CN210871418U - Air duct structure of dish washing machine - Google Patents

Abstract

The utility model discloses an air duct structure of a dish washing machine, which comprises an air duct communicated with a containing cavity of the dish washing machine; a fan unit, a heating unit, a flow guide structure and a backflow prevention structure are arranged in the air duct; the heating unit is used for heating the airflow generated by the fan unit to form dry hot air flowing into the accommodating chamber through the air flow; the flow guide structure guides the airflow flowing through the air channel and flowing in a disordered way into uniform airflow; the backflow prevention structure prevents water or steam in the accommodating chamber from flowing back into the air return duct. The utility model provides an air channel structure of a dish washing machine, which realizes the rapid passing of air flow and avoids loss by arranging the air channel structure with the area change of an air flow basin; meanwhile, a flow guide structure and a backflow prevention structure are arranged in the air duct, so that flow guide and backflow prevention are realized, and the PTC heater heats airflow flowing through the air duct; through adopting cross-flow fan, increased the amount of wind, reduced the noise, promoted user experience.

Description

Air duct structure of dish washing machine

Technical Field

The utility model belongs to the technical field of domestic appliance, specifically speaking relates to a wind channel structure of dish washer.

Background

With the improvement of living standard, the requirements of people on living quality are higher and higher, so that the requirements on the quality, the performance, the humanization of use, the intellectualization of operation and the like of products are higher and higher. The dish washing machine as an excellent product also gradually enters the life of people, is equipment for automatically cleaning dishes, chopsticks, plates, dishes, knives, forks and the like, and greatly facilitates the life of people. The tableware is usually required to be dried after being washed by the dish washing machine, in the existing dish washing machine, one part of the dish washing machine is not connected with an external drying system, water drops on the tableware are evaporated by means of the heat of the tableware, the drying of the tableware is realized, but the drying effect is poor; other dishwashers rely on external drying systems to accelerate the drying of the dishware by accelerating the flow of air in the dishwasher to carry away water vapor. However, the external drying system is designed to circulate the air in the dishwasher by means of a centrifugal fan to inject the dry air into the dishwasher or to extract the dry air from the dishwasher by means of water vapor (which corrodes the air machine for a long time). However, the flow direction and the watershed of the airflow entering the dishwasher are unstable, the air volume driven by the usually adopted centrifugal fan is limited, the air volume is increased by increasing the rotating speed of the fan, and the noise is very large, so that the user experience is seriously influenced.

Chinese patent application No. CN201720747062.8 discloses an exhaust system and a dishwasher including the same. The air exhaust system comprises a fan assembly, an air duct and an air outlet structure, wherein an outlet of the fan assembly is connected to an air inlet connecting portion of the air duct, the air outlet structure is connected to the air duct in a sliding mode, and at least part of the air outlet structure can be communicated with an air outlet of the air duct.

Chinese patent with application number CN201620180046.0 discloses a condensation exhaust pipe of dish washer, condensation drying device and dish washer of dish washer, wherein, the condensation exhaust pipe of dish washer is used for setting up between the inner door and the outer door of dish washer, it includes the pipeline body, the pipeline body has the condensation inner chamber, locate the condensation entry on condensation inner chamber top and locate the condensation export of condensation inner chamber bottom, the inner wall of condensation inner chamber includes the vertical wall of a plurality of vertical downwardly extending and the slope wall of a plurality of slope downwardly extending, each vertical wall sets up along vertical direction with each slope wall in turn.

Although the prior art discloses a technical scheme for exhausting air of a dish washer, a drying fan still has the defects of small air quantity and large noise; the problems of serious loss and low transmission efficiency of the air flow generated by the fan in the process of conveying the air flow to the accommodating chamber; water or steam in the inner container of the dish washer flows back along the air duct, so that the fan is corroded or mildewed and the like.

Therefore, the defects and shortcomings of the prior art need to be improved, and the air duct structure of the dish washing machine is provided, the air duct structure which is attached to the accommodating chamber of the dish washing machine and changes the area of the airflow basin in the air duct is arranged, so that the airflow can quickly enter the accommodating chamber through the air duct, the air volume loss is small, meanwhile, after passing through the air duct structure, the airflow with disordered flow direction is changed into airflow with uniform flow direction, the uniform airflow is uniformly dispersed into the accommodating chamber after passing through different grids at the air outlet of the air duct, and a structure for preventing water or steam in the accommodating chamber from flowing backwards along the air duct is arranged in the air duct, so that the service life of the whole device is ensured, and the mildew is prevented; in addition, the cross-flow fan is adopted, so that the air quantity is increased, the noise is reduced, and the user experience is improved; and the PTC heater is additionally arranged in the air duct to heat the air flow passing through the air duct, so that the internal environment of the washing machine is quickly dried, and meanwhile, the PTC heater is arranged at the installation position to enlarge the PTC heating action area, reduce the wind resistance and reduce the air volume loss of the air passing through the PTC heater.

In view of this, the present invention is provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the present invention is to overcome the deficiencies of the prior art, and to provide a dishwasher air duct structure capable of overcoming the above problems or at least partially solving the above problems.

In order to solve the technical problem, the utility model adopts the following basic concept: an air duct structure of a dish washer comprises

An air duct communicating with the accommodating chamber of the dishwasher;

a fan unit, a heating unit, a flow guide structure and a backflow prevention structure are arranged in the air duct;

the heating unit is used for heating the airflow generated by the fan unit to form dry hot air flowing into the accommodating chamber through the air inlet channel;

the flow guide structure guides the airflow flowing through the air channel and flowing in a disordered way into uniform airflow;

the backflow prevention structure prevents water or steam in the accommodating chamber from flowing back into the air return duct.

Wherein the air duct comprises

The air inlet channel, the air inducing channel and the air outlet channel are communicated with the accommodating cavity and are sequentially connected;

the air inlet channel is provided with a fan unit and a heating unit;

the air inducing channel is at least partially attached to the outer wall of the accommodating chamber;

the air outlet channel is at least partially attached to the top wall of the accommodating chamber and is at least communicated with the accommodating chamber;

in one embodiment, the heating unit is arranged in an air inlet direction of the fan unit and in an area formed inside the air inlet channel, and the heating unit is additionally arranged in the air channel to heat the air flow flowing through the air channel, so that the internal environment of the washing machine is quickly dried;

in one embodiment, the device further comprises a conversion piece connected with the air inlet channel and the heating unit;

the heating unit is arranged in the conversion piece;

in one embodiment, the conversion piece and the air inlet channel are sealed by a sealing glue;

in one embodiment, the fan unit is a cross-flow fan arranged in the air inlet channel, a large amount of drying air sources are provided by arranging the cross-flow fan in the air inlet channel, and meanwhile, the cross-flow fan is low in noise during operation, the influence on the surrounding environment of the dishwasher is reduced, and a more comfortable environment is provided for a user;

in one embodiment, the heating unit is a PTC heater disposed within the air intake channel.

In addition, the connection parts of the air inlet channel and the air inducing channel and the connection parts of the air inducing channel and the air outlet channel are provided with arc-shaped transition structures;

the arc-shaped transition structure forms a trend of introducing airflow generated by the fan unit into the induced air channel and the air outlet channel from the air inlet channel, and the arc-shaped transition structure is arranged at the air channel exchange position, namely the change position of the airflow domain area in the air channel, so that the flowing airflow can be guided by the arc-shaped transition structure to change the flow direction, the rigid contact between the airflow flow direction and the inner wall of the air channel is avoided, and the loss of the airflow is greatly reduced while the airflow rapidly passes through the transition structure;

in one embodiment, the air duct formed on the outer wall of the accommodating chamber by the air inducing channel is of a linear structure convenient for air flow to pass through, and the linear air duct structure is convenient for air flow to pass through quickly, so that air volume loss caused by an air duct with too many arc or bend angles is avoided;

in one embodiment, the cross-sectional area of the airflow domains in the air inducing channel is smaller than that of the airflow domains in the air inlet channel, the area difference of the airflow domains of the two air channels is favorable for accelerating the airflow in the flowing process, and when the airflow enters the air channel with the small-area domain from the air channel with the large-area domain, higher transmission speed is obtained, the airflow rapidly passes through the air channel with the small-area domain, so that the transmission efficiency of the airflow in the air channel is improved, and the loss of the air volume is avoided.

Meanwhile, the air outlet channel comprises an air inlet and an air outlet;

the air inlet is communicated with the air inducing channel;

the air outlet is communicated with the accommodating chamber;

in one embodiment, the air outlet channel gradually increases the area of the airflow flowing area from the air inlet to one side of the air outlet, and the area of the airflow flowing through the airflow flowing area from the air inlet to the air outlet continuously increases, so that the airflow is decelerated, the guiding plate and the air outlet channel can guide the flowing airflow, and the airflow with disordered flowing area is changed into the airflow with stable and uniform flowing area.

Furthermore, a first bottom surface and a second bottom surface are arranged on the bottom wall of the air outlet channel;

the first bottom surface is provided with the air inlet;

the second bottom surface is provided with the air outlet;

in one embodiment, a height difference is formed between the first bottom surface and the second bottom surface, and the height difference enables airflow flowing from the induced air channel to have a tendency of flowing into the accommodating cavity when flowing through the air outlet channel, so that the airflow flowing efficiency is improved, and the loss of the airflow in the air duct is avoided;

in one embodiment, when the airflow generated by the fan unit flows in the air outlet channel along one side of the air inlet to one side of the air outlet, the height difference between the first bottom surface and the second bottom surface forms the flow guide structure, and the height difference enables the flowing airflow to form a downward flowing trend, so that the trend of the airflow flowing from the top of the accommodating chamber to the inside of the accommodating chamber is enhanced;

when water or steam in the accommodating chamber flows to one side of the air inlet along one side of the air outlet in the air outlet channel, the height difference between the first bottom surface and the second bottom surface forms the backflow prevention structure, so that the flow track of the water or the steam flowing back from the accommodating chamber is changed due to the height difference, and the flowability of the water or the steam is reduced;

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;

in one embodiment, the side wall of the air outlet channel is arc-shaped and is matched with the guide plate to form a structure for adjusting the air flow flowing through;

in one embodiment, the arc-shaped side wall of the air outlet channel is at least partially in a C-shaped structure, and the air channel at the top of the accommodating chamber is set to be in an approximately C-shaped arc-shaped structure, so that the damage or corrosion of the cross flow fan caused by water or steam flowing back from the air channel in the working process of the dishwasher is avoided.

Furthermore, the flow guide structure comprises a plurality of guide plates which are arranged on the bottom wall of the air outlet channel at intervals, and the guide plates guide the turbulent airflow flowing through the flow field into the stable and uniform airflow in the flow field;

the guide plate guides the airflow flowing through the air outlet channel from the air inlet to the air outlet;

in one embodiment, the guide plate is arranged in an arc shape;

forming a trend that the airflow flows from the air inlet to the air outlet;

in one embodiment, the radian of the guide plate is the same as that of the side wall of the air outlet channel, and the guide plate with the radian of the side wall of the air duct is the same as that of the side wall of the air duct, so that the guiding effect on the airflow flowing in the air duct is enhanced, and the airflow passes through the guide plate and is changed from turbulent airflow into airflow with uniform flow direction;

in one embodiment, the guide plate is at least partially disposed on the first bottom surface.

Still further, the backflow prevention structure comprises a water retaining rib arranged on the first bottom surface;

the water retaining ribs are perpendicular to the flowing direction of water or steam in the air outlet channel, and the water retaining ribs further block the water or steam flowing in the air outlet channel.

A grille is arranged at the air outlet of the air outlet channel;

a plurality of grid pieces are arranged on the grid at intervals;

in one embodiment, the grid can rotate around a shaft, so that the air outlet angle of the grid is adjusted;

in one embodiment, at least two of the grids are rotated around the shaft at different angles and directions;

when the airflow generated by the fan unit flows to one side of the air outlet along one side of the air inlet in the air outlet channel, the airflow in the air outlet channel enters the accommodating cavity in different angles and directions under the guidance of the grid pieces with at least two different angles and directions, the adjustment of different angles meets the requirements of customers on washing at different angles, and the grid with adjustable orientation is arranged at the air outlet of the air channel;

when the water or the steam in the accommodating chamber flows to one side of the air inlet along one side of the air outlet in the air outlet channel, at least part of the water or the steam in the accommodating chamber is blocked outside the air outlet channel under the action of the grating sheets with different angles and directions, and the air outlet of the air duct is provided with a grating with adjustable direction;

in one embodiment, the grille is detachably connected with the air outlet;

in one embodiment, the grid is provided with claws at its periphery;

the air outlet is provided with a clamping groove corresponding to the clamping jaw;

the jack catch with the draw-in groove cooperation realizes the grid with the dismantlement of air outlet, the user of being convenient for is to the washing and the maintenance of grid.

Moreover, the backflow preventing structure comprises a switch part which is arranged in the air outlet channel and can open or close the air outlet channel;

in one embodiment, the switch part opens or closes the wind outlet channel at least along the direction of the airflow flowing in the wind outlet channel;

in one embodiment, the switch part is connected with a driving device;

after the driving device receives the opening or closing signal, the switching part is driven to open or close the air outlet channel;

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

when the switch part is closed, the sealing structure is matched with the inner wall of the air outlet channel, and the switch part seals the air outlet channel.

In addition, the backflow preventing structure also comprises a water storage tank arranged at the bottom of the induced draft channel, and the water storage tank enables residual water in the air channel to be hit and stored at one position;

in one embodiment, the inner wall of the induced air channel is formed with a structure for guiding water or steam flowing back from the air outlet channel to the water storage tank, so that residual steam can be guided to the water storage tank after the inner wall of the air channel is liquefied;

in one embodiment, the lowest end of the water storage tank is provided with a water outlet, so that the corrosion and deterioration caused by the fact that washing water is left in the air channel for a long time after water or steam in the accommodating chamber flows back along the air channel are avoided;

in one embodiment, the water outlet is opened and closed by a plug body which is pulled or rotated;

in one embodiment, the withdrawal or rotation of the plug body is achieved manually or electrically.

After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has:

1. the utility model realizes that the air flow enters the accommodating cavity quickly through the air channel and the air quantity loss is small by arranging the air channel structure which is attached to the accommodating cavity of the dish-washing machine and changes the area of the airflow basin in the air channel;

2. the flow guiding structure is arranged in the air duct, so that the turbulent air flowing through the air duct is guided, the flow field of the guided air flow is stable and uniform, and the air flow passes through the grids arranged at the air outlet of the air duct and facing different angles and is uniformly dispersed into the accommodating cavity; meanwhile, a backflow preventing structure is arranged in the air duct, so that the situation that water or steam in the accommodating chamber flows back along the air duct to cause damage of the fan unit or remains in the air duct to cause corrosion and mildew is avoided;

3. the transition structure is arranged at the area change part of the air duct basin, so that the flowing air flow can be guided by the arc transition structure to change the flow direction, the rigid contact between the air flow direction and the inner wall of the air duct is avoided, and the loss of air volume is greatly reduced while the air flow passes through the transition structure quickly;

4. the air flow is guided uniformly in the air channel rapidly and is sent into the containing chamber in an accelerating way, and meanwhile, the effect of multiple superposition and backflow prevention of flowing water or steam is formed, so that the situation that water or steam in the containing chamber flows backwards along the air channel to cause damage of a fan unit or remains in the air channel to cause corrosion and mildew is further avoided;

5. the direction-adjustable grille is arranged at the air outlet of the air duct, and further, the grille can face at least two different directions in the adjusting process, so that the effect of uniform flow direction in the process that air flow enters the accommodating chamber through the air duct is ensured; meanwhile, primary shielding that water or steam in the accommodating chamber enters the air channel is realized, and the occurrence probability of backflow of the water or the steam along the air channel is reduced;

6. the air duct at the top of the containing chamber is set to be of an approximately C-shaped arc structure, so that the damage or corrosion of the cross-flow fan caused by water or steam flowing back from the air duct in the working process of the dish washing machine is avoided;

7. the cross-flow fan is arranged in the air inlet channel, a large amount of drying air sources are provided, and meanwhile, the noise is low during the operation of the cross-flow fan, so that the influence on the surrounding environment of the dish washing machine is reduced, and a more comfortable environment is provided for users;

8. the PTC heater is additionally arranged in the air duct, so that the air flow passing through the air duct is heated, the rapid drying of the internal environment of the washing machine is realized, meanwhile, the PTC heater is arranged at the installation position, the PTC heating action area is enlarged, the wind resistance can be reduced, and the air volume loss of the air passing through the PTC heater is reduced.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In the drawings:

FIG. 1 is a first schematic view of the whole assembly of the air duct structure of the dishwasher of the present invention;

FIG. 2 is a second schematic view of the whole assembly of the air duct structure of the dishwasher of the present invention;

fig. 3 is a first schematic view of the air duct structure of the present invention;

fig. 4 is a second schematic view of the air duct structure of the present invention;

FIG. 5 is a schematic view of a fan unit of the present invention;

fig. 6 is a first schematic view of the air outlet channel of the present invention;

fig. 7 is a second schematic view of the air outlet channel of the present invention;

fig. 8 is a third schematic view of the air outlet channel of the present invention;

fig. 9 is a fourth schematic view of the air outlet channel of the present invention;

FIG. 10 is a schematic view of the air exhaust channel of the present invention;

figure 11 is a first schematic view of the conditioning assembly passage of the present invention;

figure 12 is a second schematic view of the conditioning assembly passage of the present invention;

FIG. 13 is a schematic view of a steam generating assembly of the present invention;

fig. 14 is a logic diagram of the flow of the steam generating assembly of the present invention.

In the figure: 1. a housing chamber; 2. an air inlet channel; 201. a fan unit; 202. a heating unit; 3. an induced draft channel; 301. a water storage tank; 4. an air outlet channel; 401. an air inlet; 402. an air outlet; 403. a first bottom surface; 404. a second bottom surface; 405. a guide plate; 406. a grid; 407. a grid sheet; 408. a switch section; 409. water retaining ribs; 6. a transition structure; 8. an air exhaust channel; 801. An adjustment assembly; 802. a first adjusting unit; 803. a second adjusting unit; 804. a rotating shaft; 9. a steam generating assembly; 901. A first connecting pipe; 902. a second connecting pipe; 903. a third connecting pipe; 904. a power section; 905. a heating section; 10. a conversion member.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The dishwasher is used in daily life, for example, the drying fan has small air volume and large noise; the problems of serious loss and low transmission efficiency of the air flow generated by the fan in the process of conveying the air flow to the accommodating chamber 1; water or steam in the inner container of the dish-washing machine flows back along the air duct to cause the fan to be corroded or to go moldy; meanwhile, the tableware residues are not thoroughly cleaned, and the steam washing can only realize the cleaning of the tableware, only can perform partial sterilization, and cannot realize large-range sterilization; simultaneously to viscosity great or by with place for a long time not abluent tableware, the water under high pressure also can not effectively wash to steam is washed and is set up the inlet channel alone usually, and the structure is loaded down with trivial details and extravagant resource, to above-mentioned technical problem, the utility model discloses launch following technical scheme.

Fig. 1 and fig. 2 are the first and the second schematic diagrams of the whole assembly of the air duct structure of the dishwasher of the present invention, mainly showing the assembly position relationship between the accommodating chamber 1 and the air duct, as can be seen from fig. 1 and fig. 2, the air duct of the present invention comprises an air inlet channel 2, an induced air channel 3 and an air outlet channel 4, the air inlet channel 2 is externally provided with a fan unit 201, the arrangement of the fan unit 201 and the air inlet channel 2 further comprises a converter 10, a heating unit 202 is installed in the converter 10, of course, in the setting process, the heating unit 202 and the converter 10 can be omitted according to actual needs, which is only an embodiment of the present invention; further, air inlet channel 2 sets up in the bottom that holds cavity 1, and induced air passageway 3 hugs closely with the lateral wall that holds cavity 1, and air-out passageway 4 then hugs closely with the top that holds cavity 1, and air-out passageway 4 sets up to the arc structure of approximate C type simultaneously, and the air current that fan unit 201 produced gets into in holding cavity 1 after passing through air inlet channel 2, induced air passageway 3 and air-out passageway 4.

Fig. 3 to 5 are schematic diagrams of the first and second schematic diagrams and the fan unit 201 of the air duct structure of the present invention, as can be seen from fig. 3 to 5, the air duct includes an air inlet channel 2, an air inducing channel 3, an air outlet channel 4, and meanwhile, the fan unit 201 is connected with the converting piece 10 and the air inlet channel 2, a heating unit 202 is disposed in the converting piece 10, when the converting piece 10 is connected with the air inlet channel 2, a sealant is injected, so as to realize complete sealing and fixing of the converting piece 10 and the air inlet channel 2, and the converting piece and the fan unit 201 are connected through a detachable thread structure; in addition, in the process of air duct conversion, an arc-shaped transition structure 6 is further arranged, and the transition structure 6 is arranged at the area change position of the air duct basin, so that the flowing air flow can be converted in the flow direction under the guidance of the arc-shaped transition structure 6, the rigid contact between the air flow direction and the inner wall of the air duct is avoided, and the air volume loss is greatly reduced while the air flow passes through the air duct quickly; furthermore, a water storage tank 301 is further arranged at the induced air channel 3, a structure for guiding the water or steam flowing back from the air outlet channel 4 to the water storage tank 301 is formed on the inner wall of the induced air channel 3, and the structure of the inner wall of the induced air channel 3 can be understood as a structure inclined towards the water storage tank 301, and the steam attached to the inner wall of the induced air channel 3 is converged into the water storage tank 301 under the action of the inclined inner wall.

Fig. 6 to 9 are schematic diagrams of the first, second, third and fourth air outlet channels 4 of the present invention, and it can be seen from the drawings that the air outlet channel 4 is an arc structure similar to C, an air inlet 401 communicated with the induced air channel 3 and an air outlet 402 communicated with the accommodating chamber 1 are arranged in the air outlet channel 4, and a water retaining rib 409, a guide plate 405, and a first bottom surface 403 and a second bottom surface 404 having a height difference are further arranged in the air outlet channel 4; the guide plate 405 is also of an arc-shaped structure, and has the same radian as the arc-shaped side wall of the air outlet channel 4, so that the air flow in the air outlet channel 4 is guided, and simultaneously, the backflow of water or steam in the accommodating chamber 1 is avoided, the water or steam in the accommodating chamber 1 is effectively blocked outside the drainage air duct under the action of the arc-shaped side wall of the air outlet channel 4, the guide plate 405, the height difference between the first bottom surface 403 and the second bottom surface 404, and the water blocking ribs 409, so that the water or steam is prevented from flowing to the fan unit 201 along the drainage air duct, and the fan unit 201 is prevented from being damaged; in addition, a grille 406 is arranged at the air outlet 402 of the air outlet channel 4; a plurality of grid sheets 407 are arranged on the grid 406 at intervals; furthermore, the grid sheets 407 can rotate around a shaft, and the angles and directions of the rotation of at least two grid sheets 407 around the shaft are different, so as to adjust the air outlet angle of the grid sheets 407; furthermore, the grille 406 is detachably connected with the air outlet 402, the periphery of the grille 406 is provided with a clamping jaw, and the air outlet 402 is provided with a clamping slot corresponding to the clamping jaw; the claws are matched with the clamping grooves, so that the grating 406 and the air outlet 402 are detached, and the grating 406 is convenient to clean and maintain by a user.

Fig. 10 to fig. 12 are the first and the second schematic diagrams of the air exhaust channel 8 and the adjusting component 801 channel of the present invention, and it can be seen from the drawings that the present invention sets the adjusting component 801 capable of connecting or disconnecting the air exhaust channel 8 on the air exhaust channel 8, and sets the adjusting mechanism capable of adjusting the size of the air outlet on the air exhaust channel 8, so as to realize the size adjustment of the area of the air outlet 402, thereby ensuring the temperature of the dishwasher during washing, saving energy, and reducing the risk of water being discharged from the air exhaust channel to the outside during washing; in the drying stage, the opening of the air port can be realized through a mechanism, the air discharge is accelerated, and the drying is rapid; and simultaneously, the utility model discloses an adjusting part 801 has adopted two kinds of technical scheme, can horizontal migration and upset rotation, and the shape of air exhaust passageway 8 can multiple change, though only be the air exhaust passageway 8 of rectangle in figure 11 and figure 12, but can adjust according to actual conditions and needs, the setting of going on to adjustment mechanism's operation model and air exhaust passageway 8's shape, aim at strengthens adjustment mechanism's adaptability, and different dish washer models, the adaptability of different shapes air exhaust passageway 8, simultaneously through adjustment mechanism to air exhaust passageway 8's regulation, the demand of different gears air exhaust and the different stoving circumstances has been satisfied.

Fig. 13 is a schematic view of the steam generating assembly 9 of the present invention, in which the accommodating chamber 1 is connected to the steam generating assembly 9, and the steam generating assembly 9 connected to the accommodating chamber 1 is provided to generate steam by using water in the accommodating chamber 1, so as to clean tableware and avoid the problem of water diversion; by converting water in the accommodating chamber 1 into high-temperature water vapor, the temperature of the chamber is quickly raised in a short time, and the effects of sterilizing and removing stains on tableware are effectively achieved.

Fig. 14 is a logic diagram of the flow of the steam generating assembly 9, in fig. 14, in the pre-washing process of step S2, before the pre-washing operation, the steam washing operation is performed on the dishwasher, the steam used in the steam washing operation comes from, the steam generating assembly 9 communicated with the accommodating chamber 1, in the pre-washing before the dishwasher is cleaned, the steam generator assembly communicated with the accommodating chamber 1 is used to generate high-temperature steam, and the steam is conveyed into the accommodating chamber 1 of the dishwasher, so that the temperature in the accommodating chamber 1 can be quickly raised, the humidity and the high temperature of the steam can effectively play a role in softening residues with higher viscosity or hardness, and then the cleaning of stubborn stains on the dishware can be easily realized by using high-pressure water.

Based on the above descriptions of fig. 1 to 14, the technical solution of the present invention is applied to the specific embodiments as follows.

Example one

As shown in fig. 1 and 2, the air duct structure of the dishwasher according to the present embodiment includes an air duct communicating with a receiving chamber 1 of the dishwasher; a fan unit 201, a heating unit 202, a flow guide structure and a backflow prevention structure are arranged in the air duct; the heating unit 202 is configured to heat the airflow generated by the fan unit 201 to form dry hot air flowing into the accommodating chamber 1 through the air inlet channel 2; the flow guide structure guides the airflow flowing through the air channel and flowing in a disordered way into uniform airflow; the backflow prevention structure prevents water or steam in the accommodating chamber 1 from flowing back into the air return duct.

The utility model realizes that the air flow enters the accommodating chamber 1 quickly through the air channel and the air quantity loss is small by arranging the air channel structure which is attached to the accommodating chamber 1 of the dish-washing machine and changes the area of the airflow basin in the air channel; the flow guiding structure is arranged in the air duct, so that the turbulent air flowing through the air duct is guided, the flow field of the guided air flow is stable and uniform, and the air flow passes through the grids 406 arranged at the air outlet 402 of the air duct and facing different angles and is uniformly dispersed into the accommodating chamber 1; through set up the structure of preventing flowing backwards in the wind channel, avoided holding water or steam in the cavity 1 and flowing backwards along the wind channel, caused the damage of fan unit 201, perhaps remain and cause the condition emergence of corruption, moldy in the wind channel.

Example two

As shown in fig. 3 to 5, the present embodiment is further limited to the first embodiment, in which the air duct includes an air inlet channel 2, an air inducing channel 3, and an air outlet channel 4, which are communicated with the accommodating chamber 1 and are sequentially connected to each other; the air inlet channel 2 is provided with a fan unit 201 and a heating unit 202; the air inducing channel 3 is at least partially attached to the outer wall of the accommodating chamber 1; the air outlet channel 4 is at least partially attached to the top wall of the accommodating chamber 1 and is at least communicated with the accommodating chamber 1; further, the heating unit 202 is disposed in the air inlet direction of the fan unit 201 and the area formed inside the air inlet channel 2, and the air flowing through the air channel is heated by adding the heating unit 202 in the air channel, so as to achieve rapid drying of the internal environment of the washing machine.

EXAMPLE III

As shown in fig. 3 to 5, this embodiment is further limited to the first embodiment or the second embodiment, in this embodiment, the fan unit 201 is a cross flow fan disposed in the air intake channel 2, and by disposing the cross flow fan in the air intake channel 2, a large amount of dry air sources are provided, and meanwhile, the noise of the cross flow fan during operation is low, so that the influence on the environment around the dishwasher is reduced, and a more comfortable environment is provided for the user; further, the heating unit 202 is a PTC heater arranged in the air inlet channel 2, and heats the air flowing through the air channel by adding the PTC heater in the air channel, so as to realize the rapid drying of the internal environment of the washing machine.

Example four

As shown in fig. 3 to 5, this embodiment is a further limitation of any one of the first to third embodiments, in this embodiment, an arc-shaped transition structure 6 is disposed at a connection between the air inlet channel 2 and the air inducing channel 3, and at a connection between the air inducing channel 3 and the air outlet channel 4; the arc-shaped transition structure 6 forms a trend of introducing the airflow generated by the fan unit 201 from the air inlet channel 2 into the air inducing channel 3 and the air outlet channel 4, and the arc-shaped transition structure 6 is arranged at the air channel exchange position, namely the change position of the airflow domain area in the air channel, so that the flowing airflow can be guided by the arc-shaped transition structure 6 to change the flow direction, the rigid contact between the airflow flow direction and the inner wall of the air channel is avoided, and the loss of the airflow is greatly reduced while the airflow rapidly passes through the air channel; the air channel formed on the outer wall of the accommodating chamber 1 by the air inducing channel 3 is of a linear structure convenient for air flow to pass through, and the linear air channel structure is convenient for air flow to pass through quickly, so that air volume loss caused by an air channel with too much arc or bend angle is avoided; the cross-sectional area of the airflow basin in the air inducing channel 3 is smaller than that of the airflow basin in the air inlet channel 2, the area difference of the airflow basins of the two air channels is beneficial to acceleration of airflow in the flowing process, and when the airflow enters the air channel of the small-area basin from the air channel of the large-area basin, higher transfer speed is obtained, the airflow quickly passes through the air channel of the small-area basin, so that the transfer efficiency of the airflow in the air channel is improved, and the loss of air volume is avoided.

EXAMPLE five

As shown in fig. 6 to 9, the present embodiment is further defined by the first to fourth embodiments, and the air outlet channel 4 of the present embodiment includes an air inlet 401 and an air outlet 402; the air inlet 401 is communicated with the induced air channel 3; the air outlet 402 is communicated with the accommodating chamber 1, air flow generated by the fan unit 201 enters the air outlet channel 4 from the air inlet 401 after passing through the air inlet channel 2 and the air inducing channel 3, and is changed from turbulent air flow to uniform air flow under the action of a flow guide structure of a guide plate 405 and the like in the air outlet channel 4, and finally enters the accommodating chamber 1 from the air outlet 402.

EXAMPLE six

As shown in fig. 6 to 9, this embodiment is further limited to the fifth embodiment, in this embodiment, the air outlet channel 4 gradually increases the area of the flow field of the airflow from the air inlet 401 to the air outlet 402, and the area of the flow field from the air inlet 401 to the air outlet 402 continuously increases, when the airflow passes through this area, the airflow rapidly flows from the drainage channel, and becomes slow along with the expansion of the area of the flow field, which is favorable for the deceleration of the airflow, so that the guide plate 405 and the air outlet channel 4 guide the airflow flowing through, and the airflow with turbulent flow field becomes a smooth and uniform flow field.

EXAMPLE seven

As shown in fig. 6 to 9, the present embodiment is further limited to the fifth embodiment or the sixth embodiment, in which a first bottom surface 403 and a second bottom surface 404 are disposed on a 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 a distance from the first bottom surface 403 to the top wall of the air outlet channel 4 is smaller than a 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 induced air channel 3 to have a tendency of flowing into the accommodating chamber 1 when flowing through the air outlet channel 4, so that the airflow flowing efficiency is improved, and the loss of the airflow in the air duct is avoided; meanwhile, when 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, and further play a role in blocking.

Example eight

As shown in fig. 6 to 9, in this embodiment, as further defined by the seventh embodiment, when the airflow generated by the fan unit 201 flows along the side of the air inlet 401 to the side of the air outlet 402 in the air outlet channel 4, the height difference between the first bottom surface 403 and the second bottom surface 404 forms the flow guiding structure, and the height difference makes the flowing airflow form a downward flowing trend, which enhances the trend of the airflow flowing from the top of the accommodating chamber 1 to the accommodating chamber 1; further, when the water or the steam in the accommodating chamber 1 flows along the air outlet 402 side toward the air inlet 401 side in the air outlet channel 4, the height difference between the first bottom surface 403 and the second bottom surface 404 forms the backflow prevention structure, and the height difference changes the flow trajectory of the water or the steam flowing back from the accommodating chamber 1, thereby reducing the fluidity of the water or the steam.

Change through wind channel airflow basin and air outlet 402 department set up two planes of height difference, form the multiple stack to the effect that the air current that flows through accelerates, it is even by the water conservancy diversion in the wind channel to have guaranteed that the air current is quick, and send into with higher speed and hold in the cavity 1, form the multiple stack to the water or the steam that flow through simultaneously, the effect of preventing the refluence, water or steam along the wind channel refluence in further having avoided holding the cavity 1, cause the damage of fan unit 201, perhaps remain and cause the corruption in the wind channel, the moldy condition takes place.

Example nine

As shown in fig. 6 to 9, this embodiment is a further limitation of any one of the first to eighth embodiments, in which the side wall of the air outlet channel 4 is disposed in an arc shape, and cooperates with the guide plate 405 to form a structure for adjusting the air flow passing through; the arc-shaped side wall of the air outlet channel 4 is at least partially of a C-shaped structure, and the air channel shape at the top of the accommodating chamber 1 is set to be of an approximate C-shaped arc-shaped structure, so that the problem that water or steam flows back from the air channel to cause damage or corrosion of the cross-flow fan in the working process of the dish washing machine is avoided.

Example ten

As shown in fig. 6 to 9, the present embodiment is further limited to any one of the first to ninth embodiments, the flow guiding structure of the present embodiment includes a plurality of guiding plates 405 disposed at intervals on the bottom wall of the air outlet channel 4, and the guiding plates 405 guide the turbulent airflow flowing through the flow field to form a smooth and uniform airflow flow field; the guide plate 405 guides the airflow flowing through the air outlet channel 4 from the air inlet 401 to the air outlet 402; further, the guide plate 405 is disposed in an arc shape, so as to form a trend that the airflow flows from the air inlet 401 to the air outlet 402; furthermore, the radian of the guide plate 405 is the same as that of the side wall of the air outlet channel 4, and the guide plate 405 with the radian of the side wall of the air duct is the same as that of the side wall of the air duct, so that the guiding effect on the air flow in the air duct is enhanced, and the air flow passes through the guide plate 405 and is changed from the turbulent air flow into the air flow with uniform flow direction; the guide plate 405 is at least partially disposed on the first bottom surface 403.

EXAMPLE eleven

As shown in fig. 6 to 9, the present embodiment is further defined by any one of the first to tenth embodiments, in which the backflow preventing structure of the air duct structure of the dishwasher of the present embodiment includes a water blocking rib 409 disposed on the first bottom surface 403; the water blocking rib 409 is perpendicular to the flowing direction of water or steam in the air outlet channel 4, and the water blocking rib 409 further blocks the water or steam flowing in the air outlet channel 4.

As can be seen from fig. 6 to 9, a grille 406 is further disposed at the air outlet 402 of the air outlet channel 4, and a plurality of grille plates 407 are disposed on the grille 406 at intervals; the grid sheets 407 can rotate around a shaft, and the angles and directions of the rotation of at least two grid sheets 407 around the shaft are different, so as to adjust the air outlet angle of the grid sheets 407;

when the airflow generated by the fan unit 201 flows from the air outlet channel 4 to the air outlet 402 along one side of the air inlet 401, the airflow in the air outlet channel 4 enters the accommodating chamber 1 at different angles and directions under the guidance of the grating sheets 407 with at least two different angles and directions, and the adjustment of the different angles meets the requirement of a customer on washing at different angles, and the grating 406 with adjustable orientation is arranged at the air outlet 402 of the air duct, and further, the grating 406 can face at least two different directions in the adjustment process, so that the uniform flow effect is ensured in the process that the airflow enters the accommodating chamber 1 through the air duct;

when water or steam in the accommodation chamber 1 is in the air-out passageway 4, follow air outlet 402 lateral direction when air intake 401 one side flows, water or steam in the accommodation chamber 1, different at angle and direction under the grid piece 407 effect, at least part is blockked in outside air-out passageway 4, set up towards adjustable grid 406 in wind channel air outlet 402 department, further, grid 406 is at the in-process of adjustment, can face two different directions at least, has realized accommodating the first sheltering from of water or steam entering wind channel in the chamber 1, has reduced the condition emergence probability of water or steam along the wind channel refluence.

Example twelve

As shown in fig. 3 to 9, this embodiment is a further limitation of any one of the first to eleventh embodiments, in which the grill 406 and the air outlet 402 are detachably connected to each other; the periphery of the grating 406 is provided with claws; the air outlet 402 is provided with a clamping groove corresponding to the clamping jaw; the claws are matched with the clamping grooves, so that the grating 406 and the air outlet 402 are detached, and the grating 406 is convenient to clean and maintain by a user.

Particularly, during the wind channel assembly, a plurality of jack catch of evenly distributed all around of grid 406, air-out passageway 4 with hold cavity 1, through the jack catch with hold cavity 1 and correspond the draw-in groove cooperation that the jack catch set up all around, realize fixedly, air-out passageway 4 arcwall face with hold the laminating of cavity 1, air inlet passageway 2 with hold the laminating in the bottom outside of cavity 1.

EXAMPLE thirteen

As shown in fig. 3 to 9, the present embodiment is further defined by any one of the first to twelfth embodiments, and the backflow preventing structure of the present embodiment includes a switch portion 408 disposed in the air outlet channel 4 and capable of opening or closing the air outlet channel 4; the switch 408 opens or closes the air outlet channel 4 at least along the direction of the air flow flowing in the air outlet channel 4; further, a driving device is connected to the switch 408; after the driving device receives the opening or closing signal, the switching part 408 is driven to open or close the air outlet channel 4; furthermore, at least the outer edge of the switch part 408 is wrapped with an elastic sealing structure, and the sealing structure ensures the sealing effect of the air outlet channel 4 when the switch part 408 is in a closed state; when the switch portion 408 is closed, the sealing structure is matched with the inner wall of the air outlet channel 4, and the switch portion 408 seals the air outlet channel 4.

Example fourteen

As shown in fig. 4, this embodiment is a further limitation of any one of the first to thirteenth embodiments, and the backflow preventing structure of this embodiment further includes a water storage tank 301 disposed at the bottom of the air inducing channel 3, and the water storage tank 301 enables residual water along the air duct to be hit and stored at one place; the inner wall of the air inducing channel 3 is provided with a structure for guiding the water or steam flowing back from the air outlet channel 4 to the water storage tank 301, so that the residual steam can be guided to the water storage tank 301 after being liquefied on the inner wall of the air channel; the lowest end of the water storage tank 301 is provided with a water outlet, so that the phenomenon that washing water is remained in the air channel for a long time to cause corrosion and deterioration after water or steam in the accommodating chamber 1 flows back along the air channel is avoided; the water outlet is opened and closed through a plug body which is pulled or rotated; the pulling or rotation of the plug body is realized manually or electrically.

Example fifteen

As shown in fig. 10 to 12, this embodiment is further defined by any one of the first to fourteenth embodiments, and the air duct structure of the dishwasher of this embodiment further includes an exhaust channel 8 communicated with the accommodating chamber 1, and the exhaust channel 8 is used for exhausting the air in the accommodating chamber 1 out of the dishwasher; further, the exhaust duct 8 is provided with a regulating assembly 801 for realizing the communication or disconnection of the exhaust duct 8 with the accommodation chamber 1. An adjusting mechanism capable of adjusting the size of an air outlet is arranged on the air exhaust channel 8, so that the size of the area of the air outlet 402 can be adjusted, the temperature of the dishwasher during washing can be ensured, energy is saved, and the risk that water is exhausted from the air exhaust channel to the outside during washing can be reduced; in the drying stage, the opening of the air port can be realized through the mechanism, the air discharge is accelerated, the drying is fast, and the heat loss from the accommodating chamber 1 is avoided.

Example sixteen

As shown in fig. 10 to 12, the present embodiment is a further limitation of the fifteenth embodiment, and the adjusting assembly 801 of the present embodiment includes a first adjusting unit 802 and a second adjusting unit 803; the first adjusting unit 802 is disposed in the exhaust duct 8, and connects or disconnects the exhaust duct 8 to or from the accommodation chamber 1; the second adjusting unit 803 is connected to the first adjusting unit 802 to provide power for the first adjusting unit 802, so that the exhaust channel 8 is connected to or disconnected from the accommodating chamber 1, and an adjusting mechanism capable of adjusting the size of an air outlet is arranged on the exhaust channel 8, so that the area of the air outlet 402 can be adjusted, that is, the temperature of the dishwasher during washing can be ensured, energy can be saved, and the risk that water is discharged from the air outlet during washing can be reduced; in the drying stage, the opening of the air port can be realized through the mechanism, the air discharge is accelerated, the drying is fast, and the heat loss from the accommodating chamber 1 is avoided.

Example seventeen

As shown in fig. 10 to 12, the present embodiment is further limited to the fifteenth embodiment or the sixteenth embodiment, in which a slide way is disposed in the exhaust channel 8; the first adjusting unit 802 is disposed in the slide way, and moves linearly under the action of the second adjusting unit 803, so as to connect or disconnect the exhaust channel 8 with or from the accommodating chamber 1; further, the area of the first adjusting unit 802 covering the exhaust passage 8 is S1; the area of the exhaust channel 8 is S2; the ratio of S1 to S2 is 0< S1/S2 ≦ 1.

The operation model of the adjusting mechanism and the shape of the air exhaust channel 8 are set, the adaptability of the adjusting mechanism is enhanced, the adaptability of the air exhaust channels 8 with different dish washer models and different shapes is enhanced, and meanwhile, the requirements of air exhaust and different drying conditions of different gears are met by adjusting the air exhaust channels 8 through the adjusting mechanism.

EXAMPLE eighteen

As shown in fig. 10 to 12, this embodiment is further limited to the fifteenth embodiment or the sixteenth embodiment, in which the first adjusting unit 802 and the second adjusting unit 803 are connected by a rotating shaft 804; the first adjusting unit 802 rotates in the exhaust channel 8 under the action of the second adjusting unit 803, so as to connect or disconnect the exhaust channel 8 with or from the accommodating chamber 1; the rotating shaft 804 is disposed at a position of the first adjusting unit 802 near one end surface or at a rotation center; the area of the first adjusting unit 802 covering the exhaust passage 8 is S1; the area of the exhaust channel 8 is S2; the ratio of S1 to S2 is 0< S1/S2 ≦ 1.

The operation model of the adjusting mechanism and the shape of the air exhaust channel 8 are set, the adaptability of the adjusting mechanism is enhanced, the adaptability of the air exhaust channels 8 with different dish washer models and different shapes is enhanced, and meanwhile, the requirements of air exhaust and different drying conditions of different gears are met by adjusting the air exhaust channels 8 through the adjusting mechanism.

Example nineteen

As shown in fig. 13, this embodiment is further limited to any one of the first to eighteenth embodiments, and the air duct structure of the dishwasher of this embodiment further includes a steam generating assembly 9 communicated with the accommodating chamber 1, and the steam generating assembly 9 generates steam by using water in the accommodating chamber 1 and conveys the steam back to the accommodating chamber 1, thereby realizing steam washing of articles to be washed.

Wherein the steam generation assembly 9 comprises a first connection pipe 901, a second connection pipe 902, a third connection pipe 903, a power part 904 and a heating part 905; the first connection pipe 901 is communicated with the power part 904; the third connection pipe 903 which communicates with the heating part 905; the first connection pipe 901 and the third connection pipe 903 are respectively communicated with the accommodating chamber 1; second connecting pipe 902 intercommunication power portion 904 with heating portion 905, the utility model discloses a set up and the steam generation subassembly 9 that holds cavity 1 intercommunication, realized utilizing the water that holds in the cavity 1 to carry out steam production, produce steam, realize the washing to the tableware to the problem of diversion alone has been avoided.

Further, the water in the accommodating chamber 1, under the action of the power part 904, passes through the first connecting pipe 901 and then enters the power part 904; after being pressurized in the power unit 904, the water enters the heating unit 905 through the second connection pipe 902, and is heated and boiled to high-temperature steam by the heating unit 905; the high-temperature water vapor enters the accommodating chamber 1 through the third connecting pipe 903, so that steam washing of articles to be washed in the accommodating chamber 1 is realized, the temperature of the chamber is rapidly increased in a short time by converting water in the accommodating chamber 1 into the high-temperature water vapor, and the effects of sterilizing and removing stains on tableware are effectively achieved.

Further, the temperature of the high-temperature water vapor is 100 ℃; the first connecting pipe 901 and the third connecting pipe 903 are hoses; the third connecting pipe 903 is a high temperature resistant hose.

Example twenty

As shown in fig. 13, this embodiment is a further limitation of the nineteenth embodiment, and the air duct structure of the dishwasher of this embodiment further includes a water tank configured to accommodate articles to be washed; the space of the sink containing the items to be washed forms said receiving chamber 1.

Example twenty one

As shown in fig. 14, the present embodiment is further limited to the nineteenth embodiment or the twentieth embodiment, and the method for using the steam generating assembly 9 of the present embodiment includes the following steps:

s1, a starting process, namely switching on a starting power supply;

s2, a pre-washing process, namely performing water inlet operation on the dish washing machine, performing pre-washing, and performing water drainage operation after the articles to be washed in the accommodating chamber 11 are pre-washed;

s3, a rinsing process, namely performing water inlet operation on the dish-washing machine, rinsing, and performing water drainage operation after rinsing of the articles to be washed in the accommodating chamber 11 is finished;

and S4, a drying process, namely, drying the dish washer.

Example twenty two

As shown in fig. 14, this embodiment is a further limitation of the twenty-first embodiment, in the method for using the steam generating assembly 9 of this embodiment, in the pre-washing process of step S2, before the pre-washing operation is performed, the steam washing operation is performed on the dishwasher; the steam used for the steam washing operation comes from a steam generating assembly 9 communicating with the containing chamber 1.

Example twenty three

As shown in fig. 14, in the present embodiment, which is a further limitation of the twenty-first embodiment or the twenty-second embodiment, in the using method of the steam generating assembly 9 of the present embodiment, in the rinsing process of step S3, water feeding, rinsing and draining operations are performed at least twice.

Example twenty-four

As shown in fig. 14, in this embodiment, which is a further limitation of any one of the twenty-first to twenty-third embodiments, in the using method of the steam generating assembly 9 of this embodiment, in the starting process of step S1, after the starting power is turned on, a drain operation is performed on the dishwasher to drain the residual water in the accommodating chamber 1.

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

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

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

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

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

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims (37)

1. An air duct structure of a dish washer, which is characterized in that: comprises that

An air duct communicating with the housing chamber (1) of the dishwasher;

a fan unit (201), a heating unit (202), a flow guide structure and a backflow prevention structure are arranged in the air duct;

the heating unit (202) is used for heating the airflow generated by the fan unit (201) to form dry hot air flowing into the accommodating chamber (1) through the air duct;

the flow guide structure guides the airflow flowing through the air channel and flowing in a disordered way into uniform airflow;

the backflow prevention structure prevents water or steam in the accommodating chamber (1) from flowing back into the air return duct.

2. The air duct structure of dishwasher according to claim 1, wherein: the air duct comprises

An air inlet channel (2), an air inducing channel (3) and an air outlet channel (4) which are communicated with the accommodating chamber (1) and are sequentially connected;

the air inlet channel (2) is provided with a fan unit (201) and a heating unit (202);

the air inducing channel (3) is at least partially attached to the outer wall of the accommodating chamber (1);

the air outlet channel (4) is at least partially attached to the top wall of the accommodating chamber (1) and at least communicated with the accommodating chamber (1).

3. The air duct structure of a dishwasher according to claim 2, wherein: the heating unit (202) is arranged in the air inlet direction of the fan unit (201) and in an area formed inside the air inlet channel (2).

4. The air duct structure of dishwasher according to claim 3, wherein:

the air conditioner also comprises a conversion piece (10) which is connected with the air inlet channel (2) and the heating unit (202);

the heating unit (202) is arranged in the conversion piece (10).

5. The air duct structure of dishwasher according to claim 4, wherein: the conversion piece (10) and the air inlet channel (2) are sealed through a sealant.

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

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

8. The air duct structure of a dishwasher according to claim 2, wherein:

an arc-shaped transition structure (6) is arranged at the joint of the air inlet channel (2) and the air inducing channel (3) and the joint of the air inducing channel (3) and the air outlet channel (4);

the arc-shaped transition structure (6) forms a trend that the air flow generated by the fan unit (201) is introduced into the induced air channel (3) and the air outlet channel (4) from the air inlet channel (2).

9. The air duct structure of a dishwasher according to claim 8, wherein: the air channel formed on the outer wall of the accommodating chamber (1) by the air inducing channel (3) is of a linear structure convenient for air flow to pass through.

10. The air duct structure of a dishwasher according to claim 9, wherein: the cross sectional area of the airflow basin in the air inducing channel (3) is smaller than that of the airflow basin in the air inlet channel (2).

11. The air duct structure of a dishwasher according to claim 2, wherein:

the air outlet channel (4) comprises an air inlet (401) and an air outlet (402);

the air inlet (401) is communicated with the induced air channel (3);

the air outlet (402) is communicated with the accommodating chamber (1).

12. The air duct structure of a dishwasher according to claim 11, wherein: the air outlet channel (4) is formed by gradually increasing the area of an airflow basin from the air inlet (401) to one side of the air outlet (402).

13. The air duct structure of a dishwasher according to claim 11, wherein:

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).

14. The air duct structure of a dishwasher according to claim 13, wherein: a height difference is formed between the first bottom surface (403) and the second bottom surface (404).

15. The air duct structure of a dishwasher according to claim 14, wherein:

when the airflow generated by the fan unit (201) flows along one side of the air inlet (401) to one side of the air outlet (402) in the air outlet channel (4), the height difference between the first bottom surface (403) and the second bottom surface (404) forms the flow guide structure;

when water or steam in the accommodating chamber (1) flows along one side of the air outlet (402) to one side of the air inlet (401) in the air outlet channel (4), the height difference between the first bottom surface (403) and the second bottom surface (404) forms the backflow preventing structure.

16. The air duct structure of a dishwasher according to claim 15, wherein: 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).

17. The air duct structure of a dishwasher according to claim 16, wherein: the side wall of the air outlet channel (4) is arc-shaped.

18. The air duct structure of a dishwasher according to claim 17, wherein: and at least part of the arc-shaped side wall of the air outlet channel (4) is of a C-shaped structure.

19. The air duct structure of a dishwasher according to claim 13, wherein:

the flow guide structure comprises a plurality of guide plates (405) which are arranged on the bottom wall of the air outlet channel (4) at intervals;

the guide plate (405) guides the airflow flowing through the air outlet channel (4) from the air inlet (401) to the air outlet (402).

20. The air duct structure of a dishwasher according to claim 19, wherein:

the guide plate (405) is arranged in an arc shape;

a trend of air flow from the air inlet (401) to the air outlet (402) is formed.

21. The air duct structure of a dishwasher according to claim 20, wherein: the radian of the guide plate (405) is the same as that of the side wall of the air outlet channel (4).

22. The air duct structure of a dishwasher according to claim 21, wherein: the guide plate (405) is at least partially disposed on the first bottom surface (403).

23. The air duct structure of a dishwasher according to claim 13, wherein:

the backflow prevention structure comprises a water retaining rib (409) arranged on the first bottom surface (403);

the water retaining rib (409) is perpendicular to the flowing direction of water or steam in the air outlet channel (4).

24. The air duct structure of a dishwasher according to any one of claims 11 to 23, wherein:

a grille (406) is arranged at the air outlet (402) of the air outlet channel (4);

a plurality of grid sheets (407) are arranged on the grid (406) at intervals.

25. The air duct structure of a dishwasher according to claim 24, wherein: the grid sheet (407) can rotate around a shaft, and the air outlet angle of the grid sheet (407) is adjusted.

26. The air duct structure of a dishwasher according to claim 25, wherein:

the angles and directions of the rotation of at least two grid sheets (407) around the shaft are different;

when the airflow generated by the fan unit (201) flows along one side of the air inlet (401) to one side of the air outlet (402) in the air outlet channel (4), the airflow in the air outlet channel (4) enters the accommodating chamber (1) at different angles and directions under the guidance of the grating sheets (407) with at least two different angles and directions;

when water or steam in the accommodating chamber (1) flows from the air outlet channel (4) to the air inlet (401) along one side of the air outlet (402), at least part of the water or steam in the accommodating chamber (1) is blocked outside the air outlet channel (4) under the action of the grid pieces (407) with different angles and directions.

27. The air duct structure of a dishwasher according to claim 26, wherein: the grille (406) is detachably connected with the air outlet (402).

28. The air duct structure of a dishwasher according to claim 27, wherein:

the periphery of the grating (406) is provided with claws;

the air outlet (402) is provided with a clamping groove corresponding to the clamping jaw;

the clamping claws are matched with the clamping grooves, so that the grating (406) and the air outlet (402) are detached.

29. The air duct structure of a dishwasher according to any one of claims 2 to 23, wherein: the backflow preventing structure comprises a switch portion (408) which is arranged in the air outlet channel (4) and can open or close the air outlet channel (4).

30. The air duct structure of a dishwasher according to claim 29, wherein: the switch part (408) at least opens or closes the air outlet channel (4) along the flowing direction of the air flow in the air outlet channel (4).

31. The air duct structure of a dishwasher according to claim 30, wherein:

the switch part (408) is connected with a driving device;

and after the driving device receives the opening or closing signal, the switching part (408) is driven to open or close the air outlet channel (4).

32. The air duct structure of a dishwasher according to claim 31, wherein:

at least the outer edge of the switch part (408) is wrapped with an elastic sealing structure;

when the switch part (408) is closed, the sealing structure is matched with the inner wall of the air outlet channel (4), and the switch part (408) seals the air outlet channel (4).

33. The air duct structure of a dishwasher according to any one of claims 2 to 23, wherein: the backflow prevention structure further comprises a water storage tank (301) arranged at the bottom of the induced draft channel (3).

34. The air duct structure of a dishwasher according to claim 33, wherein: and a structure for guiding water or steam flowing back from the air outlet channel (4) to the water storage tank (301) is formed on the inner wall of the air guiding channel (3).

35. The air duct structure of a dishwasher according to claim 34, wherein: the lowest end of the water storage tank (301) is provided with a water outlet.

36. The air duct structure of a dishwasher according to claim 35, wherein: the water outlet is opened and closed through a plug body which is pulled or rotated.

37. The air duct structure of a dishwasher according to claim 36, wherein: the pulling or rotation of the plug body is realized manually or electrically.

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