Air duct structure of a dishwasher

Abstract

The present invention discloses an air duct structure of a dishwasher, which includes an air duct communicating with the accommodation chamber of the dishwasher and a steam generating assembly; a fan unit, an adjusting assembly and an anti-backflow structure are arranged in the air duct; the adjusting assembly is used to realize the connection or disconnection between the air duct and the accommodation chamber; the anti-backflow structure prevents water or steam in the accommodation chamber from flowing back into the air duct; the steam generating assembly uses the water in the accommodation chamber to generate steam and transports it back into the accommodation chamber, thereby realizing steam washing of the articles to be washed. The present invention provides an air duct structure of a dishwasher. Through the air duct with a changing air flow domain, the air flow can quickly pass through the air duct; and the exhaust port is set to be adjustable in size to reduce heat loss; in addition, a steam generating assembly communicating with the accommodation chamber is also provided. By introducing the water in the accommodation chamber into the steam generator to generate steam, the cleaning of tableware is finally realized.

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 disadvantages such as small air volume and high noise of the drying fan; large air volume loss when the fan supplies air to the containing chamber; water or steam in the inner tank of the dishwasher flows back along the air duct, causing corrosion or mold on the fan.

[0006] Therefore, it is necessary to improve the deficiencies and defects of the existing technology 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 pass through the air duct and enter the accommodation chamber with small air volume loss. At the same time, a structure is provided in the air duct to prevent water or steam in the accommodation chamber from flowing back along the air duct, ensuring the service life of the overall device and preventing mildew; in addition, by using a cross-flow fan, the air volume is increased, the noise is reduced, and the user experience is improved; and by setting the air outlet of the exhaust passage to be adjustable in size, during the dishwashing stage, the air outlet area is minimized to reduce heat dissipation, maintain the temperature, and at the same time prevent the cleaning water from entering the air duct; in addition, a steam generating component communicated with the accommodation chamber is provided. By introducing the water in the accommodation chamber into the steam generator to generate steam, the tableware can be washed, and by converting the water in the accommodation chamber into high-temperature water vapor, the chamber temperature can be rapidly increased in a short time, effectively playing the role of sterilization and removing stains on the tableware.

[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 existing technology 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 duct communicated with the accommodation chamber of the dishwasher and a steam generating component;

[0011] a fan unit, an adjustment component and an anti-backflow structure are arranged in the air duct;

[0012] the adjustment component is used to realize the connection or disconnection between the air duct and the accommodation chamber;

[0013] the anti-backflow structure prevents water or steam in the accommodation chamber from flowing back into the air duct;

[0014] the steam generating component uses the water in the accommodation chamber to generate steam and transports it back into the accommodation chamber, thereby realizing steam washing of the items to be washed.

[0015] Among them, the air duct includes

[0016] an air inlet passage, an air guiding passage and an air outlet passage that are communicated with the accommodation chamber and are sequentially connected;

[0017] A ventilation channel that communicates with the accommodation chamber and is used to discharge the gas in the accommodation chamber from the dishwasher;

[0018] The air inlet channel is provided with a fan unit;

[0019] At least part of the air guiding channel is attached to the outer wall of the accommodation chamber;

[0020] At least part of the air outlet channel is attached to the top wall of the accommodation chamber and is at least in communication with the accommodation chamber;

[0021] The exhaust channel is provided with the adjustment component for realizing the connection or disconnection between the exhaust channel and the accommodation chamber;

[0022] In one embodiment, an arc-shaped transition structure is provided at the connection between the air inlet channel and the air guiding channel, and between the air guiding channel and the air outlet channel;

[0023] The arc-shaped transition structure forms a tendency 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 cross-sectional area of the air flow domain in the air duct changes, an arc-shaped transition structure is provided, so that the flowing air flow can be guided by the arc-shaped transition structure to change the flow direction, 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;

[0024] In one embodiment, the air duct formed by the air guiding channel on the outer wall of the accommodation chamber has a linear structure that is convenient for the air flow to pass through. The linear air duct structure is convenient for the air flow to pass through quickly, avoiding the loss of air volume caused by an air duct with too many arcs or corners;

[0025] In one embodiment, the cross-sectional area of the air flow domain in the air guiding channel is smaller than the cross-sectional area of the air flow domain in the air inlet channel. The area difference between the air flow domains of the two air ducts is beneficial to the acceleration of the air flow during the flow process. When the air flow enters the air duct with a small cross-sectional area from the air duct with a large cross-sectional area, a higher transfer speed is obtained, and the air flow quickly passes through the air duct with a small cross-sectional area, thereby improving the transfer efficiency of the air flow in the air duct and avoiding the loss of air volume;

[0026] In one embodiment, the adjustment component includes a first adjustment unit and a second adjustment unit;

[0027] The first adjustment unit is arranged in the exhaust channel to connect or disconnect the exhaust channel from the accommodation chamber;

[0028] The second adjustment unit is connected to the first adjustment unit to provide power for the first adjustment unit, so as to connect or disconnect the exhaust air duct and the accommodation chamber. An adjustment mechanism for adjusting the size of the air outlet is provided in the exhaust air duct to enable the adjustment of the size of the air outlet area. That is, it can ensure the temperature during the dishwashing process of the dishwasher, save energy, and reduce the risk of water being discharged from the exhaust duct to the outside world. During the drying stage, the mechanism can be used to open the air outlet, accelerate the discharge of air, quickly dry, and avoid the loss of heat from the accommodation chamber;

[0029] In one embodiment, the fan unit is a cross-flow fan arranged in the air inlet duct. By arranging a cross-flow fan in the air inlet duct, a large amount of drying air source is provided. At the same time, the cross-flow fan runs with low noise, reduces the impact on the environment around the dishwasher, and provides a more comfortable environment for users.

[0030] In one embodiment, a slideway is arranged in the exhaust air duct;

[0031] The first adjustment unit is arranged in the slideway and moves linearly under the action of the second adjustment unit, thereby realizing the connection or disconnection of the exhaust air duct and the accommodation chamber;

[0032] In one embodiment, the area of the exhaust air duct blocked by the first adjustment unit is S1;

[0033] The area of the exhaust air duct is S2;

[0034] The ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

[0035] In one embodiment, the first adjustment unit is connected to the second adjustment unit through a rotating shaft;

[0036] The first adjustment unit rotates in the exhaust air duct under the action of the second adjustment unit, thereby realizing the connection or disconnection of the exhaust air duct and the accommodation chamber;

[0037] In one embodiment, the rotating shaft is arranged at a position close to one end face of the first adjustment unit or at the rotation center;

[0038] In one embodiment, the area of the exhaust air duct blocked by the first adjustment unit is S1;

[0039] The area of the exhaust air duct is S2;

[0040] The ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

[0041] In addition, the steam generating assembly includes a first connecting pipe, a second connecting pipe, a third connecting pipe, a power unit, and a heating unit;

[0042] The first connecting pipe is communicated with the power unit;

[0043] The third connecting pipe is communicated with the heating unit;

[0044] The first connecting pipe and the third connecting pipe are respectively communicated with the accommodation chamber;

[0045] The second connecting pipe communicates the power unit and the heating unit. By providing the steam generating assembly communicated with the accommodation chamber, the present invention realizes the generation of steam by using the water in the accommodation chamber, generates steam, realizes the cleaning of tableware, and avoids the problem of separately introducing water;

[0046] In one embodiment, the water in the accommodation chamber, under the action of the power unit, enters the power unit after passing through the first connecting pipe;

[0047] The water is pressurized in the power unit and then enters the heating unit through the second connecting pipe. Under the action of the heating unit, it is heated to boiling to form high-temperature water vapor;

[0048] The high-temperature water vapor enters the accommodation chamber after passing through the third connecting pipe, realizing the steam cleaning of the articles to be washed in the accommodation chamber. By converting the water in the accommodation chamber 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 tableware;

[0049] In one embodiment, the temperature of the high-temperature water vapor is 100 °C.

[0050] Furthermore, the first connecting pipe and the third connecting pipe are flexible hoses;

[0051] In one embodiment, the third connecting pipe is a high-temperature resistant flexible hose;

[0052] In one embodiment, it further includes

[0053] a sink configured to accommodate articles to be washed;

[0054] The space in the sink for accommodating articles to be washed forms the accommodation chamber.

[0055] Meanwhile, the air outlet channel includes an air inlet and an air outlet;

[0056] The air inlet is communicated with the air guiding channel;

[0057] The air outlet is communicated with the accommodation chamber;

[0058] In one embodiment, the air outlet passage forms an air flow basin area that gradually increases from the air inlet to the air outlet side. The continuous increase in the basin area from the air inlet to the air outlet is conducive to the deceleration of the air flow, facilitating the guide plate and the air outlet passage to guide the flowing air, so that the air flow with a disordered basin becomes a stable and uniform air flow with a smooth basin;

[0059] In one embodiment, the anti-backflow structure includes a grille provided at the air outlet;

[0060] A number of grid pieces are arranged at intervals on the grille;

[0061] In one embodiment, the grid piece can rotate around an axis, thereby adjusting the air outlet angle of the grid piece. Different angle adjustments meet the customer's needs for washing at different angles. A grille with an 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. This ensures a uniform air flow direction during the process of the air flow passing through the air duct and entering the accommodation chamber. At the same time, it realizes the primary blocking of water or steam in the accommodation chamber from entering the air duct, reducing the probability of water or steam flowing back along the air duct;

[0062] In one embodiment, at least two of the grid pieces rotate around the axis at different angles and directions;

[0063] The water or steam in the accommodation chamber is at least partially blocked outside the air outlet passage under the action of the grid pieces with different angles and directions. A grille with an 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, realizing the primary blocking of water or steam in the accommodation chamber from entering the air duct, reducing the probability of water or steam flowing back along the air duct;

[0064] In one embodiment, the grille is detachably connected to the air outlet;

[0065] In one embodiment, clamping claws are provided on the periphery of the grille;

[0066] The air outlet is provided with a clamping groove corresponding to the clamping claw;

[0067] The clamping claw cooperates with the clamping groove to realize the disassembly of the grille and the air outlet, facilitating the user to clean and maintain the grille.

[0068] Further, the anti-backflow structure includes a switch part provided in the air outlet passage that can open or close the air outlet passage. The switch part realizes the closure of the air outlet passage, ensuring the isolation of the air outlet passage from the dishwasher accommodation chamber, and avoiding the backflow of water or steam during the washing or steam drying process;

[0069] In one embodiment, the switching part opens or closes the air outlet channel at least along the direction in which the air flows in the air outlet channel;

[0070] In one embodiment, the switching part is connected to a driving device;

[0071] After receiving the signal to open or close, the driving device drives the switching part to open or close the air outlet channel;

[0072] In one embodiment, at least the outer edge of the switching part is wrapped with an elastic sealing structure, and the sealing structure ensures the sealing effect of the air outlet channel when the switching part is in the closed state;

[0073] When the switching part is closed, the sealing structure cooperates with the inner wall of the air outlet channel to seal the air outlet channel by the switching part.

[0074] Furthermore, the anti-backflow structure includes a first bottom surface and a second bottom surface provided on the bottom wall of the air outlet channel;

[0075] The air inlet is provided on the first bottom surface;

[0076] The air outlet is provided on the second bottom surface;

[0077] In one embodiment, a height difference forming the anti-backflow structure is provided between the first bottom surface and the second bottom surface, and the height difference changes the flow trajectory of the water or steam flowing back from the accommodation chamber, reducing the fluidity of the water or steam;

[0078] In one embodiment, the distance from the first bottom surface to the top wall of the air outlet channel is less than the distance from the second bottom surface to the top wall of the air outlet channel;

[0079] In one embodiment, the anti-backflow structure includes a water retaining rib provided on the first bottom surface;

[0080] The water retaining rib is arranged perpendicular to the flow direction of the water or steam in the air outlet channel, and the water retaining rib further blocks the water or steam flowing in the air outlet channel.

[0081] Moreover, the anti-backflow structure further includes a water storage tank provided at the bottom of the air guiding channel, and the water storage tank enables the residual water in the air duct to be concentrated and stored in one place;

[0082] In one embodiment, the inner wall of the air guiding channel is formed with a structure for guiding the water or steam flowing back from the air outlet channel to the water storage tank, so that after the residual steam liquefies on the inner wall of the air duct, it can be guided to the water storage tank;

[0083] In one embodiment, a drain outlet is provided at the lowest end of the water storage tank, which prevents water or steam in the accommodation chamber from flowing back along the air duct, resulting in long-term residue of washing water in the air duct and causing corrosion and deterioration.

[0084] In one embodiment, the drain outlet is opened and closed by a plug body that can be pulled or rotated.

[0085] In one embodiment, the pulling or rotation of the plug body is achieved manually or electrically.

[0086] In one embodiment, 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.

[0087] In one embodiment, at least part of the arc-shaped side wall of the air outlet channel is in a C-shaped structure. By setting the shape of the air duct at the top of the accommodation chamber to an arc-shaped structure similar to a "C", it is possible to prevent water or steam from flowing back along the air duct during the operation of the dishwasher, thereby avoiding damage or corrosion of the cross-flow fan.

[0088] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art:

[0089] 1. The present invention realizes the rapid passage of air current through the air duct into the accommodation chamber with small air volume loss by setting an air duct structure that fits the accommodation chamber of the dishwasher and has a changing air current flow area in the air duct.

[0090] 2. By setting an anti-backflow structure in the air duct, it is possible to prevent water or steam in the accommodation chamber from flowing back along the air duct, avoiding damage to the fan unit or the occurrence of corrosion and mildew due to residue in the air duct.

[0091] 3. At the air duct exchange, that is, at the place where the air current flow area in the air duct changes, an arc-shaped transition structure is set, so that the flowing air current can be guided by the arc-shaped transition structure to change its flow direction, avoiding hard contact between the air current flow direction and the inner wall of the air duct. While passing through quickly, the loss of air volume is greatly reduced.

[0092] 4. Through the change of the air duct air current flow area and the setting of two planes with different heights at the air outlet, a multiple superposition and anti-backflow effect on the flowing water or steam is formed, further preventing water or steam in the accommodation chamber from flowing back along the air duct, avoiding damage to the fan unit or the occurrence of corrosion and mildew due to residue in the air duct.

[0093] 5. A grille with adjustable orientation is provided at the air outlet of the air duct. Further, during the adjustment process, the grille will at least face two different directions, realizing the primary blocking of water or steam in the accommodation chamber from entering the air duct and reducing the probability of water or steam flowing back along the air duct.

[0094] 6. By setting the air duct shape at the top of the accommodation chamber as an arc structure similar to a "C" shape, it is possible to avoid the backflow of water or steam from the air duct during the operation of the dishwasher, which may cause damage or corrosion to the cross-flow fan.

[0095] 7. By installing a cross-flow fan in the air inlet channel, a large amount of drying air source is provided. At the same time, the cross-flow fan operates with low noise, reducing the impact on the surrounding environment of the dishwasher and providing a more comfortable environment for users.

[0096] 8. An adjustment mechanism for adjusting the size of the air outlet is provided in the exhaust air channel, enabling the adjustable size of the air outlet area. This can ensure the temperature during the dishwashing process of the dishwasher, save energy, and reduce the risk of water discharging from the exhaust air duct to the outside. During the drying stage, the mechanism can be used to open the air outlet, accelerate the discharge of air, achieve rapid drying, and avoid the loss of heat from the accommodation chamber.

[0097] 9. The operating model of the adjustment mechanism and the shape of the exhaust air channel are set, enhancing the adaptability of the adjustment mechanism and different dishwasher models and different-shaped exhaust air channels. At the same time, through the adjustment of the exhaust air channel by the adjustment mechanism, the requirements for exhaust air at different gears and different drying conditions are met.

[0098] 10. In the present invention, by providing a steam generation component communicated with the accommodation chamber, it is possible to utilize the water in the accommodation chamber to generate steam, which can be used to clean the tableware and avoid the problem of separate water intake.

[0099] 11. By converting the water in the accommodation chamber into high-temperature water vapor, the temperature of the chamber can be rapidly increased within a short time, effectively playing a role in sterilization and removing stains on the tableware.

[0100] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0101] 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 are used to explain the present invention, but do not constitute an improper limitation to 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.

[0102] In the accompanying drawings:

[0103] Figure 1 is the first overall assembly schematic diagram of the air duct structure of the dishwasher of the present invention;

[0104] Figure 2It is the second schematic diagram of the overall assembly of the air duct structure of the dishwasher of the present invention;

[0105] Figure 3 It is the first schematic diagram of the air duct structure of the present invention;

[0106] Figure 4 It is the second schematic diagram of the air duct structure of the present invention;

[0107] Figure 5 It is the schematic diagram of the fan unit of the present invention;

[0108] Figure 6 It is the first schematic diagram of the air outlet channel of the present invention;

[0109] Figure 7 It is the second schematic diagram of the air outlet channel of the present invention;

[0110] Figure 8 It is the third schematic diagram of the air outlet channel of the present invention;

[0111] Figure 9 It is the fourth schematic diagram of the air outlet channel of the present invention;

[0112] Figure 10 It is the schematic diagram of the exhaust air channel of the present invention;

[0113] Figure 11 It is the first schematic diagram of the adjustment component channel of the present invention;

[0114] Figure 12 It is the second schematic diagram of the adjustment component channel of the present invention;

[0115] Figure 13 It is the schematic diagram of the steam generation component of the present invention;

[0116] Figure 14 It is the schematic diagram of the process logic of the use of the steam generation component of the present invention.

[0117] In the figure: 1, accommodation chamber; 2, air inlet channel; 201, fan unit; 202, heating unit; 3, air guiding channel; 301, water storage tank; 4, air outlet channel; 401, air inlet; 402, air outlet; 403, first bottom surface; 404, second bottom surface; 405, guiding plate; 406, grille; 407, grid piece; 408, switch part; 409, water retaining rib; 6, transition structure; 8, exhaust air 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 part.

[0118] 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 reference to specific embodiments. Detailed implementation manners

[0119] 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.

[0120] 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 accompanying drawings. It 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 to the present invention.

[0121] 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.

[0122] During the daily use of a dishwasher, there are problems such as a small air volume and high noise of 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 tank 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 only play a partial sterilization role, and cannot 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 has the following technical solutions.

[0123] 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 positional relationship between the accommodation chamber 1 described in the present invention and the air duct. From Figure 1 and Figure 2As can be seen, the air duct of the present invention includes an air inlet passage 2, an air guiding passage 3, and an air outlet passage 4. An air fan unit 201 is externally connected to the air inlet passage 2. At the setting position of the air fan unit 201 and the air inlet passage 2, there is also a conversion member 10, and 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 one embodiment of the present invention. Further, the air inlet passage 2 is arranged at the bottom of the accommodation chamber 1, the air guiding passage 3 is closely attached to the side wall of the accommodation chamber 1, and the air outlet passage 4 is closely attached to the top of the accommodation chamber 1. At the same time, the air outlet passage 4 is arranged in an approximately C-shaped arc structure. After the air flow generated by the air fan unit 201 passes through the air inlet passage 2, the air guiding passage 3, and the air outlet passage 4, it enters the accommodation chamber 1.

[0124] Figures 3 to 5 are the first and second schematic diagrams of the air duct structure of the present invention and the schematic diagram of the air fan unit 201. As can be seen from Figures 3 to 5 it, the air duct includes an air inlet passage 2, an air guiding passage 3, and an air outlet passage 4. At the same time, the air fan unit 201 and the conversion member 10 are connected to the air inlet passage 2. A heating unit 202 is arranged in the conversion member 10. When the conversion member 10 is connected to the air inlet passage 2, through injecting sealant, complete sealing and fixing of the two are achieved. The connection between the swivel member and the air fan unit 201 is realized through a detachable threaded structure. In addition, during the conversion of the air duct, there is also an arc-shaped transition structure 6. At the position where the cross-sectional area of the air duct changes, the transition structure 6 is arranged, so that the flowing air can be guided by the arc-shaped transition structure 6 to change the flow direction, 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. And, at the air guiding passage 3, there is also a water storage tank 301 arranged. The inner wall of the air guiding passage 3 forms a structure for guiding the water or steam flowing back from the air outlet passage 4 to the water storage tank 301. The structure of the inner wall of the air guiding passage 3 can be understood as a structure inclined towards the water storage tank 301. The steam attached to the inner wall of the air guiding passage 3 converges into the water storage tank 301 under the action of the inclined inner wall.

[0125] Figures 6 to 9These are the first, second, third, and fourth schematic views of the air outlet passage 4 of the present invention. As can be seen from the drawings, the air outlet passage 4 is an approximately C-shaped arc structure. An air inlet 401 communicating with the air guiding passage 3 and an air outlet 402 communicating with the accommodation chamber 1 are provided inside the air outlet passage 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 provided inside the air outlet passage 4. Among them, the guiding plate 405 is also an arc structure and has the same arc curvature as the arc-shaped side wall of the air outlet passage 4. While guiding the air flow inside the air outlet passage 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 passage 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 provided at the air outlet 402 of the air outlet passage 4. A number of grid pieces 407 are spaced apart on the grille 406. Further, the grid pieces 407 can rotate around an axis, and at least two of the grid pieces 407 rotate at different angles and directions around the axis, thereby adjusting the air outlet angle of the grid pieces 407. Furthermore, the grille 406 and the air outlet 402 are detachably connected. Claws are provided on the periphery of the grille 406, and clamping grooves corresponding to the claws are provided at the air outlet 402. The cooperation between the claws and the clamping grooves realizes the disassembly of the grille 406 and the air outlet 402, facilitating the user to clean and maintain the grille 406.

[0126] Figures 10 to 12 These are the schematic view of the exhaust air passage 8 of the present invention and the first and second schematic views of the passage of the adjustment assembly 801. As can be seen from the figure, the present invention provides an adjustment assembly 801 on the exhaust air passage 8 that can connect or disconnect the exhaust air passage 8. By providing an adjustment mechanism on the exhaust air passage 8 that can adjust the size of the exhaust port, the size of the air outlet 402 can be adjusted, 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. 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 assembly 801 of the present invention adopts two technical solutions, which can move horizontally and rotate by flipping, and the shape of the exhaust air passage 8 can be changed in various ways. Although the exhaust air passage 8 is only a rectangular one in Figure 11 and Figure 12 , 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 passage 8 are set to enhance the adaptability of the adjustment mechanism and the adaptability to different dishwasher models and different-shaped exhaust air passages 8. At the same time, through the adjustment of the exhaust air passage 8 by the adjustment mechanism, the requirements for exhaust at different gears and different drying conditions are met.

[0127] Figure 13 This is a schematic diagram of the steam generation component 9 of the present invention. As can be seen from the figure, the accommodation chamber 1 is communicated with the steam generation component 9. By providing the steam generation component 9 communicated with the accommodation chamber 1, steam is generated by using the water in the accommodation chamber 1, and the tableware is washed. Moreover, the problem of separate water intake is avoided. By converting the water in the accommodation chamber 1 into high-temperature water vapor, the temperature of the chamber is rapidly increased within a short time, which effectively plays the role of sterilization and removing stains on the tableware.

[0128] Figure 14 This is a schematic diagram of the process logic of using the steam generation 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 generation component 9 communicated with the accommodation chamber 1. During the pre-washing before the dishwasher cleaning, by using the steam generator component communicated with the accommodation chamber 1, high-temperature water vapor is generated and delivered 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 very high hardness, and then the stubborn stains on the tableware can be easily removed by using high-pressure water.

[0129] 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.

[0130] Embodiment 1

[0131] As Figure 1 and Figure 2 shown, a duct structure of a dishwasher described in this embodiment includes a duct communicated with the accommodation chamber 1 of the dishwasher; a fan unit 201, a heating unit 202, a flow guiding structure and a backflow prevention structure are arranged in the 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 duct into an air flow with uniform flow direction; the backflow prevention structure prevents the water or steam in the accommodation chamber 1 from flowing back into the duct.

[0132] The present invention realizes that the air flow quickly enters the accommodation chamber 1 through the air duct by setting an air duct structure that fits the accommodation chamber 1 of the dishwasher and has a changing air flow area in the air duct, and the air volume loss is small; by setting a flow guiding structure in the air duct, the turbulent air flow flowing through the air duct is guided, and the air flow area after guiding is stable and uniform. After passing through the gratings 406 with different angles at the air duct air outlet 402, it is evenly dispersed into the accommodation chamber 1; by setting an anti-backflow structure in the air duct, the water or steam in the accommodation chamber 1 is prevented from flowing back along the air duct, which may cause damage to the fan unit 201 or remain in the air duct, resulting in corrosion and mildew.

[0133] Embodiment 2

[0134] As Figures 3 to 5 shown, this embodiment is a further limitation of the above Embodiment 1. 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 realize the rapid drying of the internal environment of the washing machine.

[0135] Embodiment 3

[0136] As Figures 3 to 5 shown, this embodiment is a further limitation of the above Embodiment 1 or Embodiment 2. In this embodiment, the fan unit 201 is a cross-flow fan arranged in the air inlet channel 2. By arranging a cross-flow fan in the air inlet channel 2, a large amount of drying 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 users; further, the heating unit 202 is a PTC heater arranged in the air inlet channel 2. By adding a PTC heater in the air duct, the air flow flowing through the air duct is heated to realize the rapid drying of the internal environment of the washing machine. At the same time, by setting the installation position of the PTC heater, the PTC heating area is increased, and the air resistance can also be reduced, reducing the air volume loss of the air passing through the PTC.

[0137] Embodiment 4

[0138] As Figures 3 to 5As shown in the figure, this embodiment is a further limitation of 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 cross-sectional area of the air flow domain in the air duct changes, an arc-shaped transition structure 6 is provided, so that the flowing air flow can be guided by the arc-shaped transition structure 6 to change its flow direction, avoiding the 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; 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 loss of air volume 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 cross-sectional area from the air duct with a large cross-sectional area, it obtains a higher transfer speed and quickly passes through the air duct with a small cross-sectional area, thereby improving the transfer efficiency of the air flow in the air duct and avoiding the loss of air volume.

[0139] Embodiment Five

[0140] As Figures 6 to 9 shown in the figure, this embodiment is a further limitation of the above-mentioned Embodiments 1 to 4. The air outlet passage 4 of 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 accommodating chamber 1. The air flow 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 air flow with a disordered flow direction is changed into an air flow with a uniform flow direction, and finally enters the accommodating chamber 1 from the air outlet 402.

[0141] Embodiment Six

[0142] As Figures 6 to 9 shown in the figure, this embodiment is a further limitation of the above-mentioned Embodiment Five. The air flow domain area formed by the air outlet passage 4 gradually increases from the air inlet 401 to the air outlet 402 side. As the area of the air flow domain continuously increases from the air inlet 401 to the air outlet 402, when the air flow passes through this area, the fast flow in the diversion channel becomes slow as the area of the air flow domain expands, which is beneficial to the deceleration of the air flow and is convenient for the guiding plate 405 and the air outlet passage 4 to guide the flowing air flow, so that the air flow with a disordered flow domain becomes an air flow with a stable and uniform flow domain.

[0143] Embodiment Seven

[0144] As shown Figures 6 to 9 in the figure, this embodiment is a further limitation of the above Embodiment Five or Embodiment Six. On the bottom wall of the air outlet channel 4 in this embodiment, a first bottom surface 403 and a second bottom surface 404 are provided; 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 channel 4 is less than the distance from the second bottom surface 404 to the top wall of the air outlet channel 4; the height difference enables the airflow flowing in the air guiding channel 3 to obtain a tendency to flow into the accommodation chamber 1 when flowing through the air outlet channel 4, improving the efficiency of airflow and avoiding the loss of 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 channel 4, the height difference can also play a role in changing the flow direction of the water or steam, thereby playing a blocking role.

[0145] Embodiment Eight

[0146] As shown Figures 6 to 9 in the figure, this embodiment is a further limitation of the above Embodiment Seven. 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 in this embodiment, the height difference between the first bottom surface 403 and the second bottom surface 404 forms the diversion structure, and the height difference enables the flowing airflow to form a downward flowing tendency, enhancing the tendency 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, and the height difference changes the flow trajectory of the water or steam flowing back from the accommodation chamber 1, reducing the fluidity of the water or steam.

[0147] Through the change of the airflow domain in the air duct and the setting of 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 guided in the air duct and accelerated into the accommodation chamber 1, and at the same time forming a multiple superposition and anti-backflow effect on the flowing water or steam, further avoiding the situation that the 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.

[0148] Embodiment Nine

[0149] As shown Figures 6 to 9As shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 8. The side wall of the air outlet passage 4 in this embodiment is arranged in an arc shape, which cooperates with the guide plate 405 to form a structure for adjusting the flowing air; at least part of the arc-shaped side wall of the air outlet passage 4 is in a C-shaped structure. By setting the air duct shape at the top of the accommodation chamber 1 to an arc shape similar to a "C", it avoids the reverse flow of water or steam from the air duct during the operation of the dishwasher, causing damage or corrosion to the cross-flow fan.

[0150] Embodiment Ten

[0151] 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 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 air flow in the flowing area into a stable and uniform air flow; 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; further, the guide plates 405 are arranged in an arc shape, forming a trend of air flow 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 air in the air duct, making the air flow become a uniformly flowing air flow after passing through the guide plates 405; at least part of the guide plates 405 is arranged on the first bottom surface 403.

[0152] Embodiment Eleven

[0153] 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. In the air duct structure of a dishwasher in this embodiment, the anti-backflow structure 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.

[0154] 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 also 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 at different angles and directions around the axis, thereby adjusting the air outlet angle of the grille pieces 407;

[0155] 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 louvers 407 with different angles and directions. The adjustment of different angles meets the customer's needs 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, the grille 406 will at least face two different directions, which ensures a uniform flow direction effect when the airflow enters the accommodation chamber 1 through the air duct;

[0156] When the water or steam in the accommodation chamber 1 flows in the air outlet passage 4 from the side of the air outlet 402 to the side of 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 louvers 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, the grille 406 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.

[0157] Embodiment Twelve

[0158] As Figures 3 to 9 shown, this embodiment further limits any one of the above Embodiments One to Eleven. In the air duct structure of a dishwasher described in this embodiment, the grille 406 and the air outlet 402 are detachably connected; a claw is provided on the periphery of the grille 406; a slot is provided at the air outlet 402 corresponding to the claw; the claw and the slot cooperate to realize the disassembly of the grille 406 and the air outlet 402, facilitating the user to clean and maintain the grille 406.

[0159] Specifically, during the air duct assembly, a number of 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 claws and the slots provided corresponding to the 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 bottom of the accommodation chamber 1.

[0160] Embodiment Thirteen

[0161] As Figures 3 to 9As shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 12. The anti-backflow structure in this embodiment includes a switch portion 408 disposed in the air outlet passage 4 and capable of opening or closing the air outlet passage 4; the switch portion 408 opens or closes the air outlet passage 4 at least along the direction in which the air flows in the air outlet passage 4; further, the switch portion 408 is connected to a driving device; after receiving a signal to open or close, the driving device drives the switch portion 408 to open or close the air outlet passage 4; furthermore, at least the outer edge of the switch portion 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 portion 408 is in a closed state; when the switch portion 408 is closed, the sealing structure cooperates with the inner wall of the air outlet passage 4 to time the switch portion 408 to seal the air outlet passage 4.

[0162] Embodiment Fourteen

[0163] As Figure 4 shown in the figure, 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 disposed at the bottom of the air guiding passage 3. The water storage tank 301 enables the residual water in the air duct to be concentrated and stored in one place; a structure for guiding the water or steam flowing back from the air outlet passage 4 to the water storage tank 301 is formed on the inner wall of the air guiding passage 3, so that after the residual steam liquefies on the inner wall of the air duct, it can be guided 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 is pulled or rotated; the pulling or rotation of the plug body is realized manually or electrically.

[0164] Embodiment Fifteen

[0165] As Figures 10 to 12As shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 14. The air duct structure of a dishwasher described in this embodiment further includes an exhaust passage 8 communicating with the accommodation chamber 1. The exhaust passage 8 is used to discharge the gas in the accommodation chamber 1 out of the dishwasher. Further, the exhaust passage 8 is provided with an adjustment assembly 801 for realizing the connection or disconnection between the exhaust passage 8 and the accommodation chamber 1. An adjustment mechanism capable of adjusting the size of the air outlet is provided in the exhaust passage 8 to realize the adjustable size of the area of the air outlet 402, which can ensure the temperature during the washing of the dishwasher, save energy, and reduce the risk of water being discharged from the exhaust 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, quickly dry, and avoid the loss of heat from the accommodation chamber 1.

[0166] Embodiment 16

[0167] As Figures 10 to 12 shown in the figure, this embodiment is a further limitation of the above-mentioned Embodiment 15. The adjustment assembly 801 described 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 passage 8 to connect or disconnect the exhaust passage 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 realize the connection or disconnection between the exhaust passage 8 and the accommodation chamber 1. An adjustment mechanism capable of adjusting the size of the air outlet is provided in the exhaust passage 8 to realize the adjustable size of the area of the air outlet 402, which can ensure the temperature during the washing of the dishwasher, save energy, and reduce the risk of water being discharged from the exhaust 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, quickly dry, and avoid the loss of heat from the accommodation chamber 1.

[0168] Embodiment 17

[0169] As Figures 10 to 12 shown in the figure, this embodiment is a further limitation of the above-mentioned Embodiment 15 or Embodiment 16. A slideway is arranged in the exhaust passage 8 of 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 passage 8 and the accommodation chamber 1. Further, the area of the exhaust passage 8 blocked by the first adjustment unit 802 is S1, and the area of the exhaust passage 8 is S2. The ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

[0170] The operation 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.

[0171] Embodiment XVIII

[0172] As Figures 10 to 12 shown, this embodiment is a further limitation of the above Embodiment XV or Embodiment XVI. In this embodiment, the first adjustment unit 802 and the second adjustment unit 803 are connected by a rotating shaft 804; under the action of the second adjustment unit 803, the first adjustment unit 802 makes a rotational movement in the exhaust air duct 8, 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; the area of the exhaust air duct 8 is S2; the ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

[0173] The operation 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.

[0174] Embodiment XIX

[0175] As Figure 13 shown, this embodiment is a further limitation of any one of the above Embodiments 1 to 18. The air duct structure of a dishwasher in this embodiment further includes a steam generating assembly 9 communicated with the accommodation chamber 1. The steam generating 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.

[0176] Among them, the steam generating 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 connects the power part 904 and the heating part 905. By setting the steam generating assembly 9 communicated with the accommodation chamber 1 in the present invention, the use of the water in the accommodation chamber 1 to generate steam is realized, and steam is generated to clean the tableware, and the problem of separately introducing water is avoided.

[0177] Further, the water in the accommodation chamber 1 enters the power unit 904 after passing through the first connecting pipe 901 under the action of the power unit 904; the water is pressurized in the power unit 904 and then enters the heating unit 905 through the second connecting pipe 902, and is heated to boiling high-temperature steam under the action of the heating unit 905; the high-temperature steam 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 steam, the chamber temperature can be rapidly increased within a short time, effectively playing the role of sterilization and removing stains on tableware.

[0178] 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; among them, the third connecting pipe 903 is a high-temperature resistant flexible hose.

[0179] Embodiment Twenty

[0180] As Figure 13 shown, this embodiment is a further limitation of the above-mentioned Embodiment Nineteen. The air duct structure of a dishwasher in this embodiment further includes a water tank configured to accommodate articles to be washed; the space in the water tank for accommodating articles to be washed forms the accommodation chamber 1.

[0181] Embodiment Twenty - One

[0182] As Figure 14 shown, this embodiment is a further limitation of the above-mentioned Embodiment Nineteen or Embodiment Twenty. The usage method of the steam generating assembly 9 in this embodiment includes the following steps:

[0183] S1. Starting process, turn on the starting power supply;

[0184] S2. Pre - washing process, perform water inlet operation on the dishwasher and conduct pre - washing. After the articles to be washed in the accommodation chamber 11 are pre - washed, perform drainage operation;

[0185] S3. Rinsing process, perform water inlet operation on the dishwasher and conduct rinsing. After the articles to be washed in the accommodation chamber 11 are rinsed, perform drainage operation;

[0186] S4. Drying process, perform drying operation on the dishwasher.

[0187] Embodiment Twenty - Two

[0188] As Figure 14As shown, this embodiment is a further limitation of the above-mentioned Embodiment 21. In the method of using the steam generating assembly 9 in this embodiment, during the pre-washing process of step S2, 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 assembly 9 communicated with the accommodation chamber 1.

[0189] Embodiment 23

[0190] As Figure 14 shown, this embodiment is a further limitation of the above-mentioned Embodiment 21 or Embodiment 22. In the method of using the steam generating assembly 9 in this embodiment, during the rinsing process of step S3, at least two water inlet, rinsing, and drainage operations are performed.

[0191] Embodiment 24

[0192] As Figure 14 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiments 21 to 23. In the method of using the steam generating assembly 9 in this embodiment, during the startup process of step S1, after turning on the startup power supply, a drainage operation is performed on the dishwasher to drain the remaining water in the accommodation chamber 1.

[0193] In the specification provided herein, a large number of specific details are set forth. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0194] Similarly, it should be understood that in order to streamline this disclosure and assist in understanding one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting the intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspects lie in less than all of the features of the preceding single embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate embodiment of the present invention.

[0195] All features disclosed in this specification (including the accompanying claims, abstract and drawings), and all processes or units of any method or device so disclosed, may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Each feature disclosed in this specification (including the accompanying claims, abstract and drawings) may be replaced by an alternative feature serving the same, equivalent or similar purpose, unless expressly stated otherwise.

[0196] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain 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.

[0197] It should be noted that the above embodiments are illustrative of the invention and not restrictive thereof, and that alternative embodiments may be designed by those skilled in the art 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 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.

[0198] The above are only preferred embodiments of the present invention and not any form of limitation to the present invention. Although the present invention has been disclosed as above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent may make some changes or modifications to an equivalent embodiment by using the technical content prompted above within the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An air duct structure of a dishwasher, characterized in that: including an air duct and a steam generating assembly (9) that communicate with the receiving chamber (1) of the dishwasher; a fan unit (201), an adjustment assembly (801) and an anti-backflow structure are provided in the air duct; the adjustment assembly (801) is used to realize the connection or disconnection between the air duct and the receiving chamber (1); the anti-backflow structure prevents water or steam in the receiving chamber (1) from flowing back into the air duct; the steam generating assembly (9) uses the water in the receiving chamber (1) to generate steam and transports it back into the receiving chamber (1), thereby realizing steam washing of the articles to be washed; the air duct includes an air outlet channel (4), and the air outlet channel (4) includes an air inlet (401) and an air outlet (402); the anti-backflow 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), and 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); the distance from the first bottom surface (403) to the top wall of the air outlet channel (4) is less than the distance from the second bottom surface (404) to the top wall of the air outlet channel (4); a guiding structure is provided in the air outlet channel (4); the air flow entering the air outlet channel (4) forms a uniformly flowing air flow under the action of the guiding structure and then enters the receiving chamber (1).

2. The air duct structure of a dishwasher according to claim 1, wherein: the air duct includes an air inlet channel (2) and a guiding air channel (3) that communicate with the receiving chamber (1) and are connected in sequence; an exhaust air duct (8) that communicates with the receiving chamber (1) and is used to discharge the gas in the receiving chamber (1) from the dishwasher; the air inlet channel (2) is provided with a fan unit (201); at least part of the guiding air channel (3) is attached to the outer wall of the receiving chamber (1); at least part of the air outlet channel (4) is attached to the top wall of the receiving chamber (1) and is at least in communication with the receiving chamber (1); the exhaust air duct (8) is provided with the adjustment assembly (801) for realizing the connection or disconnection between the exhaust air duct (8) and the receiving chamber (1).

3. The air duct structure of a dishwasher according to claim 2, wherein: an arc-shaped transition structure (6) is provided at the connection between the air inlet channel (2) and the guiding air channel (3), and between the guiding air channel (3) and the air outlet channel (4); 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 guiding air channel (3) and the air outlet channel (4).

4. The air duct structure of a dishwasher according to claim 3, wherein: the air duct formed by the guiding air channel (3) on the outer wall of the receiving chamber (1) has a linear structure that facilitates the passage of air flow.

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

6. A duct structure of a dishwasher according to claim 5, wherein: The adjusting assembly (801) includes a first adjusting unit (802) and a second adjusting unit (803); The first adjusting unit (802) is disposed in the exhaust duct (8) to connect or disconnect the exhaust duct (8) from the accommodation chamber (1); The second adjusting unit (803) is connected to the first adjusting unit (802) to provide power for the first adjusting unit (802) to connect or disconnect the exhaust duct (8) from the accommodation chamber (1).

7. A duct structure of a dishwasher according to claim 6, wherein: The fan unit (201) is a cross-flow fan disposed in the air inlet channel (2).

8. A duct structure of a dishwasher according to claim 6, wherein: A slideway is provided in the exhaust duct (8); The first adjusting unit (802) is disposed in the slideway and moves linearly under the action of the second adjusting unit (803), thereby connecting or disconnecting the exhaust duct (8) from the accommodation chamber (1).

9. A duct structure of a dishwasher according to claim 8, wherein: The area of the exhaust duct (8) blocked by the first adjusting unit (802) is S1; The area of the exhaust duct (8) is S2; The ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

10. A duct structure of a dishwasher according to claim 6, wherein: The first adjusting unit (802) is connected to the second adjusting unit (803) by a rotating shaft (804); The first adjusting unit (802) rotates in the exhaust duct (8) under the action of the second adjusting unit (803), thereby connecting or disconnecting the exhaust duct (8) from the accommodation chamber (1).

11. A duct structure of a dishwasher according to claim 10, wherein: The rotating shaft (804) is disposed at a position near one end face of the first adjusting unit (802) or at the rotation center.

12. A duct structure of a dishwasher according to claim 11, wherein: The area of the exhaust duct (8) blocked by the first adjusting unit (802) is S1; The area of the exhaust duct (8) is S2; The ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

13. A duct structure of a dishwasher according to claim 1, wherein: The steam generating assembly (9) includes a first connecting pipe (901), a second connecting pipe (902), a third connecting pipe (903), a power unit (904), and a heating unit (906); The first connecting pipe (901) communicates with the power unit (904); The third connecting pipe (903) communicates with the heating unit (906); 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 unit (904) and the heating unit (906).

14. A duct structure of a dishwasher according to claim 13, wherein: The water in the accommodation chamber (1), under the action of the power unit (904), enters the power unit (904) after passing through the first connecting pipe (901); After the water is pressurized in the power unit (904), it enters the heating unit (906) through the second connecting pipe (902), and under the action of the heating unit (906), it is heated to boiling to form high-temperature water vapor; The high-temperature water vapor enters the accommodation chamber (1) through the third connecting pipe (903), realizing steam washing of the articles to be washed in the accommodation chamber (1).

15. A duct structure of a dishwasher according to claim 14, wherein: The temperature of the high-temperature water vapor is 100 °C.

16. A duct structure of a dishwasher according to claim 13, wherein: The first connecting pipe (901) and the third connecting pipe (903) are flexible hoses.

17. A duct structure of a dishwasher according to claim 16, wherein: The third connecting pipe (903) is a high-temperature resistant flexible hose.

18. A duct structure of a dishwasher according to claim 17, wherein: It further includes a sink configured to accommodate the articles to be washed; The space in the sink for accommodating the articles to be washed forms the accommodation chamber (1).

19. A duct structure of a dishwasher according to claim 2, wherein: The air inlet (401) is communicated with the air guiding channel (3); The air outlet (402) is communicated with the accommodation chamber (1).

20. A duct structure of a dishwasher according to claim 19, wherein: The air outlet channel (4) forms an air flow area that gradually increases from the air inlet (401) to the air outlet (402) side.

21. A duct structure of a dishwasher according to claim 20, wherein: The anti-backflow structure includes a grille (406) provided at the air outlet (402); A plurality of grille blades (407) are spaced apart on the grille (406).

22. A duct structure of a dishwasher according to claim 21, wherein: The grille blade (407) can rotate about an axis, thereby adjusting the air outlet angle of the grille blade (407).

23. A duct structure of a dishwasher according to claim 22, wherein: At least two of the grille blades (407) rotate at different angles and directions about the axis; The water or steam in the accommodation chamber (1) is at least partially blocked outside the air outlet channel (4) under the action of the grille blades (407) with different angles and directions.

24. A duct structure of a dishwasher according to claim 23, wherein: The grille (406) is detachably connected to the air outlet (402).

25. A duct structure of a dishwasher according to claim 24, wherein: Claws are provided on the periphery of the grille (406); Slots are provided on the air outlet (402) corresponding to the claws; The claws cooperate with the slots to realize the disassembly of the grille (406) and the air outlet (402).

26. A duct structure of a dishwasher according to claim 2 or 19, wherein: The anti-backflow structure includes a switch part (408) arranged in the air outlet passage (4) and capable of opening or closing the air outlet passage (4).

27. A duct structure of a dishwasher according to claim 26, wherein: The switch part (408) opens or closes the air outlet passage (4) at least along the direction of air flow in the air outlet passage (4).

28. A duct structure of a dishwasher according to claim 27, wherein: 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).

29. A duct structure of a dishwasher according to claim 28, wherein: At least the outer edge of the switch part (408) is wrapped with an elastic sealing structure; 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).

30. A duct structure of a dishwasher according to claim 1, wherein: The anti-backflow structure includes a water retaining rib (409) arranged on the first bottom surface (403); The water retaining rib (409) is arranged perpendicular to the flow direction of water or steam in the air outlet passage (4).

31. A duct structure of a dishwasher according to claim 2, wherein: The anti-backflow structure further includes a water storage tank (301) arranged at the bottom of the air guiding passage (3).

32. A duct structure of a dishwasher according to claim 31, wherein: A structure for guiding the water or steam flowing back from the air outlet passage (4) to the water storage tank (301) is formed on the inner wall of the air guiding passage (3).

33. A duct structure of a dishwasher according to claim 32, wherein: A drain port is provided at the lowest end of the water storage tank (301).

34. A duct structure of a dishwasher according to claim 33, wherein: The drain port is opened and closed by a plug body that is pulled or rotated.

35. A duct structure of a dishwasher according to claim 34, wherein: The pulling or rotation of the plug body is realized manually or electrically.

36. A duct structure of a dishwasher according to claim 35, wherein: The side wall of the air outlet passage (4) is arranged in an arc shape.

37. The air duct structure of a dishwasher according to claim 36, wherein: The arc-shaped side wall of the air outlet channel (4) is at least partially in a C-shaped structure.

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