Air duct structure of a dishwasher

Abstract

The present invention discloses an air duct structure of a dishwasher, comprising an air inlet channel, an air induced channel and an air outlet channel which are connected to a storage chamber of the dishwasher and are connected in sequence; the air inlet channel is provided with a fan unit; the air induced channel is at least partially in contact with the outer wall of the storage chamber; the air outlet channel is at least partially in contact with the top wall of the storage chamber and is connected to the storage chamber; a steam generating assembly is connected to the storage chamber, and uses water in the storage chamber to generate steam, and transports it back to the storage chamber, thereby achieving steam washing of items to be washed. The present invention provides an air duct structure of a dishwasher, which realizes that the airflow quickly passes through the air duct into the storage chamber by providing an air duct structure with a changing airflow flow field in the air duct; in addition, a steam generating assembly connected to the storage chamber is also provided, and steam is generated by introducing water in the storage chamber into the steam generator, thereby finally achieving washing of tableware.

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 dishwasher exhaust, it still has the disadvantages of small air volume and high noise of the drying fan; at the same time, the tableware residues are not cleaned thoroughly and steam washing can only achieve the cleaning of the tableware, which can only play a partial sterilization role and cannot achieve large-scale sterilization; at the same time, high-pressure water cannot effectively clean tableware with high viscosity or that has been left for a long time without being washed, and steam washing usually has a separate water inlet pipeline, which is cumbersome in structure and wastes resources.

[0006] Therefore, it is necessary to improve the shortcomings and defects of the prior art and provide an air duct structure for a dishwasher. By setting an air duct structure that fits the dishwasher receiving chamber and changes the airflow basin area in the air duct, the airflow can quickly pass through the air duct into the receiving chamber with little air volume loss. At the same time, a structure is set in the air duct to prevent water or steam in the receiving chamber from flowing back along the air duct, thereby ensuring the service life of the entire device and preventing mold. In addition, by adopting a cross-flow fan, the air volume is increased, the noise is reduced, and the user experience is improved. In addition, a steam generating component connected to the receiving chamber is provided. By introducing the water in the receiving chamber into the steam generator, steam is generated to achieve cleaning of the tableware. By converting the water in the receiving chamber into high-temperature water vapor, the chamber temperature is rapidly increased in a short time, which effectively plays a role in sterilization and removing stains on the tableware.

[0007] In view of this, the present invention is 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 a dishwasher air duct structure that can overcome the above problems or at least partially solve the above problems.

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: an air duct structure of a dishwasher, comprising

[0010] An air inlet channel, an air inlet channel and an air outlet channel connected in sequence to the receiving chamber of the dishwasher;

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

[0012] The air induction channel is at least partially in contact with the outer wall of the accommodating chamber;

[0013] The air outlet channel is at least partially in contact with the top wall of the accommodating chamber and is in communication with the accommodating chamber;

[0014] The steam generating component is communicated with the accommodating chamber, and utilizes the water in the accommodating chamber to generate steam, and transports the steam back into the accommodating chamber, thereby realizing steam washing of the items to be washed.

[0015] Wherein, the steam generating assembly comprises a first connecting pipe, a second connecting pipe, a third connecting pipe, a power part and a heating part;

[0016] The first connecting pipe is connected to the power unit;

[0017] The third connecting pipe is connected to the heating part;

[0018] The first connecting pipe and the third connecting pipe are respectively connected to the accommodating chamber;

[0019] The second connecting pipe connects the power part and the heating part. The present invention realizes steam generation by utilizing water in the accommodating chamber by setting a steam generating component connected to the accommodating chamber, thereby generating steam to achieve tableware cleaning and avoiding the problem of separate water introduction.

[0020] Furthermore, the water in the containing chamber, under the action of the power unit, passes through the first connecting pipe and enters the power unit;

[0021] After being pressurized in the power unit, the water enters the heating unit through the second connecting pipe and is heated and boiled to high-temperature steam under the action of the heating unit;

[0022] The high-temperature steam enters the accommodating chamber through the third connecting pipe to achieve steam washing of the items to be washed in the accommodating chamber. By converting the water in the accommodating chamber into high-temperature steam, the chamber temperature is quickly increased in a short time, which effectively sterilizes and removes stains on the tableware.

[0023] In one embodiment, the temperature of the high temperature steam is 100°C.

[0024] Furthermore, the first connecting pipe and the third connecting pipe are hoses;

[0025] In one embodiment, the third connecting pipe is a high temperature resistant hose;

[0026] In one embodiment, it also includes

[0027] a sink configured to hold items to be washed;

[0028] The space in the sink for accommodating items to be washed forms the accommodating chamber.

[0029] In addition, the air outlet channel includes an air inlet and an air outlet;

[0030] The air inlet is in communication with the air induction channel;

[0031] The air outlet is in communication with the accommodating chamber;

[0032] In one embodiment, the air flow basin area formed by the air outlet channel gradually increases from the air inlet to the air outlet side. The continuous increase of the flow basin area from the air inlet to the air outlet is conducive to the deceleration of the air flow, and facilitates the guide plate and the air outlet channel to guide the air flow passing through, so that the turbulent air flow in the flow basin becomes a stable and uniform air flow in the flow basin.

[0033] Furthermore, an anti-backflow structure is provided in the air duct to prevent water or steam from flowing back from the containing chamber along the air duct;

[0034] In one embodiment, the backflow prevention structure includes a grille disposed at the air outlet;

[0035] A plurality of grid sheets are arranged at intervals on the grid;

[0036] In one embodiment, the grille can rotate around an axis to adjust the air outlet angle of the grille. The adjustment of different angles meets the needs of customers for washing at different angles. A grille with adjustable direction is provided at the air outlet of the air duct. Furthermore, the grille will face at least two different directions during the adjustment process, which ensures that the airflow flows evenly in the process of entering the containing chamber through the air duct. At the same time, the water or steam in the containing chamber is initially blocked from entering the air duct, thereby reducing the probability of water or steam flowing back along the air duct.

[0037] In one embodiment, at least two of the grid plates rotate around the axis at different angles and directions;

[0038] The water or steam in the containing chamber is at least partially blocked from the air outlet channel by the grille sheets with different angles and directions. A grille with adjustable direction is provided at the air outlet of the air duct. Furthermore, the grille will face at least two different directions during the adjustment process, thereby achieving the initial shielding of the water or steam in the containing chamber from entering the air duct, and reducing the probability of water or steam flowing back along the air duct.

[0039] In one embodiment, the grille is detachably connected to the air outlet;

[0040] In one embodiment, the periphery of the grille is provided with claws;

[0041] The air outlet is provided with a slot corresponding to the claw;

[0042] The clamping claw cooperates with the clamping slot to realize the disassembly of the grille and the air outlet, which is convenient for users to clean and maintain the grille.

[0043] Furthermore, the anti-backflow structure includes a switch part arranged in the air outlet channel, which can open or close the air outlet channel, and the switch part realizes the closure of the air outlet channel, ensures the isolation of the air outlet channel and the dishwasher receiving chamber, and avoids the backflow of water or steam during washing or steam drying;

[0044] In one embodiment, the switch portion opens or closes the air outlet channel at least along the direction in which the airflow flows in the air outlet channel;

[0045] In one embodiment, the switch portion is connected to a drive device;

[0046] After receiving the opening or closing signal, the driving device drives the switch part to open or close the air outlet channel;

[0047] In one embodiment, at least the outer edge of the switch portion is wrapped with an elastic sealing structure, and the sealing structure ensures the sealing effect of the air outlet channel when the switch portion is in a closed state;

[0048] When the switch part is closed, the sealing structure cooperates with the inner wall of the air outlet channel, so that the switch part seals the air outlet channel.

[0049] Still further, the backflow prevention structure includes a first bottom surface and a second bottom surface arranged on the bottom wall of the air outlet channel;

[0050] The air inlet is arranged on the first bottom surface;

[0051] The air outlet is arranged on the second bottom surface;

[0052] In one embodiment, a height difference forming the backflow prevention structure is provided between the first bottom surface and the second bottom surface, and the height difference changes the flow trajectory of water or steam flowing back from the containing chamber, thereby reducing the fluidity of the water or steam;

[0053] In one embodiment, the distance from the first bottom surface to the top wall of the air outlet channel is smaller than the distance from the second bottom surface to the top wall of the air outlet channel;

[0054] In one embodiment, the backflow prevention structure includes a water retaining rib disposed on the first bottom surface;

[0055] The water retaining rib is arranged perpendicular to the flow direction of 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.

[0056] At the same time, the anti-backflow structure also includes a water storage tank arranged at the bottom of the air induction channel, and the water storage tank allows the residual water along the air duct to be knocked and stored in one place;

[0057] In one embodiment, the inner wall of the air induction channel is formed with a structure for guiding the water or steam returning from the air outlet channel to the water storage tank, so that the residual steam can be guided to the water storage tank after being liquefied on the inner wall of the air duct;

[0058] In one embodiment, a drain port is provided at the lowest end of the water storage tank to prevent the water or steam in the accommodating chamber from flowing back along the air duct, causing the washing water to remain in the air duct for a long time, thereby causing corrosion and deterioration;

[0059] In one embodiment, the drain port is opened and closed by pulling or rotating the plug;

[0060] In one embodiment, the pulling or rotating of the plug body is achieved manually or electrically.

[0061] Furthermore, an arc-shaped transition structure is provided at the connection between the air inlet channel and the air induction channel, and at the connection between the air induction channel and the air outlet channel;

[0062] The arc-shaped transition structure forms a tendency for the airflow generated by the fan unit to be introduced from the air inlet channel into the air inlet channel and the air outlet channel. At the air duct exchange, that is, at the place where the airflow flow area in the air duct changes, an arc-shaped transition structure is provided, so that the airflow passing through can be guided by the arc-shaped transition structure and the flow direction can be changed, thereby avoiding the hard contact between the airflow direction and the inner wall of the air duct. While the airflow passes quickly, the loss of air volume is greatly reduced;

[0063] In one embodiment, the air duct formed by the air induction channel on the outer wall of the accommodating chamber is in a straight structure that facilitates the passage of air. The straight air duct structure facilitates the rapid passage of air and avoids the loss of air volume caused by the air duct with too many arcs or bends.

[0064] In one embodiment, the cross-sectional area of ​​the airflow domain in the air inlet 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 area from the air duct with a large area, it obtains a higher transmission speed and quickly passes through the air duct with a small area, thereby improving the transmission efficiency of the airflow in the air duct and avoiding the loss of air volume.

[0065] In one embodiment, the side wall of the air outlet channel is arranged in an arc shape, and cooperates with the guide plate to form a structure for adjusting the airflow passing through;

[0066] In one embodiment, the arc-shaped side wall of the air outlet channel is at least partially C-shaped. By setting the air duct shape at the top of the accommodating chamber to be approximately C-shaped, water or steam backflows from the air duct during operation of the dishwasher to avoid damage or corrosion to the cross-flow fan.

[0067] In one embodiment, the fan unit is a cross-flow fan arranged in the air inlet channel. By arranging the 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 has low noise during operation, reducing the impact on the surrounding environment of the dishwasher, and providing a more comfortable environment for users.

[0068] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0069] 1. The present invention provides an air duct structure that fits the dishwasher receiving chamber and changes the air flow area in the air duct, so that the air flow quickly passes through the air duct into the receiving chamber with little air volume loss;

[0070] 2. By setting up an anti-backflow structure in the air duct, it is prevented that water or steam in the containment chamber flows back along the air duct, causing damage to the fan unit, or residual corrosion and mildew in the air duct;

[0071] 3. At the duct exchange, that is, at the place where the airflow basin area in the duct changes, an arc-shaped transition structure is set, so that the airflow passing through can change its flow direction under the guidance of the arc-shaped transition structure, avoiding the hard contact between the airflow direction and the inner wall of the duct. While the airflow passes quickly, the loss of air volume is greatly reduced;

[0072] 4. By changing the airflow basin of the duct and setting two planes of different heights at the air outlet, the water or steam flowing through is superimposed multiple times to prevent backflow, which further prevents the water or steam in the containment chamber from flowing back along the duct, causing damage to the fan unit, or corrosion and mildew caused by residue in the duct;

[0073] 5. A grille with adjustable direction is provided at the air outlet of the air duct. Furthermore, the grille will face at least two different directions during adjustment, thereby achieving the initial shielding of water or steam in the receiving chamber from entering the air duct, thereby reducing the probability of water or steam flowing back along the air duct;

[0074] 6. By setting the air duct shape at the top of the accommodating chamber to a nearly "C"-shaped arc structure, it is prevented that water or steam flows back from the air duct during the operation of the dishwasher, causing damage or corrosion to the cross-flow fan;

[0075] 7. By setting 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 has low noise when running, which reduces the impact on the environment around the dishwasher and provides a more comfortable environment for users.

[0076] 8. The present invention realizes steam generation by using water in the accommodating chamber by providing a steam generating assembly connected to the accommodating chamber, thereby generating steam to clean the tableware and avoiding the problem of separate water introduction;

[0077] 9. By converting the water in the holding chamber into high-temperature steam, the temperature of the chamber is quickly increased in a short period of time, which effectively kills bacteria and removes stains on tableware.

[0078] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0080] In the attached picture:

[0081] Figure 1 It is a first schematic diagram of the overall assembly of the air duct structure of the dishwasher of the present invention;

[0082] Figure 2 It is a second schematic diagram of the overall assembly of the air duct structure of the dishwasher of the present invention;

[0083] Figure 3 is a first schematic diagram of the air duct structure of the present invention;

[0084] Figure 4 is a second schematic diagram of the air duct structure of the present invention;

[0085] Figure 5 is a schematic diagram of a fan unit of the present invention;

[0086] Figure 6 is a first schematic diagram of the air outlet channel of the present invention;

[0087] Figure 7 is a second schematic diagram of the air outlet channel of the present invention;

[0088] Figure 8 is a third schematic diagram of the air outlet channel of the present invention;

[0089] Fig. 9 is a fourth schematic diagram of the air outlet channel of the present invention;

[0090] Fig.10 It is a schematic diagram of the exhaust channel of the present invention;

[0091] Fig.11 is a first schematic diagram of the regulating component channel of the present invention;

[0092] Fig.12 is a second schematic diagram of the regulating component channel of the present invention;

[0093] Fig.13 is a schematic diagram of a steam generating assembly of the present invention;

[0094] Fig.14 It is a logical schematic diagram of the use process of the steam generating component of the present invention.

[0095] In the figure: 1. accommodating chamber; 2. air inlet channel; 201. fan unit; 202. heating unit; 3. air induction 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; 408. switch part; 409. water retaining rib; 6. transition structure; 8. exhaust channel; 801. adjustment component; 802. first adjustment unit; 803. second adjustment unit; 804. rotating shaft; 9. steam generating component; 901. first connecting pipe; 902. second connecting pipe; 903. third connecting pipe; 904. power part; 905. heating part; 10. conversion part.

[0096] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0097] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below 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.

[0098] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0099] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0100] There are problems in daily use of dishwashers, such as the drying fan has a small air volume and high noise; the airflow generated by the fan is seriously lost and the transmission efficiency is low during the process of being transported to the accommodating chamber 1; the water or steam in the inner tank of the dishwasher flows back along the air duct, causing corrosion of the fan or until it becomes moldy; at the same time, the tableware residues are not cleaned thoroughly and steam washing can only achieve partial sterilization of the tableware, and cannot achieve large-scale sterilization; at the same time, high-pressure water cannot effectively clean tableware with high viscosity or that has been placed for a long time without being washed, and steam washing usually has a separate water inlet pipeline, which is cumbersome in structure and wastes resources. In view of the above technical problems, the present invention develops the following technical solutions.

[0101] Figure 1 and Figure 2 The first and second schematic diagrams of the overall assembly of the air duct structure of the dishwasher of the present invention mainly show the assembly position relationship between the accommodating chamber 1 and the air duct of the present invention. Figure 1 and Figure 2 It can be seen that the air duct described in the present invention includes an air inlet channel 2, an air induced air channel 3 and an air outlet channel 4. The air inlet channel 2 is externally provided with a fan unit 201. The setting place of the fan unit 201 and the air inlet channel 2 also includes a conversion member 10. The conversion member 10 is installed with a heating unit 202. Of course, during the setting process, according to actual needs, the heating unit 202 and the conversion member 10 can be omitted. It is only an embodiment described in the present invention; further, the air inlet channel 2 is arranged at the bottom of the accommodating chamber 1, the air induced air channel 3 is in close contact with the side wall of the accommodating chamber 1, and the air outlet channel 4 is in close contact with the top of the accommodating chamber 1. At the same time, the air outlet channel 4 is arranged to be an arc structure approximately in the shape of a C. The airflow generated by the fan unit 201 passes through the air inlet channel 2, the air induced air channel 3 and the air outlet channel 4 and then enters the accommodating chamber 1.

[0102] Figures 3 to 5 The first and second schematic diagrams of the air duct structure of the present invention and the schematic diagram of the fan unit 201 are shown in FIG. Figures 3 to 5It can be seen that the air duct includes an air inlet channel 2, an air inlet channel 3, and an air outlet channel 4. At the same time, the fan unit 201 is connected to the conversion member 10 and the air inlet channel 2. The conversion member 10 is provided with a heating unit 202. When the conversion member 10 is connected to the air inlet channel 2, a sealant is injected to achieve complete sealing and fixation of the two. The swivel member and the fan unit 201 are connected by a detachable threaded structure. In addition, in the process of air duct conversion, an arc-shaped transition structure 6 is also provided. At the place where the air duct flow area changes, the transition structure 6 is provided so that the airflow passing through can Under the guidance of the arc-shaped transition structure 6, the flow direction is changed, thereby 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, a water storage tank 301 is also provided at the air induced channel 3, and the inner wall of the air induced channel 3 is formed with a structure for guiding the water or steam refluxed from the air outlet channel 4 to the water storage tank 301. The structure of the inner wall of the air induced channel 3 can be understood as a structure inclined to the water storage tank 301, and the steam attached to the inner wall of the air induced channel 3 is converged into the water storage tank 301 under the action of the inclined inner wall.

[0103] Figures 6 to 9 4 and 5. The figures are the first, second, third and fourth schematic diagrams of the air outlet channel 4 of the present invention. It can be seen from the figures that the air outlet channel 4 is an approximately C-shaped arc structure, and an air inlet 401 connected to the air induction channel 3 and an air outlet 402 connected to the accommodating chamber 1 are arranged in the air outlet channel 4. A water retaining rib 409, a guide plate 405, and a first bottom surface 403 and a second bottom surface 404 with a height difference are also arranged inside the air outlet channel 4; wherein the guide plate 405 is also an arc structure, and has the same curvature as the arc-shaped side wall of the air outlet channel 4, which not only guides the airflow in the air outlet channel 4, but also avoids the backflow of water or steam in the accommodating chamber 1. The water or steam in the accommodating chamber 1 is effectively blocked by the arc-shaped side wall of the air outlet channel 4, the guide plate 405, the height difference between the first bottom surface 403 and the second bottom surface 404, and the water retaining rib 409. It is blocked outside the drainage air duct to prevent 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 channel 4; a plurality of grilles 407 are arranged at intervals on the grille 406; further, the grille 407 can rotate around an axis, and the angles and directions of rotation of at least two of the grilles 407 around the axis are different, thereby adjusting the air outlet angle of the grille 407; further, the grille 406 and the air outlet 402 are detachably connected, and a claw is provided on the periphery of the grille 406, and a slot is provided on the air outlet 402 corresponding to the claw; the claw cooperates with the slot to realize the disassembly of the grille 406 and the air outlet 402, which is convenient for users to clean and maintain the grille 406.

[0104] Figures 10 to 12Schematic diagram of the exhaust passage 8 of the present invention and the first and second schematic diagrams of the adjustment component 801 channel. It can be seen from the figure that the present invention is provided with an adjustment component 801 on the exhaust passage 8 that can connect or disconnect the exhaust passage 8. By providing an adjustment mechanism that can adjust the size of the exhaust port in the exhaust passage 8, the size of the air outlet 402 area can be adjusted, which can ensure the temperature of the dishwasher during washing and save energy, and reduce the risk of water being discharged to the outside from the exhaust passage during washing; in the drying stage, the air port can be opened through the mechanism to speed up the discharge of wind and dry quickly; at the same time, the adjustment component 801 of the present invention adopts two technical solutions, which can be moved horizontally and flipped and rotated, and the shape of the exhaust passage 8 can be changed in many ways. Although in Fig.11 and Fig.12 There is only a rectangular exhaust passage 8, but it can be adjusted according to actual conditions and needs. The setting of the operation model of the adjustment mechanism and the shape of the exhaust passage 8 aims to enhance the adaptability of the adjustment mechanism and the adaptability of exhaust passages 8 of different dishwasher models and different shapes. At the same time, the adjustment of the exhaust passage 8 by the adjustment mechanism can meet the needs of different gears of exhaust and different drying conditions.

[0105] Fig.13 It is a schematic diagram of the steam generating assembly 9 of the present invention. It can be seen from the figure that the accommodating chamber 1 is connected to the steam generating assembly 9. By setting up the steam generating assembly 9 connected to the accommodating chamber 1, it is realized to utilize the water in the accommodating chamber 1 to generate steam, so as to achieve the cleaning of tableware and avoid the problem of separate water introduction; by converting the water in the accommodating chamber 1 into high-temperature water vapor, the chamber temperature is quickly increased in a short time, which effectively plays a role in sterilization and removing stains on the tableware.

[0106] Fig.14 The steam generating assembly 9 of the present invention is a schematic diagram of the use process logic. Fig.14 In the pre-wash process of step S2 described in the above, before performing the pre-wash operation, a steam washing operation is first performed on the dishwasher. The steam used in the steam washing operation comes from a steam generating assembly 9 connected to the accommodating chamber 1. In the pre-wash before the dishwasher is cleaned, a steam generator assembly connected to the accommodating chamber 1 is used to produce high-temperature water vapor and transport it into the accommodating chamber 1 of the dishwasher. This can quickly increase the temperature in the accommodating chamber 1. The humidity and high temperature of the water vapor can effectively soften residues with high viscosity or hardness, and then high-pressure water can be used to easily remove stubborn stains on the tableware.

[0107] Based on the above Figures 1 to 14 When the technical solution of the present invention is applied to a specific embodiment, it is described as follows.

[0108] Embodiment 1

[0109] like Figure 1 and Figure 2 As shown, the air duct structure of a dishwasher described in this embodiment includes an air duct connected to the storage chamber 1 of the dishwasher; a fan unit 201, a heating unit 202, a guide structure and an anti-backflow structure are arranged in the air duct; the heating unit 202 is used to heat the airflow generated by the fan unit 201 to form dry hot air that flows into the storage chamber 1 through the air inlet channel 2; the guide structure guides the turbulent airflow flowing through the air duct into an airflow with a uniform flow direction; the anti-backflow structure prevents water or steam in the storage chamber 1 from flowing back into the air duct.

[0110] The present invention provides an air duct structure that fits the dishwasher accommodating chamber 1 and changes the air flow area in the air duct, thereby achieving rapid air flow through the air duct into the accommodating chamber 1 with little air volume loss; a guide structure is provided in the air duct to guide the turbulent air flow passing through the air duct, and the air flow area after the guidance is smooth and uniform, and after passing through the grille 406 facing different angles provided at the air duct outlet 402, it is evenly dispersed into the accommodating chamber 1; an anti-backflow structure is provided in the air duct to prevent water or steam in the accommodating chamber 1 from flowing back along the air duct to cause damage to the fan unit 201, or residual corrosion and mildew in the air duct.

[0111] Embodiment 2

[0112] like Figures 3 to 5 As shown, this embodiment is a further limitation of the above-mentioned embodiment 1. In this embodiment, the air duct includes an air inlet channel 2, an air induced channel 3 and an air outlet channel 4 which are connected to the accommodating chamber 1 and are connected in sequence; the air inlet channel 2 is provided with a fan unit 201 and a heating unit 202; the air induced channel 3 is at least partially in contact with the outer wall of the accommodating chamber 1; the air outlet channel 4 is at least partially in contact with the top wall of the accommodating chamber 1 and is at least connected to the accommodating chamber 1; further, the heating unit 202 is arranged in the air inlet direction of the fan unit 201 and in the area formed inside the air inlet channel 2. By adding the heating unit 202 in the air duct, the airflow flowing through the air duct is heated, thereby achieving rapid drying of the internal environment of the washing machine.

[0113] Embodiment 3

[0114] like Figures 3 to 5As shown, this embodiment is a further limitation of the above-mentioned embodiment 1 or embodiment 2. The fan unit 201 described in this embodiment is a cross-flow fan arranged in the air inlet channel 2. By arranging the 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 has low noise during operation, which reduces the impact on the surrounding environment of the dishwasher and provides a more comfortable environment for users. Furthermore, 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 airflow flowing through the air duct is heated to achieve 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 action area is increased, and the wind resistance can be reduced, thereby reducing the air volume loss when the air passes through the PTC.

[0115] Embodiment 4

[0116] like Figures 3 to 5 As shown, this embodiment is a further limitation of any one of the embodiments described in embodiments 1 to 3 above. In this embodiment, an arc-shaped transition structure 6 is provided at the connection between the air inlet channel 2 and the air induced channel 3, and at the connection between the air induced channel 3 and the air outlet channel 4. The arc-shaped transition structure 6 forms a trend for introducing the airflow generated by the fan unit 201 from the air inlet channel 2 into the air induced channel 3 and the air outlet channel 4. At the air duct exchange, that is, the change of the airflow basin area in the air duct, an arc-shaped transition structure 6 is provided, so that the airflow passing through can be guided by the arc-shaped transition structure 6, and the flow direction is changed, thereby avoiding the hard contact between the airflow direction and the inner wall of the air duct, and the airflow passes quickly. The loss of air volume is greatly reduced; the air duct formed by the air induced channel 3 on the outer wall of the accommodating chamber 1 is a straight structure that is convenient for air flow to pass through. The straight air duct structure is convenient for air flow to pass through quickly, and avoids the loss of air volume caused by the air duct with too many arcs or bends; the cross-sectional area of ​​the air flow domain in the air induced channel 3 is smaller than the cross-sectional area of ​​the air flow domain in the air inlet channel 2. 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 area from the air duct with a large area, it obtains a higher transmission speed and quickly passes through the air duct with a small area, thereby improving the transmission efficiency of the air flow in the air duct and avoiding the loss of air volume.

[0117] Embodiment 5

[0118] like Figures 6 to 9As shown, this embodiment is a further limitation of the above-mentioned embodiments one to four. The air outlet channel 4 described in this embodiment includes an air inlet 401 and an air outlet 402; the air inlet 401 is connected with the air ducting channel 3; the air outlet 402 is connected with the accommodating chamber 1. The airflow generated by the fan unit 201 passes through the air inlet channel 2 and the air ducting channel 3, and then enters the air outlet channel 4 from the air inlet 401. Under the action of the guide structure such as the guide plate 405 in the air outlet channel 4, the airflow with a turbulent flow direction is changed into an airflow with a uniform flow direction, and finally enters the accommodating chamber 1 from the air outlet 402.

[0119] Embodiment 6

[0120] like Figures 6 to 9 As shown, this embodiment is a further limitation of the above-mentioned embodiment five. In this embodiment, the air flow basin area formed by the air outlet channel 4 from the air inlet 401 to the air outlet 402 side gradually increases, and the basin area continues to increase from the air inlet 401 to the air outlet 402. When the airflow passes through this area, the rapid flow in the diversion channel becomes slow as the basin area expands, which is conducive to the deceleration of the airflow, and facilitates the guide plate 405 and the air outlet channel 4 to guide the passing airflow, so that the turbulent airflow in the basin becomes a stable and uniform airflow in the basin.

[0121] Embodiment 7

[0122] like Figures 6 to 9 As shown, this embodiment is a further limitation of the above-mentioned embodiment five or embodiment six, and in this embodiment, a first bottom surface 403 and a second bottom surface 404 are arranged on the bottom wall of the air outlet channel 4; the first bottom surface 403 is provided with the air inlet 401; the second bottom surface 404 is provided with the air outlet 402; 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 smaller 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 from the air induction channel 3 to obtain a trend of flowing into the accommodating chamber 1 when flowing through the air outlet channel 4, thereby improving the efficiency of the airflow and avoiding the loss of the airflow in the air duct; at the same time, when the water or steam in the accommodating 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.

[0123] Embodiment 8

[0124] like Figures 6 to 9As shown, this embodiment is a further limitation of the above-mentioned embodiment seven. In this embodiment, when the airflow generated by the fan unit 201 flows in the air outlet channel 4 along 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 guide structure, and the height difference causes the airflow flowing through to form a downward flow tendency, thereby enhancing the tendency of the airflow to flow from the top of the accommodating chamber 1 to the inside of the accommodating chamber 1; further, when water or steam in the accommodating chamber 1 flows in the air outlet channel 4 along 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 water or steam flowing back from the accommodating chamber 1 to change, thereby reducing the fluidity of water or steam.

[0125] By changing the airflow basin of the duct and setting two planes of different heights at the air outlet 402, a multiple superposition of the acceleration effect of the airflow passing through is formed, ensuring that the airflow is quickly and evenly guided in the air duct and accelerated into the containing chamber 1, while forming a multiple superposition of the flowing water or steam and preventing the backflow effect, further preventing the water or steam in the containing chamber 1 from flowing back along the air duct and causing damage to the fan unit 201, or residual corrosion and mildew in the air duct.

[0126] Embodiment 9

[0127] like Figures 6 to 9 As shown, this embodiment is a further limitation of any one of the embodiments described in embodiments 1 to 8 above. In this embodiment, the side wall of the air outlet channel 4 is arranged in an arc shape, and cooperates with the guide plate 405 to form a structure for adjusting the airflow passing therethrough; the arc-shaped side wall of the air outlet channel 4 is at least partially in a C-shaped structure. By setting the shape of the air duct at the top of the accommodating chamber 1 to an arc-shaped structure approximately in the shape of a "C", it is avoided that water or steam flows back from the air duct during the operation of the dishwasher, causing damage or corrosion to the cross-flow fan.

[0128] Embodiment 10

[0129] like Figures 6 to 9As shown, this embodiment is a further limitation of any of the embodiments described in embodiments 1 to 9 above. The guide structure described in this embodiment includes a plurality of guide plates 405 arranged at intervals on the bottom wall of the air outlet channel 4. The guide plates 405 guide the turbulent airflow in the flow field flowing through the air outlet channel 4 into a smooth and uniform airflow in the flow field; the guide plates 405 guide the airflow 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 to form a trend of the airflow flowing from the air inlet 401 to the air outlet 402; further, the curvature of the guide plates 405 is the same as the curvature of the side walls of the air outlet channel 4, and the guide plates 405 having the same curvature as the side walls of the air duct enhance the guiding effect on the airflow flowing in the air duct, so that the airflow passes through the guide plates 405 and changes from a turbulent airflow to a uniform airflow; the guide plates 405 are at least partially arranged on the first bottom surface 403.

[0130] Embodiment 11

[0131] like Figures 6 to 9 As shown, this embodiment is a further limitation of any one of the embodiments described in embodiments 1 to 10 above. This embodiment describes an air duct structure of a dishwasher, and its 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 channel 4, and the water retaining rib 409 further blocks the water or steam flowing in the air outlet channel 4.

[0132] from Figures 6 to 9 It can be seen that a grille 406 is further provided at the air outlet 402 of the air outlet channel 4, and a plurality of grille pieces 407 are arranged at intervals on the grille 406; the grille pieces 407 can rotate around an axis, and at least two of the grille pieces 407 rotate around the axis at different angles and directions, thereby adjusting the air outlet angle of the grille pieces 407;

[0133] When the airflow generated by the fan unit 201 flows in the air outlet channel 4 along the side of the air inlet 401 toward the side of the air outlet 402, the airflow in the air outlet channel 4 enters the containing chamber 1 at different angles and directions under the guidance of at least two grilles 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 direction is provided at the air outlet 402 of the air duct. Furthermore, the grille 406 will face at least two different directions during the adjustment process, which ensures that the airflow has a uniform flow direction when it passes through the air duct into the containing chamber 1.

[0134] When the water or steam in the accommodating chamber 1 flows in the air outlet channel 4 along the air outlet 402 to the air inlet 401, the water or steam in the accommodating chamber 1 is at least partially blocked outside the air outlet channel 4 under the action of the grille 407 with different angles and directions. An adjustable grille 406 is provided at the air outlet 402 of the air duct. Furthermore, the grille 406 will face at least two different directions during the adjustment process, thereby achieving the initial blocking of the water or steam in the accommodating chamber 1 from entering the air duct, and reducing the probability of water or steam flowing back along the air duct.

[0135] Embodiment 12

[0136] like Figures 3 to 9 As shown, this embodiment is a further limitation of any one of the embodiments described in embodiments 1 to eleven above. This embodiment describes an air duct structure of a dishwasher, wherein the grille 406 and the air outlet 402 are detachably connected; claws are provided on the periphery of the grille 406; the air outlet 402 is provided with a slot corresponding to the claw; the claw cooperates with the slot to realize the disassembly of the grille 406 and the air outlet 402, so that the user can clean and maintain the grille 406 conveniently.

[0137] Specifically, when the air duct is assembled, a number of claws are evenly distributed around the grille 406, and the air outlet channel 4 and the accommodating chamber 1 are fixed through the cooperation of the claws and the grooves corresponding to the claws set around the accommodating chamber 1. The curved surface of the air outlet channel 4 fits with the accommodating chamber 1, and the air inlet channel 2 fits with the outer side of the bottom of the accommodating chamber 1.

[0138] Embodiment 13

[0139] like Figures 3 to 9 As shown, this embodiment is a further limitation of any one of the embodiments described in embodiments 1 to 12 above, and the anti-backflow structure described in this embodiment includes a switch part 408 which is arranged in the air outlet channel 4 and can open or close the air outlet channel 4; the switch part 408 opens or closes the air outlet channel 4 at least along the direction of the airflow flowing in the air outlet channel 4; further, the switch part 408 is connected to a driving device; after the driving device receives the opening or closing signal, it drives the switch part 408 to realize the opening or closing of the air outlet channel 4; further, 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 switch part 408 on the air outlet channel 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 channel 4 to seal the air outlet channel 4 by the switch part 408.

[0140] Embodiment 14

[0141] like Figure 4 As shown, the present embodiment is a further limitation of any one of the embodiments described in embodiments 1 to thirteen above. The anti-backflow structure described in the present embodiment also includes a water storage tank 301 arranged at the bottom of the air duct 3, and the water storage tank 301 allows the residual water along the air duct to be knocked and stored in one place; the inner wall of the air duct 3 is formed with a structure for draining the water or steam refluxed from the air outlet channel 4 to the water storage tank 301, so that the residual steam can be drained into the water storage tank 301 after being liquefied on the inner wall of the air duct; a drain outlet is provided at the lowest end of the water storage tank 301 to prevent the water or steam in the accommodating chamber 1 from flowing back along the air duct, causing the washing water to remain in the air duct for a long time, causing corrosion and deterioration; the drain outlet is opened and closed by pulling or rotating a plug; the pulling or rotation of the plug is achieved manually or electrically.

[0142] Embodiment 15

[0143] like Figures 10 to 12 As shown, this embodiment is a further limitation of any of the above-mentioned embodiments 1 to 14. The air duct structure of a dishwasher described in this embodiment also includes an exhaust channel 8 connected to the accommodating chamber 1, and the exhaust channel 8 is used to discharge the gas in the accommodating chamber 1 out of the dishwasher; further, the exhaust channel 8 is provided with an adjustment component 801, which is used to achieve the connection or disconnection between the exhaust channel 8 and the accommodating chamber 1. An adjustment mechanism capable of adjusting the size of the exhaust port is provided in the exhaust channel 8, so that the size of the area of ​​the air outlet 402 can be adjusted, which can ensure the temperature of the dishwasher during washing, save energy, and reduce the risk of water being discharged from the exhaust channel to the outside during washing; in the drying stage, the air port can be opened through the mechanism to accelerate the discharge of wind, dry quickly, and avoid the loss of heat from the accommodating chamber 1.

[0144] Embodiment 16

[0145] like Figures 10 to 12As shown, this embodiment is a further limitation of the above-mentioned embodiment fifteen. The regulating component 801 described in this embodiment includes a first regulating unit 802 and a second regulating unit 803; the first regulating unit 802 is arranged in the exhaust channel 8 to connect or disconnect the exhaust channel 8 with the accommodating chamber 1; the second regulating unit 803 is connected to the first regulating unit 802 to provide power for the first regulating unit 802 to connect or disconnect the exhaust channel 8 with the accommodating chamber 1, and an regulating mechanism capable of adjusting the size of the exhaust port is arranged in the exhaust channel 8 to achieve adjustable size of the air outlet 402 area, which can ensure the temperature of the dishwasher during washing and save energy, and can reduce the risk of water being discharged to the outside from the exhaust duct during washing; in the drying stage, the air outlet can be opened through the mechanism to accelerate the discharge of wind, quickly dry, and avoid heat loss from the accommodating chamber 1.

[0146] Embodiment 17

[0147] like Figures 10 to 12 As shown, this embodiment is a further limitation of the above-mentioned embodiment 15 or embodiment 16. In this embodiment, a slide is provided in the exhaust channel 8; the first adjustment unit 802 is provided in the slide, and moves linearly under the action of the second adjustment unit 803, thereby realizing the connection or disconnection between the exhaust channel 8 and the accommodating chamber 1; further, the area of ​​the exhaust channel 8 blocked by the first adjustment unit 802 is S1; the area of ​​the exhaust channel 8 is S2; the ratio of S1 to S2 is, 0 <S1 / S2≦1。

[0148] The operating model of the adjustment mechanism and the shape of the exhaust duct 8 are set to enhance the adaptability of the adjustment mechanism and the adaptability of exhaust ducts 8 of different dishwasher models and different shapes. At the same time, the adjustment of the exhaust duct 8 by the adjustment mechanism can meet the needs of different exhaust gears and different drying conditions.

[0149] Embodiment 18

[0150] like Figures 10 to 12 As shown, this embodiment is a further limitation of the above-mentioned embodiment 15 or embodiment 16. In this embodiment, the first adjusting unit 802 and the second adjusting unit 803 are connected via a rotating shaft 804; the first adjusting unit 802 rotates in the exhaust channel 8 under the action of the second adjusting unit 803, thereby realizing the connection or disconnection between the exhaust channel 8 and the accommodating chamber 1; the rotating shaft 804 is arranged at a position close to one end face of the first adjusting unit 802 or at the rotation center; the area of ​​the exhaust channel 8 blocked by the first adjusting unit 802 is S1; the area of ​​the exhaust channel 8 is S2; the ratio of S1 to S2 is, 0 <S1 / S2≦1。

[0151] The operating model of the adjustment mechanism and the shape of the exhaust duct 8 are set to enhance the adaptability of the adjustment mechanism and the adaptability of exhaust ducts 8 of different dishwasher models and different shapes. At the same time, the adjustment of the exhaust duct 8 by the adjustment mechanism can meet the needs of different exhaust gears and different drying conditions.

[0152] Embodiment 19

[0153] like Fig.13 As shown, this embodiment is a further limitation of any one of the embodiments described in Embodiments 1 to 18 above. The air duct structure of a dishwasher described in this embodiment further includes a steam generating component 9 connected to the accommodating chamber 1. The steam generating component 9 generates steam using water in the accommodating chamber 1 and transports it back to the accommodating chamber 1, thereby achieving steam washing of items to be washed.

[0154] Among them, the steam generating component 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 905; the first connecting pipe 901 is connected to the power unit 904; the third connecting pipe 903 is connected to the heating unit 905; the first connecting pipe 901 and the third connecting pipe 903 are respectively connected to the accommodating chamber 1; the second connecting pipe 902 connects the power unit 904 and the heating unit 905. The present invention realizes steam generation by utilizing water in the accommodating chamber 1 by setting a steam generating component 9 connected to the accommodating chamber 1, thereby generating steam to achieve cleaning of tableware and avoiding the problem of separate water introduction.

[0155] Furthermore, the water in the accommodating chamber 1, under the action of the power unit 904, passes through the first connecting pipe 901 and enters the power unit 904; after being pressurized in the power unit 904, the water enters the heating unit 905 through the second connecting pipe 902, and is heated to boil to high-temperature water vapor under the action of the heating unit 905; the high-temperature water vapor enters the accommodating chamber 1 after passing through the third connecting pipe 903, thereby realizing steam washing of the items to be washed in the accommodating chamber 1. By converting the water in the accommodating chamber 1 into high-temperature water vapor, the chamber temperature is rapidly increased in a short time, thereby effectively playing a role in sterilization and removing stains on tableware.

[0156] Furthermore, the temperature of the high-temperature water vapor is 100° C.; the first connecting pipe 901 and the third connecting pipe 903 are hoses; wherein the third connecting pipe 903 is a high-temperature resistant hose.

[0157] Embodiment 20

[0158] like Fig.13As shown, this embodiment is a further limitation of the above-mentioned embodiment 19. The air duct structure of a dishwasher described in this embodiment further includes a sink configured to accommodate items to be washed; the space in the sink for accommodating items to be washed forms the accommodating chamber 1.

[0159] Embodiment 21

[0160] like Fig.14 As shown, this embodiment is a further limitation of the above-mentioned embodiment 19 or embodiment 20. The method for using the steam generating assembly 9 in this embodiment includes the following steps:

[0161] S1. Startup process, turn on the startup power;

[0162] S2. Pre-washing process, the dishwasher performs water inlet operation and pre-washing, and after the pre-washing of the items to be washed in the accommodating chamber 11 is completed, the drainage operation is performed;

[0163] S3. During the rinsing process, the dishwasher is operated to fill with water and rinse the items to be washed. After the items to be washed in the receiving chamber 11 are rinsed, a drainage operation is performed;

[0164] S4. Drying process, performing drying operation on the dishwasher.

[0165] Embodiment 22

[0166] like Fig.14 As shown, this embodiment is a further limitation of the above-mentioned embodiment twenty-one. In the method for using the steam generating component 9 described in this embodiment, during the pre-washing process of step S2, a steam washing operation is first performed on the dishwasher before the pre-washing operation is performed; the steam used for the steam washing operation comes from the steam generating component 9 connected to the accommodating chamber 1.

[0167] Embodiment 23

[0168] like Fig.14 As shown, this embodiment is a further limitation of the above-mentioned embodiment twenty-one or embodiment twenty-two. In the method for using the steam generating component 9 described in this embodiment, during the rinsing process of step S3, at least two water intake, rinsing and drainage operations are performed.

[0169] Embodiment 24

[0170] like Fig.14 As shown, this embodiment is a further limitation of any one of the embodiments described in Embodiments 21 to 23 above. The method for using the steam generating component 9 described in this embodiment is to perform a drainage operation on the dishwasher during the startup process of step S1 after the startup power is turned on to drain the residual water in the accommodating chamber 1.

[0171] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0172] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those explicitly recited in each claim. More specifically, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present invention.

[0173] All features disclosed in this specification (including accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification (including accompanying claims, abstracts and drawings) may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless otherwise expressly stated, each feature disclosed in this specification (including accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0174] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

[0175] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

[0176] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to 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 solution of the present invention.

Claims

1. An air duct structure for a dishwasher, characterized in that: include An air inlet channel (2), an air inlet channel (3) and an air outlet channel (4) which are in communication with the accommodating chamber (1) of the dishwasher and are connected in sequence; The air inlet channel (2) is provided with a fan unit (201); The air induction channel (3) is at least partially in contact with the side wall of the accommodating chamber (1); The air outlet channel (4) is at least partially in contact with the top wall of the accommodating chamber (1) and is in communication with the accommodating chamber (1); the side wall of the air outlet channel (4) is arranged in an arc shape; A steam generating assembly (9) is in communication with the accommodating chamber (1), and utilizes the water in the accommodating chamber (1) to generate steam, and transports the steam back into the accommodating chamber (1), thereby achieving steam washing of the items to be washed; An anti-backflow structure is provided in the air duct to prevent water or steam in the containing chamber (1) from flowing back into the air duct; A first bottom surface (403) and a second bottom surface (404) are provided on the bottom wall of the air outlet channel (4); an air inlet (401) of the air outlet channel (4) is provided on the first bottom surface (403), and an air outlet (402) of the air outlet channel (4) is provided on the second bottom surface (404); the air outlet (402) is arranged downward and communicated with the accommodating chamber (1); The distance from the first bottom surface (403) to the top wall of the air outlet channel (4) is smaller than the distance from the second bottom surface (404) to the top wall of the air outlet channel (4), and there is a height difference between the first bottom surface (403) and the second bottom surface (404) for forming the anti-backflow structure.

2. The air duct structure of a dishwasher according to claim 1, characterized in that: The steam generating assembly (9) comprises a first connecting pipe (901), a second connecting pipe (902), a third connecting pipe (903), a power unit (904) and a heating unit (905); The first connecting pipe (901) is connected to the power part (904); the third connecting pipe (903) is connected to the heating part (905); The first connecting tube (901) and the third connecting tube (903) are respectively connected to the accommodating chamber (1); the second connecting tube (902) is connected to the power part (904) and the heating part (905).

3. The air duct structure of a dishwasher according to claim 2, characterized in that: Under the action of the power unit (904), the water in the containing chamber (1) passes through the first connecting pipe (901) and enters the power unit (904); After being pressurized in the power unit (904), the water enters the heating unit (905) through the second connecting pipe (902) and is heated and boiled to high-temperature steam under the action of the heating unit (905); The high-temperature water vapor enters the accommodating chamber (1) through the third connecting pipe (903), thereby achieving steam washing of the items to be washed in the accommodating chamber (1).

4. The air duct structure of a dishwasher according to claim 3, characterized in that: The temperature of the high-temperature steam is 100°C.

5. The air duct structure of a dishwasher according to claim 3, characterized in that: The first connecting pipe (901) and the third connecting pipe (903) are flexible pipes.

6. The air duct structure of a dishwasher according to claim 5, characterized in that: The third connecting pipe (903) is a high temperature resistant hose.

7. The air duct structure of a dishwasher according to claim 1, characterized in that: Also includes a sink configured to hold items to be washed; The space in the sink that accommodates items to be washed forms the accommodating chamber (1).

8. The air duct structure of a dishwasher according to claim 1, characterized in that: The air inlet (401) is in communication with the air induction channel (3).

9. The air duct structure of a dishwasher according to claim 8, characterized in that: The air flow area formed by the air outlet channel (4) gradually increases from the air inlet (401) to the air outlet (402).

10. The air duct structure of a dishwasher according to claim 1, characterized in that: The backflow prevention structure comprises a grille (406) arranged at the air outlet (402); A plurality of grid sheets (407) are arranged at intervals on the grid (406).

11. The air duct structure of a dishwasher according to claim 10, characterized in that: The grille (407) can rotate around an axis, thereby adjusting the air outlet angle of the grille (407).

12. The air duct structure of a dishwasher according to claim 11, characterized in that: At least two of the grid plates (407) rotate around the axis at different angles and directions; The water or steam in the containing chamber (1) is at least partially blocked outside the air outlet channel (4) under the action of the grille (407) with different angles and directions.

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

14. The air duct structure of a dishwasher according to claim 13, characterized in that: The periphery of the grille (406) is provided with claws; The air outlet (402) is provided with a slot corresponding to the claw; The clamping claw cooperates with the clamping slot to achieve the disassembly of the grille (406) and the air outlet (402).

15. The air duct structure of a dishwasher according to any one of claims 1 to 14, characterized in that: The anti-backflow structure comprises a switch portion (408) arranged in the air outlet channel (4) and capable of opening or closing the air outlet channel (4).

16. The air duct structure of a dishwasher according to claim 15, characterized in that: The switch portion (408) opens or closes the air outlet channel (4) at least along the direction in which the airflow flows in the air outlet channel (4).

17. The air duct structure of a dishwasher according to claim 15, characterized in that: The switch part (408) is connected to a driving device; After receiving the opening or closing signal, the driving device drives the switch part (408) to open or close the air outlet channel (4).

18. The air duct structure of a dishwasher according to claim 15, characterized in that: At least the outer edge of the switch portion (408) is wrapped with an elastic sealing structure; When the switch portion (408) is closed, the sealing structure cooperates with the inner wall of the air outlet channel (4) to achieve sealing of the air outlet channel (4) by the switch portion (408).

19. The air duct structure of a dishwasher according to any one of claims 1 to 14, characterized in that: The anti-backflow structure comprises 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 channel (4).

20. The air duct structure of a dishwasher according to claim 1, characterized in that: The backflow prevention structure comprises a water storage tank (301) arranged at the bottom of the air induction channel (3).

21. The air duct structure of a dishwasher according to claim 20, characterized in that: The inner wall of the air induction channel (3) is formed with a structure for guiding the water or steam returning from the air outlet channel (4) to the water storage tank (301).

22. The air duct structure of a dishwasher according to claim 20, characterized in that: The lowest end of the water storage tank (301) is provided with a drainage outlet.

23. The air duct structure of a dishwasher according to claim 22, characterized in that: The drain outlet is opened and closed by pulling or rotating the plug.

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

25. The air duct structure of a dishwasher according to any one of claims 1, 20-24, characterized in that: An arc-shaped transition structure (6) is provided at the connection between the air inlet channel (2) and the air induction channel (3), and at the connection between the air induction channel (3) and the air outlet channel (4); The arc-shaped transition structure (6) forms a tendency for the airflow generated by the fan unit (201) to be introduced from the air inlet channel (2) into the air inlet channel (3) and the air outlet channel (4).

26. The air duct structure of a dishwasher according to claim 25, characterized in that: The air duct (3) formed on the outer wall of the accommodating chamber (1) is a straight-line structure that facilitates the passage of air.

27. The air duct structure of a dishwasher according to claim 26, characterized in that: The cross-sectional area of ​​the air flow region in the air induction channel (3) is smaller than the cross-sectional area of ​​the air flow region in the air inlet channel (2).

28. The air duct structure of a dishwasher according to any one of claims 1, 20-24, characterized in that: At least part of the arc-shaped side wall of the air outlet channel (4) is in a C-shaped structure.

29. The air duct structure of a dishwasher according to any one of claims 1, 20-24, characterized in that: The fan unit (201) is a cross-flow fan arranged in the air inlet channel (2).

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