KR101295946B1 - Dish washer and method of controlling the same - Google Patents

Abstract

The present disclosure relates to a dishwasher. Dishwasher according to one aspect,

Description

Dish washer and method of controlling the same

The present specification relates to a dishwasher and a control method thereof.

In general, the dishwasher includes a dish rack for storing dishes in a tub, a spray nozzle for spraying the washing water onto the dishes stored in the dish rack, a sump for supplying the washing water to the spray nozzle, and the washing water for the sump. And a washing pump for pumping the washing water of the sump.

The dishwasher is configured to drive the washing pump to spray the washing water stored in the sump into the spray nozzle. The washing water sprayed from the spray nozzle is ejected at a high pressure to hit the surface of the dish stored in the dish rack. Therefore, the dirt on the surface of the tableware is separated by the water pressure of the washing water that strikes the surface of the tableware.

In addition, the dish washing process is performed in the order of a washing stroke for washing the dirt on the tableware, a rinsing stroke for rinsing the dishes after the washing process is finished, and a drying stroke for removing moisture from the surface of the dish after the rinsing is finished. . Since no washing water is used in the drying stroke, water is not supplied to the water supply device. In the drying process, the outside air and the inside air are mixed to condense and some air is discharged to the outside.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dishwasher and a method of controlling the same in which drying performance is improved.

In one embodiment, a dishwasher includes: a dishwasher performing a washing stroke, a rinsing stroke, and a drying stroke, the tub including a dish; Sump for supplying water to the tub; And a water supply device for supplying water supplied from the outside to the sump, wherein the water is intermittently supplied to the water supply device a plurality of times during the drying process.

According to another aspect, a control method of a dish washing machine includes a tub for accommodating dishes, a sump for supplying water to the tub, and a water supply device for supplying water supplied from the outside to the sump. A method comprising the steps of: performing a washing stroke; A rinsing stroke is performed after the washing stroke is completed; Starting a drying stroke after the rinsing stroke is completed; And supplying water to the water supply device intermittently after the start of the drying stroke.

According to the proposed invention, since water is intermittently supplied to the water supply apparatus during the drying stroke, the temperature of the surface facing the tub of the water supply apparatus is lowered, and consequently, the condensation performance of the air in the tub. This has the advantage of being improved.

1 is a cross-sectional view schematically showing a dish washing machine according to a first embodiment of the present invention.
2 is a cross-sectional view showing a water supply apparatus according to a first embodiment of the present invention.
3 is a bottom view of the nozzle installed in the water supply device;
4 is a cross-sectional view taken along the line AA of FIG. 2.
5 is a view for explaining the arrangement of the water supply apparatus and the tub according to the first embodiment of the present invention.
6 is a view for explaining a control method of the dish washer according to the first embodiment of the present invention.
7 is a view for explaining the arrangement of the water supply device and the tub according to the second embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the drawings.

1 is a cross-sectional view schematically showing a dish washing machine according to a first embodiment of the present invention.

Referring to FIG. 1, the dishwasher 100 according to the present embodiment includes a case 101 forming an exterior and a tub provided inside the case 101 and forming a washing space for washing dishes. 104, a sump 105 provided below the tub 104 to collect washing water for washing dishes, and a door 102 to open and close the tub 104.

The control panel 103 for controlling the operation of the dish washing machine is provided above the front surface of the door 102. In the inner space of the tub 104, a plurality of racks on which tableware is placed is provided. The plurality of racks include an upper rack 110 and a lower rack 112 positioned below the upper rack 110. In the present embodiment, for example, two racks 110 and 112 are provided in the tub 104, but the number of the racks in the present embodiment is not limited.

In addition, the tub 104 is provided with a plurality of washing nozzles for receiving the washing water from the sump 105 and spraying the washing water to the dishes placed on the racks 110 and 112.

The plurality of washing nozzles may include a lower nozzle 120 connected to an upper side of the sump 105 and an intermediate nozzle 121 positioned above the lower nozzle 120 to receive washing water from the sump 105. And a top nozzle 122 positioned above the intermediate nozzle 121 and receiving washing water from the sump 10.

The sump 105 is connected to a wash water guide 123 for delivering wash water to the intermediate nozzle 121 and the top nozzle 122. The washing water guide 123 may be formed with a single washing water flow path, or two washing water flow paths may be partitioned. Alternatively, each of the plurality of wash water guides may deliver wash water to each of the intermediate nozzle 121 and the top nozzle 122.

The dishwasher 100 further includes a water supply device 200 disposed between the tub 104 and the case 102 to guide the flow of the washing water. The water supply device 200 stores water to be used for washing.

On the other hand, the dishwasher performs a plurality of strokes until the washing of the dishes is completed. In general, the plurality of strokes may include a washing stroke for washing the dishes, a rinsing stroke for rinsing the dishes and a drying stroke for drying the dishes.

Before starting at least one of the entire strokes for washing the dishes, water is supplied from the outside to the water supply device. At this time, the water supply device collects water to be used for the next stroke.

2 is a cross-sectional view showing a water supply apparatus according to a first embodiment of the present invention, Figure 3 is a bottom view of a nozzle installed in the water supply device, Figure 4 is a cross-sectional view taken along the AA of FIG. 5 is a view for explaining the arrangement of the water supply apparatus and the tub according to the first embodiment of the present invention.

2 to 5, the water supply device 200 according to the present embodiment includes a body 201 forming an external shape. The body 201 includes a first surface 202 facing the tub 104 and a second surface 203 opposite to the first surface 202.

The first surface 202 may be in direct contact with the tub 104. In this case, the first surface 202 and the tub 104 are directly heat exchanged. As another example, as illustrated in FIG. 4, a heat conductive member 300 may be interposed between the first surface 202 and the tub 104. In this case, the first surface 202 and the tub 104 may be heat exchanged by the heat conductive member 300. The thermally conductive member 300 may be a metal material, igraph (graphite is the main component of the US Graphgraf company) and the like.

The body 201 has a water inlet 204 to which a water supply pipe 130 connected to an external water source (not shown) is connected, and a water supply passage 205 through which water introduced into the water inlet 204 flows. And a water chamber 206 in which water flowing along the water supply passage 205 collects.

In addition, the body 201 includes a first drain connection part 242 and a second drain path 152 to which the first drain channel 151 connected to the drain pump 150 connected to the sump 105 is connected. ) May further include a second drain connection portion 244 connected thereto.

In addition, the body 201 has an air inlet hole 208 for introducing external air (air outside the tub) and a communication hole 207 for communicating the body 201 with the tub 104. It may further include.

In addition, the body 201 may be connected to the softening device 140 to remove the hardness component contained in the water. The water in the water chamber 206 may be supplied to the softening device 140 to be introduced into the body 201 again after the hardness component is removed, and finally supplied to the sump 105. Of course, it is also possible that the water passing through the softening device 140 is directly supplied to the sump 105.

In detail, the water supply passage 205 extends upward from the lower side of the body 201. The water supply passage 205 extends in the horizontal direction from the upper side of the body 201. That is, the water supply passage 205 includes a horizontal flow passage 205a.

A plurality of branch portions 210 are formed in the horizontal flow path 205a. The plurality of branch portions 210 extend downward from the horizontal passage 205a. The plurality of branches 210 are spaced apart in the horizontal direction. Therefore, water may be discharged downward from each branch 210.

The lower surface 211 of each branch portion 210 is inclined. Specifically, the lower surface 211 of the branch portion 210 extends downward from the first surface 202 of the body 201 toward the second surface 203.

The lower surface 211 of each branch portion 210 is provided with a nozzle 220 for injecting water into the water chamber 206. The nozzle 220 may be coupled to the nozzle coupling unit 212 formed on the bottom surface 211 of the branch portion 210. For example, a thread is formed on an outer surface of the nozzle 220 and an inner circumferential surface of the nozzle coupling unit 212 so that the nozzle 220 may be fastened to the nozzle coupling unit 212. As another example, the nozzle 220 may be integrally formed on the bottom surface of the branch portion 210.

When the nozzle 220 is coupled to the branch portion 210, the nozzle 220 has a lower surface of the branch portion 210 in a direction parallel to the normal direction of the lower surface 211 of the branch portion 210 ( 211). Therefore, the spray direction of water in the nozzle 220 is inclined in the vertical direction as shown in FIG. That is, water is sprayed from the nozzle 220 toward the first surface 202 of the body 201. Water sprayed toward the first surface 202 of the body 201 flows along the first surface 202 of the body 201.

As such, the water sprayed from the nozzle 220 may flow along the first surface 202 of the body 201, thereby increasing the area and time for the water to contact the body 201. Heat exchange performance with the tub 104 may be improved.

As another example, the lower surface 211 of the branch portion 210 may form a horizontal plane, and the nozzle 220 may be inclinedly coupled to or integrally formed on the lower surface of the branch portion 210. In this case, the water sprayed from the nozzle 220 may be sprayed toward the first surface 202 of the body 201.

The nozzle 220 includes a spray hole 222. At this time, the injection hole 222 is formed in a non-circular shape. For example, the injection hole 222 is formed in an elliptical or similar shape in one long hole type, and is formed long in a direction parallel to the arrangement direction of the branch portion 210. The reason is to allow water to be widely sprayed in the left and right directions with reference to FIG. 2, so that the contact area and time of the water and the body 201 are increased.

In summary, the jet direction of water in the nozzle 220 is the vertical direction, and the arrangement direction of the nozzle is a left and right direction (or front and rear direction) that intersects the vertical direction.

A forming unit 230 is formed on at least a first surface 202 of the body 201 to increase a contact area with water sprayed from the nozzle 220. The forming unit 230 is formed by recessing a portion of the first surface 202 toward the second surface 203.

In this case, although not shown, the forming unit may be formed at a position corresponding to the forming unit 230 of the tub 104. In this case, since the forming part of the tub 104 may be seated on and contact with the forming part 230 of the body 201, the contact area may be increased to improve heat exchange performance.

In addition, a plurality of flow guides 231 and 232 are formed on at least the first surface 202 of the body 201 to prevent water from falling vertically. The plurality of flow guides 231 and 232 include a first flow guide 231 inclined in a first direction and a second flow guide 232 inclined in a second direction opposite to the first direction. That is, the first euro guide 231 is inclined downward from left to right in FIG. 2, and the second euro guide 232 is inclined downward from right to left.

In the present embodiment, the flow path guides 231 and 232 are exemplary, and if there is a structure for preventing the sprayed water from falling vertically, the flow guides 231 and 232 are not limited to the inclination direction, length and shape. However, the flow guides 231 and 232 may have a predetermined length in the left and right directions with reference to FIG. 2 in order to prevent the water from falling vertically.

6 is a view for explaining a method of controlling a dish washing machine according to a first embodiment of the present invention.

Referring to FIG. 6, when the dishwasher of the present embodiment is operated, the washing stroke S1 and the rinsing stroke S2 are sequentially performed. After the rinsing stroke is completed and drainage of the washing water is performed, the drying stroke is started (S3). When the drying stroke is started, outside air and air inside the tub 104 are introduced into the condenser, not shown, and mixed. Then, the moisture-containing air inside the tub is condensed by the condenser.

During this drying stroke, water is intermittently supplied to the water supply device 200. As described above, since the water of the water supply device 200 may be heat-exchanged with the heat of the tub, when water is supplied to the water supply device 200 during the drying stroke, the surface of the surface that is heat-exchanged with the water supply device in the tub. The temperature is lowered, so that condensation of hot and humid air in the tub can be quickly performed, and thus drying time and performance can be improved.

In detail, when the drying stroke is started and a first elapsed time (for example, 15 minutes) has elapsed, water is supplied to the water supply device for a first reference time. That is, when the drying stroke starts and the first reference time elapses, a water supply valve (not shown) is opened to supply water to the water supply device.

At this time, since the contact area of the water and the body is increased by the arrangement of the nozzle and the structure of the body, the heat exchange performance of the water supply device and the tub may be improved.

The water supply is stopped after the water is supplied to the water supply device 200 during the first reference time. When the drying stroke is started and the second elapsed time longer than the first elapsed time (for example, 30 minutes) elapses, the water supply is stopped after the water is supplied to the water supply device 200 for a second reference time. do. At this time, the amount of water supplied to the water supply apparatus 200 at one time may be less than 2/1 of the volume of the water chamber 206.

Then, it is determined whether the drying stroke is completed during the drying stroke (S5), and when the drying stroke is completed, the dishwasher is turned off.

At this time, the water supplied to the water supply during the drying stroke is drained after moving to the sump when the drying stroke is completed, or the washing stroke for the next dish washing in the state stored in the water supply without being drained Can be used in

In the present embodiment, the first elapsed time and the second elapsed time may belong to the first half of the drying stroke when the entire time of the drying stroke is divided into the first half and the second half.

As another example, the first elapsed time may belong to the first half of the drying stroke and the second elapsed time may belong to the second half of the drying stroke. That is, water may be supplied to the water supply device at least once in the entire drying stroke, and water may be supplied to the water supply apparatus at least once in the latter part of the drying stroke.

If the water is supplied to the water supply at the same time as the start of the drying stroke, the temperature of the first surface 202 of the water supply may drop rapidly at the beginning of the drying stroke, but the temperature of the water increases during the drying stroke. The air condensation performance is lowered.

In this embodiment, since the temperature of the first surface 202 and the air temperature inside the tub (or the temperature of the surface facing the first surface of the tub) affect each other, according to the temperature of the first surface 202 The condensation performance of the air inside the tub can vary.

On the other hand, when the drying stroke is started and water is supplied to the water supply device when the first elapsed time and the second elapsed time have elapsed, the temperature of the first surface 202 of the water supply device rapidly increases at the time of water supply. In addition to falling, since the temperature of the first surface of the water supply device is already falling, the temperature rise phenomenon of the water supplied to the water supply device can be minimized.

According to the present embodiment as described above, since water is intermittently supplied to the water supply device while a drying stroke is performed, the temperature of the first surface of the water supply device is lowered, resulting in condensation performance of air in the tub. There is an advantage to be improved.

In addition, the contact area between the water and the first surface of the body is increased by the position of the plurality of branches, the nozzles provided in each branch, the direction of water sprayed from the nozzle, the forming portion and the flow guide formed on the body, There is an advantage that the degree of temperature drop of the first surface of the water supply device becomes large.

7 is a view for explaining the arrangement of the water supply apparatus and the tub according to the second embodiment of the present invention.

The other part of this embodiment is the same as that of the first embodiment, except that there is a difference in the heat exchange structure between the water supply device and the tub. Therefore, only the characteristic parts of the present embodiment will be described below.

Referring to FIG. 7, one or more openings 250 may be formed on a surface facing the tub 104 in the water supply device 200 according to the present embodiment. In addition, the heat conductive member 300 described in the first embodiment may be interposed between the tub and the water supply device. In this case, the heat conductive member 300 may cover the one or more openings 250 on the outside of the water supply device 200.

According to the present embodiment, since a part of the water of the water supply device 200 is in direct contact with the heat conducting member 300 and heat exchanged with the heat of the tub 104, the heat exchange performance is improved.

104: tub 200: water supply device

Claims (13)

In a dishwasher which performs a washing stroke, a rinsing stroke and a drying stroke,
Tub for receiving tableware;
Sump for supplying water to the tub; And
It is provided on one side of the tub, and includes a water supply device for supplying the water supplied from the outside to the sump,
The water supply device,
A horizontal flow passage in which water introduced from the outside flows and is disposed in a horizontal direction on an upper portion of the water supply device;
It includes a plurality of branches provided in the horizontal flow path to be spaced apart from each other in a horizontal direction,
Dishwasher in which water is sprayed through each of the plurality of branches during the drying stroke. The method of claim 1,
Each of the plurality of branches is provided with a nozzle,
The spray hole of the nozzle is provided to be inclined toward one side of the tub dishwasher. 3. The method of claim 2,
Dispensing hole of the nozzle is a dishwasher having a shape extending in the horizontal direction. The method of claim 1,
The water supply device,
And a forming unit for increasing a contact area with water sprayed through each of the plurality of branches on the first surface in contact with one side of the tub. The method of claim 1,
The water supply device,
And a plurality of flow guides on the first surface in contact with one side of the tub to prevent the water sprayed through each of the plurality of branches from falling vertically. The method of claim 1,
And a first surface of the water supply device is in direct contact with the tub. The method of claim 1,
Further comprising a heat conducting member interposed between the first surface of the water supply device and the tub,
The first surface of the water supply device dishwasher is provided with one or more openings. In the control method of the dishwasher comprising a tub for receiving dishes, a sump for supplying water to the tub, and a water supply device provided on one side of the tub and supplied from the outside to the sump,
A washing stroke is performed;
A rinsing stroke is performed after the washing stroke is completed;
Starting a drying stroke after the rinsing stroke is completed;
Introducing water introduced from the outside after the start of the drying stroke into a horizontal flow passage disposed in a horizontal direction on the top of the water supply device;
Spraying water introduced into the horizontal passage through each of the plurality of branch portions provided to be spaced apart from each other in the horizontal direction; And
And water flowing through each of the plurality of basins flows along a first surface of the water supply device in contact with one side of the tub. The method of claim 8,
The control method of the dishwasher to supply water to the water supply device after a predetermined time has passed after the start of the drying stroke. The method of claim 8,
When a first elapsed time has elapsed since the start of the drying stroke, water is supplied to the water supply device for a first reference time and then stopped.
And a second elapsed time after the start of the drying stroke, and stops after water is supplied to the water supply device for a second reference time. The method of claim 8,
When dividing the two parts into the first half and the second half by dividing the entire time of the drying stroke,
Water is supplied to the water supply device at least once in the first half of the drying stroke,
And a method of controlling a dish washing machine in which water is supplied to the water supply device at least once in the second half of the drying stroke. The method of claim 8,
And the water supplied to the water supply device is maintained in the water supply device even after the drying stroke is completed. The method of claim 8,
When the drying stroke is completed, the water supplied to the water supply device is a control method of the dishwasher.

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