CN115243992A - Oil recovery device for elevator - Google Patents
Oil recovery device for elevator Download PDFInfo
- Publication number
- CN115243992A CN115243992A CN202080091157.3A CN202080091157A CN115243992A CN 115243992 A CN115243992 A CN 115243992A CN 202080091157 A CN202080091157 A CN 202080091157A CN 115243992 A CN115243992 A CN 115243992A
- Authority
- CN
- China
- Prior art keywords
- oil
- region
- oleophilic
- repellent
- guide rail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 45
- 239000005871 repellent Substances 0.000 claims abstract description 61
- 239000007853 buffer solution Substances 0.000 claims abstract description 16
- 230000002940 repellent Effects 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 230000035939 shock Effects 0.000 description 16
- 239000006096 absorbing agent Substances 0.000 description 15
- 239000000872 buffer Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
Landscapes
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
An oil recovery device for an elevator according to the present invention is provided on an upper surface of a buffer base that supports bottom portions of a pair of guide rails of the elevator, and is characterized by comprising: an oleophilic region which is disposed on the upper surface of the buffer base, is in contact with the lower end surface of the guide rail, and is formed so as to surround the guide rail with an oleophilic surface when viewed in the vertical direction; and an oil-repellent region that is disposed on the upper surface of the buffer base and is formed so as to surround the oleophilic region with an oil-repellent surface having oil repellency.
Description
Technical Field
The present invention relates to an oil recovery device for an elevator, which recovers oil supplied to a guide rail.
Background
Conventionally, in order to recover oil supplied to a guide rail, an oil receiver for a guide rail of an elevator in which an oil receiver is disposed inside a lower side of a buffer base of the guide rail has been proposed (for example, see patent document 1).
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open publication No. 2017-197301
Disclosure of Invention
Problems to be solved by the invention
The container for storing the oil falling from the guide rail onto the guide rail buffer base is generally box-shaped, but the oil stored in the container needs to be collected. Here, in the device of patent document 1, in addition to the container, a device serving as a path for guiding oil to the container and a door for taking out the container need to be provided in the rail damper base, which raises a problem of an increase in equipment cost. Further, since the container is disposed inside the lower side of the shock absorber seat of the guide rail, it is necessary to open the door on the upper surface side first, take out the container, recover the oil, return the container to the original position, and close the door. However, there is a problem that the procedure for performing the series of operations is complicated. Further, when cleaning the oil accumulated in the tank, the tank is box-shaped, and therefore, there is a problem that the wiping operation takes time.
The present invention has been made to solve the above-described problems, and an object thereof is to provide an oil recovery apparatus capable of easily performing an oil recovery operation and cleaning without providing a container or the like for storing oil.
Means for solving the problems
An oil recovery device for an elevator according to the present invention is provided on an upper surface of a buffer base that supports bottoms of a pair of guide rails of the elevator, and is characterized by comprising: an oleophilic region which is disposed on the upper surface of the buffer base and is in contact with the lower end surface of the guide rail, and which is formed so as to surround the guide rail with an oleophilic surface when viewed in the vertical direction; and an oil-repellent region that is disposed on the upper surface of the buffer base and is formed so as to surround the oleophilic region with an oil-repellent surface having oil repellency.
Effects of the invention
The invention can realize an oil recovery device which can easily perform oil recovery operation and cleaning without arranging a container for storing oil and the like.
Drawings
Fig. 1 is a perspective view showing an elevator oil recovery apparatus (as a whole) according to embodiment 1 of the present invention.
Fig. 2 is a plan view showing a key part of the oil recovery apparatus of the elevator of fig. 1 according to embodiment 1 of the present invention.
Fig. 3 is a schematic diagram (cross-sectional view) showing a key part of an oil-repellent region of the elevator oil recovery apparatus of fig. 2 according to embodiment 1 of the present invention.
Fig. 4 is a schematic view (sectional view) showing a key part of an oleophilic region of the oil recovery apparatus of the elevator of fig. 2 of embodiment 1 of the present invention.
Fig. 5 is a schematic diagram (cross-sectional view) showing a key part of the boundary between the oleophilic area and the oleophobic area of the oil recovery device of the elevator in fig. 2 according to embodiment 1 of the present invention.
Fig. 6 is a perspective view showing an oil recovery apparatus (overall) for an elevator according to embodiment 2 of the present invention.
Fig. 7 is a plan view showing key parts of an elevator oil recovery apparatus according to embodiment 3 of the present invention.
Fig. 8 is an enlarged view (plan view) of a key part of the oil recovery apparatus for an elevator of fig. 7 showing embodiment 3 of the present invention.
Detailed Description
Fig. 1 is a perspective view showing an oil recovery device for an elevator according to embodiment 1 of the present invention. In the figure, a pair of guide rails 1 are disposed in a hoistway. Each guide rail 1 is supported by a plurality of guide rail brackets, not shown, fixed in the hoistway. Further, each guide rail 1 includes: a back plate section 2 disposed along the vertical direction; and a guide portion 3 that protrudes horizontally from a widthwise intermediate portion of the back plate portion 2 and is disposed along the longitudinal direction of the back plate portion 2. Therefore, each guide rail 1 is formed in a T-shape in a horizontal cross section by the back plate 2 and the guide 3. The pair of guide rails 1 are disposed in a state where the guide portions 3 are opposed to each other in the horizontal direction.
A car (not shown) or a counterweight (not shown) is disposed as a lifting body between the pair of guide rails 1. The vertically movable body moves in the vertical direction while being guided by the guide portions 3. The elevating body is provided with an oil supply device (not shown) for supplying oil for lubrication to each guide rail 1.
A buffer (not shown) and a buffer seat 4 for supporting the buffer are provided at a pit portion of the hoistway, that is, a bottom portion of the hoistway. The damper seat 4 is disposed horizontally along a direction in which the guide portions 3 of the pair of guide rails 1 face each other. The damper is provided at the longitudinal center of the damper seat 4. Further, the shock absorber absorbs a collision force received from the vertically movable body when the vertically movable body collides with the shock absorber, thereby reducing a shock to the vertically movable body.
Guide rail support plates 5 for supporting the lower end portions of the guide rails 1 are fixed to both longitudinal end portions of the damper base 4. Each rail support plate 5 is vertically disposed. The lower end of each guide rail 1 is fixed to each guide rail support plate 5 by a pair of clamps (not shown) in a state where the back surface of the back plate section 2 is in contact with the guide rail support plate 5. Each guide rail 1 is supported by a plurality of rail brackets and rail support plates 5 in a state where a space is formed below the guide rail 1. In this example, the lower end surface of each guide rail 1 contacts the upper surface of the damper seat 4.
In fig. 2, the oil recovery device 6 is provided on the upper surface of the shock absorber seat 4 and is disposed in contact with the lower end surface of each guide rail 1. In the oil recovery device 6, an oleophilic region 7 having an oleophilic surface is formed so as to surround the back plate portion 2 and the guide portion 3 of each guide rail 1 from three directions when viewed from the vertical direction. The lower end surface of guide rail 1 abuts on oleophilic region 7 from the upper surface side.
An oil repellent region 8 is disposed on the upper surface of the shock absorber seat 4 so as to surround the oil repellent region 7 when viewed in the vertical direction. The oil-repellent region 8 has a width of about 2 to 3cm in the longitudinal direction and is formed of an oil-repellent paint. For the oil-repellent coating material, a fluorine-based coating agent is used. Here, oil-repellent region 8 has relatively higher oil-repellency than at least oil-repellent region 7. Therefore, in the oil-repellent region 8, the oil 9 is repelled by the oil-repellent surface, and therefore the cross-sectional shape rises upward from the oil-repellent surface of the oil-repellent region 8, and becomes a substantially spherical shape as shown in fig. 3.
Next, the operation of embodiment 1 configured as described above will be described. First, oil 9 falling from guide rail 1 is caught by oleophilic region 7. Oil 9 that falls on oleophilic areas 7 spreads out planarly and gradually accumulates in oleophilic areas 7.
The cross-sectional shape of oil 9 that has fallen on oleophilic region 7 rises from the oleophilic surface of oleophilic region 7 to a level lower than that of oleophilic region 8, and is in the state shown in fig. 4. When oil 9 reaches the boundary with oil-repellent region 8 while accumulating in oil-repellent region 7 in its entirety, oil 9 has a cross-sectional shape as shown in fig. 5.
At the boundary between oil repellent region 8 and oil repellent region 7, oil 9 gradually increases in height from oil repellent region 7 side toward oil repellent region 8 side. This is a phenomenon in which oil 9 on the oleophilic region 7 side is repelled by the oil-repellent region 8 side. As described above, by maintaining the cross-sectional shape at the boundary between oleophilic region 7 and oil-repellent region 8 as shown in fig. 5, oil 9 is less likely to enter from the side of oleophilic region 7 toward the side of oil-repellent region 8. Therefore, oil 9 accumulated in lipophilic region 7 does not leak to the outside, but accumulates a certain amount in lipophilic region 7.
Here, if oil 9 is left standing for a long time in a state of being accumulated in lipophilic region 7, it may leak outside beyond the capacity limit of lipophilic region 7. Therefore, the maintenance worker regularly enters the pit surface in the hoistway to perform maintenance of the oil recovery device 6. As a matter of maintenance of oil recovery device 6, before oil 9 accumulated in oil-repellent region 7 leaks to the outside, maintenance work can be completed only by wiping oil 9 with rag or the like from the upper surface side of oil-repellent region 7.
As described above, according to embodiment 1, the oil recovery device 6 for an elevator, which is provided on the upper surface of the buffer base 4 that supports the bottom portions of the pair of guide rails 1 of the elevator, includes: an oleophilic region 7 which is disposed on the upper surface of the shock absorber seat 4 and is in contact with the lower end surface of the guide rail 1, the oleophilic region 7 being formed so as to surround the guide rail 1 with an oleophilic surface when viewed in the vertical direction; and an oil-repellent region 8 that is disposed on the upper surface of the shock absorber seat 4 and is formed so as to surround the oleophilic region 7 with an oil-repellent surface, whereby the oil recovery apparatus 6 can be realized in which the recovery operation and cleaning of the oil 9 can be easily performed without providing a container or the like that stores the oil 9.
Further, since the oil-repellent region 7 is formed so as to surround the front surface of the guide rail 1 from three directions when viewed in the vertical direction, the oil 9 can be efficiently stored while covering a minimum necessary range without enlarging the upper surface of the shock absorber seat 4.
Further, since the oil-repellent surface of the oil-repellent region 8 has relatively higher oil-repellent properties than the oil-repellent surface of the oil-repellent region 7, the oil recovery device 6 for an elevator can be disposed on the upper surface of the buffer base 4 without being affected by the oil-repellency and the surface treatment of the upper surface of the buffer base 4. Thus, the upper surfaces of the various buffer bases 4 can be used as the oil recovery device 6 of the elevator, and therefore, an increase in the cost of the oil recovery device 6 of the elevator can be suppressed.
Fig. 6 is a diagram illustrating an oil recovery device 10 according to embodiment 2 of the present invention, and fig. 6 is a perspective view showing key parts of the oil recovery device 10. The oil recovery device 10 according to embodiment 2 of the present invention is different in that a recess 12 is provided in the lipophilic region 11, and the same parts as those other than the recess are denoted by the same reference numerals and the description thereof is omitted.
A recess 12 is provided in the oil-repellent region 11 in the vicinity of the guide portion 3 of the guide rail 1 when viewed from the vertical direction. The recess 12 is formed in a hemispherical shape having a diameter of about 3 to 5cm and a depth of 1 to 2mm on the upper surface of the shock absorber seat 4 by press working.
Next, the operation of embodiment 2 configured as described above will be described with reference to fig. 6. First, oil 9 falling from guide rail 1 is accumulated in oleophilic region 11. The oil 9 that falls on the oleophilic areas 11 gradually spreads out and accumulates flatly.
When oil 9 in oleophilic region 11 reaches recess 12, it begins to accumulate in recess 12. That is, the capacity of oil-repellent region 11 is enlarged by the capacity of recess 12 with respect to oil-repellent region 7 of embodiment 1.
As described above, according to embodiment 2, since recess 12 having a depth in the vertical direction is formed in oil-repellent region 11, more oil 9 can be stored than in oil-repellent region 7 of embodiment 1. Thus, the oil recovery device 10 can reduce the maintenance time compared to embodiment 1.
Fig. 7 to 8 are views for explaining the oil recovery device 13 according to embodiment 3 of the present invention, fig. 7 is a plan view showing key parts of the oil recovery device 13, and fig. 8 is a plan view showing key parts of the oil recovery device 13. The oil recovery apparatus 13 according to embodiment 3 of the present invention is different in that a flow path 15 is provided in the lipophilic region 14, and the same parts as those other than these are denoted by the same reference numerals and the description thereof is omitted.
A flow path 15 is provided in the lipophilic region 14 on the guide portion 3 side of the guide rail 1 when viewed from the vertical direction. The flow passages 15 are formed in plural along the longitudinal direction of the shock absorber seat 4 from the vicinity of the guide portion 3 toward the depression 12, and are alternately formed with oleophilic areas 16 that guide the oil 9 from the guide portion 3 side toward the depression 12, and oil repellent surfaces 17 that are arranged so as to sandwich the oleophilic areas 16 from both sides. The oil-repellent surface 17 is formed of the same paint as the oil-repellent surface of the oil-repellent region 8.
In flow channel 15, the width of oleophilic region 16 is formed to gradually increase from the vicinity of guide portion 3 toward recess 12. Further, the width of the oil-repellent surface 17 is formed to gradually narrow from the vicinity of the guide portion 3 toward the recess 12.
Next, the operation of embodiment 3 configured as described above will be described with reference to fig. 7 to 8. First, oil 9 falling from guide rail 1 is accumulated in oleophilic region 11. Oil 9 that falls on oleophilic area 14 flows in flow path 15 from the vicinity (upstream) of guide 3 toward recess 12 (downstream) in oleophilic area 16.
Here, as shown in fig. 8, since the width of the oleophilic region 16 gradually increases from the vicinity of the guide portion 3 toward the recess 12, a force that pushes out the oil 9 from the guide portion 3 side toward the recess 12 side acts. That is, the oil 9 is pushed from the guide portion 3 side toward the recess 12, guided by the flow path 15, and accumulated in the recess 12. When the recess 12 is filled with the oil 9, the oil 9 overflowing from the recess 12 is stored while spreading flatly in the lipophilic region 14.
As described above, according to embodiment 3, since the oil-repellent region 14 includes the flow path 15, and the flow path 15 is disposed between the vicinity of the guide rail 1 and the recess 12, and guides the oil 9 falling from the guide rail 1 to the recess 12, the oil 9 is easily guided from the guide portion 3 side toward the recess 12, and the oil 9 is easily accumulated in the recess 12 in the oil-repellent region 14.
Further, since the width of the lipophilic region 16 formed in the flow path 15 is formed so as to gradually increase from the upstream toward the downstream, a force that pushes out the oil 9 from the guide portion 3 side toward the recess 12 side acts. This allows the oil 9 to be efficiently guided from the guide portion 3 side toward the recess 12 in the flow path 15.
The flow path 15 further includes: a plurality of oil repellent surfaces 17 formed to extend in the longitudinal direction of the shock absorber seat 4 in the oil-repellent region 14 and arranged to be separated from each other; and an oleophilic region 16 disposed so as to be sandwiched by a plurality of oil repellent surfaces 17. This makes it possible to form the flow channel 15 with the same oil-repellent surface as the oil-repellent region 8, and therefore, an increase in cost can be suppressed.
Further, oil- repellent regions 7, 11, and 14 surround the front surface of guide rail 1 from three directions when viewed from the vertical direction, but may not necessarily be three directions. For example, oleophilic areas 7, 11, 14 may be formed as an all-around enclosure that includes not only the front surface of rail 1 but also the rear surface.
In addition, when the oil 9 on the surface of the buffer holder 4 has low lipophilicity such as being repelled, the lipophilic regions 7, 11, 14, and 16 may be coated with a coating material having lipophilicity.
The recess 12 is formed in the upper surface of the shock absorber seat 4 by press working, but may be formed in a different shape by machining such as cutting. For example, even if the recess 12 is formed in a square shape having a depth, the same operation and effect can be obtained.
Further, the flow channel 15 is formed by a combination of the oleophilic region 16 and the oil-repellent surface 17, but may not necessarily be formed by such a combination. For example, even if the upper surface of the shock absorber seat 4 is formed into the same shape as the flow passage 15 by press working, the same operation and effect can be obtained.
The width of the lipophilic region 16 formed in the flow path 15 is formed so as to gradually increase from the upstream to the downstream. For example, the width of oleophilic area 16 may also be formed with the same width from upstream toward downstream. When the oil-repellent regions 16 are formed to have the same width, the force of pushing the oil 9 from the guide portion 3 side to the recess 12 side becomes weak, but it is needless to say that at least the effect of guiding the oil 9 can be obtained.
Description of the reference symbols
1: a guide rail; 2: a back plate part; 3: a guide section; 4: a buffer seat; 5: a guide rail support plate; 6. 10, 13: an oil recovery unit; 7. 11, 14, 16: an oleophilic area; 8: an oleophobic area; 9: an oil; 12: recessing; 15: a flow path; 17: and (4) oil-repellent surface.
Industrial applicability
The present invention relates to an oil recovery device for an elevator, which recovers oil supplied to a guide rail.
Claims (7)
1. An oil recovery device for an elevator, which is provided on an upper surface of a buffer base supporting bottom portions of a pair of guide rails of the elevator,
the oil recovery device for an elevator is provided with: an oleophilic region which is disposed on an upper surface of the buffer base, abuts against a lower end surface of the guide rail, and is formed so as to surround the guide rail with an oleophilic surface having oleophilicity when viewed in a vertical direction; and an oil-repellent region that is disposed on an upper surface of the buffer base and is formed so as to surround the oleophilic region with an oil-repellent surface having oil repellency.
2. The oil recovery device for an elevator according to claim 1, wherein the oleophilic region is formed to surround the front surface of the guide rail from three directions when viewed from a vertical direction.
3. The oil recovery apparatus for an elevator according to claim 1 or 2, wherein an oil repellent surface of the oil repellent region has a relatively higher oil repellency than an oleophilic surface of the oleophilic region.
4. The oil recovery device of an elevator according to any one of claims 1 to 3, wherein a recess having a depth in a vertical direction is formed in the oleophilic region.
5. The oil recovery device for an elevator according to claim 4, wherein the oleophilic region includes a flow path that is disposed between a vicinity of the guide rail and the recess and guides oil falling from the guide rail to the recess.
6. The oil recollecting apparatus of an elevator according to claim 5, wherein a width of the flow path is formed to be gradually widened from an upstream toward a downstream.
7. The oil recovery device for an elevator according to claim 5 or 6, wherein the flow path includes: a plurality of the oil-repelling surfaces that are formed to extend in the longitudinal direction of the buffer base in the oleophilic region and are arranged separately from each other; and the oleophilic region is disposed so as to be sandwiched by the plurality of oil repellent surfaces.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2020/012667 WO2021191958A1 (en) | 2020-03-23 | 2020-03-23 | Oil recovery device for elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115243992A true CN115243992A (en) | 2022-10-25 |
| CN115243992B CN115243992B (en) | 2024-03-08 |
Family
ID=77891134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080091157.3A Active CN115243992B (en) | 2020-03-23 | 2020-03-23 | Elevator oil recovery device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7204993B2 (en) |
| CN (1) | CN115243992B (en) |
| WO (1) | WO2021191958A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11139720A (en) * | 1997-11-10 | 1999-05-25 | Hitachi Building Systems Co Ltd | Lubricating oil recovering method for guide rail |
| JP2000247561A (en) * | 1999-02-26 | 2000-09-12 | Hitachi Building Systems Co Ltd | Elevator guide rail lubricating device, and accommodating case and oil preserving member for lubricating device |
| JP2001171944A (en) * | 1999-12-21 | 2001-06-26 | Hitachi Building Systems Co Ltd | Lubricating means of guide rail of elevator |
| JP2011219179A (en) * | 2010-04-02 | 2011-11-04 | Mitsubishi Electric Corp | Rail fixing device of elevator |
| JP2012224457A (en) * | 2011-04-21 | 2012-11-15 | Hitachi Building Systems Co Ltd | Oil absorbing body |
| CN104728893A (en) * | 2015-03-30 | 2015-06-24 | 宁波博业环保科技有限公司 | Oil fume treating system for kitchen |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007315424A (en) * | 2006-05-23 | 2007-12-06 | Toyota Motor Corp | Oil pan structure |
| JP2017197301A (en) * | 2016-04-25 | 2017-11-02 | 三菱電機ビルテクノサービス株式会社 | Oil recovery device for elevator |
-
2020
- 2020-03-23 CN CN202080091157.3A patent/CN115243992B/en active Active
- 2020-03-23 WO PCT/JP2020/012667 patent/WO2021191958A1/en active Application Filing
- 2020-03-23 JP JP2022509772A patent/JP7204993B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11139720A (en) * | 1997-11-10 | 1999-05-25 | Hitachi Building Systems Co Ltd | Lubricating oil recovering method for guide rail |
| JP2000247561A (en) * | 1999-02-26 | 2000-09-12 | Hitachi Building Systems Co Ltd | Elevator guide rail lubricating device, and accommodating case and oil preserving member for lubricating device |
| JP2001171944A (en) * | 1999-12-21 | 2001-06-26 | Hitachi Building Systems Co Ltd | Lubricating means of guide rail of elevator |
| JP2011219179A (en) * | 2010-04-02 | 2011-11-04 | Mitsubishi Electric Corp | Rail fixing device of elevator |
| JP2012224457A (en) * | 2011-04-21 | 2012-11-15 | Hitachi Building Systems Co Ltd | Oil absorbing body |
| CN104728893A (en) * | 2015-03-30 | 2015-06-24 | 宁波博业环保科技有限公司 | Oil fume treating system for kitchen |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7204993B2 (en) | 2023-01-16 |
| WO2021191958A1 (en) | 2021-09-30 |
| JPWO2021191958A1 (en) | 2021-09-30 |
| CN115243992B (en) | 2024-03-08 |
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