Air duct structure of a dishwasher

Abstract

The present invention discloses an air duct structure of a dishwasher, which includes an air inlet passage, an air guiding passage, and an air outlet passage that are connected in sequence and communicate with the accommodation chamber of the dishwasher; the air inlet passage is externally connected with a fan unit and a heating unit; the heating unit is used to heat the air flow generated by the fan unit to form dry hot air flowing into the accommodation chamber through the air inlet passage; the air guiding passage is at least partially attached to the outer wall of the accommodation chamber; the air outlet passage is at least partially attached to the top wall of the accommodation chamber and communicates with the accommodation chamber at least; an anti-backflow structure is provided in the air duct to prevent water or steam from flowing back along the air duct from the accommodation chamber. The present invention provides an air duct structure of a dishwasher. By setting an air duct with a changing air flow area, the air flow can quickly enter the accommodation chamber through the air duct; 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.

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 prior art discloses a technical solution for the exhaust of a dishwasher, there are still 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, 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, etc.

[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 airflow cross-sectional area in the air duct, it realizes that the airflow quickly enters 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 airflow becomes a uniform airflow. The uniform airflow is evenly dispersed into the accommodation chamber after passing through different grilles at the air outlet of the air duct. In addition, 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; furthermore, by using a cross-flow fan, the air volume is increased, the noise is reduced, and the user experience is improved; and by adding a PTC heater in the air duct to heat the airflow passing through the air duct, rapid drying of the internal environment of the washing machine is achieved. At the same time, by setting the installation position 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.

[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 the above problems 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 externally connected with a fan unit and a heating unit;

[0012] The heating unit is used to heat the airflow generated by the fan unit to form dry hot air flowing into the accommodation chamber through the air inlet channel;

[0013] The air guiding channel is at least partially attached to the outer wall of the accommodation chamber;

[0014] The air outlet channel is at least partially attached to the top wall of the accommodation chamber and at least communicates with the accommodation chamber;

[0015] An anti-backflow structure is provided in the air duct to prevent water or steam from flowing back along the air duct from the accommodation chamber.

[0016] Among them, the heating unit is arranged in the area formed by the air inlet direction of the fan unit and the inside of the air inlet passage. By adding a heating unit in the air duct, the air flow passing through the air duct is heated to quickly dry the internal environment of the washing machine.

[0017] In one embodiment, the fan unit is a cross-flow fan arranged in the air inlet passage. By arranging a cross-flow fan in the air inlet passage, 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.

[0018] Furthermore, the heating area formed by the heating unit in the air inlet passage at least covers the area where the fan unit blows air. By setting the installation position of the heating unit, the heating effect area of the heating unit is increased, and the air resistance can also be reduced, reducing the air volume loss of the air passing through the heating unit.

[0019] In one embodiment, it further includes a conversion part, which is connected to the air inlet passage and the heating unit.

[0020] The heating unit is arranged in the conversion part.

[0021] In one embodiment, the conversion part and the air inlet passage are sealed by sealant.

[0022] In one embodiment, the heating unit is a PTC heater arranged in the air inlet passage.

[0023] In addition, the air outlet passage includes an air inlet and an air outlet.

[0024] The air inlet is communicated with the air guiding passage.

[0025] The air outlet is communicated with the accommodation chamber.

[0026] In one embodiment, the air flow area formed by the air outlet passage from the air inlet to the air outlet side gradually increases. The continuous increase of the flow area from the air inlet to the air outlet is beneficial to the deceleration of the air flow, facilitating the air guiding plate and the air outlet passage to guide the air flow passing through, so that the air flow with a disordered flow area becomes an air flow with a stable and uniform flow area.

[0027] Furthermore, the anti-backflow structure includes a grille arranged at the air outlet of the air outlet passage.

[0028] A number of grid pieces are arranged at intervals on the grille.

[0029] In one embodiment, the louvers are capable of rotating about an axis, thereby adjusting the air outlet angle of the louvers. The adjustment of different angles meets the customer's need for washing at different angles. A grille with adjustable orientation is provided at the air duct outlet. Further, during the adjustment process, the grille will at least face two different directions. This ensures a uniform air flow effect when the air flows through the air duct into the accommodation chamber. At the same time, it realizes the primary blockage 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.

[0030] In one embodiment, at least two of the louvers rotate about the axis at different angles and in different directions.

[0031] The water or steam in the accommodation chamber is at least partially blocked outside the air outlet channel under the action of the louvers with different angles and directions. A grille with adjustable orientation is provided at the air duct outlet. Further, during the adjustment process, the grille will at least face two different directions, realizing the primary blockage 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.

[0032] Furthermore, the grille is detachably connected to the air outlet.

[0033] In one embodiment, clamping claws are provided on the periphery of the grille.

[0034] The air outlet is provided with clamping grooves corresponding to the clamping claws.

[0035] The cooperation between the clamping claws and the clamping grooves realizes the disassembly of the grille from the air outlet, facilitating the user to clean and maintain the grille.

[0036] At the same time, the anti-backflow structure includes a switch part disposed in the air outlet channel and capable of opening or closing the air outlet channel. The switch part realizes the closure of the air outlet channel, ensuring the isolation between the air outlet channel and the dishwasher accommodation chamber, and avoiding the backflow of water or steam during the washing or steam drying process.

[0037] In one embodiment, the switch part opens or closes the air outlet channel at least along the direction of the air flow in the air outlet channel.

[0038] In one embodiment, the switch part is connected to a driving device.

[0039] After receiving the signal to open or close, the driving device drives the switch part to open or close the air outlet channel.

[0040] In one embodiment, at least the outer edge of the switch part is wrapped with an elastic sealing structure, and the sealing structure ensures the sealing effect of the air outlet channel when the switch part is in the closed state.

[0041] When the switch part is closed, the sealing structure cooperates with the inner wall of the air outlet channel to seal the air outlet channel by the switch part.

[0042] Furthermore, the anti-backflow structure includes a first bottom surface and a second bottom surface disposed on the bottom wall of the air outlet channel;

[0043] The air inlet is provided on the first bottom surface;

[0044] The air outlet is provided on the second bottom surface;

[0045] 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 causes a change in the flow trajectory of the water or steam flowing back from the accommodation chamber, reducing the fluidity of the water or steam;

[0046] 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;

[0047] In one embodiment, the anti-backflow structure includes a water retaining rib disposed on the first bottom surface;

[0048] The water retaining rib is disposed 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.

[0049] Moreover, the anti-backflow structure further includes a water storage tank disposed at the bottom of the air guiding channel, and the water storage tank causes the residual water in the air duct to be concentrated and stored in one place;

[0050] 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 the residual steam can be liquefied on the inner wall of the air duct and then be guided to the water storage tank;

[0051] In one embodiment, a drain port is provided at the lowest end of the water storage tank, preventing the water or steam in the accommodation chamber from flowing back along the air duct, resulting in long-term residue of the washing water in the air duct, causing corrosion and deterioration;

[0052] In one embodiment, the drain port is opened and closed by a plug body that can be pulled or rotated;

[0053] In one embodiment, the pulling or rotation of the plug body is achieved manually or electrically.

[0054] Moreover, at the joints of the air inlet channel and the air extraction channel, and the air extraction channel and the air outlet channel, arc-shaped transition structures are provided;

[0055] The arc-shaped transition structures form a tendency to introduce the airflow generated by the fan unit from the air inlet channel into the air extraction channel and the air outlet channel. At the air duct exchange, that is, at the place where the cross-sectional area of the airflow domain in the air duct changes, arc-shaped transition structures are provided, so that the flowing airflow can be guided by the arc-shaped transition structures to change the flow direction, avoiding the hard contact between the airflow direction and the inner wall of the air duct. While passing through quickly, the loss of air volume is greatly reduced;

[0056] In one embodiment, the air duct formed by the air extraction channel on the outer wall of the accommodation chamber is of a linear structure that facilitates the passage of airflow. The linear air duct structure facilitates the rapid passage of airflow and avoids the loss of air volume caused by air ducts with excessive arcs or corners;

[0057] In one embodiment, the cross-sectional area of the airflow domain in the air extraction channel is smaller than the cross-sectional area of the airflow domain in the air inlet channel. The area difference between the airflow domains of the two air ducts is conducive to the acceleration of the airflow during the flow process. When the airflow 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 it quickly passes through the air duct with a small cross-sectional area, thereby improving the transfer efficiency of the airflow in the air duct and avoiding the loss of air volume;

[0058] 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 airflow;

[0059] In one embodiment, at least part of the arc-shaped side wall of the air outlet channel is of 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 avoided that during the operation of the dishwasher, water or steam flows back along the air duct, causing damage or corrosion to the cross-flow fan.

[0060] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art:

[0061] 1. The present invention realizes the rapid passage of airflow 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 cross-sectional area of the airflow domain in the air duct;

[0062] 2. By setting an anti-backflow structure in the air duct, it is avoided that water or steam in the accommodation chamber flows back along the air duct, causing damage to the fan unit or remaining in the air duct to cause corrosion and mildew;

[0063] 3. At the air duct exchange, that is, at the place where the cross-sectional area of the air flow in the air duct changes, an arc-shaped transition structure is provided, so that the flowing air can change its flow 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 through quickly, the loss of air volume is greatly reduced;

[0064] 4. By changing the cross-sectional area of the air duct in the air duct and setting two planes with different heights at the air outlet, a multiple superposition and anti-backflow effect of the flowing water or steam is formed, further avoiding the backflow of water or steam in the accommodation chamber along the air duct, which may cause damage to the fan unit, or remain in the air duct and cause corrosion and mildew;

[0065] 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;

[0066] 6. By setting the shape of the air duct at the top of the accommodation chamber 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;

[0067] 7. By providing a cross-flow fan in the air inlet channel, 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 surrounding environment of the dishwasher and providing a more comfortable environment for users;

[0068] 8. By adding a PTC heater in the air duct to heat the air flow passing through the air duct, the rapid drying of the internal environment of the washing machine is realized. At the same time, by setting the installation position of the PTC heater, the PTC heating area is increased, the wind resistance can be reduced, and the air volume loss of the air passing through the PTC can be reduced.

[0069] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions 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.

[0071] In the accompanying drawings:

[0072] Figure 1 is the first schematic diagram of the overall assembly of the air duct structure of the dishwasher of the present invention;

[0073] Figure 2 It is the second schematic diagram of the overall assembly of the air duct structure of the dishwasher of the present invention;

[0074] Figure 3 It is the first schematic diagram of the air duct structure of the present invention;

[0075] Figure 4 It is the second schematic diagram of the air duct structure of the present invention;

[0076] Figure 5 It is the schematic diagram of the fan unit of the present invention;

[0077] Figure 6 It is the first schematic diagram of the air outlet channel of the present invention;

[0078] Figure 7 It is the second schematic diagram of the air outlet channel of the present invention;

[0079] Figure 8 It is the third schematic diagram of the air outlet channel of the present invention;

[0080] Figure 9 It is the fourth schematic diagram of the air outlet channel of the present invention;

[0081] Figure 10 It is the schematic diagram of the exhaust air channel of the present invention;

[0082] Figure 11 It is the first schematic diagram of the adjustment component channel of the present invention;

[0083] Figure 12 It is the second schematic diagram of the adjustment component channel of the present invention;

[0084] Figure 13 It is the schematic diagram of the steam generation component of the present invention;

[0085] Figure 14 It is the schematic diagram of the usage process logic of the steam generation component of the present invention.

[0086] 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. Guide 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.

[0087] 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 rather to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0088] 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 in conjunction with the 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.

[0089] 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. 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.

[0090] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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.

[0091] 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 cavity 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, which has a cumbersome structure and wastes resources. In view of the above technical problems, the present invention develops the following technical solutions.

[0092] 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. 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.

[0093] 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 that 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, the complete sealing and fixing of the two are realized. The connection between the swivel member and the air fan unit 201 is achieved 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 through quickly, the loss of air volume is greatly reduced. And, at the air guiding passage 3, there is also a water storage tank 301. 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.

[0094] Figures 6 to 9These are the first, second, third, and fourth schematic diagrams of the air outlet passage 4 of the present invention. As can be seen from the attached 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 side wall of the air outlet passage 4, which not only guides the air flow inside the air outlet passage 4 but also prevents the backflow of water or steam in the accommodation chamber 1. Under the action of the arc 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, the water or steam in the accommodation chamber 1 is effectively blocked outside the drainage air duct, preventing the water or steam from 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 arranged at intervals 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 in different 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.

[0095] Figures 10 to 12 These are the schematic diagram of the exhaust air passage 8 of the present invention and the first and second schematic diagrams 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 area of the air outlet 402 can be adjusted, which can not only ensure the temperature during the dishwashing process of the dishwasher, save energy, but also reduce the risk of water being discharged from the exhaust air duct to the outside during washing. During the drying stage, the mechanism can be used to open the air outlet, accelerate the discharge of air, and quickly dry. 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 only a rectangular exhaust air passage 8 is shown 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.

[0096] 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 cleaned, and the problem of separately introducing water is avoided; by converting the water in the accommodation chamber 1 into high-temperature water vapor, the temperature of the chamber is rapidly increased in a short time, which effectively plays the role of sterilization and removing stains on the tableware.

[0097] Figure 14 This is a schematic diagram of the process logic of using the steam generation component 9 of the present invention. During Figure 14 the pre-washing process of step S2 described above, 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, a high-temperature water vapor is generated by using the steam generator component communicated with the accommodation chamber 1 and is transported 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.

[0098] 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.

[0099] Embodiment 1

[0100] 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.

[0101] The present invention realizes that air flows rapidly through the air duct into the accommodation chamber 1 with small air volume loss by providing an air duct structure that fits the accommodation chamber of the dishwasher and has a changing air flow area in the air duct. By arranging a flow guiding structure in the air duct, the disordered 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 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.

[0102] Embodiment 2

[0103] 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 is at least in communication 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.

[0104] Embodiment 3

[0105] 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 quickly dry 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.

[0106] Embodiment 4

[0107] As Figures 3 to 5As shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 to Embodiment 3. At the connection between the air inlet channel 2 and the air guiding channel 3, and between 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 trend 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. At the air duct exchange, that is, at the change of the air flow area in the air duct, 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 channel 3 on the outer wall of the accommodation chamber 1 is in a straight-line structure that facilitates the passage of air flow. 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 too many arcs or corners; the cross-sectional area of the air flow area in the air guiding channel 3 is smaller than the cross-sectional area of the air flow area in the air inlet channel 2. The area difference between the two air duct air flow areas is conducive to the acceleration of the air flow during the flow process. When the air flow enters the air duct with a small area from the air duct with a large area, it obtains a higher transfer speed and quickly passes through the air duct with a small area, thereby improving the transfer efficiency of the air flow in the air duct and avoiding the loss of air volume.

[0108] Embodiment Five

[0109] 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 channel 4 of this embodiment includes an air inlet 401 and an air outlet 402; the air inlet 401 is communicated with the air guiding channel 3; the air outlet 402 is communicated with the accommodation chamber 1. The air flow generated by the fan unit 201 enters the air outlet channel 4 from the air inlet 401 after passing through the air inlet channel 2 and the air guiding channel 3. Under the guiding action of the guiding structure such as the guiding plate 405 in the air outlet channel 4, the air flow with a disordered flow direction is changed into an air flow with a uniform flow direction, and finally enters the accommodation chamber 1 from the air outlet 402.

[0110] Embodiment Six

[0111] As Figures 6 to 9 shown in the figure, this embodiment is a further limitation of the above-mentioned Embodiment Five. The air flow area formed by the air outlet channel 4 from the air inlet 401 to the air outlet 402 side gradually increases. As the air flow area from the air inlet 401 to the air outlet 402 continuously increases, when the air flow passes through this area, the rapid flow in the diversion channel becomes slow as the area expands, which is conducive to the deceleration of the air flow and facilitates the guiding of the air flow passing through by the guiding plate 405 and the air outlet channel 4, so that the air flow with a disordered area becomes an air flow with a stable and uniform area.

[0112] Embodiment Seven

[0113] 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 movement 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.

[0114] Embodiment Eight

[0115] 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, 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 flow 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 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.

[0116] 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 of the flowing water or steam and the effect of preventing backflow, 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.

[0117] Embodiment Nine

[0118] As shown Figures 6 to 9As shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 to Embodiment 8. The side wall of the air outlet channel 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 channel 4 is in a C-shaped structure. By setting the air duct shape at the top of the accommodation chamber 1 to an arc-shaped structure 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.

[0119] Embodiment Ten

[0120] As Figures 6 to 9 shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 to Embodiment 9. The diversion structure in this embodiment includes a plurality of guide plates 405 spaced apart on the bottom wall of the air outlet channel 4. The guide plates 405 divert the disordered air flow in the flowing area into a smooth and uniform air flow in the area; the guide plates 405 divert the air flow flowing through the air outlet channel 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 channel 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, so that the air flow passes through the guide plates 405 and changes from a disordered air flow to a uniformly flowing air flow; at least part of the guide plates 405 is arranged on the first bottom surface 403.

[0121] Embodiment Eleven

[0122] As Figures 6 to 9 shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 to Embodiment 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 channel 4, and the water retaining rib 409 further blocks the water or steam flowing in the air outlet channel 4.

[0123] From Figures 6 to 9 it can be seen that at the air outlet 402 of the air outlet channel 4, a grille 406 is also provided. A plurality of grille sheets 407 are spaced apart on the grille 406; the grille sheets 407 can rotate around an axis, and at least two grille sheets 407 rotate at different angles and directions around the axis, thereby adjusting the air outlet angle of the grille sheets 407;

[0124] 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;

[0125] 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.

[0126] Embodiment Twelve

[0127] As Figures 3 to 9 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiments One to Eleven. For the air duct structure of a dishwasher 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.

[0128] 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.

[0129] Embodiment Thirteen

[0130] As Figures 3 to 9As shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 to Embodiment 12. The anti-backflow structure in this embodiment includes a switch part 408 disposed in the air outlet passage 4 and capable of opening or closing the air outlet passage 4; 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; further, the switch part 408 is connected to a driving device; after receiving a 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 a 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.

[0131] Embodiment Fourteen

[0132] As Figure 4 shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 to Embodiment 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 is liquefied 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 are realized by a plug body that can be pulled or rotated; the pulling or rotation of the plug body is realized manually or electrically.

[0133] Embodiment Fifteen

[0134] As Figures 10 to 12As shown in the figure, this embodiment further defines any one of the above-described Embodiments 1 to 14. A duct structure of a dishwasher in this embodiment further includes an exhaust passage 8 communicating with the accommodation chamber 1, and 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.

[0135] Embodiment Sixteen

[0136] As Figures 10 to 12 shown in the figure, this embodiment further defines the above-described Embodiment 15. 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 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.

[0137] Embodiment Seventeen

[0138] As Figures 10 to 12 shown in the figure, this embodiment further defines the above-described 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; the area of the exhaust passage 8 is S2; the ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

[0139] The operation model of the adjustment mechanism and the shape of the exhaust air passage 8 are set, enhancing 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.

[0140] Embodiment XVIII

[0141] 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 performs a rotational motion within the exhaust air passage 8, thereby realizing the connection or disconnection between the exhaust air passage 8 and the accommodation chamber 1; the rotating shaft 804 is disposed at a position near one end face of the first adjustment unit 802 or at the rotation center; the area of the exhaust air passage 8 blocked by the first adjustment unit 802 is S1; the area of the exhaust air passage 8 is S2; the ratio of S1 to S2 is 0 < S1 / S2 ≤ 1.

[0142] The operation model of the adjustment mechanism and the shape of the exhaust air passage 8 are set, enhancing 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.

[0143] Embodiment XIX

[0144] 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 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.

[0145] Among them, 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 providing the steam generation assembly 9 communicated with the accommodation chamber 1 in the present invention, steam is generated using the water in the accommodation chamber 1, and the tableware is washed by generating steam, and the problem of separately introducing water is avoided.

[0146] Further, 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; the water is pressurized in the power unit 904 and then enters the heating unit 905 through the second connecting pipe 902, and under the action of the heating unit 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 can be rapidly increased within a short time, effectively playing the role of sterilization and removing stains on tableware.

[0147] 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.

[0148] Embodiment Twenty

[0149] 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 sink configured to accommodate articles to be washed; the space in the sink for accommodating articles to be washed forms the accommodation chamber 1.

[0150] Embodiment Twenty - One

[0151] 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 generation assembly 9 in this embodiment includes the following steps:

[0152] S1. Startup process, turn on the startup power supply;

[0153] S2. Pre - washing process, perform a 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 a drainage operation;

[0154] S3. Rinsing process, perform a water inlet operation on the dishwasher and conduct rinsing. After the articles to be washed in the accommodation chamber 11 are rinsed, perform a drainage operation;

[0155] S4. Drying process, perform a drying operation on the dishwasher.

[0156] Embodiment Twenty - Two

[0157] 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.

[0158] Embodiment 23

[0159] 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.

[0160] Embodiment 24

[0161] 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.

[0162] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0163] Similarly, it should be understood that in order to streamline this disclosure and help understand one or more of the various aspects of the invention, 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 those expressly recited in each claim. Rather, as reflected in the following claims, the aspects of the invention 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 the detailed description, where each claim stands on its own as a separate embodiment of the present invention.

[0164] 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.

[0165] 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.

[0166] It should be noted that the above embodiments are illustrative of the invention and not restrictive of the invention, and alternative embodiments can 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 listing 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.

[0167] The above are only the preferred embodiments of the present invention and do not impose any formal limitations on the present invention. 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, can make some changes or modifications to the above-mentioned technical content by using the disclosed technical content to form equivalent embodiments with equivalent changes. 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 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: including 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 externally connected with a fan unit (201) and a heating unit (202); the heating unit (202) is configured 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); at least a part of the air guiding channel (3) is attached to the outer wall of the accommodation chamber (1); at least a part of the air outlet channel (4) is attached to the top wall of the accommodation chamber (1) and communicates with at least the accommodation chamber (1); an anti-backflow structure is provided in the air duct to prevent water or steam from flowing back along the air duct from the accommodation chamber (1); the air outlet channel (4) includes an air inlet (401) and an air outlet (402); the anti-backflow structure includes a grille (406) provided at the air outlet (402) of the air outlet channel (4); a plurality of grille plates (407) are spaced apart on the grille (406); the grille plates (407) can rotate about an axis, and at least two of the grille plates (407) rotate at different angles and in different directions; at least part of the water or steam in the accommodation chamber (1) is blocked outside the air outlet channel (4) under the action of the grille plates (407) with different angles and directions; a guiding plate (405) is provided in the air outlet channel (4) to guide the air flow in the air outlet channel (4).

2. The air duct structure of a dishwasher according to claim 1, wherein: the heating unit (202) is disposed in the region formed by the air inlet direction of the fan unit (201) and the inside of the air inlet channel (2).

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

4. The air duct structure of a dishwasher according to claim 2, wherein: the heating area formed by the heating unit (202) in the air inlet channel (2) at least covers the air delivery area of the fan unit (201).

5. The air duct structure of a dishwasher according to claim 4, wherein: it further includes a conversion member (10) connected to the air inlet channel (2) and the heating unit (202); the heating unit (202) is disposed in the conversion member (10).

6. The air duct structure of a dishwasher according to claim 5, wherein: the conversion member (10) and the air inlet channel (2) are sealed by sealant.

7. The air duct structure of a dishwasher according to claim 6, wherein: the heating unit (202) is a PTC heater disposed in the air inlet channel (2).

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

9. A duct structure of a dishwasher according to claim 8, characterized in that: The air outlet passage (4) forms a gradually increasing air flow area from the air inlet (401) to the air outlet (402).

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

11. A duct structure of a dishwasher according to claim 10, characterized in that: Claw fingers are provided on the periphery of the grille (406); The air outlet (402) is provided with a card slot corresponding to the claw fingers; The claw fingers cooperate with the card slot to realize the disassembly of the grille (406) and the air outlet (402).

12. A duct structure of a dishwasher according to any one of claims 4-11, characterized in that: 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 passage (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).

13. A duct structure of a dishwasher according to claim 12, characterized in that: A height difference forming the anti-backflow structure is provided between the first bottom surface (403) and the second bottom surface (404).

14. A duct structure of a dishwasher according to claim 13, 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).

15. A duct structure of a dishwasher according to claim 14, characterized in that: The anti-backflow structure includes a water retaining rib (409) provided 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).

16. A duct structure of a dishwasher according to claim 1, characterized in that: The anti-backflow structure includes a switch part (408) provided in the air outlet passage (4) and capable of opening or closing the air outlet passage (4).

17. A duct structure of a dishwasher according to claim 16, characterized in that: The switch part (408) opens or closes the air outlet passage (4) at least along the flow direction of the air flow in the air outlet passage (4).

18. A duct structure of a dishwasher according to claim 17, characterized in that: The switch part (408) is connected with a driving device; After receiving the signal of opening or closing, the driving device drives the switch part (408) to realize the opening or closing of the air outlet passage (4).

19. A duct structure of a dishwasher according to claim 18, characterized in that: 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).

20. The air duct structure of a dishwasher according to claim 1, characterized in that: The anti-backflow structure further includes a water storage tank (301) provided at the bottom of the air guiding passage (3).

21. The air duct structure of a dishwasher according to claim 20, characterized in that: 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).

22. The air duct structure of a dishwasher according to claim 21, characterized in that: A drain port is provided at the lowest end of the water storage tank (301).

23. The air duct structure of a dishwasher according to claim 22, characterized in that: The drain port is opened and closed by a plug body that is pulled or rotated.

24. The air duct structure of a dishwasher according to claim 23, characterized in that: The pulling or rotation of the plug body is realized manually or electrically.

25. The air duct structure of a dishwasher according to claim 1, characterized in that: At the joints of the air inlet passage (2) and the air guiding passage (3), and 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 tendency 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).

26. The air duct structure of a dishwasher according to claim 25, characterized in that: The air duct formed by the air guiding passage (3) on the outer wall of the accommodation chamber (1) is in a linear structure that facilitates the passage of air flow.

27. The air duct structure of a dishwasher according to claim 26, characterized in that: 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).

28. The air duct structure of a dishwasher according to claim 27, characterized in that: The side wall of the air outlet passage (4) is arc-shaped.

29. The air duct structure of a dishwasher according to claim 28, characterized in that: At least part of the arc-shaped side wall of the air outlet passage (4) is in a C-shaped structure.

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