CN113744962A - Three-port power electronic transformer - Google Patents
Three-port power electronic transformer Download PDFInfo
- Publication number
- CN113744962A CN113744962A CN202110973758.3A CN202110973758A CN113744962A CN 113744962 A CN113744962 A CN 113744962A CN 202110973758 A CN202110973758 A CN 202110973758A CN 113744962 A CN113744962 A CN 113744962A
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- Prior art keywords
- mounting
- power electronic
- mounting frame
- port power
- electronic transformer
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- 238000009434 installation Methods 0.000 claims abstract description 22
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims description 7
- 241000883990 Flabellum Species 0.000 claims description 4
- 238000010408 sweeping Methods 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cleaning In General (AREA)
Abstract
The invention belongs to the technical field of transformers, and particularly relates to a three-port power electronic transformer which comprises a transformer body, wherein a plurality of wiring ports are fixedly arranged on the transformer body, the bottom of the transformer body is fixedly provided with a mounting frame, two mounting plates are symmetrically and slidably arranged on the mounting frame, a protective device is slidably arranged on each of the two mounting plates, a screw rod is rotatably arranged on each mounting frame, the two mounting plates are in threaded connection with the screw rod, a plurality of clamping grooves are formed in the mounting frame, and a circular plate is fixedly arranged at one end of the screw rod. The transformer heat dissipation device is convenient to use, time-saving and labor-saving in installation and disassembly, and can dissipate heat of the transformer when in use, so that the service life of the device is effectively prolonged.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a three-port power electronic transformer.
Background
The power electronic transformer is a novel intelligent transformer which combines a power electronic conversion technology and an electric energy conversion technology based on an electromagnetic induction principle to convert electric energy with one electric characteristic into electric energy with another electric characteristic. The three-port power electronic transformer can complete the functions of transformation, isolation, energy transfer and the like of a conventional transformer, and can also complete the functions of waveform control, power flow control or electric energy quality regulation, so that the three-port power electronic transformer has the potential of solving a plurality of new problems in a power system.
However, the existing transformer is inconvenient to use, time-consuming and labor-consuming to install and disassemble, and has no heat dissipation function, and the transformer is easy to damage after long-time loading.
Disclosure of Invention
The invention aims to solve the defects that the existing transformer is inconvenient to use, time-consuming and labor-consuming to install and disassemble, does not have a heat dissipation function, and is easy to damage the transformer due to long-time load, and provides a three-port power electronic transformer.
In order to achieve the purpose, the invention adopts the following technical scheme:
a three-port power electronic transformer comprises a transformer body, wherein a plurality of wiring ports are fixedly arranged on the transformer body, the bottom of the transformer body is fixed on a mounting frame, two mounting plates are symmetrically and slidably arranged on the mounting frame, a protective device is slidably arranged on a clamping plate mounting frame which is fixedly arranged on each of the two mounting plates, a screw rod is rotatably arranged on the mounting frame and is in threaded connection with the screw rod, a plurality of clamping grooves are formed in the mounting frame, a circular plate is fixedly arranged at one end of the screw rod, a handle is slidably arranged on the circular plate, a push plate is fixedly arranged on the protective device and is symmetrically provided with two through holes, an installation cover is fixedly arranged at the top of the transformer body, two ventilation openings are symmetrically formed in the installation cover, two filter plates are symmetrically arranged on the installation cover, a cleaning device is slidably arranged on the installation cover, and a driving motor is fixedly arranged at the top of the installation cover, the output shaft of the driving motor is fixedly provided with a driving shaft, the driving shaft is fixedly provided with a plurality of fan blades, and the driving shaft is fixedly provided with a driving device.
Preferably, the protection device comprises two sliding plates and two protection covers, the two sliding plates are all slidably mounted on the mounting frame, the protection covers are respectively fixedly mounted on the two sliding plates, two mounting holes are symmetrically formed in the mounting frame, the two sliding plates are respectively slidably mounted in the two mounting holes, and springs are respectively fixedly mounted in the two mounting holes.
Preferably, a bearing is fixedly mounted on the mounting frame, and the other end of the screw rod is fixedly connected with an inner ring of the bearing.
Preferably, a sliding hole is formed in the circular plate, the handle is slidably mounted in the sliding hole, and a pressure spring is fixedly mounted in the sliding hole.
Preferably, the cleaning device comprises two sliding rods and two brushes, the two sliding rods are both slidably mounted on the mounting cover, and the two brushes are respectively and fixedly mounted on the two sliding rods.
Preferably, the top of the mounting cover is symmetrically and fixedly provided with two fixing rods, the two fixing rods are fixedly provided with the same mounting box, and the driving motor is fixedly mounted in the mounting box.
Preferably, the driving device comprises a driving plate, an elliptical groove and two connecting blocks, the driving plate is fixedly mounted on the driving shaft, the elliptical groove is formed in the driving plate, the two connecting blocks are movably mounted in the elliptical groove, and the two connecting blocks are fixedly connected with the two sliding rods respectively.
Compared with the prior art, the invention has the advantages that:
(1) according to the scheme, the transformer body, the wiring port, the mounting frame, the mounting plate, the clamping plates, the bearing, the screw rod, the mounting hole, the sliding plate, the protective covers, the spring, the push plate, the through hole, the circular plate, the handle, the sliding hole, the pressure spring and the clamping groove are arranged, when the transformer body is mounted, the mounting frame is clamped at the mounting position, the push plate can move for a certain distance, so that the protective covers are correspondingly pushed onto the wiring port, certain protection is performed, the screw rod can be rotated to drive the two clamping plates to move to clamp and fix the mounting frame at a using position during mounting, the screw rod is not required to be worried about to be rotated and loosened, and the transformer is convenient to use;
(2) this scheme is owing to set up installation cover, vent, filter plate, slide bar, brush, dead lever, mounting box, driving motor, drive shaft, flabellum, drive plate, elliptical trough, connecting block, during the use, can drive the drive shaft through driving motor and rotate, and the drive shaft drives a plurality of flabellum and rotates and dispel the heat to the transformer, the effectual life who improves the device.
The transformer heat dissipation device is convenient to use, time-saving and labor-saving in installation and disassembly, and can dissipate heat of the transformer when in use, so that the service life of the device is effectively prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a three-port power electronic transformer according to the present invention;
FIG. 2 is a schematic diagram of a driving board and an elliptical trough structure of a three-port power electronic transformer according to the present invention;
fig. 3 is a schematic structural diagram of a portion a of fig. 1 of a three-port power electronic transformer according to the present invention;
fig. 4 is a schematic structural diagram of a portion B of fig. 1 of a three-port power electronic transformer according to the present invention;
fig. 5 is a schematic structural diagram of part C of fig. 1 of a three-port power electronic transformer according to the present invention;
fig. 6 is a schematic diagram of a three-port power electronic transformer according to the present invention, the wiring port of fig. 1.
In the figure: 1. a transformer body; 2. a wiring port; 3. a mounting frame; 4. mounting a plate; 5. a splint; 6. a bearing; 7. a screw; 8. mounting holes; 9. a slide plate; 10. a protective cover; 11. a spring; 12. pushing the plate; 13. a through hole; 14. a circular plate; 15. a handle; 16. a slide hole; 17. a pressure spring; 18. a card slot; 19. mounting a cover; 20. a vent; 21. filtering the plate; 22. a slide bar; 23. a brush; 24. fixing the rod; 25. mounting a box; 26. a drive motor; 27. a drive shaft; 28. a fan blade; 29. a drive plate; 30. an elliptical trough; 31. and (4) connecting the blocks.
Detailed Description
The technical solution in this embodiment will be clearly and completely described below with reference to the drawings in this embodiment.
Example one
Referring to fig. 1-6, a three-port power electronic transformer comprises a transformer body 1, a plurality of wiring ports 2 are fixedly installed on the transformer body 1, the bottom of the transformer body 1 is fixed on a mounting frame 3, two mounting plates 4 are symmetrically and slidably installed on the mounting frame 3, a clamping plate 5 is fixedly installed on each of the two mounting plates 4, a protection device is slidably installed on the mounting frame 3, a screw 7 is rotatably installed on the mounting frame 3, the two mounting plates 4 are both in threaded connection with the screw 7, a plurality of clamping grooves 18 are formed on the mounting frame 3, a circular plate 14 is fixedly installed at one end of the screw 7, a handle 15 is slidably installed on the circular plate 14, a push plate 12 is fixedly installed on the protection device, two through holes 13 are symmetrically formed on the push plate 12, a mounting cover 19 is fixedly installed on the top of the transformer body 1, and two ventilation openings 20 are symmetrically formed on the mounting cover 19, two filter plates 21 are symmetrically installed on the installation cover 19, a cleaning device is installed on the installation cover 19 in a sliding mode, a driving motor 26 is fixedly installed at the top of the installation cover 19, a driving shaft 27 is fixedly installed on an output shaft of the driving motor 26, a plurality of fan blades 28 are fixedly installed on the driving shaft 27, and a driving device is fixedly installed on the driving shaft 27.
In this embodiment, protection device includes two slides 9 and two safety covers 10, two equal slidable mounting of slide 9 are on mounting bracket 3, safety cover 10 is fixed mounting respectively on two slides 9, two mounting holes 8 have been seted up to the symmetry on mounting bracket 3, two slide 9 are respectively slidable mounting in two mounting holes 8, equal fixed mounting has spring 11 in two mounting holes 8, has ensured the stable slip of two slides 9, and make it can reset when not having thrust effect.
In this embodiment, the bearing 6 is fixedly installed on the mounting frame 3, and the other end of the screw rod 7 is fixedly connected with the inner ring of the bearing 6, so that smooth rotation of the screw rod 7 is ensured.
In this embodiment, a sliding hole 16 is formed in the circular plate 14, the handle 15 is slidably mounted in the sliding hole 16, and a pressure spring 17 is fixedly mounted in the sliding hole 16, so that stable sliding of the handle 15 is ensured.
In this embodiment, the cleaning device includes two sliding rods 22 and two brushes 23, the two sliding rods 22 are slidably mounted on the mounting cover 19, and the two brushes 23 are respectively and fixedly mounted on the two sliding rods 22.
In this embodiment, two fixing rods 24 are symmetrically and fixedly mounted on the top of the mounting cover 19, the same mounting box 25 is fixedly mounted on the two fixing rods 24, and the driving motor 26 is fixedly mounted in the mounting box 25, so that stable operation of the driving motor 26 is ensured.
In this embodiment, the driving device includes a driving plate 29, an elliptical groove 30 and two connecting blocks 31, the driving plate 29 is fixedly mounted on the driving shaft 27, the elliptical groove 30 is formed in the driving plate 29, the two connecting blocks 31 are movably mounted in the elliptical groove 30, and the two connecting blocks 31 are respectively fixedly connected with the two sliding rods 22, so that the driving shaft 27 can drive the two sliding rods 22 to reciprocate when rotating.
The working principle is as follows: when the transformer body 1 is used, the transformer body 1 is taken to a position to be used, the push plate 12 is pushed to move upwards for a certain distance when the transformer body is placed, the two slide plates 9 drive the two protective covers 10 to move, so that the wiring on the wiring port 2 can be protected to a certain extent, the handle 15 is pulled out from the clamping groove 18 at the position at the time, the screw 7 is rotated, the screw 7 drives the two mounting plates 4 to move, the two mounting plates 4 drive the two clamping plates 5 to move to fix the device, the stability is ensured, the handle 15 is loosened, the handle 15 is reset and clamped into the clamping groove 18 at the corresponding position at the time under the elastic force of the pressure spring 17 to ensure that the handle cannot be loosened, the driving motor 26 is connected into a power supply when the transformer body 1 is used, the driving motor 26 is started, the driving shaft 27 is driven by the driving motor 26 to rotate, and the driving shaft 27 drives the plurality of fan blades 28 to rotate to dissipate heat of the transformer body 1, meanwhile, the driving shaft 27 drives the driving plate 29 to rotate, the driving shaft 29 drives the sliding rod 22 to reciprocate, and the sliding rod 22 drives the brush 23 to move to scrape off dust on the filter plate 21, so that the heat dissipation effect is not affected.
Example two
Referring to fig. 1-6, a three-port power electronic transformer comprises a transformer body 1, a plurality of wiring ports 2 are fixedly installed on the transformer body 1, the bottom of the transformer body 1 is fixed on a mounting frame 3, two mounting plates 4 are symmetrically and slidably installed on the mounting frame 3, a clamping plate 5 is fixedly installed on each of the two mounting plates 4, a protection device is slidably installed on the mounting frame 3, a screw 7 is rotatably installed on the mounting frame 3, the two mounting plates 4 are both in threaded connection with the screw 7, a plurality of clamping grooves 18 are formed on the mounting frame 3, a circular plate 14 is fixedly installed at one end of the screw 7, a handle 15 is slidably installed on the circular plate 14, a push plate 12 is fixedly installed on the protection device, two through holes 13 are symmetrically formed on the push plate 12, a mounting cover 19 is fixedly installed on the top of the transformer body 1, and two ventilation openings 20 are symmetrically formed on the mounting cover 19, two filter plates 21 are installed to the symmetry on the installation cover 19, slidable mounting has cleaning device on the installation cover 19, the top fixed mounting of installation cover 19 has driving motor 26, fixed mounting has drive shaft 27 on driving motor 26's the output shaft, fixed mounting has a plurality of flabellum 28 on the drive shaft 27, fixed mounting has drive arrangement on the drive shaft 27, can install a warning device additional on transformer body 1, if the power electronics emergence abnormal conditions can be timely inform the staff, through the availability factor.
In this embodiment, protection device includes two slides 9 and two safety covers 10, two equal slidable mounting of slide 9 are on mounting bracket 3, safety cover 10 is fixed mounting respectively on two slides 9, two mounting holes 8 have been seted up to the symmetry on mounting bracket 3, two slide 9 are respectively slidable mounting in two mounting holes 8, equal fixed mounting has spring 11 in two mounting holes 8, has ensured the stable slip of two slides 9, and make it can reset when not having thrust effect.
In this embodiment, the bearing 6 is fixedly installed on the mounting frame 3, and the other end of the screw rod 7 is fixedly connected with the inner ring of the bearing 6, so that smooth rotation of the screw rod 7 is ensured.
In this embodiment, a sliding hole 16 is formed in the circular plate 14, the handle 15 is slidably mounted in the sliding hole 16, and a pressure spring 17 is fixedly mounted in the sliding hole 16, so that stable sliding of the handle 15 is ensured.
In this embodiment, the cleaning device includes two sliding rods 22 and two brushes 23, the two sliding rods 22 are slidably mounted on the mounting cover 19, and the two brushes 23 are respectively and fixedly mounted on the two sliding rods 22.
In this embodiment, two fixing rods 24 are symmetrically and fixedly mounted on the top of the mounting cover 19, the same mounting box 25 is fixedly mounted on the two fixing rods 24, and the driving motor 26 is fixedly mounted in the mounting box 25, so that stable operation of the driving motor 26 is ensured.
In this embodiment, the driving device includes a driving plate 29, an elliptical groove 30 and two connecting blocks 31, the driving plate 29 is fixedly mounted on the driving shaft 27, the elliptical groove 30 is formed in the driving plate 29, the two connecting blocks 31 are movably mounted in the elliptical groove 30, and the two connecting blocks 31 are respectively fixedly connected with the two sliding rods 22, so that the driving shaft 27 can drive the two sliding rods 22 to reciprocate when rotating.
The difference between the second embodiment and the first embodiment is that: install a warning device additional on transformer body 1, if the staff can be timely inforied in the unusual condition of power electronics emergence, through the availability factor.
Claims (8)
1. A three-port power electronic transformer comprises a transformer body (1) and is characterized in that a plurality of wiring ports (2) are fixedly mounted on the transformer body (1), a mounting frame (3) is fixed at the bottom of the transformer body (1), two mounting plates (4) are symmetrically and slidably mounted on the mounting frame (3), clamping plates (5) are fixedly mounted on the two mounting plates (4), a protection device is slidably mounted on the mounting frame (3), a screw rod (7) is rotatably mounted on the mounting frame (3), the two mounting plates (4) are in threaded connection with the screw rod (7), a plurality of clamping grooves (18) are formed in the mounting frame (3), a circular plate (14) is fixedly mounted at one end of the screw rod (7), a handle (15) is slidably mounted on the circular plate (14), a push plate (12) is fixedly mounted on the protection device, and two through holes (13) are symmetrically formed in the push plate (12), the top fixed mounting of transformer body (1) has installation cover (19), two vents (20) have been seted up to the symmetry on installation cover (19), two filter plates (21) are installed to the symmetry on installation cover (19), slidable mounting has cleaning device on installation cover (19), the top fixed mounting of installation cover (19) has driving motor (26), fixed mounting has drive shaft (27) on the output shaft of driving motor (26), fixed mounting has a plurality of flabellum (28) on drive shaft (27), fixed mounting has drive arrangement on drive shaft (27).
2. A three-port power electronic transformer according to claim 1, characterized in that said protection means comprise two slides (9) and two protective covers (10), both slides (9) being slidably mounted on the mounting frame (3), the protective covers (10) being fixedly mounted on both slides (9).
3. The three-port power electronic transformer according to claim 2, wherein the mounting frame (3) is symmetrically provided with two mounting holes (8), the two sliding plates (9) are slidably mounted in the two mounting holes (8), and the two mounting holes (8) are fixedly provided with springs (11).
4. A three-port power electronic transformer according to claim 1, characterized in that the bearing (6) is fixedly mounted on the mounting bracket (3), and the other end of the screw (7) is fixedly connected with the inner ring of the bearing (6).
5. The three-port power electronic transformer according to claim 1, wherein the circular plate (14) is provided with a sliding hole (16), the handle (15) is slidably mounted in the sliding hole (16), and the sliding hole (16) is fixedly provided with a pressure spring (17).
6. A three port power electronic transformer according to claim 1, characterized in that said sweeping means comprises two sliding bars (22) and two brushes (23), both sliding bars (22) being slidably mounted on the mounting cap (19), both brushes (23) being fixedly mounted on both sliding bars (22).
7. The three-port power electronic transformer of claim 1, wherein two fixing rods (24) are symmetrically and fixedly installed on the top of the installation cover (19), the same installation box (25) is fixedly installed on the two fixing rods (24), and the driving motor (26) is fixedly installed in the installation box (25).
8. A three-port power electronic transformer according to claim 1, characterized in that said driving means comprises a driving plate (29), an elliptical slot (30) and two connecting blocks (31), the driving plate (29) is fixedly mounted on the driving shaft (27), the elliptical slot (30) is formed on the driving plate (29), both connecting blocks (31) are movably mounted in the elliptical slot (30), and both connecting blocks (31) are fixedly connected with both sliding rods (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973758.3A CN113744962B (en) | 2021-08-24 | 2021-08-24 | Three-port power electronic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973758.3A CN113744962B (en) | 2021-08-24 | 2021-08-24 | Three-port power electronic transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113744962A true CN113744962A (en) | 2021-12-03 |
| CN113744962B CN113744962B (en) | 2023-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110973758.3A Active CN113744962B (en) | 2021-08-24 | 2021-08-24 | Three-port power electronic transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN113744962B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101559934B1 (en) * | 2015-05-20 | 2015-10-14 | 주태민 | Apparatus for transformer case |
| CN108788224A (en) * | 2018-05-29 | 2018-11-13 | 广州吉和电子商务有限公司 | A kind of novel folding household herringbone ladder device |
| DE212019000051U1 (en) * | 2019-09-26 | 2019-11-15 | Suzhou Huiying Textile Technology Co., Ltd. | A textile device with a fastening device |
| CN111884140A (en) * | 2020-07-17 | 2020-11-03 | 国网山东省电力公司栖霞市供电公司 | Butt-joint type wire fixing frame for eliminating heating defect of cable head in electrified mode |
| CN112399737A (en) * | 2020-09-30 | 2021-02-23 | 国网山东省电力公司龙口市供电公司 | Flow monitoring device based on electric power automation system |
| CN213070785U (en) * | 2020-07-07 | 2021-04-27 | 江西鑫尔利电力科技有限公司 | Transformer with port convenient to protect |
| CN213400764U (en) * | 2020-11-16 | 2021-06-08 | 云南高原电控制造有限公司 | Transformer safety arrangement |
| CN213815746U (en) * | 2020-09-10 | 2021-07-27 | 江苏鑫鸿电气设备有限公司 | Transformer with heat insulation function |
-
2021
- 2021-08-24 CN CN202110973758.3A patent/CN113744962B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101559934B1 (en) * | 2015-05-20 | 2015-10-14 | 주태민 | Apparatus for transformer case |
| CN108788224A (en) * | 2018-05-29 | 2018-11-13 | 广州吉和电子商务有限公司 | A kind of novel folding household herringbone ladder device |
| DE212019000051U1 (en) * | 2019-09-26 | 2019-11-15 | Suzhou Huiying Textile Technology Co., Ltd. | A textile device with a fastening device |
| CN213070785U (en) * | 2020-07-07 | 2021-04-27 | 江西鑫尔利电力科技有限公司 | Transformer with port convenient to protect |
| CN111884140A (en) * | 2020-07-17 | 2020-11-03 | 国网山东省电力公司栖霞市供电公司 | Butt-joint type wire fixing frame for eliminating heating defect of cable head in electrified mode |
| CN213815746U (en) * | 2020-09-10 | 2021-07-27 | 江苏鑫鸿电气设备有限公司 | Transformer with heat insulation function |
| CN112399737A (en) * | 2020-09-30 | 2021-02-23 | 国网山东省电力公司龙口市供电公司 | Flow monitoring device based on electric power automation system |
| CN213400764U (en) * | 2020-11-16 | 2021-06-08 | 云南高原电控制造有限公司 | Transformer safety arrangement |
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| CN113744962B (en) | 2023-12-12 |
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Effective date of registration: 20231110 Address after: No.2 HuiFu street, Fushan District, Yantai City, Shandong Province Applicant after: State Grid Shandong Yantai Fushan District Power Supply Co. Applicant after: Longkou Power Supply Company of State Grid Shandong Electric Power Company Address before: 265700 Tonghai Road, Longkou City, Yantai, Shandong 28 Applicant before: Longkou Power Supply Company of State Grid Shandong Electric Power Company |
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