Arc extinction structure and circuit breaker

Abstract

The invention relates to the technical field of low-voltage electric appliances, in particular to an arc extinction structure and a circuit breaker. The arc extinguishing structure is used in cooperation with an arc extinguishing system. The arc extinguishing structure comprises an arc extinguishing cavity and a first adsorption part which is arranged in the arc extinguishing cavity and is used for adsorbing charged particles; the arc extinguishing cavities are arranged along a first direction, and the contact assembly, the arc extinguishing chamber assembly and the external wiring terminal are arranged along a second direction; an air inlet is formed in the side wall, in the first direction, of the arc extinguishing cavity, an air outlet is formed in the side wall, in the first direction, of the arc extinguishing cavity, and the air inlet of the arc extinguishing cavity is used for being communicated with the air outlet of the arc extinguishing cavity. The airflow which is discharged from the arc extinguishing cavity and carries the charged particles enters the arc extinguishing cavity, and the charged particles are isolated in the arc extinguishing cavity and are cooled in the arc extinguishing cavity, so that the insulating property of the external wiring terminal is improved; and a small number of charged particles returning into the arc extinguishing cavity cannot contact the contact assembly, so that the safety performance and the breaking capacity of the arc extinguishing system are improved.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, and in particular to an arc extinguishing structure and a circuit breaker. Background Art

[0002] The contact assembly of the circuit breaker includes a moving contact and a stationary contact, which are respectively connected to the external incoming terminal and the external outgoing terminal. The moving contact can contact or separate from the stationary contact to realize the connection or disconnection of the current. The arc generated after the moving contact and the stationary contact are separated enters the arc extinguishing chamber and is cut by the arc extinguishing chamber assembly in the arc extinguishing chamber.

[0003] In the existing circuit breaker, an air outlet and an external terminal are provided at the end of the arc extinguishing chamber, and the airflow generated by arc extinguishing is discharged from the air outlet at the end of the arc extinguishing chamber after passing through the arc extinguishing chamber assembly; the discharged airflow carries hot metal particles, which are likely to destroy the insulation performance at the external terminal; in addition, a contact assembly is provided at the front end of the arc extinguishing chamber. If the airflow cannot be discharged from the air outlet at the end of the arc extinguishing chamber in time after passing through the arc extinguishing chamber assembly, the metal particles returning along the airway are likely to fall back onto the contact assembly, affecting the safety performance of the circuit breaker and reducing the breaking capacity of the circuit breaker. Summary of the invention

[0004] The first object of the present invention is to provide an arc extinguishing structure, which can isolate the charged particles discharged from the arc extinguishing chamber, achieve the technical effect of zero arc extinguishing, and improve the safety of the arc extinguishing system when in use.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An arc extinguishing structure is used in conjunction with an arc extinguishing system, wherein the arc extinguishing system comprises a contact assembly, an arc extinguishing chamber, and an arc extinguishing chamber assembly disposed in the arc extinguishing chamber, wherein the contact assembly is connected to an external terminal and is used to connect or disconnect current, and the arc extinguishing chamber assembly is used to extinguish an arc generated when the current is disconnected; the arc extinguishing structure comprises an arc extinguishing chamber;

[0007] The arc extinguishing chamber and the arc extinguishing chamber are arranged along a first direction, and the contact assembly, the arc extinguishing chamber assembly and the external terminal are arranged along a second direction; an air inlet is arranged on the side wall of the arc extinguishing chamber along the first direction, and an air outlet is arranged on the side wall of the arc extinguishing chamber along the first direction, and the air inlet of the arc extinguishing chamber is used to be connected to the air outlet of the arc extinguishing chamber.

[0008] Furthermore, one arc extinguishing system is respectively provided on two opposite sides of the arc extinguishing chamber along the first direction;

[0009] The arc extinguishing chamber is provided with two air inlets, namely a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively arranged on two opposite side walls of the arc extinguishing chamber along the first direction; the first air inlet is used to connect with the air outlet of the arc extinguishing chamber located on one side of the arc extinguishing chamber, and the second air inlet is used to connect with the air outlet of the arc extinguishing chamber located on the other side of the arc extinguishing chamber.

[0010] Furthermore, two arc-extinguishing chambers are arranged in the arc-extinguishing cavity, and the first air inlet and the second air inlet are respectively connected to the two arc-extinguishing chambers; an isolation plate is arranged between the two arc-extinguishing chambers.

[0011] Further, any one of the arc extinguishing chambers is provided with a plurality of first adsorption members; any one of the first adsorption members is a metal mesh plate or a porous metal plate, and the plurality of first adsorption members in any one of the arc extinguishing chambers are arranged in parallel and arranged along the second direction;

[0012] And / or, any one of the arc extinguishing chambers is provided with an air flow channel having a meandering extension structure.

[0013] Furthermore, it also includes a mounting base arranged in the arc extinguishing chamber, the mounting base includes the isolation plate, the bottom plate, the rear plate, the first side plate and the second side plate, wherein the rear plate is arranged on one side of the bottom plate along the second direction, the first side plate and the second side plate are respectively arranged on two opposite sides of the bottom plate along the first direction, and the isolation plate is arranged between the first side plate and the second side plate;

[0014] An arc extinguishing chamber is formed between the isolation plate, the bottom plate, the rear plate and the first side plate; another arc extinguishing chamber is formed between the isolation plate, the bottom plate, the rear plate and the second side plate.

[0015] Furthermore, a buffer chamber connected to the arc extinguishing chamber is also provided in the arc extinguishing chamber; the arc extinguishing chamber is used to be connected to the arc extinguishing chamber; the arc extinguishing chamber and the buffer chamber are arranged along the second direction, and a vent is provided on the side wall of the buffer chamber away from the arc extinguishing chamber.

[0016] Furthermore, an air inlet channel is also provided in the arc extinguishing chamber, and the air inlet channel corresponds to and is connected to the arc extinguishing chamber one by one; the inlet of the air inlet channel is used to be connected to the air outlet of the corresponding arc extinguishing chamber, and the outlet of the air inlet channel is connected to the air inlet of the corresponding arc extinguishing chamber.

[0017] Furthermore, a second adsorbent for adsorbing charged particles is provided at the outlet of the air inlet passage;

[0018] And / or, the inlet area of ​​the air intake passage is larger than the outlet area of ​​the air intake passage.

[0019] Furthermore, the number of the arc extinguishing chamber is one, and one arc extinguishing chamber is correspondingly connected to one arc extinguishing system;

[0020] Or, there are multiple arc-extinguishing chambers, and the multiple arc-extinguishing chambers are connected to the multiple arc-extinguishing systems one by one; one arc-extinguishing chamber and one arc-extinguishing system connected correspondingly form a group of single-stage circuit components, and the multiple groups of single-stage circuit components are arranged along the first direction;

[0021] Or, the number of the arc extinguishing chamber is at least one, and the number of the arc extinguishing systems is one more than the arc extinguishing chamber; at least one arc extinguishing chamber and at least two arc extinguishing systems are arranged along the first direction; one arc extinguishing chamber is arranged between any two adjacent arc extinguishing systems;

[0022] Or, the number of the arc extinguishing chambers is at least two, and the number of the arc extinguishing systems is one less than the arc extinguishing chambers; at least two arc extinguishing chambers and at least one arc extinguishing system are arranged along the first direction; and one arc extinguishing system is arranged between any two adjacent arc extinguishing chambers.

[0023] Furthermore, the arc extinguishing chamber is not provided with an air outlet;

[0024] Or, a gas outlet communicating with the outside is provided on one side wall of the arc extinguishing chamber along the second direction;

[0025] Or, a gas outlet communicating with the outside is provided on one side wall of the arc extinguishing chamber along the second direction, and a porous plate or a pressure valve is provided at the gas outlet of the arc extinguishing chamber;

[0026] Alternatively, a vent is provided on a side wall of the arc extinguishing chamber along the second direction, and a cooling component is provided at the vent of the arc extinguishing chamber.

[0027] Furthermore, a first adsorption member for adsorbing charged particles is provided in the arc extinguishing chamber;

[0028] And / or, an air flow channel with a meandering extension structure is provided in the arc extinguishing chamber.

[0029] Furthermore, it also includes a buffer chamber connected to the arc extinguishing chamber; the arc extinguishing chamber and the buffer chamber are arranged along the second direction, and a vent is provided on the side wall of the buffer chamber away from the arc extinguishing chamber.

[0030] Furthermore, it also includes an air inlet channel; the inlet of the air inlet channel is used to be connected to the air outlet of the corresponding arc extinguishing chamber, and the outlet of the air inlet channel is connected to the air inlet of the corresponding arc extinguishing chamber.

[0031] Furthermore, a second adsorbent for adsorbing charged particles is provided at the outlet of the air inlet passage;

[0032] And / or, the inlet area of ​​the air intake passage is larger than the outlet area of ​​the air intake passage.

[0033] The second object of the present invention is to provide a circuit breaker, characterized in that it includes the arc extinguishing structure described in any of the above embodiments.

[0034] Beneficial effects of the present invention:

[0035] The present invention provides an arc extinguishing structure and a circuit breaker. The arc extinguishing structure is used in conjunction with an arc extinguishing system. The arc extinguishing system comprises a contact assembly, an arc extinguishing cavity and an arc extinguishing chamber assembly arranged in the arc extinguishing cavity. The contact assembly is connected to an external wiring terminal and is used to connect or disconnect current. The arc extinguishing chamber assembly is used to extinguish the arc generated when the current is disconnected. The arc extinguishing structure comprises an arc extinguishing cavity. The arc extinguishing cavity and the arc extinguishing cavity are arranged along a first direction, and the contact assembly, the arc extinguishing chamber assembly and the external wiring terminal are arranged along a second direction. An air inlet is arranged on the side wall of the arc extinguishing cavity along the first direction, and an air outlet is arranged on the side wall of the arc extinguishing cavity along the first direction. The air inlet of the arc extinguishing cavity is used to be connected to the air outlet of the arc extinguishing cavity.

[0036] In the above structure, the arc generated when the contact assembly disconnects the current is cut by the arc extinguishing chamber assembly, and then passes through the air outlet and the air inlet of the arc extinguishing chamber in sequence with the air flow, and enters the arc extinguishing chamber. The charged particles are isolated in the arc extinguishing chamber 1 and cooled in the arc extinguishing chamber 1, which can effectively prevent the residual charged particles from being ejected from the external terminal, thereby improving the insulation performance at the external terminal. In addition, since the airway direction between the arc extinguishing chamber and the arc extinguishing chamber is different from the arrangement direction of the contact assembly and the arc extinguishing chamber assembly, when a very small number of charged particles return to the arc extinguishing chamber, they will not bend again and return to the contact assembly, thereby improving the safety performance and breaking capacity of the arc extinguishing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic diagram of the assembly structure of the arc extinguishing structure and the arc extinguishing chamber at an angle provided in the first embodiment of the present invention;

[0039] Figure 2 It is the structural schematic diagram of the arc extinguishing system;

[0040] Figure 3A schematic diagram of the assembly structure of the arc extinguishing structure and the arc extinguishing chamber at another angle provided in the first embodiment of the present invention;

[0041] Figure 4 A schematic diagram of the installation structure of a cooling component in an arc extinguishing structure provided in Embodiment 1 of the present invention;

[0042] Figure 5 A schematic diagram of the structure of a mounting seat in the arc extinguishing structure provided in Embodiment 1 of the present invention;

[0043] Figure 6 A schematic diagram of the assembly structure of the arc extinguishing chamber and the mounting seat in the arc extinguishing structure provided in the first embodiment of the present invention;

[0044] Figure 7 A schematic diagram of the assembly structure of a mounting seat, a first adsorption member, and a second adsorption member in the arc extinguishing structure provided in the first embodiment of the present invention;

[0045] Figure 8 A schematic diagram of the external structure of a circuit breaker provided in Embodiment 2 of the present invention;

[0046] Fig. 9 A schematic diagram of the internal structure of a circuit breaker provided in Embodiment 2 of the present invention;

[0047] Fig.10 A schematic diagram of the connection structure of a circuit breaker housing and a porous plate at an angle provided in the second embodiment of the present invention;

[0048] Fig.11 This is a schematic diagram of the connection structure of the circuit breaker housing and the porous plate from another angle provided in the second embodiment of the present invention.

[0049] icon:

[0050] 100-contact assembly; 200-arc extinguishing chamber; 300-arc extinguishing chamber assembly; 400-external terminal; 500-housing; 501-base; 502-cover; 503-partition;

[0051] 1-arc extinguishing chamber; 11-first air inlet; 12-second air inlet; 13-arc extinguishing chamber; 14-buffer chamber; 15-air inlet channel;

[0052] 2-first adsorption member;

[0053] 3-mounting seat; 31-isolation plate; 32-bottom plate; 33-rear plate; 34-first side plate; 35-second side plate;

[0054] 4- second adsorption member;

[0055] 5- Cooling component;

[0056] 6-Multiwell plate. DETAILED DESCRIPTION

[0057] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0059] It should be noted that in the description of the present invention, the terms "connection" and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through an intermediate medium; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Embodiment 1

[0061] When the moving contact and the stationary contact of the existing circuit breaker are separated, the airflow carrying residual charged particles is ejected from the side of the external terminal along the airway. The ejected charged particles are likely to destroy the insulation performance at the external terminal. In addition, the metal particles returning along the airway are likely to fall back onto the contact assembly, affecting the safety performance and breaking capacity of the circuit breaker.

[0062] Based on the above problems, the present application provides an arc extinguishing structure according to one embodiment. Figure 1 and Figure 2 The arc extinguishing structure is used in conjunction with an arc extinguishing system. The arc extinguishing system includes a contact assembly 100, an arc extinguishing chamber 200, and an arc extinguishing chamber assembly 300 disposed in the arc extinguishing chamber 200. The contact assembly 100 is connected to an external terminal 400 and is used to connect or disconnect current. The arc extinguishing chamber assembly 300 is used to extinguish an arc generated when the current is disconnected.

[0063] The arc extinguishing structure includes an arc extinguishing chamber 1; the arc extinguishing chamber 1 and the arc extinguishing chamber 200 are arranged along a first direction, and the contact assembly 100, the arc extinguishing chamber assembly 300 and the external terminal 400 are arranged along a second direction; the arc extinguishing chamber 1 is provided with an air inlet on the side wall along the first direction, and the arc extinguishing chamber 200 is provided with an air outlet on the side wall along the first direction, and the air inlet of the arc extinguishing chamber 1 is used to be connected to the air outlet of the arc extinguishing chamber 200.

[0064] Optionally, the adjacent arc-extinguishing chamber 200 and arc-extinguishing chamber 1 share a chamber wall, and the air inlet of the arc-extinguishing chamber 1 is the air outlet of the adjacent arc-extinguishing chamber 200 .

[0065] The first direction is perpendicular to the second direction, and the direction perpendicular to the first direction and the second direction is the third direction. In this embodiment, the width direction of the arc extinguishing chamber 200 is the first direction, the length direction of the arc extinguishing chamber 200 is the second direction, and the height direction of the arc extinguishing chamber 200 is the third direction.

[0066] In the above structure, the arc generated when the contact assembly 100 disconnects the current passes through the arc extinguishing chamber assembly 300, and then passes through the air outlet of the arc extinguishing chamber 200 and the air inlet of the arc extinguishing chamber 1 in sequence or simultaneously with the air flow, and enters the arc extinguishing chamber 1. The charged particles are isolated in the arc extinguishing chamber 1 and cooled in the arc extinguishing chamber 1, which can effectively prevent the residual charged particles from being ejected from the external terminal 400, thereby improving the insulation performance of the external terminal 400. Analyzing the above structure again, the airway direction between the arc extinguishing chamber 200 and the arc extinguishing chamber 1 (i.e., the first direction) is different from the arrangement direction of the contact assembly 100 and the arc extinguishing chamber assembly 300 (i.e., the second direction). Therefore, when a small number of charged particles return to the arc extinguishing chamber 200 along the airway, they will not bend again and return to the contact assembly 100, thereby improving the safety performance and breaking performance of the arc extinguishing system.

[0067] Optionally, the size of the internal space of the arc extinguishing chamber 1 is set to be able to accommodate the amount of gas generated by the corresponding connected arc extinguishing system when the current is disconnected.

[0068] In this embodiment, the arc extinguishing structure further includes a first adsorbent 2 disposed in the arc extinguishing chamber 1 and used to adsorb charged particles. The first adsorbent 2 in the arc extinguishing chamber 1 can adsorb charged particles in the gas, thereby improving the isolation effect of the arc extinguishing chamber 1 on the charged particles and achieving the technical effect of zero arcing.

[0069] In an optional embodiment, an airflow channel (not shown in the drawings) with a meandering extension structure is provided in the arc extinguishing chamber 1. The meandering airflow channel can force the gas entering the arc extinguishing chamber 1 to move in a meandering manner in the airflow channel, thereby increasing the length of the airflow, which is beneficial to the cooling of the gas; and after the charged particles enter the meandering airflow channel, it is difficult to eject from the airflow channel, so the meandering airflow channel can improve the isolation effect of the charged particles, further improve the insulation performance at the external terminal 400, and the safety performance and breaking performance of the arc extinguishing system.

[0070] In another optional embodiment, an airflow channel with a meandering extension structure and a first adsorbent 2 for adsorbing charged particles are provided in the arc extinguishing chamber 1. In this embodiment, the first adsorbent 2 is provided in the airflow channel; the number of the first adsorbents 2 can be multiple, and the multiple first adsorbents 2 are arranged in sequence along the extension direction of the airflow channel; in the process of the gas passing through the airflow channel, it is necessary to filter through the first adsorbent 2 layer by layer, so as to completely isolate the charged particles in the arc extinguishing chamber 1.

[0071] Reference Figure 2 The arc extinguishing chamber assembly 300 includes a grid sheet group and / or a gas generating member, wherein the grid sheet group includes a plurality of grid sheets arranged along a third direction; the arc extinguishing chamber assembly 300 is an existing structure and will not be described in detail herein. In this embodiment, the grid sheet group is arranged at the gas outlet of the arc extinguishing chamber 200 so that the arc after cutting is discharged from one side of the grid sheet group, and the residual charged particles returning to the arc extinguishing chamber 200 are also blocked.

[0072] In actual production, the number of arc extinguishing systems in a product is set to one or more according to product specifications and user needs; based on this, the number of arc extinguishing chambers 1 of the arc extinguishing structure in this application can also be flexibly set according to product specifications and user needs. The following are several implementation methods provided by this application:

[0073] In the first embodiment, the number of the arc extinguishing chamber 1 is one, and one arc extinguishing chamber 1 is connected to one arc extinguishing system; in this embodiment, the arc extinguishing chamber 200 has an air outlet, and the arc extinguishing chamber 1 has an air inlet. The air outlet of the arc extinguishing chamber 200 is connected to the air inlet of the arc extinguishing chamber 1, and a single-stage circuit conduction is achieved at the pole where the arc extinguishing chamber 200 is located.

[0074] In the second embodiment, the number of the arc extinguishing chambers 1 is multiple, and the multiple arc extinguishing chambers 1 are connected to the multiple arc extinguishing systems one by one; the correspondingly connected arc extinguishing chambers 1 and the arc extinguishing system form a group of single-stage circuit components, and the multiple groups of single-stage circuit components are arranged along the first direction; in this embodiment, the multi-stage circuit is connected at the pole where the arc extinguishing chamber 200 in the multiple groups of single-stage circuit components is located;

[0075] As an example, the number of arc extinguishing systems and arc extinguishing chambers 1 are both two, and the two arc extinguishing systems and the two arc extinguishing chambers 1 are arranged in a first direction; the two arc extinguishing chambers 1 are located in the middle and the two arc extinguishing systems are located on opposite sides of the two arc extinguishing chambers 1, or the two arc extinguishing systems are located in the middle and the two arc extinguishing chambers 1 are located on opposite sides of the two arc extinguishing systems, and the adjacent arc extinguishing systems and arc extinguishing chambers 1 form a group of single-stage circuit components; in each group of single-stage circuit components, the arc extinguishing chamber 200 has an outlet, the arc extinguishing chamber 1 has an inlet, and the outlet of the arc extinguishing chamber 200 is connected to the inlet of the arc extinguishing chamber 1. In the above example, two-stage circuit conduction is achieved at the pole where the two arc extinguishing chambers 200 are located.

[0076] In implementation mode 3, the number of the arc extinguishing chamber 1 is at least one, and the number of the arc extinguishing systems is one more than the arc extinguishing chamber 1; at least one arc extinguishing chamber 1 and at least two arc extinguishing systems are arranged along the first direction; one arc extinguishing chamber 1 is arranged between any two adjacent arc extinguishing systems. In this embodiment, any two adjacent arc extinguishing systems can share one arc extinguishing chamber 1;

[0077] As an example, there are two arc extinguishing systems and one arc extinguishing chamber 1. The arc extinguishing chamber 200 of each arc extinguishing system has one air outlet, and the arc extinguishing chamber 1 has two air inlets. The air outlets of the two arc extinguishing chambers 200 are respectively connected to the two air inlets of the arc extinguishing chamber 1, so that two-stage circuit conduction is achieved at the poles where the two arc extinguishing chambers 200 are located.

[0078] As another example, the number of arc extinguishing systems is three, the number of arc extinguishing chambers 1 is two, the arc extinguishing chamber 200 of the middle arc extinguishing system has two air outlets, the arc extinguishing chambers 200 of the arc extinguishing systems on both sides have one air outlet, each arc extinguishing chamber 1 has two air inlets, and the adjacent air inlets and air outlets are connected; the airflow in the middle arc extinguishing chamber 200 can be divided into two paths, and the two airflows respectively enter the two arc extinguishing chambers 1 on the opposite sides of the middle arc extinguishing chamber 200; in this example, three-level circuit conduction is achieved at the poles where the three arc extinguishing chambers 200 are located.

[0079] Embodiment 4: The number of the arc extinguishing chambers 1 is at least two, and the number of the arc extinguishing systems is one less than the number of the arc extinguishing chambers 1; at least two arc extinguishing chambers 1 and at least one arc extinguishing system are arranged along the first direction; an arc extinguishing system is arranged between any two adjacent arc extinguishing chambers 1. In this embodiment, the airflow in the arc extinguishing chamber 200 in each arc extinguishing system is divided into two paths, and the two airflows enter the two arc extinguishing chambers 1 on opposite sides of the arc extinguishing chamber 200 respectively. The structure of this embodiment is similar to the previous embodiment and will not be repeated here.

[0080] In the present application, the number of arc extinguishing chambers 1 and arc extinguishing systems as well as their relative positions can be further expanded on the basis of the above-mentioned multiple implementations, which are not listed one by one here.

[0081] In the present application, the arc extinguishing chamber 1 may or may not be provided with an air outlet. The following are several implementations of the air outlet of the arc extinguishing chamber 1 provided in the present application:

[0082] In embodiment I, the arc extinguishing chamber 1 is not provided with a gas outlet. After the gas carrying charged particles enters the arc extinguishing chamber 1, the charged particles are adsorbed by the first adsorbent 2 in the arc extinguishing chamber 1, and the gas is naturally cooled and diffused to room temperature. It should be noted that in this embodiment, the size of the internal space of the arc extinguishing chamber 1 is set to accommodate the amount of gas generated by the corresponding connected arc extinguishing system when the current is disconnected.

[0083] In implementation mode II, an air outlet connected to the outside is provided on one side wall of the arc extinguishing chamber 1 along the second direction. After the gas carrying charged particles enters the arc extinguishing chamber 1, the charged particles are adsorbed by the first adsorption component 2 in the arc extinguishing chamber 1, and the filtered gas is discharged from the air outlet of the arc extinguishing chamber 1 to achieve rapid cooling and pressure reduction. In this implementation mode, since the air outlet of the arc extinguishing chamber 1 and the external terminal 400 are arranged in parallel along the first direction, that is, the direction of the discharged air flow is not toward the external terminal 400, this arrangement can, on the one hand, prevent high-temperature gas from blowing toward the external terminal 400 and causing the insulation performance of the external terminal 400 to be reduced, and on the other hand, even if a very small number of charged particles fly out, it will not affect the insulation performance at the external terminal 400.

[0084] Embodiment III: a gas outlet connected to the outside is provided on one side wall of the arc extinguishing chamber 1 along the second direction, and a porous plate 6 or a pressure valve is provided at the gas outlet of the arc extinguishing chamber 1;

[0085] Reference Figure 3 , Figure 3 In the illustrated embodiment, a porous plate 6 is provided at the gas outlet of the arc extinguishing chamber 1. The porous plate 6 is a plate structure having a plurality of through holes, and the airflow is discharged from the plurality of through holes on the porous plate 6.

[0086] In an embodiment in which a pressure valve is provided at the air outlet, in the initial state, when the air pressure in the arc extinguishing chamber 1 is lower than the set value of the pressure valve, the pressure valve closes the outlet of the arc extinguishing chamber 1; when the air pressure in the arc extinguishing chamber 1 reaches the set value of the pressure valve, the gas in the arc extinguishing chamber 1 pushes the pressure valve to open and discharge outward until the air pressure in the chamber is lower than the set value of the pressure valve, and the air pressure in the arc extinguishing chamber 1 is balanced by the pressure valve; the pressure valve is an existing structure and will not be described in detail here.

[0087] Embodiment V, a vent is provided on one side wall of the arc extinguishing chamber 1 along the second direction, and a cooling component 5 is provided at the vent; the gas in the arc extinguishing chamber 1 can be quickly cooled by the cooling component 5; it should be noted that in this embodiment, the vent is not used for the discharge of gas, and the gas exchanges heat with the cooling component 5 through the vent; it should be noted that in this embodiment, the size of the internal space of the arc extinguishing chamber 1 is set to be able to accommodate the amount of gas generated by the corresponding connected arc extinguishing system when the current is disconnected;

[0088] For example, refer to Figure 3 and Figure 4 , the cooling component 5 is a TEC refrigerator, which includes a mounting shell, a semiconductor chip arranged on the mounting shell, and a small fan connected to the heat dissipation surface of the semiconductor chip. The TEC refrigerator is an existing structure and will not be described in detail here; the TEC refrigerator has the advantages of compact structure and small space occupation, and there is no need to set up additional installation space for the TEC refrigerator. The TEC refrigerator can be installed on the outside of the arc extinguishing chamber 1 by screws, and the cooling surface of the TEC refrigerator covers the vent of the arc extinguishing chamber 1. When the current is disconnected, the TEC refrigerator is turned on, and the gas entering the arc extinguishing chamber 1 exchanges heat with the TEC refrigerator at the vent of the arc extinguishing chamber 1, thereby achieving the purpose of rapid cooling. Under this embodiment, optionally, a porous plate 6 is provided at the vent of the arc extinguishing chamber 1, and the TEC refrigerator is provided on the outside of the porous plate 6. Optionally, the arc extinguishing chamber 1 is provided with a cooling component 5 and a gas outlet connected to the outside on its side wall (note that the function of the gas outlet here is to balance the air pressure, and its opening area is smaller than the gas vent of the arc extinguishing chamber 1), and a pressure valve is provided at the gas outlet of the arc extinguishing chamber 1.

[0089] Analyzing the above-mentioned embodiments, the arc extinguishing chamber 1 in the present application may not be provided with an air outlet connected to the outside, so as to achieve the effect of completely isolating the charged particles in the arc extinguishing chamber 1, and the gas in the chamber is cooled and depressurized by natural cooling and diffusion. The arc extinguishing chamber 1 in the present application may also be provided with an air outlet connected to the outside, and the temperature and pressure of the gas in the chamber are reduced by quickly discharging the gas. The airflow discharged from the arc extinguishing chamber 1 and the external terminal 400 are located at different positions in the first direction, which can protect the safety performance of the external terminal 400. In addition, a vent connected to the cooling component 5 can also be provided on the arc extinguishing chamber 1, and the gas exchanges heat with the cooling component 5 through the vent to achieve rapid cooling of the gas in the chamber.

[0090] Continue to refer to Figure 3 In this embodiment, an arc extinguishing system is provided on opposite sides of the arc extinguishing chamber 1 along the first direction;

[0091] The arc extinguishing chamber 1 is provided with two air inlets, namely a first air inlet 11 and a second air inlet 12, and the first air inlet 11 and the second air inlet 12 are respectively arranged on two opposite side walls of the arc extinguishing chamber 1 along a first direction; the first air inlet 11 is used to connect the air outlet of the arc extinguishing chamber 200 located on one side of the arc extinguishing chamber 1, and the second air inlet 12 is used to connect the air outlet of the arc extinguishing chamber 200 located on the other side of the arc extinguishing chamber 1.

[0092] In this embodiment, the first air inlet 11 is also the air outlet of the arc extinguishing chamber 200 located on one side of the arc extinguishing chamber 1 , and the second air inlet 12 is also the air outlet of the arc extinguishing chamber 200 located on the other side of the arc extinguishing chamber 1 .

[0093] Furthermore, two arc extinguishing chambers 13 are arranged in the arc extinguishing chamber 1, and the first air inlet 11 and the second air inlet 12 are respectively connected to the two arc extinguishing chambers 13; an isolation plate 31 is arranged between the two arc extinguishing chambers 13. In the above arrangement, the gas in the arc extinguishing chamber 200 located on one side of the arc extinguishing chamber 1 enters one of the arc extinguishing chambers 13 through the first air inlet 11, and the gas in the arc extinguishing chamber 200 located on the other side of the arc extinguishing chamber 1 enters the other arc extinguishing chamber 13 through the second air inlet 12. The two arc extinguishing chambers 13 are separated by the isolation plate 31 to prevent the arcs entering the arc extinguishing chamber 1 from short-circuiting and breaking down in the arc extinguishing chamber 1.

[0094] Optionally, the size of the internal space of any arc extinguishing chamber 13 is set to be able to accommodate the amount of gas generated by the corresponding connected arc extinguishing system when the current is disconnected.

[0095] In this embodiment, a plurality of first adsorption members 2 are arranged in any arc extinguishing chamber 13; any first adsorption member 2 is a metal mesh plate or a porous metal plate, and the plurality of first adsorption members 2 in any arc extinguishing chamber 13 are arranged in parallel and arranged along the second direction;

[0096] And / or, an air flow channel with a meandering extension structure is provided in any arc extinguishing chamber 13 .

[0097] In the above structure, the multiple first adsorbents 2 can filter the airflow in multiple layers to improve the adsorption effect on charged particles. The winding airflow channel can lengthen the airflow length, which is beneficial to the cooling of the gas, and can improve the isolation effect on charged particles.

[0098] In this embodiment, an arc extinguishing chamber 13 and a buffer chamber 14 connected to the arc extinguishing chamber 13 are also provided in the arc extinguishing chamber 1; the arc extinguishing chamber 13 is used to connect with the arc extinguishing chamber 200, and a first adsorption component 2 is provided in the arc extinguishing chamber 13; the arc extinguishing chamber 13 and the buffer chamber 14 are arranged along the second direction, and a vent is provided on the side wall of the buffer chamber 14 away from the arc extinguishing chamber 13.

[0099] In other embodiments, the buffer chamber 14 can also be configured as a structure independent of the arc extinguishing chamber 1; that is, the arc extinguishing structure is also provided with a buffer chamber 14 connected to the arc extinguishing chamber 1; the arc extinguishing chamber 1 and the buffer chamber 14 are arranged along the second direction, and a vent is provided on the side wall of the buffer chamber 1 away from the arc extinguishing chamber 1.

[0100] In this embodiment, two arc extinguishing chambers 13 are arranged in the arc extinguishing chamber 1, one arc extinguishing chamber 13 is connected to the arc extinguishing system on one side of the arc extinguishing chamber 1, and the other arc extinguishing chamber 13 is connected to the arc extinguishing system on the other side of the arc extinguishing chamber 1; the two arc extinguishing chambers 13 are arranged along the first direction, and the two arc extinguishing chambers 13 and the buffer chamber 14 are arranged along the second direction.

[0101] In the embodiment where the arc extinguishing system is disposed on only one side of the arc extinguishing chamber 1, only one arc extinguishing chamber 13 is disposed in the arc extinguishing chamber 1, and the arc extinguishing chamber 13 and the buffer chamber 14 are disposed in parallel along the second direction.

[0102] On the basis of the above structure, at least one first adsorption member 2 is arranged at the entrance of the buffer chamber 14 , and the arc extinguishing chamber 13 and the buffer chamber 14 are separated by the first adsorption member 2 .

[0103] Optionally, the vent of the buffer chamber 14 is connected to the outside and can be in a normally open state; the airflow enters the buffer chamber 14 after being filtered by the multi-layer first adsorbent 2, and then is discharged through the vent of the buffer chamber 14;

[0104] Alternatively, two air vents are provided on the side wall of the buffer chamber 14 away from the arc extinguishing chamber 13; a cooling component 5 is provided at one of the air vents, and the gas entering the buffer chamber 14 exchanges heat with the cooling component 5 for cooling; the other air vent is connected to the outside and a pressure valve is provided at its opening position, and when the air pressure in the buffer chamber 14 reaches a set value, the pressure valve opens to balance the air pressure in the cavity.

[0105] Continue to refer to Figure 3 The arc extinguishing chamber 1 is also provided with an air inlet channel 15, which is arranged one-to-one with the arc extinguishing chamber 13; the inlet of the air inlet channel 15 is used to be connected to the air outlet of the corresponding arc extinguishing chamber 200, and the outlet of the air inlet channel 15 is connected to the air inlet of the corresponding arc extinguishing chamber 13. In the above structure, the air flow passes through the air outlet of the arc extinguishing chamber 200 (that is, the air inlet of the arc extinguishing chamber 1), the inlet of the air inlet channel 15, the inside of the air inlet channel 15 and the outlet of the air inlet channel 15 (that is, the air inlet of the arc extinguishing chamber 13) in sequence, and enters the arc extinguishing chamber 13; the gas entering the arc extinguishing chamber 13 is filtered by the first adsorption member 2 in the room and enters the buffer chamber 14.

[0106] In other embodiments, the air inlet channel 15 can also be set to a structure independent of the arc extinguishing chamber 1; that is, the arc extinguishing structure also includes an air inlet channel 15; the inlet of the air inlet channel 15 is used to connect to the air outlet of the corresponding arc extinguishing chamber 200, and the outlet of the air inlet channel 15 is connected to the air inlet of the corresponding arc extinguishing chamber 1.

[0107] On the basis of the above structure, a second adsorbent 4 for adsorbing charged particles is provided at the outlet of the air inlet channel 15; the second adsorbent 4 may be a metal mesh plate or a porous metal plate, which is perpendicular to the airflow direction in the air inlet channel 15;

[0108] And / or, the inlet area of ​​the air intake passage 15 is greater than the outlet area of ​​the air intake passage 15 .

[0109] In the above setting, the second adsorption component 4 can perform preliminary filtration on the gas entering the arc extinguishing chamber 13, and the second adsorption component 4 can also block the charged particles from returning; the inlet area of ​​the air inlet channel 15 is larger than the outlet area of ​​the air inlet channel 15, which can increase the buffering capacity of the air inlet channel 15, facilitate the gas to fully contact with the second adsorption component 4, and enhance the adsorption effect on the charged particles.

[0110] Reference Figure 5 and Figure 6 The arc extinguishing structure provided in the present application further includes a mounting seat 3 disposed in the arc extinguishing chamber 1, the mounting seat 3 includes the above-mentioned isolation plate 31, the bottom plate 32, the rear plate 33, the first side plate 34 and the second side plate 35, wherein the rear plate 33 is disposed on one side of the bottom plate 32 along the second direction, the first side plate 34 and the second side plate 35 are respectively disposed on two opposite sides of the bottom plate 32 along the first direction, and the isolation plate 31 is disposed between the first side plate 34 and the second side plate 35;

[0111] An arc extinguishing chamber 13 is formed between the isolation plate 31 , the bottom plate 32 , the rear plate 33 and the first side plate 34 ; another arc extinguishing chamber 13 is formed between the isolation plate 31 , the bottom plate 32 , the rear plate 33 and the second side plate 35 .

[0112] Reference Figure 6 After the mounting seat 3 is installed in the arc extinguishing chamber 1, the bottom plate 32 abuts against a cavity wall of the arc extinguishing chamber 1 along the third direction, and the rear plate 33 abuts against a cavity wall of the arc extinguishing chamber 1 along the second direction; the cavity wall of the arc extinguishing chamber 1 away from the bottom plate 32 (not shown in the figure) abuts against the isolation plate 31. The cavity wall of the arc extinguishing chamber 1 away from the bottom plate 32 and the bottom plate 32 are jointly enclosed to form an arc extinguishing chamber 13; the cavity wall of the arc extinguishing chamber 1 away from the rear plate 33 and the mounting seat 3 are spaced apart and a buffer chamber 14 is formed between the two.

[0113] Reference Figure 7In this embodiment, the first adsorption component 2 is installed on the mounting seat 3; specifically, the first adsorption component 2 in one arc extinguishing chamber 13 is clamped between the first side plate 34 and the isolation plate 31, and the first adsorption component 2 in the other arc extinguishing chamber 13 is clamped between the second side plate 35 and the isolation plate 31; accordingly, the first side plate 34, the isolation plate 31 and the second side plate 35 are all provided with a card slot for inserting the first adsorption component 2.

[0114] In this embodiment, the air intake passage 15 is arranged on the mounting seat 3; specifically, two plates are arranged on the inner wall surface of the first side plate 34 to form the air intake passage 15, and the second adsorption component 4 is clamped between the two plates; similarly, two plates are also arranged on the inner wall surface of the second side plate 35 to form the air intake passage 15.

[0115] In other embodiments, the arc extinguishing structure may not be provided with a mounting seat 3, or the mounting seat 3 is integrally formed with the cavity wall of the arc extinguishing cavity 1, the isolation plate 31 can be directly connected to the inner cavity surface of the arc extinguishing cavity 1, and the first adsorption component 2 is clamped between the isolation plate 31 and the inner wall surface of the arc extinguishing cavity 1.

[0116] It should be noted that, in the embodiment where only one side of the arc extinguishing chamber 1 is connected to the arc extinguishing system, no isolation plate 31 is provided in the arc extinguishing chamber 1 (or on the mounting seat 3 ), so that there is only one arc extinguishing chamber 13 in the arc extinguishing chamber 1 .

[0117] It should be noted that the contact assembly 100 is connected to the external terminal 400, which can be as follows: Figure 2 Direct connection or indirect connection. For example, in a two-pole DC circuit breaker with adjacent static contacts connected in series, the external incoming terminal and the external outgoing terminal are directly connected to the moving contact and indirectly connected to the static contact.

[0118] Embodiment 2

[0119] Another aspect of the present application provides a circuit breaker, which includes the arc extinguishing structure as described in the first embodiment, and an arc extinguishing system.

[0120] A circuit breaker provided in an optional embodiment of the present application is described in detail below.

[0121] Reference Figure 8 and Fig. 9 The circuit breaker provided in the present application also includes a housing 500, wherein the housing 500 is divided into a plurality of arc extinguishing chambers 200 and a plurality of arc extinguishing chambers 1 by partitions, and the plurality of arc extinguishing chambers 200 and the plurality of arc extinguishing chambers 1 are arranged along a first direction.

[0122] The contact assembly 100 and the arc extinguishing chamber assembly 300 are arranged in each arc extinguishing cavity 200 along the second direction, and the external connection terminals 400 are arranged on two opposite sides of the exterior of each arc extinguishing cavity 200 along the second direction.

[0123] A mounting seat 3 is provided in each arc extinguishing chamber 1, and one or two arc extinguishing chambers 13 and an air inlet channel 15 connected to the arc extinguishing chambers one by one are formed on each mounting seat 3, and each arc extinguishing chamber 13 is correspondingly connected to an arc extinguishing chamber 200; a first adsorption component 2 is provided in each arc extinguishing chamber 13, and a second adsorption component 4 is provided at the air inlet of the arc extinguishing chamber 13; when two arc extinguishing chambers 13 are formed on the mounting seat 3, the two arc extinguishing chambers 13 are separated by an isolation plate 31.

[0124] A buffer chamber 14 is provided in each arc extinguishing chamber 1. The one or two arc extinguishing chambers 13 and the buffer chamber 14 are arranged in a row along the second direction. A vent is provided on the side of the buffer chamber 14 away from the arc extinguishing chamber 13. A porous plate 6 is provided at the vent of the buffer chamber 14. Fig.10 and Fig.11 In this embodiment, the porous plate 6 and the shell 500 are integrally formed.

[0125] Specific reference Figure 8 As an optional embodiment, the circuit breaker includes a housing 500 consisting of a base 501 and a cover 502; Fig. 9 At least one partition 503 is arranged in the base 501. After the base 501 and the cover 502 are buckled together, the base 501, the cover 502 and the partition 503 of the circuit breaker together form at least one arc extinguishing chamber 200 and at least one arc extinguishing chamber 1; one cavity wall of the arc extinguishing chamber 1 along the third direction is the bottom surface of the cavity surrounded by the base 501 and the cover 502, and the other cavity wall of the arc extinguishing chamber 1 along the third direction is the top surface of the cavity surrounded by the base 501 and the cover 502.

[0126] In the above structure, the gas carrying charged particles in the arc extinguishing chamber 200 passes through the air inlet channel 15 and the second adsorption component 4 in sequence along the first direction and enters the corresponding connected arc extinguishing chamber 13; the charged particles entering the arc extinguishing chamber 13 are adsorbed by the first adsorption component 2; the gas filtered by the first adsorption component 2 enters the buffer chamber 14.

[0127] As an optional embodiment, the vent of the buffer chamber 14 is connected to the outside and is in a normally open state, and the gas entering the buffer chamber 14 is discharged from the vent of the buffer chamber 14 .

[0128] As another optional embodiment, a cooling component 5 can be provided at the vent of the buffer chamber 14, and the gas entering the buffer chamber 14 exchanges heat with the cooling component 5. The cooling component 5 is detachably mounted on the outer wall of the housing 500, and can be flexibly used and installed; in this embodiment, the cooling component 5 is removed, and the vent of the buffer chamber 14 is connected to the outside and is in a normally open state, and the gas can be discharged from the vent.

[0129] As another optional embodiment, the vent of the buffer chamber 14 is in a normally closed state, or the vent is in a closed state when the gas pressure in the arc extinguishing chamber 1 is lower than the set pressure, and the gas in the arc extinguishing chamber 1 is naturally cooled.

[0130] For the embodiment in which the cooling component 5 is provided, when the cooling component 5 is not installed, the vent of the buffer chamber 14 serves as an outlet for exhausting air to the outside; when the cooling component 5 is installed, the vent of the buffer chamber 14 serves as a heat exchange port for exchanging heat with the cooling component 5.

[0131] It should be noted that each arc extinguishing chamber 13 is connected to one arc extinguishing chamber 200, but each arc extinguishing chamber 200 may be connected to one or two arc extinguishing chambers 13. Specifically, the arc extinguishing chamber 200 may be provided with only one gas outlet, that is, the arc extinguishing chamber 200 is connected to one arc extinguishing chamber 13; the arc extinguishing chamber 200 may also be provided with two gas outlets, that is, the two sides of the arc extinguishing chamber 200 are connected to one arc extinguishing chamber 13 respectively, and the gas in the arc extinguishing chamber 200 is divided into two paths and enters different arc extinguishing chambers 13.

[0132] Through the above structure, the circuit breaker provided by the present application can achieve the technical effect of zero arcing and improve the insulation performance at the external terminal 400; and a very small number of charged particles returning from the arc extinguishing chamber 1 to the arc extinguishing chamber 200 will not contact the contact assembly 100, thereby greatly improving the safety performance and breaking capacity of the circuit breaker.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An arc extinguishing structure for use in conjunction with an arc extinguishing system, the arc extinguishing system comprising a contact assembly (100), an arc extinguishing chamber (200), and an arc extinguishing chamber assembly (300) disposed in the arc extinguishing chamber (200), the contact assembly (100) being connected to an external terminal (400) and used to connect or disconnect current, and the arc extinguishing chamber assembly (300) being used to extinguish an arc generated when the current is disconnected; characterized in that: The arc extinguishing structure comprises an arc extinguishing chamber (1); The arc extinguishing chamber (1) and the arc extinguishing chamber (200) are arranged in a first direction, and the contact assembly (100), the arc extinguishing chamber assembly (300) and the external terminal (400) are arranged in a second direction; an air inlet is arranged on the side wall of the arc extinguishing chamber (1) along the first direction, and an air outlet is arranged on the side wall of the arc extinguishing chamber (200) along the first direction, and the air inlet of the arc extinguishing chamber (1) is used to be connected to the air outlet of the arc extinguishing chamber (200).

2. The arc extinguishing structure according to claim 1, characterized in that: The arc extinguishing chamber (1) is provided with an arc extinguishing system on two opposite sides along the first direction respectively; The arc extinguishing chamber (1) is provided with two air inlets, namely a first air inlet (11) and a second air inlet (12); the first air inlet (11) and the second air inlet (12) are respectively arranged on two opposite side walls of the arc extinguishing chamber (1) along the first direction; the first air inlet (11) is used to connect to the air outlet of the arc extinguishing chamber (200) located on one side of the arc extinguishing chamber (1), and the second air inlet (12) is used to connect to the air outlet of the arc extinguishing chamber (200) located on the other side of the arc extinguishing chamber (1).

3. The arc extinguishing structure according to claim 2, characterized in that: Two arc extinguishing chambers (13) are arranged in the arc extinguishing cavity (1); the first air inlet (11) and the second air inlet (12) are respectively connected to the two arc extinguishing chambers (13); and an isolation plate (31) is arranged between the two arc extinguishing chambers (13).

4. The arc extinguishing structure according to claim 3, characterized in that: A plurality of first adsorption members (2) are arranged in any one of the arc extinguishing chambers (13); any one of the first adsorption members (2) is a metal mesh plate or a porous metal plate, and the plurality of first adsorption members (2) in any one of the arc extinguishing chambers (13) are arranged in parallel and arranged along the second direction; And / or, any one of the arc extinguishing chambers (13) is provided with an air flow channel having a meandering extension structure.

5. The arc extinguishing structure according to claim 3, characterized in that: It also includes a mounting base (3) arranged in the arc extinguishing chamber (1), the mounting base (3) including the isolation plate (31), the bottom plate (32), the rear plate (33), the first side plate (34) and the second side plate (35), wherein the rear plate (33) is arranged on one side of the bottom plate (32) along the second direction, the first side plate (34) and the second side plate (35) are respectively arranged on two opposite sides of the bottom plate (32) along the first direction, and the isolation plate (31) is arranged between the first side plate (34) and the second side plate (35); An arc extinguishing chamber (13) is formed between the isolation plate (31), the bottom plate (32), the rear plate (33) and the first side plate (34); another arc extinguishing chamber (13) is formed between the isolation plate (31), the bottom plate (32), the rear plate (33) and the second side plate (35).

6. The arc extinguishing structure according to claim 3, characterized in that: The arc extinguishing chamber (1) is further provided with a buffer chamber (14) in communication with the arc extinguishing chamber (13); the arc extinguishing chamber (13) is used to be in communication with the arc extinguishing chamber (200); the arc extinguishing chamber (13) and the buffer chamber (14) are arranged along the second direction, and a vent is provided on a side wall of the buffer chamber (14) away from the arc extinguishing chamber (13).

7. The arc extinguishing structure according to claim 3, characterized in that: An air inlet channel (15) is also provided in the arc extinguishing chamber (1), and the air inlet channel (15) corresponds to and is connected to the arc extinguishing chamber (13) one by one; the inlet of the air inlet channel (15) is used to be connected to the air outlet of the corresponding arc extinguishing chamber (200), and the outlet of the air inlet channel (15) is connected to the air inlet of the corresponding arc extinguishing chamber (13).

8. The arc extinguishing structure according to claim 7, characterized in that: A second adsorbing member (4) for adsorbing charged particles is provided at the outlet of the air inlet channel (15); And / or, the inlet area of ​​the air intake channel (15) is greater than the outlet area of ​​the air intake channel (15).

9. The arc extinguishing structure according to claim 1, characterized in that: The number of the arc extinguishing chamber (1) is one, and one arc extinguishing chamber (1) is correspondingly connected to one arc extinguishing system; Or, the number of the arc extinguishing chambers (1) is multiple, and the multiple arc extinguishing chambers (1) are connected to the multiple arc extinguishing systems in a one-to-one correspondence; one arc extinguishing chamber (1) and one arc extinguishing system connected in a corresponding manner form a group of single-stage circuit components, and the multiple groups of single-stage circuit components are arranged in a first direction; Or, the number of the arc extinguishing chamber (1) is at least one, and the number of the arc extinguishing systems is one more than the number of the arc extinguishing chambers (1); at least one arc extinguishing chamber (1) and at least two arc extinguishing systems are arranged along the first direction; and one arc extinguishing chamber (1) is arranged between any two adjacent arc extinguishing systems; Alternatively, the number of the arc extinguishing chambers (1) is at least two, and the number of the arc extinguishing systems is one less than the number of the arc extinguishing chambers (1); at least two arc extinguishing chambers (1) and at least one arc extinguishing system are arranged along the first direction; and one arc extinguishing system is arranged between any two adjacent arc extinguishing chambers (1).

10. The arc extinguishing structure according to claim 1, characterized in that: The arc extinguishing chamber (1) is not provided with an air outlet; Alternatively, a gas outlet communicating with the outside is provided on a side wall of the arc extinguishing chamber (1) along the second direction; Alternatively, a gas outlet communicating with the outside is provided on a side wall of the arc extinguishing chamber (1) along the second direction, and a porous plate (6) or a pressure valve is provided at the gas outlet of the arc extinguishing chamber (1); Alternatively, a vent is provided on a side wall of the arc extinguishing chamber (1) along the second direction, and a cooling component (5) is provided at the vent of the arc extinguishing chamber (1).

11. The arc extinguishing structure according to claim 1, characterized in that: A first adsorbing member (2) for adsorbing charged particles is arranged in the arc extinguishing chamber (1); And / or, an air flow channel with a meandering extension structure is provided in the arc extinguishing chamber (1).

12. The arc extinguishing structure according to claim 1, characterized in that: It also comprises a buffer chamber (14) connected to the arc extinguishing chamber (1); the arc extinguishing chamber (1) and the buffer chamber (14) are arranged along the second direction, and a vent is provided on the side wall of the buffer chamber (14) away from the arc extinguishing chamber (1).

13. The arc extinguishing structure according to claim 1, characterized in that: It also includes an air inlet channel (15); the inlet of the air inlet channel (15) is used to be connected to the air outlet of the corresponding arc extinguishing chamber (200), and the outlet of the air inlet channel (15) is connected to the air inlet of the corresponding arc extinguishing chamber (1).

14. The arc extinguishing structure according to claim 13, characterized in that: A second adsorbing member (4) for adsorbing charged particles is provided at the outlet of the air inlet channel (15); And / or, the inlet area of ​​the air intake channel (15) is greater than the outlet area of ​​the air intake channel (15).

15. A circuit breaker, characterized in that: It comprises the arc extinguishing structure as described in any one of claims 1 to 14.

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