KR20230130903A - Dish washer - Google Patents

Abstract

The present invention is configured so that the airflow guide is integrally equipped with a means for limiting relative displacement or state movement between the airflow guide and the connecting duct portion to which the airflow guide is coupled, thereby stably supporting the airflow guide without adding a separate member. It is about a dishwasher that can effectively prevent rattling.

Description

Dishwasher {DISH WASHER}

The present invention relates to a dishwasher. More specifically, the present invention relates to a dishwasher, and more specifically, the airflow guide is configured to be integrally equipped with a means for limiting relative displacement or state movement between the airflow guide and the connecting duct portion to which the airflow guide is coupled. This relates to a dishwasher that can stably support the airflow guide and effectively prevent rattling without adding additional members.

A dishwasher is a device that sprays washing water such as water to wash dishes and cooking utensils stored inside. At this time, the washing water used for washing may contain detergent.

A dishwasher includes a washing tank that forms a washing space, a storage unit that accommodates the washing object inside the washing tank, a spray arm that sprays washing water into the storage unit, and a sump that stores water and supplies wash water to the spray arm. It is common to be

By using such a dishwasher, the time and effort required to wash dishes such as dishes after a meal can be reduced, contributing to user convenience.

Typically, a dishwasher is configured to perform a washing cycle for washing the object to be washed, a rinse cycle for rinsing the object to be washed, and a drying cycle for drying the object for which washing and rinsing have been completed.

Recently, dishwashers have been released that can reduce drying time and improve the sterilization effect of objects to be washed by supplying high-temperature drying air to the inside of the washing tank during the drying cycle.

In this regard, German Patent Publication No. 102015212869 (Prior Document 001) discloses a dishwasher equipped with a hot air supply device that generates and supplies high-temperature drying air after the washing and rinsing processes are completed.

The dishwasher disclosed in prior document 001 is configured to have a dry air injection unit disposed inside the tub for spraying dry wind generated through a hot air supply device disposed at the bottom of the tub into the interior of the tub.

The dry air injection unit is configured to be fastened to a hot air supply pipe extending through the tub.

At this time, the dry air injection unit can be fastened to the hot air supply pipe through a simple press-fit operation, thereby simplifying the assembly or fastening process.

However, prior document 001 has the problem that if a fairly high and strict manufacturing tolerance is not maintained for the dry wind blowing part and the hot air supply pipe, relative displacement due to clearance in the vertical direction or rattling due to state movement may occur.

In addition, prior document 001 states that if a predetermined level or higher of rigidity is not secured at the connection between the dry air blower and the hot air supply pipe, when a fairly strong impact is applied, the dry air blower can easily move upward and downward from its correct position due to the impact. There is a very high possibility that it will escape.

In addition, prior document 001 states that if a certain level of rigidity or higher is not secured at the connection between the dry air injection unit and the hot air supply pipe, the connection between the dry air injection unit and the hot air supply pipe may be easily damaged by the impact when a fairly strong impact is applied. There is a high probability that there will be a problem.

German Patent Publication No. 102015212869

The present invention was devised to solve the problems of the prior art described above, and the airflow guide is provided with a means for limiting relative displacement or state movement between the airflow guide and the connecting duct portion to which the airflow guide is coupled. The first purpose is to provide a dishwasher that can stably support the airflow guide and effectively prevent rattling without adding additional members.

In addition, the present invention is configured so that when a downward relative displacement or relative movement of the airflow guide occurs, the threaded part integrally provided in the connecting duct is divided at least in three places and supported at three points, so that even if a fairly strong external force occurs, the airflow guide The second purpose is to provide a dishwasher that can effectively be removed from its home position.

In addition, the present invention is configured so that when downward relative displacement or relative movement of the airflow guide occurs, the threaded part integrally provided in the connection duct is divided at least in three places and supported at three points, so that the external force is divided in at least three places and connected. The third purpose is to provide a dishwasher that can effectively prevent damage to the airflow guide and connecting duct portion because it is transmitted to the duct portion.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

A dishwasher according to the present invention includes a tub storing objects to be washed and having a washing space with an open front; a drying wind supply unit disposed on a lower side of the tub and generating drying wind for drying the washing object; and an airflow guide that switches the flow direction of the drying wind supplied from the drying air supply unit and supplies it to the washing space, wherein the drying air supply unit has an upper end extending upwardly through the lower surface of the tub and the drying air supply unit. It includes a connection duct part that supplies wind into the interior of the air flow guide, and the air flow guide is detachably coupled to the upper end of the connection duct part. When coupling to the connection duct part is completed, the air flow guide is attached to the connection duct part. It is characterized in that downward relative movement is limited by a male thread provided on the outer peripheral surface.

In addition, the airflow guide includes a cylindrical duct coupling portion into which the upper end of the connecting duct portion is inserted and coupled, and the relative movement of the duct coupling portion in the downward direction may be limited by the male thread portion.

In addition, at the bottom of the duct coupling portion, at least one protruding rib is integrally formed to protrude downward toward the male screw portion, and when the relative movement in the downward direction occurs, the lower end of the at least one protruding rib is It may come into contact with the male thread.

In addition, when the coupling of the duct coupling portion and the connecting duct portion is completed, a gap having a predetermined width is formed between the lower end surface of the at least one protruding rib and the male thread portion, and the downward relative movement is performed according to the predetermined width. It may be limited to less than the width.

Additionally, the at least one protruding rib may include a first protruding rib, a second protruding rib, and a third protruding rib disposed at equal intervals around a circular opening through which an upper end of the connection duct part passes.

Additionally, the heights at which the first protruding rib, the second protruding rib, and the third protruding rib respectively protrude downward from the bottom of the duct coupling portion may be different from each other.

In addition, the maximum height at which the first protruding rib protrudes from the bottom of the duct joint is the first height, and the maximum height at which the second protrusion rib protrudes from the bottom of the duct joint is a second height greater than the first height. The maximum height at which the third protruding rib protrudes from the bottom of the duct coupling portion may be a third height greater than the second height.

Additionally, the circumferential width of the first protruding rib, the circumferential width of the second protruding rib, and the circumferential width of the third protruding rib may be equal to each other.

Additionally, when viewed from the upper side of the airflow guide, the first protruding rib, the second protruding rib, and the third protruding rib may be arranged at the bottom of the connection duct portion in a clockwise direction.

In addition, the bottom surface of the first protruding rib, the bottom surface of the second protrusion rib, and the bottom surface of the third protrusion rib increase in height protruding from the bottom of the duct coupling portion as each moves clockwise. It can be a slope.

In addition, the dry air supply unit further includes a fastening nut that is screwed to the male thread part of the connection duct unit to secure the connection duct unit to the lower surface of the tub, and when the coupling of the duct coupling unit and the connection duct unit is completed, The at least one protruding rib may be in a non-contact state with respect to the fastening nut.

Additionally, the maximum radial width of the at least one protruding rib may be smaller than the gap between the outer peripheral surface of the connection duct portion and the inner peripheral surface of the fastening nut.

Additionally, at least one of the at least one protruding rib may be inserted into the fastening nut.

Additionally, the duct coupling portion may be coupled to the connecting duct portion through a two-step coupling operation.

In addition, the two-step coupling operation includes a vertical movement operation of relatively moving the airflow guide in a downward direction; and a rotational movement operation of relatively moving the airflow guide in the circumferential direction after the vertical movement operation is completed.

Additionally, when the rotational movement operation is initiated, the gap between the lower end surface of the at least one protruding rib and the male thread portion may gradually decrease.

Additionally, when the rotational movement operation is initiated, the airflow guide may be rotated in a direction opposite to the rotation direction for screwing the fastening nut to the male thread portion of the connection duct portion.

In addition, on the inner peripheral surface of the duct joint, a first guide groove extends linearly in the vertical direction, and a second guide groove whose one end is integrally connected to the upper end of the first guide groove and extends in an arc shape along the circumferential direction is formed, and on the outer peripheral surface of the connection duct portion, a guide protrusion that protrudes toward the inner peripheral surface of the connection duct portion and moves along the first guide groove and the second guide groove during the two-step coupling operation may be provided. You can.

Additionally, the vertical movement operation may be guided while the guide projection is inserted into the first guide groove, and the rotational movement operation may be guided while the guide projection is inserted into the second guide groove.

Additionally, when the rotational movement operation is completed, the upward relative movement of the guide protrusion of the duct coupling portion may be restricted by the second guide groove.

The dishwasher according to the present invention has the effect of effectively preventing washing water from flowing back through the discharge port directly exposed to the washing space.

In addition, the dishwasher according to the present invention has a simple structure that effectively prevents the airflow guide from loosening from its set position or rattling after being assembled and fixed to the drying air supply unit.

Additionally, in the dishwasher according to the present invention, the air flow guide can be effectively prevented from being displaced from its original position or damaged due to external impact after it is assembled and fixed to the drying air supply unit.

In addition, the dishwasher according to the present invention is configured to expose the lower surface of the fastening nut to the washing space to prevent washing water from remaining between the fastening nut and the tub, thereby effectively preventing corrosion of the tub and the drying air supply hole. , It has the effect of effectively preventing bacterial growth and odor generation between the tub and the fastening nut.

In addition to the above-described effects, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

1 is a front perspective view of a dishwasher according to an embodiment of the present invention.
Figure 2 is a schematic cross-sectional view of the dishwasher shown in Figure 1.
Figure 3 is a front perspective view showing a state in which the drying air supply unit of a dishwasher according to an embodiment of the present invention is accommodated in the base.
Figure 4 is an exploded perspective view of the drying wind supply unit shown in Figure 3.
Figures 5 and 6 are front perspective views showing a state in which the bottom tub is coupled to Figure 3.
Figure 7 is a plan view of Figure 5.
Figure 8 is a cross-sectional view of Figure 7 cut along AA.
Figure 9 is a plan view for explaining the relative positional relationship between the lower rack and the bottom tub with respect to the airflow guide of the dishwasher according to an embodiment of the present invention.
Figure 10 is a partially enlarged view of Figure 9 cut in a direction parallel to the front and rear directions.
Figure 11 is an exploded perspective view of the airflow guide and connection duct portion of a dishwasher according to an embodiment of the present invention.
Figure 12 is a side view of the upper guide shown in Figure 11, and Figure 13 is a rear view.
Figure 14 is a rear perspective view of the lower guide shown in Figure 11, Figure 15 is a front perspective view, and Figure 16 is a bottom perspective view.
Figure 17 is a cross-sectional view showing the connection state between the connection duct portion and the lower guide.
Figure 18 is a vertical cross-sectional view showing the cross-section of the airflow guide coupled to the connection duct portion.
Figure 19 is a horizontal cross-sectional view showing the airflow guide coupled to the connection duct portion.
Figures 20 to 22 are a plan view and a front view showing the process of assembling the airflow guide of a dishwasher to the connection duct portion according to an embodiment of the present invention.
Figure 23 is a partial enlarged view showing the airflow guide in a state in which assembly has been completed on the connection duct portion.
Figure 24 is a partially enlarged view of the connecting duct portion where the airflow guide is assembled.
FIGS. 25 to 27 are cross-sectional views showing the airflow guide, connection duct portion, and bottom tub shown in FIG. 23 cut at different positions.
Figure 28 is a cross-sectional view showing a vertical cross-section of a fastening nut of a dishwasher according to an embodiment of the present invention.
FIG. 29 is a vertical cross-sectional view showing the relationship between the fastening nut and the bottom tub shown in FIG. 28.

The above-mentioned objects, features, and advantages will be described in detail later with reference to the attached drawings, so that those skilled in the art will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, identical reference numerals are used to indicate identical or similar components.

Although first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another component, and unless specifically stated to the contrary, the first component may also be a second component.

Throughout the specification, unless otherwise stated, each element may be singular or plural.

Hereinafter, the “top (or bottom)” of a component or the arrangement of any component on the “top (or bottom)” of a component means that any component is placed in contact with the top (or bottom) of the component. Additionally, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Additionally, when a component is described as being “connected,” “coupled,” or “connected” to another component, the components may be directly connected or connected to each other, but the other component is “interposed” between each component. It should be understood that “or, each component may be “connected,” “combined,” or “connected” through other components.

As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, terms such as “consists of” or “comprises” should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or steps may include It may not be included, or it should be interpreted as including additional components or steps.

Additionally, as used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. In the present application, terms such as “consists of” or “comprises” should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or steps may include It may not be included, or it should be interpreted as including additional components or steps.

Throughout the specification, when referred to as “A and/or B”, this means A, B or A and B, unless specifically stated to the contrary, and when referred to as “C to D”, this means unless specifically stated to the contrary. Unless there is one, it means that it is C or higher and D or lower.

Hereinafter, the present invention will be described with reference to drawings showing the configuration of the dishwasher 1 according to an embodiment of the present invention.

[Overall structure of the dishwasher]

Hereinafter, the overall structure of the dishwasher 1 according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a front perspective view showing a dishwasher according to the present invention, and Figure 2 is a simplified cross-sectional view briefly showing the internal structure of the dishwasher according to the present invention.

As shown in Figures 1 and 2, the dishwasher 1 according to the present invention includes a case 10 forming the outer shape, and a washing space 21 installed inside the case 10 where the washing object is washed. forming a tub 20 whose front is open, a door 30 that opens and closes the open front of the tub 20, and located at the lower part of the tub 20 to supply and collect washing water for washing objects. A driving unit 40 for circulation and drainage, a storage unit 50 that is detachably provided in the internal washing space 21 of the tub 20 and where a cleaning object is placed, and is installed adjacent to the storage unit 50. and is provided with a spray unit 60 that sprays washing water for washing the object.

At this time, the object to be washed seated in the storage unit 50 may be, for example, dishes such as bowls, plates, spoons, and chopsticks, and other cooking utensils. Hereinafter, unless otherwise specified, objects to be washed will be referred to as dishes.

The tub 20 may be formed in a box shape with an entirely open front, and corresponds to a configuration known as a so-called washing tank.

A washing space 21 is formed inside the tub 20, and the open front can be opened and closed by the door 30.

The tub 20 may be formed through press processing of a metal plate resistant to high temperature and moisture, for example, a stainless steel plate.

In addition, on the inner surface of the tub 20, a plurality of brackets are disposed for the purpose of supporting and installing functional components such as the storage portion 50 and the spray portion 60, which will be described later, within the tub 20. It can be.

Meanwhile, the driving unit 40 includes a sump 41 that stores washing water, a sump cover 42 that separates the sump 41 from the tub 20, and a water supply unit that supplies washing water to the sump 41 from the outside. (43), a drain unit 44 for discharging the washing water of the sump 41 to the outside, a water pump 45 and a supply passage 46 for supplying the washing water of the sump 41 to the spray unit 60. It may be configured to include.

The sump cover 42 is disposed on the upper side of the sump 41 and may serve to distinguish the tub 20 and the sump 41. Additionally, the sump cover 42 may be provided with a plurality of recovery holes for recovering the washing water sprayed into the washing space 21 through the spray unit 60 to the sump 41.

That is, the washing water sprayed from the spray unit 60 towards the dishes falls to the bottom of the washing space 21 and can be recovered back to the sump 41 through the sump cover 42.

The water pump 45 is provided on the side or bottom of the sump 41 and serves to pressurize the washing water and supply it to the spray unit 60.

One end of the water pump 45 may be connected to the sump 41 and the other end may be connected to the supply passage 46. The water pump 45 may be equipped with an impeller 451 and a motor 453. When power is supplied to the motor 453, the impeller 451 rotates, and the washing water in the sump 41 is pressurized and can be supplied to the spray unit 60 through the supply passage 46.

Meanwhile, the supply passage 46 may serve to selectively supply the washing water supplied from the water pump 45 to the spray unit 60.

Exemplarily, the supply passage 46 includes a first supply passage 461 connected to the lower injection arm 61, a second supply passage 463 connected to the upper injection arm 62, and the top nozzle 63. This can be done, and the supply passage 46 may be provided with a supply passage switching valve 465 that selectively opens and closes the supply passages 461 and 463.

At this time, the supply passage switching valve 465 may be controlled to open each of the supply passages 461 and 463 sequentially or simultaneously.

Meanwhile, the spray unit 60 is provided to spray washing water on dishes stored in the storage unit 50, etc.

More specifically, the spray unit 60 is located at the bottom of the tub 20 and is located between the lower spray arm 61 that sprays washing water to the lower rack 51, and the lower rack 51 and the upper rack 52. An upper spray arm (62) is located and sprays wash water to the lower rack (51) and upper rack (52), and is located at the top of the tub (20) and sprays wash water to the top rack (53) or upper rack (52). It may include a top nozzle 63.

In particular, the lower spray arm 61 and the upper spray arm 62 are rotatably provided in the washing space 21 of the tub 20 and can spray washing water while rotating toward the dishes in the storage unit 50.

The lower spray arm 61 may be rotatably supported on the upper side of the sump cover 42 so that it can spray washing water while rotating toward the lower rack 51 from the bottom of the lower rack 51.

Additionally, the upper spray arm 62 may be rotatably supported by the spray arm holder 467 so that it can spray washing water while rotating between the lower rack 51 and the upper rack 52.

Meanwhile, the lower surface 25 of the tub 20 may be further provided with means for diverting the washing water sprayed from the lower spray arm 61 to the upward direction (U-direction) in order to increase washing efficiency.

Since the detailed configuration of the injection unit 60 can be applied to a configuration already known in the art, description of the specific configuration of the injection unit 60 will be omitted below.

Meanwhile, the washing space 21 may be provided with a storage unit 50 for storing dishes.

The storage unit 50 is provided to be withdrawn from the inside of the tub 20 through the open front of the tub 20 .

For example, in FIG. 2, a lower rack 51 is located at the lower part of the tub 20 and can accommodate relatively large dishes, and an upper rack 51 is located on the upper side of the lower rack 51 and can accommodate medium-sized dishes. An embodiment is shown in which a storage unit including a rack 52 and a top rack 53 located at the top of the tub 20 and capable of storing small dishes, etc. is shown. The present invention is not limited to this, but will be described based on an embodiment of a dishwasher provided with three storage units 50 as shown.

These lower racks 51, upper racks 53, and top racks 53 may each be configured to pass through the open front of the tub 20 and be drawn out.

To this end, guide rails (not shown) may be provided on both walls forming the inner peripheral surface of the tub 20. For example, the guide rails may include an upper rail, a lower rail, and a top rail.

Wheels may be provided below the lower rack 51, upper rack 53, and top rack 53, respectively. The user can store dishes in the lower rack 51, upper rack 53, and top rack 53 by pulling them out through the front of the tub 20, or easily remove washed dishes from them. You can take it out.

The guide rail 54 is a fixed guide rail in the form of a simple rail for guiding the withdrawal and insertion of the injection unit 60, or guides the withdrawal and storage of the injection unit 60, and the withdrawal distance according to the withdrawal of the injection unit 60. It can be provided as a telescopic guide rail that increases.

Meanwhile, the door 30 has the purpose of opening and closing the open front of the tub 20 described above.

A hinge part (not shown) for opening and closing the door 30 is provided at the lower part of the normally open front, and the door 30 is opened by rotating around the hinge part as a rotation axis.

Here, a handle 31 for opening the door 30 and a control panel 32 for controlling the dishwasher 1 may be provided on the outer surface of the door 30.

As shown, the control panel 32 includes a display 33 that visually displays information about the current operating status of the dishwasher, a selection button for inputting the user's selection operation, and a button for turning the power of the dishwasher on and off. A button unit 34 including a power button through which a user's operation is input may be provided.

Meanwhile, the inner surface of the door 30 forms one side of the tub 20 when the door 30 is closed, and is supported by the lower rack 51 of the storage unit 50 when the door 30 is fully opened. A possible seating surface can be formed.

To this end, when the door 30 is fully opened, it is preferable that the inner surface of the door 30 forms a horizontal surface in the same direction as the direction in which the guide rail 54 along which the lower rack 51 is guided extends.

As shown in FIG. 2, an automatic door opening module 352 may be provided on the outside of the upper surface of the tub 20 to automatically open the door.

The automatic door opening module 352 moves the door 30 to a predetermined open position when the dry air supply unit 80, which will be described later, operates and supplies dry air to the inside of the tub 20, thereby opening the front of the tub 20. It plays a role in partially opening (22).

Therefore, the air that becomes humid while drying dishes can be discharged through the upper front side 22 of the open tub 20.

As an example, the automatic door opening module 352 may be provided with a push rod 3524 that rotates the rear top of the door 30 to the open position.

Meanwhile, a drying wind supply unit 80 may be provided at the lower part of the tub 20 to generate and supply high-temperature or low-temperature drying wind to the washing space inside the tub 20.

As shown, the dry air supply unit 80 includes a filter member 883 that filters external air, a blower fan 825 that generates a dry wind airflow, a heater 84 that heats the dry wind airflow, and a tub. It is disposed inside and may be configured to include an airflow guide 83 that guides the drying wind airflow.

A dry wind supply hole 254 may be provided on the lower surface of the tub 20 to allow high-temperature dry wind generated by the dry wind supply unit to be introduced into the interior of the tub 20.

The detailed configuration of the dry air supply unit 80 will be described later with reference to FIG. 3 and below.

[Detailed composition of dry wind supply unit]

Hereinafter, the detailed configuration of the drying air supply unit 80 described above will be described with reference to FIGS. 3 to 7.

First, as shown in FIG. 3, the drying air supply unit 80 may be arranged to be accommodated in the base 90 and supported by the bottom surface 91 of the base 90.

For example, the dry air supply unit 80 may be placed adjacent to the rear 93 of the base 90, and the base 90 is generally located between the water leak detection unit and the rear 93 of the base 90. It can be arranged side by side on the rear side 93.

This arrangement position may be selected in consideration of the characteristics of the drying wind supply unit 80, which generates high heat of approximately 100°C or more in the high-temperature drying wind supply mode. In other words, a location that avoids electrical components that are relatively affected by high heat can be selected.

Additionally, this arrangement position may be selected based on the location of the dry air supply hole 254 formed on the lower surface 25 of the tub 20. That is, in consideration of user safety, the drying wind supply hole 254 through which drying wind flows may be formed at a corner adjacent to the rear and left side of the lower surface 25 of the tub 20.

In order to effectively generate and supply drying wind to the drying wind supply hole 254 formed at this location, the drying wind supply unit 80 may be disposed on the lower side of the drying wind supply hole 254.

However, the arrangement position of the dry air supply unit 80 is only exemplary, and unlike this, it is located adjacent to the left side 94, right side 95, or front 92 rather than the rear 93 of the base 90. can be placed in The present invention is not limited to this, but will be described below based on an embodiment in which the drying air supply unit 80 is adjacent to the rear 93 of the base 90 and is arranged approximately parallel to the rear 93.

Meanwhile, on the bottom 91 of the base 90, there is a support rib (not shown) to support the dry air supply unit 80 and prevent it from coming off, and a water leak detection unit to detect whether washing water is leaking from the tub 20. It will be provided with a plurality of guide ribs (not shown) to set the position (not shown) and prevent it from deviating, and a washing water rib (not shown) to guide the washing water discharged from the dry air supply unit 80 to the water leak detection unit. You can.

Preferably, these support ribs, guide ribs, and cleaning ribs may be formed integrally on the bottom surface 91 of the base 90.

The first leg, second leg 892, and third leg 893 of the drying air supply unit 80, which will be described later, may be coupled to the support rib in a non-fastening manner. That is, the first leg, the second leg 892, and the third leg 893 are simply mounted on the support rib without a separate fastening means, and the drying air supply unit 80 is supported in the up-down, front-back, and left-right directions. It can be.

In Figure 4, the detailed configuration of the drying wind supply unit 80 is shown.

As shown, the drying wind supply unit 80, which generates drying wind and supplies it to the inside of the tub 20, includes a blowing fan that generates a drying wind airflow (F) supplied to the inside of the tub 20, and a drying wind supply unit 80 that generates drying wind and supplies it to the inside of the tub 20. It is composed of a heater 84 that heats the wind, a heater housing 81 in which an air passage is formed to accommodate the heater 84, and a filtering unit 88 that filters the air to be sucked in by the blowing fan. You can.

The blowing fan (not shown) is disposed on the upstream side in the direction of the dry wind airflow (F) with respect to the heater 84 and the heater housing 81, and blows air through an air passage formed inside the heater housing 81. It serves to accelerate and generate dry wind airflow (F).

The blower fan and the blower motor that generates the rotational driving force of the blower fan can be modularized and accommodated inside the fan housing 82 to form an assembly.

The blowing fan and the fan housing 82 may be fixed to the housing connector 87 that connects the filter housing 881 and the heater housing 81 of the filtering unit 88, which will be described later.

In more detail, the blower fan and fan housing 82 may be entirely accommodated inside the filter housing 881 while being fixed to the connection tab 872 of the housing connector 87.

There is no limitation on the type of blowing fan applied to the dry air supply unit 80, but a sirocco fan is preferable in consideration of locational and spatial constraints where the blowing fan is installed.

As shown, when a sirocco fan is applied, filtered air is sucked in from the bottom of the fan housing 82 in a direction parallel to the rotation axis from the center of the sirocco fan, and the air is accelerated toward the radial outside and discharged. .

The accelerated and discharged air forms a dry wind airflow (F) and can be introduced into the air passage inside the heater housing (81) through the fan housing (82) and the inlet (8712) of the housing connector (87).

At this time, the rotation axis 8251 of the blowing fan and motor, which is a sirocco fan, may be illustratively arranged to have a generally parallel direction in the up and down direction (U-D direction), and the filtered air may pass through the lower surface of the fan housing 82. Can be inhaled.

Meanwhile, a PCB board for controlling the motor may be built inside the upper surface 821 of the fan housing 82, which is opposite to the lower surface where the filtered air is sucked.

As shown, the fan housing 82 may be fixed to the ring-shaped connection tab 872 provided on the housing connector 87 through a fastening means such as a screw bolt (not shown).

As shown in FIGS. 7 and 8, the connection tab 872 may be provided with a pair of fastening bosses extending from the upper surface of the connection tab 872 in the upward direction (U-direction).

To support the fan housing 82 and the heater housing 81, a first leg that protrudes toward the base may be formed integrally with the lower part of the housing connector 87.

The heater 84 may be supported indirectly while being separated from the heater housing 81 and the connector body 871.

The front end of the heater 84 can be supported in a state separated from the housing connector 87 by the terminal fixing part. A pair of terminals may be fixed to the front of the terminal fixing part in a state that protrudes outward.

The rear end 871b of the housing connector 87, which is in an entirely open state, can be fixed by being fitted with the heater housing 81.

The heater 84 (FIG. 10) is disposed in an air passage formed inside the heater housing 81, and is preferably directly exposed to the dry wind airflow F inside the air passage to heat the dry wind airflow F. It plays a role.

When the drying wind supply unit 80 supplies high-temperature drying wind, power is supplied to the heater 84 to heat the drying wind. When the drying wind supply unit 80 supplies low-temperature drying wind, the heater 84 ) may be configured to stop the operation of the heater 84 by blocking the power supplied to it.

At this time, when low-temperature drying wind is supplied, the operation of the blower motor can be maintained so that the drying wind airflow (F) can be generated.

There is no limitation on the type of heater 84 provided in the drying air supply unit 80 according to an embodiment of the present invention, but as an example, it has a relatively simple structure, has excellent heat generation efficiency, and flows backward from the tub 20. A tube-shaped sheath heater can be selected, which is advantageous in preventing electric leakage due to reverse inflow washing water.

In order to increase heat exchange efficiency, the heater 84, which acts as a sheath heater, is directly exposed to the dry wind airflow (F) in the air passage inside the heater housing 81, and has a three-dimensional shape that is bent multiple times to maximize the heat transfer area. It can be configured to have.

Additionally, a pair of terminals for receiving power may be formed at one end and the other end of the heater 84.

The rear end side of the heater 84 can be fixed and supported through a single heater bracket 845 disposed inside the heater housing 81, as shown in FIG. 8. That is, the rear end of the heater 84 can be supported on the air passage while being separated from the heater housing 81 through the heater bracket 845.

Meanwhile, a temperature sensor may be provided on the upper side of the heater housing 81 as a temperature sensing unit 86 to detect the temperature of the high-temperature dry wind generated through the heater 84 or to detect whether the heater 84 is overheated. .

For example, the temperature sensor may include a thermistor that detects the temperature of the drying wind and a thermostat that detects whether the heater 84 is overheated.

The output signal of the temperature sensor can be transmitted to a control unit (not shown), and the control unit can receive the output signal of the temperature sensor and determine the temperature of the high-temperature drying wind and whether it is overheated. When overheating occurs, the control unit can cut off the power supply to the heater 84 and change the operating mode of the drying wind supply unit 80 from the high-temperature drying wind supply mode to the low-temperature drying air supply mode.

Meanwhile, the heater housing 81 may be formed in a hollow shape with an empty space inside so that an air passage through which the above-described heater 84 and the heater bracket 845 are disposed is formed.

At this time, the front end of the heater housing 81 corresponding to the upstream side and the rear end corresponding to the downstream side are at least partially opened so that the dry wind air current F can move. It can be.

On the other hand, the dry air supply unit 80 is coupled to an outlet formed by opening upwardly (U-direction) on the left end side of the heater housing 81 and includes a connection duct portion 85 in which an air passage is formed therein. More may be included.

As described above, the heater housing 81 and the blowing fan are disposed on the lower surface 25 of the tub 20, for example, below the bottom tub 20c. The connection duct portion 85 serves to guide the dry wind discharged from the heater housing 81 to move toward a preset location, that is, the dry wind supply hole 254 formed in the tub 20.

For example, the preset position may be the lower surface 25 of the tub 20, and the dry wind supply hole 254 through which the dry wind airflow F guided to the connection duct portion 85 is introduced is the tub 20. ) can be formed at a corner adjacent to the rear 23 and the left side 26 as the lower surface 25 of ).

As shown in the illustrated embodiment, the duct body 851 of the connection duct portion 85 connects the dry wind supply hole 254 of the tub 20 and the outlet of the heater housing 81 by changing the direction of the dry wind airflow. It can be configured to have a shape that can be used.

Illustratively, the duct body 851 of the connecting duct portion 85 has a lower end 8512 in fluid communication with the outlet of the heater housing 81 and an upper end 8511 extending upward (U-direction) to blow dry air. It may be configured in a cylinder shape connected to the supply hole 254.

The lower part 8512 of the duct body 851 may be configured to be slidingly coupled to the heater housing 81.

Meanwhile, considering the cross-sectional shape of the square outlet of the heater housing 81, the lower end of the duct body 851 may be shaped like a square cylinder, and the upper end of the duct body 851 may be shaped like a cylinder to prevent water leakage. there is.

That is, for the efficiency of fastening between the upper end 8511 of the duct body 851 and the dry air supply hole 254 of the tub 20 and to prevent water leakage, the duct body 851 may be configured in a cylindrical shape.

An airflow guide 83 may be coupled to the upper end 8511 of the duct body 851 to change the direction of the drying wind supplied through the duct body 851 and supply it to the washing space.

The filtering unit 88 may be disposed upstream of the heater 84 based on the flow direction of the dry wind airflow to filter the air to be sucked in by the blower fan and supply it to the heater 84.

In more detail, the filtering unit 88 includes a filter member 883 that filters air to be sucked in by the blowing fan, a filter receiving space (S1) in which the filter member 883 is replaceably disposed, and a fan housing (82). ) may be configured to include a hollow filter housing 881 in which a fan housing receiving space (S2) is disposed.

As shown in FIG. 4, the filter housing 881 includes a first housing 8811 and a second housing 8812 that are arranged in the form of a divided body based on the vertical direction (U-D direction). It may be configured to include. At this time, the first housing 8811 can be the upper housing and the second housing 8812 can be the lower housing.

The filter housing 881 functions to accommodate and support the filter member 883 and the fan housing 82 of the blowing fan.

Accordingly, the first housing 8811 is configured to accommodate and support the filter member 883 and the fan housing 82 at least partially, preferably the upper portion of the filter member 883 and the upper portion of the fan housing 82. It can be divided into a filter receiving part (8811a) and a fan housing receiving part (8811b).

As shown, the filter accommodating part 8811a and the fan housing accommodating part 8811b of the first housing 8811 are open as a whole so that the second housing 8812 can be coupled to the lower side.

The filter accommodating part 8811a may be formed further upstream than the fan housing accommodating part 8811b based on the flow direction of the dry wind airflow, and may be formed on the right side of the fan housing accommodating part 8811b based on the illustrated embodiment. there is.

The filter accommodating portion 8811a may have an external shape that is partially cylindrical so that it can be accommodated in and out when replacing the filter member 883, which is illustratively provided in a cylindrical shape.

Additionally, a filter guide rib having a similar shape to the filter guide rib 8812f of the second housing 8812, which will be described later, may be integrally provided inside the filter accommodating portion 8811a.

A coupling opening 8811c that opens in a circular shape may be formed at the top of the filter receiving portion 8811a, corresponding to the outer shape of the filter member 883, and the filter member 883 passes through the coupling opening 8811c to the lower side. direction and can move up to the filter receiving portion 8812a of the second housing 8812.

The fan housing accommodating part 8811b is located further downstream than the filter accommodating part 8811a based on the flow direction of the dry wind airflow, and based on the illustrated embodiment, the heater housing 81 is located on the right side of the filter accommodating part 8811a. ) and may be formed integrally with the filter receiving portion (8811a).

The fan housing accommodating portion 8811b may have an internal shape corresponding to the upper outer shape of the fan housing 82 so as to entirely cover the upper part of the blowing fan. For example, the upper surface of the fan housing receiving portion 8811b may be provided in a flat shape.

As shown, the upper surface of the first housing 8811 may be provided with an inclined surface 8811b1 connecting the top of the filter accommodating part 8811a and the fan housing accommodating part 8811b.

The second housing 8812 of the filter housing 881 is coupled to the lower part of the first housing 8811 to form a sealed receiving space, and accommodates and supports the filter member 883 and the lower part of the fan housing 82. It serves to perform a function.

Similar to the first housing 8811, the second housing 8812 accommodates the filter accommodating portion 8812a and the fan housing so as to accommodate and support the lower part of the filter member 883 and the lower part of the fan housing 82. It can be divided into parts 8812b.

As shown, the top of the second housing 8812 may be completely open so that it can be coupled to the bottom of the first housing 8811.

Corresponding to the filter accommodating part 8811a of the first housing 8811, the filter accommodating part 8812a of the second housing 8812 provided at the lower part of the filter accommodating part 8811a of the first housing 8811 has a filter. When the member 883 is retracted, a plurality of filter guide ribs may be provided to guide the movement of the filter member 883 and prevent it from leaving its original position.

Additionally, a plurality of filter guide ribs may be arranged radially around the filter member 883 to correspond to the outer shape of the filter member 883 having a cylindrical shape.

A lower intake port 8812c, which opens toward the bottom of the base 90 and introduces external air, may be formed through the bottom of the filter receiving portion 8812a as the center of the plurality of filter guide ribs 8812f.

The lower intake port 8812c may be provided in a circular shape corresponding to the lower opening of the filter member 883, which has a cylindrical shape, and may be provided so that external air can be smoothly introduced into the interior of the filter member 883 through the lower opening. Relative position and size may be determined.

Meanwhile, on the bottom of the second housing 8812, a pair of annular ribs is provided at the lower intake port as an airtight means to prevent unfiltered external air from leaking and being directly introduced into the internal space of the filter housing 881. can be formed around .

The fan housing accommodating part 8812b is located further downstream than the filter accommodating part 8812a based on the flow direction of the dry wind airflow, and based on the illustrated embodiment, the heater housing 81 is located on the right side of the filter accommodating part 8812a. ) may be formed integrally with the filter receiving portion 8812a.

The fan housing accommodating portion 8811b may have an internal shape corresponding to the outer shape of the lower part of the fan housing 82 so as to entirely cover the lower part of the blowing fan.

The bottom surface of the fan housing receiving portion 8811b is spaced apart from the bottom surface of the fan housing 82 at a predetermined interval so that the filtered air can be effectively sucked in, and is preferably flat and parallel to the horizontal direction. It may be composed of cotton.

As a means for supporting the fan housing 82 away from the bottom surface of the fan housing accommodating part 8811b, a plurality of raised surface portions and screws are provided inside the fan housing accommodating part 8812b in a form that protrudes from the bottom surface. A boss may be provided.

The first housing 8811 and the second housing 8812 are arranged in the form of a divided body, and the lower end of the first housing 8811 and the upper end of the second housing 8812 are detachably coupled to each other.

In order to achieve this detachable coupling relationship, a fastening tab 8811d extending toward the second housing 8812 is provided at the bottom of the first housing 8811, and a fastening tab is provided at the top of the second housing 8812. (8811d) may be provided with a hook protrusion (8812d) that is fastened by a hook coupling method.

Meanwhile, the tub connection duct 882 may be detachably coupled and fastened to the coupling opening 8811c of the filter receiving portion 8811a of the first housing 8811.

The filter member 883 may be configured to be replaced through the lower surface 25 of the tub 20.

For this purpose, the filter receiving portion 8811a of the first housing 8811 needs to be connected to the lower surface 25 of the tub 20, and the tub connection duct 882 is connected to the lower surface 25 of the tub 20. 1 It serves to connect the filter receiving portion (8811a) of the housing (8811) to each other.

The tub connection duct 882 may be integrally provided in the filter receiving portion 8811a of the first housing 8811, but as shown, the tub connection duct 882 is provided separately in the first housing 8811. It can be.

Similar to the duct body 851 of the aforementioned connection duct portion 85, the upper end 8821 of the tub connection duct 882 may extend upwardly through the lower surface 25 of the tub 20.

As shown in FIGS. 5 to 7 , a filter replacement hole 253 may be provided on the lower surface 25 of the tub 20 so that the upper end 8821 of the tub connection duct 882 can be inserted.

The center side of the lower surface 25 of the tub 25 may be provided with a sump hole 252 in which the sump 41 is mounted, and the lower surface 25 of the tub 20 allows washing water to effectively enter the sump hole 252. A convergence surface having a gradually descending inclination angle may be formed as it progresses toward the sump hole 252 so that the surfaces can converge.

As shown, the filter replacement hole 253 may be formed on the converging surface at the rear of the sump hole 252.

In order to distinguish it from the dry air supply hole 254, the filter replacement hole 253 may be formed at a corner adjacent to the rear and right side of the lower surface 25 of the tub 20. Furthermore, for convenience of withdrawal and retraction for replacement of the filter member 883, the filter replacement hole 253 may be placed closer to the front of the tub 20 than the dry air supply hole 254, and the water softener communication hole. It can be placed rearward than (255).

The water softener communication hole 255 formed in front of the filter replacement hole 253 has the purpose of, for example, injecting a water softener into a water softener (not shown) provided at the bottom, but also serves the purpose of introducing a water softener (not shown) in the water supply unit, etc. It can be used for replacement and maintenance of other parts.

Meanwhile, the filter replacement hole 253 may be located between the water softener communication hole 255 and the dry air supply hole 254 in the front-back or left-right direction.

That is, the filter replacement hole 253 may be placed in a position away from the virtual extension line connecting the water softener communication hole 255 and the dry air supply hole 254.

Through this, even if a plurality of openings are formed in the lower surface 25 of the tub 20, a decrease in the strength of the tub 20 can be prevented and the torsional rigidity or bending rigidity can be advantageously formed.

In addition, in order to distinguish it from the water softener communication hole 255 formed in front of the filter replacement hole 253, there is a water softener inlet at the top of the tub connection duct 882 that passes through the filter replacement hole 253 and is exposed to the washing space. A sealing cap 884 having a shape or color different from that of 255 may be applied.

As described above, the filter replacement hole 253 is provided on the converging surface provided on the lower surface 25 of the tub 20. Therefore, the upper end and flange of the tub connection duct 882 coupled to the filter replacement hole 253 have a predetermined inclination angle with respect to the vertical direction corresponding to the inclination angle of the converging surface of the tub 20, that is, it is tilted with respect to the vertical direction. It can be formed in a true state.

A first gasket 885 may be further provided between the flange 8823 of the tub connection duct 882 and the lower surface 25 of the tub 20 to prevent loosening of the fastening nut and prevent water leakage.

When the tub connection duct 882 is fixed to the lower surface 25 of the tub 20 through the fastening nut 886, a sealing cap 884 is installed at the upper end of the tub connection duct 882 exposed to the inside of the tub 20. This can be combined. At this time, an airtight ring 887 to prevent water leakage may be placed between the sealing cap 884 and the upper end of the tub connection duct 882.

Meanwhile, an upper intake port 8826 through which external air is introduced may be formed between the upper and lower ends of the tub connection duct 882, at a position below the flange corresponding to the upper side of the filter accommodation space S1.

The upper intake port 8826 may be formed from the inner circumferential surface to the outer circumferential surface of the tub connection duct 882 having a cylindrical shape. Preferably, the upper intake port 8826 may be provided as a plurality of through openings arranged and formed along the circumferential direction of the tub connection duct 882.

The upper intake port 8826 may be formed at a higher position than the upper opening of the filter member 883 based on the state in which the filter member 883 is disposed in the filter receiving space (S1). Therefore, the upper intake port 8826 can be viewed as being formed between the upper surface of the tub 20 and the filter member 883 in the vertical direction.

Therefore, the external air that has passed through the upper intake port 8826 in a direction parallel to the horizontal direction changes the airflow direction after entering the inside of the filter member 883, and filtration can proceed while passing through the outer peripheral surface of the filter member 883. there is.

The intake path of external air and the flow path of the dry wind airflow passing through the filter member 883 will be described later with reference to FIG. 8.

[Air flow path before and after filtration]

Hereinafter, with reference to FIG. 8, the flow path of the outside air before passing through the filter member 883 of the dishwasher 1 according to an embodiment of the present invention and the dry wind airflow filtered through the filter member 883 ( Let us explain the flow path of F).

The filter housing 881 of the dishwasher 1 according to an embodiment of the present invention is formed at a position spaced apart from each other along the vertical direction, and includes a plurality of filter housings open toward the space between the base 90 and the tub 20. It is configured to introduce external air through the intake port.

As described above, the plurality of intake ports include an upper intake port 8826 provided in the tub connection duct 882 as the upper side of the filter accommodating space S1, and a second housing 8812 as the lower side of the filter accommodating space S1. It may include a lower intake port (8812c) provided on the bottom surface.

In this way, the upper intake port 8826 and the lower intake port 8812c are spaced apart from each other and arranged at the highest and lowest positions of the filter housing 881, respectively, based on the space between the tub 20 and the base 90. Therefore, since external air can be introduced through the two intake ports with minimal influence on the mutually inhaled air flow rate, a sufficient air flow rate required for drying the cleaning object can be secured compared to the past, and an increase in drying time can be prevented. can do.

As shown, the upper intake port 8826 is open in a direction substantially parallel to the horizontal direction. Therefore, the external air introduced into the upper intake port 8826 forms an air flow parallel to the horizontal direction.

Meanwhile, the lower intake port 8812c is formed on the bottom surface extending in the horizontal direction. Therefore, the lower intake port 8812c is open toward the base 90 in a direction parallel to the vertical direction, and the external air introduced into the lower intake port 8812c forms an air flow parallel to the vertical direction.

External air introduced through the upper intake port 8826 may enter the upper opening of the filter member 883, which is located immediately below the upper intake port 8826, based on the state in which it is placed in the filter receiving space (S1). there is.

In addition, the external air introduced through the lower intake port 8812c is filter member 883 located immediately above the lower intake port 8812c based on the state in which the filter member 883 is disposed in the filter receiving space S1. Can be entered through the lower opening.

Based on the state in which the filter member 883 is disposed, an airtight means is provided on the upper side of the filter member 883 and the lower side of the filter member 883 to prevent unfiltered air from being introduced into the filter housing 881. It can be provided.

Therefore, external air introduced into the upper intake port 8826 and the lower intake port 8812c can enter the upper and lower openings of the filter member 883, respectively, without leakage.

Meanwhile, based on the state disposed in the filter receiving space (S1), the upper opening of the filter member 883 is open toward the lower surface 25 of the tub 20, and the lower opening of the filter member 883 is open to the base. It is open toward the bottom of (90). Therefore, the airflow direction of the outside air is changed to the downward direction as it passes through the upper opening, and the outside air passing through the lower opening flows in the upward direction.

In this way, the external air introduced into the filter member 883 can pass through the filter material of the filter member 883 and be evenly introduced throughout the vertical and circumferential directions.

Meanwhile, the external air introduced into the inner peripheral surface of the filter member 883 is filtered and discharged while passing through the outer peripheral surface of the filter member 883, and the flow direction is changed immediately after being discharged.

As shown in FIG. 8, the flow direction of the filtered air that has passed through the outer peripheral surface of the filter member 883 may be changed to face the lower surface of the fan housing 82, which is open toward the bottom surface of the filter housing 881. .

The lower surface of the fan housing 82 is disposed between the lower and upper ends of the filter member 883 at a position spaced upward from the bottom surface. Therefore, the air passing through the filter member 883 at a position higher than the lower surface of the fan housing 82 flows downward toward the lower surface of the fan housing 82, and at a position lower than the lower surface of the fan housing 82. The air that has passed through the filter member 883 flows upward toward the lower surface of the fan housing 82.

The filtered air introduced into the fan housing 82 through this flow path is accelerated by the blowing fan and then introduced into the internal space of the housing connector 87 and the heater housing 81, thereby creating a dry wind airflow (F). can be formed.

[Detailed configuration of airflow guide]

Hereinafter, the detailed configuration of the airflow guide 83 of the dishwasher 1 according to an embodiment of the present invention will be described with reference to FIGS. 9 to 27.

First, as shown in FIG. 9, between the lower surface 25 of the bottom tub 20c and the lower rack 51, close to the lower surface 25 of the bottom tub 20c, the duct is supplied through the duct body 851. An airflow guide 83 that changes the flow direction of the drying wind airflow (F) may be disposed.

More specifically, the airflow guide 83 is located near a corner formed between the left side 26 and the rear 23 of the bottom tub 20c or between the right side 27 and the rear 23 of the bottom tub 20c. It can be placed near the edge being formed. Corresponding to the position of the airflow guide 83, a dry air supply hole 253 for transmitting the aforementioned dry wind may be formed on the lower surface 25 of the bottom tub 20c.

9 and below, for example, an airflow guide 83 and a dryer are provided near a corner formed between the left side 26 and the rear 23 of the bottom tub 20c adjacent to the lower surface 25 of the bottom tub 20c. An embodiment in which the wind supply hole 253 is disposed is shown. The present invention is not limited to this, but as shown below for convenience, an airflow guide 83 and a dry air supply hole 253 are provided near the edge formed between the left side 26 and the rear 23 of the bottom tub 20c. ) will be described based on the embodiment in which is arranged.

The vicinity of the edge formed between the left side 26 and the rear 23 of the bottom tub 20c corresponds to a position as far away as possible from the top of the front 22 of the tub 20, which is partially opened during the drying process. do.

Accordingly, the time for which the drying wind sprayed from the airflow guide 83 remains inside the tub 20 can be effectively extended compared to the prior art. Through this, the drying wind can be evenly supplied to the lower rack (51), upper rack (52), and top rack (53) and then discharged through the front upper part of the tub, so that the heat energy of the drying wind can be effectively transmitted to the cleaning object. The drying effect on the cleaning object can be significantly improved compared to the prior art.

In addition, since the airflow guide 83 is disposed at a predetermined distance from the rear 23, lower surface 25, and left side 26 of the bottom tub 20c, the airflow guide 83 and the bottom tub 20c It can effectively prevent food from getting stuck or stuck in between.

Meanwhile, the time for which the drying wind remains inside the tub 20 can be further increased by adjusting the direction in which the drying wind is sprayed from the airflow guide 83.

That is, the discharge port 833 of the airflow guide 83 through which the drying wind is sprayed is formed in a position so that the spraying direction of the drying wind is not directly toward the lower rack 51 and the cleaning objects stored in the lower rack 51. It can be configured.

More specifically, the airflow guide 83 of the dishwasher 1 according to an embodiment of the present invention directs drying air in an upward direction (U-direction) perpendicular to the lower surface 25 of the bottom tub 20c or the lower rack. It may be configured to discharge in a direction other than directly toward (51).

To this end, the discharge port 833 through which dry wind is sprayed may be formed on the right side of the airflow guide 83 to discharge dry wind in a direction substantially parallel to the rear 23 of the bottom tub 20c.

As exemplarily shown in FIGS. 9 and 10, the airflow guide 83 has a width in the front-back direction (F-R direction) in the left-right direction ( It may have an external shape that is longer than the width (Le-Ri direction), and the discharge port 833 may be formed continuously across the right side and rear facing the right side 27 of the bottom tub 20c. That is, the discharge port 833 of the airflow guide 83 may be formed so as not to point directly toward the door, and to have a directionality that does not point in a straight line toward the front 22 of the tub 20 or the door 30.

At this time, the discharge port 833 of the airflow guide 83 may be provided in a slit or rectangular shape where the height in the vertical direction (U-D direction) is smaller than the length in the front-back direction (F-R direction). In addition, the height of the discharge port 833 in the vertical direction (U-D direction) can be kept constant while moving in the front-back direction (F-R direction) so that the drying wind can be sprayed from the lowest possible position.

In addition, as shown, the front edge 833b of the discharge port 833 is formed on the right side of the airflow guide 83, which has a flat plate shape, and the rear edge 833a extends to the back of the airflow guide 83, which has a curved shape. It may be extended.

Therefore, the drying wind sprayed through the discharge port 833 can be discharged at the lowest possible position based on the vertical direction (U-D direction), and the rear 23 of the bottom tub 20c based on the horizontal direction through the slit shape. It may be sprayed in a direction that is approximately parallel to and in a direction that is not directed in a straight line toward the door 30.

In addition, in order to improve the distribution effect of the drying wind sprayed through the discharge port 833, the discharge port 833 is located between the lower rack 51 and the rear 23 of the bottom tub 20c. It may be configured to extend between the separation spaces (S) formed in.

That is, at least a portion of the drying wind sprayed through the slit-shaped discharge port 833 is sprayed toward the lower surface 27 of the bottom tub 20c and the lower rack 51, and the remaining portion of the drying wind is sprayed toward the separation space (S). ) may be configured to be sprayed toward.

To this end, the front edge 833a of the slit-shaped discharge port 833 may be disposed below the lower rack 51, and the rear edge 833b of the discharge port 833 may be disposed in the space S. there is.

In other words, as shown in FIG. 9, the discharge port 833 of the airflow guide 83 has a first part 8331 disposed below the lower rack 51 and a second portion disposed in the space S. It may be divided into two parts 8332, and the reference line dividing the first part 8331 and the second part 8332 may be the rear end 511 of the lower rack 51.

Through this, the drying wind is sprayed in a direction not directly toward the center of the lower rack 51 or in a direction avoiding the lower rack 51, and the drying wind airflow F passing through the first part 8331 is directed to the lower rack 51. The dry wind airflow (F) that rises toward the bottom of (51) and passes through the second part (8332) can rise through the separation space (S).

Therefore, the heat energy of the drying wind is not concentrated in a specific part of the lower rack 51, but can be evenly distributed inside the tub 20.

The relative ratio of the first part 8331 and the second part 8332 may be set differently depending on the required drying wind distribution ratio. That is, when more drying wind needs to be supplied to the lower rack 51, the area ratio of the first part 8331 is increased, and when more drying air needs to be supplied to the separation space S, the area ratio of the first part 8331 is increased. It can be configured to further increase the area ratio of (8332).

However, since the capacity of the lower rack 51 to accommodate the cleaning object is generally formed to be much larger than the upper rack 52 or the top rack 53, the area ratio of the first part 8331 is It may be desirable to set it larger than the area ratio of the second part (8332).

Hereinafter, with reference to FIGS. 11 to 19, the detailed configuration of the airflow guide 83 of the dishwasher 1 according to an embodiment of the present invention will be described.

First, as shown in FIG. 11, the airflow guide 83 of the dishwasher 1 according to an embodiment of the present invention is a lower guide detachably coupled to the duct body 851 of the connection duct portion 85. (831), an upper guide 832 coupled to the upper side of the lower guide 831, and a cap cover 834 disposed on the upper side of the upper guide 832 and coupled to the outer surface of the upper guide 832. It can be configured.

As an example, the airflow guide 83 may be configured to be divided based on the vertical direction (U-D direction), and the lower guide 831 serves to form the lower part of the divided body. The upper part of the split body may be composed of an upper guide 832 and a cap cover 834.

The upper guide 832 is coupled to the upper side of the lower guide 831, which will be described later, and forms a sealed internal flow space in the form of a channel through which the dry wind air current (F) flows inside together with the lower guide 831. do.

As shown in FIGS. 12 and 13, the upper guide 832 may be formed to have a container shape with an empty space formed inside and an overall open lower surface so as to form an internal flow space.

The open lower surface of the upper guide 832 can be completely closed by combining the guide body 8311 of the lower guide 831. Through this, a closed internal flow space can be formed between the upper guide 832 and the lower guide 831.

At this time, corresponding to the shape of the lower guide 831, the outer shape of the upper guide 832 may be formed so that the width in the front-back direction is larger than the width in the left-right direction.

The upper guide 832 has an upper surface 8321 formed approximately parallel to the reference surface 8311a of the lower guide 831, which will be described later, and extends in the downward direction (D-direction) along the circumference of the upper surface 8321. A container shape with an open bottom can be formed through the outer wall surface.

At this time, the top surface 8321 and the outer wall surface can be formed integrally, and are formed to have a generally uniform thickness to maximize the internal flow space, and can preferably be manufactured through plastic injection molding.

The outer wall surface may include a first flat portion 8322c that forms the right side and has a flat plate shape, and a second flat portion 8322d that forms the left side and has a flat plate shape. The first flat portion 8322c and the second flat portion 8322d may be formed in a shape that is symmetrical to each other, and may be a vertical plane or an inclined plane with a gradient in which the distance from each other gradually decreases as it progresses in the upward direction (U-direction). This can be.

Additionally, a first curved portion 8322a may be continuously formed on the front side of the first flat portion 8322c and the second flat portion 8322d, and the first flat portion 8322c and the second flat portion 8322d may be formed continuously. A second curved portion 8322b may be continuously formed on the rear side of .

The first curved portion 8322a forms the front surface of the upper guide 832, and may be illustratively manufactured to have the outer shape of a semi-cylindrical surface convex toward the front.

Similar to the first curved portion 8322a, the second curved portion 8322b forms the rear surface of the upper guide 832 and may be illustratively manufactured to have the outer shape of a semi-cylindrical surface convex toward the rear.

The first curved portion 8322a and the second curved portion 8322b may be arranged to have approximately symmetrical shapes.

The first curved portion 8322a and the second curved portion 8322b may be integrally connected to the top surface 8321, the first flat portion 8322c, and the second flat portion 8322d, respectively, and the top surface 8321 , a continuous surface can be formed with respect to the first flat portion 8322c and the second flat portion 8322d.

Meanwhile, as shown, a first camper surface 8322e in the form of a chamfer may be formed at a corner formed between the top surface 8321 and the outer wall surface. Through the first camper surface 8322e, it is possible to minimize flow loss or noise caused by vortices that may occur at the angled corners of the internal flow space where the dry wind airflow F flows.

The first camper surface 8322e may be a curved surface with a predetermined curvature or an inclined surface with a predetermined slope gradient.

For the same reason as the first camper surface 8322e, the corners created when the top surface 8321 and the first curved portion 8322a meet, and the edges created when the top surface 8321 and the second curved portion 8322b meet, A second camper surface 8322f may be formed in a chamfer shape.

Similar to the first camper surface 8322e, the second camper surface 8322f may be a curved surface with a predetermined curvature or an inclined surface with a predetermined slope gradient.

The lower part 8323 of the upper guide 832 formed around the open lower surface is oriented vertically from the upper surface 8321 to facilitate insertion and coupling into the misassembly prevention groove 8311d of the lower guide 831, which will be described later. It can be formed continuously with the height maintained approximately constant based on the (U-D direction).

Meanwhile, a first notch hole 8324 forming the front edge, rear edge, and top edge of the discharge port 833 may be formed on the lower part 8323 side of the upper guide 832.

As shown, the first notch hole 8324 may be provided in a notch shape by partially cutting the first flat portion 8322c and the second curved portion 8322b of the upper guide 832.

The bottom of the first notch hole 8324 is completely open, and when the upper guide 832 is coupled to the lower guide 831, the reference surface 8311a of the lower guide 831 is aligned with the first notch hole 8324. It can be coupled to the open bottom, and the bottom of the first notch hole 8324 is blocked by the reference surface 8311a.

The top edge of the first notch hole 8324 may extend approximately parallel to the reference surface 8311a of the lower guide 831, and may extend linearly.

The front edge of the first notch hole 8324 is formed in the first flat portion 8322c and may extend linearly along the vertical direction (U-D direction). The rear edge of the first notch hole 8324 is formed in the second curved portion 8322b and may extend linearly along the vertical direction (U-D direction).

The rear corner formed by meeting the top edge and the rear edge and the front corner formed by meeting the top edge and the front edge may each be formed as a curved edge having a predetermined curvature.

On the other hand, the first curved portion 8322a of the upper guide 832 has a first locking hole 8325 in the form of a square through-hole into which the upper guide locking protrusion 8312g of the lower guide 831 is locked. ) may be formed at a location adjacent to the lower end 8323.

As shown in FIG. 12, the outer shape of the upper guide 832 has a generally symmetrical shape in the front-to-back direction (F-R direction), but the first notch hole 8324 and the first locking hole 8325 are in the front-to-back direction. It is formed in an asymmetrical position with respect to (F-R direction). Accordingly, the first notch hole 8324 and the first catching hole 8325 can serve as a means to prevent incorrect assembly of the upper guide 832 to the lower guide 831.

Meanwhile, at least one cap cover locking protrusion 8326 for fastening the cap cover 834, which will be described later, may be integrally formed on the second flat portion 8322d of the upper guide 832.

As will be described later, a cap cover 834 may be coupled to the outer surface of the upper guide 832. At least one cap cover locking protrusion 8326 has a ramp surface having a predetermined inclination angle with respect to the second flat portion 8322d, and is substantially perpendicular to the second flat portion so that coupling is easily performed but separation is not easy. It may be configured to have a step surface formed by .

As shown in FIG. 11, the cap cover 834 is formed adjacent to the lower end 8343 and may be provided with a second locking hole 8345 formed through the inside and outside of the cap cover 834. .

The second locking hole 8345 may be provided in the form of a square through-hole having a width and height into which the cap cover locking protrusion 8326 can be inserted when the upper guide 832 and the cap cover 834 are coupled. Like the cover locking protrusion 8326, it may be formed at a higher position in the vertical direction than the upper guide locking protrusion 8312g.

Through this, the cap cover locking protrusion 8326 and the second locking hole 8345 can be clearly distinguished from the upper guide locking protrusion 8312g through the height difference, so the cap has a symmetrical shape in the front-to-back direction (F-R direction). Misassembly of the cover 834 can be effectively prevented.

Meanwhile, the upper guide 832 of the airflow guide 83 according to an embodiment of the present invention prevents washing water from flowing into the interior of the airflow guide 83 and the connecting duct portion 85 through the discharge port 833. As a first means for minimizing, a blocking rib 8328 may be provided.

As shown in FIGS. 12 and 13, the blocking rib 8328 may include a first rib 8328a extending in the form of a sunshade along the top edge, front edge, and rear edge of the first notch hole 8324. there is.

The first rib 8328a extends continuously along the edge of the first notch hole 8324, and may be formed to protrude in a direction substantially perpendicular to the first flat portion 8322c of the upper guide 832. . Preferably, the first rib 8328a may be formed integrally with the first flat portion 8322c and the second curved portion 8322b of the upper guide 832.

One end of the first rib 8328a may be formed at the rear edge of the first notch hole 8324, and the other end of the first rib 8328a may be formed at the front edge of the first notch hole 8324. . The first rib 8328a may extend in the form of a continuous protruding wall between one end and the other end to serve as an awning that substantially completely surrounds the first notch hole 8324.

However, in order to prevent interference with the first edge wall (8311b) of the lower guide (831), one end and the other end of the first rib (8328a) are directed upward from the lower end (8323) of the upper guide (832). It can be formed at positions spaced apart at a predetermined height in the (U-direction).

The first rib 8328a functions to minimize washing water that falls or scatters from the storage unit after washing the object to be washed, from passing through the first notch hole 8324.

To this end, as shown in FIG. 12, among the first ribs 8328a, the horizontal rib formed at least on the upper edge of the first notch hole 8324 is connected to the first border wall 8311b of the lower guide 831 and the reference surface ( It can be configured to protrude in the horizontal direction to a position beyond 8311a).

That is, the horizontal portion of the first rib 8328a may extend to a position that covers the first border wall 8311b and the reference surface 8311a in the vertical direction (U-D direction), and the installation of the airflow guide 83 When viewed from above in the completed state, the first border wall 8311b and the reference surface 8311a are hidden by the first rib 8328a and are not visible.

Accordingly, the phenomenon of washing water falling in the vertical direction after washing the washing object colliding with the first edge wall 8311b and then scattering and flowing into the inside of the first notch hole 8324 can be minimized.

However, it is inevitable that the washing water scattered during the washing or rinsing process will fall in a direction other than the vertical direction. That is, it cannot be ruled out that the washing water that avoids the first rib 8328a and collides with the first edge wall 8311b and scatters flows into the first notch hole 8324.

In order to prevent this phenomenon, the blocking rib 8328 may further include at least one second rib 8328b extending across the inside of the first notch hole 8324 along the front-back direction (F-R direction). .

12 and 13 illustrate an embodiment in which a pair of second ribs 8328b are arranged to be spaced apart in the vertical direction (U-D direction). The present invention is not limited to this, but for convenience, it will be described below based on an embodiment in which the second ribs 8328b are provided as a pair as shown.

The pair of second ribs 8328b may each extend across the inside of the first notch hole 8324 and may be provided to have the same shape.

At this time, in order to prevent a decrease in the spraying efficiency of the sprayed drying wind, the vertical thickness of each second rib 8328b may be formed to be much smaller than the front-back length.

In addition, in order to minimize the phenomenon of washing water falling in the vertical direction colliding with the first edge wall 8311b and then scattering and flowing into the first notch hole 8324, a pair of The second rib 8328b may be configured to protrude in the horizontal direction to a position beyond the first border wall 8311b and the reference surface 8311a of the lower guide 831. That is, the horizontal position of the left end of the horizontal rib of the first rib 8328a and the horizontal position of the left end of the pair of second ribs 8328b may be the same.

However, in order to completely cover the inside of the first notch hole 8324 based on the front-to-back direction (F-R direction), the rear end of each second rib 8328b is attached to the rear edge of the first notch hole 8324. They are integrally connected, and the front end of the second rib 8328b may be integrally connected to the front edge of the first notch hole 8324.

Through this shape of the second rib (8328b), even if the washing water avoids the first rib (8328a) and collides with the first border wall (8311b) and scatters, the inflow of the washing water is blocked by the second rib (8328b). This can be blocked.

Meanwhile, the pair of second ribs 8328b has a relatively low strength because the thickness is formed to be considerably small compared to the length in the front-back direction, and there is a possibility that it may be damaged by a small external force. In order to prevent such damage, it can be reinforced by a bridge rib (8328c) disposed between the front and rear ends of the second rib (8328b) and connecting the pair of second ribs (8328b) to each other. In the illustrated embodiment, the bridge rib 8328c is shown to extend only between a pair of second ribs 8328b, but in addition, the bridge rib 8328c is configured to extend to the upper edge of the first notch hole 8324. It is also possible to do so.

Meanwhile, the upper guide 832 of the airflow guide 83 according to an embodiment of the present invention prevents washing water from flowing into the interior of the airflow guide 83 and the connecting duct portion 85 through the discharge port 833. As a second means for minimizing, at least one blocking wall 8329 disposed on the internal flow space of the upper guide 832 may be provided.

At least one blocking wall 8329 is configured to allow liquid droplets of washing water flowing through the above-mentioned blocking rib 8328 in a scattered state after collision to move toward the lower part of the upper surface 8321 of the upper guide 832 or to the lower part. It serves to prevent and minimize movement of the guide 831 toward the duct coupling portion 8312.

To this end, as shown in FIGS. 12 and 13, at least one blocking wall 8329 is formed on the upper guide 832 to at least partially block the upper side of the first notch hole 8324 forming the discharge port 833. It may be arranged in the form of a barrier extending downward from the bottom of the top surface 8321.

That is, the vertical position of the lower end of at least one blocking wall 8329 may be between the upper edge of the first notch hole 8324 and the reference surface 8311a of the lower guide 831. Through this, when looking in from the outside of the first notch hole 8324, the duct coupling portion 8312 of the lower guide 831 is entirely obscured by at least one blocking wall 8329 and is not visible from the outside. This makes observation impossible.

Therefore, among the liquid droplets of the washing water flowing into the airflow guide 83 in a scattered state, the droplets bouncing upward collide with at least one blocking wall 8329 and move downward along at least one blocking wall 8329. It may flow down due to gravity.

Liquid droplets whose inflow is blocked in this way and descending through at least one blocking wall 8329 need to be discharged to the outside of the airflow guide 83 again. To this end, the lower edge of at least one blocking wall 8329 may be configured to extend toward the flow guide surface 8313 of the lower guide 831. Additionally, based on the horizontal direction, at least one blocking wall 8329 may be arranged to be included in the flow guide surface area, as will be described later. A description of the relative positional relationship of the lower guide 831 with respect to the flow guide surface 8313 will be described later with reference to FIGS. 18 and 19.

Meanwhile, as in the illustrated embodiment, at least the blocking wall 8329 is illustratively disposed relatively closer to the first notch hole 8324, and the first blocking wall 8329a is separated from the first notch hole 8324. It may be configured to include a second blocking wall (8329b) disposed at a position relatively further apart than the first blocking wall (8329a).

As described above, at least one blocking wall 8329 is disposed in the internal flow space where the dry wind airflow F flows.

Therefore, if the upper side of the first notch hole 8324 is entirely covered by a single blocking wall, the flow resistance of the dry wind airflow (F) increases, and there is a risk that blowing efficiency may decrease.

In order to prevent a decrease in blowing efficiency due to such an increase in flow resistance, the upper side of the first notch hole 8324 is divided into a first blocking wall (8329a) and a second blocking wall (8329b) to complement each other. It can be provided.

That is, the first blocking wall 8329a partially covers the upper side of the first notch hole 8324, and the remaining part not covered by the first blocking wall 8329a is at least partially covered by the second blocking wall 8329b. The first blocking wall (8329a) and the second blocking wall (8329b) may be arranged to obscure.

The first blocking wall 8329a has its upper edge integrally connected to the lower part of the upper surface 8321 of the upper guide 832, and forms a discharge port 833 as it progresses from the first edge 8329a1 to the other edge 8329a2. It may be formed to have a convex curved shape in a direction away from the first notch hole 8324.

Likewise, the upper edge of the second blocking wall 8329b is integrally connected to the lower part of the upper surface 8321 of the upper guide 832, and the discharge port 833 is opened while advancing from the edge 8329b1 to the other edge 8329b2. It may be formed to have a curved shape that is convex in a direction away from the first notch hole 8324 to be formed.

That is, as will be described later, the air introduced into the internal flow space through the upper end 8511 of the connection duct portion 85 is configured to change the flow direction toward the first notch hole 8324 forming the discharge port 833. do. In other words, a rotational speed component is generated in the dry wind airflow (F) during the flow direction change process.

In this way, in the process of changing the flow direction, the first blocking wall (8329a) and the second blocking wall (8329b) can also serve as flow guides to prevent rapid changes in the flow space and to effectively generate rotational speed components. do.

In order to minimize such flow resistance and effectively perform the role of a flow guide, the first blocking wall (8329a) and the second blocking wall (8329b) are formed to have a curved shape with a predetermined curvature, with one edge of each ( The thickness may be maintained uniformly as it progresses from 8329a1 and 8329b1 to each of the other edges 8329a2 and 8329b2.

However, the specific shapes of the first blocking wall 8329a and the second blocking wall may be different from each other.

That is, one edge 8329a1 of the first blocking wall 8329a becomes a fixed end integrally connected to the front edge of the first notch hole 8324, and the other edge 8329a2 of the first blocking wall 8329a May be a free end that is not connected to the outer wall surface of the upper guide 832.

In this way, one edge 8329a1 of the first blocking wall 8329a is integrally connected to the front edge of the first notch hole 8324, and the lower guide 831 is connected through the front edge side of the first notch hole 8324. ) of the duct coupling portion 8312 (8312a) and the upper portion (8511) of the connecting duct portion 85. It is possible to fundamentally block the liquid droplets of washing water from flowing directly into the shortest distance.

Additionally, the vertical position of the lower edge 8329a3 of the first blocking wall 8329a may be configured to vary as it progresses from one edge 8329a1 to the other edge 8329a2 of the first blocking wall 8329a. Illustratively, the bottom edge 8329a3 of the first blocking wall 8329a may be configured to form a step.

More specifically, the bottom edge 8329a3 of the first blocking wall 8329a includes a first edge 8329a31 whose vertical position is maintained approximately constant at the first position, and a first edge 8329a31 whose vertical position is maintained approximately constant at the second position. It may include a maintained second edge 8329a32. At this time, the first position may be lower than the second position to form a step.

As shown, the first edge 8329a31 may be disposed closer to one edge of the first blocking wall 8329a and the front edge of the first notch hole 8324 than the second edge 8329a32. .

That is, the vertical position of the bottom edge of the first blocking wall 8329a formed close to the front edge of the first notch hole 8324 can be maintained lower. Through this, the upper end (8312a) of the duct coupling portion (8312) and the connecting duct portion (85) of the lower guide (831) into which the dry wind airflow (F) is introduced through the front edge side of the first notch hole (8324). Liquid droplets of washing water can be additionally prevented from flowing directly into the upper end (8511) in the shortest possible distance.

As will be described later, the first position of the first edge 8329a31 and the second position of the second edge 8329a32 are lower than the vertical position of the upper end of the dividing wall 8314 provided in the lower guide 831. It can be. That is, the lower edge 8329a3 of the first blocking wall 8329a may be configured to extend to a lower position than the vertical position of the upper end of the dividing wall 8314.

Meanwhile, the second blocking wall 8329b may be separated from the first blocking wall 8329a and may be placed between the first blocking wall 8329a and the second flat portion 8322d.

As shown, one edge 8329b1 and the other edge 8329b2 of the second blocking wall 8329b may each be free ends that are not connected to the outer wall surface of the upper guide 832.

However, as described above, the other edge 8329b2 of the second blocking wall 8329b is closer to the rear edge of the first notch hole 8324 in the front-back direction than the other edge 8329a2 of the first blocking wall 8329a. They can be placed closer together.

In addition, the vertical position of the lower edge 8329b3 of the second blocking wall 8329b is approximately constant as it progresses from the first edge 8329b1 to the other edge 8329b2, and the second edge of the first blocking wall 8329a (8329a) It can be maintained higher than 8329a32).

However, similar to the first blocking wall 8329a, the vertical position of the lower edge 8329b3 of the second blocking wall 8329b is generally the vertical position of the upper end of the dividing wall 8314 provided on the lower guide 831. It may be in a lower position.

Meanwhile, the cap cover 834 disposed on the upper side of the upper guide 832 is coupled to the outer surface of the upper guide 832 and serves to protect the upper guide 832.

The upper guide 832 is disposed at a lower position than the storage portion where the cleaning object is accommodated, and the upper surface 8321 and the outer wall surface are mostly exposed to the washing space 21 of the tub 20. However, as described above, the upper guide 832 is made of a plastic material that may be somewhat lacking in strength.

Therefore, there is a high possibility that the upper guide 832 will be directly damaged by a collision with a cleaning object that may fall from the storage unit during the washing or rinsing process or may fall while the user is withdrawing the storage unit.

The cap cover 834 is coupled to the upper outer surface of the upper guide 832 and serves to prevent the upper guide 832 from being damaged by collision with the cleaning object.

To this end, the cap cover 834 has a higher fracture strength than the upper guide 832 and may be formed of a material having corrosion resistance, and may preferably be formed of a metal plate such as stainless steel.

The cap cover 834 may have a shape corresponding to the shape of the outer surface of the upper guide 832 so that it can be coupled to the outer surface of the upper guide 832.

Therefore, similar to the upper guide 832, the cap cover 834 has an empty space formed inside and has a container shape with the lower surface entirely open.

The upper guide 832 can be inserted and coupled through the open lower surface of the cap cover 834.

Corresponding to the shape of the upper guide 832, the outer shape of the cap cover 834 may be formed so that the width in the front-to-back direction is larger than the width in the left-right direction.

In more detail, the cap cover 834 has an upper surface 8341 formed parallel to the upper surface 8321 of the upper guide 832 and extends in the downward direction (D-direction) along the circumference of the upper surface 8321. It may include an exterior wall surface.

Similar to the upper guide 832, the outer wall surface of the cap cover 834 includes a first flat portion 8342c that forms the right side and has a flat plate shape, and a second flat portion that forms the left side and has a flat plate shape ( 8342d) may be included.

The first flat portion 8342c and the second flat portion 8342d may be formed in a shape that is symmetrical to each other, and may be a vertical plane or an inclined plane with a gradient in which the distance from each other gradually decreases as it progresses in the upward direction (U-direction). It can be.

Additionally, a first curved portion 8342a may be formed on the front side of the first flat portion 8342c and the second flat portion 8342d, and on the rear side of the first flat portion 8342c and the second flat portion 8342d. A second curved portion 8342b may be continuously formed on the side.

The first curved portion 8342a forms the front of the cap cover 834 and has the outer shape of a semi-cylindrical surface convex toward the front corresponding to the shape of the first curved portion 8322a of the upper guide 832.

The second curved portion 8342b forms the rear surface of the cap cover 834 and has the outer shape of a semi-cylindrical surface convex toward the front corresponding to the shape of the second curved portion 8322b of the upper guide 832.

The first curved portion 8342a and the second curved portion 8342b may be formed integrally with the top surface 8341, the first flat portion 8342c, and the second flat portion 8342d, respectively, and the top surface 8341 ), a continuous surface can be formed with respect to the first flat portion 8342c and the second flat portion 8342d.

In addition, a chamfered camper surface 8342e may be formed at a corner formed between the upper surface 8341 and the outer wall surface corresponding to the upper guide 832.

However, unlike the upper guide 832, a configuration corresponding to the second camper surface 8322f of the upper guide 832 is not provided.

The lower end 8343 of the outer wall surface of the cap cover 834 may extend to the lower end 8323 of the outer wall surface of the upper guide 832 so as to cover the entire outer wall surface of the upper guide 832. Therefore, when coupled to the lower guide 831, the lower part 8343 of the cap cover 834 and the lower part 8323 of the upper guide 832 can be inserted into the incorrect assembly prevention groove 8311d of the lower guide 831. there is.

Meanwhile, a second notch hole 8344 having a shape corresponding to the first notch hole 8324 of the upper guide 832 may be formed in the lower part 8343 of the cap cover 834.

Like the first notch hole 8324, the second notch hole 8344 may be provided in a notch shape by partially cutting the first flat portion 8342c and the second curved portion 8342b of the cap cover 834. there is.

Since the specific shape of the second notch hole 8344 may be the same as that of the first notch hole 8324, description of overlapping content will be omitted.

However, a locking protrusion 8344a that protrudes into the inside of the second notch hole 8344 may be provided at the bottom of the front edge of the second notch hole 8344.

The locking protrusion 8344a is a part that is engaged with the other end of the above-described first rib 8328a, and the right portion of the cap cover 834 can be coupled to the upper guide 832 through the locking protrusion 8344a. .

Meanwhile, the second flat portion 8342d of the cap cover 834 has a second locking hole 8345 in the form of a square through-hole into which the cap cover locking protrusion 8326 of the upper guide 832 is locked. It may be formed at a location adjacent to the lower end 8323 of 832.

When the cap cover locking protrusion 8326 is engaged with the second locking hole 8345, the left portion of the cap cover 834 can be coupled to the upper guide 832.

That is, the cap cover 834 may be configured to be fastened to the upper guide 832 at least at two locations through the locking protrusion 8344a and the cap cover locking protrusion 8326.

Meanwhile, as shown in FIGS. 14 to 16, the lower guide 831 may include a guide body 8311 that has an approximately plate shape.

The guide body 8311 may have an external shape whose width in the front-back direction (F-R direction) is larger than the width in the left-right direction (Le-Ri direction) based on the state in which it is installed in the connection duct portion 85.

At this time, among the outer edges that form the outer shape of the guide body 8311, the left and right edges are straight, the front edge is in an arc shape that is convex toward the front, and the rear edge is in an arc shape that is convex toward the rear. This can be.

The left and right edges of the guide body 8311 may be formed to be substantially parallel to each other and symmetrical, and the front and rear edges of the guide body 8311 may be formed to be symmetrical to each other.

A reference surface 8311a that functions as the lower edge of the above-described discharge port 833 may be formed on the right edge side of the guide body 8311. As shown, the reference surface 8311a may be provided in the form of a flat surface and may extend from the right edge to the bottom of the flow guide surface 8313, which will be described later.

Meanwhile, the left edge, right edge, front edge, and rear edge of the guide body 8311 have a first border wall 8311b that extends at least partially from the reference surface 8311a upward (U-direction) to a predetermined height. can be formed.

As shown, the first edge wall 8311b may be formed continuously along the outer edge of the guide body 8311. However, as shown in FIG. 14, the first border wall 8311b may not be formed at least in the area of the discharge port 833 so as not to impede the spraying of drying air.

Meanwhile, the inside of the first border wall 8311b is formed to be depressed in the downward direction (D-direction) lower in the vertical direction (U-D direction) than the reference surface 8311a, and prevents incorrect assembly of the upper guide 832. An incorrect assembly prevention groove 8311d that functions as a part may be formed. At this time, the height at which the misassembly prevention groove 8311d is depressed from the reference surface 8311a can be maintained approximately constant as it progresses along the first edge wall 8311b.

The lower part 8323 of the upper guide 832, which will be described later, may be inserted and coupled to the incorrect assembly prevention groove 8311d. Therefore, the incorrect assembly prevention groove 8311d can be formed to have a shape and size corresponding to the shape and size of the lower end 8323 of the upper guide 832. As described above, the shape of the lower part 8323 of the upper guide 832 is continuous except for the area where the first notch hole 8324 forming the discharge port 833 is formed, that is, the area where the reference surface 8311a is formed. Since it is formed, correspondingly, the misassembly prevention groove 8311d can be formed continuously along the first border wall 8311b.

At this time, the shape of the lower part 8323 of the upper guide 832 and the shape of the misassembly prevention groove 8311d may be configured to have an asymmetric shape based on the front-to-back direction (F-R direction). Therefore, the lower part 8323 of the upper guide 832 can be configured to prevent coupling and fastening in a direction other than the direction preset in the misassembly prevention groove 8311d, and through this, the upper guide 832 and the lower guide (831) Misassembly between can be effectively prevented.

Meanwhile, a second border wall 8311c extending from the reference surface 8311a downward (D-direction) with a predetermined height may be formed on the front edge of the guide body 8311.

As shown, the second border wall 8311c may be continuously formed to have a cylindrical shape while proceeding along the arc-shaped front edge of the guide body 8311, and the lower end of the second border wall 8311c will be described later. It may extend to a position beyond the lower end (8312b) of the duct coupling portion (8312).

That is, the second border wall 8311c may be formed to at least partially surround the outer surface of the duct coupling portion 8312, which will be described later. At this time, the second border wall 8311c is formed in a separate and spaced state from the duct coupling part 8312, and a predetermined space is formed between the second border wall 8311c and the duct coupling part 8312. You can. As will be described later, the upper end 8522 of the fastening nut 852 may be at least partially inserted into the space.

On the second border wall 8311c, a loosening prevention portion 8311e is provided to maintain the lower guide 831 in a fixed position through interaction with the fastening nut 852 and to prevent the lower guide 831 from being separated from the fixed position. may be provided.

As will be described later, the lower guide 831 is detachably coupled to the duct body 851 of the connecting duct portion 85 through a two-step coupling operation without a separate coupling member. Preferably, the two-step combination operation may include a vertical movement operation in the vertical direction and a rotational movement operation in the circumferential direction.

The loosening prevention portion 8311e is configured to cause the lower guide 831 to rotate relative to the direction opposite to the rotational movement of the two-step engaging operation after the two-step engaging operation including the vertical movement operation and the rotational moving operation is completed, that is, the lower guide It serves to prevent (831) from deviating from its fixed position.

The loosening prevention portion 8311e may be formed integrally with the second border wall 8311c as shown by way of example, and is elastic hook-type so that the lower guide 831 moves in the opposite direction to the rotational movement of the two-step coupling operation. It can be configured to block relative rotation.

Meanwhile, as described above, the lower guide 831 is configured to be directly coupled to the duct body 851 of the connecting duct portion 85 through a pipe coupling method.

For this purpose, the lower guide 831 may include a cylindrical duct coupling portion 8312 into which the upper end 8511 of the cylindrical duct body 851 is inserted and detachably coupled.

Corresponding to the shape of the duct body 851, the duct coupling portion 8312 may be provided in a cylindrical shape with the central axis extending parallel to the vertical direction (U-D direction). The inner diameter of the lower end (8312b) of the duct coupling portion (8312) is larger than or equal to the outer diameter of the upper end (8511) of the duct body (851) so that the upper end (8511) of the duct body (851) can be inserted into and pass through. can be formed.

The duct coupling portion 8312 may be formed integrally with the guide body 8311, and may preferably be disposed close to the arc-shaped rear edge of the guide body 8311. That is, the duct coupling portion 8312 may be arranged to be biased toward the rear of the guide body 8311 based on the front-to-back direction (F-R direction).

The upper end (8312a) of the cylindrical duct coupling portion 8312 through which dry wind is discharged may be formed at a position protruding upwardly (U-direction) from the guide body 8311. Preferably, the upper end (8312a) of the duct coupling portion (8312) protrudes and is exposed to the internal flow space formed between the guide body (8311) and the upper guide (832) of the lower guide (831).

At this time, in a state where the coupling of the upper end 8511 of the connecting duct part 85 is completed, the position of the upper end 8312a of the duct coupling part 8312 is higher and lower than the position of the upper end 8511 of the connecting duct part 85. It can be formed in a lower position based on (U-D direction).

That is, as shown in FIG. 17, the upper end 8511 of the connecting duct portion 85 may protrude upward from the upper end 8312a of the duct coupling portion 8312. In this way, the upper end 8511 of the connecting duct part 85 is maintained higher than the upper end 8312a of the duct coupling part 8312, so that the liquid droplets of the washing water flowing in through the discharge port 833 are in the connecting duct part 85. The phenomenon of moving upward due to capillary action through the gap between the outer circumferential surface and the inner circumferential surface of the duct coupling portion 8312 can be fundamentally blocked.

Meanwhile, the inner peripheral surface 8312c of the duct coupling portion 8312 includes a first guide groove 8312d extending linearly in the vertical direction (U-D direction), and a second guide groove 8312e extending in an arc shape along the circumferential direction. ) can be formed.

As shown, the upper end of the first guide groove (8312d) and one end of the second guide groove (8312e) are integrally connected.

As described above, the lower guide 831 is coupled to the duct body 851 of the connecting duct portion 85 through a two-step coupling operation including a vertical movement operation in the vertical direction and a rotational movement operation in the circumferential direction.

The first guide groove 8312d, which extends in a straight line along the vertical direction (U-D direction), serves to guide the vertical movement of the lower guide 831 in the vertical direction, and the second guide groove 8312d extends in an arc shape along the circumferential direction. The guide groove 8312e serves to guide the circumferential rotational movement of the lower guide 831.

The outer peripheral surface of the duct body 851, which is inserted and coupled to the duct coupling portion 8312 of the lower guide 831, is formed to protrude toward the inner peripheral surface of the connecting duct portion 85, and is formed as a first guide of the connecting duct portion 85. The guide protrusion 8516 inserted into the groove 8312d and the second guide groove 8312e may be provided integrally.

Therefore, as will be described later, when the lower guide 831 and the duct body 851 are coupled, the guide protrusion 8516 may first be inserted into the first guide groove 8312d.

Therefore, with the guide protrusion 8516 of the duct main body 851 inserted into the first guide groove 8312d, the lower guide 831 can move vertically in the downward direction (D-direction).

When the vertical movement operation in the vertical direction is initiated during the two-step coupling operation, the first guide groove 8312d moves downward (D-direction) along the guide protrusion 8516 in a stationary state. When the guide protrusion 8516 reaches the top of the first guide groove 8312d, the lower guide 831 can no longer move in the downward direction (D-direction) due to the action of the guide protrusion 8516. .

At this time, since the guide protrusion 8516 has reached one end of the second guide groove 8312e, the lower guide 831 cannot move in the downward direction (D-direction), but during the two-step coupling operation. Circumferential rotational movement operation becomes possible.

When the lower guide 831 is rotated for a circumferential rotation operation during the two-step coupling operation, the second guide groove 8312e moves along the guide protrusion 8516 in a stationary state. When the guide protrusion 8516 reaches the other end of the second guide groove 8312e, the lower guide 831 is no longer able to rotate in the circumferential direction due to the action of the guide protrusion 8516.

In this way, when rotation is no longer possible, the coupling between the lower guide 831 and the duct body 851 is completed, the lower guide 831 can be placed in a fixed position, and a separate coupling member or The coupling between the lower guide 831 and the duct main body 851 can be achieved without providing a fastening member.

Meanwhile, as shown in FIGS. 14 and 15, a blocking feeling for movement of the guide protrusion 8516 is formed on the other end side of the second guide groove 8312e, and the guide protrusion 8516 is connected to the second guide groove 8312e. A stopper protrusion (8312f) to prevent relative rotation in the opposite direction of the lower guide (831) after reaching the other end may be formed integrally with the inner peripheral surface (8312c) of the duct coupling portion (8312).

Therefore, unless an external force exceeding a certain level is applied, the guide protrusion 8516 can be prevented from being separated from the other end of the second guide groove 8312e through the stopper protrusion 8312f.

However, when the coupling and positioning of the lower guide 831 is completed with the guide protrusion 8516 inserted into the second guide groove 8312e, the second guide groove 8312e and the guide protrusion 8516 Due to the jamming between the airflow guides (83), movement by its own weight becomes impossible.

However, if there is a strong external force, such as a collision with a cleaning object that falls during the washing stroke or bowing stroke, there is a risk that the jam between the second guide groove (8312e) and the guide projection (8516) will be easily released.

In addition, even if a strong external force is not applied, the lower guide 831 and the airflow guide are damaged due to the clearance between the duct coupling portion 8312 of the lower guide 831 and the duct body 851 of the connecting duct portion 85 due to the manufacturing tolerance. There is a high possibility that the rattling of (83) will occur.

Such shaking occurs because the relative displacement or relative movement of the lower guide 831 with respect to the connection duct portion 85 is generated due to the occurrence of clearance.

The present invention is a means for minimizing the clearance between the lower guide 831 and the connection duct portion 85, and in particular, as a means for limiting the downward relative movement with respect to the connection duct portion 85, at least one protruding rib. may include.

Referring to FIG. 16, at least one protruding rib has a male thread portion 8514 provided on the outer peripheral surface of the duct body 851 of the connecting duct portion 85 in a downward direction from the lower end 8312b of the duct coupling portion 8312. It may be provided to protrude toward.

That is, the air flow guide 83 of the dishwasher according to an embodiment of the present invention adjusts the amount of clearance generated through the male thread portion 8514 of the duct main body 851 disposed on the lower side of the duct coupling portion 8312. It may be configured to limit relative movement in the downward direction.

Therefore, when the downward relative movement of the airflow guide 83, that is, the downward relative movement of the lower guide 831 occurs, the lower surface of at least one protruding rib comes into contact with one side of the male thread portion 8514. The relative movement of the lower guide 831 may be restricted.

16 , at least one protruding rib is exemplarily shown as a first protruding rib 8312h1 disposed at equal intervals around a circular opening formed at the lower end 8312b of the duct coupling portion 8312 of the lower guide 831. , a second protruding rib (8312h2), and a third protruding rib (8312h3) are shown. The present invention is not limited to this, but will be described below based on a configuration including the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3.

As shown, the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3, respectively disposed at equal intervals along the circumferential direction, may be configured to have the same cross-sectional shape. For example, the cross section in the direction perpendicular to the protrusion direction may be approximately longitudinal.

That is, these protruding ribs 8312h1, 8312h2, and 8312h3 may protrude from the lower end 8312b of the duct coupling portion 8312 in the shape of a rectangular pillar with the same circumferential width and the same radial width.

However, the height at which the first protruding rib (8312h1), the second protruding rib (8312h2), and the third protruding rib (8312h3) protrude downward from the lower end (8312b) of the duct coupling portion (8312) may be set differently. there is.

That is, the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 protrude toward the male screw portion 8514 extending in a spiral shape at different positions. Therefore, the maximum protrusion height of the first protrusion rib 8312h1, the second protrusion rib 8312h2, and the third protrusion rib 8312h3 is such that the gap with respect to the male thread portion 8514 can be maintained constant at each position. It can be formed differently.

For example, the first protruding rib 8312h1 may protrude to the smallest first height, the second protruding rib 8312h2 may protrude to a second height greater than the first height, and the third protruding rib (8312h2) may protrude to a second height greater than the first height. 8312h3) may protrude to a third height that is greater than the second height.

As will be described later, these first protruding ribs (8312h1), second protruding ribs (8312h2), and third protruding ribs (8312h3) are arranged in the corresponding clockwise order when viewed from the upper side of the airflow guide 83. It can be placed as .

Meanwhile, the lower surfaces of the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 are inclined surfaces corresponding to the shape of one side of the spirally extending male thread portion 8514. It can be provided.

Detailed configurations of the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 will be described later with reference to FIGS. 23 and 24.

Meanwhile, at least one upper guide stopping protrusion 8312g for mutual fastening between the upper guide 832 and the lower guide 831, which will be described later, may be integrally formed on the outer peripheral surface of the duct coupling portion 8312.

At least one upper guide locking protrusion (8312g) is located on the outer peripheral surface of the duct coupling portion 8312 so that the upper guide 832 can be easily coupled through downward movement but cannot be easily separated through upward movement. It may be configured to have a ramp surface having a predetermined inclination angle and a step surface formed approximately perpendicular to the outer peripheral surface of the duct coupling portion 8312.

Meanwhile, a flow guide surface 8313 may be formed on the front side of the duct coupling portion 8312 to guide the dry wind airflow (F) passing through the upper end (8312a) of the duct coupling portion 8312 toward the discharge port 833. there is.

As shown in FIG. 14, a curved or inclined surface may be continuously formed between the top and bottom of the flow guide surface 8313 to minimize the flow loss of the dry wind airflow (F) and minimize the amount of flow noise generated.

More specifically, the flow guide surface 8313 may be a concave surface surrounded by the rear of the duct coupling portion 8312 and the boundary wall 8313d.

That is, the flow guide surface 8313 is, as described above, the droplets of washing water that are scattered and introduced after colliding with the first edge wall 8311b collide with the flow guide surface 8313 and are re-scattered, and then the duct coupling part ( 8312) and may be provided as concave as possible to prevent movement toward the connection duct portion 85.

In other words, the shape of the channel guide surface 8313 can be determined to keep the gap between the channel guide surface 8313 and the top surface 8321 of the upper guide 832 as large as possible to prevent re-dispersed wash water droplets from bouncing. .

Exemplarily, the flow guide surface 8313 includes a first inclined surface 8313a extending from the reference surface 8311a in a direction crossing the duct coupling portion 8312, and an extension width much smaller than the first inclined surface 8313a. It may be configured to include a second inclined surface 8313c having a and a curved portion 8313b disposed between the first inclined surface 8313a and the second inclined surface 8313c.

The first inclined surface corresponds to a portion that occupies most of the area of the flow guide surface 8313. Additionally, the first inclined surface 8313a is disposed immediately following the reference surface 8311a. Therefore, the first inclined surface 8313a is provided as a flat surface whose elevation angle is kept to a minimum to minimize re-dispersion of the washing water. For example, the elevation angle of the first inclined surface 8313a may be approximately 10 degrees with respect to the reference surface.

Following the first inclined surface 8313a, a curved portion 8313b and a second inclined surface 8313c may be disposed to prevent a sudden change in the internal flow path along which the dry wind airflow F flows.

As shown, the second inclined surface 8313c may have a flat cross-section similar to the first inclined surface 8313a, but the elevation angle may be significantly larger than that of the first inclined surface 8313a.

For example, the elevation angle of the second inclined surface 8313c may be approximately 80 degrees with respect to the reference surface 8311a.

Meanwhile, the lower guide 831 of the airflow guide 83 according to an embodiment of the present invention prevents washing water from flowing into the interior of the airflow guide 83 and the connecting duct portion 85 through the discharge port 833. As a third means for minimizing the damage, a dividing wall 8314 may be formed to protrude upward from the upper end 8312a of the duct coupling portion 8312.

The dividing wall 8314 serves to ultimately block the liquid droplets of the washing water that passed through the blocking rib 8328 and the blocking wall 8329 in a scattering state after collision from entering the duct joint 8312. .

For this purpose, as shown in FIGS. 14, 15, and 17, the dividing wall 8314 protrudes upward from the top 8312a of the duct coupling portion 8312, and includes an area where the duct coupling portion 8312 is formed and It divides the area where the flow guide surface 8313 is formed and may extend in the form of a barrier blocking the top of the duct coupling portion 8312.

That is, the dividing wall 8314 is disposed between the duct joint area and the flow guide area, and may be a boundary wall that divides the duct joint area and the flow guide area.

As shown, the thickness of the dividing wall 8314 may be maintained constant as it progresses from the right end to the left end.

At this time, the right end of the dividing wall 8314 becomes a free end, and the left end extends to the boundary wall 8313d and can be integrally connected to the boundary wall 8313d.

In addition, in order to minimize the flow resistance of the dry wind airflow (F) moving toward the flow guide surface (8313) beyond the dividing wall (8314), the vertical position of the top of the dividing wall (8314) is from the right end to the left end. It can remain roughly constant as it progresses.

However, the vertical position of the top of the dividing wall 8314 does not impede the flow of the dry wind air stream (F) and prevents the flow resistance of the dry wind air stream (F) from rapidly increasing, but can effectively block flying droplets. Thus, the position may be lower than the top 8511 of the duct body 851, but higher than the lower edge of the blocking wall 8329 of the upper guide 832.

That is, the vertical position of the top of the dividing wall 8314 is higher than the lower edge 8329b3 of the second blocking wall 8329b, which is the highest position among the lower edges of the blocking wall 8329 of the upper guide 832. can be formed.

Hereinafter, with reference to FIGS. 18 and 19, a comprehensive description will be given of means for preventing inflow of washing water provided in the airflow guide 83 of the dishwasher 1 according to an embodiment of the present invention.

As described above, the discharge port 833 of the airflow guide 83 that sprays drying air into the washing space 21 of the tub 20 is maintained in an open state inside the washing space 21.

In addition, since the drying air supply unit 80 is not in operation during the washing or rinsing process, there is a high possibility that the washing water will scatter in the form of droplets through the discharge port 833 and flow into the internal flow space of the airflow guide 83. It cannot be ruled out that the droplets of the incoming washing water re-condense inside the airflow guide 83 and then pass through the duct joint 8312 and flow into the dry air supply unit 80.

In order to prevent such an inflow of washing water, the airflow guide 83 according to an embodiment of the present invention is equipped with the following means for preventing inflow of washing water.

First, a first rib 8328a extending in the form of a sunshade is provided on the top edge, front edge, and rear edge of the first notch hole 8324, and inside the first notch hole 8324 in the front-back direction (F-R direction) At least one second rib 8328b extending across the first notch hole 8324 may be provided.

Through this, the inflow of liquid droplets of washing water directly passing through the discharge port 833 or the first notch hole 8324 can be primarily blocked.

In addition, inside the first notch hole 8324, there is a downward direction from the bottom of the top surface 8321 of the upper guide 832 so as to at least partially block the discharge port 833 or the upper side of the first notch hole 8324. An extending first blocking wall 8329a and a second blocking wall 8329b may be provided.

Among the liquid droplets of the washing water that pass through the first notch hole (8324) and flow into the interior of the airflow guide (83) in a scattered state, the droplets that bounce upward are the first blocking wall (8329a) and the second blocking wall (8329b). ) and moves downward along the first blocking wall (8329a) and the second blocking wall (8329b).

As shown, the first blocking wall 8329a and the second blocking wall 8329b are arranged to be included in the flow guide area. Accordingly, the washing water droplets blocked through the first blocking wall 8329a and the second blocking wall 8329b may flow down by gravity toward the flow guide surface 8313.

Meanwhile, the droplets of washing water that are not blocked by the first blocking wall (8329a) and the second blocking wall (8329b) ultimately form a dividing wall 8314 that protrudes upward from the upper end (8312a) of the duct coupling portion (8312). ), movement toward the duct coupling portion 8312 may be blocked.

As described above, the vertical position of the top of the dividing wall 8314 is further than the vertical positions of the lower edge 8329a3 of the first blocking wall 8329a and the lower edge 8329b3 of the second blocking wall 8329b. It is formed high.

Accordingly, most of the washing water droplets introduced into the airflow guide 83 collide with the first blocking wall 8329a and the second blocking wall 8329b and may be blocked from moving to the duct coupling portion 8312. 1 Droplets of washing water that avoid the blocking wall (8329a) and the second blocking wall (8329b) and collide with the flow guide surface (8313) and scatter toward the duct joint (8312) do not jump higher than the top of the dividing wall (8314). It fails and crashes into the dividing wall (8314).

Similar to the first blocking wall 8329a and the second blocking wall 8329b, the wash water droplets that are blocked by colliding with the dividing wall 8314 cannot move beyond the top of the dividing wall 8314 toward the duct joint and are divided. It flows downward along the wall 8314 toward the flow guide surface 8313 by gravity.

In this way, the washing water droplets blocked by the first blocking wall (8329a) and the second blocking wall (8329b) and the washing water droplets blocked by the dividing wall (8314) move to the flow guide surface (8313), and naturally the discharge port ( It can be discharged to the bottom tub (20c) through 833).

In addition, the upper end 8511 of the duct main body 851 protrudes upward from the upper end 8312a of the duct coupling portion 8312 of the lower guide 831, and is more protruding than the dividing wall 8314 of the lower guide 831. It is configured to protrude to a high position.

Therefore, even if wash water droplets are generated beyond the top of the dividing wall 8314, they will not reach the top 8511 of the duct body 851, which has a higher position in the vertical direction than the top of the dividing wall 8314. The possibility becomes very high.

Furthermore, during the washing or rinsing process, a situation may occur in which washing water may accumulate on the lower surface 25 of the tub 20 at a level above a certain level.

When the level of the washing water increases in this way, the washing water passes through the discharge hole 833 of the airflow guide 83 and flows into the interior, creating a gap between the inner peripheral surface 8312c of the duct coupling portion 8312 and the outer peripheral surface of the duct main body 851. A situation where water may infiltrate may occur.

In other words, there is a possibility that the airflow guide 83 itself may be submerged in washing water.

However, even if a situation where the air flow guide 83 is submerged like this occurs, in a state where the water level of the washing water is lower than the top of the dividing wall 8314, the washing water flowing into the inside of the air flow guide 83 flows into the flow guide surface 8313. It can be discharged to the outside of the airflow guide 83 again through the discharge port 833.

In addition, even if the level of the washing water is formed to be higher than the upper end of the dividing wall 8314, the height of the dividing wall 8314 is maintained lower than the height of the upper end 8511 of the duct body 851, as described above. Therefore, the washing water cannot reach the top 8511 of the duct main body 851, and the washing water that reaches the top 8312a of the duct joint 8312 flows from the top 8312a of the washing duct joint 8312 to the duct. It can be discharged back to the lower surface 25 of the tub 20 through the gap between the inner peripheral surface 8312c of the coupling portion 8312 and the outer peripheral surface of the duct body 851.

Through setting the height of the dividing wall 8314, the height of the top 8312a of the duct joint 8312, and the height of the top 8511 of the duct body 851, the inside of the airflow guide 83 Even if the washing water scatters and flows in or the airflow guide 83 is submerged by the washing water, the washing water flows beyond the top 8511 of the duct body 851 and flows into the heater housing 81 and the heater 84. can be effectively prevented.

In addition, the airflow guide 83 of the dishwasher 1 according to an embodiment of the present invention includes a blocking rib 8328 of the upper guide 832, a blocking wall 8329, and a dividing wall 8314 of the lower guide 831. ) and the position of the top 8511 of the duct body 851, the washing water droplets flowing in through the first notch hole 8324 and the discharge port 833 move toward the duct joint 8312 and the duct body 851. It is configured to block and minimize the flow of dry wind airflow (F) supplied through the upper end (8511) of the duct body (851) of the connecting duct portion (85).

More specifically, as shown in FIG. 19, the height of the upper end of the dividing wall 8314 is maintained lower than the upper end 8511 of the duct main body 851 through which the dry wind airflow F is introduced, so that the duct main body 851 The flow resistance exerted by the dividing wall 8314 against the dry wind airflow F passing through the upper end 8511 can be minimized.

In addition, the dry wind airflow F passing through the upper side of the dividing wall 8314 has its flow path partially blocked by the first blocking wall 8329a and the second blocking wall 8329b. The lower edge 8329a3 of the wall 8329a and the lower edge 8329b3 of the second blocking wall 8329b are maintained at a predetermined distance upward from the flow guide surface 8313.

Therefore, the dry wind airflow (F) is the space between the lower edge (8329a3) of the first blocking wall (8329a) and the flow guide surface (8313), and the lower edge (8329b3) of the second blocking wall (8329b) and the flow guide surface. (8313) It is possible to flow effectively through the space in between.

In addition, the other edge 8329a2 of the first blocking wall 8329a and the other edge 8329b2 of the second blocking wall 8329b are separated from the outer wall surface of the upper guide 832.

Therefore, the dry wind airflow (F) is the space between the other edge 8329a2 of the first blocking wall 8329a and the outer wall surface of the upper guide 832, and the other edge 8329b2 of the second blocking wall 8329b and the upper It is possible to effectively flow through the space between the outer wall surfaces of the guide 832.

Through this configuration of the first blocking wall (8329a) and the second blocking wall (8329b), the increase in flow resistance to the dry wind airflow (F) is minimized and the flow path of the dry wind airflow (F) is secured to the maximum. You can do it.

[Assembly of airflow guide and means to limit relative movement]

Hereinafter, with reference to FIGS. 20 to 22, the process of assembling and fixing the airflow guide 83 to the connecting duct portion 85 and the relative movement limiting means for the connecting duct portion according to an embodiment of the present invention will be described. .

As described above, the lower guide 831 is coupled to the duct body 851 of the connecting duct portion 85 through a two-step joining operation. Preferably, the two-step combination operation may include a simple vertical movement operation in the vertical direction and a simple rotational movement operation in the circumferential direction.

For vertical movement operation in the vertical direction, as shown in FIG. 20, with the cap cover 834 and the upper guide 832 coupled to the lower guide 831, the airflow guide 83 is connected to the connecting duct portion 85. It may be aligned to be placed on the upper side of the duct body 851.

At this time, the duct body 851 and the duct coupling part 8312 are positioned upward and downward so that the upper end 8511 of the duct main body 851 can be inserted into the lower end 8312b of the duct coupling part 8312 of the lower guide 831. The central axis may be aligned in the direction (U-D direction).

Additionally, the airflow guide 83 may be rotated clockwise with a predetermined angle range from the fixed position around the duct coupling portion 8312. In this way, the position where the airflow guide 83 is rotated clockwise becomes a position where the guide protrusion 8516 formed on the outer peripheral surface of the duct body 851 can be inserted into the first guide groove 8312d of the duct coupling portion 8312. .

As shown, when the alignment of the airflow guide 83 with respect to the duct body 851 is completed, first vertically move the airflow guide 83 downward (D-direction) along the arrow direction shown in FIG. 20(b). By moving, the upper end (8511) of the duct body (851) is inserted into the lower end (8312b) of the duct coupling portion (8312), and accordingly, the guide protrusion (8516) of the duct body (851) is formed into the first guide groove (8312d). It can be inserted into the lower part of .

In this way, when the airflow guide 83 is vertically moved downward (D-direction) with the guide protrusion 8516 of the duct body 851 inserted into the lower end of the first guide groove 8312d, the airflow guide 83 The vertical movement operation in the vertical direction is initiated.

Accordingly, the first guide groove 8312d of the duct coupling portion 8312 is guided by the guide protrusion 8516, which is in a stationary state, and moves vertically in the downward direction (D-direction).

Meanwhile, as shown in FIG. 21, when the guide protrusion reaches the top of the first guide groove 8312d, the airflow guide 83 moves further downward (D-direction) due to the action of the guide protrusion 8516. It becomes impossible to move vertically anymore.

At this time, since the guide protrusion 8516 has reached one end of the second guide groove 8312e, the airflow guide 83 cannot move vertically in the downward direction (D-direction), but as shown in Figure 21 ( Circumferential rotational movement along the arrow direction shown in a) is possible.

When the airflow guide 83 is rotated counterclockwise along the direction of the arrow for the circumferential rotation movement operation during the two-step coupling operation, the second guide groove 8312e rotates counterclockwise along the guide protrusion 8516 in the stationary state. Rotational movement can be initiated.

When the counterclockwise rotation movement of the airflow guide 83 begins, the guide protrusion 8516 reaches the stopper protrusion 8312f disposed adjacent to the other end of the second guide groove 8312e.

At this time, the stopper protrusion (8312f) can create a feeling of interference with the rotation of the airflow guide (83), and when additional rotational force is applied, the guide protrusion (8516) can pass over the stopper protrusion (8312f).

Afterwards, when the guide protrusion (8516) passes the stopper protrusion (8312f) and reaches the other end of the second guide groove (8312e), the air flow guide (83) no longer rotates counterclockwise due to the action of the guide protrusion (8516). It becomes impossible to do.

In this way, when rotational movement of the airflow guide 83 is no longer possible, the coupling between the guide lower guide 831 and the duct body 851 can be completed as shown in FIG. 22, and no other external force acts. One guide protrusion may be fixed to the other end of the second guide groove (8312e) by a stopper protrusion (8312f).

Therefore, the airflow guide 83 can be placed in a fixed position in the connecting duct portion 85 through a very simple manipulation process or assembly process including a simple vertical movement operation and a simple rotation movement operation.

However, once the arrangement of the airflow guide 83 is completed, movement by the airflow guide 83's own weight becomes impossible, but if a strong external force is applied, the jamming between the second guide groove 8312e and the guide projection 8516 may occur. There is a risk that it can be easily released.

Furthermore, the rattling of the lower guide 831 and the airflow guide 83 occurs due to the clearance between the duct coupling portion 8312 of the lower guide 831 and the duct body 851 of the connecting duct portion 85 due to the manufacturing tolerance. There is a possibility that it will occur.

As described above, the relative movement, especially the downward relative movement, of the airflow guide 83 due to release and clearance between the second guide groove 8312e and the guide protrusion 8516 is caused by the duct coupling portion 8312. It can be limited and minimized through the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 that protrude downward from the lower end 8312b.

Figure 23 shows the state in which the airflow guide 83 has been completely placed in a fixed position. For convenience, the cap cover 834 and upper guide 832 are omitted in Figure 23.

As shown in FIG. 23, when the fixing and arrangement of the airflow guide 83 is completed, between the first to third protruding ribs 8312h1, 8312h2, and 8312h3 and the male thread portion 8514 of the duct main body 851. Gaps each having a predetermined width may be formed.

As shown in the cross-sectional view shown in FIG. 25 and FIG. 27, the first protruding rib 8312h1 and the second protruding rib 8312h2 are disposed at equal intervals centered on the circular opening formed at the lower end 8312b of the duct coupling portion 8312. , and the third protruding rib 8312h3 may be formed to have different maximum protruding heights so that the gap with respect to the male thread portion 8514 at each position can be maintained below a predetermined level.

At this time, the gap between the first protruding rib 8312h1 and the male threaded portion 8514 of the duct body 851, the gap between the second protruding rib 8312h2 and the male threaded portion 8514 of the duct body 851, and The gap between the third protruding rib 8312h3 and the male thread portion 8514 of the duct body 851 may be provided differently depending on each manufacturing tolerance.

However, the overall downward relative movement amount of the airflow guide 83 may be limited based on the gap having the maximum width among these gaps.

At this time, the maximum width of the gap may preferably be 0.01 mm or less.

Limiting the maximum gap to 0.01 mm or less in this way means that even if each of the protruding ribs (8312h1, 8312h2, 8312h3) does not directly contact the male thread portion 8514 of the duct body 851, the relative movement amount is 0.01 mm or less. Alternatively, the shaking due to the relative displacement may be maintained at a level that the user cannot perceive.

Meanwhile, as shown in FIG. 24, the male thread portion 8514 of the duct body 851 may be provided as a right-hand thread so that locking occurs when rotating clockwise when viewed from above.

Therefore, when viewed from above, it extends in a spiral shape with the vertical position gradually lowering as it progresses clockwise.

Therefore, so that the clearances of each of the protruding ribs (8312h1, 8312h2, 8312h3) with respect to the male thread portion (8514) of the duct body (851) can be maintained at approximately a similar level, the first protruding rib (8312h1) and the second protruding rib (8312h1) 8312h2), and the third protruding rib 8312h3 may be arranged in the corresponding order along the clockwise direction when viewed from above.

That is, the protruding heights of the protruding ribs 8312h1, 8312h2, and 8312h3 may be arranged to gradually increase as they proceed clockwise, corresponding to the male thread portion 8514 of the duct body 851, which gradually decreases as it progresses clockwise.

Therefore, as described above, when the counterclockwise rotational movement operation is started with the vertical movement operation completed, the gaps between each of the protruding ribs 8312h1, 8312h2, and 8312h3 with respect to the male thread portion 8514 of the duct main body 851 are It gradually decreases.

In addition, as shown in FIG. 24, the external thread portion 8514 of the duct body 851 may be configured to have a number of rotations of at least 3 or more while advancing from the upper end 8514b to the lower end 8514a.

At this time, as shown in FIGS. 25 and 26, the thread 8523a of the fastening nut 852 screwed to the male thread portion 8514 of the duct body 851 is the male thread portion 8514 of the duct body 851. ) may be configured to have a rotation number smaller than that, for example, to have a rotation number of 2 rotations.

Therefore, when the screwing of the fastening nut 852 to the male threaded portion 8514 of the duct body 851 is completed, the number corresponding to the first one rotation from the top 8514b of the male threaded portion 8514 of the duct body 851 The upper side of the thread of the threaded portion 8514 may be maintained exposed toward the lower end 8312b of the duct coupling portion 8312.

Therefore, the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protrusion of the duct coupling portion 8312 are not affected by the thread 8523a provided on the inner peripheral surface 8523 of the fastening nut 852. The rib 8312h3 can be supported by the upper side of the male thread portion 8514 of the duct body 851 when relative movement in the downward direction occurs.

In addition, the maximum radial width of the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 are each formed to be the same, but the outer peripheral surface of the connecting duct portion 85 and the fastening nut ( It may be formed smaller than the gap between the inner peripheral surfaces 8523 of 852).

Accordingly, the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 may be maintained in a non-contact state with respect to the inner peripheral surface 8523 and the upper end 8522 of the fastening nut 852. .

Through this, even if the third protruding rib 8312h3 having the largest protruding height is inserted into the interior of the fastening nut 852, as shown in FIG. 26, the third protruding rib 8312h3 is attached to the inner peripheral surface of the fastening nut 852. It is possible to set a relative position with respect to the external thread portion 8514 of the duct body 851 regardless of the 8523 and the upper end 8522.

At this time, as described above, the lower surfaces of the first protruding rib (8312h1), the second protruding rib (8312h2), and the third protruding rib (8312h3) have the external thread portion (8514) of the duct body (851) extending in a spiral shape. ) may be provided as an inclined surface corresponding to the shape of the upper side.

The inclination angle of the lower surfaces of the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 will be configured to be approximately the same as the inclination angle of the male thread portion 8514 of the duct main body 851. You can.

Accordingly, the relative movement of the airflow guide 83 in the downward direction occurs due to external force, so that at least one of the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 is connected to the duct main body ( When in contact with the upper side of the male thread portion 8514 of 851), at least one of the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 is connected to the duct body 851. It may be in surface contact with the upper side of the male thread portion 8514.

That is, the lower surface of at least one of the first protruding rib 8312h1, the second protruding rib 8312h2, and the third protruding rib 8312h3 is entirely on the upper side of the male thread portion 8514 of the duct body 851. can be supported by

Therefore, since the relative contact area with respect to the male thread portion 8514 of the duct body 851 can be secured to the maximum, the downward relative movement of the airflow guide 83 is effectively prevented even if a strong external force is applied, and the airflow guide 83 ) can be configured to be stably supported.

[Detailed composition of fastening nut]

Hereinafter, the detailed configuration of the fastening nut 852 provided in the dishwasher 1 according to an embodiment of the present invention will be described with reference to FIGS. 28 and 29.

As described above, the fastening nut is screwed to the outer peripheral surface of the connecting duct portion 85 and serves to secure the connecting duct portion 85 to the lower surface 25 of the bottom tub 20c.

For this purpose, the fastening nut 852 is provided to have an overall cylindrical outer shape, and the cylindrical inner peripheral surface 8523 has threads 8523a that are screwed to the male thread 8514 of the duct body 851 of the connecting duct portion 85. ) may be provided in the form of a female thread.

As described above, the thread 8523a of the fastening nut may have a rotation speed of 2 rotations.

Therefore, when fixing and fastening the duct body 851, the upper end 8511 of the duct body 851 is connected to the tub 20 by screwing the fastening nut 852 to the male thread portion 8514 of the duct body 851. It can be fixed in an exposed state inside.

At this time, the fastening nut 852 is in close contact with the upper side of the lower surface 25 of the bottom tub 20c, and the flange 8513 of the duct body 851 is attached to the lower side of the lower surface 25 of the bottom tub 20c. In a state of close contact, the flange 8513 receives a pulling force toward the lower surface of the bottom tub 20c due to the coupling force of the fastening nut 852.

This has the effect of increasing the adhesion between the flange 8513 and the lower surface 25 of the bottom tub 20c. Therefore, the possibility of leakage of washing water to the outer peripheral surface of the duct body 851 can be significantly reduced. As a means to increase the effect of preventing leakage of washing water, an airtight ring 853 made of an elastic material may be additionally provided between the flange 8513 and the lower surface 25 of the bottom tub 20c.

Meanwhile, a plurality of stoppers 8521 that interact with the loosening prevention portion 8711e of the airflow guide 83 may be provided on the upper side of the fastening nut 852.

A plurality of stoppers 8521 may be formed by partially recessing the top 8522 and the outer peripheral surface 8524 of the fastening nut 852, and each stopper 8521 is arranged at equal intervals along the circumferential direction. It can be.

As described above, the other end of the loosening prevention part 8711e of the airflow guide 83 is separated from the second border wall 8711c and functions as a free end 8711e2, and the stopper 8521 of the fastening nut 852 ) It is possible to prevent rotational movement away from the correct position of the airflow guide (83) by directly contacting one side of the airflow guide (83).

Meanwhile, the fastening nut 852 is directly exposed to washing water during the washing process and rinsing process. In particular, since the fastening nut 852 is disposed on the upper side of the lower surface 25 of the bottom tub 20c, it is directly exposed to the washing space and, depending on the situation, may be exposed to the washing water filled in the lower surface 25 of the bottom tub 20c. It may be locked.

In order to prevent corrosion caused by washing water, the fastening nut 852 can be manufactured through plastic injection molding.

Meanwhile, when fastening to the duct body 851 is completed as described above, the lower surface 8525 of the fastening nut 852 is directly in close contact with the lower surface 25 of the bottom tub 20c.

At this time, a fine gap may occur between the lower surface 25 of the bottom tub 20c and the lower surface 8525 of the fastening nut 852 due to respective manufacturing tolerances, and through this gap the fastening nut 852 Washing water may flow into the space created by the inner peripheral surface 8523 of ), the outer peripheral surface of the duct body 851, and the lower surface 25 of the bottom tub 20c.

Because the gap can be formed very finely, the washing water once introduced is hardly discharged to the outside of the fastening nut 852.

In this way, there is a high possibility that corrosion will occur on the lower surface 25 of the bottom tub 20c due to the washing water that is not discharged after being introduced. In particular, since the dry air supply hole 254 formed by drilling the bottom tub 20c is formed inside the fastening nut 852, it is very likely that corrosion will occur in the dry air supply hole 254, and it is included in the washing water. There is a high possibility that a foul odor will occur due to the proliferation of bacteria.

As a means to prevent corrosion of the bottom tub 20c and generation of bad odor, the fastening nut 852 provided in the dishwasher 1 according to an embodiment of the present invention is connected to the bottom tub from the bottom surface 8525. It may include a plurality of contact protrusions 8526 extending toward (20c).

Each contact protrusion 8526 may be provided in the form of a protruding rib whose upper end is integrally connected to the lower surface 8525 of the fastening nut 852 and whose lower end extends toward the lower surface 25 of the bottom tub 20c. there is.

Each contact protrusion 8526 may be disposed on the bottom surface 8525 of the fastening nut 852, spaced apart from each other at a predetermined circumferential distance Dc along the circumferential direction.

At this time, the predetermined circumferential spacing may be formed to be larger than the maximum circumferential thickness (Wc) of each contact protrusion 8526.

Through this, a washing water passage through which washing water flows in and out can be provided between each contact protrusion 8526, and the lower surface 8525 of the fastening nut 852 is separated from the lower surface 25 of the bottom tub 20c. may be exposed to the washing area.

Therefore, the washing water does not remain in the space created by the inner peripheral surface 8523 of the fastening nut 852, the outer peripheral surface of the duct body 851, and the lower surface 25 of the bottom tub 20c, and can be effectively discharged to the outside of the fastening nut. It becomes possible.

Through this, corrosion of the bottom tub 20c, that is, corrosion of the dry wind supply hole 254, can be effectively prevented.

Meanwhile, each contact protrusion 8526 may be formed to have the same external shape.

At this time, as an example, each contact protrusion 8526 may have a tip shape in which the horizontal cross-sectional area gradually decreases as it progresses from the top to the bottom.

In addition, the lower contact end 8526a of the contact protrusion 8526, which comes into contact with the lower surface 25 of the bottom tub 20c, may be a curved surface formed convexly toward the lower surface 25 of the bottom tub 20c. there is. Therefore, at least a state of line contact can be maintained between the contact protrusion 8526 and the bottom tub 20c.

Through this shape of the contact protrusion, the coupling force or pressing force of the fastening nut 852 can be evenly distributed through each contact protrusion 8526 and act on the lower surface 25 of the bottom tub 20c. In addition, the tip shape can minimize the phenomenon of foreign substances, such as food, being caught or stuck between the contact protrusion 8526 and the bottom tub 20c.

Meanwhile, as shown in FIG. 29, the dry air supply hole 254 through which the upper end 8511 of the duct body 851 penetrates is formed on the convergence surface 251 to guide the washing water toward the sump hole 252. do.

The convergence surface 251 is formed to have a predetermined convergence inclination angle with respect to the horizontal direction so that the washing water moves by gravity.

Therefore, there may be a possibility that the pressing force of the fastening nut 852, which moves in the vertical direction when screwed to the male thread portion 8514 of the duct body 851, may not act equally through the contact protrusion 8526.

In this way, the lower contact end of the contact protrusion 8526 is formed around the dry air supply hole 254 so that the pressing force of the contact protrusion 8526 of the fastening nut 852 can be evenly distributed and act on the bottom tub 20c. A ring-shaped engaging surface 2541 pressed by 8526a can be formed.

At this time, the ring-shaped coupling surface 2541 may be configured to have an orientation extending in a horizontal direction perpendicular to the vertical direction in which the fastening nut 852 moves while being screwed.

Preferably, the ring-shaped coupling surface 2541 may be a ring-shaped bead surface formed by plastically deforming the area around the dry air supply hole 254 through press processing.

In this way, by separately forming the engagement surface 2541 extending in the horizontal direction on the portion where the pressing force of the fastening nut 852 directly acts, each contact protrusion 8526 evenly and uniformly applies the pressing force to the bottom tub ( 20c) can be used.

Meanwhile, as shown, the bottom tub 20c has a cylindrical portion 2542 that extends in the circumferential direction along the drying air supply hole 254 and protrudes upward toward the bottom surface 8525 of the fastening nut 852. ) may be further provided.

The purpose of the cylindrical portion 2542 is to extend the height of the submerged water surface of the washing water filling the lower surface 25 of the bottom tub 20c in the upward direction.

As shown, in order to prevent interference with the fastening nut 852, the height at which the cylindrical portion 2542 protrudes from the lower surface 25 of the bottom tub 20c is set so that the contact protrusion 8526 is at the bottom of the fastening nut 852. It may be formed to be smaller than the height protruding from the face 8525.

Additionally, the height at which the cylindrical portion 2542 protrudes from the lower surface 25 of the bottom tub 20c may be maintained constant as it moves along the circumferential direction.

Through this, it is possible to further reduce the possibility of washing water flowing directly into the drying air supply hole 254, and further reduce the possibility of corrosion of the drying air supply hole 254 and the cylindrical portion 2542 due to the washing water. It will have an effect.

As described above, the present invention has been described with reference to the illustrative drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformation can occur. In addition, although the operational effects according to the configuration of the present invention were not explicitly described and explained while explaining the embodiments of the present invention above, it is natural that the predictable effects due to the configuration should also be recognized.

1: Dishwasher 10: Case
20: Tub 30: Door
40: driving part 50: storage part
60: injection unit 80: dry wind supply unit
83: Airflow guide 90: Base

Claims (20)

A tub storing objects to be washed and having a washing space with an open front;
a drying wind supply unit disposed on a lower side of the tub and generating drying wind for drying the washing object; and
an airflow guide that changes the flow direction of the drying wind supplied from the drying wind supply unit and supplies it to the washing space;
Including,
The drying wind supply part extends upwardly through the lower surface of the tub and includes a connection duct part that supplies the drying wind to the interior of the airflow guide,
The airflow guide is detachably coupled to the connection duct,
When the connection to the connection duct is completed, the airflow guide is a dishwasher whose relative movement in the downward direction is restricted by a male thread provided on the outer peripheral surface of the connection duct.
In paragraph 1:
The airflow guide includes a cylindrical duct coupling portion into which the upper end of the connecting duct portion is inserted and coupled,
A dishwasher wherein the downward relative movement of the duct coupling portion is limited by the male thread portion.
In paragraph 2:
At least one protruding rib is integrally formed at the bottom of the duct coupling portion and protrudes downward toward the male screw portion,
A dishwasher wherein when the downward relative movement occurs, the lower end surface of the at least one protruding rib comes into contact with the male screw portion.
In paragraph 3:
When the coupling of the duct coupling portion and the connecting duct portion is completed, a gap having a predetermined width is formed between the lower end surface of the at least one protruding rib and the male thread portion,
A dishwasher wherein the downward relative movement is limited to less than the predetermined width.
In paragraph 4:
The at least one protruding rib,
A dishwasher comprising a first protruding rib, a second protruding rib, and a third protruding rib disposed at equal intervals around a circular opening through which an upper end of the connection duct part passes.
In paragraph 5:
A dishwasher wherein the first protruding rib, the second protruding rib, and the third protruding rib each have different heights protruding downward from the bottom of the duct coupling portion.
In paragraph 6:
The maximum height at which the first protruding rib protrudes from the bottom of the duct coupling portion is the first height,
The maximum height at which the second protruding rib protrudes from the bottom of the duct coupling portion is a second height greater than the first height,
A dishwasher wherein the maximum height at which the third protruding rib protrudes from the bottom of the duct coupling portion is a third height greater than the second height.
In paragraph 7:
A dishwasher wherein the circumferential width of the first protruding rib, the circumferential width of the second protruding rib, and the circumferential width of the third protruding rib are equal to each other.
In paragraph 7:
A dishwasher wherein the first protruding rib, the second protruding rib, and the third protruding rib are disposed at the bottom of the connection duct portion in a clockwise direction when viewed from the upper side of the airflow guide.
In paragraph 9:
The bottom surface of the first protruding rib, the bottom surface of the second protrusion rib, and the bottom surface of the third protrusion rib each have an inclined surface whose height protruding from the bottom of the duct coupling portion increases as it progresses clockwise. A dishwasher that works.
In paragraph 4:
The dry air supply unit further includes a fastening nut that is screwed to the male thread part of the connection duct unit and secures the connection duct unit to the lower surface of the tub,
When the coupling of the duct coupling portion and the connecting duct portion is completed, the at least one protruding rib is in a non-contact state with respect to the fastening nut.
In paragraph 11:
A dishwasher wherein the maximum radial width of the at least one protruding rib is smaller than the gap between the outer peripheral surface of the connection duct portion and the inner peripheral surface of the fastening nut.
In paragraph 11:
A dishwasher wherein at least one of the at least one protruding rib is inserted into the fastening nut.
In paragraph 11:
A dishwasher wherein the duct coupling portion is coupled to the connecting duct portion through a two-step coupling operation.
In paragraph 14:
The two-step combination operation is,
A vertical movement operation to relatively move the airflow guide in a downward direction; and
A dishwasher comprising a rotational movement operation for relatively moving the airflow guide in a circumferential direction after the vertical movement operation is completed.
In paragraph 15:
When the rotation movement operation is initiated,
A dishwasher in which a gap between the lower end of the at least one protruding rib and the male thread portion gradually decreases.
In paragraph 15:
When the rotation movement operation is initiated,
The airflow guide is a dishwasher that rotates in a direction opposite to the rotation direction for screwing the fastening nut to the male thread of the connection duct portion.
In paragraph 15:
On the inner peripheral surface of the duct joint, a first guide groove extending linearly in the vertical direction, and a second guide groove whose one end is integrally connected to the upper end of the first guide groove and extending in an arc shape along the circumferential direction are formed. become,
A dishwasher wherein a guide protrusion is provided on the outer peripheral surface of the connecting duct portion to protrude toward the inner peripheral surface of the connecting duct portion and moves along the first guide groove and the second guide groove during the two-step joining operation.
In paragraph 18:
The vertical movement operation is guided while the guide protrusion is inserted into the first guide groove,
A dishwasher in which the rotational movement operation is guided while the guide protrusion is inserted into the second guide groove.
In paragraph 19:
When the rotation and movement operation is completed,
A dishwasher wherein the relative movement of the guide protrusion of the duct coupling portion in the upward direction is restricted by the second guide groove.

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