CN210871419U - 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 a first air duct and a second air duct which are communicated with a containing cavity of the dish washing machine; the first air duct is provided with a fan unit; under the action of the fan unit, the air in the accommodating chamber is discharged out of the dishwasher from the first air channel; the air outside the accommodating chamber enters the accommodating chamber from the second air duct; and a backflow preventing structure for preventing water or steam from flowing backwards along the air duct from the accommodating cavity is further arranged in the first air duct. The utility model provides an air channel structure of a dish washing machine, which utilizes the characteristics of large air quantity and low noise of a cross flow fan by arranging the cross flow fan in a first air channel, and reduces the influence of the dish washing machine on the surrounding environment; meanwhile, the cross-flow fan adopts a use mode of exhausting air from the accommodating cavity and is matched with the PTC heater arranged on the second air channel, the accommodating cavity is exhausted to be negative pressure, and a hot air drying mode is adopted from the second air channel, so that the quick drying of the accommodating cavity of the dish washing machine is realized.

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 dish washing machine generally needs to dry the dishes after washing the dishes, and in the existing dish washing machine, one part of the dish washing machine utilizes waste heat to dry the dishes, and the other part of the dish washing machine utilizes an additional drying system to dry the dishes. The drying system can be an air exhaust system, and humid air in the dishwasher is exhausted to the outside through the air exhaust system so as to achieve the aim of drying. The air source of the existing dish washer is mostly provided with a centrifugal fan and an axial flow fan, the fan has the defects of small air volume, high noise and the like, and the defects can be effectively avoided by adopting a perfusion fan, so that the air volume is large and the noise is low.

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 cross-flow fan is arranged in the first air channel, so that the influence of the dish washing machine on the surrounding environment is reduced by utilizing the characteristics of large air volume and low noise of the cross-flow fan; meanwhile, the cross-flow fan adopts a use mode of exhausting air from the accommodating cavity and is matched with the PTC heater arranged on the second air channel, so that the accommodating cavity is exhausted to be negative pressure, a drying mode of feeding hot air from the second air channel is realized, and the rapid drying of the inner space of the accommodating cavity of the dish-washing machine is realized.

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 an air duct structure of a dishwasher 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

A first air duct and a second air duct communicated with the accommodation chamber of the dishwasher;

the first air duct is provided with a fan unit;

under the action of the fan unit, the air in the accommodating chamber is discharged out of the dishwasher from the first air channel;

the air outside the accommodating chamber enters the accommodating chamber from the second air duct;

and a backflow preventing structure for preventing water or steam from flowing backwards along the air duct from the accommodating cavity is further arranged in the first air duct.

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

in one embodiment, under the action of negative pressure formed in the accommodating chamber, external air of the accommodating chamber enters the accommodating chamber from the second air duct;

in one embodiment, a heating unit is further disposed within the second air duct;

in one embodiment, the heating unit is arranged in an area formed by the air inlet direction of the second air duct;

after the air outside the accommodating chamber passes through the second air channel, dry hot air flow is formed under the action of the heating unit, and the accommodating chamber is pumped into negative pressure through a cross-flow fan arranged in the first air channel and a PTC heater arranged on the second air channel and is matched with the cross-flow fan, so that the drying mode of feeding hot air from the second air channel is realized, and the rapid drying of the inner space of the accommodating chamber of the dishwasher is realized;

in one embodiment, the heating breadth formed by the heating unit in the second air duct at least covers the airflow domain of the cross section of the second air duct, and the installation position of the heating unit is arranged, so that the heating action area of the heating unit is enlarged, the wind resistance can be reduced, and the air volume loss of air passing through the heating unit is reduced;

in one embodiment, the heating unit is a PTC heater disposed within the second air duct;

in one embodiment, the fan unit is a cross flow fan arranged in the first air channel, a large amount of drying air sources are provided by arranging the cross flow fan in the first air channel, and meanwhile, the cross flow fan is low in noise during operation, influences on the surrounding environment of the dish washing machine are reduced, and a more comfortable environment is provided for users.

Further, the first air duct includes

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 outlet channel is provided with the fan unit;

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

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

in one embodiment, 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 leading the gas in the accommodating cavity 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 area of an airflow basin 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;

the air flow generated by the fan unit is introduced into the induced air channel and the air outlet channel from the air inlet channel;

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 basin in the air inducing channel is smaller than that of the airflow basin in the air inlet channel, 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 transmission speed is obtained and quickly passes through the air channel of the small-area basin, so that the transmission efficiency of the airflow in the air channel is improved, and the loss of air volume is avoided;

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

in one embodiment, the arc-shaped side wall of the air inlet 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 air inlet channel comprises an air inlet and an air outlet;

the air inlet is communicated with the accommodating chamber;

the air outlet is communicated with the air inducing channel;

in one embodiment, the air inlet channel forms a flow field area from the air inlet to one side of the air outlet, the flow field area from the air inlet to the air outlet is gradually reduced, the reduction of the airflow is facilitated, the guide plate and the air inlet channel can guide the flowing airflow conveniently, and the airflow with disordered flow fields is changed into airflow with stable and uniform flow fields;

in one embodiment, the backflow prevention structure comprises a grid arranged at the air inlet;

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, primary shielding of water or steam in the accommodating cavity entering the air channel is realized, and the occurrence probability of backflow of the water or the steam along the air channel is reduced;

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

the water or steam in the accommodating chamber is at least partially blocked outside the air outlet channel under the action of the grid pieces with different angles and directions, and the grid with adjustable orientation is arranged at the air inlet of the air duct;

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

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

the air inlet 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.

Furthermore, the backflow preventing structure comprises a switch part which is arranged in the air inlet channel and can open or close the air inlet channel, the switch part realizes the sealing of the air inlet channel, ensures the isolation of the air inlet channel and the accommodating chamber of the dish washing machine, and avoids the backflow of water or steam in the washing or steam drying process;

in one embodiment, the switching portion opens or closes the air intake passage at least in a direction in which the air flow flows in the air intake passage;

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 realize the opening or closing of the air inlet 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 inlet channel, and the switch part is used for sealing the air inlet channel.

Still further, the backflow preventing structure comprises a first bottom surface and a second bottom surface which are arranged on the bottom wall of the air inlet 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 forming the backflow preventing structure is arranged between the first bottom surface and the second bottom surface, and the height difference enables the flow track of water or steam flowing back from the accommodating cavity to be changed, so that the flowability of the water or steam is reduced;

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;

in one embodiment, the backflow prevention structure comprises a water blocking rib arranged on the second bottom surface, and the water blocking rib further blocks water or steam flowing in the air inlet channel;

the water retaining ribs are arranged perpendicular to the flowing direction of water or steam in the air inlet channel.

Furthermore, 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 air inducing channel is formed with a structure for guiding the water or steam flowing back from the air inducing channel to the water storage tank, so that the 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.

Meanwhile, an adjusting component is arranged in the second air duct;

the adjusting assembly is used for realizing the connection or disconnection of the second air duct and the accommodating chamber;

in one embodiment, the conditioning assembly includes a first conditioning unit and a second conditioning unit;

the first adjusting unit is arranged in the second air duct and is used for communicating or disconnecting the second air duct with the accommodating cavity;

the second adjusting unit is connected with the first adjusting unit and provides power for the first adjusting unit to realize the connection or disconnection of the second air duct and the accommodating chamber, and an adjusting mechanism capable of adjusting the size of the air outlet is arranged on the second air duct to realize the adjustment of the area of the air outlet, so that the temperature of the dishwasher during washing can be ensured, the energy can be saved, and the risk of damaging the PTC heater due to backflow of water from the second air duct during washing can be reduced; in the drying stage, the second air duct can be opened through the mechanism, and the negative pressure of the accommodating chamber enables the air flow outside the second air duct to flow into the accommodating chamber from the second air duct.

In one embodiment, a slide is disposed within the second air chute;

the first adjusting unit is arranged in the slide way and linearly moves under the action of the second adjusting unit, so that the second air duct is communicated with or disconnected from the accommodating chamber;

in one embodiment, the first adjusting unit shields the second air duct by an area S1;

the area of the second air duct is S2;

the ratio of S1 to S2 is 0< S1/S2 ≦ 1.

In one embodiment, the first adjusting unit and the second adjusting unit are connected by a rotating shaft;

the first adjusting unit rotates in the second air duct under the action of the second adjusting unit, so that the second air duct is communicated with or disconnected from the accommodating chamber;

in one embodiment, the rotation shaft is provided at a position near one end surface of the first regulation unit or at a rotation center;

in one embodiment, the first adjusting unit shields the second air duct by an area S1;

the area of the second air duct is S2;

the ratio of S1 to S2 is 0< S1/S2 ≦ 1.

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

1. the utility model discloses a set up the air channel structure that the chamber is held to laminating dish washer, and the air current basin area in the air channel changes, realized that the air current passes through the air channel fast, get into first air channel from holding the chamber, and then form the chamber that holds of negative pressure, the gas outside the second air channel receives the effect of the chamber that holds of negative pressure, gets into along the second air channel and holds the chamber, realizes holding the stoving of chamber;

2. by arranging the backflow prevention structure in the air duct, 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 arc-shaped transition structure is arranged at the air channel exchange part, namely the change part of the area of the airflow basin 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 air volume is greatly reduced while the airflow rapidly passes through the air channel;

4. through the change of the airflow basin of the air channel and the arrangement of two planes with different heights at the air outlet, the effects of multiple superposition of passing water or steam and backflow prevention are formed, and the situations that the water or steam in the accommodating cavity flows back along the air channel to cause damage of a fan unit or remains and causes corrosion and mildew in the air channel are further avoided;

5. the air outlet of the air duct is provided with the grille with adjustable direction, further, the grille can face at least two different directions in the adjusting process, primary shielding of water or steam in the accommodating chamber entering the air duct is realized, and the occurrence probability of backflow of the water or the steam along the air duct 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 first air channel, so that a large amount of drying air sources are provided, and meanwhile, the noise is low during the operation of the cross-flow fan, the influence on the surrounding environment of the dish washing machine is reduced, and a more comfortable environment is provided for users;

8. through the cross flow fan arranged in the first air channel, and the PTC heater arranged on the second air channel is matched, the containing chamber is pumped into negative pressure, and the drying mode of hot air entering from the second air channel is realized, so that the rapid drying of the inner space of the containing chamber of the dish-washing machine is realized.

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 first schematic view of the air intake duct of the present invention;

FIG. 6 is a second schematic view of the air intake duct of the present invention;

FIG. 7 is a third schematic view of the air intake duct of the present invention;

FIG. 8 is a fourth schematic view of the air intake duct of the present invention;

fig. 9 is a first schematic view of a second air duct according to the present invention;

fig. 10 is a second schematic view of a second air duct according to the present invention;

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

figure 12 is a second schematic view of the adjustment assembly 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. a first air duct; 201. a fan unit; 202. a guide plate; 203. an air inlet channel; 204. an induced draft channel; 205. an air outlet channel; 206. a transition structure; 207. an air inlet; 208. an air outlet; 209. a grid; 210. a grid sheet; 211. a switch section; 212. a first bottom surface; 213. a second bottom surface; 214. water retaining ribs; 215. a water storage tank; 3. a second air duct; 301. a heating unit; 302. an adjustment assembly; 303. a first adjusting unit; 304. a second adjusting unit; 305. a rotating shaft; 4. a steam generating assembly; 401. a first connecting pipe; 402. a second connecting pipe; 403. a third connecting pipe; 404. a power section; 405. a heating section.

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.

FIGS. 1 and 2 are the first and second schematic diagrams of the whole assembly of the air duct structure of the dishwasher according to the present invention, mainly showing the assembly position relationship between the accommodating chamber 1 and the air duct, as can be seen from FIGS. 1 and 2, the air duct of the present invention comprises a first air duct 2 and a second air duct 3, wherein the first air duct 2 comprises an air inlet channel 203, an air inducing channel 204 and an air outlet channel 205, the air outlet channel 205 is externally connected with a fan unit 201, the fan unit 201 generates an air direction for extracting air from the accommodating chamber 1, so that the air in the accommodating chamber 1 is discharged out of the dishwasher along the air inlet channel 203, the drainage channel and the air outlet channel 205, thereby generating a negative pressure in the accommodating chamber 1, the second air duct 3 is communicated with the accommodating chamber 1, and because the air duct is evacuated to a negative pressure in the accommodating chamber 1, a tendency of sucking air from the second air duct 3 is formed, the air outside the second air duct 3 enters the accommodating chamber 1 along the second air duct 3, in addition, a heating unit 301 may be disposed in the second air duct 3, and the air flowing through is heated by the heating unit 301 to form a hot dry air flow entering the accommodating chamber 1 from the second air duct 3; further, the air outlet channel 205 is disposed at the bottom of the accommodating chamber 1, the air inducing channel 204 is tightly attached to the side wall of the accommodating chamber 1, the air inlet channel 203 is tightly attached to the top of the accommodating chamber 1, meanwhile, the air inlet channel 203 is disposed in an approximately C-shaped arc structure, and the air flow generated by the fan unit 201 is drawn out through the air outlet channel 205, the air inducing channel 204 and the air inlet channel 203.

Fig. 3 and fig. 4 are the first and second schematic diagrams of the air duct structure and the schematic diagram of the fan unit 201 of the present invention, as can be seen from fig. 3 and fig. 4, the air duct includes an air inlet channel 203, an air inducing channel 204, and an air outlet channel 205, and in the process of air duct conversion, an arc-shaped transition structure 206 is further provided, and at the change position of the area of the air duct basin, the transition structure 206 is provided, so that the flowing air can be guided by the arc-shaped transition structure 206, the flow direction is converted, and the rigid contact between the air flow direction and the inner wall of the air duct is avoided, and the air flow passes quickly; furthermore, a water storage tank 215 is further arranged at the induced air channel 204, a structure for guiding the water or steam flowing back from the air inlet channel 203 to the water storage tank 215 is formed on the inner wall of the induced air channel 204, and the structure of the inner wall of the induced air channel 204 can be understood as a structure inclined towards the water storage tank 215, and the steam attached to the inner wall of the induced air channel 204 is converged into the water storage tank 215 under the action of the inclined inner wall.

Fig. 5 to 8 are schematic diagrams of the first, second, third and fourth air intake channels 203 of the present invention, and it can be seen from the drawings that the air intake channels 203 are of an arc structure similar to C, an air outlet 208 communicated with the induced air channel 204 and an air inlet 207 communicated with the accommodating chamber 1 are arranged in the air intake channels 203, and 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 further arranged in the air intake channels 203; the guide plate 202 is also of an arc-shaped structure, and has the same radian as the arc-shaped side wall of the air inlet channel 203, so that the airflow in the air outlet channel 205 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 channel under the action of the arc-shaped side wall of the air outlet channel 205, the height difference between the guide plate 202 and the first bottom surface 212, and the height difference between the guide plate 202 and the second bottom surface 213, and the water retaining ribs 214, so that the water or steam is prevented from flowing to the fan unit 201 along the drainage air channel, and the fan unit 201 is prevented from being damaged; in addition, a grille 209 is arranged at the air inlet 207 of the air outlet channel 205; a plurality of grid sheets 210 are arranged on the grid 209 at intervals; further, the grid pieces 210 can rotate around a shaft, and the angle and direction of the rotation of at least two grid pieces 210 around the shaft are different, so as to adjust the air outlet angle of the grid pieces 210; furthermore, the grille 209 is detachably connected with the air inlet 207, the circumference of the grille 209 is provided with a clamping jaw, and the air inlet 207 is provided with a clamping groove corresponding to the clamping jaw; the jack catch with the draw-in groove cooperation realizes grid 209 with air intake 207's dismantlement is convenient for the user to the washing and the maintenance of grid 209.

Fig. 9 to 12 are first and second schematic views of the second air duct 3 of the present invention, and first and second schematic views of the adjusting assembly 302,

as can be seen from the figure, the utility model discloses set up the adjusting part 302 that can connect or break off the air exhaust passageway on second wind channel 3, through setting up the adjustment mechanism that can adjust the size of air exit in second wind channel 3, realize the size of air intake 207 area is adjustable, can guarantee the temperature during washing of dishwasher, the energy can be saved, can reduce the risk that water discharges the external world from second wind channel 3 during washing again; in the drying stage, the opening of the air port can be realized through a mechanism, the entering of air is accelerated, and the drying is fast; and simultaneously, the utility model discloses an adjusting part 302 has adopted two kinds of technical scheme, can horizontal migration and upset rotate, and the shape of second wind channel 3 can multiple change, although only be the second wind channel 3 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 the shape of passageway of airing exhaust, aim at strengthens adjustment mechanism's adaptability, and different dish washer models, the adaptability of different shapes second wind channels 3, simultaneously through adjustment mechanism to second wind channel 3's regulation, the demand of different gear air inlets and different stoving circumstances has been satisfied.

Fig. 13 is a schematic view of the steam generating assembly 4 of the present invention, in which the accommodating chamber 1 is communicated with the steam generating assembly 4, and the steam generating assembly 4 communicated with 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 alone; 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 4, 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 4 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 tableware 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 a first air duct 2 and a second air duct 3 communicated with 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 air in the accommodating chamber 1 is discharged out of the dishwasher through the first air duct 2; the air outside the accommodating chamber 1 enters the accommodating chamber 1 from the second air duct 3; and a backflow preventing structure for preventing water or steam from flowing backwards along the air duct from the accommodating chamber 1 is further arranged in the first air duct 2.

The utility model discloses a set up the air channel structure that the chamber 1 is held to the laminating dish washer, and the air current basin area in the air channel changes, realized that the air current passes through the air channel fast, get into first air channel 2 from holding chamber 1, and then form the holding chamber 1 of negative pressure, the gas outside second air channel 3 receives the effect of the holding chamber 1 of negative pressure, gets into holding chamber 1 along second air channel 3, realizes holding chamber 1's stoving; further, by arranging the backflow prevention structure in the air duct, water or steam in the accommodating chamber 1 is prevented from flowing back along the air duct, so that the fan unit 201 is prevented from being damaged, or the residual air and the air duct are prevented from being corroded and mildewed.

Example two

As shown in fig. 1 to 4, this embodiment is a further limitation of the first embodiment, in the air duct structure of the dishwasher of this embodiment, the air in the accommodating chamber 1 generates a tendency of being discharged from the accommodating chamber 1 along the first air duct 2 out of the dishwasher under the action of the fan unit 201, a large amount of drying air sources are provided by providing the cross flow fan in the first air duct 2, and meanwhile, the noise is small when the cross flow fan operates, the influence on the environment around the dishwasher is reduced, a more comfortable environment is provided for a user, and under the action of the negative pressure formed in the accommodating chamber 1, the air outside the accommodating chamber 1 enters the accommodating chamber 1 from the second air duct 3.

EXAMPLE III

As shown in fig. 9, this embodiment is a further limitation of the first embodiment or the second embodiment, and a heating unit 301 is further disposed in the second air duct 3 in this embodiment; the heating unit 301 is arranged in an area formed in the air inlet direction of the second air duct 3; the air outside the accommodating chamber 1 passes through the second air channel 3, and then forms dry hot air flow under the action of the heating unit 301, and through the cross-flow fan arranged in the first air channel 2 and the cooperation of the PTC heater arranged on the second air channel 3, the accommodating chamber 1 is pumped into negative pressure, and hot air enters from the second air channel 3 to dry the inner space of the accommodating chamber 1 of the dishwasher.

Example four

As shown in fig. 1 to 4 and 9, this embodiment is further limited to any one of the first to third embodiments, in which the heating breadth formed by the heating unit 301 in the second air duct 3 at least covers the airflow domain of the cross section of the second air duct 3, and by arranging the installation position of the heating unit 301, the heating action area of the heating unit 301 is enlarged, and the wind resistance can also be reduced, and the loss of the air volume passing through the heating unit 301 can be reduced; the heating unit 301 is a PTC heater disposed in the second air duct 3; the fan unit 201 is a cross flow fan arranged in the first air duct 2, and a large amount of drying air sources are provided by arranging the cross flow fan in the first air duct 2, and meanwhile, the cross flow fan has low noise during operation, so that the influence on the surrounding environment of the dishwasher is reduced, and a more comfortable environment is provided for users.

Through the cross flow fan arranged in the first air channel 2, and the PTC heater arranged on the second air channel 3 is matched, the containing chamber 1 is pumped into negative pressure, hot air enters from the second air channel 3 in a drying mode, and the rapid drying of the inner space of the containing chamber 1 of the dish washing machine is realized.

EXAMPLE five

As shown in fig. 3 to 8, the present embodiment is further defined by any one of the first to fourth embodiments, in which the first air duct 2 includes an air inlet channel 203, an air inducing channel 204 and an air outlet channel 205, which are communicated with the accommodating chamber 1 and sequentially connected to each other; the air outlet channel 205 is provided with the fan unit 201; the air inducing channel 204 is at least partially attached to the outer wall of the accommodating chamber 1; the air inlet channel 203 is at least partially attached to the top wall of the accommodating chamber 1 and communicated with the accommodating chamber 1; an arc-shaped transition structure 206 is arranged at the connection part of the air inlet channel 203 and the air inducing channel 204 and the connection part of the air inducing channel 204 and the air outlet channel 205; the arc-shaped transition structure 206 forms a trend of introducing the gas in the accommodating chamber 1 from the air inlet channel 203 into the air inducing channel 204 and the air outlet channel 205, and the arc-shaped transition structure 206 is arranged at the air channel exchange position, namely the change position of the area of an airflow domain in the air channel, so that the flowing airflow can be guided by the arc-shaped transition structure 206 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; the airflow generated by the fan unit 201 is introduced from the air inlet channel 203 into the air inducing channel 204 and the air outlet channel 205.

EXAMPLE six

As shown in fig. 3 to 8, in this embodiment, the air duct formed on the outer wall of the accommodating chamber 1 by the air inducing channel 204 is a linear structure for facilitating the air flow to pass through, and a linear air duct structure for facilitating the air flow to pass through quickly, so as to avoid the air loss caused by the air duct with too many arc or bend angles; the cross-sectional area of the airflow basin in the air inducing channel 204 is smaller than that of the airflow basin in the air inlet channel 203, 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 and 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; the side wall of the air inlet channel 203 is arranged in an arc shape and is matched with the guide plate 202 to form a structure for adjusting the air flow flowing through; the arc-shaped side wall of the air inlet channel 203 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 water or steam flows back from the air channel in the working process of the dish washing machine to cause damage or corrosion of the cross-flow fan.

EXAMPLE seven

As shown in fig. 5 to 8, this embodiment is further defined by any one of the first to sixth embodiments, and the air intake channel 203 of this embodiment includes an air intake 207 and an air outlet 208; the air inlet 207 is communicated with the accommodating chamber 1; the air outlet 208 is communicated with the induced air channel 204; the air inlet channel 203 is from the air inlet 207 to one side of the air outlet 208, the area of the formed airflow flowing area is gradually reduced, and the area of the airflow flowing area from the air inlet 207 to the air outlet 208 is continuously reduced, so that the airflow is favorably decelerated, the guide plate 202 and the air inlet channel 203 can guide the flowing airflow, and the airflow with disordered flowing areas is changed into the airflow with stable and uniform flowing areas.

Example eight

As shown in fig. 1 to 8, this embodiment is a further limitation of any one of the first to seventh embodiments, and the backflow prevention structure of this embodiment includes a grille 209 disposed at the air inlet 207; a plurality of grid sheets 210 are arranged on the grid 209 at intervals; the grid plate 210 can rotate around a shaft, so that the air outlet angle of the grid plate 210 is adjusted, primary shielding of water or steam in the accommodating chamber 1 entering the air duct is realized, and the occurrence probability of backflow of the water or steam along the air duct is reduced; at least two of the grid pieces 210 rotate around the shaft at different angles and directions; under the action of the grid sheets 210 with different angles and directions, at least part of water or steam in the accommodating chamber 1 is blocked outside the air outlet channel 205, the grid 209 with adjustable orientation is arranged at the air inlet 207 of the air duct, and further, the grid 209 can face at least two different directions in the adjusting process, so that the primary shielding of the water or steam in the accommodating chamber 1 entering the air duct is realized, and the occurrence probability of the backflow of the water or steam along the air duct is reduced; the grille 209 is detachably connected with the air inlet 207; the periphery of the grating 209 is provided with claws; the air inlet 207 is provided with a clamping groove corresponding to the clamping jaw; the jack catch with the draw-in groove cooperation realizes grid 209 with the dismantlement of air outlet 208, the user of being convenient for is to the washing and the maintenance of grid 209.

The utility model prevents water or steam in the chamber 1 from flowing back along the air channel to damage the fan unit 201 or remain the air channel to corrode or mildew; the grid 209 with adjustable orientation is arranged at the air outlet 208 of the air duct, and further, the grid 209 can face at least two different directions in the adjustment process, so that the primary shielding of water or steam in the accommodating chamber 1 entering the air duct is realized, and the occurrence probability of the backflow of the water or steam along the air duct is reduced; the shape of the air duct at the top of the accommodating chamber 1 is set to be an arc structure similar to a C shape, 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.

Example nine

As shown in fig. 1 to 8, the present embodiment is further defined by any one of the first to eighth embodiments, the backflow preventing structure of the present embodiment includes a switch portion 211 disposed in the air inlet channel 203 and capable of opening or closing the air inlet channel 203, the switch portion 211 realizes the sealing of the air inlet channel 203, ensures the isolation between the air inlet channel 203 and the accommodating chamber 1 of the dishwasher, and avoids the backflow of water or steam during the washing or steam drying process; the switch part 211 opens or closes the air inlet channel 203 at least along the direction of the airflow flowing in the air inlet channel 203; the switch part 211 is connected with a driving device; after the driving device receives the opening or closing signal, the switching part 211 is driven to open or close the air inlet channel 203.

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

Example ten

As shown in fig. 1 to 8, this embodiment is further defined by any one of the first to ninth embodiments, and the backflow preventing structure of this embodiment includes a first bottom surface 212 and a second bottom surface 213 disposed 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 for forming the backflow preventing structure is provided between the first bottom surface 212 and the second bottom surface 213, and the height difference changes a flow path of the water or the steam flowing back from the accommodating chamber 1, so that the fluidity of the water or the steam is reduced; 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 backflow prevention structure comprises a water blocking rib 214 arranged on the second bottom surface 213, and the water blocking rib 214 further blocks water or steam flowing in the air inlet channel 203; the water blocking ribs 214 are arranged perpendicular to the flowing direction of water or steam in the air inlet channel 203.

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 205, the height difference between the guide plate 202 and the first and second bottom surfaces 212 and 213, and the water blocking rib 214, so that the water or steam is prevented from flowing to the fan unit 201 along the drainage air duct to damage the fan unit 201; in addition, a grille 209 is arranged at the air inlet 207 of the air outlet channel 205; a plurality of grid sheets 210 are arranged on the grid 209 at intervals; further, the grid pieces 210 can rotate around a shaft, and the angle and direction of the rotation of at least two grid pieces 210 around the shaft are different, so as to adjust the air outlet angle of the grid pieces 210; furthermore, the grille 209 is detachably connected with the air inlet 207, the circumference of the grille 209 is provided with a clamping jaw, and the air inlet 207 is provided with a clamping groove corresponding to the clamping jaw; the jack catch with the draw-in groove cooperation realizes grid 209 with air intake 207's dismantlement is convenient for the user to the washing and the maintenance of grid 209.

EXAMPLE eleven

As shown in fig. 1 to 8, this embodiment is further defined by any one of the first to tenth embodiments, and the backflow preventing structure of this embodiment further includes a water storage tank 215 disposed at the bottom of the air inducing channel 204, and the water storage tank 215 enables water remaining along the air duct to be hit and stored at one place.

Example twelve

As shown in fig. 1 to 8, this embodiment is a further limitation of the eleventh embodiment, in this embodiment, a structure for guiding the water or the steam flowing back from the air intake channel 203 to the water storage tank 215 is formed on the inner wall of the air intake channel 204, 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 induced air channel 204 can be understood as a structure inclined towards the water storage tank 215, and the steam attached to the inner wall of the induced air channel 204 flows into the water storage tank 215 under the action of the inclined inner wall.

Further, the lowest end of the water storage tank 215 is provided with a water outlet, so that the phenomenon that the washing water is remained in the air duct for a long time and is corroded and deteriorated after the water or the steam in the accommodating chamber 1 flows back along the air duct is avoided.

EXAMPLE thirteen

As shown in fig. 1 to 8, the present embodiment is further limited to the twelfth embodiment, in which the drainage port is opened and closed by a plug body which is pulled or rotated; the pulling or the rotation of the plug body is realized in a manual or electric mode, and a user can realize the drainage in the water storage tank 215 by regularly opening the plug body manually or controlling the plug body to be automatically opened and closed through a program.

Example fourteen

As shown in fig. 10 to 12, this embodiment is further limited to the first to thirteenth embodiments, in this embodiment, an adjusting component 302 is disposed in the second air duct 3, and the adjusting component 302 is used for realizing the connection or disconnection between the second air duct 3 and the accommodating chamber 1.

Example fifteen

As shown in fig. 10 to 12, this embodiment is a further limitation of the fourteenth embodiment, and the adjusting assembly 302 of this embodiment includes a first adjusting unit 303 and a second adjusting unit 304; the first adjusting unit 303 is disposed in the second air duct 3, and connects or disconnects the second air duct 3 to or from the accommodating chamber 1; the second adjusting unit 304 is connected with the first adjusting unit 303, and provides power for the first adjusting unit 303 to realize communication or disconnection between the second air duct 3 and the accommodating chamber 1; the second adjusting unit 304 is connected with the first adjusting unit 303, provides power for the first adjusting unit 303, and realizes that the second air duct 3 is communicated with or disconnected from the accommodating chamber 1, and an adjusting mechanism capable of adjusting the size of an air outlet is arranged on the second air duct 3, so that the size of the area of the air outlet 208 can be adjusted, that is, the temperature of the dishwasher during washing can be ensured, energy can be saved, and the risk that the PTC heater is damaged due to backflow of water from the second air duct 3 during washing can be reduced; in the drying stage, the second air duct 3 may be opened by a mechanism, and the negative pressure in the accommodating chamber 1 causes the air outside the second air duct 3 to flow into the accommodating chamber 1 from the second air duct 3.

Example sixteen

As shown in fig. 10 to 12, the present embodiment is further defined by the fourteenth embodiment or the fifteenth embodiment, in which a slide way is disposed in the second air duct 3; the first adjusting unit 303 is arranged in the slideway, and moves linearly under the action of the second adjusting unit 304, so as to connect or disconnect the second air duct 3 with or from the accommodating chamber 1; the area of the first adjusting unit 303 shielding the second air duct 3 is S1; the area of the second air duct 3 is S2; the ratio of S1 to S2 is 0< S1/S2 ≦ 1.

Example seventeen

As shown in fig. 10 to 12, this embodiment is further limited to the fourteenth embodiment or the fifteenth embodiment, in which the first adjusting unit 303 and the second adjusting unit 304 are connected by a rotating shaft 305; the first adjusting unit 303 rotates in the second air duct 3 under the action of the second adjusting unit 304, so as to connect or disconnect the second air duct 3 with or from the accommodating chamber 1; the rotation shaft 305 is provided at a position near one end surface of the first adjustment unit 303 or at a rotation center; the area of the first adjusting unit 303 shielding the second air duct 3 is S1; the area of the second air duct 3 is S2; the ratio of S1 to S2 is 0< S1/S2 ≦ 1.

EXAMPLE eighteen

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 4 communicated with the accommodating chamber 1, and the steam generating assembly 4 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 module 4 comprises a first connection pipe 401, a second connection pipe 402, a third connection pipe 403, a power part 404 and a heating part 405; the first connection pipe 401 communicating with the power unit 404; the third connection pipe 403 communicating with the heating part 405; the first connection pipe 401 and the third connection pipe 403 are respectively communicated with the accommodation chamber 1; second connecting pipe 402 intercommunication power portion 404 with heating portion 405, the utility model discloses a set up and hold the steam generation subassembly 4 of 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 individual diversion has been avoided.

Further, the water in the accommodating chamber 1, under the action of the power part 404, passes through the first connecting pipe 401 and then enters the power part 404; after being pressurized in the power unit 404, the water enters the heating unit 405 through the second connection pipe 402, and is heated and boiled to high-temperature steam by the heating unit 405; the high-temperature water vapor enters the accommodating chamber 1 through the third connecting pipe 403, so that steam washing of the 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 401 and the third connecting pipe 403 are flexible pipes; the third connecting pipe 403 is a high temperature resistant hose.

Example nineteen

As shown in fig. 13, this embodiment is a further limitation of the eighteenth 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

As shown in fig. 14, this embodiment is further limited to the eighteenth embodiment or the nineteenth embodiment, and the method for using the steam generating assembly 4 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 one

As shown in fig. 14, the present embodiment is a further limitation of the twenty-first embodiment, in the method for using the steam generating assembly 4 of the present embodiment, in the pre-washing process of step S2, before performing the pre-washing operation, the steam washing operation is performed on the dishwasher; the steam used for the steam washing operation comes from the steam generating assembly 4 communicating with the containing chamber 1.

Example twenty two

As shown in fig. 14, in the present embodiment, which is a further limitation of the twenty-first embodiment or the twenty-first embodiment, in the using method of the steam generating assembly 4 of the present embodiment, in the rinsing process of step S3, water feeding, rinsing and draining operations are performed at least twice.

Example twenty three

As shown in fig. 14, in this embodiment, which is a further limitation of any one of the twenty-first to twenty-second embodiments, in the using method of the steam generating assembly 4 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 (41)

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

A first air duct (2) and a second air duct (3) communicating with the housing chamber (1) of the dishwasher;

the first air duct (2) is provided with a fan unit (201);

the air in the accommodating chamber (1) is discharged out of the dishwasher from the first air duct (2) under the action of the fan unit (201);

the air outside the accommodating chamber (1) enters the accommodating chamber (1) from the second air duct (3);

and a backflow preventing structure for preventing water or steam from flowing backwards along the air channel from the accommodating chamber (1) is further arranged in the first air channel (2).

2. The air duct structure of dishwasher according to claim 1, wherein: the air in the accommodating chamber (1) generates a tendency of being discharged out of the dishwasher from the accommodating chamber (1) along the first air duct (2) under the action of the fan unit (201).

3. The air duct structure of a dishwasher according to claim 2, wherein: and under the action of negative pressure formed in the accommodating chamber (1), the external air of the accommodating chamber (1) enters the accommodating chamber (1) from the second air duct (3).

4. The air duct structure of dishwasher according to claim 1, wherein: and a heating unit (301) is also arranged in the second air duct (3).

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

the heating unit (301) is arranged in an area formed in the air inlet direction of the second air duct (3);

and after the air outside the accommodating cavity (1) passes through the second air duct (3), dry hot air flow is formed under the action of the heating unit (301).

6. The air duct structure of dishwasher according to claim 5, wherein: the heating breadth formed by the heating unit (301) in the second air duct (3) at least covers the airflow flow field of the cross section of the second air duct (3).

7. The air duct structure of dishwasher according to claim 6, wherein: the heating unit (301) is a PTC heater arranged in the second air duct (3).

8. The air duct structure of dishwasher according to claim 1, wherein: the fan unit (201) is a cross-flow fan arranged in the first air duct (2).

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

An air inlet channel (203), an air inducing channel (204) and an air outlet channel (205) which are communicated with the accommodating chamber (1) and are sequentially connected;

the air outlet channel (205) is provided with the fan unit (201);

the air inducing channel (204) is at least partially attached to the outer wall of the accommodating chamber (1);

the air inlet channel (203) is at least partially attached to the top wall of the accommodating chamber (1) and communicated with the accommodating chamber (1).

10. The air duct structure of a dishwasher according to claim 9, wherein:

an arc-shaped transition structure (206) is arranged at the joint of the air inlet channel (203) and the air inducing channel (204) and the joint of the air inducing channel (204) and the air outlet channel (205);

the arc-shaped transition structure (206) forms a trend of introducing gas in the accommodating chamber (1) from the air inlet channel (203) into the air inducing channel (204) and the air outlet channel (205);

the air flow generated by the fan unit (201) is introduced into the induced air channel (204) and the air outlet channel (205) from the air inlet channel (203).

11. The air duct structure of a dishwasher according to claim 10, wherein: the air channel formed by the air inducing channel (204) on the outer wall of the accommodating chamber (1) is of a linear structure convenient for air flow to pass through.

12. The air duct structure of a dishwasher according to claim 11, wherein: the cross sectional area of the airflow flow field in the air inducing channel (204) is smaller than that of the airflow flow field in the air inlet channel (203).

13. The air duct structure of a dishwasher according to claim 12, wherein: the side wall of the air inlet channel (203) is arc-shaped.

14. The air duct structure of a dishwasher according to claim 13, wherein: the arc-shaped side wall of the air inlet channel (203) is at least partially of a C-shaped structure.

15. The air duct structure of a dishwasher according to claim 9, wherein:

the air inlet channel (203) comprises an air inlet (207) and an air outlet (208);

the air inlet (207) is communicated with the accommodating chamber (1);

the air outlet (208) is communicated with the air inducing channel (204).

16. The air duct structure of a dishwasher according to claim 15, wherein: the area of the airflow flowing area formed by the air inlet channel (203) from the air inlet (207) to one side of the air outlet (208) is gradually reduced.

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

the backflow preventing structure comprises a grid (209) arranged at the air inlet (207);

a plurality of grid sheets (210) are arranged on the grid (209) at intervals.

18. The air duct structure of a dishwasher according to claim 17, wherein: the grid sheet (210) can rotate around a shaft, and the air outlet angle of the grid sheet (210) is further adjusted.

19. The air duct structure of a dishwasher according to claim 18, wherein:

the angles and directions of the rotation of at least two grid sheets (210) around the shaft are different;

the water or the steam in the accommodating chamber (1) is at least partially blocked outside the air outlet channel (205) under the action of the grid sheets (210) with different angles and directions.

20. The air duct structure of a dishwasher according to claim 19, wherein: the grille (209) is detachably connected with the air inlet (207).

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

the periphery of the grating (209) is provided with claws;

the air inlet (207) is provided with a clamping groove corresponding to the clamping jaw;

the clamping jaw is matched with the clamping groove to realize the detachment of the grating (209) and the air outlet (208).

22. The air duct structure of a dishwasher according to claim 15, wherein: the backflow prevention structure comprises a switch portion (211) which is arranged in the air inlet channel (203) and can be opened or closed to the air inlet channel (203).

23. The air duct structure of a dishwasher according to claim 22, wherein: the switch part (211) at least opens or closes the air inlet channel (203) along the flowing direction of the air flow in the air inlet channel (203).

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

the switch part (211) is connected with a driving device;

after the driving device receives the opening or closing signal, the switch part (211) is driven to open or close the air inlet channel (203).

25. The air duct structure of a dishwasher according to claim 24, wherein:

at least the outer edge of the switch part (211) is wrapped with an elastic sealing structure;

when the switch part (211) is closed, the sealing structure is matched with the inner wall of the air inlet channel (203), and the switch part (211) seals the air inlet channel (203).

26. The air duct structure of a dishwasher according to claim 22, wherein:

the backflow preventing structure comprises a first bottom surface (212) and a second bottom surface (213) which are 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).

27. The air duct structure of a dishwasher according to claim 26, wherein: and a height difference for forming the backflow preventing structure is arranged between the first bottom surface (212) and the second bottom surface (213).

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

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

the backflow prevention structure comprises a water retaining rib (214) arranged on the second bottom surface (213);

the water retaining ribs (214) are arranged perpendicular to the flowing direction of water or steam in the air inlet channel (203).

30. The air duct structure of a dishwasher according to any one of claims 15 to 26, wherein: the backflow preventing structure further comprises a water storage tank (215) arranged at the bottom of the induced draft channel (204).

31. The air duct structure of a dishwasher according to claim 30, wherein: the inner wall of the induced air channel (204) is provided with a structure which guides the water or steam which flows back from the air inlet channel (203) to the water storage tank (215).

32. The air duct structure of a dishwasher according to claim 31, wherein: the lowest end of the water storage tank (215) is provided with a water outlet.

33. The air duct structure of a dishwasher according to claim 32, wherein: the water outlet is opened and closed through a plug body which is pulled or rotated.

34. The air duct structure of a dishwasher according to claim 33, wherein: the pulling or rotation of the plug body is realized manually or electrically.

35. The air duct structure of a dishwasher according to any one of claims 1 to 29, wherein:

an adjusting component (302) is arranged in the second air duct (3);

the adjusting assembly (302) is used for realizing the communication or disconnection of the second air duct (3) and the accommodating chamber (1).

36. The air duct structure of a dishwasher according to claim 35, wherein:

the adjustment assembly (302) comprises a first adjustment unit (303) and a second adjustment unit (304);

the first adjusting unit (303) is arranged in the second air duct (3) and is used for connecting or disconnecting the second air duct (3) with the accommodating chamber (1);

the second adjusting unit (304) is connected with the first adjusting unit (303) and provides power for the first adjusting unit (303) to realize the communication or disconnection of the second air duct (3) and the accommodating chamber (1).

37. The air duct structure of a dishwasher according to claim 36, wherein:

a slideway is arranged in the second air duct (3);

the first adjusting unit (303) is arranged in the slide way and moves linearly under the action of the second adjusting unit (304), so that the second air duct (3) is communicated with or disconnected from the accommodating chamber (1).

38. The air duct structure of a dishwasher according to claim 37, wherein:

the area of the first adjusting unit (303) for shielding the second air duct (3) is S1;

the area of the second air duct (3) is S2;

the ratio of S1 to S2 is 0< S1/S2 ≦ 1.

39. The air duct structure of a dishwasher according to claim 36, wherein:

the first adjusting unit (303) and the second adjusting unit (304) are connected through a rotating shaft (305);

the first adjusting unit (303) rotates in the second air duct (3) under the action of the second adjusting unit (304), so that the second air duct (3) is communicated with or disconnected from the accommodating chamber (1).

40. The air duct structure of dishwasher of claim 39, wherein: the rotating shaft (305) is provided at a position near one end surface of the first adjusting unit (303) or at a rotation center.

41. The air duct structure of dishwasher of claim 40, wherein: the area of the first adjusting unit (303) for shielding the second air duct (3) 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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