CN116844894A

CN116844894A - Arc extinguishing system of electric switch and electric switch

Info

Publication number: CN116844894A
Application number: CN202210297273.1A
Authority: CN
Inventors: 张森林; 孙健焜; 刘毅; 骆琳; 易颖
Original assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd
Current assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2023-10-03

Abstract

The application provides an arc extinguishing system of an electric switch and the electric switch, wherein the electric switch comprises a contact system, the arc extinguishing system comprises a first arc extinguishing chamber, a second arc extinguishing chamber and an arc isolation assembly, and the first arc extinguishing chamber is arranged on at least one side of the contact system along a first direction; the second arc extinguishing chamber is arranged on one side of the contact system along a second direction, and the first direction is intersected with the second direction. The arc isolation assembly is arranged on at least one side of the contact system along a first direction, the arc isolation assembly comprises a first part which is arranged corresponding to the first arc extinguishing chamber, and a first notch which is formed by the first part in a recessed mode along the first direction, and at least part of electric arc generated by the contact system moves into the first arc extinguishing chamber through the first notch. The arc extinguishing system in the embodiment of the application can meet the arc extinguishing requirements under different current conditions, and has stronger universality.

Description

Arc extinguishing system of electric switch and electric switch

Technical Field

The application relates to the technical field of electrical equipment, in particular to an arc extinguishing system of an electrical switch and the electrical switch.

Background

During the operation of the switch, the voltage between the contacts causes the air medium to discharge, forming an arc. Therefore, in various electrical switches such as a circuit breaker and a contactor, an arc extinguishing chamber is generally arranged to extinguish an arc so as to ensure the operation safety of electrical equipment.

The arc chute is a core component in an electrical switch for limiting the arc spatial position and accelerating the arc extinction. The common arc extinguishing chamber consists of arc extinguishing grid plates and side plates, and the arc extinguishing capacity of the arc extinguishing chamber is positively related to the number of the grid plates and the cross-sectional area of the arc extinguishing chamber. How to reasonably arrange the arc extinguishing chambers in a limited space so as to meet the requirements of different electric arcs becomes an important problem in the current electric switch.

Disclosure of Invention

The embodiment of the application provides an arc extinguishing system of an electric switch and the electric switch, which can meet the arc extinguishing requirements under different current conditions.

In a first aspect, an embodiment of the present application provides an arc extinguishing system of an electrical switch, the electrical switch including a contact system, the arc extinguishing system including: the first arc extinguishing chamber is arranged on at least one side of the contact system along a first direction; the second arc extinguishing chamber is arranged on one side of the contact system along a second direction, and the first direction is intersected with the second direction.

The arc isolation assembly is arranged on at least one side of the contact system along a first direction, the arc isolation assembly comprises a first part which is arranged corresponding to the first arc extinguishing chamber, and a first notch which is formed by the first part in a recessed mode along the first direction, and at least part of electric arc generated by the contact system moves into the first arc extinguishing chamber through the first notch.

In some embodiments, the second arc chute includes a third sub-arc chute, the arc isolation assembly includes a second portion disposed along the second direction on a side of the first portion remote from the contact system, the second portion includes a first through hole formed therethrough along the first direction, and the third sub-arc chute is disposed within the first through hole.

In some embodiments, the second arc chute further comprises a fourth sub-arc chute located on a side of the third sub-arc chute remote from the contact system along the second direction, the arc isolation assembly comprises a third portion disposed on a side of the second portion remote from the first portion along the second direction, and a second through hole formed through the third portion along the first direction, and the fourth sub-arc chute is at least partially located within the second through hole.

In some embodiments, the arc isolation assembly further comprises a first insulator disposed between the first and second through holes.

In some embodiments, the arc extinguishing system further comprises a first arc striking member arranged on one side of the first arc extinguishing chamber and one side of the second arc extinguishing chamber along the third direction, the first arc striking member comprises a first subsection arranged in a lamination manner with the first arc extinguishing chamber and a second subsection arranged in a lamination manner with the fourth sub-arc extinguishing chamber, and the first direction, the second direction and the third direction are intersected in pairs.

In some embodiments, the arc extinguishing system further comprises a second insulating member including a first baffle disposed along the third direction on a side of the third sub-arc extinguishing chamber facing the first arc striking member, the first baffle being disposed in spaced relation to the first arc striking member.

In some embodiments, the second insulating member further includes a second baffle disposed on a side of the fourth sub-arc-extinguishing chamber facing away from the first arc striking member along the third direction, a connection plate for connecting the first baffle and the second baffle, and a first insulating plate disposed on a side of the third sub-arc-extinguishing chamber facing toward the fourth sub-arc-extinguishing chamber along the second direction;

the first insulating plate and the connecting plate are clamped to form a first channel, and the first insulating plate is provided with a first exhaust hole penetrating along a second direction.

In some embodiments, the arc extinguishing system further comprises a second insulating plate arranged on one side of the fourth sub-arc extinguishing chamber, which is away from the third sub-arc extinguishing chamber, wherein the second insulating plate is positioned on one side of the second baffle, which is towards the fourth sub-arc extinguishing chamber, and a second exhaust hole penetrating along a second direction is formed in the second insulating plate.

In some embodiments, the arc extinguishing system further comprises a second arc striking member arranged on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along a third direction, the second arc striking member comprises a third subsection arranged in a lamination manner with the first arc extinguishing chamber and a fourth subsection arranged in a lamination manner with the third sub-arc extinguishing chamber, and the first direction, the second direction and the third direction are intersected in pairs.

In some embodiments, the first portion includes a first interior cavity in which the first arc chute is at least partially located;

wherein, first breach passes through first inner chamber and first through-hole intercommunication.

In some embodiments, the first arc chute includes a plurality of first gate sheets arranged in a stack and a first gap between adjacent first gate sheets, and the third sub arc chute includes a plurality of third gate sheets arranged in a stack and a third gap between adjacent third gate sheets;

wherein at least a portion of the first void communicates with the third void.

In some embodiments, the first portion includes a first interior cavity in which the first arc chute is at least partially located, and the second portion includes a second interior cavity disposed on one side of the first through hole along the third direction, the second interior cavity being in communication with the first interior cavity and the second through hole, respectively.

In some embodiments, the first arc chute includes a plurality of first gate sheets arranged in a stack and a first gap between adjacent first gate sheets, and the fourth sub arc chute includes a plurality of fourth gate sheets arranged in a stack and a fourth gap between adjacent fourth gate sheets;

at least part of the first grid plate extends to the second inner cavity, and at least part of the first gap is communicated with the fourth gap.

In some embodiments, the first arc extinguishing chamber comprises a first sub arc extinguishing chamber and a second sub arc extinguishing chamber which are respectively arranged at two sides of the contact system along a first direction, and the arc isolation assembly comprises a first arc isolation piece arranged at one side of the first sub arc extinguishing chamber facing the contact system and a second arc isolation piece arranged at one side of the second sub arc extinguishing chamber facing the contact system;

wherein, first arc separation piece includes towards the first lateral wall of contact system, and the second arc separation piece includes towards the second lateral wall of contact system, and first lateral wall and second lateral wall interval set up and form the second passageway, and at least part electric arc moves into the second explosion chamber through the second passageway.

In some embodiments, at least one of the first arc baffle and the second arc baffle comprises a gas generating material.

In some embodiments, the first portion includes a plurality of outer walls surrounding the first arc chute at a peripheral side thereof, the plurality of outer walls having a first opening toward the contact system;

wherein the outer wall comprises a third vent hole penetrating along the thickness direction

In some embodiments, the first arc chute includes a plurality of first grid plates disposed in a stack, the first grid plates including a first edge facing the contact system, and a first arcing groove formed by the first edge being recessed inwardly.

In a second aspect, an embodiment of the present application further provides an electrical switch, including the arc extinguishing system of any one of the foregoing embodiments.

In some embodiments, the contact system includes a first moving contact including a first moving contact and a second moving contact including a second moving contact;

the first movable contact is located on one side of the second movable contact, close 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 movable contact along the first direction.

In some embodiments, the first moving contact includes a body portion and an arc striking portion disposed on at least one side of the body portion along a first direction, and an extending direction of the arc striking portion intersects an extending direction of the body portion.

In some embodiments, the electrical switch further comprises a transfer device configured to generate a magnetic field that at least partially overlaps the path of movement of the arc such that at least a portion of the arc is transferred to the first arc chute by the magnetic field.

In some embodiments, the transfer device comprises a permanent magnet disposed on a side of the first arc chute facing away from the contact system in a first direction or disposed on at least one side of the contact system in a third direction, the first direction, the second direction, and the third direction intersecting one another.

The embodiment of the application provides an arc extinguishing system of an electric switch and the electric switch, wherein the arc extinguishing system can meet the arc extinguishing requirements under different current conditions, and when the current is smaller, most of the arc can deflect away from a first plane along a first direction and is transferred into a first arc extinguishing chamber of the arc extinguishing system; when the current is large, most of the arc enters the second arc extinguishing chamber along the second direction. Therefore, the arc extinguishing system in the embodiment of the application can be suitable for different environments and has stronger universality.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are needed to be used in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

Fig. 1 is a schematic cross-sectional view of an electrical switch according to an embodiment of the present application in a first plane when the electrical switch is turned off;

FIG. 2 is a schematic cross-sectional view of an electrical switch according to an embodiment of the present application in a first plane when the electrical switch is closed;

FIG. 3 is a schematic view of the electrical switch of FIG. 1 from another perspective;

fig. 4 is a schematic structural diagram of an arc extinguishing system in an electrical switch according to an embodiment of the present application;

Fig. 5 is a schematic diagram of a mating structure of a contact system and an arc extinguishing system in an electrical switch according to an embodiment of the present application;

fig. 6 is a schematic diagram of another mating structure of a contact system and an arc extinguishing system in an electrical switch according to an embodiment of the present application;

fig. 7 is a schematic diagram of another structure of an arc extinguishing system in an electrical switch according to an embodiment of the present application;

FIG. 8 is a schematic view of the arc assembly of FIG. 7;

fig. 9 is a schematic diagram of a mating structure of a contact system and an arc extinguishing system in an electrical switch according to an embodiment of the present application;

fig. 10 is a schematic diagram of a matching structure of a second arc extinguishing chamber and a first arc striking member in an electrical switch according to an embodiment of the present application;

fig. 11 is a schematic diagram of a matching structure of a second insulating member and a second striking member in an electrical switch according to an embodiment of the present application;

fig. 12 is a schematic diagram of another structure of an arc extinguishing system in an electric switch according to an embodiment of the present application;

FIG. 13 is a schematic diagram of an arc path of an electrical switch provided by an embodiment of the present application;

FIG. 14 is a schematic diagram of an arc path of an electrical switch provided by an embodiment of the present application;

FIG. 15 is a schematic view of another embodiment of an arc module in an electrical switch according to the present application;

FIG. 16 is a schematic diagram of an arc path of an electrical switch provided by an embodiment of the present application;

fig. 17 is a schematic diagram of another structure of an arc extinguishing system in an electrical switch according to an embodiment of the present application;

fig. 18 is a schematic structural view of a contact system in an electrical switch according to an embodiment of the present application;

FIG. 19 is a schematic view of still another embodiment of an electrical switch according to the present application;

fig. 20 is a schematic diagram of still another structure of an electrical switch according to an embodiment of the present application.

Marking:

1. a first arc extinguishing chamber; 11. a first sub-arc extinguishing chamber; 12. a second sub-arc extinguishing chamber; 13. a first gate sheet; 131. a first arc striking groove; 14. a first void;

2. a second arc extinguishing chamber; 21. a third sub-arc extinguishing chamber; 211. a third grid sheet; 212. a third void; 22. a fourth sub-arc extinguishing chamber; 221. a fourth gate sheet; 222. a fourth void;

3. a contact system; 31. a first moving contact; 311. a first movable contact; 312. a body portion; 313. an arc striking part; 32. a first stationary contact; 33. a second moving contact; 331. a second movable contact;

4. an arc isolation assembly; 41. a first portion; 411. a first notch; 412. a first lumen; 413. side baffles; 414. an outer wall; 4141. a third exhaust hole; 42. a second portion; 421. a first through hole; 422. a second lumen; 43. a third section; 431. a second through hole; 44. a first insulating member; 4a, a first arc isolation piece; 4a1, a first side wall; 4b, a second arc isolation piece; 4b1, a second side wall;

51. A first arc striking member; 511. a first subsection; 512. a second subsection; 52. a second arc striking member; 521. a third subsection; 522. a fourth division; 53. a third arc striking member;

6. a second insulating member; 61. a first baffle; 62. a second baffle; 63. a third baffle; 64. a connecting plate; 65. a first insulating plate; 651. a first exhaust hole; 66. a guide structure; 67. a second insulating plate; 671. a second exhaust hole;

7. a transfer device; 71. a permanent magnet;

A. a first plane; B. a first channel; C. a second channel;

x, a first direction; y, second direction; z, third direction.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the application only and not limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The direct current is different from the alternating current, and the alternating current has two zero crossings in a period, so that the most favorable arc quenching condition is realized. The direct current does not have the moment of natural zero crossing, so the direct current electric switch can only realize arc extinction by establishing enough arc voltage. In general, the electric switch adopts the magnetic blowing effect generated by self-excitation of loop current to drive the electric arc to move, and in addition, when the break-off current is larger, the high temperature generated by the electric arc can form a high-voltage area and can drive the electric arc to extend to a low-voltage area. However, the magnetic blowing and gas flowing effects under small current are very weak, the arc movement is slow or can not move into the arc extinguishing chamber, and the on-off time of the electrical switch can become long and unstable. The high temperature of the electric arc which stays for a long time can cause the insulation material to be seriously damaged or the contact to be seriously ablated and welded, so that the electrical switch cannot normally operate. There is a need for an arc extinguishing system that can meet the arc extinguishing requirements under both high and low current conditions.

Based on the problems, the embodiment of the application provides an arc extinguishing system of an electric switch and the electric switch, which can simultaneously meet the breaking requirements under different current conditions. It should be noted that the electrical switch according to the embodiment of the present application includes, but is not limited to, a circuit breaker and a contactor.

Referring to fig. 1 to 3, the electrical switch includes a contact system 3, where the contact system 3 includes a first movable contact 311 and a first stationary contact 32 that are disposed correspondingly, the first movable contact 311 and the first stationary contact 32 are both located in a first plane a, and the first movable contact 311 is configured to be movable in the first plane a to achieve contact or separation of the first stationary contact 32.

The arc extinguishing system comprises a first arc extinguishing chamber 1 and a second arc extinguishing chamber 2, wherein the first arc extinguishing chamber 1 is arranged on at least one side of the contact system 3 along a first direction X, the second arc extinguishing chamber 2 is arranged on one side of the contact system 3 along a second direction Y, and the first direction X is intersected with the second direction Y.

When the electric switch is communicated, the first movable contact 311 and the second movable contact 331 are in an abutting state, and the internal current of the electric switch is conducted; when the electrical switch is opened manually or automatically triggered by a fault, the first movable contact 311 moves relatively in the first plane a, moves away from and gradually moves away from the first stationary contact 32, during which an arc is generated between the first movable contact 311 and the first stationary contact 32, and the arc generated by the contact system 3 is transferred to the first arc extinguishing chamber 1 or the second arc extinguishing chamber 2 due to different current levels inside the electrical switch. Wherein the first plane a is indicated in fig. 3 in the form of a dashed line.

Specifically, the first arc extinguishing chamber 1 is mainly used for breaking an arc generated under a small current condition. The first arc extinguishing chamber 1 is arranged on at least one side of the first plane a along a first direction X, which is a 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 smaller, the electric arc generated by the contact system 3 is smaller, and at the moment, the electric arc can pass out of the first plane A and be transferred into the first arc-extinguishing chamber 1 under the influence of the Lorentz force generated by the magnetic field and the current, so that the arc extinguishing effect under the condition of small current is realized.

The second arc extinguishing chamber 2 is mainly used for breaking an arc generated under the condition of high current, the second arc extinguishing chamber 2 is arranged on one side of the first movable contact 311 along a second direction Y, and the second direction Y is parallel to the first plane A, namely, the second direction Y intersects with the first direction X, and 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, and most of the electric arc and high-temperature gas can move upwards into the second arc-extinguishing chamber 2 along the second direction Y, so that the extinguishing effect of the large-current electric arc is realized.

It should be noted that, under the condition of a large current, not all the electric arcs enter the second arc-extinguishing chamber 2 along the second direction Y, but some electric arcs and high-temperature gas deflect along the first direction X into the first arc-extinguishing chamber 1, wherein a small part of the electric arcs entering the first arc-extinguishing chamber 1 cannot be maintained and are extinguished rapidly. The first arc-extinguishing chamber 1 can thus also act as an auxiliary extinguishing of the arc in the case of high currents.

The arc extinguishing system in the embodiment of the application can meet the arc extinguishing requirements under different current conditions, and when the current is smaller, most of the arc can deflect away from a first plane A along a first direction X and is transferred into a first arc extinguishing chamber 1 of the arc extinguishing system; when the current is large, most of the arc enters the second arc chute 2 in the second direction Y. Therefore, the arc extinguishing system in the embodiment of the application can be suitable for different environments and has stronger universality.

In some embodiments, referring to fig. 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 respectively located at both sides of the first plane a.

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, respectively, i.e. the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 are arranged on both sides of the contact system 3 along the first direction X, respectively, specifically the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 are distributed on both sides of the first movable contact 311 along the first direction X.

The arc generated by the contact system 3 is deflected in the first direction X and out of the first plane a into the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12 by an external force such as a lorentz force. It will be appreciated that the direction of the current in the electrical switch determines the direction of the lorentz force, which changes if the direction of the current is changed. Assuming that the electrical switch is opened under normal conditions, the arc generated by the contact system 3 will be transferred towards the first sub-arc-extinguishing chamber 11 under the action of lorentz forces; when the current direction inside the electric switch is changed, the electric arc generated by the contact system 3

It will be transferred towards the second sub-arc chute 12 by the lorentz force.

The first arc-extinguishing chamber 1 in the embodiment of the application comprises the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 which are positioned at two sides of the first plane A, so that the condition that the electric arc can be transferred into the first arc-extinguishing chamber 1 under the condition of different current directions can be met, and the universality of an arc-extinguishing system and the reliability of the first arc-extinguishing chamber 1 are improved.

In some embodiments, referring to fig. 4 and 5, at least one of the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 includes a plurality of first gate sheets 13 stacked, the first gate sheets 13 including a first edge adjacent to the first plane a, and a first arc striking groove 131 formed by the first edge being recessed inward.

The first sub-arc-extinguishing chambers 11 and the second sub-arc-extinguishing chambers 12 comprise a plurality of first grid plates 13, the first grid plates 13 have the effect of enhancing cooling, namely surface recombination, and the plurality of first grid plates 13 are arranged in a stacked manner to cut the whole arc into a plurality of sections of short arcs, so that the initial dielectric strength of an arc gap is improved. Alternatively, the first grid 13 has a plate-like structure, and the material may be copper, ferromagnetic, ceramic, or the like.

The first grid 13 is provided with a first arc striking groove 131, the first arc striking groove 131 is arranged on a first edge of the first grid 13, which is close to the contact system 3, and an opening of the first arc striking groove 131 faces the contact system 3. Under the action of the magnetic field, the arc can deflect to the depth of the first arc striking groove 131 along a specific route, and then completely enter the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12.

According to the embodiment of the application, the first arc striking groove 131 is arranged on the first grid plate 13, so that the auxiliary arc moves to the depth of the first arc striking groove 131 under the action of the magnetic field, the arc can be better transferred into the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12, and the use reliability of the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 is enhanced.

In some embodiments, referring to fig. 1 and fig. 5 together, the contact system 3 includes a first moving contact 31, the first moving contact 31 includes a body portion 312 and an arc striking portion 313 disposed on at least one side of the body portion 312 along a first direction X, and an extending direction of the arc striking portion 313 intersects an extending direction of the body portion 312 and points to the first arc striking slot 131.

The first moving contact 311 is located on the first moving contact 31, and an arc generated by separating the first moving contact 311 from the first stationary contact 32 is located between the first moving contact 311 and the first stationary contact 32, and an arc striking portion 313 on the first moving contact 31 is used for transferring the 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 movable contact 311 is located in the first plane a and the first movable contact 311 is relatively moved in the first plane a, the arc located at the first movable contact 31 has a tendency to move in the first plane a. In order to make the electric arc more easily leave the first plane a and transfer to the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12, the embodiment of the present application adds the arc striking portion 313, and the arc striking portion 313 extends from one end of the first moving contact 31 and gradually approaches the first arc striking slot 131, i.e. the arc striking portion 313 extends away from the first plane a relative to the body portion 312, so that under the action of the magnetic field, the electric arc rotates from the arc striking portion 313 into the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12.

Alternatively, the number of arc striking parts 313 is two and symmetrically arranged with respect to the first plane a, wherein one arc striking part 313 is directed to the first sub-arc extinguishing chamber 11 and the other arc striking part 313 is directed to the second sub-arc extinguishing chamber 12.

In addition, referring to fig. 6, the embodiment of the present application further provides another structure of the first moving contact 31, in the embodiment of the present application, the first moving contact 31 is formed by a plurality of contact blades, the arc striking portion 313 is located on the two outermost contact blades, and the first moving contact 311 is located on the central contact blade.

In some embodiments, the striking portion 313 has a tendency to approach the second arc chute 2 in a direction away from the body portion 312; and/or the first arc striking groove 131 has a tendency to approach the second arc extinguishing chamber 2 in a direction away from the first plane a.

It will be appreciated that the arc generated at the first moving contact 31 will have a tendency to move in the second direction Y towards the second extinguishing chamber 2 under the combined influence of the movement tendency of the first moving contact 31 itself and the blowing action. In order to meet the actual situation, at least one of the arc striking portion 313 and the first arc striking groove 131 is provided to have a tendency to extend in a direction close to the second arc extinguishing chamber 2, so that the arc can more easily pass through the arc striking portion 313 and be transferred into the first arc striking groove 131.

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.

From the foregoing, it can be seen that when the direction of the current in the appliance switch is changed, the arc moving direction is also changed. In general, when the current is constant and the current direction is opposite, the moving direction of the arc is mirrored with respect to the first plane a. Therefore, the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 are symmetrically arranged relative to the first plane A, so that the arc transfer requirement can be met, the structural design of the arc-extinguishing system and the manufacture of the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 are facilitated,

in some embodiments, referring to fig. 1, 7 and 8, the arc extinguishing chamber system further includes an arc isolation assembly 4, the arc isolation assembly 4 is disposed on at least one side of the contact system 3 along the first direction X, the arc isolation assembly 4 includes a first portion 41 corresponding to the first arc extinguishing chamber 1, and a first notch 411 formed by recessing the first portion 41 along the first direction X, and at least part of the arc generated by the contact system 3 moves into the first arc extinguishing chamber 1 through the first notch 411.

The arc isolation component 4 is correspondingly arranged between the first arc extinguishing chamber 1 and the contact system 3, and the arc generated by the contact system 3 is not directly transferred into the first arc extinguishing chamber 1, but is transferred into the first arc extinguishing chamber 1 through the first notch 411 of the arc isolation component 4. Specifically, the arrangement of the first notch 411 needs to be determined according to the magnetic field direction, and part of the arc generated by the contact system 3 will be directionally transferred into the first notch 411 and reach the first arc-extinguishing chamber 1 under the action of the magnetic field, so that the arrangement of the first notch 411 can ensure that the arc enters into a specific area of the first arc-extinguishing chamber 1 and then moves continuously along a specific path, thereby ensuring the reliability of the arc-extinguishing process of the first arc-extinguishing chamber 1. The size and specific positional relationship of the first notch 411 need to be determined according to practical situations, which is not limited in the embodiment of the present application.

In some embodiments, the arc-isolation assembly 4 comprises a first arc-isolation member 4a arranged on the side of the first sub-arc-extinguishing chamber 11 facing the contact system 3 along the first direction X, and a second arc-isolation member 4b arranged on the side of the second sub-arc-extinguishing chamber 12 facing the arc-extinguishing chamber system; wherein the first arc-isolating member 4a comprises a first side wall 4a1 facing one side of the contact system 3, the second arc-isolating member 4b comprises a second side wall 4b1 facing the contact system 3, the first side wall 4a1 and the second side wall 4b1 are arranged at intervals to form a second channel C, and at least part of the arc generated by the contact system 3 moves into the second arc extinguishing chamber 2 through the second channel C.

The first arc-isolating member 4a is arranged corresponding to the first sub-arc-extinguishing chamber 11, the second arc-isolating member 4b is arranged corresponding to the second sub-arc-extinguishing chamber 12, the first arc-isolating member 4a comprises a first portion 41 corresponding to the first sub-arc-extinguishing chamber 11 and a first notch 411, and the second arc-isolating member 4b comprises a first portion 41 corresponding to the second sub-arc-extinguishing chamber 12 and a first notch 411. The arc is transferred to the first sub-arc-extinguishing chamber 11 through the first gap 411 of the first arc-separating member 4a and to the second sub-arc-extinguishing chamber 12 through the first gap 411 of the second arc-separating member 4 b. The shape and size of the first arc-isolating member 4a and the second arc-isolating member 4b may be the same or different, which is not limited in the embodiment of the present application. Alternatively, the first arc-isolating piece 4a and the second arc-isolating piece 4b are symmetrically distributed on two sides of the first plane a.

The first side wall 4a1 is the surface of the first arc-separating member 4a facing the contact system 3, i.e. the surface facing away from the first sub-arc-extinguishing chamber 11; the second side wall 4b1 is the surface of the second arc-separating member 4b facing the contact system 3, i.e. the surface facing away from the second sub-arc-extinguishing chamber 12. The first side wall 4a1 is spaced apart from the second side wall 4b1 to form a second channel C, which communicates with 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 into the second arc extinguishing chamber 2 through the second channel C, so as to meet the requirement of the heavy current condition.

It should be noted that, in addition to being used to transfer the high-current arc to the second arc-extinguishing chamber 2, the second channel C may also be used to transport part of the gas flow to the second arc-extinguishing chamber 2 and out of the interior of the electrical switch through the second arc-extinguishing chamber 2. Specifically, an arc is generated from the first movable contact 311 and the first stationary contact 32 in the contact system 3, and a high-voltage environment is easily formed in the vicinity of the position due to the influence of the arc or the like, while the second arc extinguishing chamber 2 relatively forms a low-voltage environment. The gas flow is thus transferred into the second arc chute 2 through the second channel C under the influence of the pressure.

In some embodiments, as shown in fig. 1, 7 and 8, the second arc extinguishing chamber 2 includes a third sub-arc extinguishing chamber 21, the arc isolation assembly 4 includes a second portion 42 disposed on a side of the first portion 41 remote from the contact system 3 along the second direction Y, the second portion 42 includes a first through hole 421 formed therethrough along the first direction X, and the third sub-arc extinguishing chamber 21 is located within the first through hole 421.

The arc separation assembly 4 comprises a first portion 41 and a second portion 42, the second portion 42 is located along the second direction Y on a side of the first portion 41 close to the third sub-arc extinguishing chamber 21, and the second portion 42 overlaps the third sub-arc extinguishing chamber 21 in the second direction Y, so that in order to ensure the arrangement of the third sub-arc extinguishing chamber 21, the second portion 42 is provided with a first through hole 421, and the first through hole 421 is used for avoiding the third arc extinguishing chamber. Meanwhile, the third sub arc extinguishing chamber 21 can penetrate through the first through hole 421, and the size of the third sub arc extinguishing chamber 21 in the first direction X can be increased through the design, so that the arc extinguishing reliability of the third sub arc extinguishing chamber 21 is improved. Alternatively, the first portion 41 and the second portion 42 are of unitary construction.

In addition, the third sub-arc-extinguishing chamber 21 communicates with the first through-hole 421, and the first through-hole 421 communicates with the second channel C, through which the arc generated by the contact system 3 can directly enter into the third sub-arc-extinguishing chamber 21.

It should be noted that, in the embodiment of the present application, the second arc extinguishing chamber 2 may include a third sub arc extinguishing chamber 21 and other sub arc extinguishing chambers as shown in fig. 1; as shown in fig. 9, the second arc extinguishing chamber 2 may include only the third sub arc extinguishing chamber 21, which is not limited in the embodiment of the present application.

In some embodiments, as shown in fig. 1, 7 and 8, the second arc extinguishing chamber 2 further comprises a fourth sub-arc extinguishing chamber 22 located on a side of the third sub-arc extinguishing chamber 21 remote from the contact system 3 along the second direction Y, the arc separating assembly 4 comprises a third portion 43 located on a side of the second portion 42 remote from the first portion 41 along the second direction Y, and a second through hole 431 formed through the third portion 43 along the first direction X, and the fourth sub-arc extinguishing chamber 22 is located at least partially within the second through hole 431.

The second arc-extinguishing chamber 2 comprises a third sub-arc-extinguishing chamber 21 and a fourth sub-arc-extinguishing chamber 22, and the design can increase the number of grid sheets in the second arc-extinguishing chamber 2 and improve the arc-extinguishing effect of the second arc-extinguishing chamber 2. Meanwhile, the arc isolation assembly 4 further comprises a third part 43 corresponding to the fourth sub-arc extinguishing chamber 22, and a second through hole 431 positioned in the third part 43, wherein the second through hole 431 is used for avoiding the fourth sub-arc extinguishing chamber 22, and meanwhile, the size space of the fourth sub-arc extinguishing chamber 22 in the first direction X can be increased. 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 by the implementation of the present application.

Optionally, the arc extinguishing system further includes a third striking member 53, one end of the third striking member 53 is stacked with the third sub-arc extinguishing chamber 21, the other end is stacked with the fourth sub-arc extinguishing chamber 22, a connecting section in the middle is used for connecting two ends of the third striking member 53, and the third striking member 53 is used for realizing arc series connection between the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 22, which is suitable for use conditions of heavy current arc.

In some embodiments, as shown in fig. 7 and 8, the arc isolation assembly 4 further includes a first insulator 44 disposed between the first through hole 421 and the second through hole 431.

The first insulator 44 is disposed between the first through hole 421 and the second through hole 431 in the second direction Y, that is, the first insulator 44 is disposed between the third sub-arc chute 21 and the fourth sub-arc chute 22. The arrangement of the first insulating member 44 is used for insulating part of the space between the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22, preventing back 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 further avoiding that the arc cannot pass through part of the grid plates in the third sub-arc-extinguishing chamber 21, and affecting the arc-extinguishing effect of the second arc-extinguishing chamber 2.

Furthermore, when the third arc striking member 53 is present, the first insulating member 44 serves to insulate between the third sub-arc chute 21 and the connection section of the third arc striking member 53, avoiding that the arc is directly transferred from the third sub-arc chute 21 to the connection section of the third arc striking member 53. It should be noted that, in the embodiment of the present application, the insulation arrangement between the connection sections of the third sub-arc-extinguishing chamber 21 and the third striking member 53 is to avoid the arc from being directly transferred to the connection section of the third striking member 53, so that the arc in the third sub-arc-extinguishing chamber 21 can only be transferred to the fourth sub-arc-extinguishing chamber 22 along the extending direction of the third striking member 53 through one end of the third striking member 53, which is laminated with the third sub-arc-extinguishing chamber 21, thereby ensuring that the arc is transferred from the third sub-arc-extinguishing chamber 21 to the fourth sub-arc-extinguishing chamber 22 along a specific path.

In some embodiments, the height of the first through hole 421 in the third direction Z is smaller 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 two by two.

The third direction Z may be the lamination direction of the first gate 13 in the first arc extinguishing chamber 1, and may be the lamination direction of the gate in the third sub arc extinguishing chamber 21 and the fourth sub arc extinguishing chamber 22. Alternatively, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

The first through hole 421 is used for placing the third sub arc extinguishing chamber 21, and the second through hole 431 is used for placing 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. The height of the first through hole 421 in the third direction Z is set smaller than the height of the second through hole 431 in the third direction Z, so that the fourth sub-arc-extinguishing chamber 22 can obtain a larger arrangement space than the third sub-arc-extinguishing chamber 21, and the height and arc-extinguishing capability of the fourth sub-arc-extinguishing chamber 22 are improved.

In some embodiments, referring to fig. 7 and 10, the arc extinguishing system further includes a first arc striking member 51 disposed on one side of the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2 along the third direction Z, and the first arc striking member 51 includes a first subsection 511 stacked with the first arc extinguishing chamber 1 and a second subsection 512 stacked with the fourth sub-arc extinguishing chamber 22.

The first arc striking member 51 is located on the same side of the first arc extinguishing chamber 1 and the fourth sub-arc extinguishing chamber 22 in the third direction Z, and serves as an arc striking grid for the first arc extinguishing chamber 1 and the fourth sub-arc extinguishing chamber 22. Meanwhile, the first arc striking piece 51 can be electrically connected with the first static contact 32, and an electric arc on the first static contact 32 can be transferred to the first arc extinguishing chamber 1 or the fourth sub-arc extinguishing chamber 22 through the first arc striking piece 51, namely, the first arc extinguishing chamber 1 and the fourth sub-arc extinguishing chamber 22 can both play a role in extinguishing the electric arc on the first static contact 32, so that the arc extinguishing reliability is improved.

It should be noted that, the first arc extinguishing chamber 1 includes the first sub arc extinguishing chamber 11 and the second sub arc extinguishing chamber 12, and in order to satisfy the arc striking needs of the first sub arc extinguishing chamber 11 and the second sub arc extinguishing chamber 12 at the same time, the number of the first arc striking pieces 51 may be set to one or two. Specifically, the number of the first arc striking members 51 may be two, and the two first arc striking members 51 are arranged side by side in the first direction X and are respectively arranged corresponding to the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 in the first arc extinguishing chamber 1; or as shown in fig. 10, the first arc striking member 51 is only one, and the single first arc striking member 51 may cover the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 at the same time, that is, the single first arc striking member 51 becomes the arc striking grid of the first sub-arc extinguishing chamber 11, the second sub-arc extinguishing chamber 12 and the fourth sub-arc extinguishing chamber 22 at the same time.

In some embodiments, the arc extinguishing system further comprises a second insulating member 6, the second insulating member 6 comprising a first baffle 61 arranged in a third direction Z on the side of the third sub-arc chute 21 facing the first arc striking member 51, the first baffle 61 being arranged at a distance from the first arc striking member 51.

The second insulating member 6 is mainly used for realizing insulation of a part of positions between the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22, so that an electric arc on the third sub-arc-extinguishing chamber 21 can be transferred into the fourth sub-arc-extinguishing chamber 22 only by means of the third arc striking member 53, and the matching reliability of the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22 is improved.

In the embodiment of the present application, the side of the second insulating member 6 near the first arc striking member 51 is provided with the first baffle plate 61, and the first baffle plate 61 may be stacked with the gate sheet in the third sub arc extinguishing chamber 21. The first baffle 61 is arranged at a distance from the first striking member 51, so that the third sub-arc extinguishing chamber 21 can be isolated from the first striking member 51 in an insulating manner, and the arc on the first stationary contact 32 is prevented from being transferred to the third sub-arc extinguishing chamber 21 through the first striking member 51. Meanwhile, the space between the first baffle 61 and the first arc striking member 51 can be partially formed by the gate, and the gate in the first arc extinguishing chamber 1 or the fourth sub arc extinguishing chamber 22 can be extended between the first baffle 61 and the first arc striking member 51.

In some alternative embodiments, a portion of the first grid 13 in the first arc chute 1 extends from the first portion 41 of the arc chute assembly 4 between the first baffle 61 and the first striking member 51, i.e., into the second portion 42. In this case, at least one of the first arc chute 1 and the fourth sub arc chute 22 needs to be made of a non-magnetically conductive material, including but not limited to copper, ceramic, and the like. This design makes it possible to avoid the transfer of the arc in the first arc chute 1 to the fourth sub-arc chute 22.

As shown in fig. 10, the second insulating member 6 may further include a third baffle 63 disposed on a side of the third sub-arc-extinguishing chamber 21 facing away from the first striking member 51 along the third direction Z, where the first baffle 61 and the third baffle 63 are both stacked with the gate sheets in the third sub-arc-extinguishing chamber 21, and the third sub-arc-extinguishing chamber 21 is used for insulating the third sub-arc-extinguishing chamber 21 from the inner wall of the electrical switch, so as to prevent the electrical arc from moving to the inner wall through the third sub-arc-extinguishing chamber 21 and damaging the inner wall of the electrical switch.

In some embodiments, referring to fig. 10 and 11, the second insulating member 6 further includes a second baffle 62 disposed on a side of the fourth sub-arc-extinguishing chamber 22 facing away from the first arc striking member 51 along the third direction Z, a connecting plate 64 for connecting the first baffle 61 and the second baffle 62, and a first insulating plate 65 disposed on a side of the third sub-arc-extinguishing chamber 21 facing the fourth sub-arc-extinguishing chamber 22 along the second direction Y; 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.

The second baffle 62 is disposed on a side of the fourth sub-arc-extinguishing chamber 22 facing away from the first striking member 51, and the second baffle 62 can also play a role in insulating the fourth sub-arc-extinguishing chamber 22 from the inner wall of the electric switch, so as to prevent the electric arc from moving to the inner wall to be damaged through the fourth sub-arc-extinguishing chamber 22. The first baffle 61 and the second baffle 62 are connected by a connecting plate 64, and the connecting plate 64 has a tendency to tilt in a direction away from the first striking member 51 in the third direction Z in a direction approaching the second baffle 62 in the second direction Y.

The connecting section of the third striking piece 53 is located on the side of the connecting plate 64 facing away from the third arc extinguishing chamber, the connecting plate 64 can reduce the risk that the electric arc in the third sub-arc extinguishing chamber 21 is directly transferred to the connecting section of the third striking piece 53, meanwhile, the connecting plate 64 is also provided with a first insulating plate 65 on the side facing the third sub-arc extinguishing chamber 21, and the insulating effect between the third sub-arc extinguishing chamber 21 and the connecting section of the third striking piece 53 is further enhanced by the first insulating plate 65.

In addition, in the embodiment of the present application, the first insulation plate 65 is provided with a first exhaust hole 651, and the high temperature gas flow generated by the third sub-arc-extinguishing chamber 21 or flowing through the third sub-arc-extinguishing chamber 21 can exit the third sub-arc-extinguishing chamber 21 through the first exhaust hole 651. While the first insulating plate 65 is sandwiched with the connecting plate 64 to form a first channel B, the high temperature air stream leaving the third sub-arc-extinguishing chamber 21 moves into the first channel B, then moves to the side of the second barrier 62 facing away from the fourth sub-arc-extinguishing chamber 22 and finally exits the arc-extinguishing system.

Optionally, the first insulating plate 65 extends along the third direction Z, and the connection plate 64 is disposed obliquely with respect to the first insulating plate 65, i.e. the extending direction of the first insulating plate 65 is the same as the stacking direction of the gate sheets in the third sub-arc-extinguishing chamber 21, which is more advantageous for releasing the high temperature air flow in the third sub-arc-extinguishing chamber 21.

In some embodiments, the connection plate 64 and the side of the second baffle plate 62 facing away from the first arc striking member 51 protrude to form a guide structure 66, and the guide structure 66 is used to guide the airflow and simultaneously adjust the exhaust area of the third sub-arc extinguishing chamber 21.

In some embodiments, the arc extinguishing system further includes a second insulating plate 67 disposed on a side of the fourth sub-arc extinguishing chamber 22 facing away from the third sub-arc extinguishing chamber 21, the second insulating plate 67 being located on a side of the second barrier 62 facing the fourth sub-arc extinguishing chamber 22, the second insulating plate 67 having a second exhaust hole 671 penetrating in the second direction Y.

The second insulating plate 67 is located at the tail position of the second arc extinguishing chamber 2, and plays a role in insulation protection. Meanwhile, the second insulating plate 67 is provided with a second exhaust hole 671, and high-temperature air in the fourth sub-arc-extinguishing chamber 22 can leave the fourth sub-arc-extinguishing chamber 22 through the second exhaust hole 671 to be released. Alternatively, the second insulating plate 67 is shaped to extend in the third direction Z, and the orthographic projection of the fourth sub-arc-extinguishing chamber 22 on the second insulating plate 67 is located within the outer contour of the second insulating plate 67, so that the second insulating plate 67 can cover the entire fourth sub-arc-extinguishing chamber 22.

In some embodiments, referring to fig. 12, the arc extinguishing system further includes a second arc striking member 52 disposed on one side of the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2 along the third direction Z, the second arc striking member 52 including a third section 521 disposed in a stacked manner with the first arc extinguishing chamber 1, and a fourth section 522 disposed in a stacked manner with the third sub-arc extinguishing chamber 21.

The first arc striking member 51 and the second arc striking member 52 are respectively located at two sides of the first arc extinguishing chamber 1 in the third direction Z, one end of the second arc striking member 52 is located at the position farthest from the first stationary contact 32 to which the first moving contact 31 can deflect, and 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 striking member 52, and the same as the first arc striking member 51, the number of the second arc striking members 52 can be one or two, which is not repeated in the embodiment of the present application.

Referring to fig. 13 and 14, fig. 13 is a schematic view of arc formation in the case of small current, fig. 14 is a schematic view of arc formation in the case of large current, and the arrow direction is the moving path of the arc. In fig. 13, since the current inside the appliance switch is small, the generated arc can be directly transferred into the first arc extinguishing chamber 1 through the first moving contact 31. In fig. 14, since the internal current of the electric switch is large, most of the generated current is transferred to the second striking member 52 through the first moving contact 31 and then transferred to the third sub-arc-extinguishing chamber 21 through the second striking member 52, and at this time, the arc is only moved into the fourth sub-arc-extinguishing chamber 22 through the extending direction of the third striking member 53 due to the presence of the first insulating member 44 (not shown) and the second insulating member 6, thereby achieving an arc extinguishing effect.

In some embodiments, referring to fig. 7 and 15, the first portion 41 includes a first inner cavity 412, and the first arc chute 1 is at least partially located in the first inner cavity 412; the first notch 411 is connected to the first through hole 421 through the first inner cavity 412.

The first arc extinguishing chamber 1 may include a first sub arc extinguishing chamber 11 and a second sub arc extinguishing chamber 12, and likewise the first arc isolating member 4a and the second arc isolating member 4b may include two first inner chambers 412 corresponding to the first sub arc extinguishing chamber 11 and the second sub arc extinguishing chamber 12, respectively, and an opening of the first inner chamber 412 corresponding to the first sub arc extinguishing chamber 11 is disposed away from the second sub arc extinguishing chamber 12 along a first direction X, and an opening of the first inner chamber 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 slot is provided in the first inner cavity 412 for mounting a grid in the first sub-arc chute 11 or the second sub-arc chute 12.

The first notch 411 is connected with the first through hole 421 through the first inner cavity 412, the first through hole 421 is used for setting the third sub-arc-extinguishing chamber 21, and the communication between the first inner cavity 412 and the first through hole 421 can realize the communication between the first arc-extinguishing chamber 1 and the second arc-extinguishing chamber 2, so that part of high-temperature air flow in the first arc-extinguishing chamber 1 is transferred into the third sub-arc-extinguishing chamber 21 and is transferred away from the arc-extinguishing system through the first channel B.

In some embodiments, the first portion 41 further includes a side baffle 413 disposed on a side of the first inner cavity 412 away from the second arc extinguishing chamber 2 along the second direction Y, where the side baffle 413 is disposed to ensure that the high-temperature air flow entering the first arc extinguishing chamber 1 does not flow back into the contact system 3, thereby improving reliability of the contact system 3. While the gas accumulated at the side dams 413 can form a high pressure environment, thereby facilitating the movement of the gas flow into the second arc chute 2.

In some embodiments, the first arc extinguishing chamber 1 includes first gate sheets 13 stacked and first gaps 14 between adjacent first gate sheets 13, and the third sub arc extinguishing chamber 21 includes a plurality of third gate sheets 211 stacked and third gaps 212 between adjacent third gate sheets 211; wherein at least a portion of the first void 14 communicates with the third void 212.

The communication between the first gap 14 and the third gap 212 helps to transfer the high-temperature air flow in the first arc extinguishing chamber 1 to the third sub arc extinguishing chamber 21, so as to improve the gas conducting capability and avoid the accumulation of air flow in the first arc extinguishing chamber 1.

In some embodiments, as shown in fig. 7 and 15, the second portion 42 includes a second inner cavity 422 disposed at one side of the first through hole 421 along the third direction Z, and the second inner cavity 422 communicates with the first inner cavity 412 and the second through hole 431, respectively.

As can be seen from the foregoing, the second through hole 431 is used for providing the fourth sub-arc-extinguishing chamber 22, and the second inner cavity 422 is provided to enable communication between the first arc-extinguishing chamber 1 and the fourth sub-arc-extinguishing chamber 22, so that the high temperature air flow in the first arc-extinguishing chamber 1 can be transmitted into the fourth sub-arc-extinguishing chamber 22 and leave the arc-extinguishing chamber system through the fourth sub-arc-extinguishing chamber 22.

In some embodiments, the fourth sub-arc chute 22 includes a plurality of fourth gate sheets 221 stacked and disposed in a fourth gap 222 between adjacent fourth gate sheets 221; wherein at least a portion of the first grid 13 extends to the second interior cavity 422 and at least a portion of the first void 14 communicates with the fourth void 222.

The communication between the first gap 14 and the fourth gap 222 helps to transfer the high-temperature air flow in the first arc extinguishing chamber 1 to the third sub arc extinguishing chamber 21, so as to improve the gas conducting capability and avoid the accumulation of air flow in the first arc extinguishing chamber 1.

In the arc extinguishing system provided by the embodiment of the application, as shown in fig. 16, there are three situations in the transfer process of the high-temperature air flow in the arc extinguishing system. In the first case, the high-temperature gas flow can be transferred into the second arc extinguishing chamber 2 through the second channel C formed between the first arc-separating member 4a and the second arc-separating member 4b and then out of 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 gap 411, then be transferred into the third sub-arc-extinguishing chamber 21 through the first inner chamber 412, and leave the arc-extinguishing system through the first channel B. In the third case, the high temperature air flow may enter the first arc extinguishing chamber 1 through the first gap 411, then be transferred into the second inner chamber 422 through the first inner chamber 412, and be transferred into the fourth sub arc extinguishing chamber 22 through the second inner chamber 422, and finally leave the arc extinguishing system through the second exhaust hole 671 corresponding to the fourth sub arc extinguishing chamber 22.

In some embodiments, at least one of the first arc baffle 4a and the second arc baffle 4b comprises a gas generating material.

The gas generating material can generate gas under specific conditions, and in the process of arc extinction operation of the arc extinction system, the first arc isolation piece 4a or the second arc isolation piece 4b generate gas, so that the movement of the electric arc is assisted, and the air blowing effect on the electric arc is achieved. Specifically, the gas generated by the first arc-isolating member 4a and the second arc-isolating member 4b can form a certain high-pressure environment near the first arc-extinguishing chamber 1 in the second channel C, and under the combined action of magnetic blowing and strong air pressure, the trend arc can move to the second arc-extinguishing chamber 2 and finally be cut and extinguished by the grid sheet in the second arc-extinguishing chamber 2.

In some embodiments, referring to fig. 17, the first portion 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; the outer wall 414 includes a third vent hole 4141 penetrating in its thickness direction.

In the embodiment of the present application, the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2 are not mutually communicated any more, the plurality of outer walls 414 enclose to form an accommodating space for accommodating the first arc extinguishing chamber 1, and in order to ensure that the air flow in the first arc extinguishing chamber 1 can be released, the embodiment of the present application further provides a third air exhaust hole 4141 on the outer wall 414, and the air in the first arc extinguishing chamber 1 can be released through the third air exhaust hole 4141. Optionally, at least part of the third vent 4141 is disposed through the outer wall 414 in the first direction X.

In some embodiments, referring to fig. 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 311, and the second moving contact 33 includes a second moving contact 331; wherein the first movable contact 311 is located at a side of the second movable contact 331 near the second arc extinguishing chamber 2 along the second direction Y, and the first arc extinguishing chamber 1 is located at least at one side of the first movable contact 311 along the first direction X.

The contact system 3 includes two moving contacts, and the first moving contact 31 plays a role of protecting the second moving contact 33. Specifically, the electrical switch is turned on by means of the contact between the second movable contact 331 and the corresponding fixed contact on the second movable contact 33, when the electrical switch is internally failed or needs to be opened manually, the second movable contact 33 drives the first movable contact 31 to synchronously deflect, and the second movable contact 331 is separated from the corresponding fixed contact, but due to the existence of the first movable contact 31, no arc is formed at the second movable contact 331, the current in the electrical switch can continue to move from the second movable contact 331 to the first movable contact 311, and meanwhile, the first movable contact 311 is separated from the first fixed contact 32, and the arc is generated between the first movable contact 311 and the first fixed contact 32. Therefore, the first moving contact 31 can protect the second moving contact 33, and damage of the second moving contact 33 due to the existence of an arc can be reduced.

In some embodiments, as shown in fig. 1 and 18, the second movable contact 331 is located on a side of the first arc chute 1 facing away from the second arc chute 2 along the second direction Y.

In the embodiment of the application, the second movable contact 331 is located outside the first arc extinguishing chamber 1, that is, the first movable contact 311 is located in the arc extinguishing system, and the second movable contact 331 is located outside the arc extinguishing system, so that the design can avoid further reducing the risk of the second movable contact 331 participating in the arc extinguishing process, and plays a role in protecting the second movable contact 331.

In some embodiments, referring to fig. 19, the electrical switch further comprises a transfer device 7, the transfer device 7 being configured to generate a magnetic field, the magnetic field at least partially overlapping with the path of movement of the arc, so that at least part of the arc is transferred into the first arc-extinguishing chamber 1 under the effect of the magnetic field.

The magnetic field generated by the transfer device 7 can generate lorentz force to change the movement track of the arc, so that at least part of the arc can be transferred into the first arc extinguishing chamber 1 under the action of the magnetic field. The structure, arrangement, etc. of the transfer device 7 are not limited in this embodiment of the present application, as long as the magnetic field generated by the transfer device 7 can drive part of the arc to transfer into the first arc extinguishing chamber 1.

In some embodiments, the transfer device 7 comprises a permanent magnet 71, the permanent magnet 71 being arranged on at least one side of the contact system 3 in the third direction Z.

The permanent magnet 71 typically comprises two magnets of opposite polarity, and the magnetic field generated by the permanent magnet 71 is able to alter the path of movement of the arc, helping the transfer of the arc into the first arc chute 1. In the embodiment of the application, the permanent magnet 71 may be provided only one and on one side of the contact system 3, or may be provided two and simultaneously arranged on both sides of the contact system 3. The number of permanent magnets 71 is illustratively two and is arranged simultaneously on both sides of the contact system 3. In this case, the two permanent magnets 71 are respectively located on the side of the first stationary contact 32 away from the first movable contact 311, and on the side of the first movable contact 311 away from the first stationary contact 32, that is, the transfer device 7 is disposed at the periphery of the arc generation. This design enables the arc to be deflected in the direction of the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12 in the first arc-extinguishing chamber 1.

In some embodiments, referring to fig. 20, a permanent magnet 71 is arranged on the side of the first arc chute 1 facing away from the contact system 3 in the first direction X.

The first arc-extinguishing chamber 1 comprises a first sub-arc-extinguishing chamber 11 and a second sub-arc-extinguishing chamber 12, wherein the number of the permanent magnets 71 is two, one permanent magnet 71 is positioned at one side of the first sub-arc-extinguishing chamber 11, which is away from the second sub-arc-extinguishing chamber 12, the other permanent magnet 71 is positioned at one side of the second sub-arc-extinguishing chamber 12, which is away from the first sub-arc-extinguishing chamber 11, and the two permanent magnets 71 are symmetrically arranged. This design makes it possible to arrange the permanent magnets 71 directly on the first arc-separating member 4a and the second arc-separating member 4b, thereby reducing the difficulty in mounting the permanent magnets 71.

It should be noted that the single permanent magnet 71 includes two magnetic poles of N pole and S pole, the N pole may be located on a side of the S pole close to the second arc extinguishing chamber 2, or may be located on a side of the S pole away from the second arc extinguishing chamber 2, that is, the arrangement of two magnetic poles with opposite polarities in the single permanent magnet 71 is not limited in the embodiment of the present application.

Although the embodiments of the present application are disclosed above, the embodiments are only used for the convenience of understanding the present application, and are not intended to limit the present application. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the present disclosure as defined by the appended claims.

In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, substitution of other connection modes described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present application, and they should be included in the scope of the present application.

Claims

1. An arc extinguishing system for an electrical switch, the electrical switch including a contact system, the arc extinguishing system comprising:

a first arc chute disposed along a first direction on at least one side of the contact system;

the second arc extinguishing chamber is arranged on one side of the contact system along a second direction, and the first direction is intersected with the second direction;

the arc isolation assembly is arranged on at least one side of the contact system along the first direction and comprises a first part which is arranged corresponding to the first arc extinguishing chamber, and a first notch which is formed by the first part in a recessed way along the first direction, and at least part of electric arc generated by the contact system moves into the first arc extinguishing chamber through the first notch.

2. The arc suppression system of claim 1, wherein the second arc chute comprises a third sub-arc chute, the arc isolation assembly comprises a second portion disposed on a side of the first portion remote from the contact system along the second direction, the second portion comprises a first through hole formed therethrough along the first direction, and the third sub-arc chute is positioned within the first through hole.

3. The arc suppression system of claim 2, wherein the second arc chute further comprises a fourth sub-arc chute located on a side of the third sub-arc chute remote from the contact system along the second direction, the arc isolation assembly comprising a third portion disposed on a side of the second portion remote from the first portion along the second direction, and a second through hole formed through the third portion along the first direction, the fourth sub-arc chute being located at least partially within the second through hole.

4. The arc suppression system of claim 3, wherein the arc isolation assembly further comprises a first insulator disposed between the first and second through holes.

5. The arc extinguishing system according to claim 3, further comprising a first arc striking member disposed on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along a third direction, the first arc striking member including a first section disposed in a stacked manner with the first arc extinguishing chamber and a second section disposed in a stacked manner with the fourth sub-arc extinguishing chamber, the first direction, the second direction, and the third direction intersecting one another.

6. The arc extinguishing system according to claim 5, further comprising a second insulating member including a first baffle disposed in a third direction on a side of the third sub-arc chute facing the first arc striking member, the first baffle being disposed in spaced relation to the first arc striking member.

7. The arc extinguishing system according to claim 6, wherein the second insulating member further includes a second baffle plate disposed on a side of the fourth sub-arc extinguishing chamber facing away from the first arc striking member in the third direction, a connection plate for connecting the first baffle plate and the second baffle plate, and a first insulating plate disposed on a side of the third sub-arc extinguishing chamber facing the fourth sub-arc extinguishing chamber in the second direction;

the first insulating plate and the connecting plate are clamped to form a first channel, and the first insulating plate is provided with a first exhaust hole penetrating along the second direction.

8. The arc extinguishing system according to claim 7, further comprising a second insulating plate disposed on a side of the fourth sub-arc-extinguishing chamber facing away from the third sub-arc-extinguishing chamber, the second insulating plate being located on a side of the second baffle facing toward the fourth sub-arc-extinguishing chamber, the second insulating plate having a second vent hole therethrough along the second direction.

9. The arc extinguishing system according to claim 2, further comprising a second arc striking member disposed on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along a third direction, the second arc striking member including a third section disposed in a stacked manner with the first arc extinguishing chamber and a fourth section disposed in a stacked manner with the third sub-arc extinguishing chamber, the first direction, the second direction, and the third direction intersecting one another.

10. The arc suppression system of claim 2, wherein the first portion comprises a first interior cavity, the first arc chute being at least partially located in the first interior cavity;

the first notch is communicated with the first through hole through the first inner cavity.

11. The arc extinguishing system according to claim 10, wherein the first arc extinguishing chamber includes a plurality of first grid sheets arranged in a stacked manner and a first gap between adjacent first grid sheets, and the third sub arc extinguishing chamber includes a plurality of third grid sheets arranged in a stacked manner and a third gap between adjacent third grid sheets;

wherein at least a portion of the first void communicates with the third void.

12. The arc extinguishing system according to claim 3, wherein the first portion includes a first interior cavity, the first arc extinguishing chamber being at least partially located in the first interior cavity, the second portion includes a second interior cavity disposed on one side of the first through hole in a third direction, the second interior cavity being in communication with the first interior cavity and the second through hole, respectively.

13. The arc extinguishing system according to claim 12, wherein the first arc extinguishing chamber includes a plurality of first grid sheets arranged in a stacked manner and a first gap between adjacent first grid sheets, and the fourth sub arc extinguishing chamber includes a plurality of fourth grid sheets arranged in a stacked manner and a fourth gap between adjacent fourth grid sheets;

Wherein at least a portion of the first grid extends to the second cavity and at least a portion of the first void communicates with the fourth void.

14. The arc extinguishing system according to claim 1, wherein the first arc extinguishing chamber comprises a first sub arc extinguishing chamber and a second sub arc extinguishing chamber which are respectively arranged at two sides of the contact system along a first direction, and the arc isolating assembly comprises a first arc isolating piece arranged at one side of the first sub arc extinguishing chamber facing the contact system, and a second arc isolating piece arranged at one side of the second sub arc extinguishing chamber facing the contact system;

wherein, first arc separation piece includes towards contact system's first lateral wall, second arc separation piece includes towards contact system's second lateral wall, first lateral wall with the second lateral wall interval sets up and forms the second passageway, at least part the electric arc moves through the second passageway in the second arc extinguishing chamber.

15. The arc suppression system of claim 14, wherein at least one of the first arc baffle and the second arc baffle comprises a gas generating material.

16. The arc suppression system of claim 1, wherein the first portion comprises a plurality of outer walls surrounding the first arc suppression chamber on a peripheral side thereof, the plurality of outer walls having a first opening toward the contact system;

Wherein, the outer wall is last including the third exhaust hole that runs through along self thickness direction.

17. The arc suppression system of claim 1, wherein the first arc chute comprises a plurality of first grid segments disposed in a stack, the first grid segments comprising a first edge facing the contact system and a first arcing groove formed by the first edge being recessed inwardly.

18. An electrical switch comprising a contact system and an arc extinguishing system according to any one of claims 1 to 17.

19. The electrical switch of claim 18, wherein the contact system comprises a first moving contact and a second moving contact, the first moving contact comprising a first moving contact and the second moving contact comprising a second moving contact;

the first movable contact is located on one side, close to the second arc-extinguishing chamber, of the second movable contact along the second direction, and the first arc-extinguishing chamber is located on at least one side of the first movable contact along the first direction.

20. The electrical switch as recited in claim 19, wherein the first movable contact includes a body portion and an arc striking portion disposed on at least one side of the body portion along the first direction, an extension direction of the arc striking portion intersecting an extension direction of the body portion.

21. The electrical switch of claim 18, further comprising a transfer device configured to generate a magnetic field that at least partially overlaps a path of movement of the arc such that at least a portion of the arc is transferred to the first arc chute under the influence of the magnetic field.

22. The electrical switch of claim 21, wherein the transfer device comprises a permanent magnet disposed on a side of the first arc chute facing away from the contact system in the first direction or on at least one side of the contact system in a third direction, the first direction, the second direction, and the third direction intersecting one another.