Circuit breaker with rapid arc extinguishing function

Abstract

The utility model provides a circuit breaker with a rapid arc extinguishing function, which comprises a shell, a conductive assembly and a breaking structure, and is characterized in that an inner shell is arranged at one side of the conductive assembly, the breaking structure comprises a controller, a breaking assembly and an arc extinguishing assembly, and the controller and the conductive assembly are arranged at an interval; the on-off assembly is slidably accommodated in the inner shell, an airflow channel is formed between the on-off assembly and the side wall of the inner shell, and the controller is electrically connected to the conductive assembly and the on-off assembly; thus, when the circuit is abnormal, the controller obtains the trigger signal in the circuit and then drives the on-off assembly to detonate, a large amount of gas is generated when the on-off assembly detonates, and part of the gas generated by the on-off assembly is used for driving the on-off assembly to move. And the other part of gas generated by the on-off assembly flows out along a gas flow channel formed between the on-off assembly and the side wall of the inner shell and is used for blowing the electric arc to the arc extinguishing assembly, so that rapid arc extinguishing is realized, the arc extinguishing is reliable, the effect is good, and the safety of the circuit breaker with the rapid arc extinguishing function is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of circuit protection, and in particular to a circuit breaker with a rapid arc extinguishing function. Background Art

[0002] A circuit breaker is an electrical appliance that uses a metal conductor as a fuse connected in series in an electrical circuit. When an overload or short-circuit current passes through the fuse, it heats up and melts, thereby disconnecting the circuit. The circuit breaker has a simple structure and is easy to use. It plays a role in safety protection in the power distribution system. Circuit breakers are widely used in power grid protection and electrical equipment protection (for example, circuit protection of electric vehicles). When a short circuit fault or overload occurs in electrical equipment, it can automatically cut off the circuit to avoid damage to the electrical equipment and prevent the accident from spreading.

[0003] Existing circuit breakers mainly achieve reliable circuit disconnection by setting a gas generator in the chamber to trigger the disconnection of the conductive copper busbar, and extinguishing the arc through the arc extinguishing element; however, since the energy absorbing element is usually spaced apart from the conductive copper busbar to be disconnected, the energy absorbing effect of the energy absorbing element is poor and the arc extinguishing time is long. Utility Model Content

[0004] The present disclosure provides a circuit breaker with a rapid arc extinguishing function to at least solve the above-mentioned problems in the prior art.

[0005] To achieve the above objectives, the present disclosure provides the following technical solutions: a circuit breaker with a rapid arc extinguishing function, the circuit breaker with a rapid arc extinguishing function comprising:

[0006] The housing comprises an outer shell and an inner shell, wherein the inner shell is disposed inside the outer shell;

[0007] A conductive component is provided through the outer shell along a first direction, and the inner shell is provided on one side of the conductive component in a second direction perpendicular to the first direction;

[0008] The breaking structure includes a controller, a breaking assembly and an arc extinguishing assembly, wherein the controller is housed in the outer shell and spaced apart from the conductive assembly along the second direction, the breaking assembly is slidably housed in the inner shell in the second direction and an air flow channel is formed between the inner shell and the side wall, the arc extinguishing assembly is arranged on the other side of the conductive assembly in the second direction and is arranged opposite to the breaking assembly, and the controller is electrically connected to the conductive assembly and the breaking assembly; wherein,

[0009] The controller is used to obtain the trigger signal generated by the conductive component to control the detonation of the breaking component. A portion of the gas generated when the breaking component is detonated is used to drive the breaking component to move in the second direction and cut off the conductive component. Another portion of the gas generated when the breaking component is detonated flows out along the air flow channel and is used to blow the arc generated when the conductive component is cut off toward the arc extinguishing component.

[0010] In one embodiment, a strip groove is provided on the inner wall of the inner shell, and the air flow channel is formed between the strip groove and the disconnect assembly; or

[0011] The disconnecting assembly is provided with a strip-shaped notch, and the air flow channel is formed between the strip-shaped notch and the inner wall of the inner shell.

[0012] In one embodiment, the conductive assembly includes a first conductive bar, a fuse, and a second conductive bar arranged in sequence along a first direction, the fuse is connected to one end of the first conductive bar and one end of the second conductive bar, and the other ends of the first conductive bar and the second conductive bar both pass through the housing;

[0013] The arc extinguishing assembly and the disconnecting assembly are disposed on opposite sides of the second conductive bar in the second direction. The fuse is electrically connected to the fuse and is used to obtain a trigger signal generated by the fuse to control the disconnecting assembly to disconnect the second conductive bar.

[0014] In one embodiment, the controller is further electrically connected to an external trigger device, and the controller is used to obtain an external trigger signal and control the disconnecting component to disconnect the second conductive bar.

[0015] In one embodiment, the disconnect assembly includes:

[0016] an actuator, disposed on one side of the second conductive row in the second direction and slidably received in the inner shell, with the airflow channel formed between the actuator and a side wall of the inner shell;

[0017] A gas generating device is provided on the side of the actuator facing away from the second conductive bar. A portion of the gas generated by the gas generating device is used to drive the actuator to move along the second direction and cut off the second conductive bar. Another portion of the gas generated by the gas generating device flows out along the air flow channel formed between the actuator and the inner shell, and is used to blow the arc generated when the second conductive bar is cut off toward the arc extinguishing assembly.

[0018] In one embodiment, there are two gas generating devices, both of which are used to drive the actuator to move along the second direction. Both of the gas generating devices are electrically connected to the controller, and one of the gas generating devices is also electrically connected to an external trigger device through the controller.

[0019] In one embodiment, the execution element includes:

[0020] a main body, slidably connected to the inner shell along the second direction and disposed on a side of the gas generating device facing the second conductive bar;

[0021] A blade is disposed between the main body and the second conductive row and connected to the main body.

[0022] In one embodiment, the controller includes:

[0023] A circuit board electrically connected to the circuit breaker with rapid arc extinguishing function and the two gas generating devices;

[0024] A rectifier bridge is electrically connected to the circuit board and one of the gas generating devices to unidirectionally conduct the circuit between the circuit board and one of the gas generating devices.

[0025] In one embodiment, the controller further includes an isolation transformer disposed on the circuit board, wherein the isolation transformer is electrically connected to the circuit board and one of the gas generating devices.

[0026] In one embodiment, an arc extinguishing chamber is further provided inside the housing. The arc extinguishing chamber is located on a side of the second conductive bar away from the breaking structure. The arc extinguishing assembly is accommodated in the arc extinguishing chamber and is used for arc extinguishing.

[0027] In the above-mentioned circuit breaker with a rapid arc extinguishing function, when the circuit is abnormal (short circuit or overload), the controller obtains the trigger signal in the circuit and drives the breaking component to detonate. When the breaking component detonates, a large amount of gas is generated. Part of the gas generated by the breaking component is used to drive the breaking component to move in the second direction, and the other part of the gas generated by the breaking component flows out along the air flow channel formed between the breaking component and the side wall of the inner shell, and is used to blow the arc generated when the conductive component is cut off toward the arc extinguishing component to achieve rapid arc extinguishing, and the arc extinguishing is reliable and effective, thereby improving the safety of the circuit breaker with a rapid arc extinguishing function.

[0028] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings, in which several embodiments of the present disclosure are shown by way of example and not limitation, wherein:

[0030] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0031] Figure 1 A schematic structural diagram of a circuit breaker with a rapid arc extinguishing function according to an embodiment of the present disclosure is shown;

[0032] Figure 2 Shown Figure 1 A cross-sectional view of a circuit breaker with a rapid arc extinguishing function along the II-II direction;

[0033] Figure 3 Shown Figure 1 Schematic diagram of the structure of the upper and middle shell, inner shell and air flow channel;

[0034] Figure 4 Shown Figure 1 Schematic diagram of the structure of the conductive components, controller and disconnect components;

[0035] Figure 5 Shown Figure 1 Schematic diagram of the structure of the middle and lower shell, arc extinguishing chamber, positioning body and arc extinguishing assembly;

[0036] Figure 6 Shown Figure 3 Schematic diagram of the structure of the executive component.

[0037] Description of the numbers in the figure:

[0038] In the figure: 11, shell; 111, outer shell; 1111, upper shell; 1112, lower shell; 112, inner shell; 113, arc extinguishing chamber; 1131, first arc extinguishing chamber; 1132, second arc extinguishing chamber; 114, positioning body; 115, air flow channel; 12, conductive component; 121, first conductive row; 122, fuse; 123, second conductive row; 124, positioning hole; 13, breaking structure; 131, controller; 1311, circuit board; 1312, conductor; 132, breaking component; 1321, actuator; 1321a, main body; 1321b, blade; 1322, gas generating device; 14, arc extinguishing component; 141, first arc extinguishing component; 142, second arc extinguishing component. DETAILED DESCRIPTION

[0039] In order to enable the purposes, features and advantages of the present disclosure to be more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0040] It should be understood that the steps shown above can be reordered, added or deleted using various forms of flow. For example, the steps described in the present disclosure can be executed in parallel, sequentially or in different order, as long as the desired results of the technical solutions of the present disclosure can be achieved, which is not limited herein.

[0041] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one feature. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0042] The embodiments of the present utility model are described below with reference to the drawings.

[0043] For the sake of illustration, Figure 1 and Figure 4 a three-dimensional rectangular coordinate system is added in the first direction, that is, the setting direction of the first conductive row 121, the fuse body 122 and the second conductive row 123, the second direction is the direction of the movement of the execution member 1321 when cutting off the second conductive row 123, and the third direction is the setting direction of the two groups of positioning bodies 114.

[0044] Please refer to Figure 1 and Figure 2 together, the present disclosure provides a circuit breaker with a fast arc extinguishing function, the circuit breaker with a fast arc extinguishing function includes a shell 11, a conductive assembly 12 and an opening structure 13, the shell 11 is made of insulating material, the shell 11 includes an outer shell 111 and an inner shell 112, the inner shell 112 is arranged inside the outer shell 111, the conductive assembly 12 is arranged in the outer shell 111 along the first direction, the inner shell 112 is arranged on one side of the conductive assembly 12 in the second direction perpendicular to the first direction, the opening structure 13 includes a controller 131, an opening assembly 132 and an arc extinguishing assembly 14, the controller 131 is accommodated in the outer shell 111 and is arranged along the second direction and is spaced from the conductive assembly 12, please refer to Figure 3The disconnecting component 132 is slidably received in the inner shell 112 in the second direction and an air flow channel 115 is formed between the inner shell 112 and the side wall of the inner shell 112. The arc extinguishing component 14 is arranged on the other side of the conductive component 12 in the second direction and is arranged opposite to the disconnecting component 132. The controller 131 is electrically connected to the conductive component 12 and the disconnecting component 132. The controller 131 is used to obtain the trigger signal generated by the conductive component 12 to control the detonation of the disconnecting component 132. A part of the gas generated when the disconnecting component 132 is detonated is used to drive the disconnecting component 132 to move along the second direction and cut off the conductive component 12. Another part of the gas generated when the disconnecting component 132 is detonated flows out along the air flow channel 115 and is used to blow the arc generated when the conductive component 12 is cut off to the arc extinguishing component 14.

[0045] In the above-mentioned circuit breaker with a rapid arc extinguishing function, when the circuit is abnormal (short circuit or overload), the controller 131 obtains the trigger signal in the circuit and drives the breaking component 132 to detonate. When the breaking component 132 detonates, a large amount of gas is generated. Part of the gas generated by the breaking component 132 is used to drive the breaking component 132 to move in the second direction, and another part of the gas generated by the breaking component 132 flows out along the air flow channel 115 formed between the breaking component 132 and the side wall of the inner shell 112, and is used to blow the arc generated when the conductive component 12 is cut off to the arc extinguishing component 14, so as to achieve rapid arc extinguishing, and the arc extinguishing is reliable and effective, thereby improving the safety of the circuit breaker with a rapid arc extinguishing function.

[0046] In some embodiments, a strip groove is provided on the inner wall of the inner shell, and the air flow channel is formed between the strip groove and the disconnect assembly; or a strip notch is provided on the disconnect assembly, and the air flow channel is formed between the strip notch and the inner wall of the inner shell.

[0047] See also Figure 2 In this embodiment, the conductive assembly 12 includes a first conductive bar 121, a fuse 122, and a second conductive bar 123 arranged in sequence along a first direction. The fuse 122 is connected to one end of the first conductive bar 121 and one end of the second conductive bar 123. The other ends of the first conductive bar 121 and the second conductive bar 123 both extend through the housing 111. The arc extinguishing assembly 14 and the disconnecting assembly 132 are disposed on opposite sides of the second conductive bar 123 in the second direction. The fuse 122 is electrically connected to the fuse 122 and is used to obtain a trigger signal generated by the fuse 122 to control the disconnecting assembly 132 to disconnect the second conductive bar 123.

[0048] Thus, when the circuit is abnormal (short circuit or overload), the current passing through the first conductive row 121, the fuse 122 and the second conductive row 123 ablates the fuse 122, and the electric signal (voltage signal or current signal) on the ablated fuse 122 changes, a trigger signal is formed and transmitted to the controller 131, the controller 131 controls the opening assembly 132 to cut off the conductive assembly 12 after receiving the trigger signal, the controller 131 realizes the cut-off of the conductive assembly 12 by acquiring the trigger signal on the conductive assembly 12, passive circuit protection is formed, the response speed is fast, and the safety is high.

[0049] Further, the second conductive row 123 is provided with a thinning portion, and the opening assembly 132 cuts off the thinning portion of the second conductive row 123, so as to quickly cut off the second conductive row 123.

[0050] The material of the first conductive row 121 and the second conductive row 123 is not limited in the application, and for example, the material of the first conductive row 121 and the second conductive row 123 can be copper, aluminum, silver or alloy material with good conductive performance.

[0051] The material of the fuse 122 is not limited in the application, as long as the fuse can be melted when the current in the circuit exceeds the threshold value, and after the fuse 122 is melted, the change of the current passing through the fuse 122 and the voltage difference generated on the fuse can be used as a trigger signal transmitted to the detection circuit of the controller 131, for example, the fuse 122 can be made of the same material as the first conductive row 121 or the second conductive row 123, or made of tin or tin alloy.

[0052] Further, the fuse 122 is provided with a narrow neck (not shown in the figure), and the position and shape of the narrow neck are set according to the current passing condition and the melting characteristics.

[0053] Further, the fuse 122 is fixed to one end of the first conductive row 121 and one end of the second conductive row 123 by welding.

[0054] In the embodiment, the trigger signal is an external trigger signal, the controller 131 is also electrically connected to an external trigger device, and the controller 131 is used to acquire the external trigger signal and control the opening assembly 132 to cut off the second conductive row 123; thus, when the external trigger signal acquired by the controller 131 is abnormal, the opening assembly 132 is controlled to cut off the second conductive row 123, the circuit breaker with the rapid arc extinguishing function is combined with the passive protection formed by the internal trigger protection and the active protection formed by the external trigger protection, so as to form a main and passive protection integrated circuit breaker with the rapid arc extinguishing function, so as to further improve the reliable cut-off of the internal circuit of the circuit breaker with the rapid arc extinguishing function, and thus the safety of the circuit breaker with the rapid arc extinguishing function is further improved.

[0055] Exemplarily, the external trigger device can be a main control cabinet, and is used to actively obtain abnormal current signals or abnormal voltage signals of the circuit, and the installation process of the external trigger device and the controller 131 is conventional technology in this field.

[0056] See also Figure 1 In some embodiments, the housing 111 includes an upper shell 1111 and a lower shell 1112. The upper shell 1111 is detachably connected to the lower shell 1112 to facilitate disassembly or installation between the upper shell 1111 and the lower shell 1112, which is conducive to quickly assembling the conductive component 12 and the disconnect structure 13 into the shell 11. The conductive component 12 is clamped between the upper shell 1111 and the lower shell 1112 and positioned on the lower shell 1112. In this way, the conductive component 12 is first positioned on the lower shell 1112, and then the conductive component 12 is clamped and fixed by the upper shell 1111 and the lower shell 1112 to achieve assembly of the conductive component 12.

[0057] Please also refer to Figure 4 and Figure 5 Furthermore, two groups of positioning bodies 114 are protruding from the side of the lower shell 1112 facing the conductive component 12, and two groups of positioning holes 124 are provided on the conductive component 12. Each group of positioning holes 124 is adapted to a corresponding group of positioning bodies 114 and is used to position the conductive component 12. The two groups of positioning bodies 114 are arranged at intervals along the third direction.

[0058] Furthermore, the number of each group of positioning bodies 114 and each group of positioning holes 124 is the same and multiple, each positioning body 114 is adapted to a corresponding positioning hole 124 and is used to position the conductive component 12, and multiple positioning holes 124 are provided on the first conductive row 121 and / or the second conductive row 123.

[0059] See also Figure 4 In some embodiments, the controller 131 includes a circuit board 1311 and a conductor 1312. The circuit board 1311 is disposed in the housing 11 and electrically connected to an external trigger device. The circuit board 1311 is used to control the disconnect component 132 to cut off the second conductive bar 123. One end of the conductor 1312 is electrically connected to the circuit board 1311, and the other end of the conductor 1312 is electrically connected to the fuse 122. The conductor 1312 is used to transmit the voltage signal of the circuit breaker with a fast arc extinguishing function to the circuit board 1311.

[0060] In this way, the electrical connection between the circuit board 1311 and the fuse 122 is achieved through the conductor 1312. The conductor 1312 is a physical cable, so as to achieve stable transmission of electrical signals between the fuse 122 and the circuit board 1311, thereby improving the stability of the circuit.

[0061] Furthermore, the conductor 1312 includes two wires, one end of each wire is electrically connected to the circuit board 1311, and the other end of each wire is electrically connected to the fuse 122, one wire is connected to the positive terminal of the circuit board 1311, and the other wire is connected to the negative terminal of the circuit board 1311.

[0062] Alternatively, the conductor 1312 includes four wires, and one end of each wire is electrically connected to the circuit board 1311, and the other end of each wire is electrically connected to the fuse 122; two wires are connected to the positive terminal of the circuit board 1311, and the other two wires are connected to the negative terminal of the circuit board 1311.

[0063] Please also refer to Figure 2 and Figure 4 In some embodiments, the disconnect assembly 132 includes an actuator 1321 and a gas generator 1322. The actuator 1321 is disposed on one side of the second conductive bar 123 in the second direction and is slidably received within the inner housing 112. An airflow channel 115 is formed between the actuator 1321 and the sidewall of the inner housing 112. The gas generator 1322 is disposed on the side of the actuator 1321 facing away from the second conductive bar 123. A portion of the gas generated by the gas generator 1322 is used to drive the actuator 1321 to move in the second direction and disconnect the second conductive bar 123. Another portion of the gas generated by the gas generator 1322 flows out along the airflow channel 115 formed between the actuator 1321 and the inner housing 112 and is used to blow the arc generated when the second conductive bar 123 is disconnected toward the arc extinguishing assembly 14. Exemplarily, the gas generator 1322 may be a gas generator, and accordingly, the energy source of the gas generator is an explosive device.

[0064] Thus, when the circuit board 1311 obtains the trigger signal of the fuse 122

[0065] Alternatively, when an external trigger signal is obtained, the circuit board 1311 controls the gas generating device 1322 to drive the actuator 1321 to move along the second direction and cut off the second conductive bar 123 .

[0066] It is understandable that a vent hole (not shown) may be further provided on the actuator 1321 , and the vent hole penetrates the actuator 1321 along the second direction, and the gas generated by the gas generating device 1322 may also flow out from the vent hole.

[0067] See also Figure 4In some embodiments, there are two gas generating devices 1322, and both gas generating devices 1322 are used to drive the actuator 1321 to move along the second direction. Both gas generating devices 1322 are electrically connected to the controller 131. The two gas generating devices 1322 form a parallel circuit, and one of the gas generating devices 1322 is also electrically connected to an external trigger device through the controller 131; in this way, when any one of the gas generating devices 1322 fails, the other gas generating device 1322 can also generate a driving force to drive the actuator 1321 to perform a cutting action, so as to ensure that the second conductive bar 123 can be reliably cut off, thereby further improving the circuit safety.

[0068] See also Figure 6 In some embodiments, the actuator 1321 includes a main body 1321a and a blade 1321b. The main body 1321a is slidably connected to the inner shell 112 along the second direction and is disposed on a side of the gas generating device 1322 facing the second conductive bar 123. The blade 1321b is disposed between the main body 1321a and the second conductive bar 123 and is connected to the main body 1321a. In this way, the gas released by the detonation of the gas generating device 1322 drives the main body 1321a to drive the blade 1321b to cut off the thinned portion of the second conductive bar 123. At the same time, the main body 1321a is slidably connected to the inner shell 112, so that the inner shell 112 can guide the main body 1321a to move along the second direction to ensure that the main body 1321a drives the blade 1321b to cut off the second conductive bar 123 in a direction perpendicular to the upper end surface of the second conductive bar 123, thereby ensuring that the second conductive bar 123 can be cut stably and quickly.

[0069] Furthermore, the number of blades 1321b is the same as the number of thinning portions on the second conductive row 123 and both are multiple. For example, the number of blades 1321b and thinning portions can be two, three or four, etc., and multiple blades 1321b are arranged at intervals along the first direction and connected to the side of the main body 1321a facing the second conductive row 123. Multiple thinning portions are arranged on the second conductive row 123 at intervals along the first direction, and each blade 1321b is opposite to a corresponding thinning portion in the second direction.

[0070] In this way, by cutting multiple thinning portions simultaneously with multiple blades 1321b, any blade 1321b can cut off the corresponding thinning portion on the second conductive row 123 to achieve circuit cutting, thereby reducing the risk of failure in cutting off the second conductive row 123, improving the stability of circuit cutting, and further improving the safety of the circuit breaker with a rapid arc extinguishing function.

[0071] See also Figure 5In some embodiments, an arc extinguishing chamber 113 is further provided inside the shell 111. The arc extinguishing chamber 113 is located on the side of the second conductive bar 123 away from the disconnecting structure 13. The arc extinguishing assembly 14 is housed in the arc extinguishing chamber 113 and is used to extinguish the arc to prevent the arc from penetrating the shell 11 and causing safety hazards.

[0072] See also Figure 5 Furthermore, the arc extinguishing chamber 113 includes a first arc extinguishing chamber 1131 and a second arc extinguishing chamber 1132. The first arc extinguishing chamber 1131 is arranged at a position corresponding to the fuse 122 in the second direction of the lower shell 1112. The number of the second arc extinguishing chambers 1132 is the same as the number of blades 1321b, and is arranged on the side of the second conductive bar 123 away from the blade 1321b; the arc extinguishing assembly 14 includes a first arc extinguishing member 141 and a second arc extinguishing member 142. The number of the second arc extinguishing members 142 is the same as the number of blades 1321b. The first arc extinguishing member 141 is arranged in the first arc extinguishing chamber 1131 and is used to extinguish the arc generated by the fuse 122. The second arc extinguishing member 142 is arranged in the second arc extinguishing chamber 1132 and is used to extinguish the arc generated by the blade 1321b cutting off the second conductive bar 123.

[0073] The present application does not limit the structures of the first arc-extinguishing member 141 and the second arc-extinguishing member 142. For example, the first arc-extinguishing member 141 and the second arc-extinguishing member 142 can be steel mesh, steel balls, or filled with quartz sand.

[0074] In some embodiments, the controller 131 also includes a rectifier bridge provided on the circuit board 1311, the circuit board 1311 is electrically connected to the rectifier bridge and two gas generating devices 1322, the two gas generating devices form a parallel circuit, the rectifier bridge is electrically connected to the circuit board 1311 and one of the gas generating devices 1322, a series circuit is formed between the rectifier bridge and one of the gas generating devices 1322, and then a parallel circuit is formed with the other gas generating device 1322, so as to unidirectionally conduct the circuit between the circuit board 1311 and one of the gas generating devices 1322, so that an external trigger device can only trigger one of the gas generating devices 1322, but cannot trigger the other gas generating device 1322.

[0075] It can be understood that by utilizing the unidirectional flow of the power signal of the rectifier bridge, the external trigger signal can only flow into one of the gas generating devices 1322 and cannot flow into the other gas generating device 1322, thereby preventing the two gas generating devices 1322 from being triggered simultaneously by the external trigger device. In addition, the installation process of the rectifier bridge is a well-known technology in the art.

[0076] In some embodiments, the controller 131 further comprises an isolation transformer disposed on the circuit board 1311, the isolation transformer being electrically connected to the circuit board 1311, the rectifier bridge and one of the gas generating devices 1322, the isolation transformer, the rectifier bridge and the one of the gas generating devices 1322 forming a series circuit and the other of the gas generating devices 1322 forming a parallel circuit, so as to prevent the high voltage backflow generated by the fuse 122 from flowing to the outside.

[0077] It can be understood that the isolation transformer is composed of two winding groups, a magnetic field is generated by the primary side current, and an induced current is generated in the secondary side by electromagnetic induction, so as to achieve electrical isolation between the primary side and the secondary side. The installation process of the isolation transformer is a known technology in the art.

[0078] Further, the isolation transformer is connected in series with the rectifier bridge and one of the gas generating devices 1322, and is connected in parallel with the other of the gas generating devices 1322, so as to simultaneously achieve the functions of preventing high voltage backflow and preventing the two gas generating devices 1322 from being triggered simultaneously by an external triggering device.

[0079] The operation principle of the circuit breaker with the fast arc extinguishing function described above is as follows:

[0080] When the circuit is abnormal (short circuit or overload), the current passing through the first conductive row 121, the fuse 122 and the second conductive row 123 ablates the fuse 122, generates a trigger signal and transmits the trigger signal to the circuit board 1311, the trigger signal triggers the other of the gas generating devices 1322 after passing through the isolation transformer and the rectifier bridge on the circuit board 1311;

[0081] At the same time, the circuit board 1311 directly triggers one of the gas generating devices 1322, thereby passively triggering the two gas generating devices 1322;

[0082] Moreover, when the overload occurs, an external triggering device (for example, a master control cabinet) detects a trigger signal and transmits the trigger signal to the circuit board 1311, directly triggering one of the gas generating devices 1322, and due to the unidirectional conduction of the rectifier bridge, the trigger signal cannot flow to the other of the gas generating devices 1322, thereby preventing the other of the gas generating devices 1322 from being triggered, and only one of the gas generating devices 1322 can be triggered;

[0083] The two passively triggered gas generating devices 1322 are equivalent to being arranged in parallel, if any one of the gas generating devices 1322 fails, the actuator 1321 can still be driven to perform the action of cutting off the second conductive row 123, and the initiation time of the gas generating devices 1322 can be adjusted by changing the parameters of the isolation transformer, thereby realizing asynchronous triggering of the two gas generating devices 1322.

[0084] Furthermore, when the two gas generating devices 1322 are triggered asynchronously, the gas generated when one of the gas generating devices 1322 is detonated can be used to drive the actuator 1321 to perform the cutting action, and the gas generated when the other gas generating device 1322 is detonated can be used to blow the arc generated when the second circuit row is cut off toward the arc extinguishing component 14, wherein the time interval between the detonation of the two gas generating devices 1322 is set by the time from the second conductive row 123 being cut off to the generation of the arc, so as to further improve the arc extinguishing effect.

[0085] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A circuit breaker with a rapid arc extinguishing function, characterized in that: The circuit breaker with rapid arc extinguishing function comprises: The housing comprises an outer shell and an inner shell, wherein the inner shell is disposed inside the outer shell; A conductive component is provided through the outer shell along a first direction, and the inner shell is provided on one side of the conductive component in a second direction perpendicular to the first direction; The breaking structure includes a controller, a breaking assembly and an arc extinguishing assembly, wherein the controller is housed in the outer shell and spaced apart from the conductive assembly along the second direction, the breaking assembly is slidably housed in the inner shell in the second direction and an air flow channel is formed between the inner shell and the side wall, the arc extinguishing assembly is arranged on the other side of the conductive assembly in the second direction and is arranged opposite to the breaking assembly, and the controller is electrically connected to the conductive assembly and the breaking assembly; wherein, The controller is used to obtain the trigger signal generated by the conductive component to control the detonation of the breaking component. A portion of the gas generated when the breaking component is detonated is used to drive the breaking component to move in the second direction and cut off the conductive component. Another portion of the gas generated when the breaking component is detonated flows out along the air flow channel and is used to blow the arc generated when the conductive component is cut off toward the arc extinguishing component.

2. The circuit breaker with rapid arc extinguishing function according to claim 1, characterized in that: A strip groove is provided on the inner wall of the inner shell, and the air flow channel is formed between the strip groove and the disconnect assembly; or, The disconnecting assembly is provided with a strip-shaped notch, and the air flow channel is formed between the strip-shaped notch and the inner wall of the inner shell.

3. The circuit breaker with rapid arc extinguishing function according to claim 1, characterized in that: The conductive assembly includes a first conductive bar, a fuse, and a second conductive bar arranged in sequence along a first direction, the fuse being connected to one end of the first conductive bar and one end of the second conductive bar, and the other ends of the first conductive bar and the second conductive bar both pass through the housing; The arc extinguishing assembly and the disconnecting assembly are disposed on opposite sides of the second conductive bar in the second direction. The fuse is electrically connected to the fuse and is used to obtain a trigger signal generated by the fuse to control the disconnecting assembly to disconnect the second conductive bar.

4. The circuit breaker with rapid arc extinguishing function according to claim 3, characterized in that: The controller is also electrically connected to an external trigger device, and is used to obtain an external trigger signal and control the disconnect component to cut off the second conductive bar.

5. The circuit breaker with rapid arc extinguishing function according to claim 4, characterized in that: The disconnecting assembly comprises: an actuator, disposed on one side of the second conductive row in the second direction and slidably received in the inner shell, with the airflow channel formed between the actuator and a side wall of the inner shell; A gas generating device is provided on the side of the actuator facing away from the second conductive bar. A portion of the gas generated by the gas generating device is used to drive the actuator to move along the second direction and cut off the second conductive bar. Another portion of the gas generated by the gas generating device flows out along the air flow channel formed between the actuator and the inner shell, and is used to blow the arc generated when the second conductive bar is cut off toward the arc extinguishing assembly.

6. The circuit breaker with rapid arc extinguishing function according to claim 5, characterized in that: There are two gas generating devices, both of which are used to drive the actuator to move along the second direction. Both of the gas generating devices are electrically connected to the controller, and one of the gas generating devices is also electrically connected to an external trigger device through the controller.

7. The circuit breaker with rapid arc extinguishing function according to claim 6, characterized in that: The executive components include: a main body, slidably connected to the inner shell along the second direction and disposed on a side of the gas generating device facing the second conductive bar; A blade is disposed between the main body and the second conductive row and connected to the main body.

8. The circuit breaker with rapid arc extinguishing function according to claim 6, characterized in that: The controller includes: A circuit board electrically connected to the circuit breaker with rapid arc extinguishing function and the two gas generating devices; A rectifier bridge is electrically connected to the circuit board and one of the gas generating devices to unidirectionally conduct the circuit between the circuit board and one of the gas generating devices.

9. The circuit breaker with rapid arc extinguishing function according to claim 8, characterized in that: The controller further includes an isolation transformer disposed on the circuit board, wherein the isolation transformer is electrically connected to the circuit board and one of the gas generating devices.

10. The circuit breaker with rapid arc extinguishing function according to claim 8, characterized in that: An arc extinguishing cavity is further provided inside the housing. The arc extinguishing cavity is located on a side of the second conductive bar away from the breaking structure. The arc extinguishing assembly is accommodated in the arc extinguishing cavity and is used for arc extinguishing.

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