KR20200018013A - Dish Washer And Control Method thereof - Google Patents

Abstract

The present invention relates to a dishwasher. According to the present invention, the dishwasher includes: a cabinet forming an exterior; a tub placed in the cabinet, and forming a washing chamber in which a washing target is placed; a heat exchange duct placed between the tub and the cabinet, and forming a heat exchange flow path in which air flowing from the outside of the cabinet flows; a first circulation duct placed between the heat exchange duct and the cabinet, and forming a circulation flow path in which the air discharged from the tub flows; a second circulation duct supplying the air circulated in the first circulation duct to the tub; a fan assembly sending the air flowing in the first circulation duct to the second circulation duct, and sending outside air flowing from the outside of the cabinet to the heat exchange flow path; and a guide valve opening or closing a guide hole formed between the first circulation duct and the heat exchange duct to connect the heat exchange flow path to the circulation flow path. Therefore, the dishwasher is capable of enhancing a performance of dehydration by circulating air in the tub.

Description

Dish Washer and Control Method

The present invention relates to a dishwasher, and more particularly, to a dishwasher capable of circulating or discharging air in a tub.

The dishwasher is a device that can wash dishes using water and detergent in a space where the dishes can be stored, and wash the dishes through a rinsing and drying process. Cleaning and rinsing with water and detergent can remove foreign substances from the dishes. In addition, it is possible to finish the washing of the dish through a drying process to remove the water remaining in the dish.

The drying process of the dishwasher increases the temperature of the water sprayed on the tableware, increases the temperature of the tableware, promotes the evaporation of the water on the tableware, and condenses the evaporated water vapor in a cooling duct located inside or outside the washing tank, Absorption can be done.

When the humid air inside the dishwasher is discharged to the outside, the dishes inside the dishwasher can be dried quickly.However, when the humid air is discharged to the outside of the dishwasher, There is a problem that may occur, such as mold or damage the external configuration.

The problem to be solved by the present invention is to provide a dishwasher capable of efficiently drying the inside of the tub by treating the humid air inside the tub.

Still another object of the present invention is to provide a control method of a dishwasher that does not damage the surrounding configuration of the dishwasher by circulating or exhausting the air inside the tub according to the degree of humidity of the air inside the tub.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the dishwasher according to the present invention, the cabinet forming the outer shape; A tub disposed inside the cabinet and forming a washing chamber in which a washing object is disposed; A heat exchange duct disposed between the tub and the cabinet and forming a heat exchange passage through which air introduced from the cabinet flows; A first circulation duct disposed between the heat exchange duct and the cabinet and forming a circulation passage through which air discharged from the tub flows; A second circulation duct for supplying air flowing through the first circulation duct to the tub; A fan assembly which sends air flowing through the first circulation duct to the second circulation duct and sends outside air introduced from the outside of the cabinet to the heat exchange path; And a guide valve for opening and closing a guide hole formed between the heat exchange duct and the first circulation duct so that the heat exchange passage and the circulation passage communicate with each other.

The guide valve has a lower end rotatably fixed between the circulation passage and the heat exchange passage, so that air in the circulation passage flowing from the upper side to the lower side may flow into the heat exchange passage.

A partition wall partitioning the circulation flow path and the heat exchange flow path is formed, and the guide valve has an upper end contacting the partition wall or rotating in the circulation flow path and spaced apart from the partition wall so as to flow from the upper side to the lower side. Air can flow into the heat exchange path.

When the guide valve rotates toward the circulation passage, the guide valve may be inclined upwardly of the circulation passage so that air in the circulation passage flowing from the upper side to the lower side may flow into the heat exchange passage.

It may be disposed on the second circulation duct, including a circulation heater for heating the air flowing through the second circulation duct, it is possible to heat the circulating air to supply the inside of the tub.

The controller further includes a control unit configured to control the opening and closing of the guide valve, wherein the control unit opens the guide valve when the fan assembly is operated and the first predetermined time elapses, thereby removing some of the moisture in the tub in a circulation process. Can be discharged by mixing with the outside air.

And an exhaust duct for discharging air exchanged with the first circulation duct in the heat exchange duct to the outside of the cabinet, wherein the exhaust duct is disposed above the tub, and discharges air in front of the cabinet, and exhausts the exhaust duct. The duct forms a plurality of exhaust ports opened in front of the cabinet, and the plurality of exhaust ports are spaced at a predetermined interval so that air can be smoothly discharged through the exhaust port even when the door is locked.

In order to achieve the above object, the control method of the dishwasher according to the present invention, spraying the washing water to the washing chamber formed in the tub to wash the washing target mounted on the washing chamber; The outside air flows to the heat exchange passage formed in the heat exchange duct disposed on one side of the tub and is exhausted to the outside of the cabinet, and the air flows in the cleaning chamber to the circulation passage formed inside the first circulation duct disposed on the side of the heat exchange duct. A hot air circulation step of supplying heat to the heat-exchanged air by a second circulation duct to the washing chamber; And a guide valve for opening and closing a guide hole formed between the heat exchange duct and the first circulation duct, supplying a part of air flowing into the circulation passage in the washing chamber to the heat exchange passage to flow the heat exchange passage. And a hot air exhaust step of mixing the outside air to exhaust the outside of the cabinet and heating the remaining portion of the air flowing from the inside of the washing chamber to the circulation passage in the second circulation duct to supply the washing chamber to the tub. When the internal air is circulated and dried, and a certain level of drying is performed, the air inside the tub may be mixed with the outside air and discharged to increase the speed of drying.

When the hot air circulation step is performed and the first predetermined time is passed, the hot air exhaust step may be performed to discharge air from which a predetermined level of humidity has been removed.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the dishwasher of the present invention, there are one or more of the following effects.

First, the dishwasher of the present invention has the advantage of improving the drying performance by circulating or exhausting the air in the tub according to the humidity of the air in the tub.

Second, the humidity of the air inside the tub is discharged to the outside at a certain level or less, without damaging the configuration around the dishwasher, there is an advantage that can perform the drying step.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic front cross-sectional view of a dishwasher according to one embodiment of the present invention.
Figure 2 is a block diagram illustrating the flow of air in the dish washer in the drying process according to an embodiment of the present invention.
3 is a view for explaining the flow of air in the drying process according to an embodiment of the present invention.
4 is a view for explaining the heat exchange generated in the air flowing through the tub, the circulation duct and the heat exchange duct according to an embodiment of the present invention.
5 is a view for explaining the internal configuration of the first circulation duct according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view taken along the line VI-VI ′ of FIG. 5.
FIG. 7 is a view for explaining the flow of condensate in the drawing of FIG. 5.
8A is a view for explaining the arrangement of the guide valve and the flow of air in the circulation mode according to an embodiment of the present invention.
8B is a view for explaining the arrangement of the guide valve and the flow of air in the discharge mode according to an embodiment of the present invention.
9 is a block diagram illustrating a relationship between a control unit and a configuration operated by the control unit according to an embodiment of the present invention.
10 is a flowchart illustrating a control method of the dish washer according to an embodiment of the present invention.
11 is a flowchart illustrating a drying step in the control method of the dish washer according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention belongs It is provided to fully inform the person having the scope of the invention, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for describing the dishwasher according to embodiments of the present invention.

<Configuration of Dishwasher>

1 is a schematic front cross-sectional view of a dishwasher according to one embodiment of the present invention.

Referring to FIG. 1, the dishwasher 10 according to the present embodiment is coupled to a cabinet 12 and a cabinet 12 forming an outer shape, and a door 16 and a cabinet 12 that open and close the inside of the cabinet 12. It includes a tub 14 installed therein and formed with a washing chamber 14a for processing the dishes placed therein. The cabinet 12 and the tub 14 have a form in which the front surface on which the door 16 is disposed is opened.

The dishwasher 10 according to the present embodiment may include a dispenser (not shown) for storing the detergent introduced by the user and injecting the detergent into the tub 14 in the washing step. The dispenser may be disposed in the door 16.

Cabinet 12 according to the present embodiment forms an outer shape, one side may be open.

The tub 14 according to the present embodiment is disposed inside the cabinet 12. The tub 14 according to the present exemplary embodiment may form a space between the cabinet 12 and the heat exchange duct 80 and the circulation ducts 60 and 70 to be described below. In the upper surface of the tub 14 according to the present embodiment, a circulation duct inlet hole 62a through which air flowing through the washing chamber 14a inside the tub 14 is discharged to the circulation ducts 60 and 70 is formed. At the side of the tub 14 according to the present embodiment, the circulation duct exhaust hole 76 through which air flowing in the circulation ducts 60 and 70 is discharged to the washing chamber 14a inside the tub 14 is formed.

Dishwasher 10 according to the present embodiment is a rack (36, 38) for receiving the dishes in the tub 14, the spray nozzle 30 for spraying the washing water toward the dishes accommodated in the rack (36, 38) 32, 34, a sump 18 for supplying washing water to the injection nozzles 30, 32, and 34, and a washing pump 20 for pumping the washing water stored in the sump 18 into the injection module.

The racks 36 and 38 include an upper rack 36 disposed above the washing chamber 14a and a lower rack 38 disposed below the upper rack 36. The spray nozzles 30, 32, and 34 are disposed on the upper side of the washing chamber 14a and disposed between the top spray nozzle 30, the upper rack 36, and the lower rack 38 for spraying the washing water into the washing chamber 14a. It is disposed below the upper injection nozzle 32 and the lower rack 38 for spraying the washing water to the upper rack 36 or the upper rack 36 and the lower rack 38, spraying the washing water to the lower rack (38) It may further include a lower portion four nozzles (34). Each of the plurality of injection nozzles 30, 32, and 34 may be connected to a plurality of injection nozzle connecting pipes 40, 42, and 44.

In the washing pump 20, the impeller 22 rotating to supply the washing water in the washing pump 20 to the plurality of injection nozzles, the washing motor 24 rotating the impeller 22, and the washing pump 20 inside the washing pump 20. It may include a heater 26 for heating the wash water. The washing water pumped from the washing pump 20 flows through the washing water supply pipe 46, and the switching valve 28 connects at least one of the plurality of injection nozzles 30, 32, and 34 to the washing water supply pipe 46.

The dishwasher 10 according to the present embodiment is connected to a water supply assembly for supplying water to the sump 18 or the injection module, a drainage assembly for discharging the washing water to the outside by being connected to the sump 18, and the wash water is installed. It may further include a washing water heating module 56 installed in the filter 19 and the sump 18 to filter the heating water.

The dishwasher according to the present embodiment may further include an input unit (not shown) for receiving a command from a user and a display unit (not shown) for displaying a progress state or displaying a notification to the user. The input unit may use a touch input method or a button input method, and the display unit may use a display or a warning lamp.

Figure 2 is a block diagram illustrating the flow of air in the dish washer in the drying process according to an embodiment of the present invention. 3 is a view for explaining the flow of air in the drying process according to an embodiment of the present invention. 4 is a view for explaining the heat exchange generated in the air flowing through the tub, the circulation duct and the heat exchange duct according to an embodiment of the present invention. 5 is a view for explaining the internal configuration of the first circulation duct according to an embodiment of the present invention. 6 is a cross-sectional view taken along the line VI-VI ′ of FIG. 5. FIG. 7 is a view for explaining the flow of condensate in the drawing of FIG. 5. 8A is a view for explaining the arrangement of the guide valve and the flow of air in the circulation mode according to an embodiment of the present invention. 8B is a view for explaining the arrangement of the guide valve and the flow of air in the discharge mode according to an embodiment of the present invention.

Hereinafter, a structure of a dish washing machine including a circulation duct and a heat exchange duct according to the present embodiment will be described with reference to FIGS. 2 to 8B.

The dishwasher 10 according to the present exemplary embodiment includes air circulating ducts 60 and 70 that form a space in which the air inside the washing chamber 14a flows out of the tub 14 and circulates outside the cabinet 12. A heat exchange duct 80 forming a heat exchange passage 80a to flow in and exchange heat with the circulation ducts 60 and 70 and a fan assembly 100 which forms a flow of air between the circulation ducts 60 and 70 and the heat exchange duct 80. ).

The circulation ducts 60 and 70 are configured to heat the air exchanged with the first circulation duct 60 forming the circulation passage 60a so as to heat exchange the air discharged from the tub 14 with the heat exchange duct 80. 14) The second circulation duct 70 is supplied to the interior of the washing chamber (14a).

The first circulation duct 60 is disposed between the heat exchange duct 80 and the cabinet 12. The first circulation duct 60 according to the present exemplary embodiment may be disposed to be in interview with the heat exchange duct 80 to exchange heat with air introduced from the outside flowing the heat exchange duct 80. In addition, the first circulation duct 60 may be disposed to be in contact with the cabinet 12 to exchange heat with air flowing outside the cabinet 12.

Referring to FIG. 4, the air flowing through the circulation passage 60a formed inside the first circulation duct 60 exchanges heat with the air flowing through the heat exchange passage 70a to generate condensed water and the outside of the cabinet 12. Condensate can be planetary by heat exchange with flowing external air. The first circulation duct 60 may have a plate shape having a hollow inside so as to be disposed between the side of the cabinet 12 and the tub 14.

The first circulation duct 60 is disposed between the side surface of the tub 14 and the cabinet 12 to exchange heat between the heat exchange-circulation duct 64 and the air discharged from the tub 14 to exchange heat with the heat exchange duct 80. It may comprise a connecting duct 62 to the circulation duct (64).

The connection duct 62 connects the circulation duct inlet hole 62a formed on the tub 14 and the heat exchange-circulation duct 64. The connection duct 62 is disposed above the tub 14 to send air from the washing chamber 14a discharged to the circulation duct inlet hole 62a to the heat exchange-circulation duct 64.

A plurality of flow path guides 66 may be formed inside the heat exchange-circulation duct 64 to guide the flow of air. The flow guide 66 adjusts the speed of the air flowing in the heat exchange-circulation duct 64 or allows the effective length of heat exchange to be made at a long distance.

The flow guide 66 according to the present exemplary embodiment may be formed to change the direction of the air flowing through the connection duct 62 to extend the length of the circulation flow path 60a.

Inside the heat exchange-circulation duct 64, a condensation water guide 68 is formed to guide the movement of condensed water condensed in the air flowing through the heat exchange-circulation duct 64.

The condensation water guide 68 according to the present embodiment is disposed below the flow path guide 66. The condensation water guide 68 guides the condensed water formed along the inner wall surface of the heat exchange-circulating duct 64 to the circulation duct exhaust hole 76 formed on the side surface of the tub 14. The condensation water guide 68 according to the present embodiment includes a first condensation water guide 68a formed on one inner wall of the heat exchange-circulation duct 64 and a second condensation water guide formed on the other inner wall of the heat exchange-circulation duct 64. 68b). The condensation water guide 68 according to the present embodiment is formed to be inclined downward forward.

The heat exchange-circulation duct 64 according to the present embodiment has a condensate discharge hole 69a for discharging condensate at one side of the lower portion. The condensate discharge hole 69a according to the present embodiment communicates the heat exchange-circulation duct 64 and the second circulation duct 70.

In the heat exchange-circulation duct 64 according to the present embodiment, a condensate discharge guide 69 for guiding condensate flowing through the condensate guides 68a and 68b to the condensate discharge hole 69a is disposed. The condensate discharge guide 69 according to the present embodiment is disposed below the condensate discharge hole 69a and guides the condensate to the circulation duct exhaust hole 76 formed on the side surface of the tub 14.

The heat exchange-circulation duct 64 may include a plurality of condensate guides 68 for guiding condensate generated by the heat exchange to the circulation duct exhaust hole 76. The plurality of condensation guides 68 may be disposed on one inner side and the other side of the heat exchange-circulation duct 64, respectively.

The second circulation duct 70 flows the first circulation duct 60 to supply heat-exchanged air into the tub 14. The circulation unit heater 78 may be disposed in the second circulation duct 70. Therefore, the air flowing through the second circulation duct 70 may be heated by the circulation heater 78 and supplied into the tub 14.

At the end of the second circulation duct 70, a circulation duct exhaust hole 76 communicating with the washing chamber 14a in the tub 14 is formed. An upper flow passage 72 is formed at an upstream side of the circulation ducts 60 and 70, and an air passage 72 is formed at the downstream thereof, and a lower flow passage 74 is formed to flow air flowed upwardly downward. Downstream of the circulation duct exhaust hole 76 is formed. The circulation heater 78 may be disposed upstream of the upper flow passage. That is, the circulation heater 78 is disposed below the upper flow passage 72.

Therefore, the washing water scattered from the washing chamber 14a in the tub 14 to the second circulation duct 70 may be prevented from flowing into the circulation heater 78.

The heat exchange duct 80 may be disposed between the side surface of the tub 14 and the first circulation duct 60. The heat exchange duct 80 according to the present exemplary embodiment may have a plate shape having a hollow inside so as to be disposed in a space between the tub 14 and the cabinet 12.

Air introduced from the outside flowing the heat exchange duct 80 may exchange heat with the first circulation duct 60. In addition, the air flowing through the heat exchange duct 80 may exchange heat with the air flowing through the washing chamber 14a in the tub 14. Therefore, the hot and humid air flowing through the washing chamber 14a of the tub 14 and the hot and humid air flowing through the first circulation duct 60 are used to exchange condensed water by heat exchange with external air flowing through the heat exchange duct 80. Can be generated.

A separate flow guide (not shown) may also be formed inside the heat exchange duct 80.

The dishwasher 10 according to the present exemplary embodiment may include an exhaust duct 86 for discharging air heat-exchanged with the first circulation duct 60 in the heat exchange duct 80 to the outside of the cabinet 12. The exhaust duct 86 is disposed above the tub 14, and can exhaust air to the front of the cabinet 12.

The exhaust duct 86 may form the exhaust ports 86a and 86b in the upper front of the tub 14. The exhaust duct 86 according to the present exemplary embodiment may be disposed to be biased forward from the upper side of the tub 14 and may include a plurality of exhaust ports 86a and 86b opened forward. Exhaust ports 86a and 86b according to the present embodiment are arranged at regular intervals. Exhaust ports 86a and 86b according to the present exemplary embodiment may be formed at positions spaced apart from each other by left and right with respect to the upper center portion of the tub 14.

The dishwasher 10 according to the present embodiment is disposed between the circulation passage 60a and the heat exchange passage 80a to guide the air flowing through the circulation passage 60a to the heat exchange passage 80a. It includes.

The guide valve 90 is disposed in the guide hole 90a formed between the circulation passage 60a formed in the first circulation duct 60 and the heat exchange passage 80a formed in the heat exchange duct 80. The guide valve 90 may close the guide hole 90a to partition the circulation passage 60a and the heat exchange passage 80a. The guide valve 90 may open the guide hole 90a to guide the air flowing through the circulation passage 60a to the heat exchange passage 80a.

The guide valve 90 is disposed above the heat exchange-circulation duct 64 and the heat exchange duct 80. The lower end of the guide valve 90 is rotatably fixed between the circulation passage 60a and the heat exchange passage 80a, and the upper end of the guide valve 90 abuts on the partition wall 92 that divides the circulation passage 60a and the heat exchange passage 80a. , Are spaced apart. The guide valve 90 according to the present embodiment is rotated in the circulation flow path 60a to be spaced apart from the partition wall 92. The guide valve 90 according to the present exemplary embodiment is disposed to be inclined upwardly of the circulation passage 60a when the guide valve 90 rotates toward the circulation passage 60a.

Air introduced into the cabinet 12 from the outside may flow to the heat exchange duct 80 through an outside air inlet duct (not shown). The air inlet duct according to the exemplary embodiment of the present invention may be formed at one side of the circumferential surface on which the fan motor 134 of the fan assembly 100 is disposed. In this case, the outside air may flow into the rear of the cabinet 12. The air inlet duct according to another embodiment of the present invention may be disposed below the fan assembly 100. In this case, the outside air may be introduced into the cabinet 12 through the lower side of the cabinet 12. In addition, outside air may flow in through the front lower side of the cabinet 12, or outside air may flow in the other direction.

The fan assembly 100 may send air flowing through the first circulation duct 60 to the second circulation duct 70, and send air introduced into the cabinet 12 from the outside to the heat exchange duct 80.

In the fan assembly 100 according to the present embodiment, the first chamber 112 which communicates the first circulation duct 60 and the second circulation duct 70, and the external air inlet duct and the heat exchange duct 80 communicate with each other. Two chambers 114 are formed. The first chamber 112 is provided with a first fan 118 for flowing the air of the first circulation duct 60 to the second circulation duct 70, the air of the outside air inlet duct is provided in the second chamber (114). The second fan 120 may be disposed to flow into the heat exchange duct 80. In addition, the fan assembly 100 may include a fan motor 134 for rotating the first fan 118 and the second fan 120 at the same time. The fan motor 134 is disposed on one side of the first fan 118 or the second fan 120 to simultaneously rotate the first fan 118 and the second fan 120. The fan assembly 100 according to the present embodiment is disposed below the tub 14. The fan assembly 100 according to the present exemplary embodiment has a structure in which two fans 118 and 120 are driven by one fan motor 134.

9 is a block diagram illustrating a relationship between a control unit and a configuration operated by the control unit according to an embodiment of the present invention.

The dishwasher according to the present embodiment includes a controller 200 for changing the arrangement of the guide valve 90. The controller 200 according to the present exemplary embodiment may operate the fan motor 122 and the circulating heater 78 in a drying stroke for drying the washing object in the washing chamber 14a. The controller 200 according to the present exemplary embodiment may control the water supply valve and the drain pump to receive the washing water into the dishwasher 10 or discharge the washing water to the outside of the dishwasher 10.

The controller 200 according to the present exemplary embodiment may control the operation of the washing motor 24 to supply the washing water to the plurality of injection nozzles 30, 32, and 34. The controller 200 according to the present exemplary embodiment may control the operation of the heater 26 to heat the washing water. The controller 200 according to the present exemplary embodiment may control the switching valve 28 to supply the washing water pumped from the washing pump 20 to at least one of the plurality of injection nozzles 30, 32, and 34.

10 is a flowchart illustrating a control method of the dish washer according to an embodiment of the present invention. 11 is a flowchart illustrating a drying step in the control method of the dish washer according to an embodiment of the present invention.

Hereinafter, a method of controlling a dish washing machine according to an embodiment of the present invention will be described with reference to FIGS. 10 to 11.

The dish washing machine control method according to the present invention may sequentially perform a preliminary washing step (s100), steam washing step (s200), main washing step (s300), rinsing step (s400) and drying step (s500).

Pre-cleaning step (s100) is a stroke for removing the dirt attached to the washing target by spraying the washing water to the washing target. In the preliminary washing step (s100), the controller 110 controls the water supply valve 50 to supply the washing water from the external water source into the sump 18. After the water supply, the control unit 200 operates the washing pump 20 to pump the washing water in the sump 18 and controls the switching valve 28 to wash the washing water through at least one of the plurality of injection nozzles 30, 32, and 34. Spray it. The washing water sprayed through at least one of the plurality of spray nozzles 30, 32, and 34 drops the dirt attached to the washing object to the bottom of the tub 14 and collects the filter 19. After the washing water injection, the control unit 200 operates the drain pump 54 to drain the washing water in the sump 18 to the outside.

In the present embodiment, the preliminary washing step s100 may be performed at various times at least once or more times according to the embodiment.

Steam washing step (s200) is a stroke called the dirt attached to the washing target with sterilization by spraying the heated washing water to the washing target and steam to the washing target. In the steam washing step s200 according to the present embodiment, steam and high temperature washing water may be sprayed at the same time.

In this case, the steam injected through the steam nozzle (not shown) may act on the cleaning object to call the dirt attached to the sterilization or cleaning object, and the hot washing water discharged through the steam nozzle flows to the bottom of the tub 14. Thus, the bottom of the tub 14 can be sterilized or dirt stuck to the bottom of the tub 14 can be removed.

Detailed description of the steam washing step (s200) will be described later with reference to FIG.

The main washing step (s300) is a stroke for spraying the heated washing water to the washing target to heat the washing target and to remove the dirt attached to the washing target. In the main washing step s300, the control unit 200 controls the water supply valve 50 to supply the washing water to the sump 18 from an external water source. Thereafter, the heater 26 is controlled to heat the washing water, and the washing pump 20 is operated to spray the heated washing water through at least one of the plurality of spray nozzles 30, 32, and 34. At this time, the dispenser (not shown) disposed in the door 16 is opened, the detergent is mixed with the washing water flowing in the tub 14, the washing object can be washed. Thereafter, the drain pump 54 is operated to drain the washing water in the sump 18 to the outside.

The rinsing step (s400) is a stroke for removing the remaining dirt adhered to the washing object, or rinsing the washing object with the washing water mixed with detergent. In the rinsing step (s400), the controller 200 controls the water supply valve 50 to supply the washing water from the external water source to the sump 18, and then operates the washing pump 20 to operate the plurality of injection nozzles 30, 32, and the like. 34) The washing water is sprayed through at least one of them. Thereafter, the drain pump 54 is operated to drain the washing water in the sump 18 to the outside. In the rinsing step (S400), the rinsing detergent may be mixed with the washing water.

The drying step s500 is a stroke for drying the inside of the washing chamber 14a while circulating air in the tub 14 by heat-exchanging and heating the circulated air. In the drying step (s500), the control unit 200 may operate the fan motor 122 to flow air into the circulation ducts 60 and 70 and the heat exchange duct 80. In addition, the controller 200 may operate the circulation heater 78 to heat the circulating air introduced into the tub 14.

It is also possible to further add a heating rinse step of heating the washing object by spraying the washing water heated between the rinsing step (s400) and the drying step (s500).

Drying step (s500) is a hot air circulation step (s510) is operated with the guide valve 90 closed the guide hole (90a), and hot air is operated with the guide valve 90 is open the guide hole (90a) It comprises a discharge step (s530).

In the hot air circulation step (s510), the fan motor 122 and the circulation heater 78 are operated with the guide valve 90 closing the guide hole 90a. Accordingly, the humid air discharged from the tub 14 flows through the first circulation duct 60 and heat exchanges with external air flowing through the heat exchange duct 80 to generate condensed water and be primarily dried. In addition, the air flowing through the first circulation duct 60 flows into the second circulation duct 70 by the fan assembly 100, is heated by the circulation unit heater 78, and the circulation duct exhaust hole 76. It may be supplied into the tub 14 through). As described above, the humid air inside the tub 14 flows through the circulation ducts 60 and 70, and is dried and heated to be supplied into the tub 14 again to dry the inside of the tub 14.

In addition, the air introduced from the outside by the fan motor 122 flows through the heat exchange duct 80, heat exchanges with the air flowing through the first circulation duct 60, and is discharged to the outside of the cabinet 12. In the hot air circulation step s510, the heat exchange duct 80 flows, and the air discharged to the outside does not discharge the humid air simply by heat exchange.

Hot air discharge step (s530) operates the fan motor 122 and the circulation heater 78 with the guide valve 90 open the guide hole (90a). In the hot air discharge step (s530), a part of the air discharged from the tub 14 to the first circulation duct 60 is introduced into the heat exchange duct 80, and mixed with the air introduced from the outside flowing the heat exchange duct 80. Can be discharged to the outside.

However, the hot air discharge step s530 may proceed after a predetermined time has elapsed after the hot air circulation step s510 is performed. That is, the hot air circulation step s510 may be performed, and the hot air discharge step s530 may be performed in a state in which the first set time is over, after step s520 of comparing whether the first set time has elapsed.

Excessive humid air discharged inside the tub 14 outside the cabinet 12 may damage items around the dishwasher 10 or may cause discomfort to the user. Therefore, the first set time may be set in consideration of the size of the washing chamber 14a formed in the tub 14, the rotation speed of the fan motor 122, and the like.

Although the above has been illustrated and described with respect to the preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, but in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

10 dishwasher 12 cabinet
14: Tub 14a: Washing Room
16: door 18: sump
20: washing pump 60: the first circulation duct
60a: circulation duct euro 62: connection duct
62a: circulation duct inlet hole 64: circulation duct-heat exchange part
70: second circulation duct 72: upward flow
74: descending passage 76: circular duct exhaust hole
78: circulation heater 80: heat exchange duct
80a: heat exchange path 86: exhaust duct
90: guide valve 90a: guide hole
92: bulkhead 100: fan assembly
110: fan housing 112: the first chamber
114: second chamber 118: first fan
120: second fan 200: control unit

Claims (10)

A cabinet forming an appearance;
A tub disposed inside the cabinet and forming a washing chamber in which a washing object is disposed;
A heat exchange duct disposed between the tub and the cabinet and forming a heat exchange passage through which air introduced from the cabinet flows;
A first circulation duct disposed between the heat exchange duct and the cabinet and forming a circulation passage through which air discharged from the tub flows;
A second circulation duct for supplying air flowing through the first circulation duct to the tub;
A fan assembly which sends air flowing through the first circulation duct to the second circulation duct and sends outside air introduced from the outside of the cabinet to the heat exchange path; And
And a guide valve for opening and closing a guide hole formed between the heat exchange duct and the first circulation duct so that the heat exchange passage and the circulation passage communicate with each other. The method of claim 1,
And the guide valve has a lower end rotatably fixed between the circulation passage and the heat exchange passage. The method of claim 1,
A partition wall is formed to partition the circulation passage and the heat exchange passage;
The guide valve is a dishwasher, the upper end is in contact with the partition wall, or rotated in the direction of the circulation passage, spaced apart from the partition wall. The method of claim 3, wherein
The guide valve is dishwasher disposed to be inclined toward the upper side of the circulation passage, when rotating to the circulation passage side. The method of claim 1,
And a circulation unit heater disposed on the second circulation duct and configured to heat air flowing through the second circulation duct. The method of claim 1,
Further comprising a control unit for controlling the opening and closing of the guide valve,
The control unit is a dishwasher to operate the fan assembly, when the first set time elapses, the guide valve to open. The method of claim 1,
And an exhaust duct for discharging air exchanged with the first circulation duct in the heat exchange duct to the outside of the cabinet.
The exhaust duct is disposed above the tub, the dishwasher for discharging air to the front of the cabinet. The method of claim 7, wherein
The exhaust duct forms a plurality of exhaust openings opened in front of the cabinet,
The plurality of exhaust ports are dishwasher spaced at a predetermined interval. Spraying the washing water into the washing chamber formed inside the tub to wash the washing target placed in the washing chamber;
The outside air flows to the heat exchange passage formed in the heat exchange duct disposed on one side of the tub and is exhausted to the outside of the cabinet, and the air flows in the cleaning chamber to the circulation passage formed inside the first circulation duct disposed on the side of the heat exchange duct. A hot air circulation step of supplying heat to the heat-exchanged air by a second circulation duct to the washing chamber; And
Opening a guide valve for opening and closing the guide hole formed between the heat exchange duct and the first circulation duct, to supply a portion of air flowing into the circulation passage in the washing chamber to the heat exchange passage to flow the heat exchange passage Mixing with the outside air to exhaust the outside of the cabinet, and the remaining portion of the air flowing in the circulation passage from the inside of the washing chamber is heated in the second circulation duct to supply to the washing chamber of the dishwasher Control method. The method of claim 9,
The hot air circulation step is performed, when the first set time is over, the control method of the dishwasher to perform the hot air exhaust step.

Images