Patent Grant
11564553
This application is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2019-0144171, filed on Nov. 12, 2019 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
The disclosure relates to a dishwasher, and more specifically, to a sump structure disposed at a lower portion of the dishwasher.
A dishwasher is a device that automatically cleans food debris from dishware using detergent and washing water.
The dishwasher includes a main body, a washing chamber formed by a tub disposed inside the main body, a storage container disposed inside the washing chamber to accommodate dishware, and a spray unit provided to spray washing water into the storage container.
The storage container is generally provided in two or three stage, and a plurality of the spray units may be arranged to correspond to respective storage containers to spray the washing water to an area where each storage container is disposed.
The dishwasher may include a sump formed at a lower end of a washing chamber such that washing water is collected in the sump.
The conventional dishwasher may include a heater that is separately provided from a sump and configured to heat water flowing through a water supply pipe. When the high-temperature washing water heated by the heater is supplied to the sump, the water may be filtered by a filter and then pass through a circulation pump. The heated washing water passing through the circulation pump may more easily wash dishware through a spray nozzle. The heated washing water may decompose dirt or sterilize microorganisms inside the sump or filter. However, the heater separately provided from the sump may cause heat loss. When the separate heater is coupled to a pump, pressure loss of the pump may occur, and the energy efficiency of the pump may be lowered.
According to an aspect of the disclosure, there is provided a dishwasher including: a tub forming a washing chamber; and a sump assembly provided at a lower side of the washing chamber and configured to store washing water in the washing chamber, wherein the sump assembly includes: a sump housing having a water storage chamber storing the washing water and a sidewall portion forming the water storage chamber; and a heater provided on the sidewall portion to apply heat to the washing water stored in the sump assembly.
The heater may include a planar heating element.
The heater may be provided by forming the planar heating element in a cylindrical shape.
The sump housing may include: an upper sump housing arranged at an upper end portion of the water storage chamber, and including an inclined portion configured to guide the washing water into the sump assembly and an opening communicating the washing chamber with the water storage chamber; a lower sump housing forming a bottom portion of the water storage chamber; and an intermediate sump housing connecting the upper sump housing to the lower sump housing, and forming the sidewall portion.
The sump assembly may include an upper sealing member arranged at a connecting portion between the upper sump housing and the intermediate sump housing; and a lower sealing member arranged at a connecting portion between the intermediate sump housing and the lower sump housing.
The upper sump housing may include an upper groove in which the upper sealing member is accommodated, the lower sump housing may include a lower groove in which the lower sealing member is accommodated, and both ends of the intermediate sump housing may be seated in the upper groove and the lower groove.
The upper sump housing may include a first coupling portion protruding from a body of the upper sump housing, and the lower sump housing may include a second coupling portion protruding from a body of the lower sump housing to correspond to the first coupling portion, and the first coupling portion and the second coupling portion may be fastened to each other through a coupling member so that the upper sump housing, the intermediate sump housing, and the lower sump housing are fixed.
The dishwasher may further include a spray unit configured to spray washing water to wash dishware, wherein the sump assembly may further include: a fine filter provided at an upper side of the sump housing, and having an opening communicating the washing chamber with the water storage chamber; a coarse filter provided in a cylindrical shape and mounted in the opening; a micro filter mounted inside the water storage chamber to form a dirt collecting chamber for collecting dirt together with a part of the bottom portion of the sump housing, and having a cylindrical shape; and a circulation chamber formed by an outer side of the micro filter and the sidewall portion, and provided to circulate the washing water to the spray unit, wherein the heater heats the washing water of the circulation chamber.
The sump assembly may include the intermediate sump housing that is eccentrically disposed with respect to the micro filter.
The sump assembly may further include a sensor configured to measure a temperature of the washing water in the water storage chamber, and a controller configured to adjust a temperature of the heater.
The micro filter may include a filter net configured to filter out dirt and a filter frame provided in a cylindrical shape and supporting the filter net, the filter frame may have one end accommodated in a micro filter fitting groove provided in the lower sump housing and an other end provided to come in contact with and communicate with the opening of the fine filter, and the micro filter may have a vertical length longer than a vertical length of the intermediate sump housing.
A ratio of a diameter of the micro filter to a diameter of the intermediate sump housing may have a value in a range of 0.5 to 0.8.
According to another aspect of the disclosure, there is provided a sump assembly for storing washing water of a dishwasher, the sump assembly including: a water storage chamber configured to store washing water; a first sump housing arranged at an upper end portion of the water storage chamber, and including an inclined portion configured to guide the washing water into the sump assembly and an opening communicating the washing chamber with the water storage chamber; a second sump housing forming a bottom portion of the water storage chamber; and a third sump housing connecting the first sump housing to the second sump housing, and forming a sidewall portion of the water storage chamber, wherein the third sump housing includes a planar heating element.
The third sump housing may be provided by forming the planar heating element in a cylindrical shape.
The sump assembly may further include: an upper sealing member arranged at a connecting portion between the first sump housing and the third sump housing; and a lower sealing member arranged at a connecting portion between the third sump housing and the second sump housing to prevent washing water from leaking to the outside.
The first sump housing may include an upper groove in which the upper sealing member is accommodated, the second sump housing may include a lower groove in which the lower sealing member is accommodated, and both ends of the third sump housing may be seated in the upper groove and the lower groove, respectively, while pressing the upper sealing member and the lower sealing member.
The first sump housing may include a first coupling portion protruding from a body of the first sump housing, and the second sump housing may include a second coupling portion protruding from a body of the second sump housing to correspond to the first coupling portion, and the first coupling portion and the second coupling portion may be fastened to each other through a coupling member so that the first sump housing, the second sump housing, and the third sump housing are fixed.
The sump assembly may further include: a fine filter provided at an upper side of the first sump housing, and having an opening communicating the washing chamber with the water storage chamber; a coarse filter provided in a cylindrical shape and mounted in the opening; and a micro filter mounted inside the water storage chamber to form a dirt collecting chamber for collecting dirt together with a part of the bottom portion of the second sump housing, and having a cylindrical shape; and a circulation chamber formed by an outer side of the micro filter and the sidewall portion, and provided to circulate the washing water to a spray unit configured to spray washing water such that the dishwasher washes dishware, wherein the planar heating element may heat the washing water of the circulation chamber.
The third sump housing may be eccentrically disposed with respect to the micro filter.
The sump assembly may further include a sensor configured to measure a temperature of the washing water in the water storage chamber, and a controller configured to adjust a temperature of the heater.
Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
These and/or other aspects of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
The embodiments set forth herein and illustrated in the configuration of the disclosure are only the most preferred embodiments and are not representative of the full the technical spirit of the disclosure, so it should be understood that they may be replaced with various equivalents and modifications at the time of the disclosure.
Throughout the drawings, like reference numerals refer to like parts or components.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to restrict and/or limit the disclosure. It is to be understood that the singular forms “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise. It will be further understood that the terms “include”, “comprise” and/or “have” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The terms including ordinal numbers like “first” and “second” may be used to explain various components, but the components are not limited by the terms. The terms are only for the purpose of distinguishing a component from another. Thus, a first element, component, area, layer or section discussed below could be termed a second element, component, area, layer or section without departing from the teachings of the disclosure. Descriptions shall be understood as to include any and all combinations of one or more of the associated listed items when the items are described by using the conjunctive term “˜and/or˜,” or the like.
Meanwhile, the terms “front”, “rear”, “upper”, “lower”, “top”, and “bottom” as herein used are defined with respect to the drawings, but the terms may not restrict the shape and position of the respective components.
Therefore, it is an object of the disclosure to provide a dishwasher having a reduced overall volume by minimizing the volume of a sump.
It is another object of the disclosure to provide a dishwasher including a sump having an improved structure.
It is another object of the disclosure to provide a dishwasher in which a part of the sump forms a heater so that the thermal efficiency of the dishwasher is increased and pressure loss of a pump is reduced.
Specifically, referring to
Hereinafter, embodiments of the disclosure will be described in detail with reference to the accompanying drawings.
Referring to
The dishwasher 1 may further include a door 11 provided to open and close the opening portion 12a of the tub 12. The door 11 may be installed in the main body 10 to open and close the opening portion 12a of the tub 12. The door 11 may be rotatably installed on the main body 10.
The dishwasher 1 may further include a storage container provided inside the tub 12 to accommodate dishware.
The storage container may include a plurality of baskets 51, 52 and 53. The plurality of baskets 51, 52 and 53 may accommodate relatively large dishware, However, the types of dishware stored in the plurality of baskets 51, 52, and 53 are not limited thereto. That is, not only dishware having a relatively large volume but also dishware having a relatively small volume may be accommodated in the plurality of baskets 51, 52, and 53.
The plurality of baskets 51, 52, and 53 include an intermediate basket 52 located at a middle portion in the height direction of the dishwasher 1, and a lower basket 51 located at a lower portion in the height direction of the dishwasher 1. The intermediate basket 52 may be provided to be supported by an intermediate guide rack 13a, and the lower basket 51 may be provided to be supported by a lower guide rack 13b. The intermediate guide rack 13a and the lower guide rack 13b may be installed on side surfaces 12d of the tub 12 so as to be slidable toward the opening portion 12a of the tub 12. The side surfaces 12d of the tub 12 may be a concept including an inner surface of a right wall of the tub 12 and an inner surface of a left wall of the tub 12.
The storage container may include an upper basket 53 positioned at an upper portion in the height direction of the dishwasher 1. The upper basket 53 may be provided in the form of a rack assembly to accommodate dishware having a relatively small volume. Preferably, cooking utensils or cutlery, such as ladles, knives, and flippers, may be accommodated in the upper basket 53. In addition, a small cup, such as an espresso cup, may be accommodated in the rack assembly. However, the types of dishware accommodated in the upper basket 53 are not limited thereto.
In addition, the disclosure is not limited to the above, and the upper basket 53 may be omitted depending on the size of the tub 12. Therefore, the storage container may be implemented only with the intermediate basket 52 and the lower basket 51.
Referring to
The washing room C is a space in which dishware mounted on the baskets 51, 52, and 53 are washed by the washing water and dried. The washing chamber C may be defined as an inner space of the tub 12 formed by the side surfaces 12d of the tub 12, the front and rear surfaces of the tub 12, a bottom surface 12b of the tub 12, and the sump assembly 100 communicating with the bottom surface 12b.
The dishwasher 1 may further include spray units 41, 42 and 43 provided to spray washing water. The spray units 41, 42 and 43 include a first spray unit 41 disposed below the lower basket 51 in the height direction of the dishwasher 1, a second spray unit 42 disposed below the intermediate basket 52 in the height direction of the dishwasher 1, and a third spray unit 43 disposed above the upper basket 53 in the height direction of the dishwasher 1.
The first spray unit 41 may be provided to be rotatable about a rotation shaft 41a, the second spray unit 42 may be provided to be rotatable about a rotation shaft 42a, and the third spray unit 43 may be provided to be rotatable about a rotation shaft 43a.
However, the disclosure is not limited to the embodiment, and the first spray unit 41 may be provided to be fixed to one side of the bottom surface 12b unlike the second spray unit 42 and the third spray unit 43. In this case, the first spray unit 41 is provided to spray the washing water in an approximately horizontal direction by a fixed nozzle, and the washing water sprayed in the horizontal direction from the nozzle of the first spray unit 41 may be deflected by a direction change assembly disposed inside the washing chamber C and thus proceed upwards. The direction change assembly may be installed on a rail by a holder, and may be provided to be translatable along the rail.
The third spray unit 43 may spray washing water toward the dishware stored in the upper basket 53, the intermediate basket 52, and the lower basket 51, and the second spray unit 42 may spray washing water toward the dishware stored in the intermediate basket 52 and the upper basket 53.
Unlike the second spray unit 42 and the third spray unit 43, the first spray unit 41 may be disposed on the bottom surface 12b of the tub 12. In detail, the first spray unit 41 may be provided to be fixed to the sump assembly 100.
The dishwasher 1 may include a circulation pump 30 that pumps water stored in the sump assembly 100 to the spray units 41, 42, and 43. The washing water pumped by the circulation pump 30 may flow to an alternating device 80 connected to the circulation pump 30 such that the washing water may be supplied to the first spray unit 41 or may be moved upward by the duct 90 and supplied to the second spray unit 42 or the third spray unit 43.
As described above, the washing water stored in the sump assembly 100 or the washing water flowing from the outside into the dishwasher 1 may be caused to flow to the alternating device 80 by the circulation pump 30.
Referring to
The alternating device 80 may selectively provide washing water to at least one of the connector 81 and the duct 90.
At least a portion of the connector 81 and the passage 62 may be disposed in a machine room L provided below the washing chamber C. That is, at least a portion of the connector 81 and the passage 62 may be disposed below the bottom surface 12b of the tub 12 in the height direction of the dishwasher 1. The washing water may flow to the first spray unit 41 and the duct 90 disposed inside the washing chamber C through the connector 81 and the passage 62. The washing water may flow to the second spray unit 42 and the third spray unit 43 through the duct 90.
Referring to
In the machine room L, the circulation pump 30, the alternating device 80, and the sump assembly 100 described above may be disposed.
The dishwasher 1 may include a drain hose 20 provided to drain the washing water remaining in the tub 12.
The drain hose 20 is connected to the sump assembly 100 to drain the washing water stored in the sump assembly 100 to the outside of the dishwasher 1.
As described above, the washing water collected in the sump assembly 100 may be filtered a filter inside the sump assembly, and then circulated back into the washing chamber C by the circulation pump 30.
However, referring to
The tub 12 may include a drain pump 40 that pumps the washing water such that the washing water collected in the tub 12 is drained to the outside of the tub 12 through the drain hose 20.
When the drainage process starts, the drain pump 40 is driven such that the washing water collected in the tub 12 may be moved to the outside of the dishwasher 1 through the drain hose 20.
The sump assembly 100 is provided below the washing chamber C to store washing water. A bottom surface 13 of the washing chamber C is inclined to face the sump assembly 100 so that the washing water may be collected in the sump assembly 100 along the bottom surface 13.
Referring to
Moreover, the plurality of filters include a coarse filter 110 having a large through hole, a fine filter 120 having a medium through hole, and a micro filter 130 having a small-size through hole. In particular, the micro filter 130 forms a drain chamber 151b that collects dirt and discharges the collected dirt along with the washing water when draining the washing water.
Specifically, the micro filter 130 may be formed in a cylindrical shape having a top and a bottom thereof open so as to be filter out small-sized dirt.
The course filter 110 may be installed through the open top of the micro filter 130 and configured to filter out dirt having particles of a predetermined size or larger before the dirt reaches the micro filter 130.
The fine filter 120 may have a filter hole that is larger than that of the micro filter 130 and smaller than that of the coarse filter 110 and cover the upper portion of the sump housing 150. The course filter 110 is formed in a lattice shape to filter out dirt of a certain size or more, and is detachably installed on the open top of the micro filter 130.
Referring to
In the above-described micro filter 130, the filter membrane 131 has a dense structure, such as a fiber to filter out fine dirt.
A detailed configuration of the sump assembly 100 will be described below.
The sump assembly 100 of the dishwasher according to the embodiment of the disclosure includes the sump housing 150 having the water storage chamber (151 in
Referring to
Referring to
As shown in
The upper sump housing 152 may be referred to as a first sump housing, the intermediate sump housing 153 may be referred to as a third sump housing, and the lower sump housing 154 may be referred to as a second sump housing.
Referring to
The intermediate sump housing 153 may be provided in the form of a cylinder having a top and a bottom thereof open. However, the shape of the intermediate sump housing 153 is not limited thereto, and the intermediate sump housing 153 may be provided in various shapes as long as it has a top and a bottom thereof open to connect the upper sump housing 152 and the lower sump housing 154 while forming the sidewall portion 153a.
The inclined portion 152b of the upper sump housing 152 for guiding the washing water into the water storage chamber 151 and the opening 152a of the upper sump housing 152 communicating with the inclined portion 152b may be provided in a shape corresponding to the shape of the top surface of the intermediate sump housing 153. The upper sump housing 152 may be provided at a bottom surface thereof with an upper groove 152d that is formed along the opening 152a and in which the upper end of the intermediate sump housing 153 is seated. The upper sump housing 152 may be provided with an upper sump housing sealing 152e formed at a lower end of an outermost rim area thereof. The upper sump housing sealing 152e may seal such that no gap is generated between the upper sump housing 152 and the bottom surface 13. The upper sump housing sealing 152e is configured to prevent washing water from leaking into the machine room L.
The open top surface of the lower sump housing 154 may be provided in a shape corresponding to the shape of the bottom surface of the intermediate sump housing 153. The lower sump housing 154 may be provided with a lower groove 154d which is formed along an upper rim thereof and in which a lower end of the intermediate sump housing 153 is seated.
As shown in
The sealing members 160a and 160b may include a rubber material having heat resistance. Alternatively, the sealing members 160a and 160b may include other material that has a heat resistance, and forms an airtight structure that does not leak water from the connection part when the intermediate sump housing 153 is connected to the upper sump housing 152 and the lower sump housing 154.
As shown in
Specifically, the lower end of the cylindrical frame 132 of the micro filter 130 may be fitted into the fitting groove 154e provided in the bottom portion 154a of the lower sump housing 154. The fitting groove 154e may be formed to have a width gradually decreasing as being directed downward. With such a configuration, the micro filter 130 may be easily inserted into the fitting groove 154e provided at the bottom portion of the lower sump housing 154.
Referring to
As shown in
As the micro filter 130 is fitted and coupled to the lower sump housing 154, sealing is ensured between the micro filter 130 and the sump housing 150, and dirt is prevented from passing through a coupling portion between the micro filter 130 and the lower sump housing 154. As the micro filter 130 comes into contact with the stepped flange 120b forming the opening 120a of the fine filter 120, a sealing between the micro filter 130 and the fine filter 120 is ensured and dirt is prevented from passing through the connecting portion between the micro filter 130 and the fine filter 120.
As shown in
The first coupling portion 152c and the second coupling portion 154c are coupled to each other through a coupling member 152f so that the upper sump housing 152, the intermediate sump housing 153, and the lower sump housing 154 are firmly fixed. When the first coupling portion 152c and the second coupling portion 154c are coupled through the coupling member 152f, the ring shaped sealing members 160 seated in the upper groove 152d of the upper sump housing 152 and the lower groove 154d of the lower sump housing 154 are further pressed, thereby improving airtightness.
In
As shown in
Hereinafter, the structure of the course filter 110 disposed in the drain chamber 151b as well as the drain chamber 151b will be described in detail with reference to
Since the course filter 110 is provided so that the lower portion thereof protrudes into the drain chamber 151b, the washing water passing through the course filter 110 and dirt contained in the washing water flow into the drain chamber 151b.
As shown in
Since the course filter fixing portion 110b and the above-described protrusion 154g are elastically coupled to each other, when a user applies an upward force to the course filter 110 for disassembling and cleaning, the lower end of the course filter 110 is elastically deformed, and the above described elastic coupling of the course filter fixing portion 110b and the protrusion 154g may be released. When the user continuously applies upward force to the course filter 110, the engaging flange 110a of the course filter 110 may be separated from the stepped fine filter flange 120b which the engaging flange 110a has been come in contact with and supported on.
As shown in
When the drain pump 40 is operated, the dirt collected in the drain chamber 151b may pass through a drain passage inlet 151bb together with the washing water, and then flow outside of the main body 10.
The micro filter 330 needs to come in close contact with the fitting groove 154e of the bottom portion 154a of the lower sump housing 154 to prevent the dirt in the drain chamber 151b from flowing into the circulation chamber 151a through a gap between the micro filter 130 and the lower sump housing 154. In order to prevent the dirt in the drain chamber 151b from flowing into the circulation chamber 151a through the gap between the micro filter 130 and the fine filter 120, the lower end of the stepped fine filter flange 120b needs to come in close contact with the upper end of the cylindrical frame 132 of the micro filter 130.
Hereinafter, a specific structure of the circulation chamber 151a will be described with respect to
The circulation chamber 151a may be formed by an outer circumferential surface of the micro filter 130, an inner circumferential surface of the intermediate sump housing 153, and a portion of the lower sump housing (154 in
Referring to
The washing water flowing into the circulation chamber 151a includes washing water that is filtered by the fine filter 120 and directly introduced into the inflow chamber 151c without flowing into the micro filter 130 and washing water that is introduced into the micro filter 130 and then is filtered by the micro filter 130 before flowing. The washing water introduced into the circulation chamber 151a passes through a circulation passage inlet 151aa provided in the lower sump housing 154 and the circulation pump 30, and then via a circulation passage (not shown), circulates through the spray units 41, 42, and 43.
As illustrated in
As shown in
When a flow area of the circulation chamber 151a adjacent to the circulation passage inlet 151aa is ensured wide, the flow rate of the washing water flowing through the circulation passage (not shown) in the dishwasher 1 may be increased. The ratio of the diameter of the micro filter 130 to the diameter of the intermediate sump housing 153 may be provided to have a value between 0.5 and 0.8. By having the diameter ratio in a range of 0.5 to 0.8, the flow area of the circulation chamber 151a adjacent to the circulation passage inlet 151aa may be provided in an appropriate range, and the flow rate of the washing water for sufficient heat exchange may be ensured.
Hereinafter, a heater formed in the intermediate sump housing 153 will be described in detail with reference to
The conventional dishwasher 1 has a heater 140 disposed as a separate component from the sump assembly 100. Alternatively, the heater 140 is coupled to the circulation pump 30 such that the washing water is pumped and heated at the same time before flowing out. Washing water is heated because the high-temperature washing water, when supplied to the sump assembly 100, may easily wash dishware through the spray nozzle. In addition, the heated washing water may decompose dirt present in the sump assembly 100 or the filter, or may sterilize microorganisms.
However, when the sump assembly 100 and the heater 140 are provided as separate components, heat loss may occur in the process of flowing the heated washing water into the sump assembly 100, and when the separate heater 140 is coupled to a pump, the pump may have a pressure loss or the energy efficiency of the pump may be lowered.
As shown in
The planar heating element 141 may be defined as a metal resistor having electrical resistance or a heating element having a planar shape that converts electrical energy into thermal energy through a heating portion of a ceramic resistor (a carbon layer).
The intermediate sump housing 153, that is, the sidewall portion 153a forming the water storage chamber 151 may be formed of the planar heating element 141, which is a heat generating element having a planar shape. Since the intermediate sump housing 153, that is, the sidewall portion 153a forming the water storage chamber 151, generates heat, the heat may directly heat up the washing water in the circulation chamber 151a and indirectly heat up the washing water in the micro filter 130.
The circulation chamber 151a may be formed such that the length of D1 is shorter than the length of D2. By ensuring a wider flow area of the circulation chamber 151a adjacent to the circulation passage inlet 151aa, the flow rate of the washing water flowing through the circulation passage (not shown) in the dishwasher 1 may be increased. When the flow rate in the circulation chamber 151a is increased, heat loss due to heat flowing out of the intermediate sump housing 153, that is, the side wall portion 53a forming the water storage chamber may be reduced compared to a case where the flow rate is slow.
Since the intermediate sump housing 153, that is, the side wall portion (153a in
Referring to
As is apparent from the above, since an intermediate sump housing is configured to include a heater (a planar heating element), a separate heater is not required, so that the dishwasher may be provided with a reduced overall volume.
The intermediate sump housing, that is, a sidewall portion of a water storage chamber is configured to include a heater (a planar heating element) such that the washing water in a circulation chamber is directly heated, thereby increasing the thermal efficiency of the dishwasher and reducing pressure loss of the pump.
Although few embodiments of the disclosure have been shown and described, the above embodiment is illustrative purpose only, and it would be appreciated by those skilled in the art that changes and modifications may be made in these embodiments without departing from the principles and scope of the disclosure, the scope of which is defined in the claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2019-0144171 | Nov 2019 | KR | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4279384 | Yamamoto | Jul 1981 | A |
| 5076456 | Geyer | Dec 1991 | A |
| 9833120 | Vallejo Noriega et al. | Dec 2017 | B2 |
| Number | Date | Country |
|---|---|---|
| 2810595 | Dec 2014 | EP |
| 2820997 | Jan 2015 | EP |
| 2384685 | Aug 2016 | EP |
| 10-1633933 | Jun 2016 | KR |
| 10-1642701 | Aug 2016 | KR |
| 10-2016-0149674 | Dec 2016 | KR |
| 10-1970517 | Apr 2019 | KR |
| Entry |
|---|
| International Search Report dated Feb. 26, 2021 from International Application No. PCT/KR2020/015753. |
| Number | Date | Country | |
|---|---|---|---|
| 20210137345 A1 | May 2021 | US |
