Air duct structure of a dishwasher

Abstract

The present invention discloses an air duct structure of a dishwasher, which includes an air inlet channel, an air guiding channel, and an air outlet channel that are connected in sequence and communicate with the accommodation chamber of the dishwasher; the air inlet channel is provided with a fan unit; at least part of the air guiding channel is attached to the outer wall of the accommodation chamber; the air outlet channel communicates with the accommodation chamber and at least part of it is attached to the top wall of the accommodation chamber; wherein, a flow guiding structure is arranged in the air outlet channel; the air flow entering the air outlet channel forms a uniformly flowing air flow under the action of the flow guiding structure and then enters the accommodation chamber. The present invention provides an air duct structure of a dishwasher, which is arranged to fit the accommodation chamber of the dishwasher, enabling the air flow to quickly pass through the air duct and enter the accommodation chamber with small air volume loss. At the same time, after passing through the air duct structure, the disorderly flowing air flow becomes a uniformly flowing air flow; in addition, by adopting a cross-flow fan, the air volume is increased, the noise is reduced, and the user experience is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of household appliances, and in particular relates to an air duct structure of a dishwasher. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for the quality of life, and thus the requirements for product quality, performance, humanization of use, intelligent operation and other aspects are also getting higher and higher. As an excellent product, dishwashers have gradually entered people's lives. Dishwashers are equipment that automatically wash bowls, chopsticks, plates, dishes, knives, forks and other tableware, which greatly facilitates people's lives. After washing the tableware, the dishwasher usually needs to dry the tableware. Among the existing dishwashers, some are not connected to the external drying system, relying on the heat of the tableware itself to evaporate the water droplets on the tableware to achieve the drying of the tableware, but the drying effect is poor; other dishwashers rely on external drying systems to accelerate the flow of air in the dishwasher, take away water vapor, and accelerate the drying of the tableware. However, the external drying system relies on centrifugal fans to fill dry air into the dishwasher or extract water vapor from the dishwasher (which will corrode the air machine for a long time) to achieve the flow of air in the dishwasher. However, the flow direction and flow basin of the airflow entering the dishwasher are unstable, and the air volume driven by the centrifugal fan usually used is limited. To increase the air volume, the fan speed must be increased, but this will cause a lot of noise, which seriously affects the user experience.

[0003] Chinese patent application number CN201720747062.8 discloses an exhaust system and a dishwasher including the same. The exhaust system includes a fan assembly, an air duct and an air outlet structure, the outlet of the fan assembly is connected to the air inlet connection portion of the air duct, the air outlet structure is slidably connected to the air duct, and the air outlet structure can be at least partially connected to the air outlet of the air duct.

[0004] A Chinese patent with application number CN201620180046.0 discloses a condensation exhaust duct of a dishwasher, a condensation drying device of the dishwasher and a dishwasher, wherein the condensation exhaust duct of the dishwasher is used to be arranged between the inner door and the outer door of the dishwasher, and includes a duct body, the duct body has a condensation inner cavity, a condensation inlet arranged at the top of the condensation inner cavity and a condensation outlet arranged at the bottom of the condensation inner cavity, the inner wall of the condensation inner cavity includes a plurality of vertical wall surfaces extending vertically downward and a plurality of inclined wall surfaces extending obliquely downward, and the vertical wall surfaces and the inclined wall surfaces are alternately arranged in the vertical direction.

[0005] Although the above-mentioned prior art discloses a technical solution for exhausting dishwashers, there are still problems such as serious loss and low transmission efficiency of the airflow generated by the fan during the process of being transported to the accommodating chamber; at the same time, the drying fan has the disadvantages of small air volume and high noise.

[0006] Therefore, it is necessary to improve the deficiencies and defects of the prior art and provide an air duct structure for a dishwasher. By setting an air duct structure that fits the accommodation chamber of the dishwasher and has a changing air flow area in the air duct, the air flow can quickly enter the accommodation chamber through the air duct with small air volume loss. At the same time, after passing through the air duct structure, the disordered air flow becomes a uniform air flow. After the uniform air flow passes through the different grilles at the air outlet of the air duct, it is evenly dispersed into the accommodation chamber. In addition, by using a cross-flow fan, the air volume is increased, the noise is reduced, and the user experience is improved.

[0007] In view of this, the present invention is specifically proposed. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an air duct structure for a dishwasher that can overcome or at least partially solve the above problems.

[0009] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: an air duct structure for a dishwasher, including

[0010] An air inlet channel, an air guiding channel, and an air outlet channel that are connected in sequence and communicate with the accommodation chamber of the dishwasher;

[0011] The air inlet channel is provided with a fan unit;

[0012] At least part of the air guiding channel is attached to the outer wall of the accommodation chamber;

[0013] The air outlet channel communicates with the accommodation chamber and at least part of it is attached to the top wall of the accommodation chamber;

[0014] Among them,

[0015] A flow guiding structure is provided in the air outlet channel;

[0016] The air flow entering the air outlet channel forms a uniform air flow under the action of the flow guiding structure and then enters the accommodation chamber.

[0017] Among them, at the connection between the air inlet channel and the air guiding channel, and between the air guiding channel and the air outlet channel, an arc-shaped transition structure is provided;

[0018] The arc-shaped transition structure forms a trend to introduce the air flow generated by the fan unit from the air inlet channel into the air guiding channel and the air outlet channel. At the air duct exchange, that is, at the place where the air flow area in the air duct changes, an arc-shaped transition structure is provided, so that the flowing air flow can change its direction under the guidance of the arc-shaped transition structure, avoiding the hard contact between the air flow direction and the inner wall of the air duct. While passing quickly, the loss of air volume is greatly reduced.

[0019] Furthermore, the air guiding channel forms a straight-line air duct structure on the outer wall of the accommodation chamber for washing, which is convenient for air flow to pass through. The straight-line air duct structure facilitates the rapid passage of air flow and avoids the loss of air volume caused by air ducts with excessive arcs or corners.

[0020] In one embodiment, the cross-sectional area of the air flow domain in the air guiding channel is smaller than that in the air inlet channel. The area difference between the two air ducts is conducive to the acceleration of air flow during the flow process. When the air flow enters the air duct with a smaller area domain from the air duct with a larger area domain, it obtains a higher transfer speed and quickly passes through the air duct with a smaller area domain, thereby improving the transfer efficiency of the air flow in the air duct and avoiding the loss of air volume.

[0021] In addition, the air outlet channel includes an air inlet and an air outlet;

[0022] The air inlet is communicated with the air guiding channel;

[0023] The air outlet is communicated with the accommodation chamber;

[0024] In one embodiment, the cross-sectional area of the air flow domain formed by the air outlet channel gradually increases from the air inlet to the air outlet side. The continuous increase in the area domain from the air inlet to the air outlet is conducive to the deceleration of the air flow, facilitating the air guiding plate and the air outlet channel to guide the flowing air, so that the air flow with a disordered domain becomes an air flow with a stable and uniform domain.

[0025] Furthermore, the guiding structure includes a first bottom surface and a second bottom surface provided on the bottom wall of the air outlet channel;

[0026] The air inlet is provided on the first bottom surface;

[0027] The air outlet is provided on the second bottom surface;

[0028] In one embodiment, the first bottom surface and the second bottom surface are smoothly transitionally connected and form a height difference of the guiding structure. The height difference enables the air flow flowing from the air guiding channel to obtain a tendency to flow into the accommodation chamber when flowing through the air outlet channel, improving the efficiency of air flow and avoiding the loss of air flow in the air duct;

[0029] In one embodiment, the distance from the first bottom surface to the top wall of the air outlet channel is smaller than the distance from the second bottom surface to the top wall of the air outlet channel. The height difference enables the flowing air flow to form a downward flowing tendency, enhancing the tendency of the air flow to flow from the top of the accommodation chamber into the accommodation chamber.

[0030] Further, the side wall of the air outlet channel is arc-shaped and cooperates with the guide plate to form a structure for adjusting the flowing air current.

[0031] In one embodiment, at least a part of the arc-shaped side wall of the air outlet channel is in a C-shaped structure. By setting the air duct shape at the top of the accommodation chamber to an arc-shaped structure approximately in the shape of a "C", it is possible to avoid water or steam flowing back from the air duct during the operation of the dishwasher, causing damage or corrosion to the cross-flow fan.

[0032] Meanwhile, the flow guiding structure includes a plurality of guide plates spaced apart on the bottom wall of the air outlet channel. The guide plates guide the disordered air current flowing through into a smooth and uniform air current in the flow area.

[0033] The guide plates guide the air current flowing through the air outlet channel from the air inlet to the air outlet.

[0034] In one embodiment, the guide plates are arc-shaped.

[0035] A trend is formed for the air current to flow from the air inlet to the air outlet.

[0036] In one embodiment, the radian of the guide plates is the same as the radian of the side wall of the air outlet channel. The guide plates with the same radian as the side wall of the air duct enhance the guiding effect on the flowing air current in the air duct, making the air current become a uniformly flowing air current after passing through the guide plates from a disordered air current.

[0037] In one embodiment, at least a part of the guide plates is disposed on the first bottom surface.

[0038] Moreover, the flow guiding structure includes a grille disposed at the air outlet.

[0039] A plurality of grid pieces are spaced apart on the grille.

[0040] In one embodiment, the grid pieces can rotate around an axis, thereby adjusting the air outlet angle of the grid pieces. Different angle adjustments meet the needs of customers for different angle washing. By providing a grille with an adjustable orientation at the air outlet of the air duct, further, during the adjustment process of the grille, it will at least face two different directions, which ensures a uniform flow effect when the air current enters the accommodation chamber through the air duct.

[0041] In one embodiment, at least two of the grid pieces rotate at different angles and directions around the axis.

[0042] The air current in the air outlet channel enters the accommodation chamber at different angles and directions under the guidance of at least two grid pieces with different angles and directions, meeting the requirements for different drying angles formed by different tableware arrangements in the accommodation chamber and avoiding drying dead angles.

[0043] Further, the grille is detachably connected to the air outlet;

[0044] In one embodiment, the grille is provided with at least claws along its circumference;

[0045] The air outlet is provided with a slot corresponding to the claw;

[0046] The claw and the slot cooperate to realize the disassembly of the grille and the air outlet, facilitating the user to clean and maintain the grille.

[0047] Moreover, the fan unit is a cross-flow fan disposed in the air inlet passage. By providing a cross-flow fan in the air inlet passage, a large amount of dry air source is provided. At the same time, the cross-flow fan runs with low noise, reducing the impact on the surrounding environment of the dishwasher and providing a more comfortable environment for the user.

[0048] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art:

[0049] 1. By providing an air duct structure that fits the accommodation chamber of the dishwasher and the air flow area in the air duct changes, the air flow can quickly pass through the air duct and enter the accommodation chamber with small air volume loss;

[0050] 2. By providing a flow guiding structure in the air duct to guide the disordered air flow flowing through the air duct, the air flow area after guiding is stable and uniform. After passing through the grille with different angles at the air outlet of the air duct, it is evenly dispersed into the accommodation chamber;

[0051] 3. At the change of the air duct area, a transition structure is provided, so that while the flowing air flow passes quickly, the loss of air volume is greatly reduced;

[0052] 4. Through the change of the air duct air flow area and the setting of two planes with different heights at the air outlet, multiple superpositions of the effect of accelerating the flowing air flow are formed, ensuring that the air flow is quickly and evenly guided in the air duct and accelerated into the accommodation chamber;

[0053] 5. A grille with adjustable orientation is provided at the air outlet of the air duct. Further, during the adjustment process of the grille, it will at least face two different directions, which ensures the uniform flow direction effect when the air flow passes through the air duct and enters the accommodation chamber;

[0054] 6. By setting the shape of the air duct at the top of the accommodation chamber to an approximately "C"-shaped arc structure, it is avoided that water or steam flows back from the air duct during the operation of the dishwasher, causing damage or corrosion to the cross-flow fan;

[0055] 7. By providing a cross-flow fan in the air inlet passage, a large amount of dry air source is provided. At the same time, the cross-flow fan runs with low noise, reducing the impact on the environment around the dishwasher and providing a more comfortable environment for users.

[0056] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0058] In the accompanying drawings:

[0059] Figure 1 is the first schematic diagram of the overall assembly of the air duct structure of the dishwasher of the present invention;

[0060] Figure 2 is the second schematic diagram of the overall assembly of the air duct structure of the dishwasher of the present invention;

[0061] Figure 3 is the first schematic diagram of the air duct structure of the present invention;

[0062] Figure 4 is the second schematic diagram of the air duct structure of the present invention;

[0063] Figure 5 is the schematic diagram of the fan unit of the present invention;

[0064] Figure 6 is the first schematic diagram of the air outlet passage of the present invention;

[0065] Figure 7 is the second schematic diagram of the air outlet passage of the present invention;

[0066] Figure 8 is the third schematic diagram of the air outlet passage of the present invention;

[0067] Figure 9 is the fourth schematic diagram of the air outlet passage of the present invention;

[0068] Figure 10 is the schematic diagram of the exhaust passage of the present invention;

[0069] Figure 11 is the first schematic diagram of the adjustment component passage of the present invention;

[0070] Figure 12 is the second schematic diagram of the adjustment component passage of the present invention;

[0071] Figure 13 It is a schematic diagram of the steam generation component of the present invention;

[0072] Figure 14 It is a schematic diagram of the process logic of using the steam generation component of the present invention.

[0073] In the figure: 1, accommodation chamber; 2, air inlet channel; 201, fan unit; 202, heating unit; 3, air extraction channel; 301, water storage tank; 4, air outlet channel; 401, air inlet; 402, air outlet; 403, first bottom surface; 404, second bottom surface; 405, guide plate; 406, grille; 407, grid piece; 408, switch part; 409, water retaining rib; 6, transition structure; 8, exhaust channel; 801, adjustment component; 802, first adjustment unit; 803, second adjustment unit; 804, rotating shaft; 9, steam generation component; 901, first connecting pipe; 902, second connecting pipe; 903, third connecting pipe; 904, power part; 905, heating part; 10, conversion piece.

[0074] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0075] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0076] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0077] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] During the daily use of a dishwasher, there are problems such as a small air volume and high noise in the drying fan; during the process of the airflow generated by the fan being transported to the accommodation chamber 1, there are serious losses and low transmission efficiency; water or steam in the inner liner of the dishwasher flows back along the air duct, causing corrosion or mildew of the fan; at the same time, the tableware residues are not thoroughly cleaned, and the steam wash can only clean the tableware and can only achieve partial sterilization, unable to achieve large-scale sterilization; at the same time, for tableware with a relatively high viscosity or that has not been cleaned for a long time, high-pressure water cannot effectively clean it, and the steam wash usually has a separate water inlet pipeline, with a cumbersome structure and waste of resources. In view of the above technical problems, the present invention develops the following technical solutions.

[0079] Figure 1 and Figure 2 are the first and second schematic diagrams of the overall assembly of the air duct structure of the dishwasher of the present invention, mainly showing the assembly position relationship between the accommodation chamber 1 described in the present invention and the air duct. As can be seen from Figure 1 and Figure 2 the air duct of the present invention includes an air inlet channel 2, an air guiding channel 3, and an air outlet channel 4. An air fan unit 201 is externally connected to the air inlet channel 2. A conversion member 10 is further included at the setting position of the air fan unit 201 and the air inlet channel 2. A heating unit 202 is installed in the conversion member 10. Of course, during the setting process, according to actual needs, the heating unit 202 and the conversion member 10 can be omitted, which is only an embodiment of the present invention; further, the air inlet channel 2 is arranged at the bottom of the accommodation chamber 1, the air guiding channel 3 is closely attached to the side wall of the accommodation chamber 1, and the air outlet channel 4 is closely attached to the top of the accommodation chamber 1. At the same time, the air outlet channel 4 is arranged in an approximately C-shaped arc structure. After the airflow generated by the air fan unit 201 passes through the air inlet channel 2, the air guiding channel 3, and the air outlet channel 4, it enters the accommodation chamber 1.

[0080] Figures 3 to 5 are the first and second schematic diagrams of the air duct structure and the schematic diagram of the air fan unit 201 of the present invention. As can be seen from Figures 3 to 5As can be seen, the air duct includes an air inlet channel 2, an air guiding channel 3, and an air outlet channel 4. At the same time, the fan unit 201 and the conversion part 10 are connected to the air inlet channel 2. A heating unit 202 is arranged inside the conversion part 10. When the conversion part 10 is connected to the air inlet channel 2, complete sealing and fixation of the two are achieved by injecting sealant. The connection between the rotating ring part and the fan unit 201 is realized through a detachable threaded structure. In addition, during the conversion of the air duct, an arc-shaped transition structure 6 is provided. At the place where the cross-sectional area of the air duct changes, the transition structure 6 is set so that the flowing air can be guided by the arc-shaped transition structure 6 to change its flow direction, avoiding hard contact between the air flow direction and the inner wall of the air duct. While passing through quickly, the loss of air volume is greatly reduced. And at the air guiding channel 3, a water storage tank 301 is also provided. A structure for guiding the water or steam flowing back from the air outlet channel 4 to the water storage tank 301 is formed on the inner wall of the air guiding channel 3. The structure of the inner wall of the air guiding channel 3 can be understood as a structure inclined towards the water storage tank 301. The steam adhering to the inner wall of the air guiding channel 3 converges into the water storage tank 301 under the action of the inclined inner wall.

[0081] Figures 6 to 9 Figures 1, 2, 3, and 4 are schematic views of the air outlet channel 4 of the present invention. As can be seen from the drawings, the air outlet channel 4 is an approximately C-shaped arc structure. An air inlet 401 communicating with the air guiding channel 3 and an air outlet 402 communicating with the accommodation chamber 1 are arranged inside the air outlet channel 4. A water blocking rib 409, a guiding plate 405, and a first bottom surface 403 and a second bottom surface 404 with a height difference are also arranged inside the air outlet channel 4. Among them, the guiding plate 405 is also an arc structure and has the same arc as the arc-shaped side wall of the air outlet channel 4. While guiding the air flow inside the air outlet channel 4, it also prevents the backflow of water or steam in the accommodation chamber 1. The water or steam in the accommodation chamber 1 is effectively blocked outside the drainage air duct under the action of the arc-shaped side wall of the air outlet channel 4, the guiding plate 405, the height difference between the first bottom surface 403 and the second bottom surface 404, and the water blocking rib 409, avoiding the water or steam flowing along the drainage air duct to the fan unit 201 and causing damage to the fan unit 201. In addition, a grille 406 is arranged at the air outlet 402 of the air outlet channel 4; a plurality of grille blades 407 are arranged at intervals on the grille 406; further, the grille blades 407 can rotate around an axis, and at least two of the grille blades 407 rotate at different angles and directions around the axis, thereby adjusting the air outlet angle of the grille blades 407; furthermore, the grille 406 and the air outlet 402 are detachably connected. Claws are arranged on the periphery of the grille 406, and clamping grooves corresponding to the claws are arranged at the air outlet 402; the claws and the clamping grooves cooperate to realize the disassembly of the grille 406 and the air outlet 402, facilitating the cleaning and maintenance of the grille 406 by the user.

[0082] Figures 10 to 12It is a schematic diagram of the exhaust air channel 8 of the present invention and the first and second schematic diagrams of the channel of the adjustment component 801. As can be seen from the figure, the present invention provides an adjustment component 801 on the exhaust air channel 8 that can connect or disconnect the exhaust air channel 8. By providing an adjustment mechanism on the exhaust air channel 8 that can adjust the size of the air outlet, the size of the area of the air outlet 402 can be adjusted, which can ensure the temperature during the dishwashing process of the dishwasher, save energy, and reduce the risk of water being discharged from the exhaust air duct to the outside world; during the drying stage, the air outlet can be opened through the mechanism to accelerate the discharge of air and achieve rapid drying; at the same time, the adjustment component 801 of the present invention adopts two technical solutions, which can move horizontally and rotate by flipping, and the shape of the exhaust air channel 8 can have various changes. Although in Figure 11 and Figure 12 it is only a rectangular exhaust air channel 8, it can be adjusted according to the actual situation and needs. The operating model of the adjustment mechanism and the shape of the exhaust air channel 8 are set to enhance the adaptability of the adjustment mechanism and the adaptability to different dishwasher models and different-shaped exhaust air channels 8. At the same time, through the adjustment of the exhaust air channel 8 by the adjustment mechanism, the requirements for exhaust air at different gears and different drying conditions are met.

[0083] Figure 13 It is a schematic diagram of the steam generating component 9 of the present invention. As can be seen from the figure, the accommodation chamber 1 is connected to the steam generating component 9. By providing a steam generating component 9 connected to the accommodation chamber 1, steam is generated using the water in the accommodation chamber 1 to achieve the cleaning of tableware and avoid the problem of separate water intake; by converting the water in the accommodation chamber 1 into high-temperature water vapor, the temperature of the chamber can be rapidly increased within a short time, effectively playing the role of sterilization and removing stains on the tableware.

[0084] Figure 14 It is a schematic diagram of the process flow logic of the steam generating component 9 of the present invention. During the pre-washing process of step S2 described in Figure 14 , before performing the pre-washing operation, a steam washing operation is first performed on the dishwasher. The steam used in the steam washing operation comes from the steam generating component 9 connected to the accommodation chamber 1. During the pre-washing before the dishwasher is cleaned, a steam generator component connected to the accommodation chamber 1 is used to generate high-temperature water vapor and transport it into the accommodation chamber 1 of the dishwasher, which can quickly increase the temperature in the accommodation chamber 1. The humidity and high temperature of the water vapor can effectively soften the residues with relatively high viscosity or large hardness, and then the stubborn stains on the tableware can be easily removed using high-pressure water.

[0085] Based on the above Figures 1 to 14 description, when the technical solution of the present invention is applied to a specific embodiment, it is as follows.

[0086] Embodiment 1

[0087] AsFigure 1 and Figure 2 As shown in Figure 2 , the air duct structure of a dishwasher according to this embodiment includes an air duct communicating with the accommodation chamber 1 of the dishwasher; a fan unit 201, a heating unit 202, a flow guiding structure and an anti-backflow structure are arranged in the air duct; the heating unit 202 is used to heat the air flow generated by the fan unit 201 to form dry hot air flowing into the accommodation chamber 1 through the air inlet channel 2; the flow guiding structure guides the air flow with disordered flow direction flowing through the air duct into an air flow with uniform flow direction; the anti-backflow structure prevents water or steam in the accommodation chamber 1 from flowing back into the air duct.

[0088] In the present invention, by providing an air duct structure that fits the accommodation chamber 1 of the dishwasher and has a changing air flow area in the air duct, it is realized that the air flow quickly passes through the air duct and enters the accommodation chamber 1 with small air volume loss; by arranging a flow guiding structure in the air duct to guide the disordered air flow flowing through the air duct, the air flow area after guiding is stable and uniform, and after passing through the gratings 406 with different angles at the air outlet 402 of the air duct, it is evenly dispersed into the accommodation chamber 1; by arranging an anti-backflow structure in the air duct, it is avoided that water or steam in the accommodation chamber 1 flows back along the air duct, causing damage to the fan unit 201, or remaining in the air duct and causing corrosion and mildew.

[0089] Embodiment Two

[0090] As Figures 3 to 5 shown in Figures 3 to 5 , this embodiment is a further limitation of the above Embodiment One. In this embodiment, the air duct includes an air inlet channel 2, an air guiding channel 3 and an air outlet channel 4 that are connected in sequence and communicate with the accommodation chamber 1; the air inlet channel 2 is provided with a fan unit 201 and a heating unit 202; the air guiding channel 3 is at least partially attached to the outer wall of the accommodation chamber 1; the air outlet channel 4 is at least partially attached to the top wall of the accommodation chamber 1 and at least communicates with the accommodation chamber 1; further, the heating unit 202 is arranged in the area formed inside the air inlet channel 2 in the air inlet direction of the fan unit 201. By adding the heating unit 202 in the air duct, the air flow flowing through the air duct is heated to quickly dry the internal environment of the washing machine.

[0091] Embodiment Three

[0092] As Figures 3 to 5As shown in the figure, this embodiment further limits the above-mentioned Embodiment 1 or Embodiment 2. The fan unit 201 in this embodiment is a cross-flow fan disposed in the air inlet passage 2. By providing a cross-flow fan in the air inlet passage 2, a large amount of dry air source is provided. At the same time, the cross-flow fan operates with low noise, reducing the impact on the environment around the dishwasher and providing a more comfortable environment for the user. Further, the heating unit 202 is a PTC heater disposed in the air inlet passage 2. By adding a PTC heater in the air duct, the air flow passing through the air duct is heated to achieve rapid drying of the internal environment of the washing machine. At the same time, through the installation position setting of the PTC heater, the PTC heating area is increased, the air resistance can be reduced, and the air volume loss of the air passing through the PTC can be reduced.

[0093] Embodiment 4

[0094] As Figures 3 to 5 As shown in the figure, this embodiment further limits any one of the above-mentioned Embodiments 1 to 3. At the connection between the air inlet passage 2 and the air guiding passage 3, and between the air guiding passage 3 and the air outlet passage 4, an arc-shaped transition structure 6 is provided. The arc-shaped transition structure 6 forms a trend to introduce the air flow generated by the fan unit 201 from the air inlet passage 2 into the air guiding passage 3 and the air outlet passage 4. At the air duct exchange, that is, at the place where the air flow domain area in the air duct changes, an arc-shaped transition structure 6 is provided, so that the flowing air flow can change its direction under the guidance of the arc-shaped transition structure 6, avoiding the hard contact between the air flow direction and the inner wall of the air duct. While passing through quickly, the air volume loss is greatly reduced. The air duct formed by the air guiding passage 3 on the outer wall of the accommodating chamber 1 is in a straight-line structure that is convenient for the air flow to pass through. The straight-line air duct structure is convenient for the air flow to pass through quickly, avoiding the air volume loss caused by an air duct with too many arcs or corners. The cross-sectional area of the air flow domain in the air guiding passage 3 is smaller than the cross-sectional area of the air flow domain in the air inlet passage 2. The area difference between the two air duct air flow domains is beneficial to the acceleration of the air flow during the flowing process. When the air flow enters the air duct with a small area domain from the air duct with a large area domain, a higher transfer speed is obtained, and it quickly passes through the air duct with a small area domain, thereby improving the transfer efficiency of the air flow in the air duct and avoiding the loss of air volume.

[0095] Embodiment 5

[0096] As Figures 6 to 9As shown, this embodiment is a further limitation of the above-described Embodiment 1 to Embodiment 4. The air outlet passage 4 in this embodiment includes an air inlet 401 and an air outlet 402; the air inlet 401 is communicated with the air guiding passage 3; the air outlet 402 is communicated with the accommodation chamber 1. The airflow generated by the fan unit 201 enters the air outlet passage 4 from the air inlet 401 after passing through the air inlet passage 2 and the air guiding passage 3. Under the guiding action of the guiding structure such as the guiding plate 405 in the air outlet passage 4, the airflow with disordered flow direction is changed into the airflow with uniform flow direction, and finally enters the accommodation chamber 1 from the air outlet 402.

[0097] Embodiment 6

[0098] As Figures 6 to 9 shown, this embodiment is a further limitation of the above-described Embodiment 5. The airflow area formed by the air outlet passage 4 from the air inlet 401 to the air outlet 402 side gradually increases. As the airflow area from the air inlet 401 to the air outlet 402 continuously increases, when the airflow passes through this area, the fast flow in the drainage passage becomes slow as the drainage area expands, which is beneficial to the deceleration of the airflow and facilitates the guiding of the airflow passing through by the guiding plate 405 and the air outlet passage 4, so that the airflow with disordered drainage becomes the airflow with stable and uniform drainage.

[0099] Embodiment 7

[0100] As Figures 6 to 9 shown, this embodiment is a further limitation of the above-described Embodiment 5 or Embodiment 6. The bottom wall of the air outlet passage 4 in this embodiment is provided with a first bottom surface 403 and a second bottom surface 404; the air inlet 401 is provided on the first bottom surface 403; the air outlet 402 is provided on the second bottom surface 404; a height difference is formed between the first bottom surface 403 and the second bottom surface 404, and the distance from the first bottom surface 403 to the top wall of the air outlet passage 4 is less than the distance from the second bottom surface 404 to the top wall of the air outlet passage 4; the height difference enables the airflow flowing in the air guiding passage 3 to obtain a tendency to flow into the accommodation chamber 1 when flowing through the air outlet passage 4, improving the efficiency of the airflow flow and avoiding the loss of the airflow in the air duct; at the same time, when the water or steam in the accommodation chamber 1 flows back along the air outlet passage 4, the height difference can also play a role in changing the flow direction of the water or steam, thereby playing a blocking role.

[0101] Embodiment 8

[0102] As Figures 6 to 9As shown in the figure, this embodiment is a further limitation of the above-mentioned Embodiment 7. In this embodiment, when the airflow generated by the fan unit 201 flows in the air outlet channel 4 from the side of the air inlet 401 to the side of the air outlet 402, the height difference between the first bottom surface 403 and the second bottom surface 404 forms the diversion structure. The height difference causes the flowing airflow to form a downward flow trend, enhancing the trend of the airflow to flow from the top of the accommodation chamber 1 into the accommodation chamber 1. Further, when the water or steam in the accommodation chamber 1 flows in the air outlet channel 4 from the side of the air outlet 402 to the side of the air inlet 401, the height difference between the first bottom surface 403 and the second bottom surface 404 forms the anti-backflow structure. The height difference causes the flow trajectory of the water or steam flowing back from the accommodation chamber 1 to change, reducing the fluidity of the water or steam.

[0103] By changing the airflow domain of the air duct and setting two planes with different heights at the air outlet 402, a multiple superposition of the effect of accelerating the flowing airflow is formed, ensuring that the airflow is quickly and evenly diverted in the air duct and accelerated into the accommodation chamber 1. At the same time, a multiple superposition and anti-backflow effect on the flowing water or steam is formed, further avoiding the water or steam in the accommodation chamber 1 flowing back along the air duct, causing damage to the fan unit 201, or remaining in the air duct and causing corrosion and mildew.

[0104] Embodiment Nine

[0105] As Figures 6 to 9 shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 8. In this embodiment, the side wall of the air outlet channel 4 is arranged in an arc shape, which cooperates with the guide plate 405 to form a structure for adjusting the flowing airflow. At least part of the arc-shaped side wall of the air outlet channel 4 is in a C-shaped structure. By setting the shape of the air duct at the top of the accommodation chamber 1 as an arc-shaped structure similar to a "C", it is avoided that during the operation of the dishwasher, water or steam flows back from the air duct, causing damage or corrosion to the cross-flow fan.

[0106] Embodiment Ten

[0107] As Figures 6 to 9As shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 9. The diversion structure in this embodiment includes a plurality of guide plates 405 spaced apart on the bottom wall of the air outlet passage 4. The guide plates 405 divert the disordered airflow in the flowing area into a stable and uniform airflow in the area; the guide plates 405 divert the airflow flowing through the air outlet passage 4 from the air inlet 401 to the air outlet 402; further, the guide plates 405 are arranged in an arc shape, forming a trend of airflow flowing from the air inlet 401 to the air outlet 402; furthermore, the radian of the guide plates 405 is the same as the radian of the side wall of the air outlet passage 4. The guide plates 405 with the same radian as the side wall of the air duct enhance the guiding effect on the flowing airflow in the air duct, so that the airflow passes through the guide plates 405 and changes from disordered airflow to uniform-flowing airflow; at least part of the guide plates 405 is arranged on the first bottom surface 403.

[0108] Embodiment 11

[0109] As Figures 6 to 9 shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 10. The anti-backflow structure of the air duct structure of a dishwasher in this embodiment includes a water retaining rib 409 arranged on the first bottom surface 403; the water retaining rib 409 is arranged perpendicular to the flowing direction of water or steam in the air outlet passage 4, and the water retaining rib 409 further blocks the water or steam flowing in the air outlet passage 4.

[0110] From Figures 6 to 9 it can be seen that at the air outlet 402 of the air outlet passage 4, a grille 406 is further provided, and a plurality of grille pieces 407 are spaced apart on the grille 406; the grille pieces 407 can rotate around an axis, and at least two of the grille pieces 407 rotate around the axis at different angles and directions, thereby adjusting the air outlet angle of the grille pieces 407;

[0111] When the airflow generated by the fan unit 201 flows in the air outlet passage 4 from the side of the air inlet 401 to the side of the air outlet 402, the airflow in the air outlet passage 4 enters the accommodation chamber 1 at different angles and directions under the guidance of at least two grille pieces 407 with different angles and directions. The adjustment of different angles meets the customer's requirements for washing at different angles. A grille 406 with adjustable orientation is provided at the air outlet 402 of the air duct. Further, during the adjustment process of the grille 406, it will at least face two different directions, which ensures the uniform-flow effect of the airflow when passing through the air duct and entering the accommodation chamber 1.

[0112] When the water or steam in the accommodation chamber 1 flows in the air outlet passage 4 from one side of the air outlet 402 towards the air inlet 401, at least part of the water or steam in the accommodation chamber 1 is blocked outside the air outlet passage 4 under the action of the grid pieces 407 with different angles and directions. A grille 406 with adjustable orientation is provided at the air outlet 402 of the air duct. Further, during the adjustment process of the grille 406, it will at least face two different directions, realizing the primary blocking of the water or steam in the accommodation chamber 1 from entering the air duct and reducing the probability of the water or steam flowing back along the air duct.

[0113] Embodiment Twelve

[0114] As Figures 3 to 9 shown, this embodiment is a further limitation of any one of the above Embodiments 1 to 11. In the air duct structure of a dishwasher described in this embodiment, the grille 406 and the air outlet 402 are detachably connected; clamping claws are provided on the periphery of the grille 406; clamping grooves are provided at the air outlet 402 corresponding to the clamping claws; the clamping claws cooperate with the clamping grooves to realize the disassembly of the grille 406 and the air outlet 402, facilitating the user to clean and maintain the grille 406.

[0115] Specifically, during the assembly of the air duct, a plurality of clamping claws are evenly distributed around the grille 406. The air outlet passage 4 and the accommodation chamber 1 are fixed by the cooperation of the clamping claws and the clamping grooves provided corresponding to the clamping claws around the accommodation chamber 1. The arc surface of the air outlet passage 4 fits with the accommodation chamber 1, and the air inlet passage 2 fits with the outer side of the bottom of the accommodation chamber 1.

[0116] Embodiment Thirteen

[0117] As Figures 3 to 9 shown, this embodiment is a further limitation of any one of the above Embodiments 1 to 12. The anti-backflow structure described in this embodiment includes a switch part 408 provided in the air outlet passage 4 that can open or close the air outlet passage 4; the switch part 408 opens or closes the air outlet passage 4 at least along the direction of the airflow flowing in the air outlet passage 4; further, the switch part 408 is connected to a driving device; after receiving the signal to open or close, the driving device drives the switch part 408 to open or close the air outlet passage 4; furthermore, at least the outer edge of the switch part 408 is wrapped with an elastic sealing structure, and the sealing structure ensures the sealing effect of the air outlet passage 4 when the switch part 408 is in the closed state; when the switch part 408 is closed, the sealing structure cooperates with the inner wall of the air outlet passage 4 to seal the air outlet passage 4 by the switch part 408.

[0118] Embodiment Fourteen

[0119] AsFigure 4 As shown, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 13. The anti-backflow structure in this embodiment further includes a water storage tank 301 provided at the bottom of the air induction channel 3. The water storage tank 301 enables the residual water in the air duct to be concentrated and stored in one place; a structure is formed on the inner wall of the air induction channel 3 to divert the water or steam flowing back from the air outlet channel 4 to the water storage tank 301, so that after the residual steam liquefies on the inner wall of the air duct, it can be diverted to the water storage tank 301; a drain port is provided at the lowest end of the water storage tank 301, which avoids the corrosion and deterioration caused by the long-term residue of the washing water in the air duct after the water or steam in the accommodation chamber 1 flows back along the air duct; the opening and closing of the drain port is realized by a plug body that can be pulled or rotated; the pulling or rotation of the plug body is realized manually or electrically.

[0120] Embodiment 15

[0121] As Figures 10 to 12 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 14. The air duct structure of a dishwasher in this embodiment further includes an exhaust air channel 8 communicated with the accommodation chamber 1. The exhaust air channel 8 is used to discharge the gas in the accommodation chamber 1 out of the dishwasher; further, an adjustment assembly 801 is provided in the exhaust air channel 8 to realize the connection or disconnection between the exhaust air channel 8 and the accommodation chamber 1. An adjustment mechanism capable of adjusting the size of the air outlet is provided in the exhaust air channel 8 to realize the adjustable size of the area of the air outlet 402, that is, it can ensure the temperature during the washing of the dishwasher, save energy, and reduce the risk of water being discharged from the exhaust air duct to the outside during washing; in the drying stage, the air outlet can be opened through the mechanism to accelerate the discharge of air and quickly dry, and avoid the loss of heat from the accommodation chamber 1.

[0122] Embodiment 16

[0123] As Figures 10 to 12As shown in the figure, this embodiment is a further limitation of the above-mentioned fifteenth embodiment. The adjustment assembly 801 in this embodiment includes a first adjustment unit 802 and a second adjustment unit 803. The first adjustment unit 802 is arranged in the exhaust air duct 8 to connect or disconnect the exhaust air duct 8 from the accommodation chamber 1. The second adjustment unit 803 is connected to the first adjustment unit 802 to provide power for the first adjustment unit 802 to connect or disconnect the exhaust air duct 8 from the accommodation chamber 1. An adjustment mechanism for adjusting the size of the air outlet is arranged in the exhaust air duct 8 to enable the area of the air outlet 402 to be adjustable, which can ensure the temperature during the dishwasher washing, save energy, and reduce the risk of water being discharged from the exhaust air duct to the outside during washing. During the drying stage, the air outlet can be opened through the mechanism to accelerate the discharge of air, quickly dry, and avoid the loss of heat from the accommodation chamber 1.

[0124] Embodiment Seventeen

[0125] As Figures 10 to 12 shown in the figure, this embodiment is a further limitation of the above-mentioned fifteenth or sixteenth embodiment. A slideway is arranged in the exhaust air duct 8 in this embodiment. The first adjustment unit 802 is arranged in the slideway and moves linearly under the action of the second adjustment unit 803, thereby realizing the connection or disconnection between the exhaust air duct 8 and the accommodation chamber 1. Further, the area of the exhaust air duct 8 blocked by the first adjustment unit 802 is S1, and the area of the exhaust air duct 8 is S2. The ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

[0126] The operation model of the adjustment mechanism and the shape of the exhaust air duct 8 are set, which enhances the adaptability of the adjustment mechanism and the adaptability to different dishwasher models and different-shaped exhaust air ducts 8. At the same time, through the adjustment of the exhaust air duct 8 by the adjustment mechanism, the requirements for exhaust at different gears and different drying conditions are met.

[0127] Embodiment Eighteen

[0128] As Figures 10 to 12 shown in the figure, this embodiment is a further limitation of the above-mentioned fifteenth or sixteenth embodiment. The first adjustment unit 802 and the second adjustment unit 803 are connected by a rotating shaft 804 in this embodiment. The first adjustment unit 802 rotates in the exhaust air duct 8 under the action of the second adjustment unit 803, thereby realizing the connection or disconnection between the exhaust air duct 8 and the accommodation chamber 1. The rotating shaft 804 is arranged at a position close to one end face of the first adjustment unit 802 or at the rotation center. The area of the exhaust air duct 8 blocked by the first adjustment unit 802 is S1, and the area of the exhaust air duct 8 is S2. The ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

[0129] The operating model of the adjustment mechanism and the shape of the exhaust air duct 8 are set, enhancing the adaptability of the adjustment mechanism and the adaptability to different dishwasher models and different-shaped exhaust air ducts 8. At the same time, through the adjustment of the exhaust air duct 8 by the adjustment mechanism, the requirements for exhaust at different gears and different drying conditions are met.

[0130] Example Nineteen

[0131] As Figure 13 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 to Embodiment 18. The air duct structure of a dishwasher described in this embodiment further includes a steam generation assembly 9 communicated with the accommodation chamber 1. The steam generation assembly 9 uses the water in the accommodation chamber 1 to generate steam and transports it back into the accommodation chamber 1, thereby realizing steam washing of the articles to be washed.

[0132] Wherein, the steam generation assembly 9 includes a first connecting pipe 901, a second connecting pipe 902, a third connecting pipe 903, a power part 904 and a heating part 905; the first connecting pipe 901 is communicated with the power part 904; the third connecting pipe 903 is communicated with the heating part 905; the first connecting pipe 901 and the third connecting pipe 903 are respectively communicated with the accommodation chamber 1; the second connecting pipe 902 communicates the power part 904 and the heating part 905. By setting the steam generation assembly 9 communicated with the accommodation chamber 1 in the present invention, steam is generated by using the water in the accommodation chamber 1, and the steam is used to clean the tableware, and the problem of separately introducing water is avoided.

[0133] Further, the water in the accommodation chamber 1, under the action of the power part 904, enters the power part 904 after passing through the first connecting pipe 901; the water is pressurized in the power part 904 and then enters the heating part 905 through the second connecting pipe 902, and under the action of the heating part 905, it is heated to boiling to form high-temperature water vapor; the high-temperature water vapor enters the accommodation chamber 1 after passing through the third connecting pipe 903, realizing steam washing of the articles to be washed in the accommodation chamber 1. By converting the water in the accommodation chamber 1 into high-temperature water vapor, the chamber temperature is rapidly increased within a short time, effectively playing the role of sterilization and removing stains on the tableware.

[0134] Furthermore, the temperature of the high-temperature water vapor is 100 °C; the first connecting pipe 901 and the third connecting pipe 903 are flexible hoses; wherein, the third connecting pipe 903 is a high-temperature-resistant flexible hose.

[0135] Example Twenty

[0136] As Figure 13As shown, this embodiment is a further limitation of the nineteenth embodiment above. The air duct structure of a dishwasher in this embodiment further includes a sink configured to hold items to be washed; the space in the sink for holding items to be washed forms the accommodation chamber 1.

[0137] Embodiment Twenty - One

[0138] As Figure 14 shown, this embodiment is a further limitation of the nineteenth or twentieth embodiment above. The method of using the steam generation component 9 in this embodiment includes the following steps:

[0139] S1. Startup process: Connect the startup power supply.

[0140] S2. Pre - washing process: Perform a water inlet operation on the dishwasher and conduct pre - washing. After the items to be washed in the accommodation chamber 11 are pre - washed, perform a drainage operation.

[0141] S3. Rinsing process: Perform a water inlet operation on the dishwasher and conduct rinsing. After the items to be washed in the accommodation chamber 11 are rinsed, perform a drainage operation.

[0142] S4. Drying process: Perform a drying operation on the dishwasher.

[0143] Embodiment Twenty - Two

[0144] As Figure 14 shown, this embodiment is a further limitation of the twenty - first embodiment above. In the pre - washing process of step S2 in the method of using the steam generation component 9 in this embodiment, before performing the pre - washing operation, first perform a steam washing operation on the dishwasher; the steam used in the steam washing operation comes from the steam generation component 9 communicated with the accommodation chamber 1.

[0145] Embodiment Twenty - Three

[0146] As Figure 14 shown, this embodiment is a further limitation of the twenty - first or twenty - second embodiment above. In the rinsing process of step S3 in the method of using the steam generation component 9 in this embodiment, perform at least two water inlet, rinsing, and drainage operations.

[0147] Embodiment Twenty - Four

[0148] As Figure 14 shown, this embodiment is a further limitation of any one of the twenty - first to twenty - third embodiments above. In the startup process of step S1 in the method of using the steam generation component 9 in this embodiment, after connecting the startup power supply, perform a drainage operation on the dishwasher to drain the remaining water in the accommodation chamber 1.

[0149] In the description provided herein, numerous specific details are set forth. It will be understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

[0150] Similarly, it should be understood that in order to streamline this disclosure and help understand one or more of the various inventive aspects, in the foregoing description of the exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, the inventive aspects lie in less than all the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0151] Except as mutually exclusive, any combination may be employed of all the features disclosed in this specification (including the accompanying claims, abstract and drawings), and all the processes or units of any method or apparatus so disclosed. Each feature disclosed in this specification (including the accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

[0152] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments but not others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any one of the claimed embodiments can be used in any combination.

[0153] It should be noted that the above embodiments illustrate rather than limit the invention, and that those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words may be interpreted as names.

[0154] The above are only the preferred embodiments of the present invention, and there is no limitation to the present invention in any form. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, may make some changes or modifications using the technical content prompted above to form equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An air duct structure of a dishwasher, characterized in that: Comprising An air inlet channel (2), an air guiding channel (3), and an air outlet channel (4) that are connected in sequence and communicate with the accommodation chamber (1) of the dishwasher; The air inlet channel (2) is provided with a fan unit (201); At least part of the air guiding channel (3) is attached to the outer wall of the accommodation chamber (1); The air outlet channel (4) communicates with the accommodation chamber (1) and at least part of it is attached to the top wall of the accommodation chamber (1); Wherein, A flow guiding structure and an anti-backflow structure are provided in the air outlet channel (4); The air flow entering the air outlet channel (4), under the action of the flow guiding structure, forms a uniformly flowing air flow and then enters the accommodation chamber (1); The anti-backflow structure is used to prevent water or steam in the accommodation chamber (1) from flowing back into the air duct; The air outlet channel (4) includes an air inlet (401) and an air outlet (402); The flow guiding structure includes a grille (406) provided at the air outlet (402); A plurality of grille blades (407) are arranged at intervals on the grille (406); The grille blades (407) can rotate around an axis, and at least two of the grille blades (407) rotate at different angles and directions around the axis; The air flow in the air outlet channel (4), under the guidance of at least two grille blades (407) with different angles and directions, enters the accommodation chamber (1) at different angles and directions.

2. The air duct structure of a dishwasher according to claim 1, characterized in that: At the connection of the air inlet channel (2) and the air guiding channel (3), and the connection of the air guiding channel (3) and the air outlet channel (4), an arc-shaped transition structure (6) is provided; The arc-shaped transition structure (6) forms a tendency to introduce the air flow generated by the fan unit (201) from the air inlet channel (2) into the air guiding channel (3) and the air outlet channel (4).

3. The air duct structure of a dishwasher according to claim 2, characterized in that: The air duct formed by the air guiding channel (3) on the outer wall of the accommodation chamber (1) is in a straight-line structure that facilitates the passage of air flow.

4. The air duct structure of a dishwasher according to claim 3, characterized in that: The cross-sectional area of the air flow domain in the air guiding channel (3) is smaller than the cross-sectional area of the air flow domain in the air inlet channel (2).

5. The air duct structure of a dishwasher according to claim 1, characterized in that: The air inlet (401) communicates with the air guiding channel (3); The air outlet (402) communicates with the accommodation chamber (1).

6. The air duct structure of a dishwasher according to claim 5, characterized in that: The air flow domain area formed by the air outlet channel (4) from the air inlet (401) to the air outlet (402) side gradually increases.

7. The air duct structure of a dishwasher according to claim 5, characterized in that: The flow guiding structure includes a first bottom surface (403) and a second bottom surface (404) provided on the bottom wall of the air outlet channel (4); The air inlet (401) is provided on the first bottom surface (403); The air outlet (402) is provided on the second bottom surface (404).

8. The air duct structure of a dishwasher according to claim 7, characterized in that: The first bottom surface (403) and the second bottom surface (404) are smoothly and transitionally connected, and a height difference forming the diversion structure is formed.

9. The air duct structure of a dishwasher according to claim 8, characterized in that: The distance from the first bottom surface (403) to the top wall of the air outlet passage (4) is less than the distance from the second bottom surface (404) to the top wall of the air outlet passage (4).

10. The air duct structure of a dishwasher according to claim 9, characterized in that: The side wall of the air outlet passage (4) is arc-shaped.

11. The air duct structure of a dishwasher according to claim 10, characterized in that: At least part of the arc-shaped side wall of the air outlet passage (4) is in a C-shaped structure.

12. The air duct structure of a dishwasher according to claim 7, characterized in that: The diversion structure includes a plurality of guide plates (405) spaced apart on the bottom wall of the air outlet passage (4); The guide plates (405) divert the air flow flowing through the air outlet passage (4) from the air inlet (401) to the air outlet (402).

13. The air duct structure of a dishwasher according to claim 12, characterized in that: The guide plates (405) are arc-shaped; A trend that the air flow flows from the air inlet (401) to the air outlet (402) is formed.

14. The air duct structure of a dishwasher according to claim 13, characterized in that: The radian of the guide plates (405) is the same as the radian of the side wall of the air outlet passage (4).

15. The air duct structure of a dishwasher according to claim 14, characterized in that: At least part of the guide plates (405) is arranged on the first bottom surface (403).

16. The air duct structure of a dishwasher according to claim 1, characterized in that: The grille (406) and the air outlet (402) are detachably connected.

17. The air duct structure of a dishwasher according to claim 16, characterized in that: At least the periphery of the grille (406) is provided with clamping claws; The air outlet (402) is provided with clamping grooves corresponding to the clamping claws; The clamping claws and the clamping grooves cooperate to realize the disassembly of the grille (406) and the air outlet (402).

18. A duct structure of a dishwasher according to any one of claims 1-17, characterized in that: The fan unit (201) is a cross-flow fan arranged in the air inlet passage (2).

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