Circuit breaker

Abstract

The invention discloses a circuit breaker. The circuit breaker comprises a contact system; the arc extinguishing system comprises an arc striking assembly and two arc extinguishing assemblies which are arranged in a spaced mode in the second direction, each arc striking assembly comprises a middle arc striking piece arranged between the two arc extinguishing assemblies, and at least part of the middle arc striking piece extends towards the contact system in the first direction; the contact system and the arc extinguishing system are arranged in the shell in a spaced mode in the first direction, the shell comprises two exhaust structures, and the two exhaust structures are arranged on the two side walls, in the second direction, of the shell respectively. According to the circuit breaker disclosed by the invention, the electric arc of the contact system can be effectively broken, and a good arc extinguishing effect is achieved.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, and in particular relates to a circuit breaker. Background Technology

[0002] In a circuit breaker, the circuit is connected and disconnected through a contact system. When the contact system is disconnected, an electric arc is generated. This arc needs to be extinguished by the arc extinguishing system in the circuit breaker to prevent the arc from damaging other internal components of the circuit breaker.

[0003] Currently, the contact system, arc-extinguishing system, and vent in circuit breakers are typically arranged sequentially in a straight line so that the arc in the contact system is extinguished by the arc-extinguishing system and then directly reaches the vent for exhaust. In this arrangement, the arc-extinguishing grid plates of the arc-extinguishing system are simple in arrangement and limited in number, making it impossible to effectively interrupt the arc generated by the contact system, resulting in poor arc-extinguishing performance. Summary of the Invention

[0004] This application provides a circuit breaker that can effectively interrupt the electric arc in the contact system and has a good arc extinguishing effect.

[0005] This application provides a circuit breaker, comprising: a contact system; an arc extinguishing system including an arc-initiating assembly and two arc-extinguishing assemblies spaced apart along a second direction, the arc-initiating assembly including an intermediate arc-initiating plate disposed between the two arc-extinguishing assemblies, at least a portion of the intermediate arc-initiating plate extending toward the contact system along a first direction; and a housing, the contact system and the arc-extinguishing system being spaced apart within the housing along the first direction, the housing including two venting structures respectively disposed on two side walls of the housing in the second direction.

[0006] In the circuit breaker described above, the arc extinguishing assembly includes multiple arc extinguishing grids arranged at intervals, and the arrangement direction of the multiple arc extinguishing grids is inclined at an angle to the first direction.

[0007] In the circuit breaker described above, in the first direction, the venting structure is disposed near the top of the sidewall, and the distance between the arc extinguishing component and the sidewall gradually decreases along the direction from the top to the bottom of the sidewall.

[0008] In the circuit breaker described above, the intermediate arc-leading piece includes a first arc-leading part and two second arc-leading parts. The two second arc-leading parts are correspondingly arranged with two arc-extinguishing components. The first arc-leading part extends toward the contact system along a first direction. The two second arc-leading parts are each connected to the end of the first arc-leading part away from the contact system, and each second arc-leading part extends toward its corresponding arc-extinguishing component.

[0009] In the circuit breaker described above, the first arc-leading part has a shaped structure, including an arc-shaped connecting part and two arc-leading parts arranged at intervals. The arc-shaped connecting part has an arc-shaped structure protruding towards the contact system. The two arc-leading parts are respectively connected to the two ends of the arc-shaped connecting part, and both arc-leading parts are arranged in a straight line structure.

[0010] The circuit breaker described above also includes: a breakdown protection component, comprising two breakdown protection elements, which are correspondingly arranged with two arc extinguishing components. Each breakdown protection element is located on the side of the corresponding arc extinguishing component near the exhaust structure. The breakdown protection element includes multiple spaced exhaust channels that penetrate the breakdown protection element along a second direction.

[0011] In the circuit breaker described above, the exhaust structure includes multiple air outlets spaced apart from each other. These multiple air outlets are arranged sequentially along a third direction, and the number and arrangement of the multiple air outlets in the two exhaust structures are the same.

[0012] The circuit breaker described above has an exhaust structure comprising three exhaust ports arranged sequentially along a third direction. The opening direction of the middle exhaust port is perpendicular to the second direction, while the opening directions of the two exhaust ports on both sides are inclined to the second direction. Furthermore, the opening directions of the two exhaust ports on both sides are both away from the middle exhaust port.

[0013] The circuit breaker described above includes a breakdown protection component comprising three exhaust zones arranged sequentially along a third direction. The three exhaust zones are respectively positioned opposite to three air outlets. Adjacent exhaust zones are separated by an isolation plate. Each exhaust zone is provided with multiple exhaust channels. Within the same exhaust zone, the multiple exhaust channels are arranged sequentially at intervals along a first direction, and the multiple exhaust channels in each exhaust zone are staggered in the first direction with the multiple exhaust channels in other exhaust zones.

[0014] In the circuit breaker described above, the contact system includes a moving contact and a stationary contact. The moving contact is rotatable and is used to contact or separate from the stationary contact. Two arc-extinguishing components are positioned opposite the moving contact and the stationary contact, respectively. The arc-initiating component also includes an arc-initiating contact piece, which is connected to the end of the arc-extinguishing component near the contact system.

[0015] The circuit breaker of this application increases the overall capacity of the arc extinguishing components by arranging two arc extinguishing components at intervals in the second direction within the housing, compared to arranging an arc extinguishing structure opposite to the contact system at the top of the housing in the first direction. Furthermore, by arranging a middle arc-initiating plate and two venting structures on the side walls for the arc extinguishing components on both sides, the circuit breaker can complete the complete process of arc initiation, arc extinguishing, and venting, thereby effectively breaking the arc and achieving a good arc extinguishing effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the internal structure of the circuit breaker according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the external structure of the circuit breaker according to an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the breakdown protection component of the circuit breaker according to an embodiment of this application;

[0020] Figure 4 This is an exploded view of the circuit breaker according to an embodiment of this application;

[0021] Figure 5 This is a schematic diagram illustrating the initial generation of an electric arc in a circuit breaker according to an embodiment of this application;

[0022] Figure 6 This is a schematic diagram illustrating the movement of the arc from the contact system to the arc extinguishing system in a circuit breaker according to an embodiment of this application.

[0023] Figure 7 This is a schematic diagram showing that the arc of the circuit breaker in this embodiment of the application is completely extinguished by entering the arc extinguishing system;

[0024] Figure 8 This is a schematic diagram showing the shape of the air outlet of the circuit breaker in an embodiment of this application;

[0025] Figure 9 This is a schematic diagram of the air outlet on the top of the circuit breaker housing according to an embodiment of this application.

[0026] Explanation of icon numbers:

[0027] 10. Contact system; 11. Moving contact; 12. Stationary contact; 20. Arc extinguishing system; 21. Arc ignition assembly; 211. Intermediate arc ignition plate; 212. First arc ignition section; 213. Second arc ignition section; 214. Arc-shaped connection section; 215. Arc ignition section; 216. Contact arc ignition plate; 217. Pad; 22. Arc extinguishing assembly; 221. Arc extinguishing grid; 30. Housing; 31. Exhaust structure; 311. Exhaust port; 312. Anti-freezing mesh; 32. Side wall; 40. Breakdown protection assembly; 41. Breakdown protection component; 411. Exhaust channel; 412. Exhaust area; 413. Isolation plate; 50. Gas generation assembly; 51. Gas generation structure;

[0028] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0029] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0030] like Figures 1 to 9 As shown, this application embodiment provides a circuit breaker, which includes: a contact system 10; an arc extinguishing system 20, including an arc ignition assembly 21 and two arc extinguishing assemblies 22 spaced apart along a second direction Y, the arc ignition assembly 21 including an intermediate arc ignition piece 211 disposed between the two arc extinguishing assemblies 22, at least a portion of the intermediate arc ignition piece 211 extending toward the contact system 10 along a first direction X; and a housing 30, in which the contact system 10 and the arc extinguishing system 20 are spaced apart along the first direction X, the housing 30 including two exhaust structures 31, the two exhaust structures 31 being respectively disposed on two side walls 32 of the housing 30 in the second direction Y.

[0031] In specific implementation, the circuit breaker of this application embodiment includes a contact system 10, an arc extinguishing system 20, and a housing 30. The contact system 10 and the arc extinguishing system 20 are disposed in the housing 30 at intervals along a first direction X. The arc extinguishing system 20 includes an arc ignition component 21 and two arc extinguishing components 22 disposed at intervals along a second direction Y. The arc ignition component 21 includes an intermediate arc ignition piece 211 disposed between the two arc extinguishing components 22. At least a portion of the intermediate arc ignition piece 211 extends toward the contact system 10 along the first direction X. The arc generated by the breakage of the contact system 10 can be transferred along the first direction X through the extended portion of the intermediate arc ignition piece 211 and divided into two parts isolated along the second direction Y. Under the arc ignition action of the intermediate arc ignition piece 211, the two parts of the arc can reach the two arc extinguishing components 22 disposed at intervals along the second direction Y for independent arc extinguishing treatment. The gas with charged particles generated after the arc extinguishing component 22 extinguishes the arc is discharged through the exhaust structure 31 on the corresponding side wall 32 to prevent the arc from reigniting and finally realize the arc breaking process.

[0032] The circuit breaker of this application embodiment increases the overall capacity of the arc extinguishing components 22 by arranging two arc extinguishing components 22 at intervals in the second direction Y inside the housing 30. Compared with the arc extinguishing structure opposite to the contact system 10 arranged at the top of the housing 30 in the first direction X, the arc extinguishing components 22 are arranged with a middle arc ignition plate 211 and two exhaust structures 31 on the two side walls 32. This enables the circuit breaker to complete the complete process of arc ignition, arc extinguishing and exhaust of the electric arc, so that the electric arc is effectively interrupted and has a good arc extinguishing effect.

[0033] like Figure 4 As shown, specifically, the circuit breaker also includes a gas generating assembly 50, which includes two gas generating structures 51. The two gas generating structures 51 are respectively arranged on both sides of the arc extinguishing assembly 22 along the third direction Z. During the transfer process, the electric arc will come into contact with the gas generating structures 51 on both sides, thereby generating gas, which will drive the electric arc to move and enable the electric arc to enter the arc extinguishing assembly 22 for arc extinguishing.

[0034] Optionally, depending on the specific structure of the circuit breaker, multiple arc-extinguishing components 22 of the arc-extinguishing system 20 can be arranged sequentially along the circumference of the housing 30. Taking the arc-extinguishing system 20 as an example, which includes four arc-extinguishing components 22, the four arc-extinguishing components 22 can be arranged facing the four sides of the housing 30 respectively, and the corresponding number of exhaust structures 31 is also four, arranged opposite to the positions of the four arc-extinguishing components 22.

[0035] like Figure 1 As shown in the embodiment of the present application, the circuit breaker includes an arc extinguishing assembly 22 comprising a plurality of arc extinguishing grids 221 spaced apart from each other, wherein the arrangement direction of the plurality of arc extinguishing grids 221 is inclined at an angle to the first direction X.

[0036] In specific implementation, the multiple arc-extinguishing grids 221 of the arc-extinguishing assembly 22 are arranged at an angle to the first direction X. Compared to the arrangement of multiple arc-extinguishing grids 221 sequentially along the first direction X, this arrangement increases the length of the arc-extinguishing assembly 22, ensuring the overall capacity of the arc-extinguishing assembly 22. Moreover, when the multiple arc-extinguishing grids 221 are arranged at an angle to the first direction X, the extension direction of each arc-extinguishing grid 221 is inclined to the second direction Y, so that the gaps between the multiple arc-extinguishing grids 221 can face the exhaust structure 31 on the side wall 32. When the arc-extinguishing grids 221 exhaust gas after arc extinguishing, the gas can directly reach the exhaust structure 31 and be discharged from the circuit breaker housing 30, avoiding the retention of gas containing charged particles in the circuit breaker housing 30 and damage to other parts inside the circuit breaker.

[0037] like Figure 1As shown in the embodiment of the present application, in the circuit breaker, in the first direction X, the exhaust structure 31 is disposed near the top of the side wall 32, and the distance between the arc extinguishing component 22 and the side wall 32 gradually decreases along the direction from the top to the bottom of the side wall 32.

[0038] In specific implementation, the distance between the arc-extinguishing component 22 and the side wall 32 gradually decreases from the top to the bottom of the side wall 32, so that the arc-extinguishing component 22 and the side wall 32 and top wall of the housing 30 can form a triangular structure. The exhaust structure 31 is set close to the top of the side wall 32. The gas generated after the arc-extinguishing component 22 extinguishes the arc is squeezed by the arc-extinguishing component 22 and the side wall 32 and flows towards the position with larger gaps, so that all the gas flows to the exhaust structure 31 and is discharged from the circuit breaker, avoiding the gas from stagnating in the housing 30 of the circuit breaker, and has the effect of promoting gas flow.

[0039] The exhaust structure 31 is located near the top of the side wall 32 and is adapted to the flow direction of the electric arc and the arc gas, so that the circuit breaker does not need to use a drive structure to drive the gas, and the gas can reach the exhaust structure 31 and be discharged by its own inertia.

[0040] like Figure 1 As shown in the embodiment of the circuit breaker of this application, the intermediate arc-leading piece 211 includes a first arc-leading part 212 and two second arc-leading parts 213. The two second arc-leading parts 213 are correspondingly arranged with two arc-extinguishing components 22. The first arc-leading part 212 extends toward the contact system 10 along the first direction X. The two second arc-leading parts 213 are all connected to the end of the first arc-leading part 212 away from the contact system 10, and each second arc-leading part 213 extends toward its corresponding arc-extinguishing component 22.

[0041] In specific implementation, when the contact system 10 breaks and generates an electric arc, the entire electric arc moves along the first direction X toward the first arc-initiating part 212. When it contacts the first arc-initiating part 212, since the first arc-initiating part 212 extends along the first direction X toward the contact system 10, the first arc-initiating part 212 can divide the entire electric arc into two parts. The two parts of the electric arc move on the two sides of the first arc-initiating part 212 in the second direction Y, and reach the two second arc-initiating parts 213 respectively. Since each second arc-initiating part 213 extends toward its corresponding arc-extinguishing component 22, the electric arc can be guided by the second arc-initiating part 213 into the corresponding arc-extinguishing component 22 for arc extinguishing.

[0042] Specifically, the first arc-inducing part 212 and the two second arc-inducing parts 213 form a Y-shaped structure. The extension direction of each second arc-inducing part 213 is the same as the extension direction of the arc-extinguishing grid 221 of the corresponding arc-extinguishing component 22, and both are inclined to the second direction X.

[0043] Furthermore, the second arc-inducing part 213 is located at the top of the arc-extinguishing assembly 22 along the first direction X. When the arc moves along the first direction X and the extension direction of the second arc-inducing part 213, it can enter the arc-extinguishing assembly 22 more evenly to extinguish the arc, thereby making full use of the capacity of the arc-extinguishing assembly 22 and ensuring the overall arc-extinguishing effect of the circuit breaker.

[0044] Specifically, the arc-starting assembly 21 also includes a pad 217, which is a triangular structure adapted to the intermediate arc-starting piece 211. It is disposed between the two second arc-starting parts 213 and the top wall of the housing 30, which can prevent the second arc-starting parts 213 from making direct contact with the housing 30, thereby preventing leakage at the housing 30 of the circuit breaker. In addition, the pad 217 can also provide an installation base for the two second arc-starting parts 213, preventing the two second arc-starting parts 213 from deforming.

[0045] like Figure 1 As shown in the embodiment of the present application, the circuit breaker has a first arc-leading part 212 with a U-shaped structure, including an arc-shaped connecting part 214 and two arc-leading parts 215 arranged at intervals. The arc-shaped connecting part 214 has an arc-shaped structure protruding towards the contact system 10. The two arc-leading parts 215 are respectively connected to the two ends of the arc-shaped connecting part 214, and both arc-leading parts 215 are arranged with a straight structure.

[0046] In specific implementation, the first arc-initiating part 212 includes an arc-shaped connecting part 214 and two arc-initiating parts 215. The two arc-initiating parts 215 are connected by the arc-shaped connecting part 214. The two arc-initiating parts 215 are arranged at intervals with a certain gap between them. After the electric arc is divided into two parts, they move along the extension direction of the two arc-initiating parts 215 respectively. Under the isolation effect of the gap between the two arc-initiating parts 215, the two parts of the electric arc will not interfere with each other.

[0047] The arc-shaped connection 214 has an arc-shaped structure that protrudes towards the contact system 10. When the entire arc reaches the arc-shaped connection 214, it can be guided to the arc-initiating parts 215 on both sides under the action of the arc-shaped structure. The arc-shaped structure improves the arc-initiating effect of the first arc-initiating part 212 and avoids the situation where the entire arc is only guided to one side of the first arc-initiating part 212, resulting in the arc passing through only one arc-extinguishing component 22.

[0048] like Figure 3 As shown, the circuit breaker of this application embodiment further includes: a breakdown protection component 40, including two breakdown protection members 41, the two breakdown protection members 41 being correspondingly arranged with two arc extinguishing components 22, each breakdown protection member 41 being disposed on one side of the corresponding arc extinguishing component 22 near the exhaust structure 31, the breakdown protection member 41 including a plurality of spaced exhaust channels 411, the exhaust channels 411 penetrating through the breakdown protection member 41 along the second direction Y.

[0049] In specific implementation, the two anti-breakdown components 41 of the anti-breakdown assembly 40 are respectively set corresponding to the two arc-extinguishing assemblies 22. Each anti-breakdown component 41 is located on the side of the corresponding arc-extinguishing assembly 22 near the exhaust structure 31. After the arc-extinguishing assembly 22 extinguishes the arc, the gas generated by the arc moves toward the exhaust structure 31. When it is discharged from the arc-extinguishing assembly 22, it passes through the anti-breakdown component 41 located on the side of the arc-extinguishing assembly 22. Since the anti-breakdown component 41 includes multiple spaced exhaust channels 411 that run through the second direction Y, the airflow passes through the anti-breakdown component 41 via different exhaust channels 411, avoiding the phenomenon of re-breakdown caused by excessive airflow accumulation. Moreover, the metal particles in the arc gas passing through the multiple exhaust channels 411 are filtered, preventing metal particles from damaging other parts of the circuit breaker. It also plays a certain role in current limiting and pressure maintaining, preventing the arc from flying out of the arc-extinguishing assembly 22 too quickly due to excessive gas generation.

[0050] like Figure 2 As shown in the embodiment of the present application, the circuit breaker includes an exhaust structure 31 comprising a plurality of air outlets 311 spaced apart from each other. The plurality of air outlets 311 are arranged sequentially along the third direction Z. The number and arrangement of the plurality of air outlets 311 in the two exhaust structures 31 are the same.

[0051] In specific implementation, the multiple air outlets 311 of the exhaust structure 31 are arranged at intervals along the third direction Z and arranged in sequence, so that the arc gas after passing through the anti-breakdown component 41 can pass through the multiple air outlets 311 respectively, so that the arc gas is divided into multiple parts and discharged again, further avoiding the situation where the arc gas is too concentrated and breaks down at the top of the arc extinguishing component 22.

[0052] The number and arrangement of the multiple air outlets 311 of the two exhaust structures 31 are the same, so that the exhaust structures 31 on both sides of the circuit breaker along the second direction Y have the same structure, thereby ensuring that the two sides of the circuit breaker have the same air output, and that the arc extinguishing components 22 on both sides of the circuit breaker are synchronized when performing arc extinguishing and air venting.

[0053] Optionally, such as Figure 9 As shown, the top of the housing 30 has an air outlet 311 that extends through the first direction X. The gas between the side wall 32 and the anti-penetration member 41 can be discharged from the side and top of the housing 30 at the same time, avoiding gas accumulation inside the housing 30 and improving the exhaust effect.

[0054] Specifically, the exhaust structure 31 also includes multiple deionization meshes 312. Each deionization mesh 312 includes multiple through holes. The multiple deionization meshes 312 are respectively located inside multiple air outlets 311. When the gas is discharged from the air outlets 311, it will pass through the deionization meshes 312 and through the smaller through holes of the deionization meshes 312. The deionization meshes 312 can eliminate electric particles in the arc gas, thereby preventing electric particles from escaping from the circuit breaker and causing damage to the external components of the circuit breaker.

[0055] like Figure 8 As shown in the embodiment of the present application, the circuit breaker has an exhaust structure 31 comprising three exhaust ports 311 arranged sequentially along the third direction Z. The opening direction of the middle exhaust port 311 is perpendicular to the second direction Y, and the opening direction of the two exhaust ports 311 on both sides is inclined to the second direction Y. The opening directions of the two exhaust ports 311 on both sides are both away from the middle exhaust port 311.

[0056] In specific implementation, there are three air outlets 311, and two of them are symmetrically located on both sides of the middle air outlet 311. When the exhaust structure 31 exhausts, it can achieve symmetry in the third direction Z, ensuring the overall exhaust balance of the exhaust structure 31.

[0057] In the design of the opening direction of the vent 311, the opening direction of the middle vent 311 is perpendicular to the second direction Y, while the opening directions of the two vents 311 on both sides are inclined to the second direction Y, and the opening directions of the two vents 311 on both sides are away from the middle vent 311. When the exhaust structure 31 is venting, the exhaust directions of the two vents 311 on both sides are away from the exhaust direction of the middle vent 311, and the exhaust gases from the three will not interfere with each other, thereby avoiding the situation of re-breakdown caused by excessive accumulation of arc gas.

[0058] Optionally, there can be multiple air outlets 311, which are sequentially arranged in the third direction Z. The multiple air outlets 311 are symmetrically arranged relative to the circuit breaker's plane of symmetry perpendicular to the third direction Z, and the air outlets 311 on both sides of the plane of symmetry both have air outlet directions away from the plane of symmetry. This arrangement also ensures balanced exhaust and prevents arc re-breakdown.

[0059] like Figure 3As shown in the embodiment of the present application, the circuit breaker includes a breakdown protection component 41 comprising three exhaust zones 412 arranged sequentially along the third direction Z. The three exhaust zones 412 are respectively positioned opposite to three air outlets 311. Adjacent exhaust zones 412 are separated by an isolation plate 413. Each exhaust zone 412 is provided with multiple exhaust channels 411. Within the same exhaust zone 412, the multiple exhaust channels 411 are arranged sequentially at intervals along the first direction X, and the multiple exhaust channels 411 in each exhaust zone 412 are staggered in the first direction X with the multiple exhaust channels 411 in other exhaust zones 412.

[0060] In practical implementation, the three exhaust zones 412 of the anti-breakdown component 41 are respectively set corresponding to the three outlets 311 of the exhaust structure 31. At the anti-breakdown component 41, the arc gas can be divided into three parts and enter the three exhaust zones 412 respectively, and then enter the corresponding three outlets 311 from the three exhaust zones 412, and finally be discharged in different directions. The three exhaust zones 412 are isolated from each other by the isolation plates 413, so that the three parts of arc gas are set independently in the three exhaust zones 412 and do not interfere with each other, thus avoiding the phenomenon of re-breakdown of arc gas during the transfer process from the anti-breakdown component 41 to the exhaust structure 31.

[0061] Within the same exhaust zone 412, multiple exhaust channels 411 are arranged sequentially at intervals along the first direction X, and the multiple exhaust channels 411 in each exhaust zone 412 are staggered in the first direction X with the multiple exhaust channels 411 in other exhaust zones 412. Due to the stacked arrangement of the arc-extinguishing grid plates 221 of the arc-extinguishing assembly 22, the gas generated by the arc is discharged through the gaps between adjacent arc-extinguishing grid plates 221. The staggered arrangement of the exhaust channels 411 in different exhaust zones 412 allows different exhaust channels 411 to be positioned opposite to the gaps of different arc-extinguishing grid plates 221, enabling the arc gas to smoothly enter and be discharged into the corresponding exhaust channel 411. Furthermore, the staggered arrangement of the exhaust channels 411 also prevents the phenomenon of excessive arc gas accumulation leading to re-breakdown.

[0062] Optionally, the anti-penetration component 41 may include a plurality of exhaust zones 412 arranged sequentially along the third direction Z, the number and position of the exhaust zones 412 corresponding to the air outlet 311.

[0063] In the circuit breaker of this application embodiment, the contact system 10 includes a moving contact 11 and a stationary contact 12. The moving contact 11 is rotatably configured to contact or separate from the stationary contact 12. Two arc-extinguishing components 22 are respectively positioned opposite to the moving contact 11 and the stationary contact 12. The arc-initiating component 21 also includes a contact arc-initiating piece 216, which is connected to the end of the arc-extinguishing component 22 near the contact system 10.

[0064] In specific implementation, such as Figure 5 As shown, an electric arc is generated when the moving contact 11 and the stationary contact 12 separate. The arc lengthens along the second direction Y as the moving contact 11 rotates. When the moving contact 11 rotates to its final position, i.e., when it reaches the position of one of the arc-extinguishing components 22, the arc length reaches its maximum. Figure 6 As shown, at this time, the arc moves upward along the first direction X, and simultaneously, under the arc-initiating action of the contact arc-initiating piece 216, the arc near the contact arc-initiating piece 216 can be introduced into the arc-extinguishing assembly 22 for arc extinguishing; as Figure 7 As shown, the entire arc eventually enters the arc-extinguishing assembly 22 for extinguishing. Therefore, during the arc transfer along the first direction X, a portion of the arc can be extinguished simultaneously, improving the overall arc-extinguishing effect of the circuit breaker.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0066] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A circuit breaker characterized by, include: Contact system (10); The arc extinguishing system (20) includes an arc-initiating assembly (21) and two arc-extinguishing assemblies (22) spaced apart along a second direction (Y). The arc-initiating assembly (21) includes an intermediate arc-initiating piece (211) disposed between the two arc-extinguishing assemblies (22). At least a portion of the intermediate arc-initiating piece (211) extends toward the contact system (10) along a first direction (X). The housing (30) is provided in the housing (30) with the contact system (10) and the arc extinguishing system (20) spaced apart along the first direction (X). The housing (30) includes two exhaust structures (31), which are respectively provided on the two side walls (32) of the housing (30) in the second direction (Y).

2. The circuit breaker of claim 1, wherein, The arc extinguishing assembly (22) includes a plurality of arc extinguishing grids (221) arranged at intervals, and the arrangement direction of the plurality of arc extinguishing grids (221) is inclined at an angle to the first direction (X).

3. The circuit breaker according to claim 2, characterized in that, In the first direction (X), the exhaust structure (31) is disposed close to the top of the side wall (32), and the distance between the arc extinguishing component (22) and the side wall (32) gradually decreases along the direction from the top to the bottom of the side wall (32).

4. The circuit breaker according to claim 1, characterized in that, The intermediate arc-starting plate (211) includes a first arc-starting part (212) and two second arc-starting parts (213). The two second arc-starting parts (213) are correspondingly arranged with the two arc-extinguishing components (22). The first arc-starting part (212) extends toward the contact system (10) along the first direction (X). The two second arc-starting parts (213) are all connected to the end of the first arc-starting part (212) away from the contact system (10), and each second arc-starting part (213) extends toward its corresponding arc-extinguishing component (22).

5. The circuit breaker of claim 4, wherein, The first arc-leading part (212) has a U-shaped structure, including an arc-shaped connecting part (214) and two arc-leading parts (215) arranged at intervals. The arc-shaped connecting part (214) has an arc-shaped structure protruding towards the contact system (10). The two arc-leading parts (215) are respectively connected to the two ends of the arc-shaped connecting part (214), and both arc-leading parts (215) are arranged in a straight line structure.

6. The circuit breaker of claim 1, wherein, Also includes: The anti-breakdown assembly (40) includes two anti-breakdown components (41), which are correspondingly arranged with the two arc-extinguishing assemblies (22). Each anti-breakdown component (41) is located on one side of the corresponding arc-extinguishing assembly (22) near the exhaust structure (31). Each anti-breakdown component (41) includes a plurality of spaced exhaust channels (411), which pass through the anti-breakdown component (41) along the second direction (Y).

7. The circuit breaker of claim 6, wherein, The exhaust structure (31) includes a plurality of air outlets (311) spaced apart from each other. The plurality of air outlets (311) are arranged sequentially along a third direction (Z). The number and arrangement of the plurality of air outlets (311) of the two exhaust structures (31) are the same.

8. The circuit breaker of claim 7, wherein, The exhaust structure (31) includes three exhaust ports (311) arranged sequentially along the third direction (Z). The opening direction of the middle exhaust port (311) is perpendicular to the second direction (Y), and the opening direction of the exhaust ports (311) on both sides is inclined to the second direction (Y). The opening directions of the two exhaust ports (311) on both sides are both away from the middle exhaust port (311).

9. The circuit breaker of claim 8, wherein, The anti-penetration component (41) includes three exhaust zones (412) arranged sequentially along the third direction (Z). The three exhaust zones (412) are respectively positioned opposite to the three air outlets (311). Adjacent exhaust zones (412) are separated by a partition plate (413). Each exhaust zone (412) is provided with multiple exhaust channels (411). In the same exhaust zone (412), the multiple exhaust channels (411) are arranged sequentially at intervals along the first direction (X), and the multiple exhaust channels (411) in each exhaust zone (412) are staggered with the multiple exhaust channels (411) in other exhaust zones (412) in the first direction (X).

10. The circuit breaker of claim 1, wherein, The contact system (10) includes a moving contact (11) and a stationary contact (12). The moving contact (11) is rotatably configured to contact or separate from the stationary contact (12). The two arc-extinguishing components (22) are respectively positioned opposite to the moving contact (11) and the stationary contact (12). The arc-initiating assembly (21) further includes an arc-initiating contact piece (216), which is connected to the end of the arc-extinguishing assembly (22) near the contact system (10).

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