CN103794423B - Air-sweeping type low-voltage arc eliminating device and chopper - Google Patents
Air-sweeping type low-voltage arc eliminating device and chopper Download PDFInfo
- Publication number
- CN103794423B CN103794423B CN201210430813.5A CN201210430813A CN103794423B CN 103794423 B CN103794423 B CN 103794423B CN 201210430813 A CN201210430813 A CN 201210430813A CN 103794423 B CN103794423 B CN 103794423B
- Authority
- CN
- China
- Prior art keywords
- arc
- leg
- extinguishing grid
- grid pieces
- flow path
- 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.)
- Active
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Circuit Breakers (AREA)
Abstract
The present invention provides a kind of arc-control device for chopper and chopper. This arc-control device includes: arc-chutes; And it being arranged in the arc extinguishing grid pieces group of arc-chutes, this arc extinguishing grid pieces group is formed by multiple arc extinguishing grid pieces are stacking; Wherein, each arc extinguishing grid pieces has a base portion and the first leg extended at equidirectional from this base portion and the second leg, thus, arc extinguishing grid pieces group has the first leg group being made up of the first leg of each arc extinguishing grid pieces and the second leg group being made up of the second leg of each arc extinguishing grid pieces, gap between this first leg group and the second leg group forms the first flow path of electric arc and air-flow, and it has Laval spout structure feature. The chopper of the present invention includes aforementioned arc-control device. The arc-control device of the present invention has good gas blast arc-quenching effect, and correspondingly, the chopper of the present invention has good connecting-disconnecting function.
Description
Technical field
The present invention relates to the arc-control device for chopper and there is the chopper of arc-control device.
Background technology
Arc-control device is the core component of chopper, and its performance directly determines the connecting-disconnecting function of chopper. Low-voltage circuit breaker generally adopts grating arc-extinguishing chamber, and relies on the magnetic blow-out power acting on electric arc to drive electric arc to enter grid, thus medium recovery strength after cooling down electric arc, improving arc voltage and arc.
On the one hand, there is the demand so that chopper and arc-control device thereof are increasingly miniaturized, on the other hand, it is undesirable that this miniaturization and cause that breaking capacity of breaker reduces, therefore, the design of arc-control device is proposed challenge.
The product of existing design improves magnetic blow-out power usually by the optimization design of contact galvanic circle and arc chute chip architecture, and then improves connecting-disconnecting function. But, although designer has paid very big effort in this respect, but do not obtain gratifying result, in other words, the product being so designed that still suffers from the space improved in connecting-disconnecting function raising.
Accordingly, there exist a kind of demand, namely provide a kind of arc-control device for chopper, it has excellent arc quenching effect, so that chopper has excellent connecting-disconnecting function. Accordingly, it would be desirable to provide a kind of chopper with such arc-control device.
Summary of the invention
According to above-mentioned shortcoming and defect, it is an object of the invention at least to solve some or all of the above-mentioned problems in the prior art.
According to a preferred embodiment of the invention, it is provided that a kind of arc-control device for chopper, including arc-chutes; And it being arranged in the arc extinguishing grid pieces group of arc-chutes, this arc extinguishing grid pieces group is formed by multiple arc extinguishing grid pieces are stacking; Wherein, each arc extinguishing grid pieces has a base portion and the first leg extended at equidirectional from this base portion and the second leg, thus, arc extinguishing grid pieces group has the first leg group being made up of the first leg of each arc extinguishing grid pieces and the second leg group being made up of the second leg of each arc extinguishing grid pieces, gap between this first leg group and the second leg group forms the first flow path of electric arc and air-flow, and this first flow path has Laval spout structure feature.Laval spout, it is sometimes referred to as De Laval noz(zle), itself being known in the prior art, Laval spout has generally arcuate internal face, has the outlet section of the entrance of convergent, the narrowest throat, flaring, air-flow constantly accelerates to throat at the entrance of convergent, locate air velocity in throat and reach velocity of sound, i.e. mach one, in outlet section, air velocity can increase further, it is achieved Supersonic Flow. In the present invention, owing to adopting Laval orifice design, therefore air-flow therein can realize Supersonic Flow, thus can improve the gas blast arc-quenching effect of the electric arc produced when dynamic/static contact in spout is separated by air-flow.
In the above preferred embodiment of the present invention, it is further preferred that there is gap to form air current flow path between the neighboring of arc extinguishing grid pieces group and the inner rim of arc-chutes. Thus, air-flow circulation can be formed in the gap, namely, can flow through by this clearance backflow porch to Laval spout from Laval spout outlet a part of gas out, thus improving the air pressure of porch, and then be conducive to further speeding up air current flow, it is achieved better gas blast arc-quenching effect.
In the above preferred embodiment of the present invention, it is further preferred that the inner rim of arc-chutes has arcuate structure at least partially. Thus, owing to adopting arcuate structure, therefore the fairshaped guiding to air-flow can be realized, so that the resistance of air-flow is reduced by the shape of arc-chutes inner rim as far as possible, and then be conducive to air-flow easily, quickly to return to Laval spout porch to increase the air pressure of there, and then be conducive to further speeding up air current flow, it is achieved better gas blast arc-quenching effect.
In the above preferred embodiment of the present invention, it is further preferred that the inner rim of arc-chutes is provided with air-flow reflection and guide plate, between the reflection of this air-flow and the neighboring of guide plate and arc extinguishing grid pieces group, there is gap to form air current flow path between. As described above, this gap can realize airflow reflux thus being advantageously implemented better gas blast arc-quenching effect.
In the above preferred embodiment of the present invention, it is further preferred that air-flow reflection and guide plate there is arcuate structure at least partially. As described above, this arcuate structure is advantageously implemented better gas blast arc-quenching effect. Compared with directly the inner rim of arc-chutes being designed as and there is arcuate structure, inner rim at arc-chutes attaches the air-flow reflection of arcuate structure can so that the manufacture of arc-chutes itself be more easy with guide plate, namely, arc-chutes itself can be designed according to actual needs, and the reflection of air-flow and guiding reflect by means of the air-flow being attached to suitable shape thereon and guide plate realizes, flexible design degree thus can be improved.
In the above preferred embodiment of the present invention, it is further preferred that the first leg group is provided with the insulation barrier identical with the shape of this side with attaching on the side forming the first flow path of the second leg group. Thus, the direct ablation insulation barrier of high-temperature electric arc rather than directly ablation arc extinguishing grid pieces, therefore can reduce the electric arc ablation to grid.
In the above preferred embodiment of the present invention, it is further preferred that insulation barrier is formed by gas exhausted material. Thus, owing to insulation barrier is formed by gas exhausted material, therefore, gas can be produced when by high-temperature electric arc ablation, advantageously reduce arc temperature, improve the thermal conductivity of electric arc and improve the air pressure in Laval spout, and then be conducive to accelerating air-flow, and then realize better gas blast arc-quenching effect.
In the above preferred embodiment of the present invention, it is further preferred that run through through hole in being provided with on the side of the base portion of arc extinguishing grid pieces of arc-chutes as gas outlet.Thus, by means of gas outlet, it is possible to derived by the gas at Laval spout outlet place, thus advantageously forming pressure reduction and then accelerating air current flow, and then better gas blast arc-quenching effect is realized.
According to a preferred embodiment of the invention, also providing for a kind of chopper, this chopper includes the arc-control device according to any of the above-described embodiment. Correspondingly, the chopper of the present invention can have good gas blast arc-quenching effect, and then has good connecting-disconnecting function.
In the above preferred embodiment of the present invention, further preferably, this chopper also includes static contact and moving contact, static contact is arranged in the first flow path, this static contact, for the air current flow direction in this first flow path, is positioned at the upstream side of the narrowest position of the first flow path. Thus, the moving contact coordinated with static contact is also correspondingly disposed in the upstream of throat's (i.e. narrowest position) of Laval spout, thus, when chopper disconnects, the initial position of the electric arc produced between dynamic/static contact is positioned at throat upstream, such that it is able to blow by means of Laval spout is accelerated, thus can obtain good gas blast arc-quenching effect, and then there is good connecting-disconnecting function.
It should be appreciated that foregoing description is only used to exemplary purpose, rather than to limit the scope of the present invention.
Accompanying drawing explanation
Above-mentioned and the further feature of the exemplary embodiment of the present invention and advantage will become readily apparent from from following detailed description with the accompanying drawing, and this description and accompanying drawing being merely cited for property purpose rather than limit the scope of the present invention by any way, wherein:
Fig. 1 is the schematic three dimensional views illustrating arc-control device according to a preferred embodiment of the invention.
Fig. 2 is the two-dimensional representation illustrating arc-control device according to a preferred embodiment of the invention.
Fig. 3 is the schematic three dimensional views of the single arc extinguishing grid pieces illustrating arc-control device according to a preferred embodiment of the invention.
Fig. 4 is the schematic three dimensional views of the arc-chutes illustrating arc-control device according to a preferred embodiment of the invention;
Fig. 5 is the schematic three dimensional views of the insulation barrier illustrating arc-control device according to a preferred embodiment of the invention.
Fig. 6 is the schematic diagram in half portion of the Laval spout of the formation illustrating arc-control device according to a preferred embodiment of the invention.
Fig. 7 is the schematic diagram illustrating the internal pressure about Laval spout as shown in Figure 6.
Fig. 8 is the schematic diagram illustrating the internal gas flow velocity about Laval spout as shown in Figure 6.
Detailed description of the invention
Each exemplary embodiment of the present invention is described below with reference to accompanying drawings.
For the present invention aforementioned and other technology contents, feature and effect, coordinate with reference in the accompanying drawing detailed description to embodiment following, can clearly present. The direction term being previously mentioned in following example, for instance: upper and lower, left and right, front or rear etc., it is only the direction with reference to accompanying drawing. Therefore, the direction term of use is used to illustrate not for limiting the present invention, additionally, in whole embodiments, identical drawing reference numeral represents identical element.
Describe chopper according to a preferred embodiment of the invention and arc-control device thereof with reference first to Fig. 1 and 2, wherein Fig. 1 is the schematic three dimensional views illustrating arc-control device, and Fig. 2 is the two-dimensional representation illustrating arc-control device. As illustrated in fig. 1 and 2, the chopper according to the present invention includes: arc-chutes 10; And it being arranged in the arc extinguishing grid pieces group 20 of arc-chutes, this arc extinguishing grid pieces group 20 is formed by multiple arc extinguishing grid pieces are stacking.
Referring concurrently to Fig. 3, it is the schematic three dimensional views illustrating the single arc extinguishing grid pieces in grid group 20 as shown in Figure 1. As it is shown on figure 3, each arc extinguishing grid pieces has a base portion 201 and the first leg 203 and the second leg 205 extended from this base portion 201 at equidirectional, between the first leg 203 and the second leg 205, there is gap 207. When multiple arc extinguishing grid pieces are stacked and form arc extinguishing grid pieces group as shown in Figure 1, arc extinguishing grid pieces group 20 correspondingly has the first leg group being made up of the first leg 203 of each arc extinguishing grid pieces, the second leg group of being made up of the second leg 205 of each arc extinguishing grid pieces, the gap that is made up of the gap 207 of each arc extinguishing grid pieces. Gap between this first leg group and the second leg group forms the spout 50(of the first flow path being used as electric arc and air-flow referring to Fig. 1 or 2), this spout has Laval spout structure feature.
As it was previously stated, the architectural feature of Laval spout itself is known, therefore, correspondingly, no longer the shape of spout 50 is repeated at this. Although Laval spout itself is known, but Laval spout is not applied to by prior art in the orifice design of the arc extinguishing grid pieces of the arc-control device of chopper, and the present inventor is through a large amount of theoretical researches and practice, proposing innovatively and be applied in arc-control device by Laval spout, this is one of present contribution to the art just.
With reference to Fig. 2, chopper according to the present invention also includes static contact 70 and moving contact (not shown), static contact 70 is arranged in spout 50, this static contact 70, for the air current flow direction (as the dotted line arrows) in this spout 50, is positioned at the upstream side of the narrowest position (so-called " throat ") of spout 50. Notice, be positioned at the upstream side of the narrowest position of spout 50 due to static contact, when dynamic/static contact closes, moving contact is naturally also positioned at the upstream side of the narrowest position of spout 50, that is, the position of the static contact 70 shown in Fig. 2 can be understood as the dynamic/static contact position when dynamic/static contact closes. So, when dynamic/static contact separates, produce the electric arc of high temperature, this high-temperature electric arc heat intensive peripheral gas, thus sharply forming high gas pressure, be positioned at the upstream side of the narrowest position of spout 50 due to dynamic/static contact, therefore the initial position of aforementioned high pressure also is located at the upstream side of the narrowest position of spout 50, and this high pressure adds flow speed and direction spout rear portion, spout downstream and gas outlet by means of Laval spout. Due to the air-flow in spout, to be from upstream to velocity of downstream increasing, and realize Supersonic Flow (this can be further described referring to Fig. 8), therefore, the air-flow in spout is very good to the gas blast arc-quenching effect of electric arc, is conducive to improving the connecting-disconnecting function of chopper.
In order to improve gas blast arc-quenching effect further, in the present invention, as illustrated in fig. 1 and 2, there is gap 60 to form air current flow path between neighboring and the inner rim of arc-chutes 10 of arc extinguishing grid pieces group 20. While flowing towards Laval spout downstream due to electric arc, the gas pressure of voltage contact area can decline to some extent, so, as indicated by the arrows of fig. 2, can be formed from spout 50 upstream extremity (bottom near Fig. 2), the throat to spout, the downstream to spout, the backward channel to gap 60 formation, the closed loop flow path to spout 50 upstream extremity, thus being conducive to improving the air pressure of spout 50 upstream extremity, further enhancing air-flow power thus realizing better gas blast arc-quenching effect.
In conjunction with reference to Fig. 4, it is the schematic three dimensional views of the arc-chutes illustrating arc-control device as shown in Figure 1. In order to improve airflow reflux speed thus further improving gas blast arc-quenching effect, in the present invention, the inner rim of arc-chutes 10 has arcuate structure 101 at least partially. In the circulation channel that gap 60 is formed, certainly exist air-flow and change nyctitropic place, air-flow is changed the place at direction place and is designed as arcuate structure and can be conducive to reducing air-flow changed course the reduction of air velocity is affected. Certainly, the shape of the inner rim of arc-chutes 10 also needs to consider some other factors, for instance the layout of other associated components.
Notice, in Fig. 1, the embodiment shown in 2 and 4, be directly the shape of the inner rim of arc-chutes is designed as the shape being conducive to air-flow to accelerate, namely adopt arcuate structure at least partially. Alternatively, it is possible to adopting the replacement scheme setting up air-flow reflection and guide plate on the inner rim of arc-chutes, the reflection of this air-flow and guide plate can adopt aforesaid part arcuate structure to design, thus advantageously reducing the adverse effect to circulation air velocity.
Now referring concurrently to Fig. 1,2 and 5, wherein Fig. 5 be illustrate as shown in Figure 1 the schematic three dimensional views of insulation barrier 30 of arc-control device. In order to reduce the high-temperature electric arc ablation to arc extinguishing grid pieces, in the present invention, the upper attaching in the side (inner side that namely two leg groups are facing with each other) forming spout 50 of the first leg group and the second leg group is provided with insulation barrier 30. The shape of this insulation barrier 30 is identical with the shape of former side face, and thus, the gap between insulation barrier 30 also complies with the construction features of Laval spout, thus being conducive to gas blast arc-quenching. In order to improve gas blast arc-quenching effect further, insulation barrier 30 can be formed by gas exhausted material, and thus insulation barrier can produce gas under the ablation of high-temperature electric arc, thus being conducive to improving air pressure, and then improves air velocity, and then is conducive to gas blast arc-quenching.
As shown in figs. 1 and 4, through hole 103 is run through being provided with on the side of the base portion of arc extinguishing grid pieces of arc-chutes as gas outlet. A part of gas of the downstream of spout 50 is discharged by through hole 103, thus being conducive to air-flow to hold flowing downstream towards, and then is conducive to gas blast arc-quenching.
As illustrated in fig. 1 and 2, the arc-control device of the present invention can also include the fixing device 40 that is fixed together by multiple arc extinguishing grid pieces. Obviously, the setting of fixing device 40 is not limited to the left and right sides being positioned at arc extinguishing grid pieces shown in figure, and it can also have other design, it might even be possible to do not fix device, and by fixing multiple grid otherwise.
Describe referring now to Fig. 6-8 present invention arc-control device Laval spout in air-blowing situation, wherein Fig. 6 is the schematic diagram in half portion of the Laval spout of the formation illustrating arc-control device according to a preferred embodiment of the invention; Fig. 7 is the schematic diagram illustrating the internal pressure about Laval spout as shown in Figure 6; Fig. 8 is the schematic diagram illustrating the internal gas flow velocity about Laval spout as shown in Figure 6. In fig. 6 it is shown that the shape of the half of the Laval spout of the arc-control device of the present invention, represented each position in spout by abscissa x and vertical coordinate y. In the figure 7, its abscissa shown in abscissa corresponding diagram 6, namely represent each location point along vent length direction; And vertical coordinate represents should the air-flow air pressure of each position. From figure 7 it can be seen that in the present invention, swimming over to downstream from spout, pressure constantly reduces.In fig. 8, its abscissa shown in abscissa corresponding diagram 6, namely represent each location point along vent length direction; And vertical coordinate represents should the air velocity of each position. From figure 8, it is seen that swim over to downstream from spout, air velocity constantly increases, and increases to mach one from 0.6 Mach, then increases to even more than 2 Mach, it is achieved thereby that Supersonic Flow, therefore, in the present invention it is possible to realize good gas blast arc-quenching effect.
Chopper according to the present invention is generally low-voltage circuit breaker, includes but not limited to, miniature circuit breaker, breaker of plastic casing and frame circuit breaker.
Although with reference on the basis of each embodiment, the present invention has been described in the description and has been illustrated in the accompanying drawings, but it will be understood to those skilled in the art that above-described embodiment is only that preferred embodiment the present invention is not limited to this. Some technical characteristic in embodiment is likely to be not required in that for solving specific technical problem, such that it is able to not or omit these technical characteristics and the formation of the solution of non-influence technique problem or technical scheme. Additionally, the feature of an embodiment, key element and/or function can suitably be mutually combined with the feature of other one or more embodiments, key element and/or function, combine or coordinate, unless this combination, combination or cooperation substantially can not be implemented.
Claims (6)
1. for an arc-control device for chopper, including:
Arc-chutes; And
Being arranged in the arc extinguishing grid pieces group of arc-chutes, this arc extinguishing grid pieces group is formed by multiple arc extinguishing grid pieces are stacking;
It is characterized in that,
Each arc extinguishing grid pieces has a base portion and the first leg extended at equidirectional from this base portion and the second leg, thus, arc extinguishing grid pieces group has the first leg group being made up of the first leg of each arc extinguishing grid pieces and the second leg group being made up of the second leg of each arc extinguishing grid pieces, gap between this first leg group and the second leg group forms the first flow path of electric arc and air-flow, described first flow path has Laval spout structure feature so that the air-flow in this first flow path realizes Supersonic Flow at the outlet section of this first flow path
Wherein, the porch of described first flow path there is gap to form air current flow path between neighboring and the inner rim of described arc-chutes of described arc extinguishing grid pieces group, so that can be back to via this air current flow path from the outlet section of described first flow path a part of gas out.
2. arc-control device as claimed in claim 1, it is characterized in that, the inner rim of described arc-chutes is provided with air-flow reflection and guide plate, between the reflection of this air-flow and the neighboring of guide plate and described arc extinguishing grid pieces group, there is gap to form described air current flow path between.
3. arc-control device as claimed in claim 2, it is characterised in that the reflection of described air-flow has arcuate structure at least partially with guide plate.
4. the arc-control device as described in one of claim 1-3, it is characterised in that described first leg group is provided with the insulation barrier identical with the shape of this side with attaching on the side forming described first flow path of described second leg group.
5. a chopper, it is characterised in that this chopper includes the arc-control device as described in one of claim 1-4.
6. chopper as claimed in claim 5, it is characterized in that, this chopper also includes static contact and moving contact, described static contact is arranged in described first flow path, this static contact, for the air current flow direction in this first flow path, is positioned at the upstream side of the narrowest position of described first flow path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210430813.5A CN103794423B (en) | 2012-11-01 | 2012-11-01 | Air-sweeping type low-voltage arc eliminating device and chopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210430813.5A CN103794423B (en) | 2012-11-01 | 2012-11-01 | Air-sweeping type low-voltage arc eliminating device and chopper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103794423A CN103794423A (en) | 2014-05-14 |
| CN103794423B true CN103794423B (en) | 2016-06-08 |
Family
ID=50669983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210430813.5A Active CN103794423B (en) | 2012-11-01 | 2012-11-01 | Air-sweeping type low-voltage arc eliminating device and chopper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103794423B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6987794B2 (en) * | 2016-06-03 | 2022-01-05 | アーベーベー・シュバイツ・アーゲーABB Schweiz AG | Gas insulation low voltage or medium voltage load cutoff switch |
| CN107644795B (en) * | 2017-09-11 | 2020-08-04 | 天津京人电器有限公司 | Low-voltage circuit breaker and arc extinguish chamber thereof |
| CN111785550A (en) * | 2020-06-11 | 2020-10-16 | 南方电网科学研究院有限责任公司 | Isolator gap device and isolator |
| CN113517163B (en) * | 2021-07-23 | 2023-02-28 | 西安理工大学 | Strong air-blowing current-limiting type arc extinguish chamber of high-voltage circuit breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859487A (en) * | 1970-06-13 | 1975-01-07 | Siemens Ag | Electric switch for aerodynamic acceleration of a plasma |
| GB2054963A (en) * | 1979-06-08 | 1981-02-18 | Bbc Brown Boveri & Cie | Circuit breaker arc guides |
| CN1835151A (en) * | 2005-02-17 | 2006-09-20 | Abb专利有限公司 | Electrical installation device with pre-arc chamber, pre-arc chamber plates and current limiting arc extinguishing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2029252C3 (en) * | 1970-06-13 | 1975-04-03 | Siemens Ag | Electric switch |
| JPH06196080A (en) * | 1992-12-25 | 1994-07-15 | Matsushita Electric Works Ltd | Arc extinguishing device |
-
2012
- 2012-11-01 CN CN201210430813.5A patent/CN103794423B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859487A (en) * | 1970-06-13 | 1975-01-07 | Siemens Ag | Electric switch for aerodynamic acceleration of a plasma |
| GB2054963A (en) * | 1979-06-08 | 1981-02-18 | Bbc Brown Boveri & Cie | Circuit breaker arc guides |
| CN1835151A (en) * | 2005-02-17 | 2006-09-20 | Abb专利有限公司 | Electrical installation device with pre-arc chamber, pre-arc chamber plates and current limiting arc extinguishing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103794423A (en) | 2014-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103794423B (en) | Air-sweeping type low-voltage arc eliminating device and chopper | |
| US11778772B2 (en) | Wireless charging device | |
| CA2858020C (en) | Turbine blade | |
| JP2018096376A (en) | Vane cooling structure | |
| CN103437889B (en) | A kind of branch's film hole structure for gas turbine engine cooling | |
| CN101998812B (en) | Heat-dissipating module | |
| JP2008002465A (en) | Turbine engine component | |
| CN109904045A (en) | A kind of contact arc-extinguishing system of breaker | |
| CN103089335A (en) | W-shaped rib channel cooling structure suitable for turbine blade backside cooling cavity | |
| CN104676677A (en) | Microwave oven | |
| JP2004104112A5 (en) | ||
| CN102156520B (en) | Server cooling device | |
| CN204792658U (en) | Take arc control device circuit breaker | |
| CN209896016U (en) | Contact arc extinguishing system of circuit breaker | |
| CN104835701B (en) | A kind of band arc-control device chopper | |
| CN106015057B (en) | Cooling fan | |
| CN208595671U (en) | Electrical apparatus box, air conditioner | |
| US11031201B2 (en) | High power and high insulation performance relay for solar photovoltaic inverter | |
| CN202917418U (en) | Air-sweeping type low voltage arc extinguishing device and breaker | |
| CN208380634U (en) | Gas turbine blade with large and small rib alternative cooling structure | |
| CN206116329U (en) | Breaker | |
| CN205282331U (en) | Low -voltage circuit breaker arc -Quenching system | |
| CN106298394B (en) | A kind of low-voltage circuit breaker structure | |
| CN108775689A (en) | Electrical apparatus box, air conditioner | |
| CN201898292U (en) | Partition plate for heat dissipation and arc extinction in medium voltage switchgear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |