KR20230072945A - Dish washer - Google Patents

Abstract

The present invention has a symmetrical shape for miniaturization and a shape independent of the corner shape of the tub, and applies an airflow guide formed by combining at least two divided bodies to achieve a rather complicated internal flow direction conversion structure, but a symmetrical shape The present invention relates to a dishwasher capable of effectively preventing a deterioration in drying efficiency that may occur due to a change in the direction of a discharge port when an erroneous assembly occurs by effectively preventing an erroneous assembly between divided bodies due to external appearance.

Description

Dishwasher {DISH WASHER}

The present invention relates to a dishwasher, and more specifically, applies an air flow guide formed by combining at least two divided bodies to achieve a somewhat complicated internal flow direction conversion structure, but an error between the divided bodies due to the symmetrical outer shape. The present invention relates to a dishwasher capable of effectively preventing a deterioration in drying efficiency that may occur due to a change in a discharge port direction when an erroneous assembly occurs by effectively preventing an assembly phenomenon.

BACKGROUND ART A dishwasher is a device that cleans dishes and cooking utensils stored therein by spraying washing water such as water therein. At this time, the washing water used for washing may include a detergent.

The dishwasher includes a washing tub forming a washing space, a storage unit for accommodating objects to be washed inside the washing tub, a spray arm for spraying washing water into the storage unit, and a sump storing water and supplying washing water to the spray arm. It is common to be

By using such a dishwasher, it is possible to reduce the time and effort required for washing dishes to wash objects such as tableware after eating, thereby contributing to user convenience.

Conventionally, a dishwasher is configured to perform a washing cycle for washing an object, a rinse cycle for rinsing an object for washing, and a drying cycle for drying an object after washing and rinsing.

Recently, a dishwasher capable of reducing the drying time and improving the sterilization effect of objects to be washed by supplying high-temperature drying wind to the inside of the washing tub during the drying cycle has been released.

In this regard, German Patent Publication No. 102015212869 (Prior Document 001) discloses a dishwasher equipped with a hot air supply device for generating and supplying high-temperature drying air after washing and rinsing cycles are completed.

The dishwasher disclosed in Prior Document 001 is configured such that a dry air spraying unit for spraying dry air generated through a hot air supply device disposed below the tub into the tub is disposed inside the tub.

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

At this time, the dry air blowing unit can be fastened to the hot air supply pipe through a simple press-fitting operation, so the assembly or fastening process can be simplified.

However, it is designed to have an external shape corresponding to the corner shape of the tub in order to set the dry air blowing unit in a proper position and prevent erroneous assembly. That is, it is configured so that the fastening process does not proceed unless it is in a predetermined position through the shape of the corner of the tub and the outer shape of the drying air blowing unit corresponding thereto.

However, since the drying air blowing unit of Prior Document 001 has an external shape corresponding to the shape of the corner of the tub, it cannot help but have a considerably large external size.

Therefore, as the dry wind blasting unit having a large external size is disposed in the washing space of the tub, there is a risk of a substantial reduction in the effective washing space of the tub, and there is a concern about other parts including the lower spray arm and lower rack disposed inside the tub. Interference may occur.

German Patent Publication No. 102015212869

The present invention has been made to solve the above-mentioned problems of the prior art, and is provided with an air flow guide that is smaller than the prior art, thereby preventing a substantial reduction in the effective washing space of the tub, and other parts disposed inside the tub. A first object is to provide a dishwasher capable of preventing interference with the airflow guide and securing a sufficient distance between the inner surface of the tub and reducing the possibility of food sticking thereto.

In addition, the present invention has a symmetrical shape for miniaturization and a shape independent of the corner shape of the tub, and applies an air flow guide formed by combining at least two divided bodies to achieve a rather complicated internal flow direction conversion structure, A second object is to provide a dishwasher capable of effectively preventing a deterioration in drying efficiency that may occur due to a change in the direction of a discharge port when an erroneous assembly occurs by effectively preventing an erroneous assembly between divisions due to a symmetrical shape.

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

A dishwasher according to the present invention includes a tub having an open front washing space in which an object to be washed is accommodated; a drying air supply unit disposed at a lower side of the tub and supplying dry air to the washing space by generating dry air for drying the object to be washed; and an air flow guide disposed in the washing space and configured to change a flow direction of the drying air supplied from the drying air supply unit and spray the air flow guide coupled to the drying air supply unit and generated by the drying air supply unit. a lower guide into which dry wind is introduced; And an upper guide having a lower surface open and fastened to an upper side of the lower guide to form an outlet through which the drying wind is sprayed together with the lower guide, wherein the air flow guide moves the upper guide out of a preset position and It is characterized in that it has an erroneous assembly prevention part that prevents coupling to the lower guide. Through this, it is possible to effectively prevent deterioration in drying efficiency that may occur due to a change in the direction of the discharge port when an erroneous assembly occurs.

In addition, the upper guide cannot be fastened to the lower guide at a position out of the preset position by the erroneous assembly prevention unit.

In addition, the lower guide includes a guide body having a plate shape having a reference surface forming a lower edge of the discharge port and coupled to an open lower surface of the upper guide, and the misassembly prevention unit is located outside the guide body It includes an erroneous assembly prevention groove extending along the rim and formed by being depressed lower than the reference plane in the vertical direction, and when the upper guide is arranged at the predetermined position, the upper inside the erroneous assembly prevention groove. The lower end of the guide may be inserted into a state.

In addition, when the upper guide is arranged out of the preset position, the lower end of the upper guide may not be inserted into the erroneous assembly prevention groove.

In addition, the reference surface may extend to an edge of one side of the guide body, and the erroneous assembly prevention groove may extend along an outer edge of the guide body except for a region where the reference surface is formed.

In addition, the upper guide may include a notch hole forming a front edge, a rear edge, and an upper edge of the discharge port, and a lower end of the notch hole extends to a lower end of the upper guide to be entirely open.

In addition, when the upper guide is coupled to the lower guide in a state in which the upper guide is arranged at the predetermined location, the reference surface of the lower guide may be inserted into the open lower end of the notch hole.

In addition, when the upper guide is coupled to the lower guide in a state in which the upper guide is arranged out of the preset position, the lower end of the upper guide is caught on the reference surface of the lower guide to the inside of the erroneous assembly prevention groove Insertion may become impossible.

In addition, the lower guide further includes a cylindrical duct coupling part formed integrally with the guide body and having a lower end connected to the drying air supply unit, and the misassembly prevention unit protrudes from an outer surface of the duct coupling unit. an upper guide stumbling protrusion; and a catching hole provided at a position corresponding to the upper guide catching protrusion and formed penetrating the inside and outside of the upper guide.

In addition, when the upper guide is coupled to the lower guide in a state in which the upper guide is arranged at the predetermined position, the upper guide locking protrusion is inserted into the locking hole, so that the upper guide can be fastened to the lower guide there is.

In addition, when the upper guide is coupled to the lower guide in a state in which the upper guide is arranged out of the preset position, the upper guide locking protrusion may be in a state in which it is impossible to insert into the locking hole.

The dishwasher according to the present invention has an effect of improving drying efficiency and shortening drying time by evenly distributing the drying air and ensuring sufficient time for the drying air to remain inside the tub.

In addition, the dishwasher according to the present invention has an effect of effectively preventing the reverse inflow of washing water through the outlet directly exposed to the washing space.

In addition, the dishwasher according to the present invention has an effect of effectively preventing washing water introduced into the airflow guide from flowing into the drying air supply unit.

In addition, the dishwasher according to the present invention has an effect of simplifying the process of assembling and fixing the drying air supply unit by simplifying the assembly structure and the fixing structure of the airflow guide for spraying dry air.

In addition, the dishwasher according to the present invention has an effect of effectively preventing the position of the preset discharge port from being changed through a means capable of preventing erroneous assembly between the upper guide and the lower guide constituting the air flow guide.

In addition, the dishwasher according to the present invention has an effect of effectively preventing the air flow guide from being released or separated from the set position after being assembled and fixed to the drying air supply unit through a simple structure.

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a front perspective view of a dishwasher according to an embodiment of the present invention.
2 is a schematic cross-sectional view of the dish washing machine shown in FIG. 1;
3 is a front perspective view illustrating a state in which a drying air supply unit of the dishwasher according to an embodiment of the present invention is accommodated in a base;
4 is a front perspective view of the drying air supply unit shown in FIG. 3;
Figure 5 is an exploded perspective view of Figure 4;
6 is a plan view illustrating a bottom tub equipped with an airflow guide of the dishwasher according to an embodiment of the present invention.
7 and 8 are partially enlarged views of FIG. 6 .
9 is a plan view illustrating the relative positions of a lower spray arm and an air flow guide.
10 is experimental data obtained by measuring temperature distribution during a drying cycle according to the prior art, and FIG. 11 is experimental data obtained by measuring temperature distribution during a drying cycle according to an embodiment of the present invention.
12 and 13 are exploded perspective views of the air flow guide shown in FIG. 6 .
14 is a front view of the air flow guide shown in FIGS. 12 and 13;
FIG. 15 is a cross-sectional view of FIG. 14 for explaining a relative position of a lower spray arm with respect to a nozzle.
16 is a side view illustrating a state in which an air flow guide is fixed to a connecting duct unit.
17 and 18 are perspective views of the air flow guide assembled in the correct position, and FIG. 19 is a perspective view of the air flow guide in an incorrectly assembled state.
20 to 22 are a plan view, a front view and a cross-sectional view for explaining a process of assembling the air flow guide to the connection duct unit.
23 and 24 are cross-sectional views for explaining the structure and function of the loosening prevention unit provided in the air flow guide.

The above objects, features and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter 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 accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

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

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

Hereinafter, the arrangement of an arbitrary element on the "upper (or lower)" or "upper (or lower)" of a component means that an arbitrary element is placed in contact with the upper (or lower) surface of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

In addition, when a component is described as "connected", "coupled" or "connected" to another component, the components may be directly connected or connected to each other, but other components may be "interposed" between each component. ", or each component may be "connected", "coupled" or "connected" through other components.

Singular expressions used herein include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or some of the steps It should be construed that it may not be included, or may further include additional components or steps.

Also, singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "consisting of" or "comprising" should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or some of the steps It should be construed that it may not be included, or may further include additional components or steps.

Throughout the specification, when "A and/or B" is used, this means A, B or A and B unless otherwise specified, and when used as "C to D", this means unless otherwise specified As long as there is no, it means C or more and D or less.

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

[Overall structure of dishwasher]

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

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

As shown in FIGS. 1 and 2, the dishwasher 1 according to the present invention includes a case 10 forming an outer shape, and a washing space 21 installed inside the case 10 and washing objects to be washed. Forming a washing tub 20 with an open front, a door 30 opening and closing the open front of the washing tub 20, located at the bottom of the washing tub 20 and supplying and collecting washing water for washing the object to be washed , circulating and draining drive unit 40, detachably provided in the washing space 21 inside the washing tank 20 and installed adjacent to the storage unit 50 in which the object to be washed is seated, and the storage unit 50 and a spraying unit 60 for spraying washing water for washing the object to be washed.

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

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

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

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

In addition, on the inner surface of the tub 20, a plurality of brackets having the purpose of supporting and installing functional components such as the accommodating part 50 and the spraying part 60 to be described later inside the tub 20 are disposed. It can be.

Meanwhile, the drive unit 40 includes a sump 41 for storing washing water, a sump cover 42 for separating the sump 41 from the tub 20, and a water supply unit for supplying washing water to the sump 41 from the outside. 43, a drainage unit 44 for discharging the washing water of the sump 41 to the outside, a water supply pump 45 for supplying the washing water of the sump 41 to the injection unit 60, and a supply passage 46 It can be configured to include.

The sump cover 42 is disposed above the sump 41 and may serve to separate the tub 20 and the sump 41 . In addition, 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 injection unit 60 into the sump 41 .

That is, the washing water sprayed toward the dishes from the jetting unit 60 may fall to the lower portion of the washing space 21 and be returned to the sump 41 via the sump cover 42 .

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

One end of the water supply pump 45 may be connected to the sump 41 and the other end may be connected to the supply passage 46 . An impeller 451 and a motor 453 may be provided inside the water supply pump 45 . When power is supplied to the motor 453, the impeller 451 rotates, and the washing water in the sump 41 is pressurized, and then supplied to the injection unit 60 via the supply passage 46.

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

Illustratively, the supply passage 46 includes a first supply passage 461 connected to the lower injection arm 61, and a second supply passage 463 connected to the upper injection arm 62 and the top nozzle 63. A supply passage switching valve 465 may be provided in the supply passage 46 to selectively open and close 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 spraying unit 60 is provided to spray washing water to dishes stored in the storage unit 50 .

In more detail, the spray unit 60 is located below the tub 20 and sprays washing water to the lower rack 51, and between the lower spray arm 61 and the lower rack 51 and the upper rack 52. The upper spray arm 62 is located and sprays the washing water to the lower rack 51 and the upper rack 52, and is located above the tub 20 and sprays the washing water to the top rack 53 or the upper rack 52 It may include a top nozzle 63 that does.

In particular, the lower spray arm 61 and the upper spray arm 62 are provided in the washing space 21 of the tub 20 to 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 as to spray washing water while rotating from the lower portion of the lower rack 51 toward the lower rack 51 .

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

Meanwhile, a reflector for converting the washing water sprayed from the lower spray arm 61 upward (U-direction) may be further provided on the lower surface 25 of the tub 20 to increase washing efficiency.

As for the detailed configuration of the injection unit 60, configurations already known in the art can be applied, and hereinafter, description of the specific configuration of the injection unit 60 will be omitted.

Meanwhile, the washing space 21 may include a storage unit 50 for storing dishes.

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

Exemplarily, in FIG. 2 , a lower rack 51 located below the tub 20 and capable of accommodating relatively large large dishes, and an upper part located above the lower rack 51 and capable of accommodating medium-sized dishes An embodiment in which a storage unit including a rack 52 and a top rack 53 located above the tub 20 and capable of storing small dishes and the like is shown. Although the present invention is not limited thereto, description will be made based on an embodiment of a dishwasher provided with three accommodating units 50 as shown.

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

To this end, guide rails 54 may be provided on both side walls forming the inner circumferential surface of the tub 20, and illustratively, the guide rails 54 include an upper rail 541, a lower rail 542, and a top rail. (543).

Wheels may be provided under the lower rack 51, the upper rack 53, and the top rack 53, respectively. The user can store dishes in these lower racks 51, upper racks 53, and top racks 53 through the front of the tub 20 to the outside, or easily wash dishes from them. can be taken out

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

Meanwhile, the door 30 has the purpose of opening and closing the open front surface 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 opened front surface, and the door 30 is opened using the hinge part as a rotating shaft.

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

As shown, the control panel 32 includes a display 33 for visually displaying information about the current operating state of the dishwasher, a selection button for inputting a user's selection operation, and a power on/off switch for the dishwasher. A button unit 34 including a power button or the like to which a user's manipulation 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 the lower rack 51 of the storage unit 50 can be supported when the door 30 is opened. form a seating surface.

To this end, when the door 30 is fully opened, the inner surface of the door 30 preferably forms a horizontal plane state in the same direction as the direction in which the guide rails 54 in which the lower rack 51 is guided extend.

The door 30 may be rotatably provided between a closed position and a full-open position, and an intermediate stop position may be formed between the closed position and the full-open position.

The door 30 may be maintained in a stopped state at an intermediate stop position, and at this time, the washing space 21 of the tub 20 may be partially opened to the outside. When the door 30 is positioned at an intermediate stop position, a drying air supply unit 80 to be described later may be operated to supply high-temperature drying air or low-temperature drying air to the washing space 21 .

Meanwhile, although not shown, a drying air supply unit 80 for generating and supplying high-temperature drying air to the inside of the tub 20 may be provided below the tub 20 .

[Detailed configuration of the drying air supply unit]

Hereinafter, a detailed configuration of the above-described drying air supply unit 80 will be described with reference to FIGS. 3 to 5 .

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

Illustratively, the drying air supply unit 80 may be disposed at a position adjacent to the rear surface 93 of the base 90, and is generally located between the water leak detection unit and the rear surface 93 of the base 90. It can be arranged side by side on the rear surface (93) of.

Such an arrangement position may be selected in consideration of the characteristics of the drying air supply unit 80 in which high heat of 100° C. or higher is generated in the high-temperature drying air supply mode. That is, a location avoiding electric components that are relatively highly affected by high heat may be selected.

In addition, such an arrangement position may be selected based on the position of the drying air supply hole formed on the lower surface of the tub 20 . That is, in consideration of the user's safety, the drying air supply hole through which the drying air is introduced may be formed as a lower surface of the tub 20 at a corner adjacent to the rear and left sides.

The drying air supply unit 80 may be disposed below the drying air supply hole to effectively generate and supply dry air to the drying air supply hole formed at this location.

However, the arrangement position of the drying air supply unit 80 is merely exemplary, and, unlike this, a position adjacent to the left side 94, the right side 95 or the front side 92 of the base 90 rather than the rear side 93. can be placed in Although the present invention is not limited thereto, hereinafter, the drying air supply unit 80 will be described based on an embodiment in which the rear surface 93 of the base 90 is disposed side by side adjacent to the rear surface 93 .

4 and 5, the detailed configuration of the drying air supply unit 80 is shown.

As shown, the drying air supply unit 80 for generating and supplying dry air to the inside of the tub 20 includes a blowing fan for generating a dry air stream supplied to the inside of the tub 20, and rotation of the blowing fan. It may include a blower motor 83 generating driving force, a heater 84 heating dry air, and a heater housing 81 having an air passage C formed therein.

The blowing fan is disposed on the upstream side of the inlet 8111 side of the heater housing 81 in the direction of the dry air flow, and accelerates the air through the air passage C formed inside the heater housing 81 to dry the air. It serves to create air currents.

In the blowing fan, a blowing motor 83 that generates rotational driving force of the blowing fan may be modularized and accommodated in the fan housing 82 .

There is no restriction on the type of the blowing fan applied to the drying air supply unit 80, but a sirocco fan is preferable in consideration of locational and spatial restrictions in which the blowing fan is installed.

As in the illustrated embodiment, when a sirocco fan is applied, external air may be sucked in from the center of the fan in a direction parallel to the rotating shaft 831, and the air may be accelerated and discharged outward in a radial direction. The accelerated and discharged air forms a dry wind stream and may be introduced into the air passage C inside the heater housing 81 via the fan housing 82 and the inlet 8111 of the heater housing 81 .

As illustrated, the fan housing 82 may be exemplarily fixed to a connection tab 8114 provided in the heater housing 81 through a fastening means such as a screw bolt (not shown).

The heater 84 is disposed in the air passage C of the heater housing 81, and is preferably directly exposed to the dry wind air flow F inside the air passage C to heat the dry wind air flow F. play a role

When the drying air supply unit 80 supplies high-temperature drying air, power is supplied to the heater 84 to heat the drying air, and when the drying air supply unit 80 supplies low-temperature drying air, the heater 84 ) It may be configured so that the operation of the heater 84 is stopped by cutting off the power supplied to it.

At this time, when the low-temperature drying air is supplied, the operation of the blowing motor 83 may be maintained so that the drying air flow F may be generated.

The type of heater 84 provided in the drying air supply unit 80 according to an embodiment of the present invention is not limited, but by way of example, it has a relatively simple structure and has excellent heating efficiency. As will be described later, the tub 20 A tube-shaped sheath heater, which is advantageous in preventing electric leakage by reverse inflow washing water from the inlet, may be selected.

In order to increase heat exchange efficiency, the heater body 841 is directly exposed to the dry wind airflow F in the air passage C of the heater housing 81, and has a three-dimensional shape that is bent multiple times to secure a heat transfer area. can be configured.

One end and the other end of the heater body 841 may pass through the upper surface of the heater housing 81 and extend upward.

In addition, a pair of terminals 842 for receiving electric power may be formed at one end and the other end of the heater body 841 .

As shown, a pair of terminals 842 may be installed and fixed to the heater housing 81 through a terminal fixing part 843 . At this time, a fixing slot 8113 may be provided on the upper surface of the heater housing 81 so that the terminal fixing part 843 can be coupled in a sliding manner.

Meanwhile, a main body support 844 may be disposed inside the heater housing 81 to firmly support the heater main body 841 on the air passage C. As shown in FIG. 5 , the main body support 844 may be formed by press-processing a metal plate to have a shape corresponding to the outer surface of the tubular heater main body 841 .

On the other hand, as shown in FIGS. 4 and 5, the upper surface of the housing body 811 of the heater housing 81 detects the temperature of the high-temperature drying wind generated through the heater 84 or determines whether the heater 84 is overheated. A temperature sensor may be provided as the temperature sensing unit 86 to sense.

For example, the temperature sensor may include a thermistor 861 that detects the temperature of the drying air and a thermostat 862 that detects whether the heater 84 is overheated.

An output signal of the temperature sensor may be transmitted to a control unit (not shown), and the control unit may receive the output signal of the temperature sensor and determine the temperature of the high-temperature drying air and whether or not it is overheated. When overheating occurs, the control unit may switch the operation mode of the drying air supply unit 80 from a high-temperature drying air supply mode to a low-temperature drying air supply mode by cutting off power supply to the heater 84 .

On the other hand, the heater housing 81 includes a housing body 811 in which an air passage C having an inlet 8111 and an outlet 8112 is formed therein.

The heater housing 81 may be formed in a substantially hexahedron box shape in which an air passage C is formed.

In more detail, the heater housing 81 has a length in the longitudinal direction D2 from the inlet 8111 formed at the front end to the outlet 8112 formed at the rear end, based on the flow direction of the dry air flow, It may be formed larger than the length in the transverse direction D1 perpendicular to the longitudinal direction D2.

This is to improve heat exchange efficiency with the heater 84 disposed inside the heater housing 81 by securing the length of the air passage C as long as possible based on the flow direction of the dry air flow.

Based on the illustrated embodiment, the front and right sides of the heater housing 81 are entirely open.

The right side, which becomes the front end based on the flow direction of the dry air flow, is entirely open to form an inlet 8111 of the air passage C, and is fluidly connected to the fan housing 82 described above.

A housing cover 812 may be coupled to the open front surface to be closed. As will be described later, an extension surface 8116 formed in a flange shape is provided on the edge of the open front surface. The housing cover 812 is coupled to the expansion surface 8116, and the expansion surface 8116 serves to increase a contact area or coupling area with the housing cover 812.

An outlet 8112 of the air passage C may be formed at a rear end side based on the flow direction of the dry air flow. At this time, for example, the outlet 8112 may be formed on the upper side of the housing body 811 as a position adjacent to the rear end side.

As described above, the inside of the housing body 811 accommodates the heater 84 generating high heat. Accordingly, the housing body 811 may be formed of a material suitable for a high-temperature environment generated by the heater 84 accommodated therein, preferably a lightweight metal material.

Meanwhile, the drying air supply unit 80 may further include a connection duct unit 85 coupled to the outlet 8112 side of the heater housing 81 and having an air passage formed therein.

As described above, the heater housing 81 and the blowing fan are disposed on the lower side of the lower surface of the tub 20 . The connection duct part 85 serves to guide the drying air discharged from the heater housing 81 to move toward a preset position, that is, the drying air supply hole of the tub 20 .

Exemplarily, the preset position may be the lower surface of the tub 20, and the drying air supply hole into which the dry air flow F guided to the connection duct unit 85 is introduced is the lower surface of the tub 20, and It may be formed at a corner adjacent to the left side.

The duct body 851 of the connection duct unit 85 may be configured to have a shape capable of connecting the drying air supply hole of the tub 20 and the outlet 8112 of the heater housing 81, as in the illustrated embodiment. there is.

Illustratively, in the duct body 851 of the connection duct unit 85, the lower end 8512 communicates with the outlet 8112 of the heater housing 81 and the upper end 8511 extends in a vertical direction to supply a drying air supply hole. It may be configured in a connected cylinder shape.

Fastening tabs 8515 for fastening and fixing to the heater housing 81 may be provided at a plurality of locations on the lower end 8512 of the duct body 851 .

Meanwhile, considering the shape of the outlet 8112 of the heater housing 81, the lower end 8512 of the duct body 851 may have a square cylinder shape, and the upper end 8511 of the duct body 851 to prevent water leakage. may have a cylindrical shape. That is, for the efficiency of coupling between the upper end 8511 of the duct body 851 and the drying air supply hole of the tub 20 and leakage prevention, the duct body 851 may be formed in a cylindrical shape.

As a means for the efficiency of such fastening and leakage prevention, a ring-shaped flange 8513 and a male screw portion 8514 may be provided at the upper end 8511 side of the duct body 851.

The upper end 8511 of the duct body 851 extends upward (U-direction) through the lower surface of the tub 20, and the upper end 8511 and the male threaded portion 8514 of the duct body 851 are at least It may partially pass through the lower surface of the tub 20 and protrude toward the inside of the tub 20 .

A fastening nut 852 is coupled to the male screw portion 8514 disposed passing through the inside of the tub 20 .

When the duct body 851 is fixed and fastened, the fastening nut 852 is screwed into the male threaded portion 8514 inside the tub 20, so that the upper end 8511 of the duct body 851 is connected to the tub 20. It can be fixed in a state exposed to the inside.

That is, in a state where the fastening nut 852 is in close contact with the upper side of the lower surface of the tub 20 and the ring-shaped flange 8513 is in close contact with the lower side of the lower surface of the tub 20, the fastening nut 852 Due to the bonding force, the flange 8513 receives a pulling force toward the lower surface of the tub 20 . Through this, an effect of increasing adhesion between the flange 8513 and the lower surface of the tub 20 is obtained. Therefore, the possibility of leakage of washing water to the outer circumferential surface of the duct body 851 can be significantly reduced. As a means for enhancing the effect of preventing leakage of washing water, a sealing ring 853 made of an elastic material may be additionally provided between the flange 8513 and the lower surface of the tub 20 .

On the other hand, the connection duct part 85 serves to fix the heater housing 81 in addition to guiding the dry air flow F.

That is, when the upper end 8511 of the duct body 851 is fixed to the tub 20 through the fastening nut 852, the rear end of the heater housing 81 is restricted in vertical movement by the duct body 851 and is fixed. become a state

Through this, a support structure for the upper side of the drying air supply unit 80 can be achieved without additional fastening means.

The support structure for the lower side of the drying air supply unit 80 may be achieved through the damper and the support rib 96 of the base 90 as will be described later.

Meanwhile, the drying air supply unit 80 according to an embodiment of the present invention may further include an air flow guide 87 for changing the direction of the dry air flow supplied through the duct body 851 .

As shown in FIG. 4, the air flow guide 87 includes a lower guide 871 fitted to the upper end 8511 of the duct body 851 and an upper guide 872 coupled to the upper side of the lower guide 871 can include

Between the lower guide 871 and the upper guide 872, a flow path conversion structure in which the direction of the dry wind airflow is changed may be formed.

Meanwhile, the air flow guide 87 is directly exposed to the washing space 21 formed inside the tub 20 . Therefore, there is a possibility that some of the washing water scattered during the washing or rinsing process may flow back into the heater housing 81 through the air flow guide 87 . As such, means for preventing and minimizing the inflow of washing water into the air flow guide 87 may be provided in the air flow guide 87 .

In addition, a drain hole for discharging reverse inflow washing water may be provided inside the heater housing 81 .

On the other hand, the drying air supply unit 80 of the dishwasher 1 according to an embodiment of the present invention is for maintaining a state in which the heater housing 81 is spaced upward from the bottom surface 91 of the base 90. A plurality of legs 813 and 814 may be further included.

In this way, by separating the heater housing 81, in which high temperatures are generated, from the base 90 through the plurality of legs 813 and 814, heat directly conducted to the base 90 through the heater housing 81 can be minimized. there is.

As shown, the plurality of legs 813 and 814 have one end connected to the lower side of the inlet 8111 of the heater housing 81 and the other end extending toward the bottom surface 91 of the base 90. It may include a leg 813 and a second leg 814 having one end connected to the lower side of the outlet 8112 of the heater housing 81 and the other end extending toward the bottom surface 91 of the base 90. there is.

As described above, since the length of the heater housing 81 in the longitudinal direction D2 is much larger than the length in the transverse direction D1, the first leg ( 813) and the second leg 814 may be disposed farthest apart from each other along the longitudinal direction D2.

As a position that can be spaced farthest apart, one end of the vertical extension 8131 of the first leg 813 is at the lower side of the inlet 8111 of the heater housing 81, and the vertical extension of the second leg 814 One end may be fixed to the lower side of the outlet 8112 of the heater housing 81 by welding or the like.

These first legs 813 and second legs 814, similar to the heater housing 81, may be formed of a lightweight metal material suitable for a high temperature environment, preferably in the transverse direction (D1). It may be provided in a plate-like shape in which the width is greater than the thickness in the longitudinal direction D2.

[Detailed composition of tub and air flow guide]

Detailed configurations of the tub 20 and the airflow guide 87 of the dishwasher 1 according to an embodiment of the present invention will be described with reference to FIGS. 6 to 21 .

First, referring to FIG. 6 , the tub 20 forming the washing space 21 of the dishwasher 1 may be composed of a plurality of parts. Illustratively, the tub 20 may be composed of three parts. The present invention is not limited thereto, but will be described based on an embodiment in which the tub 20 is composed of three parts.

When the tub 20 is composed of three parts, the tub 20 includes an upper tub (not shown) forming an upper surface, a bottom tub 20c forming a lower surface 25 of the tub 20, A mid tub (not shown) disposed between the upper tub and the bottom tub 20c and coupled to each of them may be included.

The upper tub forming the upper surface of the tub 20 may be formed by press-processing a metal plate having predetermined heat resistance and corrosion resistance, preferably a stainless steel plate.

In this case, edges on both sides of the upper tub coupled to the mid tub and rear edges may be formed as curved surfaces having a predetermined curvature.

Like the upper tub, the bottom tub 20c forming the lower surface 25 of the tub 20 may be formed by press-working a metal plate having predetermined heat resistance and corrosion resistance, preferably a stainless steel plate.

In this case, edges on both sides and rear edges of the bottom tub 20c coupled to the mid tub may be formed as curved surfaces having a predetermined curvature. At this time, in order to effectively combine with the mid tub, the edges on both sides and the rear edge of the bottom tub 20c form part of the rear surface 23, the left side 26, and the right side 27 of the tub 20. .

In addition, a sump hole 252 for mounting the sump 41 storing washing water may be formed in the center of the bottom tub 20c, and the lower surface 25 of the bottom tub 20c has the sump hole 252. It may be provided with a convergence surface 251 having a downward gradient toward the.

A sump 41 for storing washing water and a sump cover 42 separating the sump 41 and the bottom tub 20c may be disposed in the sump hole 252 .

Meanwhile, a base 90 having a predetermined accommodation space therein may be coupled to a lower side of the bottom tub 20c.

Like the upper tub and the bottom tub 20c, the mid tub forming the both side surfaces 26 and 27 and the rear surface 23 of the tub 20 is a metal plate material having predetermined heat resistance and corrosion resistance, preferably a stainless steel plate material. It can be formed through press working.

Edges on both sides of the upper tub and rear edges may be joined to the top edge of the mid tub.

In addition, edges on both sides and a rear edge of the bottom tub 20c may be combined with a lower edge of the mid tub.

At this time, in order to prevent leakage of the washing water and ensure a strong connection to each other, the upper tub and mid tub, and the mid tub and bottom tub 20c may be welded to each other, exemplarily by seam welding.

Here, seam welding, as known in the art, is a type of electric resistance welding, which involves continuous spot welding with roller-shaped electrodes, and is a welding method mainly used for joints requiring airtightness and watertightness.

Although the tub 20 is divided into three parts, the upper tub, the mid tub, and the bottom tub 20c, when the seam welding method is used, the welding line is formed on the same plane. Therefore, the processing time required for the welding operation may have an advantage of being reduced compared to other welding methods.

Meanwhile, as shown in FIG. 6 , a lower spray arm 61 may be rotatably disposed above the sump hole 252 .

The lower spray arm 61 is rotatably disposed directly below the lower rack 51 and serves to spray washing water toward the lower rack 51 while rotating.

The lower spray arm 61 may be rotatably supported by the sump 41 , and pressurized washing water may be supplied to the lower spray arm 61 through the sump 41 .

A plurality of nozzles 611 for spraying washing water toward the lower rack 51 may be provided on the upper surface of the lower spray arm 61 .

Some of the plurality of nozzles 611 may be directional so as to spray the washing water upward toward the lower surface of the lower rack 51 .

On the other hand, as shown in FIGS. 6 to 9, the duct body 851 is formed between the lower surface 25 of the bottom tub 20c and the lower rack 51 and is close to the lower surface 25 of the bottom tub 20c. An airflow guide 87 for changing the flow direction of the dry wind airflow F supplied through may be disposed.

More specifically, the airflow guide 87 is formed near the corner formed between the left side 26 and the back side 23 of the bottom tub 20c or between the right side 27 and the back side 23 of the bottom tub 20c. It can be placed near the corner being formed. Corresponding to the position of the air flow guide 87, the drying air supply hole 253 for transferring the aforementioned drying air may be formed in the lower surface 25 of the bottom tub 20c.

6 and below, an air flow guide 87 and drying exemplarily adjacent to the lower surface 25 of the bottom tub 20c near the corner formed between the left surface 26 and the rear surface 23 of the bottom tub 20c. An embodiment in which the air supply hole 253 is disposed is shown. Although the present invention is not limited thereto, hereinafter, as shown for convenience, an air flow guide 87 and a drying air supply hole 253 are provided near the corner formed between the left side 26 and the back side 23 of the bottom tub 20c. ) will be described based on an embodiment in which is disposed.

The vicinity of the corner formed between the left surface 26 and the rear surface 23 of the bottom tub 20c corresponds to a position farthest from the top of the front surface 22 of the tub 20 that is partially opened during the drying cycle. do.

Accordingly, the time during which the drying wind blown from the air flow guide 87 remains inside the tub 20 can be effectively extended compared to the prior art. Through this, the drying air can be evenly supplied to the lower rack 51, the upper rack 52, and the top rack 53, and then discharged through the front top of the tub, so that the thermal energy of the drying wind can be effectively transferred to the object to be washed. The drying effect on the object to be washed can be remarkably improved compared to the prior art.

On the other hand, as shown in FIG. 9, the air flow guide 87 may be disposed at a position out of the rotation range R1 of the lower spray arm 61, and the rear surface 23 and lower surface 25 of the bottom tub 20c. ) and may be disposed in a spaced apart state from the left side 26.

That is, the air flow guide 87 may be disposed between a corner formed by meeting the rear surface 23, the lower surface 27, and the left surface 26 of the bottom tub 20c and the rotation range of the lower spray arm 61. there is.

In this way, since the air flow guide 87 is disposed at the corner position of the bottom tub 20c out of the rotation range R1 of the lower spray arm 61, the lower spray arm 61 rotates during the washing or rinsing stroke. interference can be effectively prevented.

In addition, since the air flow guide 87 is spaced apart from the rear surface 23, the lower surface 25, and the left surface 26 of the bottom tub 20c at a predetermined interval, the air flow guide 87 and the bottom tub 20c It is possible to effectively prevent food or the like from being caught or stuck in between.

Meanwhile, the time during which the drying wind remains inside the tub 20 may be additionally increased by adjusting the direction in which the drying wind is blown from the air flow guide 87 .

That is, the discharge port 873 of the airflow guide 87 through which the drying wind is blown is formed at a position where the blowing direction of the drying wind does not directly face the lower rack 51 and the object to be washed stored in the lower rack 51. can be configured.

More specifically, the airflow guide 87 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 in the lower rack. (51) may be configured to discharge in a direction other than directly.

To this end, the discharge port 873 through which the drying air is sprayed may be formed on the right side of the air flow guide 87 so that the drying air can be discharged in a direction substantially parallel to the rear surface 23 of the bottom tub 20c.

As exemplarily shown in FIGS. 7 and 8, the air flow guide 87 has a width in the front and rear directions (F-R direction) in the left and right directions ( Le-Ri direction) may have an outer shape formed longer than the width, and the discharge port 873 may be continuously formed over the right side and rear side facing the right side 27 of the bottom tub 20c. That is, the discharge port 873 of the air flow guide 87 may be formed to have a directivity so as not to directly face the door and not to face the front surface 22 or the door 30 of the tub 20 in a straight line.

At this time, the discharge port 873 of the airflow guide 87 may be provided in a slit or rectangular shape with a height in the vertical direction (U-D direction) smaller than a length in the front-back direction (F-R direction). In addition, the height of the discharge port 873 in the vertical direction (direction U-D) may be maintained constant while proceeding in the forward-backward direction (direction F-R) so that the drying air can be blown at the lowest possible position.

In addition, as shown, the front edge 873b of the discharge port 873 is formed on the right side of the airflow guide 87 having a flat plate shape, and the rear edge 873a extends to the rear surface of the airflow guide 87 having a curved shape. may be extended.

Therefore, the dry wind sprayed through the discharge port 873 can be discharged at the lowest possible position based on the vertical direction (U-D direction), and the rear surface 23 of the bottom tub 20c based on the horizontal direction through the slit shape. It can be sprayed with a direction that is substantially parallel to and a direction that does not face the door 30 in a straight line.

In addition, in order to improve the distribution effect of the dry wind sprayed through the discharge port 873, the discharge port 873 is provided from the bottom of the lower rack 51 between the lower rack 51 and the rear surface 23 of the bottom tub 20c. It may be configured to extend between the separation space (S) formed in.

That is, at least a part of the drying wind sprayed through the slit-shaped discharge port 873 is sprayed between the lower surface 27 of the bottom tub 20c and the lower rack 51, and the remaining part of the drying wind is separated from the space (S ) may be configured to be sprayed toward.

To this end, as shown in FIG. 8 , the airflow guide 87 may be disposed closer to the rear surface 23 of the bottom tub 20c than to the lower rack 51 . More specifically, when the rear end 511 of the lower rack 51 is spaced apart from the rear surface 23 of the bottom tub 20c by a first distance G1 while being stored in the washing space, the air flow guide 87 The rear end of ) may be spaced apart from the rear surface 23 of the bottom tub 20c to have a second distance G2 smaller than the first distance G1.

At this time, the front edge 873a of the slit-shaped discharge port 873 may be disposed below the lower rack 51, and the rear edge 873b of the discharge port 873 may be disposed in the separation space S. there is.

In other words, as shown in FIG. 8, the discharge port 873 of the air flow guide 87 is disposed in the first part 8731 disposed under the lower rack 51 and the spaced apart space S. It may be divided into two parts 8732, and a reference line dividing the first part 8731 and the second part 8732 may be the rear end 511 of the lower rack 51.

Through this, the drying wind is blown 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 F1 passing through the first part 8731 is The dry air flow F2, which rises toward the bottom surface of 51 and passes through the second part 8732, can pass through the separation space S and rise.

Accordingly, the thermal energy of the drying wind is not concentrated on a specific part of the lower rack 51 and can be evenly distributed inside the tub 20 .

A relative ratio between the first part 8731 and the second part 8732 may be set differently according to a required distribution ratio of drying air. That is, when more drying air needs to be supplied to the lower rack 51, the area ratio of the first portion 8731 is increased, and when more drying air needs to be supplied to the separation space S, the area ratio of the second portion 8731 increases. It can be configured to further increase the area ratio of (8732).

However, since the capacity of the lower rack 51 for accommodating the object to be washed is generally much larger than that of the upper rack 52 or the top rack 53, the area ratio of the first part 8731 is limited. It is preferable to set it larger than the area ratio of the 2 parts (8732).

Considering this, the area of the second part 8732 disposed in the separation space S beyond the rear end 511 of the lower rack 51 is 25 It can be set to have a ratio of % to 50%.

Meanwhile, as shown in FIGS. 7 and 8 , since the rear edge 873a of the discharge port 873 extends to the rear surface of the air flow guide 87, dry air is sprayed from the rear edge 873a side of the discharge port 873. The airflow of the wind may have a direction at least partially directed toward the rear surface 23 of the bottom tub 20c.

10 is a diagram showing temperature distributions measured in each of the top rack 53, the upper rack 52, and the lower rack 51 in a state in which dry wind is supplied through the air flow guide 87 according to the prior art, and FIG. 11 shows the temperature distribution measured in the top rack 53, the upper rack 52, and the lower rack 51, respectively, in a state in which dry air is supplied through the air flow guide 87 configured according to an embodiment of the present invention. it is a drawing

The experimental results of the comparative example according to the prior art shown in FIG. 10 and the experimental results of the experimental example according to one embodiment of the present invention shown in FIG. carried out in the same state.

As shown in FIG. 10, in the case of the prior art in which the air flow guide 87 is disposed close to the lower surface 25 of the bottom tub 20c, but the drying air is blown toward the center of the bottom tub 20c, the lower It was confirmed that the temperature deviation by position in the rack 51 did not occur significantly. (FIG. 10(a))

However, looking at the temperature deviation by position in the upper rack 52 and the top rack 53, it can be seen that the temperature rapidly decreases while moving from the center to the outside, and shows a large deviation between the center side and the outside. (FIG. 10(b), FIG. 10(c))

On the other hand, as shown in FIG. 11, the air flow guide 87 is disposed close to the lower surface 25 of the bottom tub 20c, but the drying wind is blown in a direction parallel to the rear surface 23 of the bottom tub 20c, In the case of the present invention in which the drying wind can be evenly decomposed, it was confirmed that the temperature deviation by position in the lower rack 51 does not occur significantly, as in the prior art. (FIG. 11(a))

In addition, looking at the temperature deviation by position in the upper rack 52 and the top rack 53, the temperature gradually decreases while moving from the center side to the outside, but unlike the prior art, the temperature does not decrease rapidly. It can be seen that, of course, there is no significant deviation between the center side and the outer side.

In particular, unlike the prior art, it seems that a fairly high temperature can be maintained even in the center of the top rack 53, and the tub ( 20), it can be confirmed that the temperature can be maintained evenly throughout and the drying effect on the object to be washed can be clearly improved compared to the prior art.

A detailed configuration of the airflow guide 87 of the dishwasher 1 according to an embodiment of the present invention will be described with reference to FIGS. 12 to 16 .

12 and 13, the air flow guide 87 of the dishwasher 1 according to the embodiment of the present invention is detachably coupled to the duct body 851 of the connection duct unit 85. A lower guide 871, an upper guide 872 coupled to the upper side of the lower guide 871, and a cap cover 874 disposed on the upper side of the upper guide 872 and coupled to the outer surface of the upper guide 872 It can be configured to include.

As shown, the air flow guide 87 may be configured to be divided based on the vertical direction (U-D direction), and the lower guide 871 serves to configure the lower part of the divided body. The upper part of the divided body may be configured by the upper guide 872 and the cap cover 874.

The lower guide 871 may include a guide body 8711 having an approximate plate shape.

The guide body 8711 may have an outer shape in which the 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 the guide body 8711 is installed in the connection duct unit 85.

At this time, among the outer rims forming the outer shape of the guide body 8711, the left and right rims are straight, the front rim is an arc that is convex toward the front, and the rear rim is an arc that is convex toward the rear. This can be.

The left rim and the right rim of the guide body 8711 may be formed to be substantially parallel and symmetrical to each other, and the front and rear rims of the guide body 8711 may be formed to be symmetrical to each other.

A reference surface 8711a serving as the lower edge of the discharge port 873 may be formed on the right edge side of the guide body 8711. As shown, the reference surface 8711a may be provided in the form of a flat surface, and may extend from the right edge to the lower end of a flow guide surface 8713 to be described later.

Meanwhile, on the left edge, right edge, front edge, and rear edge of the guide body 8711, first edge walls 8711b extending at least partially from the reference surface 8711a upwards (U-direction) to a predetermined height are provided. can be formed

As shown, the first rim wall 8711b may be continuously formed while advancing along the outer rim of the guide body 8711 . However, as shown in FIG. 12 , the first edge wall 8711b may not be formed at least in the area of the discharge port 873 so as not to hinder the blowing of the drying air.

As shown in FIG. 14 , the inner circumferential surface 8711b1 of the first rim wall 8711b may be configured as an inclined surface having a shape gradually widening outward while proceeding upward. By such an inclined inner circumferential surface (8711b1), the lower end (8723) of the upper guide (872) can be effectively guided to the erroneous assembly prevention groove (8711d) to be described later, through which the upper guide (872) and the lower guide ( 871) can be easily performed.

In addition, since the inner circumferential surface 8711b1 of the first rim wall 8711b is composed of an inclined surface, after the upper guide 872 and the cap cover 874 are coupled to the lower guide 871, the outer surface of the cap cover 874 and the second A gap between the inner circumferential surface 8711b1 of the first edge wall 8711b can be kept wide. Therefore, the washing water is not retained between the cap cover 874 and the lower guide 871 and can be effectively drained to the outside of the air flow guide 87 through the gap.

On the other hand, the inner side of the first rim wall 8711b is formed by being depressed lower in the vertical direction (U-D direction) than the reference surface 8711a in the downward direction (D-direction), preventing misassembly of the upper guide 872. An erroneous assembly prevention groove 8711d serving as a portion may be formed. In this case, the height at which the misassembly prevention groove 8711d is recessed from the reference surface 8711a may be maintained substantially constant while advancing along the first edge wall 8711b.

A lower end 8723 of an upper guide 872 to be described later may be inserted into and coupled to the erroneous assembly prevention groove 8711d. Accordingly, the erroneous assembly prevention groove 8711d may be formed to have a shape and size corresponding to the shape and size of the lower end 8723 of the upper guide 872. As will be described later, the shape of the lower end 8723 of the upper guide 872 is continuous except for the area where the first notch hole 8724 forming the discharge port 873 is formed, that is, the area where the reference surface 8711a is formed. Accordingly, the erroneous assembly prevention groove 8711d may be continuously formed along the first edge wall 8711b.

At this time, the shape of the lower end 8723 of the upper guide 872 and the shape of the erroneous assembly prevention groove 8711d may be configured to have an asymmetrical shape based on the front-back direction (F-R direction). Therefore, the lower end 8723 of the upper guide 872 can be configured so that it is not coupled and fastened in a direction other than the direction previously set in the erroneous assembly prevention groove 8711d, and through this, the upper guide 872 and the lower guide Misassembly between 871 can be effectively prevented. A coupling structure between the upper guide 872 and the lower guide 871 and a structure for preventing misassembly will be described later with reference to FIGS. 17 to 19 .

Meanwhile, a second rim wall 8711c may be formed on the front rim of the guide body 8711 to extend from the reference surface 8711a in a downward direction (D-direction) with a predetermined height.

As shown, the second rim wall 8711c may be continuously formed to have a cylindrical shape while advancing along the arc-shaped front rim of the guide body 8711, and the lower end of the second rim wall 8711c will be described later. It may extend to the position of the lower end (8712b) of the duct coupling part (8712) to be used.

That is, the second frame wall 8711c may be formed in a form that at least partially surrounds an outer surface of a duct coupling part 8712 to be described later. At this time, the second rim wall 8711c is formed in a state of being separated from and spaced apart from the duct coupling portion 8712, and a predetermined separation space is formed between the second rim wall 8711c and the duct coupling portion 8712. can As will be described later, an upper end 8522 of the fastening nut 852 may be inserted into the spaced space.

On the second rim wall 8711c, an anti-loosening portion 8711e that maintains the lower guide 871 as a fixed object through interaction with the fastening nut 852 and prevents the lower guide 871 from being separated from the fixed position may be provided.

As will be described later, the lower guide 871 is detachably coupled to the duct body 851 of the connecting duct unit 85 through a two-step coupling operation without a separate coupling member. Preferably, the two-step coupling operation may include a vertical movement operation in a vertical direction and a rotational movement operation in a circumferential direction.

The loosening prevention unit 8711e causes the lower guide 871 to relatively rotate in the opposite direction to the rotational movement of the two-step coupling operation after the two-stage coupling operation including the vertical movement operation and the rotational movement operation is completed, that is, the lower guide 871 plays a role in preventing departure from the fixed position.

The loosening prevention unit 8711e may be integrally formed with the second rim wall 8711c as illustrated, and the lower guide 871 moves in the opposite direction to the rotational movement of the two-step coupling operation in the form of an elastic hook. It can be configured to block relative rotation.

The fastening nut 852 may be provided with a plurality of stoppers 8521 interacting with the anti-loosening portion 8711e. Detailed configurations of the anti-loosening portion 8711e and the plurality of stoppers 8521 of the fastening nut 852 will be described later with reference to FIGS. 23 and 24 .

Meanwhile, as described above, the lower guide 871 is configured to be directly coupled to the duct body 851 of the connection duct unit 85 in a pipe coupling method.

To this end, the lower guide 871 may include a cylindrical duct coupling part 8712 to 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 part 8712 may be provided in a cylindrical shape in which the central axis C extends in parallel in the vertical direction (U-D direction). The inner diameter of the lower end 8712b of the duct coupling part 8712 should be greater 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 the inside. can

The duct coupling part 8712 may be integrally formed with the guide body 8711, and preferably may be disposed close to the arcuate rear rim of the guide body 8711. That is, the duct coupling part 8712 may be disposed in a state biased towards the rear side of the guide body 8711 based on the front-back direction (F-R direction).

An upper end 8712a of the cylindrical duct coupling part 8712 through which dry air is discharged may be formed at a position protruding upward (U-direction) from the guide body 8711. Preferably, the upper end 8712a of the duct coupling part 8712 protrudes and is exposed into the internal flow space formed between the guide body 8711 of the lower guide 871 and the upper guide 872.

As will be described later, the position (P2) of the upper end (8712a) of the duct coupling part (8712) through which the dry air passes is higher and lower than the position (P1) of the upper edge of the first notch hole (8724) forming the discharge port (873). It may be formed at a higher position based on the direction (U-D direction).

In addition, the central axis C of the duct coupling part 8712 is located more rearward than the first notch hole 8724 based on the front-back direction (F-R direction). Through this, it is possible to minimize the inflow of washing water introduced from the outlet 873 into the inside of the duct coupling portion 8712 through the upper end 8712a of the duct coupling portion 8712.

The lower end 8712b of the cylindrical duct coupling part 8712 may be formed at a position protruding downward from the guide body 8711 (D-direction). Preferably, the lower end 8712b of the duct coupling part 8712 into which the upper end 8511 of the duct body 851 is inserted may extend toward the lower surface 25 of the bottom tub 20c, and the air flow guide 87 may be configured to be close to or in contact with the lower surface 25 of the bottom tub 20c based on the state in which the connecting duct unit 85 is installed.

Meanwhile, on the inner circumferential surface 8712c of the duct coupling part 8712, a first guide groove 8712d extending linearly along the vertical direction (U-D direction) and a second guide groove 8712e extending in an arc shape along the circumferential direction ) can be formed.

As shown, the upper end of the first guide groove 8712d and one end of the second guide groove 8712e are integrally connected.

As described above, the lower guide 871 is coupled to the duct body 851 of the connecting duct unit 85 through a two-step coupling operation including a vertical movement operation in the vertical direction and a rotation operation in the circumferential direction.

The first guide groove 8712d extending in a straight line along the vertical direction (U-D direction) serves to guide the vertical movement of the lower guide 871 in the vertical direction, and the second guide groove 8712d extends in an arc shape along the circumferential direction. The guide groove 8712e serves to guide rotational movement of the lower guide 871 in the circumferential direction.

The outer circumferential surface of the duct body 851 inserted and coupled to the duct coupling part 8712 of the lower guide 871 protrudes toward the inner circumferential surface of the connecting duct part 85, and the first guide of the connecting duct part 85 The guide protrusion 8516 inserted into the groove 8712d and the second guide groove 8712e may be integrally provided.

Therefore, as will be described later, when the lower guide 871 and the duct body 851 are coupled, the guide protrusion 8516 may first be inserted into the first guide groove 8712d.

Therefore, in a state where the guide protrusion 8516 of the duct body 851 is inserted into the first guide groove 8712d, the lower guide 871 can move vertically in the downward direction (D-direction).

When the vertical movement operation in the up-and-down direction is started during the second-stage coupling operation, the first guide groove 8712d moves in the downward direction (D-direction) along the guide protrusion 8516 in a stationary state. When the guide protrusion 8516 reaches the upper end of the first guide groove 8712d, the lower guide 871 cannot move further in the downward direction (D-direction) due to the action of the guide protrusion 8516. .

At this time, since the guide protrusion 8516 reaches one end of the second guide groove 8712e, the lower guide 871 cannot be moved in the downward direction (D-direction), but during the second-step coupling operation Circumferential rotation movement operation becomes possible.

When the lower guide 871 is rotated for a circumferential rotational movement operation during the second-stage coupling operation, the second guide groove 8712e moves along the guide protrusion 8516 in a stationary state. When the guide protrusion 8516 reaches the other end of the second guide groove 8712e, the lower guide 871 cannot further rotate in the circumferential direction due to the action of the guide protrusion 8516.

In this way, when the rotation is no longer possible, the coupling between the lower guide 871 and the duct body 851 is completed, and the arrangement of the lower guide 871 in a fixed position can be completed, and a separate coupling member or The coupling between the lower guide 871 and the duct body 851 may be performed without a fastening member.

On the other hand, as shown in FIG. 12, the other end side of the second guide groove 8712e forms a sense for movement of the guide protrusion 8516, and the guide protrusion 8516 extends to the other end of the second guide groove 8712e. After reaching , a stopper protrusion 8712f for preventing relative rotation of the lower guide 871 in the opposite direction may be integrally formed on the inner circumferential surface 8712c of the duct coupling part 8712.

Accordingly, the guide protrusion 8516 may be prevented from being separated from the other end of the second guide groove 8712e through the stopper protrusion 8712f unless an external force exceeding a certain level acts.

Meanwhile, at least one upper guide locking protrusion 8712g for mutual fastening between the upper guide 872 and the lower guide 871 described below may be integrally formed on the outer circumferential surface of the duct coupling part 8712.

As will be described later, the upper guide 872 is coupled to the upper side of the lower guide 871.

Therefore, at least one upper guide locking protrusion 8712g is formed on the outer circumferential surface of the duct coupling part 8712 so that the upper guide 872 is easily coupled through downward movement but not easily separated through upward movement. It may be configured to have a ramp surface having a predetermined inclination angle and a stepped surface formed substantially perpendicular to the outer circumferential surface of the duct coupler 8712.

As will be described later, the upper guide 872 is formed adjacent to the lower end 8723 and may include a first locking hole 8725 formed through the inside and outside of the upper guide 872 .

When the upper guide 872 and the lower guide 871 are coupled, the first catching hole 8725 may be provided in the form of a square through hole having a width and a height into which the upper guide catching protrusion 8712g can be inserted.

Meanwhile, a flow guide surface 8713 may be formed on the front side of the duct coupling part 8712 to guide the dry wind air flow F passing through the upper end 8712a of the duct coupling part 8712 toward the discharge port 873. there is.

As shown in FIG. 12, the upper end of the flow guide surface 8713 is formed to have approximately the same height as the upper end 8712a of the duct coupling part 8712, and the lower end of the flow guide surface 8713 reaches the reference surface 8711a. is extended

A curved surface or an inclined surface may be continuously formed between the upper and lower ends of the flow guide surface 8713 to minimize the flow loss of the dry wind airflow and minimize the amount of flow noise.

At this time, the rear side of the flow guide surface 8713 extends to contact the inner surface of the second curved portion 8722b constituting the rear surface of the upper guide 872, which will be described later, and corresponds to the shape of the rear surface of the upper guide 872. It may be configured in the form of a curved surface to have a shape to do.

The front side of the flow guide surface 8713 may extend to the outer circumferential surface of the duct coupling part 8712. Preferably, the front side of the flow guide surface 8713 may be integrally connected to the outer circumferential surface of the duct coupling part 8712.

In this way, since the lower guide 871 is integrally formed with rather complex shapes to perform multiple functions, it can be manufactured by plastic injection molding in consideration of these shapes.

On the other hand, the upper guide 872 is coupled to the upper side of the lower guide 871 and serves to form a closed internal flow space in the form of a channel in which the dry air flow F flows inside together with the lower guide 871 .

As shown, to form an internal flow space, the upper guide 872 may be formed to have a container shape with an empty space formed therein and an open lower surface as a whole.

The open lower surface of the upper guide 872 can be closed as a whole by combining the guide body 8711 of the lower guide 871, through which the closed internal flow space between the upper guide 872 and the lower guide 871 can be formed.

At this time, corresponding to the shape of the guide body 8711 of the lower guide 871, the outer shape of the upper guide 872 may be formed with a width in the front-rear direction larger than that in the left-right direction.

The upper guide 872 includes an upper surface 8721 formed substantially parallel to the reference surface 8711a of the lower guide 871, and an outer wall extending downward (D-direction) along the circumference of the upper surface 8721 It is possible to construct a container shape with an open lower surface through the surface.

At this time, the top surface 8721 and the outer wall surface may be integrally formed, and may be formed to have a substantially uniform thickness in order to maximize the internal flow space, and may be preferably manufactured through plastic injection molding.

The outer wall surface may include a first flat portion 8722c forming the right side and having a flat plate shape, and a second flat portion 8722d forming the left side and having a flat plate shape. The first planar portion 8722c and the second planar portion 8722d may be formed to be symmetrical to each other, and may be vertical surfaces or inclined surfaces having a gradient in which the distance between them gradually decreases as they move upward (U-direction). This can be.

In addition, the first curved portion 8722a may be continuously formed on the front side of the first flat portion 8722c and the second flat portion 8722d, and the first flat portion 8722c and the second flat portion 8722d may be formed. A second curved portion 8722b may be continuously formed on the rear side of the .

The first curved portion 8722a forms the front surface of the upper guide 872, and may exemplarily have a semi-cylindrical shape convex forward.

Similar to the first curved portion 8722a, the second curved portion 8722b forms the rear surface of the upper guide 872, and may exemplarily have a semi-cylindrical shape convex toward the rear.

The first curved portion 8722a and the second curved portion 8722b may be disposed to have substantially symmetrical shapes.

The first curved portion 8722a and the second curved portion 8722b may be integrally formed on the top surface 8721, the first flat portion 8722c, and the second flat portion 8722d, respectively, and the top surface 8721 ), a continuous surface may be formed for the first flat portion 8722c and the second flat portion 8722d.

Meanwhile, as shown, a chamfered first camper surface 8722e may be formed at a corner formed between the top surface 8721 and the outer wall surface. Through the first camper surface 8722e, it is possible to minimize flow loss or noise due to vortexes that may occur at the angled corners of the internal flow space through which the dry air flow flows.

The first camper surface 8722e may be a curved surface having a predetermined curvature or an inclined surface having a predetermined slope.

For the same reason as the first camper surface 8722e, the corner formed when the top surface 8721 and the first curved portion 8722a meet and the corner formed when the top surface 8721 and the second curved portion 8722b meet A chamfered second camper surface 8722f may be formed.

Similar to the first camper surface 8722e, the second camper surface 8722f may be a curved surface having a predetermined curvature or an inclined surface having a predetermined slope.

However, as will be described later, the corner generated by the meeting of the upper surface 8721 and the first curved portion 8722a and the corner generated by the meeting of the upper surface 8721 and the second curved portion 8722b are dry wind airflow (F ) has a directionality approximately perpendicular to the flow direction.

Therefore, the flow loss due to the vortex is greater than the corner formed by the meeting of the top surface 8721 and the first flat part 8722c and the corner created by the meeting of the top surface 8721 and the second flat part 8722d. corresponds to the part of

In order to minimize flow loss due to the vortex, the second camper surface 8722f may be formed to have a much larger chamfer dimension than the first camper surface 8722e.

The lower end 8723 of the upper guide 872 formed around the lower surface of the open surface is formed in the upper and lower directions (U-D direction), it may be continuously formed in a state in which the height is maintained constant.

However, as described above, the first notch hole 8724 forming the front edge, the rear edge, and the top edge of the discharge port 873 may be formed at the lower end 8723 of the upper guide 872 .

As shown, the first notch hole 8724 may be provided in a notch shape obtained by partially cutting the first flat portion 8722c and the second curved portion 8722b of the upper guide 872.

The lower end of the first notch hole 8724 is entirely open, and when the upper guide 872 is coupled to the lower guide 871, the reference surface 8711a of the lower guide 871 described above becomes the first notch hole 8724 ), and the lower end of the first notch hole 8724 is blocked by the reference surface 8711a.

The upper edge of the first notch hole 8724 may extend substantially parallel to the reference surface 8711a of the lower guide 871 or may extend linearly.

A rear edge of the first notch hole 8724 is formed on the first planar portion 8722c and may extend linearly in a vertical direction (U-D direction). A front edge of the first notch hole 8724 is formed on the second curved portion 8722b and may extend linearly in a vertical direction (U-D direction).

A curved edge having a predetermined curvature may be formed in each of the rear corner portion formed by meeting the top edge and the rear edge and the front corner portion formed by meeting the top edge and the front edge.

Meanwhile, in the first curved portion 8722a of the upper guide 872, there is a first catching hole 8725 in the form of a square through hole into which the upper guide catching protrusion 8712g of the lower guide 871 is engaged. It may be formed at a position adjacent to the lower end 8723 of 872.

As shown in FIG. 12, the outer shape of the upper guide 872 has a substantially symmetrical shape with respect to the front-back direction (F-R direction), but the first notch hole 8724 and the first locking hole 8725 are in the front-back direction. It is formed in an asymmetrical position with respect to (F-R direction). Therefore, the first notch hole 8724 and the first locking hole 8725 act as a means for preventing mis-assembly of the upper guide 872 with respect to the lower guide 871 as will be described later.

Meanwhile, at least one cap cover locking protrusion 8726 for fastening a cap cover 874 to be described below may be integrally formed on the second flat portion 8722d of the upper guide 872.

As will be described later, a cap cover 874 may be coupled to an outer surface of the upper guide 872 .

Similar to the aforementioned upper guide holding protrusion 8712g, at least one cap cover holding protrusion 8726 has a predetermined inclination angle with respect to the second plane portion 8722d so that coupling is easily performed but separation is not easily performed. It may be configured to have a ramp surface having, and a stepped surface formed substantially perpendicular to the second plane portion.

However, in order to prevent erroneous assembly of the cap cover 874, the cap cover locking protrusion 8726 may be formed at a higher position in the vertical direction than the aforementioned upper guide locking protrusion 8712g.

As will be described later, the cap cover 874 is formed adjacent to the lower end 8743 and may include a second locking hole 8745 formed through the inside and outside of the cap cover 874 .

The second locking hole 8745 may be provided in the form of a square through hole having a width and a height into which the cap cover locking protrusion 8726 can be inserted when the upper guide 872 and the cap cover 874 are coupled. Like the cover locking projection 8726, it may be formed at a higher position in the vertical direction than the upper guide locking projection 8712g.

Through this, since the cap cover locking projection 8726 and the second locking hole 8745 can be clearly distinguished from the upper guide locking projection 8712g through a difference in height, the cap has a symmetrical shape with respect to the front and rear directions (F-R direction). Misassembly of the cover 874 can be effectively prevented.

Meanwhile, the upper guide 872 of the air flow guide 87 according to an embodiment of the present invention is a means for minimizing reverse inflow of washing water into the air flow guide 87 through the outlet 873. A blocking rib 8728 may be provided.

As shown in FIGS. 14 and 15 , the blocking rib 8728 may include a first rib 8728a extending along the top edge, front edge, and rear edge of the first notch hole 8724 in the form of a sunshade. there is.

The first rib 8728a continuously extends along the edge of the first notch hole 8724 and may protrude in a direction substantially perpendicular to the outer wall surface of the upper guide 872 . Preferably, the first rib 8728a may be integrally formed on the outer wall surface of the upper guide 872.

One end of the first rib 8728a may be formed at the rear edge of the first notch hole 8724, and the other end of the first rib 8728a may be formed at the front edge of the first notch hole 8724. . The first rib 8728a may extend in the form of a continuous protruding wall between one end and the other end so as to serve as a shield substantially surrounding the first notch hole 8724 as a whole.

However, in order to prevent interference with the first rim wall 8711b of the lower guide 871, one end and the other end of the first rib 8728a are respectively moved upward from the lower end 8723 of the upper guide 872. (U-direction) may be formed at positions spaced apart at a predetermined height.

The first rib 8728a performs a function of minimizing the passage of washing water falling from or splashing from the storage unit after washing the object to be washed through the first notch hole 8724 .

To this end, as shown in FIG. 14, the horizontal rib formed at least on the upper edge of the first notch hole 8724 among the first ribs 8728a is the first edge wall 8711b of the lower guide 871 and the reference surface ( 8711a) may be configured to protrude beyond.

That is, the horizontal portion of the first rib 8728a may extend to a position covering the first rim wall 8711b and the reference surface 8711a based on the vertical direction (U-D direction), and installation of the air flow guide 87 is required. When viewed from above in the completed state, the first rim wall 8711b and the reference surface 8711a are hidden by the first rib 8728a and are not visible.

Therefore, after washing the object to be washed, a phenomenon in which the washing water falling in the vertical direction collides with the first edge wall 8711b and then scatters and flows into the first notch hole 8724 can be minimized.

However, washing water scattered during the washing or rinsing process inevitably falls in a direction other than the vertical direction. That is, it cannot be ruled out that washing water splashed by avoiding the first rib 8728a and colliding with the first edge wall 8711b flows into the first notch hole 8724.

In order to prevent this phenomenon, the blocking rib 8728 may further include at least one second rib 8728b extending across the inside of the first notch hole 8724 along the front-back direction (F-R direction). .

12 to 14 illustratively shows an embodiment provided with a pair of second ribs 8728b spaced apart in the vertical direction (U-D direction). Although the present invention is not limited thereto, hereinafter, for convenience, an embodiment in which a pair of second ribs 8728b is provided will be described.

The pair of second ribs 8728b may extend across the inside of the first notch hole 8724 and may have the same shape as each other.

At this time, in order to prevent deterioration in spraying efficiency of the sprayed dry wind, the thickness of each second rib 8728b in the vertical direction may be much smaller than the length in the longitudinal direction.

However, the rear end of each second rib 8728b is at the rear edge of the first notch hole 8724 so as to entirely cover the inside of the first notch hole 8724 in the front-back direction (F-R direction). The front end of the second rib 8728b may be connected to the front edge of the first notch hole 8724.

Through this shape of the second rib 8728b, even if the washing water avoids the first rib 8728a and collides with the first rim wall 8711b and is scattered, it collides with the second rib 8728b again. inflow can be blocked.

At this time, the shape of the cross section of each second rib 8728b can be maintained constant while progressing from the front end toward the rear end.

Preferably, the shape of the cross section of each second rib 8728b may be configured such that the vertical width of the cross section is gradually reduced while moving from the inside of the upper guide 872 to the outside, as shown in FIG. .

That is, the distance between the pair of second ribs 8728b and the distance between the pair of second ribs 8728b and the upper edge of the first notch hole 8724 gradually increases as it progresses to the outside of the upper guide 872. It expands. Therefore, the possibility that foreign matter such as food generated during the washing or rinsing operation is adhered to the first notch hole 8724 or introduced through the first notch hole 8724 can be minimized.

Meanwhile, since the pair of second ribs 8728b have a relatively small thickness compared to the longitudinal length, they have relatively low strength and may be damaged by a small external force. In order to prevent such breakage, it may be reinforced by a bridge rib 8728c disposed between the front end and the rear end of the second rib 8728b and connecting the pair of second ribs 8728b to each other. In the illustrated embodiment, the bridge rib 8728c is shown as extending only between the pair of second ribs 8728b, but additionally, the bridge rib 8728c extends to the top edge of the first notch hole 8724 It is also possible to do

Meanwhile, the cap cover 874 disposed above the upper guide 872 serves to protect the upper guide 872 by being coupled to the outer surface of the upper guide 872 .

The upper guide 872 is disposed at a position lower than the storage unit in which the object to be washed is accommodated, and is disposed so that most of the top surface 8721 and the outer wall surface are exposed to the washing space 21 of the tub 20 . However, as described above, the upper guide 872 is made of a plastic material that may have insufficient strength.

Therefore, there is a high possibility that the upper guide 872 is directly damaged by a collision between an object to be washed that may fall from the storage unit during the washing or rinsing operation or when the user withdraws the storage unit.

The cap cover 874 is coupled to the upper outer surface of the upper guide 872 to prevent the upper guide 872 from being damaged due to a collision with an object to be cleaned.

To this end, the cap cover 874 may be formed of a material having higher breaking strength and corrosion resistance than the upper guide 872, and preferably may be formed through a metal plate material such as stainless steel.

The cap cover 874 may have a shape corresponding to the shape of the outer surface of the upper guide 872 so as to be coupled to the outer surface of the upper guide 872 .

Therefore, similar to the upper guide 872, the cap cover 874 has an empty space formed therein and has a container shape with a lower surface entirely open.

The upper guide 872 may be inserted and coupled through the open lower surface of the cap cover 874 .

Corresponding to the shape of the upper guide 872, the outer shape of the cap cover 874 may be formed with a width in the front-back direction larger than that in the left-right direction.

More specifically, the cap cover 874 extends in the lower direction (D-direction) along the upper surface 8741 formed parallel to the upper surface 8721 of the upper guide 872 and along the circumference of the upper surface 8721. It may include an outer wall surface to be.

Similar to the upper guide 872, the outer wall surface of the cap cover 874 includes a first flat portion 8742c forming the right side and being in the form of a flat plate, and a second flat portion forming the left side and being in the form of a flat plate ( 8742d).

The first flat portion 8742c and the second flat portion 8742d may be formed in a form symmetrical to each other, and may be a vertical surface or an inclined surface having a gradient in which the distance between each other gradually decreases as it proceeds in the upward direction (U-direction). It can be.

In addition, the first curved portion 8742a may be formed on the front side of the first flat portion 8742c and the second flat portion 8742d, and the rear side of the first flat portion 8742c and the second flat portion 8742d. A second curved portion 8742b may be continuously formed on the side.

The first curved portion 8742a forms the front surface of the cap cover 874 and has a semi-cylindrical shape convex forward corresponding to the shape of the first curved portion 8722a of the upper guide 872.

The second curved portion 8742b forms the rear surface of the cap cover 874 and has a semi-cylindrical shape convex forward corresponding to the shape of the second curved portion 8722b of the upper guide 872.

The first curved portion 8742a and the second curved portion 8742b may be integrally formed on the top surface 8741, the first flat portion 8742c, and the second flat portion 8742d, respectively, and the top surface 8741 ), a continuous surface may be formed for the first flat portion 8742c and the second flat portion 8742d.

In addition, a chamfered camper surface 8742e may be formed at a corner formed between the upper end surface 8741 and the outer wall surface corresponding to the upper guide 872 .

However, unlike the upper guide 872, a configuration corresponding to the second camper surface 8722f of the upper guide 872 is not provided.

The lower end 8743 of the outer wall of the cap cover 874 may extend to the lower end 8723 of the outer wall of the upper guide 872 so as to cover the entire outer wall of the upper guide 872 . Therefore, when coupled to the lower guide 871, the lower end 8743 of the cap cover 874 and the lower end 8723 of the upper guide 872 can be inserted into the erroneous assembly prevention groove 8711d of the lower guide 871. there is.

Meanwhile, a second notch hole 8744 having a shape corresponding to the first notch hole 8724 of the upper guide 872 may be formed at the lower end 8743 of the cap cover 874 .

Like the first notch hole 8724, the second notch hole 8744 may be provided in a notch shape partially cut out of the first flat portion 8742c and the second curved portion 8742b of the cap cover 874. there is.

Since the specific shape of the second notch hole 8744 may be identical to that of the first notch hole 8724, a description of overlapping details will be omitted.

However, a locking step 8744a protruding into the second notch hole 8744 may be provided at the lower end of the front edge of the second notch hole 8744 .

The locking jaw 8744a is a portion that is engaged with the other end of the aforementioned first rib 8728a, and the right portion of the cap cover 874 can be coupled to the upper guide 872 through the locking jaw 8744a. .

On the other hand, the second flat part 8742d of the cap cover 874 has a second locking hole 8745 in the form of a square through hole into which the cap cover locking protrusion 8726 of the upper guide 872 is engaged. It may be formed at a position adjacent to the lower end 8723 of 872.

When the cap cover locking protrusion 8726 is engaged with the second locking hole 8745, the left portion of the cap cover 874 may be coupled to the upper guide 872.

That is, the cap cover 874 may be configured to be fastened to the upper guide 872 at least at two locations through the locking jaw 8744a and the cap cover locking protrusion 8726.

Referring to FIGS. 15 and 16, the washing water reverse inflow prevention means of the air flow guide 87 according to an embodiment of the present invention will be described in detail.

As described above, the discharge port 873 of the air flow guide 87 that blows dry 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 cycle or the rinsing cycle, there is a high possibility that the washing water will flow backward into the internal flow space of the air flow guide 87 through the outlet 873. The possibility that the reverse flowed washing water passes through the duct coupling part 8712 provided in the internal flow space of the air flow guide 87 and flows into the drying air supply unit 80 cannot be ruled out.

In order to prevent such a reverse inflow of washing water, the airflow guide 87 according to an embodiment of the present invention is provided with a means for preventing reverse inflow of washing water.

First, the position (P2) of the upper end (8712a) of the duct coupling part (8712) exposed to the internal flow space and through which the dry wind passes is the position (P1) of the upper edge of the first notch hole (8724) forming the discharge port (873) ) may be formed at a higher position relative to the vertical direction (U-D direction).

Therefore, even if the washing water passes through the discharge port 873 and enters the internal flow space, the possibility of reaching the upper end 8712a of the duct coupling part 8712 formed at a higher position in the gravity direction is reduced.

In addition, as shown in FIG. 16, the central axis C of the duct coupling part 8712 is located more forward than the first notch hole 8724 in the front-back direction (F-R direction).

That is, at least the front edge of the first notch hole 8724 is located more rearward than the central axis C of the duct coupling part 8712. Therefore, the portion where the upper end 8712a of the duct coupling part 8712 is exposed to the outside through the discharge port 873 or the first notch hole 8724 can be minimized, and the reverse inflow washing water passing through the discharge port 873 Entry into the inside of the duct coupling portion 8712 through the upper end 8712a of the coupling portion 8712 can be minimized.

In addition, in the internal flow space of the air flow guide 87, the upper end extends to approximately the same height as the upper end 8712a of the duct coupling part 8712, and the lower end extends to the reference surface 8711a of the lower guide 871. A flow guide surface 8713 extending in a shape may be provided.

Through the configuration of the flow guide surface 8713, the reverse inflow washing water passing through the discharge port 873 or the first notch hole 8724 stays inside the air flow guide 87 or the top of the duct coupling part 8712. It cannot move toward 8712a and can be discharged again to the bottom tub 20c through the discharge port 873 or the first notch hole 8724 by gravity.

In addition, a first rib 8728a extending in the form of a sunshade is provided on the upper edge, the front edge, and the rear edge of the first notch hole 8724, and inside the first notch hole 8724 in the forward and backward directions (F-R direction). At least one second rib 8728b extending across the first notch hole 8724 may be provided.

Through this, the amount of reverse inflow washing water flowing directly through the outlet 873 or the first notch hole 8724 can be minimized.

In addition, as shown in FIG. 15, the position P1 of the upper edge of the discharge port 873 or the first notch hole 8724 is the position of the plurality of nozzles 611 provided on the upper surface of the lower spray arm 61 ( P3) may be formed at a lower position relative to the vertical direction (U-D direction).

A plurality of nozzles 611 provided on the lower spray arm 61 are provided to spray washing water in an upward direction (U-direction) toward the lower rack 51 disposed above the lower spray arm 61 .

Therefore, by forming the discharge port 873 or the first notch hole 8724 at a lower position than the plurality of nozzles 611, the washing water directly passes through the plurality of nozzles 611 through the discharge port 873 or the first notch hole 8724. ), and the possibility of reverse inflow of washing water can be minimized.

Referring to FIGS. 17 to 19 , an erroneous assembly prevention unit between the lower guide 871 and the upper guide 872 of the air flow guide 87 according to an embodiment of the present invention will be described in detail.

First, referring to FIGS. 17 and 18, a state in which the upper guide 872 is assembled to the lower guide 871 in a preset position rather than incorrectly assembled is shown. For convenience, the configuration of the cap cover 874 is is omitted.

As described above, the upper guide 872 and the lower guide 871 have left and right symmetrical shapes with respect to the front-rear direction (F-R direction). Therefore, if there is no separate erroneous assembly prevention unit, the upper guide 872 has a structure capable of being coupled to the guide body 8711 of the lower guide 871 in a state where the front and rear sides are reversed.

In order to prevent erroneous assembly in which the front and rear are reversed, the shape of the lower end of the upper guide 872 and the erroneous assembly prevention groove formed in the guide body 8711 of the lower guide 871 coupled thereto 8711d) has an asymmetrical shape based on the front-back direction (F-R direction).

As described above, the asymmetrical shape of the lower end of the upper guide 872 can be realized by the location where the first notch hole 8724 is formed and the shape of the first notch hole 8724, and the lower guide 871 The asymmetrical shape of the erroneous assembly prevention groove 8711d can be realized by the reference surface 8711a formed on the guide body 8711 and on which the erroneous assembly prevention groove 8711d is not formed.

Furthermore, the upper guide locking protrusion 8712g and the first locking hole 8725 serving to fix the upper guide 872 to the lower guide 871 may be asymmetrically disposed with respect to the front-rear direction (F-R direction). .

Therefore, as shown in FIGS. 17 and 18, when the upper guide 872 is moved in the lower direction (D-direction) toward the lower guide 871 for coupling in a state arranged in a preset position, the upper guide ( The lower end of 872) is able to enter the inside of the erroneous assembly prevention groove 8711d having a corresponding shape.

Similarly, the first locking hole 8725 of the upper guide 872 may be inserted into and engaged with the corresponding upper guide locking protrusion 8712g. Through this, the upper guide 872 can be fixed to the lower guide 871 in a state of being arranged in a preset position.

However, as shown in FIG. 19, when trying to couple the upper guide 872 with the front and back sides reversed, the lower end 8723 of the upper guide 872 and the erroneous assembly prevention groove 8711d are based on the preset position. As a result, they are misaligned by 180 degrees.

For this reason, the lower end 8723 of the upper guide 872 is caught by the reference surface 8711a formed at a higher position in the vertical direction (U-D direction) than the misassembly prevention groove 8711d, and the lower end of the upper guide 872 8723 is in a state in which it cannot enter or be inserted into the erroneous assembly prevention groove 8711d.

In addition, since the first locking hole 8725 of the upper guide 872 is arranged at a position rotated by 180 degrees with respect to the upper guide locking protrusion 8712g, the first locking hole 8725 is attached to the upper guide locking protrusion 8712g. It becomes impossible to connect. Therefore, since the upper guide 872 cannot be fixed to the lower guide 871, it can be intuitively confirmed during the assembly process that the upper guide 872 is not arranged in a preset position. Through this, misassembly between the upper guide 872 and the lower guide 871 can be effectively prevented.

Hereinafter, a process of assembling and fixing the airflow guide 87 to the connection duct unit 85 according to an embodiment of the present invention will be described with reference to FIGS. 20 to 22 .

As described above, the lower guide 871 is coupled to the duct body 851 of the connection duct unit 85 through a two-step coupling operation. Preferably, the two-step coupling operation may include a simple vertical movement operation in the vertical direction and a simple rotation movement operation in the circumferential direction.

For vertical movement operation in the vertical direction, as shown in FIG. It may be arranged to be disposed on the upper side of the duct body 851.

At this time, the duct body 851 and the duct coupling portion 8712 are moved up and down so that the upper end 8511 of the duct body 851 can be inserted into the lower end 8712b of the duct coupling portion 8712 of the lower guide 871. The central axis may be aligned in the direction (U-D direction).

In addition, the air flow guide 87 may be rotated in a predetermined angular range from a fixed position around the duct coupling part 8712. The position where the air flow guide 87 is rotated in this way becomes a position where the guide protrusion 8516 formed on the outer circumferential surface of the duct body 851 can be inserted into the first guide groove 8712d of the duct coupling part 8712.

20 (a) shows a state in which the air flow guide 87 is rotated clockwise in a predetermined angular range based on the drawing, but this is only exemplary and the air flow guide 87 is rotated counterclockwise. Modifications in which binding is initiated in the state are also applicable. The present invention is not limited thereto, but will be described based on an embodiment in which coupling is initiated in a state in which the air flow guide 87 is rotated in a clockwise direction, as shown by way of example.

As shown, when the alignment of the air flow guide 87 with respect to the duct body 851 is completed, first, the air flow guide 87 is moved vertically downward (D-direction) in the direction of the arrow shown in FIG. 20 (b). By moving, the upper end 8511 of the duct body 851 is inserted into the lower end 8712b of the duct coupling part 8712, and accordingly, the guide protrusion of the duct body 851 is at the lower end of the first guide groove 8712d. can be inserted.

In this way, when the air flow guide 87 is vertically moved in the downward direction (D-direction) in a state in which the guide protrusion of the duct body 851 is inserted into the lower end of the first guide groove 8712d, the air flow guide 87 moves in the vertical direction. The vertical movement operation is started.

Accordingly, the movement of the first guide groove 8712d of the duct coupling part 8712 is guided by the guide protrusion in a stationary state and moves vertically in the downward direction (D-direction).

On the other hand, as shown in FIG. 21, when the guide protrusion reaches the upper end of the first guide groove 8712d, the air flow guide 87 can no longer move vertically in the downward direction (D-direction) by the action of the guide protrusion. it becomes impossible

At this time, since the guide protrusion reaches one end of the second guide groove 8712e, the air flow guide 87 cannot move vertically in the downward direction (D-direction), but in FIG. 21 (a) Rotational movement in the circumferential direction along the direction of the arrow shown is possible.

When the air flow guide 87 is rotated counterclockwise along the direction of the arrow for the circumferential rotational movement operation during the second-stage coupling operation, the second guide groove 8712e rotates counterclockwise along the guide protrusion in a stationary state. can be initiated.

When the airflow guide 87 rotates counterclockwise, the guide protrusion reaches the stopper protrusion 8712f disposed adjacent to the other end of the second guide groove 8712e.

At this time, the stopper protrusion 8712f can form a feeling of jamming with respect to the rotation of the air flow guide 87, and when an additional rotational force is applied, the guide protrusion can ride over the stopper protrusion 8712f.

Then, when the guide protrusion reaches the other end of the second guide groove 8712e after passing through the stopper protrusion 8712f, the air flow guide 87 cannot rotate counterclockwise any more due to the action of the guide protrusion. .

In this way, when the rotational movement of the air flow guide 87 is no longer possible, the coupling between the lower guide 871 and the duct body 851 can be completed, and the guide protrusion is a stopper protrusion (unless another external force acts) 8712f) may be fixed to the other end side of the second guide groove 8712e.

Therefore, the arrangement of the airflow guide 87 to the fixed position to the connection duct unit 85 can be completed through a very simple manipulation or assembling process including a simple vertical movement operation and a simple rotational movement operation.

However, the lower guide 871 of the air flow guide 87 can maintain a state in which rotational movement in the circumferential direction is prevented by the stopper protrusion 8712f, but the fixed state is released by a fairly small level of external force this may occur.

That is, based on the illustrated embodiment, the air flow guide 87 fixed in a fixed position is prevented from clockwise rotation causing loosening of the fixed state simply by the interaction between the guide protrusion and the stopper protrusion 8712f. become a state

Therefore, even if a fairly small level of external force acts on the rear side of the airflow guide 87, which is horizontally far from the central axis C of the duct coupling portion 8712 of the lower guide 871, which is the center of rotation, the duct coupling portion The stopper protrusion 8712f that is close to the central axis C of the 8712 has a structure that inevitably generates a considerably high torque.

The air flow guide 87 of the dishwasher according to an embodiment of the present invention is an anti-loosening unit ( 8711e).

As described above, the loosening prevention unit 8711e is exemplarily formed by forming an L-shaped notch at the lower end of the second rim wall 8711c of the lower guide 871, that is, of the second rim wall 8711c. It may be integrally formed with the second edge wall 8711c of the lower guide 871 by partially cutting the lower end.

Preferably, the loosening prevention part 8711e may be disposed at a position close to the left edge side of the guide body 8711 of the lower guide 871 among the second edge walls 8711c.

In more detail, as shown in FIGS. 23 and 24, the anti-loosening unit 8711e is disposed in an arcuate shape surrounding the fastening nut 852 disposed inside the second edge wall 8711c, and is elastic. It may be composed of a deformable arc-shaped plate.

One end of the anti-loosening portion 8711e functions as a fixed end 8711e1 integrally connected to the second frame wall 8711c. As will be described later, the fixed end 8711e1 may serve to provide a return force or elastic force to the other end that is deformed during a rotational movement operation for installing and fixing the air flow guide 87.

The other end of the anti-loosening part 8711e is separated from the second rim wall 8711c and functions as a free end 8711e2, and is directly on one side of the stopper 8521 provided on the top of the fastening nut 852. It serves to prevent rotation of the lower guide 871 by contacting it.

The radial thickness of the free end portion 8711e2 may be made larger than the radial thickness of the fixed end portion 8711e1 so as to maintain direct and effective contact and engagement with the stopper 8521.

In more detail, as shown, the outer circumferential surface (8711e4) of the anti-loosening portion (8711e) is maintained at a constant distance from the central axis (C) of the duct coupling portion (8712), and the inner circumferential surface (8711e3) of the anti-loosening portion (8711e) may be configured to include a portion where the distance from the central axis C of the duct coupling portion 8712 is kept constant, and a portion where the distance from the central axis C of the duct coupling portion 8712 changes.

As shown by way of example, the inner circumferential surface 8711e3 of the anti-loosening portion 8711e is in contact with the radially outer end of the stopper 8521 and the non-contact surface maintaining a non-contact state, and the radially outer end of the stopper 8521. It may be configured including a contact surface made of this.

The non-contact surface starts from the fixed end 8711e1 and extends toward the free end 8711e2, has the same curvature as the outer peripheral surface 8711e4, and maintains a constant distance from the central axis C of the duct joint 8712. corresponds to the part.

The contact surface extends from the position where the non-contact surface ends to the free end 8711e2, and corresponds to a portion gradually decreasing in distance from the central axis C of the duct coupling part 8712.

Through this, the free end (8711e2) corresponding to the position where the contact surface ends, as shown in FIG. It can be formed to protrude.

Meanwhile, the contact surface corresponds to a portion directly pressed by the radially outer end of the stopper 8521 while the lower guide 871 rotates.

Therefore, for example, the contact surface may be formed as a curved surface or an inclined surface so that the relative movement of the radially outer end of the stopper 8521 proceeds smoothly and frictional force is reduced.

Meanwhile, a tool groove 8711e5 concavely formed toward the fixed end 8711e1 in the circumferential direction may be formed on the end surface of the free end 8711e2 of the loosening prevention part 8711e.

When the air flow guide 87 is fixed in the fixed position, even if an external force is applied, the air flow guide 87 is separated from the connection duct part 85 unless the loosening prevention part 8711e or the stopper 8521 is destroyed. It is configured so as not to rotate.

In addition, the airflow guide 87 is formed at a position farthest from the front surface of the tub 20, and the loosening prevention part 8711e is formed at a position facing the left side of the bottom tub 20c. Since this position corresponds to a position that is difficult for the user's hand to close, the user cannot easily release the jammed state between the anti-loosening part 8711e and the stopper 8521 without using a separate tool.

Therefore, the user can easily deform the anti-loosening part 8711e using a general tool such as a screwdriver to release the jammed state between the free end 8711e2 of the anti-loosening part 8711e and the stopper 8521. A tool groove 8711e5 may be provided on the end surface of the free end 8711e2 of the prevention portion 8711e.

At this time, the tool groove 8711e5 may be configured to have a polygonal cross section as shown in the drawing so that the general tool can be easily caught during an operation to release the jammed state. 23 and 24 illustratively shows an embodiment including a tool groove 8711e5 having a U-shaped cross-sectional shape among polygonal shapes.

Meanwhile, the loosening prevention unit 8711e is configured such that elastic deformation occurs repeatedly during assembly and separation operations of the airflow guide 87 .

Therefore, fatigue failure may occur due to repeated deformation. In order to prevent such fatigue failure, at least one reinforcing rib 8711e6 protruding outward in a radial direction may be integrally provided on the outer circumferential surface 8711e4 of the loosening preventing part 8711e.

Hereinafter, the action of the anti-loosening part 8711e in the process of coupling the air flow guide 87 will be described with a focus on the relationship between the fastening nut 852 and the stopper 8521.

As described above, the lower guide 871 of the air flow guide 87 is coupled to the duct body 851 of the connection duct unit 85 in a two-step coupling operation including a simple vertical movement operation in the vertical direction and a simple rotation movement operation in the circumferential direction can be combined through

When the vertical movement operation in the vertical direction is completed, as shown in FIG. 23, the free end 8711e2 of the anti-loosening part 8711e can be located in the space between the pair of adjacent stoppers 8521 in the circumferential direction. there is.

As shown, a space between a pair of adjacent stoppers 8521 may be implemented by an arc groove that is open upward and radially outward.

When the circumferential rotational movement operation is started after the vertical vertical movement operation is completed, the outer end in the radial direction of the stopper 8521 disposed in the front with respect to the rotational direction of the airflow guide 87 among the pair of stoppers 8521 Contact between the contact surface of the anti-loosening portion 8711e may be initiated.

When contact between the outer end in the radial direction of the stopper 8521 and the contact surface of the anti-loosening portion 8711e is initiated, the rotational force of the air flow guide 87 is converted into a pressing force against the anti-loosening portion 8711e.

Therefore, the anti-loosening part 8711e is gradually pushed outward in the radial direction by being pressed by the stopper 8521 in a fixed state from the initial position in a no-load state, and elastically deforming.

At this time, the elastic deformation of the anti-loosening portion 8711e may continue until the free end 8711e2 is released from contact with the radially outer end of the stopper 8521.

Therefore, as shown in FIG. 24, when the contact between the free end 8711e2 of the anti-loosening part 8711e and the stopper 8521 is released, the anti-loosening part 8711e returns to its initial position by momentary elasticity with a click sound. can be returned to

At the same time as the release preventing portion 8711e is returned to the initial position, the free end 8711e2 of the loosening preventing portion 8711e protrudes into the inside of the arc groove formed on the front side of the stopper 8521.

Therefore, once the air flow guide 87 is rotated counterclockwise as shown, and the free end 8711e2 of the loosening prevention part 8711e enters the inside of the arc groove, clockwise rotation, which is the opposite direction, is the stopper It can only be stopped by the side of (8521).

Through this, the rotational movement in the direction of separating the air flow guide 87 from the duct body 851 of the connecting duct can be effectively prevented through the loosening prevention part 8711e and the stopper 8521.

However, in the case where the rotational movement is not completed during the second-stage coupling operation, the free end 8711e2 of the anti-loosening portion 8711e can pass through the previous stopper 8521 and rotate toward another adjacent stopper 8521. there is. In this case, in the same manner as described above, the free end 8711e2 of the anti-loosening part 8711e can continue to additionally rotate while riding over the other stopper 8521, and in the same way, in the opposite direction of the air flow guide 87 Rotation can be prevented.

As described above, this additional rotational movement may proceed until the guide protrusion provided on the duct body 851 reaches the other end of the second guide groove 8712e.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed herein, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operation and effect according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention above, it is natural that the effects predictable by the corresponding configuration should also be recognized.

1: Dishwasher 10: Case
20: tub 30: door
40: drive unit 50: storage unit
60: blowing unit 80: drying air supply unit
87: air flow guide 90: base

Claims (11)

a tub having an open front washing space in which objects to be washed are accommodated;
a drying air supply unit disposed at a lower side of the tub and supplying dry air to the washing space by generating dry air for drying the object to be washed; and
an air flow guide disposed in the washing space and configured to change and spray a flow direction of the drying air supplied from the drying air supply unit;
including,
The airflow guide,
a lower guide coupled to the drying air supply unit and into which the drying air generated by the drying air supply unit is introduced; and
an upper guide having a lower surface open and fastened to an upper side of the lower guide to form a discharge port through which the drying wind is sprayed together with the lower guide;
Including,
The dishwasher of claim 1 , wherein the airflow guide includes an erroneous assembly prevention part preventing the upper guide from being coupled to the lower guide out of a preset position.
In paragraph 1,
The dishwasher of claim 1, wherein the upper guide cannot be fastened to the lower guide at a position out of the preset position by the erroneous assembly prevention unit.
In paragraph 2,
The lower guide includes a plate-shaped guide body having a reference surface forming a lower edge of the discharge port and coupled to an open lower surface of the upper guide,
The erroneous assembly prevention part includes an erroneous assembly prevention groove formed by extending along an outer rim of the guide body and being recessed lower than the reference surface in a vertical direction,
When the upper guide is arranged at the predetermined position, the lower end of the upper guide can be inserted into the erroneous assembly prevention groove.
In paragraph 3,
When the upper guide is arranged out of the preset position, the lower end of the upper guide cannot be inserted into the erroneous assembly prevention groove.
In paragraph 3,
The reference plane extends to one edge of the guide body,
The erroneous assembly prevention groove extends along an outer rim of the guide body except for a region where the reference surface is formed.
In paragraph 5,
The upper guide has a notch hole forming a front edge, a rear edge and an upper edge of the discharge port,
The lower end of the notch hole extends to the lower end of the upper guide to be in a generally open state.
In paragraph 6,
When the upper guide is coupled to the lower guide in a state in which the upper guide is arranged at the predetermined position,
A dishwasher in which the reference surface of the lower guide is inserted into the open lower end of the notch hole.
In paragraph 6,
When the upper guide is coupled to the lower guide in a state in which the upper guide is arranged out of the preset position,
The lower end of the upper guide is caught on the reference surface of the lower guide so that it cannot be inserted into the erroneous assembly prevention groove.
In paragraph 3,
The lower guide,
Further comprising a cylindrical duct coupling part integrally formed with the guide body and having a lower end connected to the drying air supply part;
The erroneous assembly prevention unit,
an upper guide catching protrusion protruding from the outer surface of the duct coupling part; and
a catching hole provided at a position corresponding to the upper guide catching protrusion and formed penetrating the inside and outside of the upper guide;
Dishwasher containing a.
In paragraph 9,
When the upper guide is coupled to the lower guide in a state in which the upper guide is arranged at the predetermined position,
The dishwasher of claim 1 , wherein the upper guide locking protrusion is inserted into the locking hole, and the upper guide is fastened to the lower guide.
In paragraph 10,
When the upper guide is coupled to the lower guide in a state in which the upper guide is arranged out of the preset position,
The upper guide locking protrusion is a dishwasher in which it is impossible to insert it into the locking hole.

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