the mounting boss 121 and the air duct 21 can be achieved by squeezing the sealing ring.

[0306] The sealing ring can be made of rubber, plastic or other elastic materials, which can increase the seal between the air inlet end 20 of the air duct 21 and the inner liner 1, reduce water vapor leakage in the cleaning chamber 11, and improve the safety and reliability of the cleaning equipment.

[0307] In some embodiments, as shown in FIG25, the distance between the end face of the mounting boss 121 and the surface of the water baffle 24 is Δh4, which satisfies: Δh4≥5mm.

[0308] The distance Δh4 between the end face of the mounting boss 121 and the surface of the baffle cover 24 can be 5mm, 6mm, 8mm or larger. By setting the distance between the end face of the mounting boss 121 and the surface of the baffle cover 24, the air intake of the air duct 21 can be increased, the power wall of the heater 23 can be reduced, and safety hazards can be reduced.

[0309] In some embodiments, as shown in Figures 28 and 30, the water-blocking cover 24 includes: a main cover body 243 and a plurality of water-blocking members 244 groups; the main cover body 243 has a mounting structure 242 for mounting on the whole machine and forms a vent 2432; the plurality of water-blocking members 244 groups are spaced apart along the axial direction of the vent 2432, each water-blocking member 244 group includes a plurality of water-blocking members 244 spaced apart along a direction intersecting the axial direction of the vent 2432, and the projection of the plurality of water-blocking members 244 groups along the axial direction of the vent 2432 covers the axial projection of the inlet end of the vent 2432.

[0310] The main cover 243 is used to connect with the whole machine and multiple water baffles 244. The main cover 243 forms a ventilation channel 2432 to realize the circulation of air in the cleaning chamber 11.

[0311] The main cover 243 can be connected to the whole machine by means of snap-fit, threaded connection or welding. The main cover 243 and multiple water baffles 244 can be connected by means of integral molding, welding or gluing.

[0312] The machine has structural components that connect to the mounting structure 242. When the main cover 243 is connected to the machine via a snap-fit ​​connection, one of the mounting structure 242 and the structural component is a fixing buckle, and the other is a connector 2422. The connector 2422 is inserted into the fixing buckle to lock the main cover 243 to the machine. Alternatively, when the main cover 243 is connected to the machine via a threaded connection, the mounting structure 242 and the structural component have interlocking threads. The mounting structure 242 and the structural component lock the main cover 243 to the machine through threaded engagement.

[0313] As shown in Figure 30, the water-blocking component 244 group is provided with multiple layers. The multi-layer water-blocking component 244 group is spaced apart along the axial direction of the ventilation channel 2432. The water-blocking component 244 group can be provided with 2, 3 or more layers. The specific number can be set according to the axial length of the ventilation channel 2432. The adjacent two layers of water-blocking component 244 group are spaced apart to achieve ventilation. The setting of the multi-layer water-blocking component 244 group can enhance the water-blocking effect.

[0314] Multiple water-blocking components 244 are spaced apart along a direction that intersects the axial direction of the ventilator 2432. There can be 3, 4 or more water-blocking components 244. The number of water-blocking components 244 in each layer of water-blocking components 244 can be the same or different. The number of water-blocking components 244 in each layer of water-blocking components 244 can be determined according to the cross-sectional area of ​​the ventilator 2432 in the plane.

[0315] As shown in Figure 30, the arrows in the figure indicate the airflow direction. Adjacent water-blocking components 244 are spaced apart to allow ventilation. The projection of multiple water-blocking components 244 along the axial direction of the ventilation channel 2432 covers the projection of the inlet end of the ventilation channel 2432 along the axial direction, so that the airflow is drawn into the air duct 21 by the fan 22 in a zigzag shape along the interval between adjacent water-blocking components 244 and the interval between adjacent water-blocking components 244, effectively blocking the entry of water flow while ensuring the flow of gas.

[0316] The multiple water-blocking members 244 can be spaced apart in a direction perpendicular to the axial direction of the cross-section of the ventilator 2432, and the length of the multiple water-blocking members 244 gradually changes radially along the cross-section of the ventilator 2432 so that the ends of the multiple water-blocking members 244 are connected to the inner wall of the ventilator 2432; or, the multiple water-blocking members 244 can be spaced apart in a direction inclined at an acute angle to the axial direction of the ventilator 2432.

[0317] As shown in Figure 29, the sum of the projections of multiple water-blocking components 244 groups along the axial direction of the ventilator 2432 is equal to or greater than the projection of the inlet end of the ventilator 2432 along the axial direction, so as to achieve full coverage of the ventilator 2432 by multiple water-blocking components 244 groups.

[0318] Among them, the water-blocking component 244 can be a water-blocking rib, a water-blocking membrane, or a water-blocking plate 241, etc.

[0319] According to the water baffle 24 provided in the embodiment of this application, multiple groups of water baffles 244 are arranged axially spaced along the ventilation channel 2432. Each group of water baffles 244 includes multiple water baffles 244 spaced apart along a direction intersecting the axial direction of the ventilation channel 2432. The projection of the multiple groups of water baffles 244 along the axial direction of the ventilation channel 2432 covers the projection of the inlet end of the ventilation channel 2432 along the axial direction. This allows the airflow to be drawn into the air duct 21 by the fan 22 in a zigzag shape along the interval between two adjacent groups of water baffles 244 and the interval between two adjacent water baffles 244. This can reduce the direct impact of water flow into the air duct 21 during the cleaning process, which could cause contamination of the impeller 222. This provides protection and also increases the air volume of the fan 22, which is beneficial for using a higher power heater 23 downstream of the fan 22 to accelerate the drying process.

[0320] Among them, multiple water-blocking components 244 can be distributed parallel to each other along the plane, or they can be distributed intersecting each other.

[0321] In some embodiments, the water-blocking members 244 in the plurality of water-blocking member groups 244 are arranged in parallel and spaced apart to uniformly distribute the airflow velocity and volume.

[0322] In some embodiments, the spacing between two adjacent water deflectors 244 in a plurality of groups of water deflectors 244 is equal to further uniform the flow rate and volume of the airflow.

[0323] In some embodiments, as shown in FIG30, the water baffle 244 has a guide surface 2443 on the side away from the inlet end of the vent 2432, and the guide surface 2443 is inclined to the outside of the water baffle 244 in the direction close to the inlet end of the vent 2432.

[0324] The guide surface 2443 can be a plane or an arc-shaped surface.

[0325] By setting the guide surface 2443, the water vapor in the cleaning chamber 11 can flow back into the cleaning chamber 11 when it encounters the condensate generated by the fan 22, thereby reducing the time that the condensate stays in the water baffle 244 and increasing the drying effect inside the chamber.

[0326] In some embodiments, as shown in FIG30, the water-blocking member 244 includes a first plate 2441 and a second plate 2442. The side of the first plate 2441 facing away from the inlet end of the vent 2432 is connected to the side of the second plate 2442 facing away from the inlet end of the vent 2432. The normals of the first plate 2441 and the second plate 2442 are both at acute angles to the axial direction of the vent 2432. The surface of the first plate 2441 facing away from the inlet end of the vent 2432 and the surface of the second plate 2442 facing away from the inlet end of the vent 2432 form a guide surface 2443.

[0327] The first plate 2441 and the second plate 2442 can be arranged symmetrically or asymmetrically along their connection point, depending on the actual application scenario. In the case of an asymmetrical arrangement of the first plate 2441 and the second plate 2442, their lengths and widths can be different.

[0328] The first plate 2441 and the second plate 2442 are connected on the side away from the inlet end of the vent 2432, and the first plate 2441 and the second plate 2442 are spaced apart on the side near the inlet end of the vent 2432. The first plate 2441 and the second plate 2442 form a bracket-shaped interception structure, which can increase the resistance to water flow, reduce the inflow of water, and at the same time will not generate a large resistance to airflow.

[0329] By setting the water baffle 244 as a double-sided guide surface 2443, the condensate generated by the fan 22 can flow back into the cleaning chamber 11 along the guide surface 2443, reducing the time the condensate stays in the water baffle 244 and increasing the drying effect in the chamber. At the same time, it can also intercept the water vapor that enters the air duct 21 with the water vapor flow, reducing the amount of water entering the air duct 21 and protecting the electrical components such as the fan 22 and heater 23 in the air duct 21.

[0330] In some embodiments, as shown in FIG30, the main cover 243 includes: a tube 2431 and a flange 2433; the tube 2431 forms a vent 2432; the flange 2433 is connected to the outer periphery of the tube 2431 and is arranged around the tube 2431, and an installation structure 242 is provided on the side of the tube 2431 located away from the inlet end of the flange 2433 and opposite to the inlet end of the vent 2432.

[0331] Among them, the pipe body 2431 has a certain axial length, which can increase the number of water-blocking components 244 sets and improve the water-blocking effect.

[0332] The flange 2433 can be annular, and it surrounds the pipe body 2431. The inner side of the flange 2433 is connected to the outer periphery of the pipe body 2431, and the outer side of the flange 2433 extends in a direction away from the pipe body 2431. The width of the flange 2433 is set according to the actual installation environment of the water baffle 24.

[0333] The flange 2433 setting can increase the overlap area when the water baffle 24 is connected to the whole machine, thereby increasing the sealing effect.

[0334] In some embodiments, as shown in FIG28, there are multiple mounting structures 242, which are arranged at intervals around the tube body 2431, and the multiple mounting structures 242 are assembled or disassembled with the whole machine by means of knobs.

[0335] The installation structure 242 can be set in two, three or more. Multiple installation structures 242 can be evenly distributed around the circumference of the pipe body 2431, or they can be set at different angles according to requirements. The number and distribution of installation structures 242 can be set according to the actual use scenario.

[0336] By adding multiple mounting structures 242, the main cover 243 can be connected to the whole machine at multiple points, thereby improving the reliability of the connection.

[0337] Before connecting the mounting structure 242 to the whole machine, each of the multiple mounting structures 242 can be positioned between the corresponding notches of the whole machine and the mounting structure 242. Then, the main cover 243 is rotated at a certain angle relative to the air inlet end 20 of the whole machine so that the connecting part 2422 of the whole machine and the mounting structure 242 have overlapping parts in the axial projection of the air passage 2432. At this time, the mounting structure 242 and the whole machine are fastened together.

[0338] In some embodiments, as shown in FIG28, the pipe body 2431 is provided with a water guide 2434, which is flush with the side of the flange 2433 facing away from the inlet end of the vent 2432.

[0339] The water inlet 2434 connects the ventilation channel 2432 and the air duct 21. The condensate generated by the water vapor in the airflow encountering the flange 2433 or the pipe body 2431 can flow from the water inlet 2434 into the ventilation channel 2432 and then back into the cleaning chamber 11, reducing the time that the condensate stays in the water baffle 244 and increasing the drying effect inside the chamber.

[0340] In some embodiments, as shown in FIG30, the side of the flange 2433 facing away from the inlet end of the vent 2432 is inclined downward toward the radially inner end, so that condensate can flow into the water guide 2434 along the inclined side of the flange 2433, thereby further reducing the time that condensate stays in the water baffle 244 and increasing the drying effect inside the cavity.

[0341] In some embodiments, as shown in FIG28, the flange 2433 has a sealing mounting position 24331 for installing a seal on the side opposite to the inlet end of the vent 2432.

[0342] The sealing mounting position 24331 is used to install a sealing element, which can be a sealing strip, sealing ring, or sealing gasket, etc.

[0343] The sealing mounting position 24331 can be a groove, a protrusion, or a flat structure. The seal is installed in the sealing mounting position 24331. By squeezing the seal, the flange 2433 and the whole machine can be sealed. The structure of the sealing mounting position 24331 is determined according to the type of seal.

[0344] In some embodiments, as shown in FIG28, the flange 2433 is provided on the side opposite to the inlet end of the vent 2432 with a plurality of pairs of protrusions 24332 circumferentially spaced around the tube body 2431. Each pair of protrusions 24332 includes two protrusions 24332 arranged radially spaced apart, and the plurality of pairs of protrusions 24332 form a sealing mounting position 24331.

[0345] In this configuration, a groove is formed between two protrusions 24332, and at least a portion of the seal is held between the two protrusions 24332.

[0346] By setting multiple pairs of protrusions 24332, which are circumferentially spaced around the tube body 2431, the sealing element can be fixed at multiple points, which restricts the position and deformation of the seal and improves the sealing performance.

[0347] In some embodiments, as shown in FIG31, a reinforcing rib 24333 is provided between the side of the flange 2433 near the inlet end of the vent 2432 and the outer side wall of the tube 2431.

[0348] The reinforcing rib 24333 can be connected to the flange 2433 and the outer wall of the tube body 2431 by means of integral molding, welding or adhesive bonding. The reinforcing rib 24333 can be straight, curved or other specific shapes, depending on the required reinforcement effect and structural form.

[0349] By setting reinforcing ribs 24333, stress and pressure from the external environment can be effectively distributed and borne, preventing deformation, cracking or loosening at the connection between flange 2433 and tube body 2431, and improving the connection strength and stability between flange 2433 and tube body 2431.

[0350] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0351] In the description of this application, it should be understood that 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., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0352] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0353] In the description of this application, "multiple" means two or more.

[0354] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0355] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0356] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0357] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A cleaning apparatus, characterized by, include: Inner liner, which forms a clean chamber; An exhaust assembly, installed in the inner liner, is configured to exhaust gas from the clean chamber when open; An air duct is installed in the inner liner and has an air inlet and an air outlet, both of which are connected to the cleaning chamber. A fan configured to drive gas within the duct when activated; A heater configured to heat gas flowing through the duct when turned on.

2. The cleaning apparatus of claim 1, wherein, When the exhaust assembly is in operation, the exhaust volume of the exhaust assembly is not less than the amount of gas entering the cleaning chamber from the outside.

3. The cleaning apparatus according to claim 1 or 2, characterized in that, The air duct includes a makeup air branch, the makeup air inlet of which is connected to the outside, and the makeup air outlet of which is connected to the clean chamber. When the exhaust assembly and the fan are working, the exhaust volume of the exhaust assembly is not less than the makeup air volume of the makeup air branch.

4. The cleaning equipment according to any one of claims 1-3, characterized in that, The air inlet is located on the top wall of the cleaning chamber, and the air outlet is located on the lower side of the cleaning chamber.

5. The cleaning equipment according to any one of claims 1-4, characterized in that, The fan is installed above the top wall of the inner liner, and at least a portion of the air duct is located above the top wall and outside the side wall of the inner liner.

6. The cleaning equipment according to any one of claims 1-5, characterized in that, Also includes: The side plate, wherein the heater is installed in the region of the air duct located on the side wall of the inner liner, the side plate is installed on the side wall of the inner liner and covers at least a portion of the air duct.

7. The cleaning equipment according to claim 6, characterized in that, The inner surface of the side plate is spaced apart from the air duct, and the distance between them is c, which satisfies c≥2mm.

8. The cleaning equipment according to any one of claims 1-7, characterized in that, The power of the heater is P, which satisfies: P≤500W.

9. The cleaning equipment according to any one of claims 1-8, characterized in that, The fan includes an upper casing, an impeller, and a motor assembly. The motor assembly is dynamically coupled to the impeller. The upper casing is connected to the air duct to form a receiving cavity, and the impeller is installed in the receiving cavity.

10. The cleaning equipment according to any one of claims 1-9, characterized in that, The cleaning equipment has an internal circulation drying working mode. In the internal circulation drying working mode, the fan and the heater are working, and the exhaust assembly is stopped. And / or, the cleaning equipment has a dehumidification negative pressure working mode, in which the fan and the heater are stopped, and the exhaust assembly is working; And / or, the cleaning equipment has a hybrid operating mode in which the fan, the heater, and the exhaust assembly all operate; And / or, the cleaning equipment has a mixed dehumidification operating mode; in the mixed dehumidification operating mode, both the fan and the exhaust assembly are operating, and the heater is off.

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