WO2019168379A1

WO2019168379A1 - Dishwasher

Info

Publication number: WO2019168379A1
Application number: PCT/KR2019/002435
Authority: WO
Inventors: 주병현; 이유민
Original assignee: 엘지전자 주식회사
Priority date: 2018-02-28
Filing date: 2019-02-28
Publication date: 2019-09-06
Also published as: KR20190103680A; KR102431200B1

Abstract

The present invention relates to a dishwasher comprising: a tub forming a washing chamber for receiving an object to be washed; a sump which is disposed at the lower side of the tub and comprises a water collection part for collecting washing water and a water collection pipe disposed at one side of the water collection part; a washing pump into which washing water flows from the water collection part through the water collection pipe; and a filter which is disposed at the water collection part so as to collect foreign substances included in the washing water flowing into the water collection part, comprises a first mesh having multiple through-holes formed therethrough and a second mesh having multiple through-holes formed smaller than the through-holes of the first mesh, and is disposed to be rotatable so that the first mesh or the second mesh faces toward the water collection pipe according to washing processes.

Description

dish washer

The present invention relates to a dishwasher, and to a dishwasher capable of adjusting filter efficiency according to a washing stroke.

The dishwasher is a household appliance that cleans dirt, such as food waste, which is buried in a dish or cooking utensils (hereinafter, 'to be cleaned') by high-pressure washing water sprayed from a spray arm.

A filter for filtering the washing water mixed with the foreign matter separated from the dishes is provided in the washing room in which the dishes are accommodated. The filter removes debris from the wash water so that the filtered wash water is circulated by the wash pump and continuously wash the dishes. As a patent on the structure of such a filter, there is disclosed Patent Publication No. 10-2017-0081937.

However, conventionally, when filtering the washing water with a large amount of contaminants, the contaminants are caught in the mesh of the filter and become clogged. As a result, the washing water is not circulated smoothly, and thus the washing effect of the dishwasher is deteriorated.

The problem to be solved by the present invention is to solve the problem that the filter is clogged by foreign matter during the operation of the dishwasher, the washing water is not circulated smoothly.

Another problem to be solved by the present invention is to improve the washing effect of the dishwasher.

Another problem to be solved by the present invention is to provide a dishwasher capable of adjusting the filter efficiency according to the washing stroke.

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 an embodiment of the present invention, the tub to form a washing chamber in which the washing object is accommodated, a collecting part disposed under the tub, and the wash water is collected and the collecting part A sump including a sump pipe provided at one side, a washing pump through which the washing water is introduced from the collecting portion through the collecting tube, and collecting foreign substances contained in the washing water disposed in the collecting portion and introduced into the collecting portion, A first mesh including a plurality of through holes and a second mesh having a plurality of through holes formed in a smaller size than the through holes of the first mesh, and rotatably provided to the first mesh or the first And a filter disposed so that two meshes face the sump.

The filter may be rotated about a rotation axis extending up and down, and the first mesh and the second mesh may constitute at least a part of the side surface of the filter at a constant area ratio.

According to an embodiment of the present invention, the dishwasher is disposed on the bottom surface of the water collecting unit, the filter driving unit including a filter rotating body detachably coupled to the filter and a driving motor for providing a rotational force to the filter rotating body It may further include.

The filter driving unit is connected to the rotation axis of the filter and the cam rotates together with the filter, and as the cam rotates to detect the rotation of the cam and the cam to generate a signal, the generated signal to the drive motor It may include a rotation sensor to provide.

The rotation sensor may include a switch for linearly moving the contacted part to be turned on and off, and providing a control signal to the driving motor when the contacted part moves linearly.

According to an embodiment of the present invention, the drive motor may rotate about the first rotation axis. The filter may rotate about a second axis of rotation. The filter driving unit may include a connection device for transmitting the rotational force of the drive motor to the filter.

According to one embodiment of the present invention, the washing stroke may include a first stroke and a second stroke in which the amount of foreign matter contained in the washing water of the sump is smaller than the first stroke. The filter may be disposed such that the first mesh faces the water collection pipe during the first stroke, and the second mesh faces the water collection pipe during the second stroke.

According to one embodiment of the present invention, the sump may further include a barrier wall protruding from the water collecting part toward the filter to cover a portion of the side surface of the filter.

The blocking wall covers the mesh facing the side facing the water collecting tube of the water collecting portion, with the filter disposed such that either the first mesh or the second mesh faces the water collecting tube, It may extend in the rotational direction of the filter and may extend in the rotational axis direction of the filter.

According to an embodiment of the present invention, the sump may include a churmari which surrounds the collection pipe and further protrudes toward the filter from the collection portion.

According to one embodiment of the present invention, the filter may include a third mesh having a plurality of through holes formed in a size smaller than the through holes of the second mesh. In the filter, the first mesh, the second mesh, and the third mesh may constitute at least a portion of the side surface of the filter at a constant area ratio.

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 filter rotates according to the washing stroke, and by changing the mesh passing the washing water, there is an advantage that the filter clogging phenomenon (clogging phenomenon) in the washing stroke with a lot of contaminants.

Second, according to the washing administration, by appropriately adjusting the efficiency of the conflicting filter and the amount of washing water circulation, there is also an advantage that the washing effect is improved.

Third, by providing a blocking wall to prevent the flow of the wash water through the filter not used according to the washing stroke, by inducing the flow of the wash water introduced into the filter, there is also an advantage to maximize the function of the dual mesh filter.

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 structural diagram of a dish washer according to an embodiment of the present invention.

2 is a block diagram of a dish washer according to an embodiment of the present invention.

3 is a perspective view of a partial configuration of a dish washer according to an embodiment of the present invention.

Figure 4 is a perspective view of the sump of the dishwasher according to an embodiment of the present invention.

5 is a plan view of a sump of a dishwasher according to an embodiment of the present invention.

6 is a side view of a partial configuration of the dishwasher according to one embodiment of the present invention.

7 is a bottom view of some components of the dishwasher according to one embodiment of the present invention.

8 is an exploded perspective view of the filter and the filter driving unit in the dishwasher according to the embodiment of the present invention.

9 is a view illustrating a filter in the dishwasher according to one embodiment of the present invention.

10 is a view illustrating a filter in the dishwasher according to one embodiment of the present invention.

FIG. 11 is a cross-sectional view taken along line BB ′ of FIG. 6.

12 is a cross-sectional view taken along line AA ′ of FIG. 7.

13 is a view showing a part of the configuration in the dishwasher according to another 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 with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and common knowledge in the art It is provided to fully inform the person having the scope of the invention, which 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.

First embodiment

Dishwasher (1) according to an embodiment of the present invention is a case (11) for forming the appearance, the tub 12 is provided in the case 11 to form a washing chamber (12a) to accommodate the cleaning object and A door 20 for opening and closing the washing chamber 12a and a sump 100 disposed below the tub 12 to store the washing water, and washing water into the tub 12. A plurality of

injection arms

13, 14 and 15 to inject, a washing pump 150 for supplying the washing water stored in the sump 100 to the plurality of

injection arms

13, 14 and 15 and generating steam, and a door ( 20, a steam nozzle 195 for spraying the steam generated in the washing pump 150 to the washing chamber 12a, and a steam hose 190 for connecting the washing pump 150 and the steam nozzle 195 and And a switching valve 130 disposed on the sump 100 to distribute the washing water to the plurality of

injection arms

13, 14, and 15, and disposed on the collecting part 102 of the sump 100 to the collecting part 102. Contained in the incoming wash water It includes a filter 200 for collecting the foreign matter.

The case 11 can accommodate the tableware to be washed. The case 11 can accommodate all the components of the tub 12 and the dishwasher 1.

The tub 12 is formed in a hexahedron shape with an open front surface to form a washing chamber 12a therein. In the bottom 12b of the tub 12, a communication hole 12c through which the washing water flows into the sump 100 is formed. The washing chamber 12a is provided with a plurality of racks 16 and 17 in which washing objects are stored. The plurality of racks 16 and 17 include a lower rack 16 disposed below the washing chamber 12a and an upper rack 17 disposed above. The lower rack 16 and the upper rack 17 may be spaced apart from each other, and may slide out in front of the tub 12.

The plurality of

injection arms

13, 14, 15 are arranged in the vertical direction. The plurality of

injection arms

13, 14, and 15 are disposed at the lowermost end and disposed above the low injection arm 13 and the lower injection arm 13 for spraying the washing water from the lower side to the upper side toward the lower rack 16. It is disposed on the upper portion of the upper injection arm 14 for spraying the washing water from the lower side toward the upper rack 17 and the upper side of the washing chamber 12a, which is the upper side of the upper spraying arm 14, and sprays the washing water from the upper side to the lower side. It includes a tower sandstone 15.

The plurality of

injection arms

13, 14, and 15 receive washing water from the washing pump 150 through the plurality of injection

arm connecting passages

18, 19, and 21. The plurality of injection

arm connection passages

18, 19, and 21 may include: a low injection arm connection passage 18 connected to the low injection arm 13, an upper injection arm connection passage 19 connected to the upper injection arm 14; It includes a tower sandstone connection passage 21 connected to the tower sandstone (15).

The sump 100 is disposed below the bottom 12b of the tub 12 to collect the wash water. The sump 100 is connected to a water supply passage 23 through which the washing water supplied from the external water source flows. The water supply passage 23 is provided with a water supply valve 22 that intercepts the washing water supplied from the external water source. When the water supply valve 22 is opened, the washing water supplied from the external water source is introduced into the sump 100 through the water supply passage 23. The water supply passage 23 is provided with a flow meter 27 for measuring the flow rate of the washing water flowing to the sump 100 through the water supply passage 23.

The sump 100 is connected to a drain passage 24 for guiding the stored washing water to the outside of the dishwasher 1. The drain passage 24 is provided with a drain pump 25 for draining the washing water in the sump 100 through the drain passage 24. When the drain pump 25 is driven, the washing water stored in the sump 100 flows out of the case 11 through the drainage passage 24.

The washing pump 150 supplies washing water stored in the sump 100 to at least one of the plurality of

injection arms

13, 14, and 15. The washing pump 150 is connected to the switching valve 130 and the washing water supply passage 180. When the washing pump 150 is driven, the washing water stored in the sump 100 is introduced into the washing pump 150 through the collecting passage 170 and then pumped to the switching valve 130 through the washing water supply passage 180.

The washing pump 150 may heat the washing water transferred to the washing water supply passage 180. The washing pump 150 generates steam by heating the washing water stored therein. The washing pump 150 is connected to the steam hose 190. The steam generated in the washing pump 150 is supplied to the steam nozzle 195 through the steam hose 190.

The washing pump 150 is installed at one side of the sump 100. The washing pump 150 may be any one of a pump known in the art.

The heater 140 is coupled to the lower side of the washing pump 150 to heat the washing water in the washing pump 150. The heater 140 generates hot water by heating the washing water flowing in the washing pump 150 when the washing pump 150 operates. The heater 140 generates steam by heating the washing water stored in the washing pump 150 when the washing pump 150 is stopped.

The hot water generated by the heater 140 is injected into the tub 12 through at least one of the plurality of

injection arms

13, 14, and 15. Steam generated by the heater 140 flows along the steam hose 190 and is discharged into the tub 12 through the steam nozzle 195.

The steam nozzle 195 is provided at the lower end of the door 20 to inject steam into the washing chamber 12a. Steam injected from the steam nozzle 195 is applied to the object to be cleaned in the lower rack 16 and / or the upper rack (17).

The selector valve 130 selectively connects the sump 100 with at least one of the plurality of

injection arms

13, 14, 15. The changeover valve 130 selectively supplies the washing water pumped by the washing pump 150 to at least one of the low injection arm 13, the upper injection arm 14, and the top injection arm 15. The switching valve 130 selectively connects at least one of the washing water supply passage 180 and the plurality of injection

arm connection passages

18, 19, and 21.

The check valve 175 is disposed between the sump 100 and the washing pump 150 to open in the direction of the washing pump 150 at the sump 100. The check valve 175 is opened to allow the washing water to flow from the sump 100 to the washing pump 150 and is closed to prevent steam from flowing from the washing pump 150 to the sump 100. The check valve 175 is rotated and opened at the lower part about the upper part. The check valve 175 is disposed inside the collecting passage 170 or connected between the collecting passage 170 and the washing pump 150 to open and close the collecting passage 170.

Check valve 175 is closed when heater 140 generates steam. The check valve 175 opens when the washing pump 150 operates to flow the washing water, and closes when the washing pump 150 stops and the washing water does not flow. The check valve 175 is opened by the flow pressure of the washing water of the washing pump 150. According to an embodiment, the check valve 175 may be a solenoid valve opened and closed by an electronic signal.

The check valve 175 is formed such that the washing water flows from the washing pump 150 to the sump 100 even in the closed state when the drain pump 25 is operated.

The filter 200 may collect the foreign matter contained in the washing water introduced through the communication hole 12c. The filter 200 may include

meshes

211 and 212 having a plurality of holes formed therein. The filter 200 may be disposed in the water collecting unit 102 of the sump 100 to remove foreign substances from the washing water flowing into the water collecting unit 102, and the filtered washing water may be introduced into the washing pump 150.

The filter 200 includes a first mesh 211 having a plurality of holes and a second mesh 212 having a plurality of holes having a smaller size than the holes of the first mesh 211, and the washing stroke. As a result, the first mesh 211 or the second mesh 212 may rotate to face the pipe flowing into the washing pump 150. Through this, the size of the foreign matter collected by the filter 200 can be adjusted. Detailed description of the filter 200 will be described later with reference to FIG. 3.

The sump 100 according to the embodiment of the present invention includes a sump body 101 coupled to the bottom 12b of the tub 12, a water collecting part 102 through which wash water is collected, and a switching valve 130. The valve coupling part 104 is disposed, and the steam hose support part 103 extending horizontally from the sump body 101 to support the steam hose 190.

The sump body 101 is disposed below the bottom 12b of the tub 12 and coupled to the tub 12. The sump body 101 is formed in a substantially disc shape. The sump body 101 may have an inclined surface that guides the washing water to the water collecting part 102 on an upper surface thereof.

The water collecting part 102 is formed in a cylindrical shape so that the collected wash water is stored. The collecting part 102 corresponds to the communication hole 12c of the tub 12 and is disposed below the communication hole 12c. On the side of the water collecting portion 102, a water supply passage 23 is connected to the water supply pipe (102a) is introduced into the water collecting portion 102 and the wash water supplied from an external water source, and the drainage pump 25 is mounted and the drainage passage 24 ) Is connected to the drain portion 102c through which the washing water in the catchment part 102 flows out, and a collecting pipe 102b through which the washing water in the catchment part 102 flows out.

The valve coupling part 104 is provided with a switching valve 130. The valve coupling part 104 may be part of the switching valve 130. The valve coupling portion 104 is formed in a substantially circular shape. The valve coupling portion 104 has a supply hole 104a communicating with the washing water supply passage 180.

The steam hose support part 103 is formed to extend in the horizontal direction from one end of the sump body 101 to support the steam hose 190.

3 to 5, the sump 100 may further include a blocking wall 106 protruding from the water collecting part 102 toward the filter 200 to cover a portion of the side surface of the filter 200. . The blocking wall 106 is a water collecting pipe of the water collecting part 102 in a state where the filter 200 is disposed such that either the first mesh 211 or the second mesh 212 faces the water collecting pipe 102b. By covering the mesh facing the side facing the 102b, it can be blocked or restricted so that the wash water does not flow through the mesh covered by the blocking wall 106.

The blocking wall 106 may have a wall shape extending in the rotational direction of the filter 200 and extending in the rotational axis direction of the filter.

The blocking wall 106 may have a shape in which a circular pipe pipe is cut in a direction in which the pipe pipe extends.

The blocking wall 106 may be formed such that the vertical length thereof corresponds to the length of the body side surface of the filter 200. For example, the upper end of the blocking wall 106 is formed to be spaced apart from the upper frame 221 of the filter 200 by a predetermined distance, so that the filter 200 is not interfered by the blocking wall 106 when the filter 200 is rotated. Can be. For example, the lower end of the blocking wall 106 is formed to be spaced apart from the lower frame 225 of the filter 200 by a predetermined distance, so that the filter 200 is not interfered by the blocking wall 106 when the filter 200 is rotated. Can be.

The blocking wall 106 may be formed in a shape such that the inner side may contact the outer circumferential surface of the cylinder. Through this, when the filter 200 is inserted into the water collecting part 102 and coupled to the filter rotating body 23 (see FIG. 8), which will be described later, the filter 200 is partially contacted with the blocking wall 106 or disposed to be spaced a predetermined distance apart. The blocking effect on the mesh opposite to the collecting pipe 102b can be increased.

The blocking wall 106 may be provided integrally with the water collecting part 102 of the sump 100. That is, a part of the collecting part 102 may protrude to the inner side surface to form the blocking wall 106.

Alternatively, the blocking wall 106 may be provided to be coupled to the collecting part 102. In this case, the outer wall is formed in a shape corresponding to the inner surface of the collecting portion 102, the blocking wall 106 can be in close contact with the inner surface of the collecting portion 102.

The sump 100 may include a churmari 107 that surrounds the collecting pipe 102b and further protrudes toward the filter 200 from the collecting part 102.

The chumari 107 is provided on the upper side of the collecting pipe 102b in the shape of a rib extending in the horizontal direction longer than the diameter of the collecting pipe 102b, and filters 200 through a through hole formed under the tub 12. Without passing through), the washing water introduced into the water collecting unit 102 may be limited to flow directly into the water collecting pipe 102b.

The chumari 107 may be located at an intermediate point between the upper end and the lower end of the collecting part 102 inside the collecting part 102.

The churmari 107 is disposed between the plurality of protruding ribs 108 formed in the water collecting unit 102, and the position where the churmari 107 is disposed may be guided.

4, 5, and 11, the chumari 107 may be supported at both ends in the horizontal direction by the protruding ribs 108 extending vertically in the water collecting part 102.

For example, the churmarib 107 is provided so that one end thereof extends into the collecting part 102 so as to contact the filter 200 so that only the washing water passing through the mesh of the filter 200 flows into the collecting pipe 102b. Can be. The chumari 107 may extend into the water collecting part 102 such that the inner end thereof contacts the filter frame 220 of the filter 200. Through this, the foreign matter of the washing water flowing into the washing pump 150 can be effectively limited, but the flow rate of the washing water flowing into the washing pump 150 may be less.

For example, the churmari 107 may be extended into the collecting part 102 so that one end is spaced apart from the filter 200 by a predetermined distance. In this case, some of the washing water that has not passed through the filter 200 may directly flow into the collection pipe 102b. Through this, the flow rate of the washing water flowing into the washing pump 150 may be large, but foreign substances may be present in the washing water flowing into the washing pump 150.

The chumari 107 configured as described above includes a washing pump 150 flowing through the filter 200 and flowing into the washing pump 150 without passing through the filter 200 and the flow rate of the washing water flowing into the washing pump 150. The flow rate flowing into the) can be adjusted, so that the injection of the washing water through the plurality of

injection arms

13, 14 and 15 can be effectively performed.

In addition, the churmari 107 may support the filter 200 inwardly together with the blocking wall 106 to limit the position of the filter 200 in the water collecting part 102. Through this, when the filter 200 is rotated or when the filter 200 is moved by the flow of the washing water, the filter 200 may be positioned at the original position by the churmari 107 and the blocking wall 106.

The churmari 107 and the protruding rib 108 configured as described above may adjust or block the flow rate of the washing water flowing directly into the collection pipe 102b without passing through the filter 200. That is, the barrier is formed on the upper side of the collecting pipe 102b by the chumari 107, the barrier is formed on both sides of the collecting pipe 102b by the protruding rib 108, and flows into the collecting part 102. It is possible to limit the washing water flowing toward the collecting pipe 102b without passing through the filter 200.

As a result, the churmari 107 and the protruding rib 108 flow directly into the collecting pipe 102b without passing through the filter 200 and the amount of washing water flowing through the filter 200 and into the collecting pipe 102b. By adjusting the ratio of the amount of washing water to be washed, the washing effect can be improved.

6 and 7, the washing pump 150 may be installed at one side of the sump 100.

The washing pump 150 may be connected to the collecting pipe 102b of the sump 100. The washing pump 150 may introduce washing water from the water collecting unit 102 through the water collecting pipe 102b. The washing pump 150 may include a washing water inlet pipe connected to the collecting pipe 102b.

The washing pump 150 may include a washing water outlet pipe connected to the washing water supply passage 180. The washing pump 150 may be connected to the switching valve 130 through the washing water outlet pipe and the washing water supply passage 180.

The washing pump 150 may include a steam discharge pipe connected to the steam hose 190. The washing pump 150 may be connected to the steam nozzle 195 through the steam discharge pipe and the steam hose 190.

Due to the structure described above, the steam hose 190 may be disposed to be inclined upwardly or horizontally from the washing pump 150 to the steam hose 190 based on the steam flow direction. That is, the steam hose 190 may be disposed such that there is no portion facing downward based on the steam flow direction.

The filter 200 may be provided in a cylindrical shape as a whole, and an internal space in which the washing water is accommodated may be formed.

The filter 200 may include a head part partially protruding into the tub 12 and into which the washing water flows along the bottom 12b of the tub 12. The filter 200 may include a body part provided with a plurality of through-hole meshes to filter foreign substances in the washing water.

The filter 200 may be maintained in shape by the filter frame 220.

The filter frame 220 may include an upper frame 221 which forms an upper end of the body and has a disc shape in which a central hole is formed. The filter frame 220 may include a main frame 222 extending downward from both sides of the upper frame 221 facing each other. The filter frame 220 may include one or more subframes 223 extending downward from the upper frame 221 and thinner than the main frame 222. The filter frame 220 may include a plurality of bridge frames 224 connecting the neighboring main frame 222 and the subframe 223 in a band shape having a horizontal or predetermined angle with the upper frame 221. have. The filter frame 220 may include a lower frame 225 forming a lower end of the body and having a circular band shape.

The lower frame 225 may include a pair of coupling protrusions 2251 to be coupled to the filter rotating body 231 to be described later. The lower frame 225 may be detachably coupled to the filter rotating body 231 described later.

The filter frame 220 may include a head frame 226 forming an upper end of the filter 200 on the upper side of the body.

The headframe 226 is formed in a circular band shape and may include a headframe body 2221 in which the handle 2262 is disposed. The headframe 226 may include a headframe bridge 2263 connecting the headframe body 2221 and the upper frame 221.

The filter frame 220 may include a head suction hole 227 disposed between the head and the body of the filter 200 and partially inserted into the central hole of the upper frame 221.

The head suction opening 227 is provided in a shape including a horizontal plate parallel to the upper frame 221 and a plurality of vertical plates crossing the horizontal plate to be a passage through which the washing water flows from the outside of the filter 200. Can be.

The filter 200 may include a first mesh 211 having a plurality of holes formed in the body portion and a second mesh having a plurality of holes having a smaller size than the holes of the first mesh 211. The filter 0 may be rotatably provided so that the first mesh 211 or the second mesh may face the collecting pipe 102b according to the washing stroke.

The filter 200 may rotate about a rotation axis X1 extending vertically.

The first mesh 211 may have a thin plate shape in which a plurality of through holes are formed at predetermined intervals. The first mesh 211 may be provided with a polygonal or circular through-hole.

9, the first mesh 211 may have a square through-hole. For example, the first mesh 211 may be formed to have a length L1 of a square through hole of 0.57 mm to 0.23 mm.

The first mesh 211 may constitute at least a part of the side surface of the filter 200. The first mesh 211 may be disposed between the mainframe 222 and the subframe 223.

The second mesh 212 may have a thin plate shape in which a plurality of through holes are formed at regular intervals. The second mesh 212 may be provided with a polygonal or circular through-hole.

9, the second mesh 212 may have a square through-hole. The second mesh 212 may be formed such that the length L2 of one side of the through hole having a square is smaller than the length L1 of the one side of the through hole of the first mesh 211. For example, the length L2 of one side of the through hole that is a square of the second mesh 212 may be 0.13 mm to 0.23 mm.

The second mesh 212 may constitute at least a portion of the side surface of the filter 200. The second mesh 212 may be disposed between the mainframe 222 and the subframe 223.

In the filter 200, the first mesh 211 and the second mesh 212 may constitute at least a portion of the side surface of the filter 200 at a constant area ratio. The filter 200 may be covered by the first mesh 211 and the second mesh 212 with the rest of the side surface of the filter 200 not covered by the filter frame 220.

For example, the first mesh 211 and the second mesh 212 may form portions of the side surfaces of the filter 200 while having an area ratio of 2: 1 to 1: 2.

For example, the first mesh 211 connects the main frame 222 and the subframe 223 in an area between 0 degrees (reference point) and 180 degrees based on the rotation angle of the filter 200. Can be. For example, the second mesh 212 may connect between the main frame 222 and the subframe 223 in a region between 180 degrees and 360 degrees based on the rotation angle of the filter.

For example, the first mesh 211 may be provided with a plate formed in a predetermined thickness in the shape of the outer circumferential surface of the cylinder in a shape bisected in the longitudinal direction of the cylinder. The first mesh 211 may be provided in close contact with the filter frame 220 inside the filter frame 220.

In this case, the first mesh 211 of FIG. 9 may be provided integrally connected to one. The above description about the first mesh 211 may be equally applied to the second mesh 212.

The dishwasher 1 may further include a filter driver 230 providing a rotational force to the filter 200.

The filter driver 230 may include a filter rotating body 231 disposed on the bottom surface of the water collecting unit 102 to be detachably coupled to the filter 200. The filter driver 230 may include a driving motor 232 that provides a rotational force to the filter rotating body 231. The filter driver 230 may include a cam 233 connected to the rotation shaft of the filter 200 to rotate together with the filter 200. The filter driver 230 may include a rotation sensor that detects rotation of the cam 233 to generate a signal, and provides the generated signal to the driving motor 232.

The rotation sensor may detect a rotation angle and / or a rotation speed of the cam 233.

For example, the rotation sensor may be configured as a switch that is in contact with the cam 233 is turned off when the cam 233 rotates a predetermined angle. Alternatively, the rotation sensor may be spaced apart from the cam 233 by a predetermined distance to detect the rotation of the cam 233 using a sound wave or a beam at a predetermined wavelength.

The filter driving unit 230 is a switch 234 for providing a control signal to the drive motor 232 when the cam is rotated, the portion in contact with the cam 233 is linearly moved on and off as the cam rotates. ) May be included.

The filter rotator 231 may include a circular band-shaped edge, a cylindrical center of rotation extending vertically in the center, and a bridge connecting the edge and the center of rotation.

The filter rotator 231 may include a coupling groove for inserting and coupling the coupling protrusion 2251 of the filter 200 to an edge thereof, such that the filter 200 and the filter rotator 231 may be detachably coupled to each other. .

The filter 200 may be coupled to the filter rotator 231 by a user holding the handle 2262 and inserting the filter 200 downward from the upper side of the filter rotator 231 and rotating the filter at an angle. The filter 200 may be easily separated from the filter rotating body 231 by rotating the filter 200 at an angle in a direction opposite to that when the user grasps the handle 2262.

The filter rotator 231 is formed such that the diameter of the rim corresponds to the inner surface of the lower end of the water collecting part 102 so that the washing water in the filter 200 does not flow out through the center hole of the lower frame 225. Can be discharged laterally through the meshes.

The filter rotator 231 may be rotatably installed at the lower side of the water collecting unit 102.

Referring to FIG. 10, the rotation center of the filter rotating body 231 may be inserted into a coupling hole formed at the lower end of the collecting part 102 to be coupled to the driving motor 232. The rotation center of the filter rotator 231 may protrude a predetermined length to the outside of the sump 100 through a coupling hole at the bottom of the collecting part 102, and may be coupled to the cam 233 and the driving motor 232.

The driving motor 232 may be disposed below the collecting part 102 outside the sump 100 and may be connected to the driving part filter rotating body 231.

Referring to FIG. 10, according to an embodiment of the present invention, the driving motor 232 may be rotated by the same rotation axis X1 as the filter 200 and the filter rotating body 231. Through this, the filter 200 may be immediately and efficiently rotated by the rotational force of the driving motor 232.

The cam 233 is a part that rotates about a rotation axis, and is formed in an asymmetrical shape to change the rotational motion into a linear motion. The cam 233 may be provided with one or more cam protrusions protruding laterally from the cylindrical body at the center thereof, and thus, a distance from the center of rotation to the side may be provided to be not constant.

The cam 233 is connected to the filter rotator 231 and may rotate at the same angular speed about the same rotation axis X1 as the filter 200.

The cam 233 may be disposed at the lower end of the collecting part 102 outside the sump 100. The cam 233 may be provided with a cam protrusion to correspond to the positions of the first mesh 211 and the second mesh 212 of the filter 200.

For example, the cam 233 has a first cam protrusion of the cam 233 when the filter 200 is disposed so that the first mesh 211 faces the water collecting pipe 102b. It may be provided to press. The cam 233 may be provided so that the second cam protrusion of the cam 233 presses the input end of the switch 234 when the filter 200 is disposed so that the second mesh 212 faces the water collection pipe. .

The switch 234 may be turned on or off by a horizontal input. The switch 234 is arranged such that the input end is in contact with the cam 233 so that the input end may move in the horizontal direction while the cam 233 rotates.

For example, the switch 234 may be configured such that when the cam 233 rotates and the cam protrusion presses an input terminal, the switch 234 is turned on and provides a control signal to the driving motor 232. In this case, the driving motor 232 may stop when acquiring the control signal from the switch 234. Through this, the filter 200 may be disposed such that the first mesh 211 or the second mesh 212 faces the collection pipe 102b.

Alternatively, the switch 234 may be configured to stop the control signal provided to the driving motor 232 when the cam 233 rotates and the cam protrusion presses the input terminal. In this case, the driving motor 232 may stop when the control signal received from the switch 234 is stopped.

Referring to the operation of the filter driving unit 230 configured as described above, by receiving a signal from the control unit (not shown) of the dishwasher 1, the drive motor 232 starts the operation, the filter by the drive motor 232 The rotation of the 200 and the filter rotator 231 and the cam 233 may also rotate together.

When the first mesh 211 or the second mesh 212 of the filter 200 is disposed to face the collecting pipe 102b, the first cam protrusion or the second cam protrusion of the cam 233 is correspondingly switched by the switch ( By pressing the input terminal of 234, the switch 234 is turned on or off.

When the switch 234 is turned on or off and a control signal is transmitted to the driving motor 232, the driving motor 232 is stopped and the filter 200 is connected to the first mesh 211 or the second mesh 212. It can be stopped in a state arranged to face the collecting pipe (102b). When the switch 234 is turned on or off, the control signal transmitted to the driving motor 232 may include stopping the signal transmitted by the switch 234. That is, the switch 234 transmits a signal while the driving motor 232 is driving and stops the signal as a control signal.

The filter driver 230 may further include a sealing member 235 disposed between the coupling hole of the water collecting unit 102 and the filter rotating body 231 to prevent leakage through the coupling hole.

The sealing member 235 may be disposed between the lower end of the coupling hole and the filter rotating body 231.

FIG. 11 is a cross-sectional view taken along line BB ′ of FIG. 6, and FIG. 12 is a cross-sectional view taken along line AA ′ of FIG. 7.

Hereinafter, with reference to FIGS. 11 and 12 will be described the operation and effect of the dish washer according to the present embodiment.

The dishwasher 1 according to the present embodiment may perform a plurality of washing strokes. The plurality of washing strokes may include a first stroke and a second stroke in which the amount of foreign matter contained in the washing water of the sump 100 is smaller than the first stroke.

For example, the first stroke may be a preliminary washing stroke for washing by spraying the washing water onto the dishes in the washing chamber 12a. The preliminary washing stroke may be defined as a washing stroke to remove the relatively large foreign matter attached to the dishware prior to the washing stroke.

For example, the second stroke may be the main washing stroke in which washing water is sprayed on the dishes in the washing chamber 12a after the preliminary washing stroke.

The amount of foreign matter in the wash water in the tub 12 in the present washing stroke may be less than the amount of the foreign matter in the wash water in the tub 12 in the preliminary washing stroke. Alternatively, the particle size of the foreign matter in the wash water in the tub 12 in the present washing stroke may be smaller than the particle size of the foreign matter cloth in the wash water in the tub 12 in the pre-cleaning stroke. This is because this washing stroke is a stroke for separating foreign matters of relatively small size that are not separated from the dishes in the preliminary washing stroke.

11 is a cross-sectional view of a state in which the first mesh of the filter 200 at the first stroke (preliminary washing stroke) faces the collecting pipe 102b.

Referring to FIG. 11, the filter 200 is arranged such that the first mesh 211 faces the water collection pipe 102b during the first stroke (preliminary washing stroke), so that the foreign matters of the washing water introduced into the filter 200 are removed. It is possible to remove foreign substances having a relatively large particle size. Through this, during the preliminary washing operation in which the size of the foreign matter is large and / or the amount of the foreign matter is large, it is possible to prevent the clogging phenomenon in which the filter is clogged by the foreign matter.

The filter 200 is disposed so that the second mesh 212 faces the water collection pipe 102b during the second stroke (this washing stroke), so that the particle size is relatively small in the foreign matter of the washing water introduced into the filter 200. Foreign material can be removed. Through this, the filtering effect of the filter 200 may be enhanced.

Clogging phenomenon refers to a phenomenon in which a hole formed in the filter is clogged by foreign matter, also called clogging phenomenon. The size of the foreign matter that can be filtered varies depending on the size of the mesh. If the particle size of the foreign matter is larger than the size of the opening of the filter mesh, the filter cannot pass through the filter and remains in the filter. When the filtered foreign matter covers a certain portion or more of the mesh, the amount of flow passing through the filter is drastically reduced, which is called clogging or clogging.

In the normal state, the filter 200 removes foreign substances in the washing water and passes the washing water so that circulation occurs, and the washing water passes through the filter 200 and the pressure may be reduced to some extent. When clogging has occurred, not only the foreign matter in the washing water but also the washing water does not pass through the filter 200, and the washing water flowing through the filter 200 into the washing pump 150 through the collecting pipe 102b is reduced. In this case, the washing water sprayed from the

injection arms

13, 14, 15 of the dishwasher 1 is reduced, thereby reducing the washing effect of the dishes.

The washing pump 150 pressurizes the washing water and pumps it into the injection nozzle. When the washing water flowing into the washing pump 150 is less than a predetermined level, the washing pump 150 is idle, and thus the washing pump 150 is It may be damaged and noise may occur in the washing pump 150. In addition, since the washing pump 150 is idling and fatigue may accumulate, it is necessary to prevent idling of the washing pump 150.

The dishwasher 1 configured as described above is arranged to filter the mesh (first mesh) having a large through hole toward the water collecting pipe 102b in a stroke having a large particle size of the foreign matter, and in a stroke having a small particle size of the foreign substance. By arranging and filtering the mesh (second mesh) having a small size of the pore facing the collection pipe 102b, clogging of the filter by foreign matter can be prevented. In addition, by selectively changing the mesh used for filtering, the filter effect can be adjusted according to the amount of foreign matter in the tub. As a result, the washing water can be circulated smoothly to improve the washing effect.

Although not shown, the filter 200 may further include a third mesh having a plurality of through holes formed in a size smaller than the through holes of the second mesh 212. The filter 200 may configure at least a portion of the side surfaces of the filter 200 at a constant area ratio of the first mesh 211, the second mesh 212, and the third mesh.

For example, the filter 200 divides the sides of the filter 200 into three equal parts at intervals of 120 degrees on the basis of the rotation angle of the filter 200, and the first mesh 211 is disposed in the side region between 0 and 120 degrees. ), A second mesh 212 may be provided in the side region between 120 degrees and 240 degrees, and a third mesh may be provided in the side region between 240 degrees and 360 degrees.

In this way, the filter 200 may be disposed such that the third mesh faces the collection pipe 102b during the third stroke after the second stroke, and thus remove foreign substances having a finer size than when using the second mesh. .

The dishwasher 1 configured as described above uses a filter that can change the mesh according to the washing stroke, thereby preventing clogging caused by foreign substances and increasing the effect of removing foreign substances, thereby shortening the washing time and improving the washing effect. There is an advantage to this.

12 is a cross-sectional view for explaining how the wash water in the tub 12 flows into the water collecting unit.

Referring to FIG. 12, the washing water in the tub 12 may flow into the head suction opening 227 of the filter 200 along the inclined surface below the tub 12. In addition, a part of the washing water in the tub 12 may pass through the through hole provided at the bottom of the tub 12 to enter the water collecting part 102 on the upper side of the sump 100, in which case the filter 200 The washing water that has not passed may flow into the water collecting unit 102.

The washing water introduced into the filter 200 may be discharged through the mesh to the water collecting pipe 102b. Foreign matter in the wash water can be removed by the mesh.

The washing water that does not pass through the filter 200 may move downward through the water collecting part 102 to be in contact with the churmarib 107. Some of the washing water that does not pass through the filter 200 may be introduced into the collection pipe 102b without passing through the filter 200 through the space between the churmari 107 and the filter 200. Some of the washing water introduced directly into the water collecting part 102 may be introduced into the filter 200 through a mesh by a pressure difference between the inside and the outside of the filter 200. The washing water introduced into the filter 200 through the mesh may be discharged to the water collecting pipe 102b through the mesh again.

On the other hand, it may be limited by the blocking wall 106 so that the wash water does not flow through the mesh facing the surface facing the collection pipe (102b). Through this, it is possible to prevent the clogging phenomenon that the mesh is clogged through the washing water with a lot of foreign matter through the small through-hole mesh.

Second embodiment

In the configuration of the second embodiment, the same or almost the same configuration as in the first embodiment will be described with the same reference numerals, and hereinafter, description will be mainly focused on different parts from the first embodiment.

According to another embodiment of the present invention, the driving motor 232 ′ may rotate about the second rotation axis X2 different from the first rotation axis X1 of the filter 200. The driving motor 232 ′ may be disposed at one side of the collecting part 102 of the sump 100 so that the driving part faces downward.

The driving unit of the driving motor 232 ′ may be connected to the first rotating shaft X1 of the filter 200 by the connecting device 236 to transmit a rotational force. The driving unit of the driving motor 232 ′ may be connected to the cam 233 and the connecting device 236.

The connecting device 236 may be configured of a gear, a chain, or a belt to transmit the rotational motion of the driving motor 232 'to another member.

The dishwasher configured as described above may reduce volume in the vertical direction than when the driving motor is directly connected to the filter. That is, the driving motor 232 may be disposed in an empty space on the side of the water collecting part 102 in which other members of the dishwasher are not located, thereby reducing the volume occupied by the plurality of dishwasher members.

In addition, since the rotation ratio of the driving motor 232 'and the filter 200 may be configured differently, even when the driving force of the driving motor 232' is small, the torque may be increased to rotate the filter 200.

Although the above has been illustrated and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, but in the art to which the invention pertains without departing from the spirit of the invention as 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.

[Description of the code]

1: dishwasher 11: case

12: Tub 16, 17: Rack

20: door 100: sump

130: switching valve 23: water supply passage

24: drainage channel 26: filter

13, 14, 15: plural jet arms 18, 19, 21: plural jet arms

140: heater 150: washing pump

170: catchment passage 175: check valve

180: washing water supply passage 190: steam hose

195: steam nozzle 200: filter

220: filter frame 230: filter driving unit

Claims

A tub forming a washing chamber in which a washing object is accommodated;

A sump disposed below the tub, the sump including a water collecting part for collecting wash water and a water collecting pipe provided on one side of the water collecting part;

A washing pump through which the washing water is introduced from the collecting portion through the collecting pipe; And

A second mesh disposed in the water collecting unit to collect foreign substances included in the washing water flowing into the water collecting unit, and a plurality of through holes formed to have a smaller size than the through holes of the first mesh and the first mesh; And a filter including a mesh, the filter being rotatably disposed so that the first mesh or the second mesh is directed toward the water collecting tube.
The method of claim 1,

The filter,

Rotate around the axis of rotation extending up and down,

And the first mesh and the second mesh constitute at least a portion of the side surface of the filter at a constant area ratio.
The method of claim 2,

And a filter driving unit disposed on a bottom surface of the water collecting unit, the filter driving unit including a filter rotating body detachably coupled to the filter and a driving motor providing a rotational force to the filter rotating body.
The method of claim 3, wherein

The filter driving unit,

A cam connected to the rotating shaft of the filter and rotating together with the filter;

And a rotation sensor for detecting a rotation of the cam to generate a signal and providing the generated signal to the driving motor.
The method of claim 4, wherein

The rotation sensor,

And a switch for linearly moving a portion in contact with the cam as the cam rotates on and off, and providing a control signal to the drive motor when the cam is turned on and off.
The method of claim 4, wherein

The drive motor rotates about the first rotation axis,

The filter rotates about a second axis of rotation,

The filter driving unit,

And a connection device for transmitting the rotational force of the drive motor to the filter.
The method of claim 2,

The washing stroke,

A first stroke and a second stroke in which the amount of foreign matter contained in the wash water of the sump is smaller than the first stroke,

The filter,

And the first mesh is disposed to face the water collecting pipe during the first stroke, and the second mesh is disposed to face the water collecting pipe during the second stroke.
The method of claim 2,

The sump,

And a blocking wall further protruding from the water collecting portion toward the filter to cover a portion of the side surface of the filter.
The method of claim 8,

The blocking wall,

Rotating direction of the filter so as to cover the mesh facing the side facing the water collecting pipe of the water collecting portion, with the filter disposed so that either the first mesh or the second mesh faces the water collecting pipe. Extending in the direction of the rotation axis of the filter.
The method of claim 8,

The sump,

And a chu-rib that surrounds the water collecting pipe and further protrudes toward the filter from the water collecting unit.
The method of claim 1,

The filter,

A third mesh having a plurality of through holes formed in a size smaller than the through holes of the second mesh,

And the first mesh, the second mesh, and the third mesh constitute at least a portion of a side of the filter at a constant area ratio.