CN220344367U - Air duct structure for dish washing machine and dish washing machine - Google Patents

Abstract

The utility model relates to an air duct structure for a dish washer and the dish washer, wherein the air duct structure comprises an air duct for communicating a washing cavity of the dish washer with the outside, the air duct is formed by butting a first half shell and a second half shell, a first air passing opening for fluid communication with the washing cavity of the dish washer is formed in the first half shell, and a connecting joint which is arranged adjacent to the first air passing opening and transversely extends is formed at the connecting part of the first half shell and the second half shell; the shielding piece is positioned in the air passing pipe, extends along the length direction of the connecting joint and is shielded above the connecting joint, the shielding piece faces the first air passing opening, and the top wall surface of the shielding piece is at least partially an inclined surface inclined towards the first air passing opening from top to bottom. The shielding piece shields the connecting joint, so that water with residues in the dish washer is prevented from being splashed into the air passing pipe from the first air passing opening, and the residues are blocked at the connecting joint to store water.

Description

Air duct structure for dish washing machine and dish washing machine

Technical Field

The utility model relates to the technical field of dish washers, in particular to an air duct structure for a dish washer and the dish washer.

Background

The dish washer has the advantages of good cleaning effect, capability of disinfecting tableware, time saving, labor saving and the like, so that the dish washer is widely used. When the existing dish washing machine is used for washing, at least one water is usually washed by hot water, the hot water washing temperature is above 70 ℃, and after washing, air is generally blown into the box body to dry dishes. The drying component is as in Chinese patent publication No. CN202221909462.1 (publication No. CN 218279586U), and the hot air component comprises a housing, wherein a hot air channel is formed in the housing, a heating element and a fan are arranged in the hot air channel, the fan is arranged at the air inlet of the hot air channel, the heating element is arranged at the downstream of the fan along the air flow direction, and the hot air channel at the downstream of the heating element is divided into a first hot air branch and a second hot air branch.

The housing in this patent includes an upper housing and a lower housing (i.e., two half-shells hereinafter) that are detachable from each other, and the split design of the housing is to facilitate the arrangement of a splitter plate and other components inside the housing, and the upper housing and the lower housing may be connected by a snap connection, which may easily result in an untight connection between the upper housing and the lower housing, and thus in air leakage. Therefore, the existing connection mode of adopting welding between the upper shell and the lower shell is also adopted, and the welding is that the upper shell and the lower shell are firmly connected, but the welding surface is easy to overflow to form water retaining ribs, and in the working process of the dish washer, if water with food residues in the washing cavity splashes into the shell, the water retaining ribs are easy to clamp the residues for water storage.

In addition, the dishwasher is not only provided with the hot air component for inputting air flow into the washing cavity, but also provided with the exhaust pipe for discharging the air flow in the washing cavity outwards, and the air inlet end of the exhaust pipe is communicated with the washing cavity, so that the problem that food residues enter and remain in the air inlet end of the exhaust pipe in the working process of the dishwasher can be solved.

Disclosure of Invention

The first technical problem to be solved by the utility model is to provide an air duct structure for a dish washer, which can prevent slag from being stored in the joint of two half shells.

The second technical problem to be solved by the utility model is to provide a dish washer applying the air duct structure aiming at the current state of the art.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: an air duct structure for a dish washer, comprising

The air passing pipe is used for communicating a washing cavity of the dish washer with the outside, the air passing pipe is formed by butting a first half shell and a second half shell, a first air passing opening used for being in fluid communication with the washing cavity of the dish washer is formed in the first half shell, and a connecting joint which is arranged adjacent to the first air passing opening and transversely extends is formed at the connecting part of the first half shell and the second half shell;

characterized in that it also comprises

The shielding piece is positioned in the air passing pipe, extends along the length direction of the connecting joint and is shielded above the connecting joint, the shielding piece faces the first air passing opening, and the top wall surface of the shielding piece is at least partially an inclined surface inclined towards the first air passing opening from top to bottom.

In order to prevent water or residues from remaining on the shielding piece, the inner wall surface of the second half shell, which faces the first air port, is partially provided with a second inclined surface which is inclined towards the first air port from top to bottom, and the bottom of the second inclined surface is connected with the top wall surface of the shielding piece. In the cleaning process of the dish washer, water is sprayed onto the second inclined plane from the first air outlet, and the water flow speed is accelerated by utilizing the gradient of the second inclined plane so as to wash the shielding piece and wash residues on the shielding piece down. Preferably, the angle between the second inclined surface and the top wall surface of the shielding member is 120 degrees.

In order to enable water left on the shielding piece to smoothly flow into the first air passing hole, the height of the bottom wall surface of the first air passing hole is lower than that of the second side edge of the shielding piece, and the inner wall surface between the second side edge of the shielding piece and the bottom wall surface of the first air passing hole in the first half shell is a first inclined surface inclined towards the first air passing hole from top to bottom. After flowing down from the shielding member, the water flows into the first air passing opening along the first inclined plane under the action of gravity and then returns to the washing cavity of the dish-washing machine.

In order to allow water on the shield to flow back from the first air opening into the washing chamber, a first side of the shield extending in its length direction is connected to the second half-shell, and a second side of the shield extending in its length direction is connected to the first half-shell.

The shielding piece can be arranged on the first half shell or the second half shell, preferably, the shielding piece comprises a convex rib and a component, the convex rib is arranged on the wall surface, opposite to the first air passing opening, of the second half shell, the component with an L-shaped longitudinal section is arranged in the second half shell, the lower end of the vertical part of the component is connected with the bottom wall surface of the first air passing opening, the transverse part of the component extends towards the convex rib, and under the butt joint state of the first half shell and the second half shell, the transverse part of the component and the convex rib are combined to form the top wall surface of the shielding piece. The shielding piece is designed in a split mode, one part of the shielding piece is designed on the first half shell, the other part of the shielding piece is designed on the second plate body, and when the two half shells are in butt joint, the shielding piece shields the upper portion of the connecting joint.

In order to make the layout of the air passing pipe compact, the height of the connecting seam is higher than the height of the lowest point of the first air passing hole, so that the distance between the shielding piece and the connecting seam is smaller, otherwise, if the connecting seam is lower than the lowest point of the first air passing hole, and the shielding piece faces the first air passing hole, a larger gap is formed between the shielding piece and the connecting seam.

In order to ensure a tight connection between the first half-shell and the second half-shell, the first half-shell and the second half-shell are welded.

The air passing pipe can be used for discharging the air flow in the washing cavity outwards and also can be used for flowing the external air flow into the washing cavity, and a second air passing opening which is in fluid communication with the external is formed in the air passing pipe.

In this application, along the flow direction of air current, the second air gap is located the upper reaches of first air gap, wind channel structure still includes the installation tube that links to each other with the air pipe, have inlet opening and the exhaust hole that sets gradually along the flow direction of air current on the installation tube, exhaust hole and the second air gap fluid communication of air pipe, inlet opening and external phase fluid communication, be equipped with the heating element in the installation tube. In this application, the air duct is leading-in the washing chamber with the external air current after the heating to dry the tableware.

Preferably, the mounting tube is further provided therein with a first air flow driving member for driving air flow from the air inlet hole to the air outlet hole.

The first airflow driving member may have various structural forms, preferably, the first airflow driving member is a first fan, an air inlet hole of the first fan is in fluid communication with the air inlet hole, and an air outlet hole of the first fan is in fluid communication with the air outlet hole.

The current dish washer has a mode of cavity-separating washing, namely, the washing cavity is divided into an upper cavity and a lower cavity, the two cavities can be used for independently cleaning tableware in the washing cavity, so that the number of the first air inlets on the air passing pipe is two, the air passing pipe comprises a transverse section, two diversion sections which are respectively upwards and downwards shunted from the outlet of the transverse section, the inlet of the transverse section is the second air inlet of the air passing pipe, and the two first air inlets are respectively arranged on the two diversion sections. Such that the two first air vents are in fluid communication with the two chambers, respectively.

Preferably, the downward diversion flow section extends vertically, and the first air passing opening is arranged adjacent to the lower end of the diversion section; the upward diversion section is in an inverted U shape, and the first air port on the upward diversion section is arranged at the tail end of the diversion section, so that water in the washing cavity flows back into the washing cavity again under the action of gravity after entering the air pipe from the first air port above.

In order to form two diversion sections in the air passing pipe, a transversely extending partition plate is arranged at the outlet of the transverse section in the air passing pipe, so that the part of the air passing pipe positioned at the downstream of the transverse section is divided into two diversion sections.

Preferably, the part of the air passing pipe above the partition plate is partially and inwards recessed to form a convex hull, and the convex hull is in a front-tip and rear-round drop shape along the flow direction of the air flow. The convex hull is designed to avoid the screw on the outer side wall of the dish washer, and meanwhile, the convex hull is in a drop shape, and the fluid loss is small.

Preferably, the cross-sectional areas of the two said diverging sections increase gradually in the direction of flow of the gas flow. The expansion type runner is formed, the flow velocity in the diversion section is reduced, the wind pressure of hot air is increased, because after the dish washer is washed, the temperature in the washing cavity is higher, the overall pressure is larger, under the condition, the back pressure at the first air passing opening is larger, if the wind speed is too fast, the pressure is insufficient, the air flow can not normally enter the washing cavity, and the back pressure at the first air passing opening also affects the design working condition of the fan and the heat dissipation efficiency of the heating element.

The utility model solves the second technical problem by adopting the technical proposal that: a dishwasher, characterized in that: the air duct structure is mounted on the outer side wall of the box body, which is provided with the through holes, and the first air passing opening is correspondingly communicated with the through holes on the washing cavity.

Compared with the prior art, the utility model has the advantages that: according to the utility model, the shielding piece is arranged in the air passing pipe, the connecting joint is shielded by the shielding piece, so that water with residues in the dish washing machine is prevented from being blocked at the connecting joint to store water after splashed into the air passing pipe from the first air passing port, and the top wall surface of the shielding piece is at least partially inclined towards the second air passing port from top to bottom, so that even if water with residues falls on the shielding piece, the water with residues flows back into a washing cavity of the dish washing machine from the first air passing port under the action of gravity and the impact of water flow.

Drawings

Fig. 1 is a schematic structural view of a dishwasher in accordance with an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of FIG. 1 with the door body removed;

FIG. 3 is an exploded view of FIG. 1;

FIG. 4 is a schematic structural view of the air duct structure in FIG. 3;

FIG. 5 is a schematic view of the structure of FIG. 4 in another direction;

FIG. 6 is an exploded view of FIG. 5;

FIG. 7 is a longitudinal cross-sectional view of FIG. 6 at a first tuyere;

FIG. 8 is another exploded view of FIG. 5;

FIG. 9 is an exploded view of the other direction of FIG. 8;

fig. 10 is an enlarged view at B in fig. 8;

FIG. 11 is an enlarged view at C in FIG. 9;

fig. 12 is a partial schematic view of the structure of fig. 6.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 12, the dishwasher of the preferred embodiment includes a cabinet 1 having a washing chamber 11 inside the cabinet 1 and a duct structure a having a through hole 12 communicating with the washing chamber 11 formed in the cabinet 1, the duct structure a including a ventilation duct 2 and an installation duct 3, both of the ventilation duct 2 and the installation duct 3 being installed on an outer side wall of the cabinet 1 having the through hole 12.

The air passing pipe 2 is used for communicating the washing chamber 11 of the dishwasher with the outside, in this embodiment, the air passing pipe 2 is used for discharging the air flow from the outside into the washing chamber 11, and of course, the air flow in the washing chamber 11 can also be discharged to the outside through the air pipe 2.

The air passing pipe 2 is formed by welding a first half shell 21 and a second half shell 22, a first air passing opening 23 is formed in the first half shell 21, the first air passing opening 23 is correspondingly communicated with the through hole 12 in the washing cavity 11, namely, the first air passing opening 23 is in fluid communication with the washing cavity 11 of the dish washer.

The junction of the first half-shell 21 and the second half-shell 22 is locally a connecting seam 24 arranged adjacent to the first air outlet 23 and extending transversely. The shielding member 5 is arranged in the air passing pipe 2, the shielding member 5 extends along the length direction of the connecting seam 24 and is shielded above the connecting seam 24, the shielding member 5 comprises a convex rib 51 and a member 52, the convex rib 51 is arranged on the wall surface of the second half shell 22 facing the first air passing opening 23, the member 52 with the L-shaped longitudinal section is arranged in the second half shell 22, the lower end of the vertical part 521 of the member 52 is connected with the bottom wall surface of the first air passing opening 23, the transverse part 522 of the member 52 extends towards the convex rib 51, the transverse part 522 of the member 52 and the convex rib 51 are combined to form the top wall surface of the shielding member 5 in the abutting joint state of the first half shell 21 and the second half shell 22, and the top wall surface of the shielding member 5 is at least partially an inclined surface inclined towards the first air passing opening 23 from top to bottom.

In other words, the first side of the shutter 5 in its length direction is connected to the second half-shell 22, and the second side of the shutter 5 in its length direction is connected to the first half-shell 21 opposite to the first air passage 23.

The bottom wall surface of the first air port 23 is located at a lower level than the second side edge of the shielding member 5, and the inner wall surface of the first half shell 21 located between the second side edge of the shielding member 5 and the bottom wall surface of the first air port 23 is a first inclined surface 211 inclined toward the first air port 23 from top to bottom. After flowing down from the shielding member 5, the water flows into the first air passing opening 23 along the first inclined surface 211 under the action of gravity and then returns into the washing chamber 11 of the dish washer, so that the water left on the shielding member 5 can smoothly flow into the first air passing opening 23.

In addition, the inner wall surface of the second half shell 22 facing the first air port 23 is partially formed with a second inclined surface 221 inclined toward the first air port 23 from top to bottom, and the bottom of the second inclined surface 221 is engaged with the top wall surface of the shutter 5. Thus, during the washing process of the dish washer, water is injected onto the second inclined plane 221 from the first air outlet 23, and the water flow speed is accelerated by the gradient of the second inclined plane 221 so as to wash the shielding member 5, and the residues on the shielding member 5 are washed down. Preferably, the second inclined surface 221 is at an angle of 120 ° to the top wall surface of the shutter 5 to prevent water or residue from remaining on the shutter 5.

The height of the connecting seam 24 is higher than the height of the lowest point of the first air gap 23, so that the distance between the shielding member 5 and the connecting seam 24 is smaller, otherwise if the connecting seam 24 is lower than the lowest point of the first air gap 23 and the shielding member 5 faces the first air gap 23, a larger gap is formed between the shielding member 5 and the connecting seam 24, and the layout is not compact enough.

The second air passing opening 25 which is in fluid communication with the outside is arranged on the air passing pipe 2, the second air passing opening 25 is positioned at the upstream of the first air passing opening 23 along the flowing direction of the air flow, the air inlet hole 31 and the air outlet hole 32 which are sequentially arranged along the flowing direction of the air flow are arranged on the mounting pipe 3, the air inlet hole 31 is in fluid communication with the outside, the air outlet hole 32 is in fluid communication with the second air passing opening 25 of the air passing pipe 2, and the air passing opening is specifically: one pipe orifice of the mounting pipe 3 is used as an exhaust hole 32, one pipe orifice of the air passing pipe 2 is used as a second air passing hole 25, and the part of the mounting pipe 3 corresponding to the exhaust hole 32 is inserted and assembled with the part of the air passing pipe 2 corresponding to the second air passing hole 25.

The installation tube 3 is provided with a heating element 4 and a first airflow driving element 6, the heating element 4 can adopt the existing PTC heating element 4, the first airflow driving element 6 is used for driving airflow from the air inlet hole 31 to the air outlet hole 32, in this embodiment, the first airflow driving element 6 is a first fan, an air inlet hole of the first fan is in fluid communication with the air inlet hole 31, and an air outlet hole of the first fan is in fluid communication with the air outlet hole 32.

The current dish washer has a cavity-separating washing mode, namely, the washing cavity 11 is divided into an upper cavity and a lower cavity, and the two cavities can be used for independently washing tableware in the washing cavity, so as to be shown in fig. 8, two first air passing openings 23 are arranged on the air passing pipe 2, the air passing pipe 2 comprises a transverse section 26, a partition plate 27 which transversely extends is arranged at the outlet of the transverse section 26 in the air passing pipe 2, so that the part of the air passing pipe 2 positioned at the downstream of the transverse section 26 is divided into two diversion sections 28, the two diversion sections 28 are respectively upwards and downwards shunted from the outlet of the transverse section 26, the inlet of the transverse section 26 is the second air passing opening 25 of the air passing pipe 2, the two first air passing openings 23 are respectively arranged on the two diversion sections 28, corresponding through holes 12 on the box body 1 are also provided with two upper and lower partition plates which are respectively correspondingly communicated with the two through holes 12 in a fluid manner.

Wherein the downwardly diverging flow distribution section 28 extends vertically with the first air opening 23 thereon disposed adjacent the lower end of the flow distribution section 28; the upwardly diverted flow section 28 is of inverted U-shape, with the first air opening 23 at the end of the flow section 28, so that water in the washing chamber 11 flows back into the washing chamber 11 under the force of gravity after entering the air duct 2 from the upper first air opening 23.

The cross-sectional area of the two flow dividing sections 28 gradually increases in the flow direction of the air flow, and in this embodiment, the cross-sectional area of the upstream end of the flow dividing section 28 is half the cross-sectional area of the downstream end. An expanded flow passage is formed in this way, which aims to reduce the flow velocity in the flow dividing section 28 and increase the wind pressure of hot air, because the temperature in the washing cavity 11 is higher and the overall pressure is larger after the washing of the dish washer is finished, in this case, the back pressure at the first air passing opening 23 is larger, if the wind speed is too fast and the pressure is insufficient, the air flow cannot normally enter the washing cavity 11, and the back pressure at the first air passing opening 23 also affects the design working condition of the fan and the heat dissipation efficiency of the heating element 4.

The part of the air passing pipe 2 above the partition plate 27 is partially and inwards recessed to form a convex hull 29, and the convex hull 29 is in a front-tip and rear-round drop shape along the flow direction of the air flow. The convex hull 29 is designed to avoid screws on the outer side wall of the dish washer, and meanwhile, the convex hull 29 is in a drop shape, so that the fluid loss is small.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity.

The term "fluid communication" as used herein refers to a spatial positional relationship between two components or parts (hereinafter collectively referred to as a first part and a second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow along a flow path from the first part to the second part or/and be transported to the second part, or the first part and the second part may be directly communicated with each other, or the first part and the second part may be indirectly communicated with each other through at least one third party, and the third party may be a fluid channel such as a pipe, a channel, a conduit, a flow guiding member, a hole, a groove, or the like, or a chamber allowing the fluid to flow through, or a combination thereof.

Claims (17)

1. An air duct structure for a dish washer, comprising

The air passing pipe (2) is used for communicating a washing cavity (11) of the dish washer with the outside, the air passing pipe (2) is formed by butting a first half shell (21) and a second half shell (22), a first air passing opening (23) used for being in fluid communication with the washing cavity (11) of the dish washer is formed in the first half shell (21), and a connecting joint (24) which is arranged adjacent to the first air passing opening (23) and transversely extends is formed at the connecting part of the first half shell (21) and the second half shell (22);

characterized in that it also comprises

The shielding piece (5) is positioned in the air passing pipe (2), the shielding piece (5) extends along the length direction of the connecting seam (24) and is shielded above the connecting seam (24), the shielding piece (5) faces the first air passing opening (23), and the top wall surface of the shielding piece (5) is at least partially an inclined surface inclined towards the first air passing opening (23) from top to bottom.

2. The duct structure of claim 1, wherein: the inner wall surface of the second half shell (22) facing the first air port (23) is partially provided with a second inclined surface (221) inclined towards the first air port (23) from top to bottom, and the bottom of the second inclined surface (221) is connected with the top wall surface of the shielding piece (5).

3. The duct structure of claim 1, wherein: the first side edge of the shielding element (5) extending along the length direction thereof is connected with the second half-shell (22), and the second side edge of the shielding element (5) extending along the length direction thereof is connected with the first half-shell (21).

4. A duct structure according to claim 3, wherein: the bottom wall surface of the first air passing opening (23) is lower than the second side edge of the shielding piece (5), and the inner wall surface of the first half shell (21) between the second side edge of the shielding piece (5) and the bottom wall surface of the first air passing opening (23) is a first inclined surface (211) inclined towards the first air passing opening (23) from top to bottom.

5. The duct structure of claim 4, wherein: the shielding piece (5) comprises a convex rib (51) and a component (52), the convex rib (51) is arranged on the wall surface, facing the first air passing opening (23), of the second half shell (22), the component (52) with the L-shaped longitudinal section is arranged in the second half shell (22), the lower end of the vertical portion (521) of the component (52) is connected with the bottom wall surface of the first air passing opening (23), the transverse portion (522) of the component (52) extends towards the convex rib (51), and the transverse portion (522) of the component (52) and the convex rib (51) are combined to form the top wall surface of the shielding piece (5) under the butt joint state of the first half shell (21) and the second half shell (22).

6. The duct structure of claim 1, wherein: the height of the connecting seam (24) is higher than the height of the lowest point of the first air passing opening (23).

7. The duct structure of claim 1, wherein: the first half-shell (21) and the second half-shell (22) are welded.

8. The duct structure of any one of claims 1-7, wherein: the air passing pipe (2) is provided with a second air passing opening (25) which is in fluid communication with the outside.

9. The duct structure of claim 8, wherein: along the flow direction of air current, second air gap (25) are located the upper reaches of first air gap (23), wind channel structure (A) still include with install pipe (3) that cross tuber pipe (2) and link to each other, have inlet opening (31) and exhaust hole (32) that set gradually along the flow direction of air current on install pipe (3), exhaust hole (32) and second air gap (25) of crossing tuber pipe (2) fluid communication, inlet opening (31) and external fluid communication, be equipped with heating member (4) in install pipe (3).

10. The duct structure of claim 9, wherein: the installation pipe (3) is also provided with a first airflow driving piece (6) for driving airflow from the air inlet hole (31) to the air outlet hole (32).

11. The duct structure of claim 10, wherein: the first airflow driving piece (6) is a first fan, an air inlet hole of the first fan is in fluid communication with the air inlet hole (31), and an air outlet hole of the first fan is in fluid communication with the air outlet hole (32).

12. The duct structure of any one of claims 1-7, wherein: the air conditioner is characterized in that two first air inlets (23) are formed in the air passing pipe (2), the air passing pipe (2) comprises a transverse section (26), and two diversion sections (28) which are upwards and downwards diverted from an outlet of the transverse section (26), an inlet of the transverse section (26) is the second air inlets (25) of the air passing pipe (2), and the two first air inlets (23) are respectively formed in the two diversion sections (28).

13. The duct structure of claim 12, wherein: wherein the downward diversion flow diversion section (28) extends vertically, and the first air passing opening (23) thereon is arranged adjacent to the lower end of the diversion section (28); the upward diversion section (28) is in an inverted U shape, and the first air passing opening (23) is arranged at the tail end of the diversion section (28).

14. The duct structure of claim 12, wherein: a partition plate (27) is arranged at the outlet of the transverse section (26) in the air passing pipe (2), so that the part of the air passing pipe (2) positioned at the downstream of the transverse section (26) is divided into two diversion sections (28).

15. The duct structure of claim 12, wherein: the air passing pipe (2) is partially and inwards recessed to form a convex hull (29), the convex hull (29) is positioned in one of the diversion sections (28), and the convex hull (29) is in a front-tip and rear-round drop shape along the flow direction of air flow.

16. The duct structure of claim 12, wherein: the cross-sectional areas of the two said flow dividing sections (28) increase gradually in the direction of flow of the air stream.

17. A dishwasher, characterized in that: the air duct structure (A) comprises a box body (1) and any one of claims 1 to 16, wherein a washing cavity (11) is formed in the box body (1), a through hole (12) communicated with the washing cavity (11) is formed in the box body (1), the air duct structure (A) is mounted on the outer side wall of the box body (1) provided with the through hole (12), and the first air outlet (23) is correspondingly communicated with the through hole (12) in the washing cavity (11).