CN216902719U - Circuit breaker - Google Patents

Abstract

The application provides a circuit breaker, which belongs to the technical field of low-voltage electrical appliances and comprises a circuit breaker shell, wherein an arc extinguish chamber is arranged in the circuit breaker shell, an air outlet is formed in the circuit breaker shell and used for discharging gas generated by the arc extinguish chamber, and the air outlet is positioned on the side surface and/or the bottom surface of the circuit breaker shell; the bottom in the circuit breaker shell is also provided with a first plug terminal and a second plug terminal which are opposite. The air outlet holes at different positions are matched with the positions of the arc extinguishing chambers, so that gas generated by arc extinguishing can be exhausted from the shell of the circuit breaker through various moving paths, and the exhaust effect of the circuit breaker is improved; simultaneously, cooperate in the venthole position of explosion chamber, be adapted to miniaturized circuit breaker's overall arrangement setting, make the circuit breaker of this application can be applied to miniaturized occasion needs.

Description

Circuit breaker

Technical Field

The application relates to the technical field of low-voltage apparatuses, in particular to a circuit breaker.

Background

At the moment of breaking of the circuit breaker, due to the existence of the capacitor between the moving contact and the fixed contact, the insulation between the moving contact and the fixed contact is broken down, and electric arcs are generated. After electric arc produced, be introduced the explosion chamber arc extinguishing to extinguish electric arc and do not burnt out by electric arc with the contact of guaranteeing the circuit breaker, can produce high-temperature gas during the arc extinguishing simultaneously, the arc extinguishing produces high-temperature gas and needs follow the interior discharge of circuit breaker. The whole volume of current circuit breaker is great, and the exhaust that its matched sets up the exhaust needs that can't satisfy miniature circuit breaker.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a circuit breaker, through the position setting of venthole to be adapted to miniature circuit breaker's needs.

The embodiment of the application is realized as follows:

one aspect of the embodiments of the present application provides a circuit breaker, which includes a circuit breaker housing, an arc extinguish chamber is disposed in the circuit breaker housing, an air outlet is disposed on the circuit breaker housing, and is used for discharging gas generated by the arc extinguish chamber, and the air outlet is located on a side surface and/or a bottom surface of the circuit breaker housing; the bottom in the circuit breaker shell is also provided with a first plug terminal and a second plug terminal which are opposite.

Optionally, the arc extinguish chamber is located between the first plug terminal and the second plug terminal, the first plug terminal is close to the arc extinguish chamber, and the second plug terminal is far away from the arc extinguish chamber;

the openings of the first plug-in terminal and the second plug-in terminal face the bottom in the breaker shell to be used for connecting an external power supply or a load, cavities are formed between the other three faces of the first plug-in terminal and the breaker shell, and the cavities are communicated with each other to form an inverted U-shaped exhaust channel.

Optionally, the air outlet is located on a side surface of the circuit breaker housing, which is close to a side surface of the first plug terminal away from the arc extinguish chamber;

the exhaust passage comprises a side cavity of the arc extinguish chamber, an upper cavity of the first plug terminal and a side cavity of the first plug terminal far away from the arc extinguish chamber, which are sequentially communicated, a gas outlet of the arc extinguish chamber faces towards the side cavity of the arc extinguish chamber, the first plug terminal is close to the side cavity of the arc extinguish chamber, and gas generated by the arc extinguish chamber moves along the exhaust passage through the gas outlet and is exhausted through the gas outlet.

Optionally, the air outlet is located on the bottom surface of the circuit breaker housing and on one side of the first plug terminal away from the arc extinguish chamber, and the arrangement direction of the air outlet is consistent with the opening direction of the first plug terminal;

the exhaust passage comprises a side cavity of the arc extinguish chamber, an upper cavity of the first plug terminal and a side cavity of the first plug terminal, which are sequentially communicated, wherein the first plug terminal is close to the arc extinguish chamber, the first plug terminal is far away from the side cavity of the arc extinguish chamber, a gas outlet of the arc extinguish chamber faces towards the position, where the first plug terminal is close to the side cavity of the arc extinguish chamber, and the arc extinguish chamber is exhausted by the gas generated passing through the gas outlet along the exhaust passage.

Optionally, an arc striking plate is further disposed at the bottom of the circuit breaker housing, one end of the arc striking plate extends to a position below the arc extinguishing chamber, and an exhaust passage is formed between the arc striking plate and the bottom of the circuit breaker housing;

the air outlet hole is positioned on the bottom surface of the circuit breaker shell and below the air exhaust channel, and the arrangement direction of the air outlet hole is consistent with the opening direction of the second plug terminal; and the gas outlet of the arc extinguish chamber is communicated with the gas exhaust passage, and gas generated by the arc extinguish chamber is exhausted from the gas outlet hole along the gas exhaust passage.

Optionally, one end of the arc striking plate, which is far away from the arc extinguishing chamber, extends to the second plug terminal, and a gas storage chamber is formed between the arc striking plate and the second plug terminal, and gas generated by the arc extinguishing chamber enters the gas storage chamber along the exhaust passage and is discharged through the gas outlet.

Optionally, a first socket hole and a second socket hole are formed in the bottom surface of the circuit breaker housing and are respectively communicated with the circuit breaker housing, the first socket hole corresponds to the first plug terminal, and the second socket hole corresponds to the second plug terminal;

the first socket hole and/or the second socket hole are/is used for assisting in giving vent to anger, so that the gas is discharged from the bottom surface of the circuit breaker shell.

Optionally, a plurality of gaps correspondingly communicated with the first socket hole and the second socket hole are formed in the side faces of the first socket terminal and the second socket terminal, and gas generated by the arc extinguish chamber is exhausted through the first socket hole and the second socket hole through the gaps.

Optionally, still be provided with in the circuit breaker casing and be located the thermal release of explosion chamber top, and be located the electromagnetic release of thermal release top, the electromagnetic release the bimetallic strip of thermal release with the explosion chamber all is on a parallel with the bottom of circuit breaker casing.

The beneficial effects of the embodiment of the application include:

according to the circuit breaker provided by the embodiment of the application, the arc extinguish chamber is arranged in the shell of the circuit breaker and is used for extinguishing electric arcs generated by the moving contact and the static contact; the bottom in the circuit breaker casing still is provided with relative first plug terminal and second plug terminal, and the opening of first plug terminal, second plug terminal all faces the bottom in the circuit breaker casing to be used for connecting external power source or load. The circuit breaker shell is provided with an air outlet hole which is communicated with the arc extinguishing chamber and used for discharging gas generated by arc extinguishing of the arc extinguishing chamber. The gas outlet holes can be positioned on the side surface of the breaker shell and also can be positioned on the bottom surface of the breaker shell, or the side surface and the bottom surface of the breaker shell are simultaneously provided with the gas outlet holes, and the gas outlet holes at different positions are matched with the positions of the arc extinguishing chamber, so that gas generated by arc extinguishing can be discharged from the breaker shell through various motion paths, and the exhaust effect of the breaker is improved; simultaneously, cooperate in the venthole position of explosion chamber, be adapted to miniaturized circuit breaker's overall arrangement setting, make the circuit breaker of this application can be applied to miniaturized occasion needs.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present disclosure;

fig. 2 is a second schematic structural diagram of a circuit breaker according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a circuit breaker housing according to an embodiment of the present application.

101-circuit breaker housing; 102-an exhaust channel; 103a, 103b, 103 c-air outlet holes; 104 a-a first mating terminal; 104 b-a second mating terminal; 1041-a slit; 105-an arc chute; 106-an exhaust passage; 107-arc striking plate of thermal release; 108-arc striking plate; 109-an air storage chamber; 110-a stationary contact; 111-moving contact; 112-a handle; 113-bimetallic strip; 114 a-first patch hole; 114 b-second patch hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The existing circuit breaker is large in overall size, and the exhaust setting of the existing circuit breaker is matched with the existing large-size circuit breaker. However, with the continuous development of the power industry, the circuit breakers are widely applied, and more strict requirements are put forward on the design and production of the circuit breakers, so that the circuit breakers tend to develop in the directions of intellectualization, miniaturization, long mechanical life and the like. Taking a miniature circuit breaker as an example, the exhaust arrangement of the existing circuit breaker is obviously not suitable for the requirement of the miniature circuit breaker.

In order to solve the above problems, an embodiment of the present application provides a circuit breaker, which can be applied to the needs of miniaturized scenarios such as a distribution box, and please refer to fig. 1, including a circuit breaker housing 101, an arc extinguishing chamber 105 is disposed in the circuit breaker housing 101, an air outlet is disposed on the circuit breaker housing 101, and is used for exhausting gas generated by the arc extinguishing chamber 105, and the air outlet is located on a side surface and/or a bottom surface of the circuit breaker housing 101; the bottom inside the circuit breaker housing 101 is also provided with opposing first and second jack terminals 104a, 104 b. The arc extinguishing chamber 105 is used for extinguishing the arc generated by the moving contact 111 and the fixed contact 110, and the arc extinguishing chamber 105 extinguishes the arc to generate gas, and the gas needs to be exhausted from the circuit breaker shell 101. Therefore, the breaker case 101 is provided with an outlet hole, and gas generated by arc extinguishing is discharged out of the breaker case 101 through the outlet hole.

The venthole sets up in the side of circuit breaker casing 101 in this application, perhaps sets up the venthole in the bottom surface of circuit breaker casing 101, perhaps sets up the venthole simultaneously with the bottom surface of circuit breaker casing 101 again.

The air outlet has multiple positions to be arranged, and when the air outlet is arranged at different positions, the flowing path of the gas generated by arc extinguishing is different. This application sets up the venthole in the side and/or the bottom surface of circuit breaker casing 101 to with the position cooperation of explosion chamber 105 and other devices, be adapted to miniaturized circuit breaker's setting and overall arrangement. And, arc extinguishing chamber 105 is located the bottom in circuit breaker casing 101 in this application, is close to the venthole position, and therefore the gas that the arc extinguishing produced moves the route of venthole short, and gas can discharge fast, reinforcing exhaust effect.

To sum up, in the circuit breaker provided in the embodiment of the present application, an arc extinguishing chamber 105 is disposed in the circuit breaker housing 101, and is configured to extinguish an arc generated by the moving contact 111 and the static contact 110; the bottom inside the circuit breaker housing 101 is further provided with a first plug terminal 104a and a second plug terminal 104b which are opposite to each other, and the openings of the first plug terminal 104a and the second plug terminal 104b face the bottom inside the circuit breaker housing 101 for connecting an external power source or a load. The circuit breaker shell 101 is provided with an air outlet hole, and the air outlet hole is communicated with the arc extinguishing chamber 105 and used for discharging gas generated by arc extinguishing of the arc extinguishing chamber 105. The air outlet holes can be positioned on the side surface of the circuit breaker shell 101 and also can be positioned on the bottom surface of the circuit breaker shell 101, or the side surface and the bottom surface of the circuit breaker shell 101 are simultaneously provided with the air outlet holes, and the air outlet holes at different positions are matched with the positions of the arc extinguishing chamber 105, so that gas generated by arc extinguishing can be exhausted from the circuit breaker shell 101 through various motion paths, and the exhaust effect of the circuit breaker is improved; simultaneously, cooperate in the venthole position of explosion chamber 105, be adapted to miniaturized circuit breaker's overall arrangement setting, make the circuit breaker of this application can be applied to miniaturized occasion needs.

Specifically, the arc extinguish chamber 105 is located between the first jack terminal 104a and the second jack terminal 104b, the first jack terminal 104a is close to the arc extinguish chamber 105, and the second jack terminal 104b is far away from the arc extinguish chamber 105;

the other three sides of the first socket terminal 104a and the circuit breaker case 101 form a cavity therebetween, and the three sides of the cavity communicate with each other to form an inverted U-shaped exhaust passage 102.

As shown in fig. 1, the first plug terminal 104a has three sides in fig. 1 in addition to an opening facing the bottom inside the circuit breaker housing 101, and a cavity is formed between the three sides and the circuit breaker housing 101 to form an inverted U-shaped exhaust channel 102 for exhausting the gas of the arc chute 105.

Specifically, the number of the air outlet holes is three, namely an air outlet hole 103a, an air outlet hole 103b and an air outlet hole 103 c; the air outlet 103a is located on a side surface of the circuit breaker housing 101, close to a side surface of the first plug terminal 104a far from the arc extinguish chamber 105;

the inverted U-shaped exhaust channel 102 includes a side cavity of the first plug terminal 104a close to the arc extinguish chamber 105, an upper cavity of the plug terminal, and a side cavity of the first plug terminal 104a far away from the arc extinguish chamber 105, which are sequentially communicated to form the inverted U-shaped exhaust channel 102, wherein the gas outlet of the arc extinguish chamber 105 faces the side cavity of the first plug terminal 104a close to the arc extinguish chamber 105, and gas generated by the arc extinguish chamber 105 moves along the exhaust channel 102 through the gas outlet and is exhausted through the gas outlet hole 103 a.

The arc chute 105, the first patch terminal 104a and the second patch terminal 104b are all located at the bottom inside the circuit breaker housing 101, and the arc chute 105 is close to the first patch terminal 104a and far away from the second patch terminal 104 b. In a first realizable manner of the present application, the air outlet hole 103a is located on a side of the circuit breaker housing 101 close to the first plug terminal 104a, as shown in fig. 1, the air outlet hole 103a is located on a side of the circuit breaker housing 101, and the first plug terminal 104a has two opposite sides, one side facing the air outlet hole 103a and the other side facing the arc extinguishing chamber 105. An inverted U-shaped exhaust channel 102 is formed between the first jack terminal 104a and the arc extinguishing chamber 105, above the first jack terminal 104a, and between the first jack terminal 104a and the gas outlet hole 103a, and gas generated by arc extinguishing by the arc extinguishing chamber 105 is exhausted from the gas outlet hole 103a through the exhaust channel 102.

It can be seen that when the gas outlet 103a is located on the side of the circuit breaker housing 101 and close to the arc-extinguishing chamber 105, the moving path of the arc-extinguishing chamber 105 along the inverted U-shaped exhaust channel 102 is short, and the gas can be rapidly exhausted, thereby enhancing the exhaust effect. In order to further increase the exhaust speed, a plurality of exhaust holes 103a are provided, and the plurality of exhaust holes 103a are provided side by side on the side surface of the circuit breaker case 101. Illustratively, as shown in fig. 3, the circuit breaker case 101 has a plurality of gas outlet holes 103a on a side surface thereof, and the plurality of gas outlet holes 103a increase a gas discharge space, so that gas can be discharged more rapidly.

In a second realisable version of the present application, a further outlet aperture 103b is provided in the bottom face. Specifically, the air outlet hole 103b is located on the bottom surface of the circuit breaker housing 101 and on a side of the first plug terminal 104a away from the arc extinguish chamber 105, and a setting direction of the air outlet hole 103b is consistent with an opening direction of the first plug terminal 104 a. The air outlet hole 103b is provided on the bottom surface of the circuit breaker case 101, and is close to the first jack terminal 104 a. The gas generated by the arc extinguishing chamber 105 can also be exhausted from the gas outlet hole 103b through the gas exhaust channel 102.

In addition, a first socket hole 114a and a second socket hole 114b are formed in the bottom surface of the circuit breaker housing 101 to be respectively communicated with the circuit breaker housing 101, the first socket hole 114a corresponds to the first plug terminal 104a, and the second socket hole 114b corresponds to the second plug terminal 104 b; the first and/or second outlet holes 114a, 114b may also be used to assist in venting gas to exit the circuit breaker housing 101 from the bottom surface.

The first plug terminal 104a is disposed in the circuit breaker housing 101 at a position corresponding to the first socket hole 114a, the second plug terminal 104b is disposed in the circuit breaker housing 101 at a position corresponding to the second socket hole 114b, and the gas in the arc extinguish chamber 105 can be exhausted from the first socket hole 114a or the second socket hole 114b, and can also be exhausted from the first socket hole 114a and the second socket hole 114 b. Through first socket row hole 114a, second socket row hole 114b as supplementary giving vent to anger, provide multiple optional motion route for the gas, gaseous exhaust mode increases, has greatly promoted exhaust speed and effect.

When the exhaust is performed through the first socket hole 114a, the gas generated from the arc extinguishing chamber 105 moves along the exhaust passage 102 and can be exhausted through the first socket hole 114 a. At this time, when the gas generated from the arc extinguishing chamber 105 moves to the gas outlet hole 103a on the side surface of the circuit breaker case 101 along the aforementioned inverted U-shaped gas discharge passage 102, a part of the gas is discharged from the gas outlet hole 103a on the side surface of the circuit breaker case 101, another part of the gas continues to move downward and is discharged from the gas outlet hole 103b, and another part of the gas can be discharged from the first socket hole 114 a.

Further, in a third achievable mode of the present application, a third air outlet hole 103c is also provided at the bottom surface. Specifically, an arc striking plate 108 is further arranged at the bottom of the circuit breaker shell 101, one end of the arc striking plate 108 extends to the lower side of the arc extinguishing chamber 105, an exhaust duct 106 is formed between the arc striking plate 108 and the bottom of the circuit breaker shell 101, an air outlet hole 103c is located on the bottom surface of the circuit breaker shell 101 and below the exhaust duct 106, and the arrangement direction of the air outlet hole 103c is consistent with the opening direction of the second plug terminal 104 b; the gas outlet of the arc extinguishing chamber 105 is communicated with a gas outlet 106, and gas generated by the arc extinguishing chamber 105 is exhausted from the gas outlet hole 103c along the gas outlet 106.

Illustratively, one side of the arc striking plate 108 is disposed horizontally and extends below the arc extinguishing chamber 105, and the other end of the arc striking plate 108 is disposed obliquely and extends toward the second socket terminal 104 b. A gap is formed between one end of the arc striking plate 108 below the arc extinguishing chamber 105 and the inner bottom surface of the circuit breaker housing 101, and the gap horizontally extends to the position of the second plug terminal 104b to form an exhaust passage 106. The exhaust passage 106 is communicated with the air outlet of the arc extinguishing chamber 105, and the gas extinguished by the arc extinguishing chamber 105 enters the gas storage chamber 109 through the exhaust passage 106 and can be exhausted from the air outlet hole 103 c.

It should be noted that, when the exhaust duct 106 is wide enough, the exhaust duct 106 may serve as a main exhaust channel of the circuit breaker, and the exhaust hole 103c is a main exhaust hole.

The gas storage chamber 109 is formed by extending the end of the arc striking plate 108 away from the arc extinguishing chamber 105 to the second plug terminal 104b, and the gas generated by the arc extinguishing chamber 105 enters the gas storage chamber 109 along the gas exhaust passage 106, in other words, the gas of the arc extinguishing chamber 105 is introduced into the gas storage chamber 109 through the gas exhaust passage 106. The gas flowing out of the arc extinguishing chamber 105 moves to the gas outlet hole 103c through the gas exhaust passage 106 below the arc extinguishing chamber 105 to be exhausted.

When the gas is exhausted from the first socket hole 114a and the second socket hole 114b, the side surfaces of the first socket terminal 104a and the second socket terminal 104b are respectively provided with a plurality of slits 1041 correspondingly communicated with the first socket hole 114a and the second socket hole 114b, and the gas generated by the arc extinguish chamber 105 is exhausted through the first socket hole 114a and the second socket hole 114b through the slits 1041.

For example, as shown in fig. 2, slits 1041 are provided on both sides of the first plug terminal 104a, and similarly, slits 1041 are also provided on both sides of the second plug terminal 104b, the slits 1041 are disposed along a height direction of the circuit breaker housing 101 and are communicated with the corresponding first and second socket holes 114a and 114b, so that when gas flows through the first plug terminal 104a or the second plug terminal 104b, the gas can flow from the corresponding slit 1041 to the first and second socket holes 114a and 114b, and then be discharged.

For example, when the gas moves to the side of the first plug terminal 104a close to the gas outlet hole 103a through the inverted U-shaped exhaust channel 102, the gas can flow from the slit 1041 of the side to the first plug hole 114a, and is exhausted from the circuit breaker housing 101; for another example, when the gas moves from the gas exhaust passage 106 below the arc extinguish chamber 105 to the second socket terminal 104b, the gas flows to the second socket hole 114b through the slit 1041 of the second socket terminal 104b on the side close to the gas exhaust passage 106, and is exhausted out of the circuit breaker housing 101. The gas flowing into the gas storage chamber 109 through the gas exhaust passage 106 is exhausted through the gas outlet hole 103 c; of course, the slot 1041 of the second socket hole 114b may also be discharged out of the circuit breaker housing 101 through the second socket hole 114 b.

In summary, the gas in the arc extinguish chamber 105 is exhausted from the gas outlet hole 103a, the gas outlet hole 103b and the first socket hole 114a through the inverted U-shaped exhaust channel 102, and can also be exhausted from the gas outlet hole 103c and the second socket hole 114b through the exhaust passage 106 below the arc extinguish chamber 105, specifically, see the exhaust path shown by the dotted line with the arrow in fig. 1; the electric arc generated by the moving contact 111 and the fixed contact 110 is positioned between the arc striking plate 108 and the arc striking plate 107 of the thermal release; it can be seen that the moving path of any kind of gas is isolated from the electric arc generated by the moving contact 111 and the fixed contact 110, so as to avoid the short circuit of the gas when the gas meets the electric arc, and simultaneously avoid the electric ions generated by the electric arc being carried out of the circuit breaker housing 101 by the gas or being adsorbed on the inner wall of the circuit breaker housing 101 along with the gas.

On the other hand, in the circuit breaker provided by the embodiment of the present application, the circuit breaker housing 101 is further provided with a thermal release located above the arc extinguish chamber 105, and an electromagnetic release located above the thermal release, and the electromagnetic release, the bimetallic strip 113 of the thermal release, and the arc extinguish chamber 105 are all parallel to the bottom of the circuit breaker housing 101.

When the bottom level of circuit breaker casing 101 was placed, electromagnetic trip, thermal trip and explosion chamber 105 level set up to with other device cooperations in the circuit breaker casing 101, make the holistic compact structure of circuit breaker, be adapted to miniaturized scene demand.

Besides, for example, as shown in fig. 1, the handle 112, the electromagnetic trip, the thermal trip and the arc extinguish chamber 105 are sequentially arranged from top to bottom, the operating mechanism is arranged on the right side in the circuit breaker housing 101, the handle 112 is connected with the operating mechanism, and the fixed contact 110 is arranged on the arc striking plate 108 to contact with or separate from the movable contact 111 to realize switching on or off.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (9)

1. The circuit breaker is characterized by comprising a circuit breaker shell (101), wherein an arc extinguish chamber (105) is arranged in the circuit breaker shell (101), an air outlet hole is formed in the circuit breaker shell (101) and used for discharging gas generated by the arc extinguish chamber (105), and the air outlet hole is positioned on the side surface and/or the bottom surface of the circuit breaker shell (101); the bottom in the circuit breaker shell (101) is also provided with a first plug terminal (104a) and a second plug terminal (104b) which are opposite.

2. The circuit breaker of claim 1, wherein the arc chute (105) is located between the first and second jack terminals (104a, 104b), and the first jack terminal (104a) is proximate to the arc chute (105) and the second jack terminal (104b) is distal from the arc chute (105);

the openings of the first plug terminal (104a) and the second plug terminal (104b) face the bottom in the circuit breaker shell (101) to be used for connecting an external power supply or a load, a cavity is formed between the other three faces of the first plug terminal (104a) and the circuit breaker shell (101), and the three faces of the cavity are communicated with each other to form an inverted U-shaped exhaust channel (102).

3. The circuit breaker according to claim 2, characterized in that an air outlet (103a) is located at a side of the circuit breaker housing (101) close to a side of the first plug terminal (104a) remote from the arc chute (105);

exhaust passage (102) including communicate in proper order first plug terminal (104a) are close to the side cavity of explosion chamber (105), the top cavity of first plug terminal (104a) with first plug terminal (104a) are kept away from the side cavity of explosion chamber (105), the gas outlet orientation of explosion chamber (105) first plug terminal (104a) are close to the side cavity of explosion chamber (105), the gaseous warp that explosion chamber (105) produced gas outlet is followed exhaust passage (102) motion, and by venthole (103a) are discharged.

4. The circuit breaker according to claim 2, wherein an air outlet hole (103b) is located on a bottom surface of the circuit breaker housing (101) and a side of the first plug terminal (104a) away from the arc extinguishing chamber (105), and an arrangement direction of the air outlet hole (103b) is consistent with an opening direction of the first plug terminal (104 a);

exhaust passage (102) including communicate in proper order first plug terminal (104a) are close to the side cavity of explosion chamber (105), the top cavity of first plug terminal (104a) with first plug terminal (104a) are kept away from the side cavity of explosion chamber (105), the gas outlet orientation of explosion chamber (105) first plug terminal (104a) are close to the side cavity of explosion chamber (105), explosion chamber (105) are followed by the gas warp of production gas outlet exhaust passage (102) motion, and by venthole (103b) discharge.

5. The circuit breaker according to claim 1, characterized in that the bottom of the circuit breaker housing (101) is further provided with an arc striking plate (108), one end of the arc striking plate (108) extends to below the arc extinguishing chamber (105), and an exhaust passage (106) is formed between the arc striking plate (108) and the bottom of the circuit breaker housing (101);

the air outlet hole (103c) is positioned on the bottom surface of the circuit breaker shell (101) and below the air exhaust channel (106), and the arrangement direction of the air outlet hole (103c) is consistent with the opening direction of the second plug terminal (104 b); and the gas outlet of the arc-extinguishing chamber (105) is communicated with the gas outlet (106), and gas generated by the arc-extinguishing chamber (105) is exhausted from the gas outlet hole (103c) along the gas outlet (106).

6. The circuit breaker according to claim 5, wherein an end of the arc striking plate (108) away from the arc extinguishing chamber (105) extends to the second plug terminal (104b) and forms a gas storage chamber (109) with the second plug terminal (104b), and gas generated by the arc extinguishing chamber (105) enters the gas storage chamber (109) along the gas exhaust passage (106) and is exhausted through the gas outlet hole (103 c).

7. The circuit breaker according to any one of claims 1 to 6, wherein a first socket hole (114a) and a second socket hole (114b) are provided on a bottom surface of the circuit breaker housing (101) to communicate with the interior of the circuit breaker housing (101), respectively, the first socket hole (114a) corresponds to the first socket terminal (104a), and the second socket hole (114b) corresponds to the second socket terminal (104 b);

the first socket hole (114a) and/or the second socket hole (114b) are used for assisting in exhausting gas so that the gas is exhausted from the bottom surface of the breaker housing (101).

8. The circuit breaker according to claim 7, wherein a plurality of slits (1041) corresponding to the first socket hole (114a) and the second socket hole (114b) are disposed on the side surfaces of the first socket terminal (104a) and the second socket terminal (104b), and gas generated by the arc extinguish chamber (105) is exhausted through the first socket hole (114a) and the second socket hole (114b) via the slits (1041).

9. The circuit breaker of claim 1, wherein a thermal trip unit is further disposed within the circuit breaker housing (101) above the arc chute (105), and an electromagnetic trip unit is disposed above the thermal trip unit, wherein the electromagnetic trip unit, the bimetallic strip (113) of the thermal trip unit, and the arc chute (105) are parallel to a bottom of the circuit breaker housing (101).

Images