Appliance switch

Abstract

The application provides an electric appliance switch, which comprises a contact system and an arc extinguishing system. The contact system comprises a first movable contact and a first stationary contact arranged correspondingly. Both the first movable contact and the first stationary contact are located in a first plane, and the first movable contact is configured to be movable in the first plane to realize contact or separation with the first stationary contact. The arc extinguishing system comprises a first arc extinguishing chamber arranged on at least one side of the first plane in a first direction, and a second arc extinguishing chamber arranged on one side of the first movable contact in a second direction, which is parallel to the first plane. In the embodiment of the application, when the current is small, most of the arcs are deflected away from the first plane in the first direction and transferred into the first arc extinguishing chamber of the arc extinguishing system. When the current is large, most of the arcs enter into the second arc extinguishing chamber in the second direction. The electric appliance switch can meet the arc extinguishing needs under different current conditions and has strong versatility.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to an electrical switch. Background Technology

[0002] During the operation of a switch, the voltage between the contacts causes a discharge in the air, forming an electric arc. Therefore, arc-extinguishing chambers are usually installed in various electrical switches such as circuit breakers and contactors to extinguish the electric arc and ensure the safe operation of electrical equipment.

[0003] The arc-extinguishing chamber is a core component of electrical switches, used to confine the spatial location of the electric arc and accelerate its extinction. A typical arc-extinguishing chamber consists of arc-extinguishing grids and side plates, and its arc-extinguishing capacity is positively correlated with the number of grids and their cross-sectional area. How to rationally arrange arc-extinguishing chambers within a limited space to meet the needs of different arc sizes has become an important issue in modern electrical switches. Summary of the Invention

[0004] This application provides an arc-extinguishing system and an electrical switch for an electrical switch, which can meet the arc-extinguishing requirements under different current conditions.

[0005] This application provides an electrical switch, including a contact system and an arc extinguishing system. The contact system includes a first moving contact and a first stationary contact, both of which are located in a first plane. The first moving contact is configured to move within the first plane to achieve contact or separation with the first stationary contact.

[0006] The arc extinguishing system includes a first arc extinguishing chamber disposed along a first direction on at least one side of a first plane, and a second arc extinguishing chamber disposed along a second direction on one side of a first moving contact, the second direction being parallel to the first plane.

[0007] In some embodiments, the first arc-extinguishing chamber includes a first sub-arc-extinguishing chamber and a second sub-arc-extinguishing chamber located on both sides of the first plane.

[0008] In some embodiments, at least one of the first sub-arc extinguishing chamber and the second sub-arc extinguishing chamber includes a plurality of stacked first grid plates, each first grid plate including a first edge near the first plane and a first arc-inducing groove formed by an inward indentation from the first edge.

[0009] In some embodiments, the contact system includes a first movable contact, the first movable point being located on the first movable contact, the first movable contact including a body portion and an arc-guiding portion disposed on at least one side of the body portion along a first direction, the extension direction of the arc-guiding portion intersecting the extension direction of the body portion and pointing towards the first arc-guiding groove.

[0010] In some embodiments, the arc-starting portion tends to move closer to the second arc-extinguishing chamber in a direction away from the body portion; and / or, the first arc-starting groove tends to move closer to the second arc-extinguishing chamber in a direction away from the first plane.

[0011] In some embodiments, the first sub-arc extinguishing chamber and the second sub-arc extinguishing chamber are symmetrically distributed on both sides of the first plane.

[0012] In some embodiments, the electrical switch further includes an arc-blocking assembly, which includes a first arc-blocking member disposed along a first direction on the side of the first sub-arc extinguishing chamber facing the contact system, and a second arc-blocking member disposed on the side of the second sub-arc extinguishing chamber facing the contact system.

[0013] The first arc-blocking member includes a first sidewall facing the contact system, and the second arc-blocking member includes a second sidewall facing the contact system. The first sidewall and the second sidewall are spaced apart to form a second channel, through which at least a portion of the electric arc generated by the contact system moves into the second arc-extinguishing chamber.

[0014] In some embodiments, the electrical switch further includes an arc-blocking component disposed on at least one side of the contact system along a first direction. The arc-blocking component includes a first portion disposed corresponding to the first arc-extinguishing chamber and a first notch formed by the first portion recessed along the first direction. At least a portion of the electric arc generated by the contact system moves into the first arc-extinguishing chamber through the first notch.

[0015] In some embodiments, the second arc-extinguishing chamber includes a third sub-arc-extinguishing chamber, and the arc-blocking assembly includes a second portion disposed along a second direction on the side of the first portion away from the contact system, the second portion including a first through hole formed through the first direction, and the third sub-arc-extinguishing chamber being located within the first through hole;

[0016] The first part includes a first inner cavity, with the first arc-extinguishing chamber located at least partially within the first inner cavity, and the first notch communicating with the first through hole through the first inner cavity.

[0017] In some embodiments, the second arc-extinguishing chamber further includes a fourth sub-arc-extinguishing chamber located along the second direction on the side of the third sub-arc-extinguishing chamber away from the contact system, and the arc-blocking assembly includes a third portion disposed along the second direction on the side of the second portion away from the first portion, and a second through hole formed by the third portion through the first direction, wherein the fourth sub-arc-extinguishing chamber is at least partially located within the second through hole;

[0018] The second part includes a second inner cavity disposed on one side of the first through hole along a third direction. The second inner cavity is connected to the first inner cavity and the second through hole respectively, and the first direction, the second direction and the third direction intersect each other.

[0019] In some embodiments, the electrical switch further includes a first arc-initiating element disposed along a third direction on one side of the first arc-extinguishing chamber and the second arc-extinguishing chamber, a first stationary contact being located on the first arc-initiating element, and the first arc-initiating element including a first portion stacked with the first arc-extinguishing chamber and a second portion stacked with the fourth sub-arc-extinguishing chamber.

[0020] In some embodiments, the electrical switch further includes a transfer device configured to generate a magnetic field that at least partially overlaps with the movement path of the electric arc, such that at least a portion of the electric arc is transferred to the first arc-extinguishing chamber under the influence of the magnetic field.

[0021] In some embodiments, the transfer device includes a permanent magnet disposed on a side of the first arc-extinguishing chamber away from the contact system along a first direction, or disposed on at least one side of the contact system along a third direction, wherein the first direction, the second direction, and the third direction intersect each other.

[0022] In some embodiments, the contact system includes a first movable contact and a second movable contact, the first movable contact being located on the first movable contact and the second movable contact including the second movable contact;

[0023] The first moving contact is located along the second direction on the side of the second moving contact closer to the second arc-extinguishing chamber, and the first arc-extinguishing chamber is located along the first direction on at least one side of the first moving contact.

[0024] In some embodiments, the second moving contact is located along a second direction on the side of the first arc-extinguishing chamber opposite to the second arc-extinguishing chamber.

[0025] This application provides an electrical switch with an arc-extinguishing system capable of meeting the arc-extinguishing requirements under different current conditions. When the current is small, most of the arc will deflect away from the first plane along a first direction and transfer to the first arc-extinguishing chamber of the arc-extinguishing system; when the current is large, most of the arc will enter the second arc-extinguishing chamber along a second direction. Therefore, the electrical switch in this application is applicable to different environments and has strong versatility. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic cross-sectional view of the electrical switch in a first plane when it is disconnected, according to an embodiment of this application.

[0028] Figure 2 This is a schematic cross-sectional view of an electrical switch in a first plane when it is closed, according to an embodiment of this application.

[0029] Figure 3 yes Figure 1 A schematic diagram of the electrical switch shown from another perspective;

[0030] Figure 4 This is a schematic diagram of a structure of an arc-extinguishing system in an electrical switch provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of a cooperative structure between the contact system and the arc extinguishing system in an electrical switch provided in this application embodiment;

[0032] Figure 6 This is a schematic diagram of another cooperative structure between the contact system and the arc extinguishing system in the electrical switch provided in the embodiments of this application;

[0033] Figure 7 This is another structural schematic diagram of the arc extinguishing system in the electrical switch provided in the embodiments of this application;

[0034] Figure 8 yes Figure 7 Schematic diagram of the structure of the central arc diaphragm assembly;

[0035] Figure 9 This is a schematic diagram of another cooperative structure between the contact system and the arc extinguishing system in the electrical switch provided in this application embodiment;

[0036] Figure 10 This is a schematic diagram of a possible cooperation structure between the second arc-extinguishing chamber and the first arc-initiating element in an electrical switch provided in this application embodiment;

[0037] Figure 11 This is a schematic diagram of a possible cooperation structure between the second insulating component and the second arc-starting component in an electrical switch provided in this application embodiment;

[0038] Figure 12 This is another structural schematic diagram of the arc extinguishing system in the electrical switch provided in the embodiments of this application;

[0039] Figure 13 This is a schematic diagram of an arc path of an electrical switch provided in an embodiment of this application;

[0040] Figure 14 This is a schematic diagram of an arc path of an electrical switch provided in an embodiment of this application;

[0041] Figure 15 This is another structural schematic diagram of the arc-blocking assembly in the electrical switch provided in the embodiments of this application;

[0042] Figure 16 This is a schematic diagram of an arc path of an electrical switch provided in an embodiment of this application;

[0043] Figure 17This is another structural schematic diagram of the arc extinguishing system in the electrical switch provided in the embodiments of this application;

[0044] Figure 18 This is a schematic diagram of a contact system in an electrical switch provided in an embodiment of this application;

[0045] Figure 19 This is a schematic diagram of another structure of the electrical switch provided in the embodiments of this application;

[0046] Figure 20 This is another structural schematic diagram of the electrical switch provided in the embodiments of this application.

[0047] Marker explanation:

[0048] 1. First arc-extinguishing chamber; 11. First sub-arc-extinguishing chamber; 12. Second sub-arc-extinguishing chamber; 13. First grid plate; 131. First arc-starting groove; 14. First gap;

[0049] 2. Second arc-extinguishing chamber; 21. Third sub-arc-extinguishing chamber; 211. Third grid plate; 212. Third gap; 22. Fourth sub-arc-extinguishing chamber; 221. Fourth grid plate; 222. Fourth gap;

[0050] 3. Contact system; 31. First moving contact; 311. First moving point; 312. Body; 313. Arc-inducing part; 32. First stationary contact; 33. Second moving contact; 331. Second moving contact;

[0051] 4. Arc-blocking assembly; 41. First part; 411. First notch; 412. First inner cavity; 413. Side baffle; 414. Outer wall; 4141. Third vent; 42. Second part; 421. First through hole; 422. Second inner cavity; 43. Third part; 431. Second through hole; 44. First insulating component; 4a. First arc-blocking component; 4a1. First side wall; 4b. Second arc-blocking component; 4b1. Second side wall;

[0052] 51. First arc-starting component; 511. First section; 512. Second section; 52. Second arc-starting component; 521. Third section; 522. Fourth section; 53. Third arc-starting component;

[0053] 6. Second insulating component; 61. First baffle; 62. Second baffle; 63. Third baffle; 64. Connecting plate; 65. First insulating plate; 651. First vent hole; 66. Guiding structure; 67. Second insulating plate; 671. Second vent hole;

[0054] 7. Transfer device; 71. Permanent magnet;

[0055] A. First plane; B. First passage; C. Second passage;

[0056] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0057] 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.

[0058] 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.

[0059] Direct current (DC) differs from alternating current (AC). AC has two zero-crossings within a cycle, which are the most favorable conditions for arc extinction. DC does not have a natural zero-crossing moment; therefore, DC electrical switches can only extinguish the arc by establishing a sufficient arc voltage. Generally, electrical switches use the magnetic blow-out effect generated by the self-excitation of the loop current to drive the arc movement. Furthermore, when the breaking current is large, the high temperature generated by the arc creates a high-voltage zone, which also drives the arc to extend into the low-voltage zone. However, under low current conditions, the magnetic blow-out and gas flow effects are very weak, resulting in slow arc movement or inability to reach the arc-extinguishing chamber, leading to long and unstable switching times. The high temperature of the arc remaining for a long time can severely damage the insulation material or cause severe burning and melting of the contacts, rendering the electrical switch malfunctioning. Therefore, there is an urgent need for an arc-extinguishing system that can simultaneously meet the arc-extinguishing requirements under both high and low current conditions.

[0060] To address the aforementioned issues, this application provides an arc-extinguishing system and an electrical switch that can simultaneously meet the breaking requirements under different current conditions. It should be noted that the electrical switches mentioned in this application include, but are not limited to, circuit breakers and contactors.

[0061] Please see Figures 1 to 3 The electrical switch includes a contact system 3, which includes a first moving contact 311 and a first stationary contact 32. Both the first moving contact 311 and the first stationary contact 32 are located in a first plane A, and the first moving contact 311 is configured to move within the first plane A to achieve contact or separation of the first stationary contact 32.

[0062] The arc extinguishing system includes a first arc extinguishing chamber 1 and a second arc extinguishing chamber 2. The first arc extinguishing chamber 1 is disposed on at least one side of the contact system 3 along a first direction X, and the second arc extinguishing chamber 2 is disposed on one side of the contact system 3 along a second direction Y. The first direction X and the second direction Y intersect.

[0063] When the electrical switch remains connected, the first moving contact 311 and the second moving contact 331 are in contact, and the internal current of the electrical switch is conducting. When the electrical switch is manually disconnected or automatically triggered to disconnect due to a fault, the first moving contact 311 will move relative to the first stationary contact 32 within the first plane A, moving away from and gradually moving away from the first stationary contact 32. During this process, an electric arc will be generated between the first moving contact 311 and the first stationary contact 32. Due to the difference in the magnitude of the current inside the electrical switch, the electric arc generated by the contact system 3 will be transferred to the first arc-extinguishing chamber 1 or the second arc-extinguishing chamber 2. Among these, in... Figure 3 The first plane A is represented by a dashed line.

[0064] Specifically, the first arc-extinguishing chamber 1 is mainly used to interrupt the electric arc generated under low current conditions. The first arc-extinguishing chamber 1 is disposed on at least one side of the first plane A along a first direction X, where the first direction X is the direction intersecting the first plane A. Optionally, the first direction X is perpendicular to the first plane A. When the internal current of the electrical switch is small, the electric arc generated by the contact system 3 is small. At this time, under the influence of the magnetic field and the Lorentz force generated by the current, the electric arc will pass through the first plane A and transfer into the first arc-extinguishing chamber 1, thereby achieving the effect of extinguishing the arc under low current conditions.

[0065] The second arc-extinguishing chamber 2 is mainly used to interrupt the electric arc generated under high current conditions. The second arc-extinguishing chamber 2 is set on one side of the first moving contact 311 along the second direction Y. The second direction Y is parallel to the first plane A, that is, the second direction Y intersects with the first direction X. Optionally, the first direction X is perpendicular to the second direction Y. When the internal current of the electrical switch is large, the electric arc generated by the contact system 3 is large. At this time, most of the electric arc and high-temperature gas will move upward along the second direction Y into the second arc-extinguishing chamber 2, realizing the extinguishing effect of the high-current electric arc.

[0066] It should be noted that under high current conditions, not all arcs will enter the second arc-extinguishing chamber 2 along the second direction Y. Some arcs and high-temperature gases will be deflected along the first direction X and enter the first arc-extinguishing chamber 1. The small portion of the arc entering the first arc-extinguishing chamber 1 cannot be sustained and will extinguish rapidly. Therefore, under high current conditions, the first arc-extinguishing chamber 1 can also play a role in assisting in extinguishing the arc.

[0067] The arc extinguishing system in this embodiment can meet the arc extinguishing requirements under different current conditions. When the current is small, most of the arc will deflect away from the first plane A along the first direction X and transfer to the first arc extinguishing chamber 1 of the arc extinguishing system; when the current is large, most of the arc will enter the second arc extinguishing chamber 2 along the second direction Y. Therefore, the arc extinguishing system in this embodiment can be applied to different environments and has strong versatility.

[0068] In some embodiments, please refer to Figures 1 to 4 The first arc-extinguishing chamber 1 includes a first sub-arc-extinguishing chamber 11 and a second sub-arc-extinguishing chamber 12 located on both sides of the first plane A.

[0069] The first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 are located on both sides of the first plane A, that is, the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 are respectively arranged on both sides of the contact system 3 along the first direction X. Specifically, the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 are distributed on both sides of the first moving contact 311 along the first direction X.

[0070] Under the influence of external forces such as the Lorentz force, the arc generated by the contact system 3 will deflect along the first direction X and leave the first plane A, thus entering the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12. It is understandable that the direction of the current in the electrical switch determines the direction of the Lorentz force; if the current direction changes, the direction of the Lorentz force will also change. Assuming that the electrical switch is open under normal conditions, the arc generated by the contact system 3 will move towards the first sub-arc-extinguishing chamber 11 under the influence of the Lorentz force; however, when the current direction inside the electrical switch changes, the arc generated by the contact system 3...

[0071] It will then move towards the second arc-extinguishing chamber 12 under the influence of the Lorentz force.

[0072] The first arc-extinguishing chamber 1 in this embodiment includes a first sub-arc-extinguishing chamber 11 and a second sub-arc-extinguishing chamber 12 located on both sides of the first plane A. This ensures that the arc can be transferred to the first arc-extinguishing chamber 1 under different current directions, thereby improving the versatility of the arc-extinguishing system and the reliability of the first arc-extinguishing chamber 1.

[0073] In some embodiments, please refer to Figure 4 and Figure 5At least one of the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 includes a plurality of stacked first grid plates 13, each first grid plate 13 including a first edge near the first plane A and a first arc-inducing groove 131 formed by indentation from the first edge.

[0074] Both the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 include multiple first grid plates 13. The first grid plates 13 have the function of enhancing cooling, i.e., surface composite. The multiple first grid plates 13 stacked together can cut the entire arc into multiple short arc segments, thereby improving the initial dielectric strength of the arc gap. Optionally, the first grid plate 13 is a plate-like structure, and the material can be copper, ferromagnetic, ceramic, etc.

[0075] A first arc-inducing groove 131 is provided on the first grid plate 13. The first arc-inducing groove 131 is located on the first edge of the first grid plate 13 near the contact system 3, and the opening of the first arc-inducing groove 131 faces the contact system 3. Under the action of the magnetic field, the electric arc can be deflected along a specific route to the depth of the first arc-inducing groove 131, and then completely enter the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12.

[0076] In this embodiment of the application, a first arc-initiating groove 131 is provided on the first grid plate 13, thereby assisting the electric arc to move deeper into the first arc-initiating groove 131 under the action of the magnetic field, so that the electric arc can be better transferred to the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12, thereby enhancing the reliability of the use of the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12.

[0077] In some embodiments, please refer to the following: Figure 1 and Figure 5 The contact system 3 includes a first moving contact 31. The first moving contact 31 includes a body portion 312 and an arc-guiding portion 313 disposed on at least one side of the body portion 312 along a first direction X. The extension direction of the arc-guiding portion 313 intersects the extension direction of the body portion 312 and points towards the first arc-guiding groove 131.

[0078] The first moving contact 311 is located on the first moving contact 31. The electric arc generated when the first moving contact 311 separates from the first stationary contact 32 is located between the first moving contact 311 and the first stationary contact 32. The arc-inducing part 313 on the first moving contact 31 is used to transfer the electric arc located at one end of the first moving contact 31 to the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12. Specifically, since the first moving contact 311 is located in the first plane A and the first moving contact 311 moves relatively within the first plane A, the electric arc located at the first moving contact 31 has a tendency to move within the first plane A. In order to make it easier for the electric arc to leave the first plane A and transfer to the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12, the present application embodiment adds an arc-initiating part 313. The arc-initiating part 313 extends from one end of the first moving contact 31 and is gradually disposed close to the first arc-initiating groove 131. That is, the arc-initiating part 313 extends away from the first plane A relative to the main body part 312. Thus, under the action of the magnetic field, the electric arc will rotate from the arc-initiating part 313 into the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12.

[0079] Optionally, the number of arc-initiating parts 313 is two and they are symmetrically arranged relative to the first plane A, with one arc-initiating part 313 pointing to the first sub-arc-extinguishing chamber 11 and the other arc-initiating part 313 pointing to the second sub-arc-extinguishing chamber 12.

[0080] In addition, please see Figure 6 In this application embodiment, another structure of the first moving contact 31 is provided. In this application embodiment, the first moving contact 31 is composed of multiple contact pieces, the arc-leading part 313 is located on the two outermost contact pieces, and the first moving contact 311 is located on the central contact piece.

[0081] In some embodiments, the arc-starting portion 313 tends to approach the second arc-extinguishing chamber 2 in a direction away from the body portion 312; and / or, the first arc-starting groove 131 tends to approach the second arc-extinguishing chamber 2 in a direction away from the first plane A.

[0082] It is understandable that the electric arc generated at the first moving contact 31, under the combined influence of the movement tendency of the first moving contact 31 itself and the air blowing effect, will tend to move along the second direction Y towards the direction closer to the second arc-extinguishing chamber 2. In order to meet the actual needs, at least one of the arc-initiating part 313 and the first arc-initiating groove 131 is configured to have a tendency to extend towards the direction closer to the second arc-extinguishing chamber 2, so that the electric arc can more easily pass through the arc-initiating part 313 and be transferred into the first arc-initiating groove 131.

[0083] In some embodiments, the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 are symmetrically distributed on both sides of the first plane A.

[0084] As described above, when the direction of the current in an electrical switch changes, the direction of arc movement also changes. Normally, when the current magnitude is constant and the current directions are opposite, the arc movement direction will be a mirror image of the first plane A. Therefore, in this embodiment, the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 are symmetrically arranged relative to the first plane A, thereby meeting the arc transfer requirements and also facilitating the structural design of the arc extinguishing system and the manufacturing of the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12.

[0085] In some embodiments, please refer to Figure 1 , Figure 7 and Figure 8 The arc-extinguishing chamber system also includes an arc-isolating component 4, which is disposed on at least one side of the contact system 3 along the first direction X. The arc-isolating component 4 includes a first part 41 corresponding to the first arc-extinguishing chamber 1, and a first notch 411 formed by the first part 41 recessed along the first direction X. At least part of the electric arc generated by the contact system 3 moves into the first arc-extinguishing chamber 1 through the first notch 411.

[0086] The arc-blocking component 4 is correspondingly disposed between the first arc-extinguishing chamber 1 and the contact system 3. The arc generated by the contact system 3 is not directly transferred to the first arc-extinguishing chamber 1, but is transferred to the first arc-extinguishing chamber 1 through the first notch 411 of the arc-blocking component 4. Specifically, the setting of the first notch 411 needs to be determined according to the direction of the magnetic field. Under the action of the magnetic field, part of the arc generated by the contact system 3 will be directionally transferred to the first notch 411 and reach the first arc-extinguishing chamber 1. Therefore, the setting of the first notch 411 can ensure that the arc enters a specific area of ​​the first arc-extinguishing chamber 1 and then continues to move along a specific path, ensuring the reliability of the arc-extinguishing process of the first arc-extinguishing chamber 1. The size and specific position of the first notch 411 need to be determined according to the actual situation, and this embodiment does not limit this.

[0087] In some embodiments, the arc-blocking assembly 4 includes a first arc-blocking member 4a disposed along a first direction X on the side of the first sub-arc-extinguishing chamber 11 facing the contact system 3, and a second arc-blocking member 4b disposed on the side of the second sub-arc-extinguishing chamber 12 facing the arc-extinguishing chamber system; wherein, the first arc-blocking member 4a includes a first sidewall 4a1 facing the contact system 3, and the second arc-blocking member 4b includes a second sidewall 4b1 facing the contact system 3, and the first sidewall 4a1 and the second sidewall 4b1 are spaced apart to form a second channel C, and at least a portion of the arc generated by the contact system 3 moves into the second arc-extinguishing chamber 2 through the second channel C.

[0088] The first arc-isolating element 4a is correspondingly disposed with the first sub-arc-extinguishing chamber 11, and the second arc-isolating element 4b is correspondingly disposed with the second sub-arc-extinguishing chamber 12. The first arc-isolating element 4a includes a first portion 41 corresponding to the first sub-arc-extinguishing chamber 11 and a first notch 411, and the second arc-isolating element 4b includes a first portion 41 corresponding to the second sub-arc-extinguishing chamber 12 and a first notch 411. The electric arc is transferred to the first sub-arc-extinguishing chamber 11 through the first notch 411 of the first arc-isolating element 4a, and to the second sub-arc-extinguishing chamber 12 through the first notch 411 of the second arc-isolating element 4b. The first arc-isolating element 4a and the second arc-isolating element 4b may have the same or different shapes and dimensions; this embodiment does not impose such limitations. Optionally, the first arc-isolating element 4a and the second arc-isolating element 4b are symmetrically distributed on both sides of the first plane A.

[0089] The first sidewall 4a1 is the surface of the first arc-isolating member 4a facing the contact system 3, i.e., the surface away from the first sub-arc-extinguishing chamber 11; the second sidewall 4b1 is the surface of the second arc-isolating member 4b facing the contact system 3, i.e., the surface away from the second sub-arc-extinguishing chamber 12. The first sidewall 4a1 and the second sidewall 4b1 are spaced apart to form a second channel C, which is connected to the second arc-extinguishing chamber 2. When the current value in the electrical switch is large, the arc generated by the contact system 3 can be transferred to the second arc-extinguishing chamber 2 through the second channel C to meet the needs of high current conditions.

[0090] It should be noted that, in addition to transferring the high-current arc to the second arc-extinguishing chamber 2, the second channel C can also transport a portion of the airflow to the second arc-extinguishing chamber 2 and then remove it from the electrical switch. Specifically, the arc is generated from the first moving contact 311 and the first stationary contact 32 in the contact system 3. Due to factors such as the arc, a high-pressure environment is easily formed near this location, while the second arc-extinguishing chamber 2 forms a relatively low-pressure environment. Therefore, under the influence of pressure, the airflow will be transferred to the second arc-extinguishing chamber 2 through the second channel C.

[0091] In some embodiments, such as Figure 1 , Figure 7 and Figure 8 As shown, the second arc-extinguishing chamber 2 includes a third sub-arc-extinguishing chamber 21, and the arc-isolating assembly 4 includes a second part 42 disposed along the second direction Y on the side of the first part 41 away from the contact system 3. The second part 42 includes a first through hole 421 formed along the first direction X, and the third sub-arc-extinguishing chamber 21 is located in the first through hole 421.

[0092] The arc-blocking assembly 4 includes a first part 41 and a second part 42. The second part 42 is located along the second direction Y on the side of the first part 41 near the third sub-arc-extinguishing chamber 21. The second part 42 and the third sub-arc-extinguishing chamber 21 overlap in the second direction Y. Therefore, to ensure the arrangement of the third sub-arc-extinguishing chamber 21, this embodiment provides a first through hole 421 in the second part 42 to avoid the third sub-arc-extinguishing chamber. Simultaneously, the third sub-arc-extinguishing chamber 21 can be disposed through the first through hole 421. This design increases the size of the third sub-arc-extinguishing chamber 21 in the first direction X, improving the arc-extinguishing reliability of the third sub-arc-extinguishing chamber 21. Optionally, the first part 41 and the second part 42 are an integral structure.

[0093] In addition, the third sub-arc extinguishing chamber 21 is connected to the first through hole 421, and the first through hole 421 is connected to the second channel C, so that the electric arc generated by the contact system 3 can directly enter the third sub-arc extinguishing chamber 21 through the second channel C.

[0094] It should be noted that, in the embodiments of this application, the second arc-extinguishing chamber 2 can be as follows: Figure 1 The diagram shows the third sub-arc-extinguishing chamber 21 and other sub-arc-extinguishing chambers; it can also be shown as follows: Figure 9 As shown, the second arc-extinguishing chamber 2 only includes the third sub-arc-extinguishing chamber 21, and this embodiment of the application does not limit this.

[0095] In some embodiments, such as Figure 1 , Figure 7 and Figure 8 As shown, the second arc-extinguishing chamber 2 also includes a fourth sub-arc-extinguishing chamber 22 located on the side of the third sub-arc-extinguishing chamber 21 away from the contact system 3 along the second direction Y. The arc-blocking assembly 4 includes a third part 43 disposed on the side of the second part 42 away from the first part 41 along the second direction Y, and a second through hole 431 formed by the third part 43 penetrating along the first direction X. The fourth sub-arc-extinguishing chamber 22 is at least partially located in the second through hole 431.

[0096] The second arc-extinguishing chamber 2 includes a third sub-arc-extinguishing chamber 21 and a fourth sub-arc-extinguishing chamber 22. This design increases the number of grid plates within the second arc-extinguishing chamber 2, thereby improving its arc-extinguishing effect. Simultaneously, the arc-blocking assembly 4 also includes a third portion 43 corresponding to the fourth sub-arc-extinguishing chamber 22, and a second through-hole 431 located in the third portion 43. The second through-hole 431 is used to avoid the fourth sub-arc-extinguishing chamber 22 and simultaneously increases the dimensional space of the fourth sub-arc-extinguishing chamber 22 in the first direction X. It should be noted that the positional relationship between the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22 in the first direction X is not limited in this application.

[0097] Optionally, the arc extinguishing system also includes a third arc ignition element 53. One end of the third arc ignition element 53 is stacked with the third sub-arc extinguishing chamber 21, and the other end is stacked with the fourth sub-arc extinguishing chamber 22. The connecting section in the middle is used to connect the two ends of the third arc ignition element 53. The third arc ignition element 53 is used to realize the arc series connection between the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 22, which is suitable for the use conditions of high current arc.

[0098] In some embodiments, such as Figure 7 and Figure 8 As shown, the arc-blocking assembly 4 also includes a first insulating member 44 disposed between the first through hole 421 and the second through hole 431.

[0099] The first insulating member 44 is disposed along the second direction Y between the first through hole 421 and the second through hole 431, that is, the first insulating member 44 is disposed between the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22. The first insulating member 44 is used to insulate a portion of the space between the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22, preventing back-side breakdown, reducing the risk of breakdown of the space between the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22, and thus preventing the arc from not passing through part of the grid in the third sub-arc-extinguishing chamber 21, affecting the arc-extinguishing effect of the second arc-extinguishing chamber 2.

[0100] Furthermore, when a third arc-starting element 53 is present, the first insulating element 44 is used to insulate the connection segment between the third sub-arc-extinguishing chamber 21 and the third arc-starting element 53, preventing the arc from directly transferring from the third sub-arc-extinguishing chamber 21 to the connection segment of the third arc-starting element 53. It should be noted that the insulation between the connection segment of the third sub-arc-extinguishing chamber 21 and the third arc-starting element 53 mentioned in this embodiment is to prevent the arc from directly transferring to the connection segment of the third arc-starting element 53, ensuring that the arc in the third sub-arc-extinguishing chamber 21 can only transfer to the fourth sub-arc-extinguishing chamber 22 through the end where the third arc-starting element 53 is stacked with the third sub-arc-extinguishing chamber 21, along the extension direction of the third arc-starting element 53, thus ensuring that the arc transfers from the third sub-arc-extinguishing chamber 21 to the fourth sub-arc-extinguishing chamber 22 along a specific path.

[0101] In some embodiments, the height of the first through hole 421 in the third direction Z is less than the height of the second through hole 431 in the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0102] The third direction Z can be the stacking direction of the first grid plate 13 in the first arc-extinguishing chamber 1, and can also be the stacking direction of the grid plates in the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22. Optionally, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0103] The first through hole 421 is used to house the third sub-arc-extinguishing chamber 21, and the second through hole 431 is used to house the fourth sub-arc-extinguishing chamber 22. It can be understood that the height of the first through hole 421 in the third direction Z is the arrangement height of the third sub-arc-extinguishing chamber 21, and the height of the second through hole 431 in the third direction Z is the arrangement height of the fourth sub-arc-extinguishing chamber 22. In this embodiment, the height of the first through hole 421 in the third direction Z is set to be less than the height of the second through hole 431 in the third direction Z, thereby allowing the fourth sub-arc-extinguishing chamber 22 to have a larger arrangement space compared to the third sub-arc-extinguishing chamber 21, improving the height and arc-extinguishing capability of the fourth sub-arc-extinguishing chamber 22.

[0104] In some embodiments, please refer to Figure 7 and Figure 10 The arc extinguishing system also includes a first arc-initiating component 51 disposed on one side of the first arc-extinguishing chamber 1 and the second arc-extinguishing chamber 2 along the third direction Z. The first arc-initiating component 51 includes a first portion 511 disposed in a stacked manner with the first arc-extinguishing chamber 1, and a second portion 512 disposed in a stacked manner with the fourth sub-arc-extinguishing chamber 22.

[0105] The first arc-initiating element 51 is located on the same side of the first arc-extinguishing chamber 1 and the fourth sub-arc-extinguishing chamber 22 along the third direction Z, becoming the arc-initiating grid of the first arc-extinguishing chamber 1 and the fourth sub-arc-extinguishing chamber 22. At the same time, the first arc-initiating element 51 can be electrically connected to the first stationary contact 32, and the arc on the first stationary contact 32 can be transferred to the first arc-extinguishing chamber 1 or the fourth sub-arc-extinguishing chamber 22 through the first arc-initiating element 51. That is, both the first arc-extinguishing chamber 1 and the fourth sub-arc-extinguishing chamber 22 can extinguish the arc on the first stationary contact 32, improving the arc-extinguishing reliability.

[0106] It should be noted that the first arc-extinguishing chamber 1 includes a first sub-arc-extinguishing chamber 11 and a second sub-arc-extinguishing chamber 12. To simultaneously meet the arc-ignition requirements of both the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12, the number of first arc-ignition elements 51 can be set to one or two. Specifically, the number of first arc-ignition elements 51 can be two, with the two first arc-ignition elements 51 arranged side-by-side in the first direction X and corresponding to the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 in the first arc-extinguishing chamber 1, respectively; or as... Figure 10 As shown, there is only one first arc-initiating element 51. A single first arc-initiating element 51 can simultaneously cover the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12. That is, a single first arc-initiating element 51 simultaneously serves as the arc-initiating grid for the first sub-arc-extinguishing chamber 11, the second sub-arc-extinguishing chamber 12, and the fourth sub-arc-extinguishing chamber 22.

[0107] In some embodiments, the arc extinguishing system further includes a second insulating member 6, which includes a first baffle 61 disposed along the third direction Z on the side of the third sub-arc extinguishing chamber 21 facing the first arc ignition member 51, and the first baffle 61 is spaced apart from the first arc ignition member 51.

[0108] The second insulating element 6 is mainly used to achieve partial insulation between the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22, so that the electric arc on the third sub-arc-extinguishing chamber 21 can only be transferred to the fourth sub-arc-extinguishing chamber 22 by the third arc-initiating element 53, thereby improving the reliability of the cooperation between the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22.

[0109] In this embodiment, a first baffle 61 is provided on the side of the second insulating member 6 near the first arc-starting member 51. The first baffle 61 can be stacked with the grid plate in the third sub-arc-extinguishing chamber 21. The first baffle 61 and the first arc-starting member 51 are spaced apart. This design can insulate the third sub-arc-extinguishing chamber 21 from the first arc-starting member 51, preventing the arc on the first stationary contact 32 from being transferred to the third sub-arc-extinguishing chamber 21 through the first arc-starting member 51. At the same time, the space between the first baffle 61 and the first arc-starting member 51 can partially accommodate the grid plate, and the grid plate in the first arc-extinguishing chamber 1 or the fourth sub-arc-extinguishing chamber 22 can extend between the first baffle 61 and the first arc-starting member 51.

[0110] In some alternative embodiments, a portion of the first grid plate 13 in the first arc-extinguishing chamber 1 extends from the first portion 41 of the arc-blocking assembly 4 to the space between the first baffle 61 and the first arc-initiating element 51, i.e., extending into the second portion 42. In this case, at least one of the first arc-extinguishing chamber 1 and the fourth sub-arc-extinguishing chamber 22 needs to be made of a non-magnetic material, including but not limited to copper and ceramics. This design prevents the arc in the first arc-extinguishing chamber 1 from transferring to the fourth sub-arc-extinguishing chamber 22.

[0111] For example, such as Figure 10 As shown, the second insulating member 6 may further include a third baffle 63 disposed along the third direction Z on the side of the third sub-arc extinguishing chamber 21 away from the first arc-inducing member 51. Both the first baffle 61 and the third baffle 63 are stacked with the grid in the third sub-arc extinguishing chamber 21. The third sub-arc extinguishing chamber 21 is used to insulate the third sub-arc extinguishing chamber 21 from the inner wall of the electrical switch, so as to prevent the arc from moving to the inner wall through the third sub-arc extinguishing chamber 21 and damaging the inner wall of the electrical switch.

[0112] In some embodiments, please refer to Figure 10 and Figure 11 The second insulating member 6 further includes a second baffle 62 disposed along the third direction Z on the side of the fourth sub-arc extinguishing chamber 22 away from the first arc ignition member 51, a connecting plate 64 for connecting the first baffle 61 and the second baffle 62, and a first insulating plate 65 disposed along the second direction Y on the side of the third sub-arc extinguishing chamber 21 near the fourth sub-arc extinguishing chamber 22; wherein the first insulating plate 65 and the connecting plate 64 are sandwiched to form a first channel B, and the first insulating plate 65 has a first exhaust hole 651 penetrating along the second direction Y.

[0113] The second baffle 62 is disposed on the side of the fourth sub-arc extinguishing chamber 22 away from the first arc-initiating element 51. The second baffle 62 also serves to insulate the fourth sub-arc extinguishing chamber 22 from the inner wall of the electrical switch, preventing the arc from moving through the fourth sub-arc extinguishing chamber 22 to the inner wall and causing damage. The first baffle 61 and the second baffle 62 are connected by a connecting plate 64. In the direction along the second direction Y, which is closer to the second baffle 62, the connecting plate 64 tends to tilt in the third direction Z, away from the first arc-initiating element 51.

[0114] The connecting section of the third arc-starting element 53 is located on the side of the connecting plate 64 away from the third arc-extinguishing chamber. The connecting plate 64 can reduce the risk of the electric arc in the third sub-arc-extinguishing chamber 21 being directly transferred to the connecting section of the third arc-starting element 53. At the same time, a first insulating plate 65 is also provided on the side of the connecting plate 64 facing the third sub-arc-extinguishing chamber 21. The first insulating plate 65 further enhances the insulation effect between the connecting section of the third sub-arc-extinguishing chamber 21 and the third arc-starting element 53.

[0115] Furthermore, in this embodiment, a first exhaust port 651 is provided on the first insulating plate 65, allowing the high-temperature airflow generated by or flowing through the third sub-arc-extinguishing chamber 21 to exit the third sub-arc-extinguishing chamber 21 through the first exhaust port 651. Simultaneously, the first insulating plate 65 and the connecting plate 64 are clamped together to form a first channel B. The high-temperature airflow leaving the third sub-arc-extinguishing chamber 21 moves through the first channel B, then moves to the side of the second baffle 62 opposite to the fourth sub-arc-extinguishing chamber 22, and finally exits the arc-extinguishing system.

[0116] Optionally, the first insulating plate 65 extends along the third direction Z, and the connecting plate 64 is inclined relative to the first insulating plate 65. That is, the extension direction of the first insulating plate 65 is the same as the stacking direction of the grid in the third sub-arc chamber 21. This design is more conducive to releasing the high-temperature airflow in the third sub-arc chamber 21.

[0117] In some embodiments, the connecting plate 64 and the second baffle 62 protrude from the side opposite to the first arc-inducing member 51 to form a guide structure 66, which is used to guide the airflow and adjust the exhaust area of ​​the third sub-arc-extinguishing chamber 21.

[0118] In some embodiments, the arc extinguishing system further includes a second insulating plate 67 disposed on the side of the fourth sub-arc extinguishing chamber 22 away from the third sub-arc extinguishing chamber 21. The second insulating plate 67 is located on the side of the second baffle 62 facing the fourth sub-arc extinguishing chamber 22, and the second insulating plate 67 has a second vent hole 671 extending along the second direction Y.

[0119] The second insulating plate 67 is located at the tail end of the second arc-extinguishing chamber 2, serving as an insulating protection element. Simultaneously, the second insulating plate 67 is provided with a second vent 671, through which the high-temperature airflow in the fourth sub-arc-extinguishing chamber 22 can exit and be released. Optionally, the second insulating plate 67 extends along a third direction Z, and the orthographic projection of the fourth sub-arc-extinguishing chamber 22 onto the second insulating plate 67 lies within the outer contour of the second insulating plate 67, allowing the second insulating plate 67 to cover the entire fourth sub-arc-extinguishing chamber 22.

[0120] In some embodiments, please refer to Figure 12 The arc extinguishing system also includes a second arc-initiating component 52 disposed along the third direction Z on one side of the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2. The second arc-initiating component 52 includes a third portion 521 stacked with the first arc extinguishing chamber 1 and a fourth portion 522 stacked with the third sub-arc extinguishing chamber 21.

[0121] The first arc-inducing element 51 and the second arc-inducing element 52 are respectively located on both sides of the first arc-extinguishing chamber 1 in the third direction Z. One end of the second arc-inducing element 52 is located at the position furthest from the first stationary contact 32 to which the first moving contact 31 can be deflected. The electric arc on the first moving contact 31 can be transferred to the first arc-extinguishing chamber 1 and the third sub-arc-extinguishing chamber 21 through the second arc-inducing element 52. Similar to the first arc-inducing element 51, the number of second arc-inducing elements 52 can also be one or two. This will not be described in detail in the embodiments of this application.

[0122] Please see Figure 13 and Figure 14 , Figure 13 This is a schematic diagram of arc formation under low current conditions. Figure 14 This diagram illustrates the formation of an electric arc under high current conditions. The arrows in the diagram indicate the path of the arc's movement. Figure 13 In this circuit, because the internal current of the electrical switch is relatively small, the generated arc can be directly transferred to the first arc-extinguishing chamber 1 through the first moving contact 31. Figure 14 In the process, due to the large current inside the electrical switch, most of the generated current will be transferred to the second arc-initiating element 52 through the first moving contact 31, and then transferred to the third sub-arc-extinguishing chamber 21 through the second arc-initiating element 52. At this time, due to the presence of the first insulating element 44 (not shown in the figure) and the second insulating element 6, the arc can only move to the fourth sub-arc-extinguishing chamber 22 through the extension direction of the third arc-initiating element 53, thereby achieving the arc-extinguishing effect.

[0123] In some embodiments, please refer to Figure 7 and Figure 15 The first part 41 includes a first inner cavity 412, and the first arc-extinguishing chamber 1 is at least partially located in the first inner cavity 412; wherein, the first notch 411 is connected to the first through hole 421 through the first inner cavity 412.

[0124] The first arc-extinguishing chamber 1 may include a first sub-arc-extinguishing chamber 11 and a second sub-arc-extinguishing chamber 12. Similarly, the first arc-isolating member 4a and the second arc-isolating member 4b may each include two first inner cavities 412 corresponding to the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12, respectively. The opening of the first inner cavity 412 corresponding to the first sub-arc-extinguishing chamber 11 is disposed away from the second sub-arc-extinguishing chamber 12 along the first direction X, and the opening of the first inner cavity 412 corresponding to the second sub-arc-extinguishing chamber 12 is disposed away from the first sub-arc-extinguishing chamber 11 along the first direction X. Optionally, a mounting groove is provided in the first inner cavity 412 for mounting the grid plates in the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12.

[0125] The first notch 411 is connected to the first through hole 421 through the first inner cavity 412. The first through hole 421 is used to set the third sub-arc extinguishing chamber 21. The connection between the first inner cavity 412 and the first through hole 421 can realize the connection between the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2, so that part of the high-temperature airflow in the first arc extinguishing chamber 1 is transferred to the third sub-arc extinguishing chamber 21 and then transferred out of the arc extinguishing system through the first channel B.

[0126] In some embodiments, the first part 41 further includes a side baffle 413 disposed on the side of the first inner cavity 412 away from the second arc-extinguishing chamber 2 along the second direction Y. The side baffle 413 can ensure that the high-temperature gas flow entering the first arc-extinguishing chamber 1 does not flow back into the contact system 3, thereby improving the reliability of the contact system 3. At the same time, the gas accumulated at the side baffle 413 can form a high-pressure environment, thereby facilitating the movement of the gas flow into the second arc-extinguishing chamber 2.

[0127] In some embodiments, the first arc-extinguishing chamber 1 includes stacked first grid plates 13 and a first gap 14 located between adjacent first grid plates 13, and the third sub-arc-extinguishing chamber 21 includes a plurality of stacked third grid plates 211 and a third gap 212 located between adjacent third grid plates 211; wherein at least a portion of the first gap 14 is in communication with the third gap 212.

[0128] The connection between the first gap 14 and the third gap 212 helps to transfer the high-temperature gas flow in the first arc-extinguishing chamber 1 to the third sub-arc-extinguishing chamber 21, improves the gas conduction capacity, and prevents the gas flow from accumulating in the first arc-extinguishing chamber 1.

[0129] In some embodiments, such as Figure 7 and Figure 15 As shown, the second part 42 includes a second inner cavity 422 disposed on one side of the first through hole 421 along the third direction Z. The second inner cavity 422 is connected to the first inner cavity 412 and the second through hole 431 respectively.

[0130] As can be seen from the foregoing, the second through hole 431 is used to set the fourth sub-arc extinguishing chamber 22. The setting of the second inner cavity 422 can realize the communication between the first arc extinguishing chamber 1 and the fourth sub-arc extinguishing chamber 22, so that the high-temperature airflow in the first arc extinguishing chamber 1 can be transmitted to the fourth sub-arc extinguishing chamber 22 and leave the arc extinguishing chamber system through the fourth sub-arc extinguishing chamber 22.

[0131] In some embodiments, the fourth sub-arc extinguishing chamber 22 includes a plurality of stacked fourth grid plates 221 and a fourth gap 222 located between adjacent fourth grid plates 221; wherein at least a portion of the first grid plate 13 extends into the second inner cavity 422, and at least a portion of the first gap 14 communicates with the fourth gap 222.

[0132] The connection between the first gap 14 and the fourth gap 222 helps to transfer the high-temperature gas flow in the first arc-extinguishing chamber 1 to the third sub-arc-extinguishing chamber 21, improves the gas conduction capacity, and prevents the gas flow from accumulating in the first arc-extinguishing chamber 1.

[0133] In the arc extinguishing system provided in the embodiments of this application, such as Figure 16 As shown, the transfer process of the high-temperature gas flow within the arc-extinguishing system can occur in three ways. In the first case, the high-temperature gas flow can be transferred to the second arc-extinguishing chamber 2 through the second channel C formed between the first arc-isolating member 4a and the second arc-isolating member 4b, and then leave the arc-extinguishing system through the second arc-extinguishing chamber 2. In the second case, the high-temperature gas flow can enter the first arc-extinguishing chamber 1 through the first notch 411, then transfer to the third sub-arc-extinguishing chamber 21 through the first inner cavity 412, and leave the arc-extinguishing system through the first channel B. In the third case, the high-temperature gas flow can enter the first arc-extinguishing chamber 1 through the first notch 411, then transfer to the second inner cavity 422 through the first inner cavity 412, and then transfer to the fourth sub-arc-extinguishing chamber 22 through the second inner cavity 422, finally leaving the arc-extinguishing system through the second exhaust port 671 corresponding to the fourth sub-arc-extinguishing chamber 22.

[0134] In some embodiments, at least one of the first arc-isolating member 4a and the second arc-isolating member 4b includes a gas-generating material.

[0135] The gas-generating material can produce gas under specific conditions. During the arc-extinguishing operation of the arc-extinguishing system, the first arc-isolating element 4a or the second arc-isolating element 4b generates gas, thereby assisting the movement of the electric arc and achieving a gas-blowing effect on the arc. Specifically, the gas generated by the first arc-isolating element 4a and the second arc-isolating element 4b can form a certain high-pressure environment near the first arc-extinguishing chamber 1 in the second channel C. Under the combined action of magnetic blowing and strong gas pressure, the arc can be directed to move towards the second arc-extinguishing chamber 2 and eventually be cut and extinguished by the grid plates inside the second arc-extinguishing chamber 2.

[0136] In some embodiments, please refer to Figure 17The first part 41 includes a plurality of outer walls 414 surrounding the outer periphery of the first arc-extinguishing chamber 1, the plurality of outer walls 414 having a first opening toward the contact system 3; wherein, the outer wall 414 includes a third vent hole 4141 extending along its own thickness direction.

[0137] In this embodiment, the first arc-extinguishing chamber 1 and the second arc-extinguishing chamber 2 are no longer interconnected. Multiple outer walls 414 enclose a space for accommodating the first arc-extinguishing chamber 1. To ensure the release of airflow within the first arc-extinguishing chamber 1, a third exhaust port 4141 is provided on the outer wall 414, allowing the gas within the first arc-extinguishing chamber 1 to be released. Optionally, at least a portion of the third exhaust port 4141 is disposed along the first direction X, penetrating the outer wall 414.

[0138] In some embodiments, please refer to Figure 18 The contact system 3 includes a first moving contact 31 and a second moving contact 33. The first moving contact 31 includes a first moving contact point 311, and the second moving contact 33 includes a second moving contact point 331. The first moving contact point 311 is located along the second direction Y on the side of the second moving contact point 331 that is close to the second arc-extinguishing chamber 2, and the first arc-extinguishing chamber 1 is located along the first direction X on at least one side of the first moving contact point 311.

[0139] The contact system 3 includes two moving contacts. The first moving contact 31 protects the second moving contact 33. Specifically, the electrical switch is activated by the contact between the second moving contact 331 on the second moving contact 33 and the corresponding stationary contact. When a fault occurs inside the electrical switch or manual disconnection is required, the second moving contact 33 drives the first moving contact 31 to deflect synchronously, separating the second moving contact 331 from the corresponding stationary contact. However, due to the presence of the first moving contact 31, no electric arc is formed at the second moving contact 331. The current in the electrical switch continues to move from the second moving contact 331 to the first moving contact 311, while the first moving contact 311 separates from the first stationary contact 32, and an electric arc is generated between the first moving contact 311 and the first stationary contact 32. Therefore, the first moving contact 31 protects the second moving contact 33, reducing the risk of damage to the second moving contact 33 due to the presence of an electric arc.

[0140] In some embodiments, such as Figure 1 and Figure 18 As shown, the second moving contact 331 is located on the side of the first arc-extinguishing chamber 1 away from the second arc-extinguishing chamber 2 along the second direction Y.

[0141] In this embodiment, the second moving contact 331 is located outside the first arc-extinguishing chamber 1, that is, the first moving contact 311 is located inside the arc-extinguishing system, while the second moving contact 331 is located outside the arc-extinguishing system. This design can avoid and further reduce the risk of the second moving contact 331 participating in the arc-extinguishing process, and play a role in protecting the second moving contact 331.

[0142] In some embodiments, please refer to Figure 19 The electrical switch also includes a transfer device 7, which is configured to generate a magnetic field that at least partially overlaps with the movement path of the electric arc, so that at least part of the electric arc is transferred to the first arc-extinguishing chamber 1 under the action of the magnetic field.

[0143] The magnetic field generated by the transfer device 7 can produce a Lorentz force, thereby changing the trajectory of the electric arc, so that at least part of the electric arc can be transferred to the first arc-extinguishing chamber 1 under the action of the magnetic field. The present application does not limit the structure and arrangement of the transfer device 7, as long as the magnetic field generated by the transfer device 7 can drive part of the electric arc to be transferred into the first arc-extinguishing chamber 1.

[0144] In some embodiments, the transfer device 7 includes a permanent magnet 71 disposed on at least one side of the contact system 3 along a third direction Z.

[0145] The permanent magnet 71 typically includes two magnets with opposite polarities. The magnetic field generated by the permanent magnet 71 can change the arc's path, helping the arc transfer into the first arc-extinguishing chamber 1. In this embodiment, the permanent magnet 71 can be a single magnet located on one side of the contact system 3, or two magnets can be arranged simultaneously on both sides of the contact system 3. For example, two permanent magnets 71 are arranged simultaneously on both sides of the contact system 3. In this case, the two permanent magnets 71 are located on the side of the first stationary contact 32 away from the first moving contact 311, and on the side of the first moving contact 311 away from the first stationary contact 32, respectively; that is, the transfer device 7 is arranged around the arc generation area. This design enables the arc to be deflected towards the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12 within the first arc-extinguishing chamber 1.

[0146] In some embodiments, please refer to Figure 20 The permanent magnet 71 is disposed on the side of the first arc-extinguishing chamber 1 away from the contact system 3 along the first direction X.

[0147] The first arc-extinguishing chamber 1 includes a first sub-arc-extinguishing chamber 11 and a second sub-arc-extinguishing chamber 12. There are two permanent magnets 71: one permanent magnet 71 is located on the side of the first sub-arc-extinguishing chamber 11 opposite to the second sub-arc-extinguishing chamber 12, and the other permanent magnet 71 is located on the side of the second sub-arc-extinguishing chamber 12 opposite to the first sub-arc-extinguishing chamber 11. The two permanent magnets 71 are symmetrically arranged. This design allows the permanent magnets 71 to be directly placed on the first arc-isolating component 4a and the second arc-isolating component 4b, thereby reducing the installation difficulty of the permanent magnets 71.

[0148] It should be noted that a single permanent magnet 71 includes two magnetic poles, an N pole and a S pole. The N pole can be located on the side of the S pole closer to the second arc-extinguishing chamber 2, or it can be located on the side of the S pole away from the second arc-extinguishing chamber 2. That is, the arrangement of the two magnetic poles with opposite polarities in a single permanent magnet 71 is not limited in the embodiments of this application.

[0149] While the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit the invention. Any person skilled in the art to which this application pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of protection of this application shall still be determined by the scope defined in the appended claims.

[0150] The above description is merely a specific embodiment of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, substitutions for other connection methods described above can be made by referring to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the scope of protection 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 scope of protection of this application.

Claims

1. An electrical switch, characterized in that, include: The contact system includes a first moving contact and a first stationary contact, both of which are located in a first plane. The first moving contact is configured to move within the first plane to achieve contact or separation with the first stationary contact. An arc-extinguishing system includes a first arc-extinguishing chamber disposed along a first direction on at least one side of the first plane, and a second arc-extinguishing chamber disposed along a second direction on one side of the first moving contact, the second direction being parallel to the first plane; An arc-blocking assembly is disposed on at least one side of the contact system along the first direction. The arc-blocking assembly includes a first portion corresponding to a first arc-extinguishing chamber and a first notch formed by the first portion recessed along the first direction. At least a portion of the arc generated by the contact system moves into the first arc-extinguishing chamber through the first notch. The second arc-extinguishing chamber includes a third sub-arc-extinguishing chamber and a fourth sub-arc-extinguishing chamber located along the second direction on the side of the third sub-arc-extinguishing chamber away from the contact system. The arc-blocking assembly includes a second portion disposed along the second direction on the side of the first portion away from the contact system and a third portion disposed along the second direction on the side of the second portion away from the first portion. The second portion includes a first through hole formed through the first direction, and the third sub-arc-extinguishing chamber is located within the first through hole. The third portion includes a second through hole formed through the first direction, and at least a portion of the fourth sub-arc-extinguishing chamber is located within the second through hole. The first part includes a first inner cavity, in which at least part of the first arc-extinguishing chamber is located, and the first notch communicates with the first through hole through the first inner cavity. The second part includes a second inner cavity disposed on one side of the first through hole along a third direction, and the second inner cavity communicates with the first inner cavity and the second through hole respectively. The first direction, the second direction and the third direction intersect each other.

2. The electrical switch according to claim 1, characterized in that, The first arc-extinguishing chamber includes a first sub-arc-extinguishing chamber and a second sub-arc-extinguishing chamber located on both sides of the first plane.

3. The electrical switch according to claim 2, characterized in that, At least one of the first sub-arc extinguishing chamber and the second sub-arc extinguishing chamber includes a plurality of stacked first grid plates, each first grid plate including a first edge near the first plane and a first arc-inducing groove formed by an inward indentation from the first edge.

4. The electrical switch according to claim 3, characterized in that, The contact system includes a first movable contact, the first movable contact point is located on the first movable contact, the first movable contact includes a body portion and an arc-guiding portion disposed on at least one side of the body portion along the first direction, the extension direction of the arc-guiding portion intersects the extension direction of the body portion and points to the first arc-guiding groove.

5. The electrical switch according to claim 4, characterized in that, The arc-starting part tends to move closer to the second arc-extinguishing chamber in a direction away from the main body; And / or, The first arc-starting groove tends to move closer to the second arc-extinguishing chamber in a direction away from the first plane.

6. The electrical switch according to claim 2, characterized in that, The first sub-arc extinguishing chamber and the second sub-arc extinguishing chamber are symmetrically distributed on both sides of the first plane.

7. The electrical switch according to claim 2, characterized in that, It also includes an arc-blocking assembly, which includes a first arc-blocking member disposed along the first direction on the side of the first sub-arc-extinguishing chamber facing the contact system, and a second arc-blocking member disposed on the side of the second sub-arc-extinguishing chamber facing the contact system; The first arc-blocking member includes a first sidewall facing the contact system, and the second arc-blocking member includes a second sidewall facing the contact system. The first sidewall and the second sidewall are spaced apart to form a second channel, through which at least a portion of the electric arc generated by the contact system moves into the second arc-extinguishing chamber.

8. The electrical switch according to claim 1, characterized in that, It also includes a first arc-starting component disposed on one side of the first arc-extinguishing chamber and the second arc-extinguishing chamber along the third direction, the first stationary contact being located on the first arc-starting component, the first arc-starting component including a first portion stacked with the first arc-extinguishing chamber and a second portion stacked with the fourth sub-arc-extinguishing chamber.

9. The electrical switch according to claim 1, characterized in that, It also includes a transfer device configured to generate a magnetic field that at least partially overlaps with the movement path of the electric arc, so that at least a portion of the electric arc is transferred to the first arc-extinguishing chamber under the action of the magnetic field.

10. The electrical switch according to claim 9, characterized in that, The transfer device includes a permanent magnet, which is disposed on the side of the first arc-extinguishing chamber away from the contact system along the first direction, or disposed on at least one side of the contact system along a third direction, wherein the first direction, the second direction, and the third direction intersect each other.

11. The electrical switch according to claim 1, characterized in that, The contact system includes a first moving contact and a second moving contact, wherein the first moving contact is located on the first moving contact and the second moving contact includes a second moving contact. Wherein, the first moving contact is located on the side of the second moving contact closer to the second arc-extinguishing chamber along the second direction, and the first arc-extinguishing chamber is located on at least one side of the first moving contact along the first direction.

12. The electrical switch according to claim 11, characterized in that, The second moving contact is located on the side of the first arc-extinguishing chamber away from the second arc-extinguishing chamber along the second direction.

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