CN113302809B - Grounding module of air insulation distribution board - Google Patents
Grounding module of air insulation distribution board Download PDFInfo
- Publication number
- CN113302809B CN113302809B CN201980088974.0A CN201980088974A CN113302809B CN 113302809 B CN113302809 B CN 113302809B CN 201980088974 A CN201980088974 A CN 201980088974A CN 113302809 B CN113302809 B CN 113302809B
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- state
- opening
- grounding
- door
- closing
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/075—Earthing arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Patch Boards (AREA)
Abstract
The grounding module of the present invention may include a door, a first opening and closing unit, a lifting plate, a linkage plate, and a grounding unit. The first opening and closing unit is provided to the door. The first opening/closing means is switched to a first state or a second state by an external input. The lifting plate can move to a first position when the first opening and closing unit is in a first state, and is fixed at a second position when the first opening and closing unit is in a second state. The linkage plate moves in relation to the movement of the lifter plate. The grounding unit is in an inoperable state when the lifter plate is in the second position, and is converted into an operable state when the lifter plate is in the first position.
Description
Technical Field
The present invention relates to a grounding module of an air-insulated switchgear, and more particularly, to a grounding module of an air-insulated switchgear which is not grounded when a main circuit is in a live state and prevents a door from being opened in a non-grounded state.
Background
In general, the basic purpose of an air-insulated switchgear is to use air as a medium to open and close loads in power transmission and transformation equipment and the like. In addition, the air-insulated switchboard also plays a role in rapidly cutting off a circuit when power transmission and transformation equipment abnormally acts.
The air-insulated switchboard includes a load-on-off switch (Load Breaker Switch: LBS) and a Circuit Breaker (CB) for closing or opening the main circuit into or from a live state. In addition, the air-insulated switchgear further includes a ground Switch (Earth Switch: ES) for maintaining the potential of the air-insulated switchgear to zero by ground (Earth) in a state where the main circuit is in an open state.
The grounding switch is a device for ensuring the safety of an operator in a state where the main circuit is cut off by the load opening/closing switch and the circuit breaker, when the operator approaches the air-insulated switchboard for maintenance or repair, or the like.
However, if the main circuit is grounded in a charged state, a three-phase short circuit is formed and a three-phase short circuit current flows. This would cause a problem of hindering the normal operation of the air-insulated switchboard. In addition, an arc may be generated inside the air-insulated switchboard and thus should not be grounded in case the main circuit is in a charged state.
In the conventional air-insulated switchgear, the load opening/closing switch and the ground switch are operated independently of each other. Therefore, even when the load opening/closing switch is in a charged state, the operator can operate the grounding switch to achieve grounding.
In addition, there is a problem in that, in a state where the grounding switch is operated to achieve grounding, the main circuit which is short-circuited can be switched to a live state by the load switch, and thus if the operator does not pay particular attention, a serious safety accident may occur.
Therefore, a method for solving the following problems is required.
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a grounding module that prevents an operation of a grounding switch in a state where a main circuit is charged and that prevents an operation of a load opening/closing switch in a state where the main circuit is grounded.
The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art through the following description.
Means for solving the problems
The grounding module of the present invention for achieving the above object may include a door, a first opening and closing unit, a lifting plate, a linkage plate, and a grounding unit. The first opening and closing unit is provided to the door. And, it is converted into a first state or a second state by an external input. The lifting plate can move to a first position when the first opening and closing unit is in a first state, and is fixed at a second position when the first opening and closing unit is in a second state. The linkage plate moves along with the movement of the lifting plate. And, when the lifting plate is in the second position, the grounding unit is in a non-operable state, and when the lifting plate is in the first position, the grounding unit may be converted into an operable state.
In an embodiment of the present invention, the first opening and closing unit may include: a key operation section to which an input member is inserted, the first state or the second state being selected by an operation of the input member; a first rotation shaft that rotates with an operation of the input member; and a first blocking portion that rotates together with the first rotation shaft, and that contacts the linking plate to fix the linking plate when in the second state.
In an embodiment of the present invention, the input member may not be separated from the key operation part when in the first state.
In an embodiment of the present invention, the grounding unit may include a handle operation portion that is closed by the linkage plate when the lifting plate is in the second position, and that is removed and opened in an operable state when the lifting plate is in the first position, and the grounded state or the non-grounded state may be selected by operation of the handle operation portion.
In an embodiment of the present invention, the first opening and closing unit may be fixed in the first state while the handle operation portion is in the grounded state.
In an embodiment of the present invention, the door may not be opened while the handle operation portion is in the non-grounded state.
In an embodiment of the present invention, the grounding unit includes: a second rotation shaft that rotates at a preset angle and direction when the handle operation portion is shifted from the non-grounded state to the grounded state or from the grounded state to the non-grounded state; a driven link having one end coupled to the second rotation shaft through a cam member, performing a rotation motion along an outer circumference of the second rotation shaft, and the other end performing a linear reciprocation motion; and a driven lever formed at the other end of the driven link, and contacting the first rotation shaft to fix the first rotation shaft when the driven lever is in the grounded state.
In an embodiment of the present invention, the ground unit may include a door opening and closing lever coupled to the second rotation shaft to rotate together with rotation of the second rotation shaft, the door opening and closing lever being coupled such that the door cannot be opened when in the non-ground state and is separated from the door when in the ground state.
Effects of the invention
The grounding module of the present invention for solving the above-described problems can access the grounding unit only by operating the key operation portion with the input member in order to perform grounding, and can prevent a safety accident by opening no door in a state where grounding is not achieved.
In addition, the input member for operating the load opening and closing module cannot be drawn out in a state where grounding is performed, and thus the load opening and closing module cannot be operated in a state where the grounding switch is closed.
The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art through the description of the claims.
Drawings
Fig. 1 is a diagram showing a switchboard to which a grounding module according to an embodiment of the present invention is applied.
Fig. 2 and 3 are diagrams showing a combination relationship of the ground module according to an embodiment of the present invention.
Fig. 4 and 5 are diagrams showing an operation state of the first opening/closing unit in the ground module according to an embodiment of the present invention.
Fig. 6 and 7 are diagrams showing an operation state of a grounding unit in a grounding module according to an embodiment of the present invention.
Fig. 8 is a view showing a state of a driven lever that is lifted up and down with rotation of the second rotation shaft in the ground module according to an embodiment of the present invention.
Detailed Description
The foregoing objects, features, and advantages will be described in detail later with reference to the drawings, whereby those skilled in the art to which the present invention pertains can easily implement the technical ideas of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention unnecessarily confuses the gist of the present invention, the detailed description thereof will be omitted.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar constituent elements.
Next, a grounding module according to some embodiments of the present invention is described.
Fig. 1 is a diagram showing a switchboard to which a grounding module according to an embodiment of the present invention is applied.
As shown in fig. 1, the grounding module 100 of the present invention may be applied to an air-insulated switchboard 1. The switchboard 1 comprises a load opening and closing module 10, said load opening and closing module 10 adjusting the main circuit to a live state or an open state. The load switching module 10 can change the main circuit to a live state or an open state by an input member inserted into the load switching switch 12. The input member may be a key, but is not limited to a particular shape or manner. The load opening/closing module 10 may be charged or disconnected only when a predetermined input member is inserted into the load opening/closing switch 12. Further, in an embodiment of the present invention, the load opening/closing switch 12 and a key operation portion 112 of the first opening/closing unit 110 described later may be operated with one input member.
Furthermore, the switchboard of the present invention comprises a door 20 on the outside. The door 20 isolates the grounding module of the present invention from the outside. The door 20 may be opened in a preset motion or state, and in the state in which the door 20 is opened, the operation of the grounding module of the present invention may be implemented.
The door 20 includes a handle insertion hole 22 and a first guide opening 24. The handle insertion hole 22 is an opening opened or blocked by a later-described link plate 130. The first guide port 24 provides a path along which the second opening/closing switch 122, which will be described later, moves. Each of the handle insertion hole 22 and the first guide opening 24 is organically combined with the adjacent constitution. The handle insertion hole 22 and the first guide opening 24 will be described in more detail while explaining each of the relevant configurations.
Fig. 2 and 3 are diagrams showing a combination relationship of the ground module according to an embodiment of the present invention.
As shown in fig. 2 and 3, the grounding module 100 of the present invention includes a door 20 of the switchboard 1, a first opening and closing unit 110, a lifting plate 120, a linkage plate 130, and a grounding unit 140.
The door 20 is an opening/closing device capable of opening the inside of the cabinet body of the switchboard 1 by opening the cabinet body. The door 20 may be formed in at least a portion of a cabinet of the switchboard 1.
The first opening and closing unit 110 is provided at the door 20 and is converted into a first state or a second state by an external input.
The lifting plate 120 is movable to a first position when the first opening/closing unit 110 is in the first state, and is fixed to a second position when the first opening/closing unit 110 is in the second state.
The link plate 130 moves depending from the movement of the lifter plate 120.
The grounding unit 140 is in an inoperable state when the lifter plate 120 is in the second position, and is converted into an operable state when the lifter plate 120 is in the first position.
The respective configurations described above will be described in further detail below.
The first opening and closing unit 110 is provided to the door 20, and operates the opening and closing of the door 20. The first opening and closing unit 110 includes a key operation portion 112, and a portion of the key operation portion 112 is exposed to the outside of the door 20.
The aforementioned input member may be inserted into the key operation part 112, and in the case where a preset input member is inserted, the opening or closing may be selected by the rotation of the input member.
In an embodiment of the present invention, the external input for operating the first opening and closing unit 110 is an input member. The input member is rotated in a preset direction after being inserted into the key operation part 112, whereby the first opening and closing unit 110 can be set to the first state or the second state.
In one embodiment of the present invention, the first state is defined as an open state and the second state is defined as a closed state.
When the input member inserted into the key operation part 112 rotates, the first rotation shaft 114 rotates together with the input member in the inner space of the door 20. The first rotation shaft 114 includes a first blocking portion 116 and a second blocking portion 118, and the first blocking portion 116 and the second blocking portion 118 are bent or folded in a direction away from the central axis with reference to the central axis of rotation, or the thickness thereof is changed. The first blocking portion 116 and the second blocking portion 118 have an organic relationship with a link plate 130 and a follower link 152, which will be described later, and operate. The first blocking portion 116 and the second blocking portion 118 will be described again in detail together with the link plate 130 and the follower link 152.
The lifting plate 120 is disposed at an inner side of the door 20, and includes a second opening/closing switch 122 protruding to a front of the door 20. The door 20 is formed with a long hole-shaped first guide opening 24 that is opened long in the up-down direction, and the second open-close switch 122 protrudes to the front of the door 20 via the first guide opening 24.
The operator manually operates the second open/close switch 122 to move along the first guide opening 24. In detail, the first guide opening 24 is formed along the up-down direction of the door 20, and the second opening/closing switch 122 is located at the lowermost end of the first guide opening 24. When the operator moves the second open/close switch 122 upward, the lifter plate 120 coupled to the second open/close switch 122 rises in the inner space of the door 20. When the worker releases the second open/close switch 122, the lifter plate 120 is lowered by its own weight.
At this time, when the first opening and closing unit 110 is in the first state, the lifting plate 120 may be lifted to move to the first position. When the first opening/closing unit 110 is in the second state, the operator cannot pull up the second opening/closing switch 122, and the lifter plate 120 is fixed to the lower side.
Specifically, if the operator does not set the first opening/closing unit 110 to the first state, the lifting plate 120 cannot be lifted. The first opening and closing unit 110 may be set to the first state by rotating in a preset direction after the input member is inserted into the key operation part 112 of the first opening and closing unit 110.
The link plate 130 is disposed inside the door 20. The link plate 130 moves with the movement of the lifter plate 120. In detail, the elevation plate 120 includes a link member 124 extending toward the link plate 130, and the link member 124 passes through and is coupled with a link opening 132 formed in the link plate 130. Therefore, when the lifting plate 120 is lifted, the interlocking member 124 pushes and pulls the interlocking plate 130, and the interlocking plate 130 is lifted. In contrast, when the external force to pull up the lifter plate 120 is removed, the linkage plate 130 descends together with the lifter plate 120.
In an embodiment of the present invention, the locking portion 134 is formed at the upper end of the link plate 130. The locking portion 134 may be in contact with the first blocking portion 116 of the first opening/closing unit 110.
When the first opening/closing unit 110 is set to the first state, the first blocking portion 116 is disposed at a position apart from the space in which the locking portion 134 moves up and down with the rotation of the first rotation shaft 114.
When the first opening/closing unit 110 is set to the second state, the first blocking portion 116 contacts the upper end of the locking portion 134 in response to the rotation of the first rotation shaft 114, so that the locking portion 134 cannot move upward.
If the locking portion 134 is caught by the first blocking portion 116 and cannot move upward, the link plate 130 integrally formed with the locking portion cannot move upward, and the lifter plate 120 connected by the link plate 130 and the link member 124 cannot move upward.
Fig. 4 and 5 are diagrams showing an operation state of the first opening/closing unit in the ground module according to an embodiment of the present invention, fig. 4 shows a second state, and fig. 5 shows a first state.
As shown in fig. 4 and 5, when the operator rotates the key operation part 112 of the first opening and closing unit 110 through the input member, the first rotation shaft 114 rotates together. The first blocking portion 116 rotates together with the rotation of the first rotation shaft 114, and the first blocking portion 116 contacts the upper end of the locking portion 134 of the link plate 130 in the second state, so that the link plate 130 cannot move upward.
In the second state, the lifter plate 120 is in the second position. With the lifter plate 120 in the second position, the handle insertion hole 22 is blocked. Therefore, in the second state, the handle operation portion 142 is not exposed to the outside, and thus the operation of the handle operation portion 142 cannot be achieved.
In the first state, the first blocking portion 116 is removed from the upper portion of the locking portion 134, so that the link plate 130 and the elevation plate 120 can be raised.
When the operator pulls up the second open/close switch 122 in the first state, the lifter plate 120 is lifted up and moved to the first position. When the lifting plate 120 is lifted to the first position, the interlocking plate 130 is also lifted together. As the link plate 130 is lifted, the handle insertion hole 22 blocked by the link plate 130 is opened. The handle insertion hole 22 is provided in the door 20, and a handle operation portion 142 capable of operating the grounding unit 140 is disposed therein.
Therefore, in the first state, the interlock plate 130 is raised by the operation of the operator, and the handle insertion hole 22 closed by the interlock plate 130 is opened. The handle operation portion 142 inside the handle insertion hole 22 is exposed.
A tool may be inserted into the handle operation part 142 to operate the ground unit 140. If the handle operation part 142 rotates at a preset angle, the grounding unit 140 performs grounding.
Fig. 6 and 7 are diagrams showing an operation state of a grounding unit in a grounding module according to an embodiment of the present invention.
As shown in fig. 6 and 7, the grounding unit 140 includes a handle operation portion 142, and further includes a second rotation shaft 144 that rotates together with the rotation of the handle operation portion 142.
The second rotation shaft 144 is coupled with the cam member 150 and the door opening and closing lever 146.
First, the door opening/closing lever 146 is provided to interfere with the door 20 to prevent the door 20 from being opened in a state where grounding is not performed by the handle operation portion 142.
Therefore, in a state where the door 20 is closed, the door can be opened only by opening the handle operation portion 142 first and then operating the handle operation portion 142 to achieve grounding through the above-described process.
Fig. 8 is a view showing a state of a driven lever that is lifted up and down with rotation of the second rotation shaft in the ground module according to an embodiment of the present invention.
As shown in fig. 8, one end of the cam member 150 is fixed to the second rotation shaft 144, and the other end is located at a position spaced apart from a central shaft of rotation of the second rotation shaft 144 by a preset interval. Therefore, the other end of the cam member 150 rotates with a large radius of rotation. The follower link 152 is rotatably coupled to the other end of the cam member 150. The follower link 152 has a predetermined length, and a lower end thereof is coupled with the cam member 150 to rotate together with the cam member 150. The follower lever 154 is formed at an upper end of the follower link 152, and the follower lever 154 reciprocates in the up-down linear direction when the cam member 150 rotates. Specifically, when the second rotation shaft 144 is in the ground state by the operation rotation of the handle operation portion 142, the driven lever 154 is positioned at the bottom dead center (bottom dead center), and when the ground engaging unit 140 is in the ground releasing state, the driven lever 154 is positioned at the top dead center (top dead point).
When the driven lever 154 is positioned at the bottom dead center, it contacts the second blocking portion 118 of the first rotary shaft 114. The first rotation shaft 114 cannot be rotated in a state where the second blocking portion 118 is in contact with the driven lever 154, which results in that the operator cannot rotate the input member inserted into the key operation portion 112 in the grounded state. Therefore, when the grounding unit 140 is in the grounding state, the operator cannot operate not only the input member inserted into the key operation portion 112 but also the input member cannot be drawn out from the key operation portion 112.
This is to prevent the load opening and closing module 10 using the same input member as the first opening and closing unit 110 from being operated in a charged state while maintaining the ground.
The aforementioned lifter plate 120 may include a second guide opening 126, and the second guide opening 126 may be a long hole formed in the up-down direction. The fixed protrusion may be inserted into the door 20 or the cabinet of the second guide opening 126, which enables the elevation plate 120 to be vertically elevated straight.
In addition, the link plate 130 may include a third guide opening 136, and the third guide opening 136 may be a long hole formed in the up-down direction. The third guide port 136 enables the linkage plate 130 are vertically lifted and lowered straight.
The second guide port 126 and the third guide port 136 may be formed in at least one or in plural.
The grounding module 100 of the present invention having the above-described configuration operates the load opening and closing module 10 and the first opening and closing unit 110 using the same input member. When the load opening/closing module 10 is in the charged state, the operator cannot operate the first opening/closing unit 110, and thus cannot open the door 20.
If the door 20 is not grounded, the door opening/closing lever 146 of the grounding unit 140 cannot be opened. In the grounded state, the input member inserted into the key operation unit 112 cannot be pulled out.
Therefore, since the ground cannot be realized while the air-insulated switchgear 1 is in the charged state, the possibility of abnormal operation can be reduced. Further, since the door 20 cannot be opened without grounding, an accident of the operator can be prevented.
Further, since the input member cannot be pulled out in the grounded state, the operator can intuitively recognize the grounded state, and thus, the operator's error can be reduced.
As described above, the preferred embodiments of the present invention have been described, and it is apparent to those skilled in the art that the fact that other specific forms may be embodied in other than the foregoing embodiments may be made without departing from the spirit or scope of the present invention. The embodiments described above are therefore to be understood as illustrative and not restrictive, and the invention is thus not to be limited to the details given above, but may be modified within the scope and equivalents of the appended claims.
Claims (6)
1. A grounding module adapted for use with an air insulated switchgear panel including a load opening and closing module, wherein the grounding module comprises:
a door;
a first opening/closing unit provided to the door and configured to be converted into a first state or a second state by an external input;
a lifting plate movable to a first position when the first opening/closing unit is in the first state, and fixed to a second position when the first opening/closing unit is in the second state;
a linkage plate that moves in relation to the movement of the lifting plate; and
a grounding unit which is in an inoperable state when the lifting plate is in the second position and is converted into an operable state when the lifting plate is in the first position,
the first opening/closing unit includes:
a key operation section to which an input member is inserted, the first state or the second state being selected by an operation of the input member;
a first rotation shaft that rotates with an operation of the input member; and
a first blocking part rotating together with the first rotating shaft, contacting with the linkage plate to fix the linkage plate when in the second state,
the input member is not separated from the key operation part when the first opening and closing unit is in the first state and the grounding unit is in the grounding state,
when the input member is inserted into the load opening/closing module, the main circuit of the air-insulated switchgear is adjusted to a live state or an open state.
2. The grounding module of claim 1, wherein,
the grounding unit includes a handle operation portion that is closed by the linkage plate when the lifting plate is in the second position, and that is removed and opened in an operable state when the lifting plate is in the first position,
the grounded state or the ungrounded state is selected by an operation of the handle operation section.
3. The grounding module of claim 2, wherein,
the first opening/closing unit is fixed in the first state when the handle operation portion is in the grounded state.
4. The grounding module of claim 2, wherein,
the door cannot be opened while the handle operation portion is in the non-grounded state.
5. The grounding module of claim 2, wherein,
the grounding unit includes:
a second rotation shaft that rotates at a preset angle and direction when the handle operation portion is shifted from the non-grounded state to the grounded state or from the grounded state to the non-grounded state;
a driven link having one end coupled to the second rotation shaft by a cam member, performing a rotation motion along an outer circumference of the second rotation shaft, and the other end performing a linear reciprocation motion; and
and a driven lever formed at the other end of the driven link, and contacting the first rotation shaft to fix the first rotation shaft when the driven lever is in the grounded state.
6. The grounding module of claim 5, wherein,
the grounding unit includes a door opening/closing lever coupled to the second rotation shaft to rotate together with rotation of the second rotation shaft, the door opening/closing lever being coupled such that the door cannot be opened when in the non-grounding state and is separated from the door when in the grounding state.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2019-0006157 | 2019-01-17 | ||
| KR1020190006157A KR102137770B1 (en) | 2019-01-17 | 2019-01-17 | Grounding module for switchboard |
| PCT/KR2019/011697 WO2020149488A1 (en) | 2019-01-17 | 2019-09-10 | Grounding module of air-insulated switchboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113302809A CN113302809A (en) | 2021-08-24 |
| CN113302809B true CN113302809B (en) | 2023-09-19 |
Family
ID=71613675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980088974.0A Active CN113302809B (en) | 2019-01-17 | 2019-09-10 | Grounding module of air insulation distribution board |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR102137770B1 (en) |
| CN (1) | CN113302809B (en) |
| WO (1) | WO2020149488A1 (en) |
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| JP4320981B2 (en) * | 2001-07-02 | 2009-08-26 | 富士電機システムズ株式会社 | Door handle device for electrical equipment panel |
| JP4436067B2 (en) * | 2003-04-25 | 2010-03-24 | スガツネ工業株式会社 | Flat handle device |
| KR100913217B1 (en) * | 2009-04-20 | 2009-08-24 | 문운하 | Opening and closing device for distributing board |
| KR101134933B1 (en) * | 2011-02-25 | 2012-04-17 | 엘에스산전 주식회사 | Door locking device for switch board |
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2019
- 2019-01-17 KR KR1020190006157A patent/KR102137770B1/en active IP Right Grant
- 2019-09-10 CN CN201980088974.0A patent/CN113302809B/en active Active
- 2019-09-10 WO PCT/KR2019/011697 patent/WO2020149488A1/en active Application Filing
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|---|---|---|---|---|
| JPH1169517A (en) * | 1997-08-07 | 1999-03-09 | Fuji Electric Co Ltd | Enclosed power switchboard |
| CN201608459U (en) * | 2009-11-03 | 2010-10-13 | Abb技术有限公司 | Interlocking device of air insulating switchgear cabinet door |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020149488A1 (en) | 2020-07-23 |
| CN113302809A (en) | 2021-08-24 |
| KR102137770B1 (en) | 2020-07-24 |
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