Air duct structure of a dishwasher

Abstract

The present invention discloses an air duct structure of a dishwasher, comprising a first air duct and a second air duct connected to a receiving chamber of the dishwasher; the first air duct is provided with a fan unit; under the action of the fan unit, the gas in the receiving chamber is discharged from the dishwasher from the first air duct; the gas outside the receiving chamber enters the receiving chamber from the second air duct; the first air duct is also provided with an anti-backflow structure for preventing water or steam from flowing back from the receiving chamber along the air duct. The present invention provides an air duct structure of a dishwasher, which reduces the impact of the dishwasher on the surrounding environment by arranging a cross-flow fan in the first air duct, utilizing the characteristics of the cross-flow fan with large air volume and low noise; at the same time, the cross-flow fan adopts the use mode of exhausting air from the receiving chamber, cooperates with the PTC heater arranged on the second air duct, draws the receiving chamber into negative pressure, and uses the drying mode of hot air entering from the second air duct, thereby realizing the rapid drying of the receiving chamber of the dishwasher.

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 higher and higher requirements for product quality, performance, humanization of use, intelligent operation and other aspects. 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 use waste heat to dry the tableware, and some use additional drying systems to dry the tableware. The drying system can be an exhaust system, through which the humid air inside the dishwasher is discharged to the outside to achieve the purpose of drying. At present, the air source of dishwashers mostly uses centrifugal fans and axial flow fans to provide air sources. Such fans have the disadvantages of small air volume and high noise. The use of perfusion fans can effectively avoid these disadvantages, with large air volume and low noise.

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

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

[0005] Although the above-mentioned prior art discloses a technical solution for exhausting dishwashers, there are still disadvantages such as small air volume and high noise of the drying fan; severe loss and low transmission efficiency of the airflow generated by the fan during the process of being transported to the containing chamber; water or steam in the inner tank of the dishwasher flows back along the air duct, causing corrosion or mold on the fan, etc.

[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 arranging a cross-flow fan in the first air duct, the characteristics of the cross-flow fan with large air volume and low noise are utilized, thereby reducing the impact of the dishwasher on the surrounding environment; at the same time, the cross-flow fan adopts the method of exhausting air from the accommodating chamber, and cooperates with the PTC heater arranged on the second air duct to realize a drying method in which the accommodating chamber is evacuated into a negative pressure and hot air is introduced from the second air duct, thereby realizing rapid drying of the internal space of the accommodating chamber of the dishwasher.

[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 an air duct structure of a dishwasher 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] a first air duct and a second air duct in communication with a receiving chamber of the dishwasher;

[0011] The first air duct is provided with a fan unit;

[0012] Under the action of the fan unit, the gas in the containing chamber is discharged from the dishwasher through the first air duct;

[0013] The gas outside the containing chamber enters the containing chamber from the second air duct;

[0014] The first air duct is also provided with an anti-backflow structure for preventing water or steam from flowing back from the accommodating chamber along the air duct.

[0015] Wherein, the gas in the accommodating chamber has a tendency to be discharged from the accommodating chamber along the first air duct out of the dishwasher under the action of the fan unit. By arranging a cross-flow fan in the first air duct, a large amount of dry air source is provided. Meanwhile, the cross-flow fan has low noise during operation, which reduces the impact on the environment around the dishwasher, and provides a more comfortable environment for users.

[0016] In one embodiment, under the effect of negative pressure formed in the containing chamber, the gas outside the containing chamber enters the containing chamber from the second air duct;

[0017] In one embodiment, a heating unit is further provided in the second air duct;

[0018] In one embodiment, the heating unit is disposed in a region formed by the air inlet direction of the second air duct;

[0019] After the gas outside the receiving chamber passes through the second air duct, under the action of the heating unit, a dry hot air flow is formed, and the cross-flow fan arranged in the first air duct and the PTC heater arranged on the second air duct cooperate to realize a drying method in which the receiving chamber is evacuated to a negative pressure and hot air is introduced from the second air duct, thereby realizing a rapid drying of the space inside the receiving chamber of the dishwasher;

[0020] In one embodiment, the heating area formed by the heating unit in the second air duct at least covers the air flow area of ​​the cross section of the second air duct. By setting the installation position of the heating unit, the heating area of ​​the heating unit is increased, and the wind resistance can be reduced, thereby reducing the air volume loss when the air passes through the heating unit.

[0021] In one embodiment, the heating unit is a PTC heater disposed in the second air duct;

[0022] In one embodiment, the fan unit is a cross-flow fan arranged in the first air duct. By arranging the cross-flow fan in the first air duct, 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.

[0023] In addition, the first air duct includes

[0024] An air inlet channel, an air inlet channel and an air outlet channel communicated with the accommodating chamber and connected in sequence;

[0025] The air outlet channel is provided with the fan unit;

[0026] The air induction channel is at least partially in contact with the outer wall of the accommodating chamber;

[0027] The air inlet channel is at least partially in contact with the top wall of the accommodating chamber and is in communication with the accommodating chamber;

[0028] In one embodiment, 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;

[0029] The arc-shaped transition structure forms a tendency to introduce the gas in the containing chamber from the air inlet channel into the air induction 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 arranged, 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;

[0030] The airflow generated by the fan unit is introduced from the air inlet channel into the air inlet channel and the air outlet channel;

[0031] 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.

[0032] 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.

[0033] In one embodiment, the side wall of the air inlet channel is arranged in an arc shape, and cooperates with the guide plate to form a structure for adjusting the airflow passing therethrough;

[0034] In one embodiment, the curved side wall of the air inlet channel is at least partially C-shaped. By setting the shape of the air duct at the top of the accommodating chamber to an approximately "C"-shaped curved structure, water or steam can be prevented from flowing back from the air duct during operation of the dishwasher, thereby preventing damage or corrosion to the cross-flow fan.

[0035] Furthermore, the air inlet channel includes an air inlet and an air outlet;

[0036] The air inlet is in communication with the accommodating chamber;

[0037] The air outlet is in communication with the air induction channel;

[0038] In one embodiment, the air flow basin area formed by the air inlet channel gradually decreases from the air inlet to the air outlet. The continuous decrease in 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 inlet 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;

[0039] In one embodiment, the backflow prevention structure includes a grille disposed at the air inlet;

[0040] A plurality of grid sheets are arranged at intervals on the grid;

[0041] In one embodiment, the grille can rotate around an axis to adjust the air outlet angle of the grille, 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;

[0042] In one embodiment, at least two of the grid plates rotate around the axis at different angles and directions;

[0043] The water or steam in the containing chamber is at least partially blocked outside the air outlet channel under the action of the grilles with different angles and directions. A grille with adjustable direction is provided at the air inlet 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.

[0044] In one embodiment, the grille is detachably connected to the air inlet;

[0045] In one embodiment, the periphery of the grille is provided with claws;

[0046] The air inlet is provided with a slot corresponding to the claw;

[0047] 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.

[0048] Furthermore, the anti-backflow structure includes a switch part arranged in the air inlet channel, which can open or close the air inlet channel, and the switch part realizes the closure of the air inlet channel, ensures the isolation of the air inlet channel and the dishwasher receiving chamber, and avoids the backflow of water or steam during washing or steam drying;

[0049] In one embodiment, the switch portion opens or closes the air inlet channel at least along the direction in which the airflow flows in the air inlet channel;

[0050] In one embodiment, the switch portion is connected to a drive device;

[0051] After receiving the opening or closing signal, the driving device drives the switch unit to open or close the air inlet channel;

[0052] 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;

[0053] When the switch part is closed, the sealing structure cooperates with the inner wall of the air inlet channel, so that the switch part seals the air inlet channel.

[0054] Still further, the backflow prevention structure includes a first bottom surface and a second bottom surface arranged on the bottom wall of the air inlet channel;

[0055] The air inlet is arranged on the first bottom surface;

[0056] The air outlet is arranged on the second bottom surface;

[0057] 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;

[0058] In one embodiment, the distance from the first bottom surface to the top wall of the air outlet channel is greater than the distance from the second bottom surface to the top wall of the air outlet channel;

[0059] In one embodiment, the anti-backflow structure includes a water retaining rib disposed on the second bottom surface, the water retaining rib further retaining water or steam flowing in the air inlet channel;

[0060] The water retaining ribs are arranged perpendicular to the flow direction of water or steam in the air inlet channel.

[0061] Furthermore, 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;

[0062] 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 inlet 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;

[0063] 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;

[0064] In one embodiment, the drain port is opened and closed by pulling or rotating the plug;

[0065] In one embodiment, the pulling or rotating of the plug body is achieved manually or electrically.

[0066] Meanwhile, an adjustment component is provided in the second air duct;

[0067] The regulating assembly is used to realize the connection or disconnection between the second air duct and the accommodating chamber;

[0068] In one embodiment, the adjustment assembly includes a first adjustment unit and a second adjustment unit;

[0069] The first regulating unit is disposed in the second air duct to connect or disconnect the second air duct with the accommodating chamber;

[0070] The second regulating unit is connected to the first regulating unit to provide power for the first regulating unit, so as to realize connection or disconnection between the second air duct and the accommodating chamber. An regulating mechanism capable of adjusting the size of the exhaust port is provided in the second air duct to realize adjustable size of the air outlet area, thereby ensuring the temperature of the dishwasher during washing and saving energy, and reducing the risk of water backflowing from the second air duct during washing and causing damage to the PTC heater. In the drying stage, the second air duct can be opened through the mechanism, and the negative pressure in the accommodating chamber can be used to make the airflow outside the second air duct flow from the second air duct into the interior of the accommodating chamber.

[0071] In one embodiment, a slideway is provided in the second air duct;

[0072] The first regulating unit is disposed in the slideway, and moves linearly under the action of the second regulating unit, thereby realizing the connection or disconnection between the second air duct and the accommodating chamber;

[0073] In one embodiment, the area of ​​the second air duct blocked by the first regulating unit is S1;

[0074] The area of ​​the second air duct is S2;

[0075] The ratio of S1 to S2 is 0 <S1 / S2≦1。

[0076] In one embodiment, the first adjustment unit is connected to the second adjustment unit via a rotating shaft;

[0077] The first regulating unit rotates in the second air duct under the action of the second regulating unit, thereby achieving connection or disconnection between the second air duct and the accommodating chamber;

[0078] In one embodiment, the rotation axis is arranged at a position of the first adjustment unit close to an end surface or at a rotation center;

[0079] In one embodiment, the area of ​​the second air duct blocked by the first regulating unit is S1;

[0080] The area of ​​the second air duct is S2;

[0081] The ratio of S1 to S2 is 0 <S1 / S2≦1。

[0082] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0083] 1. The present invention provides an air duct structure that fits the receiving chamber of the dishwasher and changes the air flow area in the air duct, so that the airflow quickly passes through the air duct and enters the first air duct from the receiving chamber, thereby forming a negative pressure receiving chamber. The gas outside the second air duct is affected by the negative pressure receiving chamber and enters the receiving chamber along the second air duct, thereby achieving drying of the receiving chamber.

[0084] 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;

[0085] 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;

[0086] 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;

[0087] 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;

[0088] 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;

[0089] 7. By setting a cross-flow fan in the first air duct, a large amount of dry air source is provided. At the same time, the cross-flow fan has low noise during operation, which reduces the impact on the environment around the dishwasher and provides a more comfortable environment for users.

[0090] 8. By setting a cross-flow fan in the first air duct and cooperating with a PTC heater set in the second air duct, the accommodating chamber is evacuated to a negative pressure, and a drying method in which hot air is introduced from the second air duct is achieved, thereby achieving rapid drying of the internal space of the dishwasher accommodating chamber.

[0091] 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

[0092] 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.

[0093] In the attached picture:

[0094] Figure 1 It is a first schematic diagram of the overall assembly of the air duct structure of the dishwasher of the present invention;

[0095] Figure 2 It is a second schematic diagram of the overall assembly of the air duct structure of the dishwasher of the present invention;

[0096] Figure 3 is a first schematic diagram of the air duct structure of the present invention;

[0097] Figure 4 is a second schematic diagram of the air duct structure of the present invention;

[0098] Figure 5 is a first schematic diagram of the air inlet channel of the present invention;

[0099] Figure 6 is a second schematic diagram of the air inlet channel of the present invention;

[0100] Figure 7 is a third schematic diagram of the air inlet channel of the present invention;

[0101] Figure 8 is a fourth schematic diagram of the air inlet channel of the present invention;

[0102] Fig. 9 is a first schematic diagram of the second air duct of the present invention;

[0103] Fig.10 is a second schematic diagram of the second air duct of the present invention;

[0104] Fig.11 is a first schematic diagram of the adjustment assembly of the present invention;

[0105] Fig.12 is a second schematic diagram of the adjustment assembly of the present invention;

[0106] Fig.13 is a schematic diagram of a steam generating assembly of the present invention;

[0107] Fig.14 It is a logical schematic diagram of the use process of the steam generating component of the present invention.

[0108] In the figure: 1. accommodating chamber; 2. first air duct; 201. fan unit; 202. guide plate; 203. air inlet channel; 204. air inlet channel; 205. air outlet channel; 206. transition structure; 207. air inlet; 208. air outlet; 209. grille; 210. grid; 211. switch part; 212. first bottom surface; 213. second bottom surface; 214. water retaining rib; 215. water storage tank; 3. second air duct; 301. heating unit; 302. adjusting component; 303. first adjusting unit; 304. second adjusting unit; 305. rotating shaft; 4. steam generating component; 401. first connecting pipe; 402. second connecting pipe; 403. third connecting pipe; 404. power unit; 405. heating unit.

[0109] 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

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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 from the figure that the first air duct 2 and the second air duct 3 of the present invention, wherein the first air duct 2 includes an air inlet channel 203, an air induction channel 204 and an air outlet channel 205, and the air outlet channel 205 is externally provided with a fan unit 201, and the fan unit 201 generates a wind direction for extracting gas from the accommodating chamber 1, so that the airflow in the accommodating chamber 1 is discharged from the dishwasher along the air inlet channel 203, the air induction channel and the air outlet channel 205, thereby generating a negative pressure in the accommodating chamber 1, and the second air duct 3 is connected to the accommodating chamber 1. Since the accommodating chamber 1 is evacuated to a negative pressure, a tendency of sucking gas from the second air duct 3 is formed, and the airflow outside the second air duct 3 It enters the containing chamber 1 along the second air duct 3. In addition, a heating unit 301 can be set in the second air duct 3, and the air flow passing through is heated by the heating unit 301 to form a hot dry air flow entering the containing chamber 1 from the second air duct 3; further, the air outlet channel 205 is arranged at the bottom of the containing chamber 1, the air induced channel 204 is close to the side wall of the containing chamber 1, and the air inlet channel 203 is close to the top of the containing chamber 1. At the same time, the air inlet channel 203 is arranged to be an arc structure that is approximately C-shaped. The air flow generated by the fan unit 201 passes through the air outlet channel 205, the air induced channel 204 and the air inlet channel 203 to extract the gas in the containing chamber 1.

[0115] Figure 3 and Figure 4 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. Figure 3 and Figure 4It can be seen that the air duct includes an air inlet channel 203, an air induced draft channel 204, and an air outlet channel 205. During the air duct conversion process, an arc-shaped transition structure 206 is also provided. The transition structure 206 is provided at the place where the air duct flow area changes, so that the airflow passing through can change its flow direction under the guidance of the arc-shaped transition structure 206, thereby avoiding the hard contact between the airflow direction and the inner wall of the air duct and allowing the airflow to pass quickly; and, a water storage tank 215 is also provided at the air induced draft channel 204. The inner wall of the air induced draft channel 204 is formed with a structure for guiding the water or steam refluxed from the air inlet channel 203 to the water storage tank 215. The structure of the inner wall of the air induced draft channel 204 can be understood as a structure inclined toward the water storage tank 215. The steam attached to the inner wall of the air induced draft channel 204 converges into the water storage tank 215 under the action of the inclined inner wall.

[0116] Figures 5 to 8 The first, second, third and fourth schematic diagrams of the air inlet channel 203 of the present invention are shown in the drawings. It can be seen from the drawings that the air inlet channel 203 is an approximately C-shaped arc-shaped structure. An air outlet 208 connected to the air inlet channel 204 and an air inlet 207 connected to the accommodating chamber 1 are arranged in the air inlet channel 203. A water retaining rib 214, a guide plate 202, and a first bottom surface 212 and a second bottom surface 213 with a height difference are also arranged inside the air inlet channel 203; wherein the guide plate 202 is also an arc-shaped structure, and has the same curvature as the arc-shaped side wall of the air inlet channel 203, which plays a role in guiding the airflow in the air outlet channel 205 while avoiding the backflow of water or steam in the accommodating chamber 1. The water or steam in the accommodating chamber 1 is prevented from flowing back due to the arc-shaped side wall of the air outlet channel 205, the guide plate 202, the height difference between the first bottom surface 212 and the second bottom surface 213, and the water retaining rib 214. In the embodiment of the present invention, the air inlet 207 of the air outlet channel 205 is provided with a grille 209, and a plurality of grilles 210 are arranged on the grille 209 at intervals; further, the grille 210 can rotate around an axis, and the angles and directions of rotation of at least two of the grilles 210 around the axis are different, thereby adjusting the air outlet angle of the grille 210; further, the grille 209 is detachably connected to the air inlet 207, and the periphery of the grille 209 is provided with claws, and the air inlet 207 is provided with slots corresponding to the claws; the claws cooperate with the slots to realize the disassembly of the grille 209 and the air inlet 207, so as to facilitate the user to clean and maintain the grille 209.

[0117] Figures 9 to 12 1 and 2 are the first and second schematic diagrams of the second air duct 3 and the first and second schematic diagrams of the adjustment component 302 of the present invention.

[0118] As can be seen from the figure, the present invention sets an adjustment component 302 on the second air duct 3 that can connect or disconnect the exhaust channel. By setting an adjustment mechanism that can adjust the size of the exhaust port on the second air duct 3, the size of the air inlet 207 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 second air duct 3 during washing; in the drying stage, the air port can be opened through the mechanism to accelerate the entry of wind and dry quickly; at the same time, the adjustment component 302 of the present invention adopts two technical solutions, which can be moved horizontally and flipped and rotated, and the shape of the second air duct 3 can be changed in many ways. Fig.11 and Fig.12 The second air duct 3 is only a rectangle, 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 channel aims to enhance the adaptability of the adjustment mechanism and the adaptability of the second air duct 3 of different dishwasher models and different shapes. At the same time, the adjustment of the second air duct 3 by the adjustment mechanism can meet the needs of different gears of air intake and different drying conditions.

[0119] Fig.13 It is a schematic diagram of the steam generating component 4 of the present invention. It can be seen from the figure that the accommodating chamber 1 is connected to the steam generating component 4. By setting up the steam generating component 4 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.

[0120] Fig.14 The steam generating assembly 4 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 the steam generating assembly 4 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. The temperature in the accommodating chamber 1 can be quickly increased. The humidity and high temperature of the water vapor can effectively soften residues with high viscosity or hardness. Subsequently, high-pressure water can be used to easily remove stubborn stains on the tableware.

[0121] 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.

[0122] Embodiment 1

[0123] like Figure 1 and Figure 2As shown, the air duct structure of a dishwasher described in this embodiment includes a first air duct 2 and a second air duct 3 connected to a receiving chamber 1 of the dishwasher; the first air duct 2 is provided with a fan unit 201; under the action of the fan unit 201, the gas in the receiving chamber 1 is discharged from the dishwasher from the first air duct 2; the gas outside the receiving chamber 1 enters the receiving chamber 1 from the second air duct 3; the first air duct 2 is also provided with an anti-backflow structure for preventing water or steam from flowing back from the receiving chamber 1 along the air duct.

[0124] The present invention realizes that the airflow passes through the air duct quickly by setting an air duct structure that fits the dishwasher accommodating chamber 1 and changes the airflow basin area in the air duct, and enters the first air duct 2 from the accommodating chamber 1, thereby forming a negative pressure accommodating chamber 1. The gas outside the second air duct 3 is affected by the negative pressure accommodating chamber 1 and enters the accommodating chamber 1 along the second air duct 3, thereby achieving drying of the accommodating chamber 1; further, by setting an anti-backflow structure in the air duct, it is avoided that water or steam in the accommodating chamber 1 flows back along the air duct to cause damage to the fan unit 201, or that the residue in the air duct causes corrosion and mold.

[0125] Embodiment 2

[0126] like Figures 1 to 4 As shown, this embodiment is a further limitation of the above-mentioned embodiment 1. The air duct structure of a dishwasher described in this embodiment has a tendency for the gas in the accommodating chamber 1 to be discharged from the dishwasher along the first air duct 2 under the action of the fan unit 201. A large amount of dry air source is provided by arranging a cross-flow fan in the first air duct 2. 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. Under the action of negative pressure formed in the accommodating chamber 1, the external gas of the accommodating chamber 1 enters the accommodating chamber 1 from the second air duct 3.

[0127] Embodiment 3

[0128] like Fig. 9 As shown, this embodiment is a further limitation of the above-mentioned embodiment 1 or embodiment 2. In this embodiment, a heating unit 301 is further provided in the second air duct 3; the heating unit 301 is arranged in the area formed by the air inlet direction of the second air duct 3; the gas outside the accommodating chamber 1, after passing through the second air duct 3, forms a dry hot air flow under the action of the heating unit 301, and through the cross-flow fan arranged in the first air duct 2 and the PTC heater arranged on the second air duct 3, the accommodating chamber 1 is evacuated into a negative pressure, and a drying method in which hot air is introduced from the second air duct 3 is realized, thereby realizing rapid drying of the internal space of the dishwasher accommodating chamber 1.

[0129] Embodiment 4

[0130] like Figures 1 to 4 , Fig. 9 As shown, this embodiment is a further limitation of any one of the embodiments described in embodiments 1 to 3 above. The heating width formed by the heating unit 301 in the second air duct 3 in this embodiment at least covers the air flow domain of the cross section of the second air duct 3. The installation position of the heating unit 301 is set to increase the heating action area of ​​the heating unit 301, and the wind resistance can be reduced, thereby reducing the air volume loss passing through the heating unit 301. The heating unit 301 is a PTC heater arranged in the second air duct 3. The fan unit 201 is a cross-flow fan arranged in the first air duct 2. By arranging the cross-flow fan in the first air duct 2, a large amount of dry 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.

[0131] By setting a cross-flow fan in the first air duct 2 and cooperating with a PTC heater set on the second air duct 3, a negative pressure is created in the accommodating chamber 1, and hot air is introduced from the second air duct 3 to dry the internal space of the dishwasher accommodating chamber 1, thereby achieving rapid drying.

[0132] Embodiment 5

[0133] like Figures 3 to 8 As shown, this embodiment is a further limitation of any one of the embodiments described in Embodiments 1 to 4 above. In this embodiment, the first air duct 2 includes an air inlet channel 203, an air induction channel 204 and an air outlet channel 205 which are communicated with the accommodating chamber 1 and are connected in sequence; the air outlet channel 205 is provided with the fan unit 201; the air induction channel 204 is at least partially fitted with the outer wall of the accommodating chamber 1; the air inlet channel 203 is at least partially fitted with the top wall of the accommodating chamber 1 and is communicated with the accommodating chamber 1; the connection between the air inlet channel 203 and the air induction channel 204, and between the air induction channel 204 and the air outlet channel 205 is provided with An arc-shaped transition structure 206; the arc-shaped transition structure 206 forms a tendency for the gas in the accommodating chamber 1 to be introduced into the air duct 204 and the air outlet duct 205 from the air inlet duct 203. At the place where the air duct is exchanged, i.e., where the air flow area in the air duct changes, an arc-shaped transition structure 206 is provided so that the airflow passing through can be guided by the arc-shaped transition structure 206 and its flow direction is 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; the airflow generated by the fan unit 201 is introduced into the air duct 204 and the air outlet duct 205 from the air inlet duct 203.

[0134] Embodiment 6

[0135] like Figures 3 to 8 As shown, this embodiment is a further limitation of any one of the embodiments described in embodiments 1 to 5 above. The air duct 204 described in this embodiment is formed on the outer wall of the accommodating chamber 1 and is a straight structure that is convenient for airflow to pass through. The straight air duct structure is convenient for airflow 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 airflow domain in the air duct 204 is smaller than the cross-sectional area of ​​the airflow domain in the air inlet channel 203. The area difference between the airflow domains of the two air ducts is conducive to the acceleration of the airflow during the flow process. The airflow passes through the large area of ​​the domain. When the air duct enters the air duct of the small-area flow basin, it obtains a higher transmission speed and quickly passes through the air duct of the small-area flow basin, thereby improving the transmission efficiency of the airflow in the air duct and avoiding the loss of air volume; the side wall of the air inlet channel 203 is arranged in an arc shape, and cooperates with the guide plate 202 to form a structure for adjusting the airflow passing through; the arc-shaped side wall of the air inlet channel 203 is at least partially C-shaped. By setting the shape of the air duct at the top of the accommodating chamber 1 to an arc-shaped structure that is approximately "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.

[0136] Embodiment 7

[0137] like Figures 5 to 8 As shown, this embodiment is a further limitation of any one of the embodiments described in embodiments one to six above. The air inlet channel 203 described in this embodiment includes an air inlet 207 and an air outlet 208; the air inlet 207 is connected to the accommodating chamber 1; the air outlet 208 is connected to the air inlet channel 204; the air flow basin area formed by the air inlet channel 203 from the air inlet 207 to the air outlet 208 side gradually becomes smaller, and the continuous reduction of the flow basin area from the air inlet 207 to the air outlet 208 is conducive to the deceleration of the air flow, and facilitates the guide plate 202 and the air inlet channel 203 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.

[0138] Embodiment 8

[0139] like Figures 1 to 8As shown, this embodiment is a further limitation of any one of the embodiments described in the above-mentioned embodiments 1 to 7. The anti-backflow structure described in this embodiment includes a grille 209 arranged at the air inlet 207; a plurality of grilles 210 are arranged at intervals on the grille 209; the grille 210 can rotate around an axis, thereby adjusting the air outlet angle of the grille 210, thereby achieving the initial shielding of water or steam in the receiving chamber 1 from entering the air duct, and reducing the probability of water or steam backflowing along the air duct; at least two of the grilles 210 rotate around the axis at different angles and directions; the water or steam in the receiving chamber 1, under the action of the grilles 210 with different angles and directions, at least part of the A grille 209 with adjustable direction is provided at the air inlet 207 of the air duct. Furthermore, the grille 209 will face at least two different directions during the adjustment process, thereby achieving the initial blocking of 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; the grille 209 and the air inlet 207 are detachably connected; claws are provided on the periphery of the grille 209; a slot is provided on the air inlet 207 corresponding to the claw; the claw cooperates with the slot to achieve the disassembly of the grille 209 and the air outlet 208, so that the user can clean and maintain the grille 209 conveniently.

[0140] The present invention provides an anti-backflow structure in the air duct, thereby preventing water or steam in the accommodating chamber 1 from flowing back along the air duct, causing damage to the fan unit 201, or residual corrosion and mildew in the air duct; a grille 209 with an adjustable direction is provided at the air duct outlet 208. Furthermore, the grille 209 will face at least two different directions during the adjustment process, thereby achieving initial blocking of water or steam in the accommodating chamber 1 from entering the air duct, thereby reducing the probability of water or steam flowing back along the air duct; by setting the shape of the air duct at the top of the accommodating chamber 1 to an arc structure that is approximately "C"-shaped, it is avoided that water or steam flows back from the air duct during the operation of the dishwasher, thereby causing damage or corrosion to the cross-flow fan.

[0141] Embodiment 9

[0142] like Figures 1 to 8As shown, this embodiment is a further limitation of any one of the embodiments described in embodiments 1 to 8 above. The anti-backflow structure described in this embodiment includes a switch portion 211 which is arranged in the air inlet channel 203 and can open or close the air inlet channel 203. The switch portion 211 realizes the closure of the air inlet channel 203, ensures the isolation of the air inlet channel 203 from the dishwasher accommodating chamber 1, and avoids the backflow of water or steam during washing or steam drying. The switch portion 211 opens or closes the air inlet channel 203 at least along the direction of airflow flowing in the air inlet channel 203. The switch portion 211 is connected to a driving device. After receiving the opening or closing signal, the driving device drives the switch portion 211 to realize the opening or closing of the air inlet channel 203.

[0143] Furthermore, at least the outer edge of the switch part 211 is wrapped with an elastic sealing structure, which ensures the sealing effect of the air outlet channel 205 when the switch part 211 is in a closed state; when the switch part 211 is closed, the sealing structure cooperates with the inner wall of the air inlet channel 203, and the switch part 211 seals the air inlet channel 203.

[0144] Embodiment 10

[0145] like Figures 1 to 8 As shown, this embodiment is a further limitation of any of the embodiments described in the above embodiments 1 to 9. The anti-backflow structure described in this embodiment includes a first bottom surface 212 and a second bottom surface 213 arranged on the bottom wall of the air inlet channel 203; the first bottom surface 212 is provided with the air inlet 207; the second bottom surface 213 is provided with the air outlet 208; a height difference is provided between the first bottom surface 212 and the second bottom surface 213 to form the anti-backflow structure, and the height difference makes the air backflowing from the accommodating chamber 1 The flow trajectory of water or steam changes, reducing the fluidity of water or steam; the distance from the first bottom surface 212 to the top wall of the air outlet channel 205 is greater than the distance from the second bottom surface 213 to the top wall of the air outlet channel 205; further, the anti-backflow structure includes a water retaining rib 214 arranged on the second bottom surface 213, and the water retaining rib 214 further blocks the water or steam flowing in the air inlet channel 203; the water retaining rib 214 is arranged perpendicular to the flow direction of water or steam in the air inlet channel 203.

[0146] The water or steam in the accommodating chamber 1 is effectively blocked outside the drainage duct by the arc-shaped side wall of the air outlet channel 205, the guide plate 202, the height difference between the first bottom surface 212 and the second bottom surface 213, and the water retaining rib 214, so as to prevent the water or steam from flowing along the drainage duct to the fan unit 201 and causing damage to the fan unit 201. In addition, a grille 209 is provided at the air inlet 207 of the air outlet channel 205; a plurality of grilles 210 are provided on the grille 209 at intervals; further, the grilles 210 can rotate around an axis, and the angles and directions of rotation of at least two of the grilles 210 around the axis are different, thereby adjusting the air outlet angle of the grilles 210; further, the grille 209 and the air inlet 207 are detachably connected, and the periphery of the grille 209 is provided with claws, and the air inlet 207 is provided with slots corresponding to the claws; the claws cooperate with the slots to realize the disassembly of the grille 209 and the air inlet 207, which is convenient for users to clean and maintain the grille 209.

[0147] Embodiment 11

[0148] like Figures 1 to 8 As shown, this embodiment is a further limitation of any one of the embodiments one to ten above, and the anti-backflow structure of this embodiment also includes a water storage tank 215 arranged at the bottom of the air duct 204, and the water storage tank 215 allows the residual water along the air duct to be knocked and stored in one place.

[0149] Embodiment 12

[0150] like Figures 1 to 8 As shown, this embodiment is a further limitation of the above-mentioned embodiment eleven. In this embodiment, the inner wall of the air induced passage 204 is formed with a structure for guiding the water or steam refluxed from the air inlet passage 203 to the water storage tank 215, so that the residual steam can be guided to the water storage tank 215 after being liquefied on the inner wall of the air duct; the structure of the inner wall of the air induced passage 204 can be understood as a structure inclined toward the water storage tank 215, and the steam attached to the inner wall of the air induced passage 204 is converged into the water storage tank 215 under the action of the inclined inner wall.

[0151] Furthermore, a drain outlet is provided at the lowest end of the water storage tank 215 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, thereby causing corrosion and deterioration.

[0152] Embodiment 13

[0153] like Figures 1 to 8As shown, this embodiment is a further limitation of the above-mentioned embodiment twelve. The drain outlet in this embodiment is opened and closed by pulling out or rotating a plug; the pulling out or rotating of the plug is achieved manually or electrically, and the user can manually open the plug regularly or control the plug to open and close automatically through a program to achieve drainage in the water storage tank 215.

[0154] Embodiment 14

[0155] like Figures 10 to 12 As shown, this embodiment is a further limitation of the above-mentioned embodiments one to thirteen. In this embodiment, an adjustment component 302 is provided in the second air duct 3, and the adjustment component 302 is used to achieve connection or disconnection between the second air duct 3 and the accommodating chamber 1.

[0156] Embodiment 15

[0157] like Figures 10 to 12 As shown, this embodiment is a further limitation of the above-mentioned embodiment 14. The regulating assembly 302 in this embodiment includes a first regulating unit 303 and a second regulating unit 304; the first regulating unit 303 is arranged in the second air duct 3 to connect or disconnect the second air duct 3 with the accommodating chamber 1; the second regulating unit 304 is connected to the first regulating unit 303 to provide power for the first regulating unit 303 to connect or disconnect the second air duct 3 with the accommodating chamber 1; the second regulating unit 304 is connected to the first regulating unit 303 The second air duct 3 is connected to provide power for the first regulating unit 303, so as to realize the connection or disconnection between the second air duct 3 and the accommodating chamber 1, and an regulating mechanism capable of adjusting the size of the exhaust port is provided in the second air duct 3, so as to realize the adjustable size of the air outlet 208 area, thereby ensuring the temperature of the dishwasher during washing and saving energy, and reducing the risk of water backflowing from the second air duct 3 during washing and causing damage to the PTC heater; in the drying stage, the second air duct 3 can be opened through the mechanism, and the negative pressure of the accommodating chamber 1 can be used to make the airflow outside the second air duct 3 flow from the second air duct 3 into the interior of the accommodating chamber 1.

[0158] Embodiment 16

[0159] like Figures 10 to 12 As shown, this embodiment is a further limitation of the above-mentioned embodiment 14 or embodiment 15. In this embodiment, a slide is provided in the second air duct 3; the first adjustment unit 303 is provided in the slide, and moves linearly under the action of the second adjustment unit 304, thereby realizing the connection or disconnection between the second air duct 3 and the accommodating chamber 1; the area of ​​the second air duct 3 blocked by the first adjustment unit 303 is S1; the area of ​​the second air duct 3 is S2; the ratio of S1 to S2 is, 0 <S1 / S2≦1。

[0160] Embodiment 17

[0161] like Figures 10 to 12 As shown, this embodiment is a further limitation of the above-mentioned embodiment 14 or embodiment 15. In this embodiment, the first regulating unit 303 and the second regulating unit 304 are connected through a rotating shaft 305; the first regulating unit 303 rotates in the second air duct 3 under the action of the second regulating unit 304, thereby realizing the connection or disconnection between the second air duct 3 and the accommodating chamber 1; the rotating shaft 305 is arranged at a position close to one end surface of the first regulating unit 303 or at the rotation center; the area of ​​the second air duct 3 blocked by the first regulating unit 303 is S1; the area of ​​the second air duct 3 is S2; the ratio of S1 to S2 is, 0 <S1 / S2≦1。

[0162] Embodiment 18

[0163] 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 4 connected to the accommodating chamber 1. The steam generating component 4 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.

[0164] Among them, the steam generating component 4 includes a first connecting pipe 401, a second connecting pipe 402, a third connecting pipe 403, a power unit 404 and a heating unit 405; the first connecting pipe 401 is connected to the power unit 404; the third connecting pipe 403 is connected to the heating unit 405; the first connecting pipe 401 and the third connecting pipe 403 are respectively connected to the accommodating chamber 1; the second connecting pipe 402 connects the power unit 404 and the heating unit 405. The present invention realizes steam generation by utilizing water in the accommodating chamber 1 by setting a steam generating component 4 connected to the accommodating chamber 1, thereby generating steam to achieve cleaning of tableware and avoiding the problem of separate water introduction.

[0165] Furthermore, the water in the accommodating chamber 1, under the action of the power unit 404, passes through the first connecting pipe 401 and enters the power unit 404; after being pressurized in the power unit 404, the water enters the heating unit 405 through the second connecting pipe 402, and is heated to boil to high-temperature water vapor under the action of the heating unit 405; the high-temperature water vapor enters the accommodating chamber 1 after passing through the third connecting pipe 403, 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.

[0166] Furthermore, the temperature of the high-temperature water vapor is 100° C.; the first connecting pipe 401 and the third connecting pipe 403 are hoses; wherein the third connecting pipe 403 is a high-temperature resistant hose.

[0167] Embodiment 19

[0168] like Fig.13 As shown, this embodiment is a further limitation of the above-mentioned embodiment 18. 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.

[0169] Embodiment 20

[0170] like Fig.14 As shown, this embodiment is a further limitation of the above-mentioned embodiment 18 or embodiment 19. The method for using the steam generating assembly 4 in this embodiment includes the following steps:

[0171] S1. Startup process, turn on the startup power;

[0172] 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;

[0173] 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;

[0174] S4. Drying process, performing drying operation on the dishwasher.

[0175] Embodiment 21

[0176] like Fig.14 As shown, this embodiment is a further limitation of the above-mentioned embodiment 20. In the method for using the steam generating component 4 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 4 connected to the accommodating chamber 1.

[0177] Embodiment 22

[0178] like Fig.14 As shown, this embodiment is a further limitation of the above-mentioned embodiment 20 or embodiment 21. In the method for using the steam generating component 4 described in this embodiment, during the rinsing process of step S3, at least two water intake, rinsing and drainage operations are performed.

[0179] Embodiment 23

[0180] like Fig.14As shown, this embodiment is a further limitation of any one of the embodiments described in Embodiments 20 to 22 above. The method for using the steam generating component 4 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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 A first air duct (2) and a second air duct (3) communicated with the accommodating chamber (1) of the dishwasher; The first air duct (2) is provided with a fan unit (201); Under the action of the fan unit (201), the gas in the containing chamber (1) is discharged from the dishwasher through the first air duct (2); The gas outside the containing chamber (1) enters the containing chamber (1) from the second air duct (3); The first air duct (2) is also provided with an anti-backflow structure for preventing water or steam from flowing back along the air duct from the containing chamber (1); The first air duct (2) comprises an air inlet channel (203) which is at least partially in contact with the top wall of the accommodating chamber (1); the bottom wall of the air inlet channel (203) is provided with a first bottom surface (212) and a second bottom surface (213) having a height difference to form the anti-backflow structure, and the first bottom surface (212) is lower than the second bottom surface (213); the first bottom surface (212) is provided with an air inlet (207) of the air inlet channel (203), and the second bottom surface (213) is provided with an air outlet (208) of the air inlet channel (203); the air inlet (207) is arranged downwardly to communicate with the accommodating chamber (1).

2. The air duct structure of a dishwasher according to claim 1, characterized in that: Under the action of the fan unit (201), the gas in the accommodating chamber (1) has a tendency to be discharged from the accommodating chamber (1) along the first air duct (2) out of the dishwasher.

3. The air duct structure of a dishwasher according to claim 2, characterized in that: Under the effect of negative pressure formed in the accommodating chamber (1), air outside the accommodating chamber (1) enters the accommodating chamber (1) through the second air duct (3).

4. The air duct structure of a dishwasher according to claim 3, characterized in that: A heating unit (301) is also provided in the second air duct (3).

5. The air duct structure of a dishwasher according to claim 4, characterized in that: The heating unit (301) is arranged in a region formed in the air inlet direction of the second air duct (3); After the gas outside the containing chamber (1) passes through the second air duct (3), it forms a dry hot air flow under the action of the heating unit (301).

6. The air duct structure of a dishwasher according to claim 4, characterized in that: The heating surface formed by the heating unit (301) in the second air duct (3) at least covers the air flow area of ​​the cross section of the second air duct (3).

7. The air duct structure of a dishwasher according to claim 4, characterized in that: The heating unit (301) is a PTC heater arranged in the second air duct (3).

8. The air duct structure of a dishwasher according to claim 2, characterized in that: The fan unit (201) is a cross-flow fan arranged in the first air duct (2).

9. The air duct structure of a dishwasher according to claim 1, characterized in that: The first air duct (2) comprises an air inlet channel (204) and an air outlet channel (205), and the air inlet channel (203), the air inlet channel (204) and the air outlet channel (205) are connected in sequence; The air outlet channel (205) is provided with the fan unit (201); The air induction channel (204) is at least partially in contact with the outer wall of the accommodating chamber (1).

10. The air duct structure of a dishwasher according to claim 9, characterized in that: An arc-shaped transition structure (206) is provided at the connection between the air inlet channel (203) and the air induction channel (204), and at the connection between the air induction channel (204) and the air outlet channel (205); The arc-shaped transition structure (206) forms a tendency for the gas in the containing chamber (1) to be introduced from the air inlet channel (203) into the air induction channel (204) and the air outlet channel (205); The airflow generated by the fan unit (201) is introduced from the air inlet channel (203) into the air induction channel (204) and the air outlet channel (205).

11. The air duct structure of a dishwasher according to claim 9, characterized in that: The air duct (204) is formed on the outer wall of the accommodating chamber (1) and has a linear structure that facilitates the passage of air.

12. The air duct structure of a dishwasher according to claim 9, characterized in that: The cross-sectional area of ​​the air flow region in the air induction channel (204) is smaller than the cross-sectional area of ​​the air flow region in the air inlet channel (203).

13. The air duct structure of a dishwasher according to claim 9, characterized in that: The side wall of the air inlet channel (203) is arranged in an arc shape.

14. The air duct structure of a dishwasher according to claim 13, characterized in that: At least part of the arc-shaped side wall of the air inlet channel (203) is in a C-shaped structure.

15. The air duct structure of a dishwasher according to any one of claims 9 to 14, characterized in that: The air outlet (208) is in communication with the air induction channel (204).

16. The air duct structure of a dishwasher according to claim 15, characterized in that: The air flow area formed by the air inlet channel (203) gradually decreases from the air inlet (207) to the air outlet (208).

17. The air duct structure of a dishwasher according to any one of claims 1 to 14, characterized in that: The backflow prevention structure comprises a grille (209) arranged at the air inlet (207); A plurality of grid sheets (210) are arranged at intervals on the grid (209).

18. The air duct structure of a dishwasher according to claim 17, characterized in that: The grille (210) is capable of rotating around an axis, thereby adjusting the air outlet angle of the grille (210).

19. The air duct structure of a dishwasher according to claim 18, characterized in that: At least two of the grid plates (210) 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 (205) under the action of the grilles (210) with different angles and directions.

20. The air duct structure of a dishwasher according to claim 17, characterized in that: The grille (209) and the air inlet (207) are detachably connected.

21. The air duct structure of a dishwasher according to claim 20, characterized in that: The grille (209) is provided with claws at its periphery; The air inlet (207) is provided with a clamping groove corresponding to the clamping claw; The clamping claw cooperates with the clamping slot to achieve disassembly of the grille (209) and the air outlet (208).

22. The air duct structure of a dishwasher according to any one of claims 1 to 14, characterized in that: The backflow prevention structure comprises a switch portion (211) which is arranged in the air inlet channel (203) and is capable of opening or closing the air inlet channel (203).

23. The air duct structure of a dishwasher according to claim 22, characterized in that: The switch portion (211) opens or closes the air inlet channel (203) at least along the direction in which the airflow flows in the air inlet channel (203).

24. The air duct structure of a dishwasher according to claim 22, characterized in that: The switch part (211) is connected to a driving device; After receiving an opening or closing signal, the driving device drives the switch unit (211) to open or close the air inlet channel (203).

25. The air duct structure of a dishwasher according to claim 22, characterized in that: At least the outer edge of the switch portion (211) is wrapped with an elastic sealing structure; When the switch part (211) is closed, the sealing structure cooperates with the inner wall of the air inlet channel (203) to achieve sealing of the air inlet channel (203) by the switch part (211).

26. The air duct structure of a dishwasher according to any one of claims 1 to 14, characterized in that: The distance from the first bottom surface (212) to the top wall of the air outlet channel (205) is greater than the distance from the second bottom surface (213) to the top wall of the air outlet channel (205).

27. The air duct structure of a dishwasher according to claim 26, characterized in that: The backflow prevention structure comprises a water retaining rib (214) arranged on the second bottom surface (213); The water retaining rib (214) is arranged perpendicular to the flow direction of water or steam in the air inlet channel (203).

28. The air duct structure of a dishwasher according to any one of claims 9 to 14, characterized in that: The backflow prevention structure comprises a water storage tank (215) arranged at the bottom of the air induction channel (204).

29. The air duct structure of a dishwasher according to claim 28, characterized in that: The inner wall of the air induction channel (204) is formed with a structure for guiding the water or steam returning from the air inlet channel (203) to the water storage tank (215).

30. The air duct structure of a dishwasher according to claim 28, characterized in that: The lowest end of the water storage tank (215) is provided with a drainage outlet.

31. The air duct structure of a dishwasher according to claim 30, characterized in that: The drain outlet is opened and closed by pulling or rotating the plug.

32. The air duct structure of a dishwasher according to claim 31, characterized in that: The pulling or rotating of the plug body is achieved manually or electrically.

33. The air duct structure of a dishwasher according to claim 1, characterized in that: An adjustment component (302) is provided in the second air duct (3); The regulating component (302) is used to realize the connection or disconnection between the second air duct (3) and the accommodating chamber (1).

34. The air duct structure of a dishwasher according to claim 33, characterized in that: The adjustment component (302) comprises a first adjustment unit (303) and a second adjustment unit (304); The first regulating unit (303) is arranged in the second air duct (3) to connect or disconnect the second air duct (3) with the accommodating chamber (1); The second regulating unit (304) is connected to the first regulating unit (303) and provides power to the first regulating unit (303), thereby achieving connection or disconnection between the second air duct (3) and the accommodating chamber (1).

35. The air duct structure of a dishwasher according to claim 34, characterized in that: A slideway is provided in the second air duct (3); The first adjustment unit (303) is arranged in the slideway and moves in a straight line under the action of the second adjustment unit (304), thereby achieving connection or disconnection between the second air duct (3) and the accommodating chamber (1).

36. The air duct structure of a dishwasher according to claim 35, characterized in that: The area of ​​the second air duct (3) blocked by the first regulating unit (303) is S1; The area of ​​the second air duct (3) is S2; The ratio of S1 to S2 is 0 <S1 / S2≦1。 37. The air duct structure of a dishwasher according to claim 34, characterized in that: The first adjustment unit (303) and the second adjustment unit (304) are connected via a rotating shaft (305); Under the action of the second adjusting unit (304), the first adjusting unit (303) performs a rotational motion in the second air duct (3), thereby achieving connection or disconnection between the second air duct (3) and the accommodating chamber (1).

38. The air duct structure of a dishwasher according to claim 37, characterized in that: The rotation axis (305) is arranged at a position close to an end surface of the first adjustment unit (303) or at a rotation center.

39. The air duct structure of a dishwasher according to claim 37 or 38, characterized in that: The area of ​​the second air duct (3) blocked by the first regulating unit (303) is S1; The area of ​​the second air duct (3) is S2; The ratio of S1 to S2 is 0 <S1 / S2≦1。

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