circuit breaker

Abstract

The application discloses a circuit breaker, which comprises a circuit breaker assembly, a control module and a flexible circuit board. The circuit breaker assembly comprises a plurality of circuit breaker units arranged side by side, each of which is internally provided with a main circuit and a transformer for detecting the current of the main circuit. The control module is arranged on the circuit breaker assembly. The flexible circuit board is arranged through the plurality of circuit breaker units, and is electrically connected with the transformers of the plurality of circuit breaker units and the control module. The flexible circuit board is provided with a plurality of temperature detection parts electrically connected with the control module, which are arranged in close contact with the main circuit and used for detecting the temperature of the main circuit. The application solves the problems of difficult wiring and assembly, and false connection caused by poor connection during detection.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more specifically to a circuit breaker equipped with a flexible circuit board. Background Technology

[0002] Most existing circuit breaker temperature detection devices require wire connections to achieve integrated processing of temperature detection signals. However, wire connections inevitably lead to problems such as a large number of wires, difficult wiring, and complex assembly. Of course, some technical solutions use rigid PCB boards to connect to the metal parts of the terminals. However, due to the rigid structure of the PCB board, the PCB board and the current transformer cannot make direct contact during implementation. This results in a loose connection between the temperature sensor soldered on the PCB board and the current transformer, failing to meet the safe creepage distance. Summary of the Invention

[0003] The main objective of this invention is to provide a circuit breaker that solves the problems of difficult wiring and assembly, as well as the problem of loose connections caused by improper connection during the testing process.

[0004] To achieve the above objectives, the present invention provides a circuit breaker, comprising:

[0005] A circuit breaker assembly, comprising a plurality of circuit breaker units arranged side by side, each of the circuit breaker units having a main circuit and a current transformer for detecting the current of the main circuit;

[0006] The control module is located in the circuit breaker assembly;

[0007] A flexible circuit board, wherein multiple circuit breaker units are disposed on the flexible circuit board, and the flexible circuit board is electrically connected to the current transformers of the multiple circuit breaker units and the control module;

[0008] The flexible circuit board has multiple temperature detection sections electrically connected to the control module. The temperature detection sections are positioned against the main circuit and are used to detect the temperature of the main circuit.

[0009] In one embodiment, multiple temperature detection units are spaced apart on one side of the flexible circuit board.

[0010] In one embodiment, the temperature detection unit has a temperature sensor, which is soldered to the end of the temperature detection unit.

[0011] In one embodiment, the temperature sensor is fitted with a fiberglass sleeve.

[0012] In one embodiment, the current transformer has a connecting wire assembly, the flexible circuit board extends outward from the side to form multiple current detection sections, the current detection sections are provided with terminals, and the connecting wire assembly is plugged into and electrically connected to the terminals.

[0013] In one embodiment, the terminal block is located at the outer end of the current detection unit or near the flexible circuit board.

[0014] In one embodiment, the number of terminal blocks is not less than the number of current transformers.

[0015] In one embodiment, in accordance with the location of the current transformer, multiple current detection units and multiple temperature detection units are staggered and spaced on the same side of the flexible circuit board.

[0016] In one embodiment, the flexible circuit board extends outward from the end away from the temperature detection section to form a signal output section, the signal output section having terminals.

[0017] In one embodiment, each of the circuit breaker units includes a first terminal, a second terminal, and a switch assembly connected in series between the first terminal and the second terminal, and the current transformer is sleeved on the line between the first terminal, the second terminal, or the first terminal and the second terminal;

[0018] The circuit breaker assembly also includes an electric component, which is electrically connected to the control module and drively connected to the switch assembly. The control module is used to control the electric component to drive the switch assembly to switch from a closed state to a closed state when the main circuit current detected by the current transformer is greater than a preset current.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention provides a circuit breaker that uses modular circuit breaker units, with multiple units arranged side-by-side to save space and reduce size. To avoid poor contact and intermittent connections caused by rigid PCB boards that cannot adjust the temperature sensing unit position, a flexible circuit board is used. Multiple circuit breaker units are connected via this flexible circuit board, simplifying the wiring structure. For ease of production, the flexible circuit board processing is simplified, reducing production costs. The flexible circuit board electrically connects the current transformers and control modules of multiple circuit breaker units. The flexible circuit board has multiple temperature sensing units, tailored to the number of current transformers. The circuit board is mounted close to the main circuit, allowing each temperature detection unit to directly monitor the main circuit temperature. This effectively improves detection accuracy and avoids problems such as numerous leads, difficult wiring, complex assembly, and loose connections caused by using lead wire connections. The temperature detection units, mounted close to the main circuit, transmit the detected main circuit temperature to the control module, which then controls the individual circuit breaker's on / off state based on the detected main circuit temperature. Temperature detection units are arranged in conjunction with the number of current transformers, with each unit detecting its corresponding main circuit temperature. This integrated processing of temperature detection signals avoids the impact of only detecting a portion or a single main circuit temperature on the detection results, further optimizing detection accuracy. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the circuit breaker of the present invention;

[0023] Figure 2 This is an exploded view of an embodiment of the circuit breaker of the present invention;

[0024] Figure 3 This is a schematic diagram of the circuit breaker assembly of the present invention;

[0025] Figure 4 This is a schematic diagram of the flexible circuit board of the present invention;

[0026] In the diagram: 100, circuit breaker unit; 101, current transformer; 1011, coil; 1012, connecting wire assembly; 102, stop; 1021, limit mounting slot; 103, switch assembly; 200, flexible circuit board; 201, temperature detection unit; 2011, temperature sensor; 202, current detection unit; 2021, terminal block; 203, signal output unit; 2031, terminal block; 300, control module; 301, signal interface.

[0027] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that if all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a specific posture, the directional indications will also change accordingly if the specific posture changes.

[0030] In this invention, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance, or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. If the description in this invention refers to "A and / or B," it indicates that solution A or solution B is included, or that solutions A and B are included. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0031] This invention provides a circuit breaker, with reference to Figures 1 to 4 This includes circuit breaker assemblies, control modules, and flexible circuit boards.

[0032] The circuit breaker assembly includes multiple circuit breaker units arranged side by side, each of which has a main circuit and a current transformer for detecting the current in the main circuit.

[0033] A control module is provided in the circuit breaker assembly. Without limiting the invention, the control module may be located on one side of multiple circuit breaker units arranged side-by-side; or located between multiple circuit breaker units; or, multiple control modules may be provided, each located between multiple circuit breaker units for connection to a corresponding circuit breaker unit; or, of course, the control module may be integrated within the corresponding circuit breaker unit.

[0034] A flexible circuit board, through which multiple circuit breaker units are disposed, and the flexible circuit board is electrically connected to the current transformers of the multiple circuit breaker units and the control module.

[0035] The flexible circuit board has multiple temperature detection sections electrically connected to the control module. The temperature detection sections are positioned against the main circuit and are used to detect the temperature of the main circuit.

[0036] This invention provides a circuit breaker that uses modular circuit breaker units, with multiple units arranged side-by-side to save space and reduce size. To avoid poor contact and intermittent connections caused by rigid PCB boards that cannot adjust the temperature sensing unit position, a flexible circuit board is used. Multiple circuit breaker units are connected via this flexible circuit board, simplifying the wiring structure. For ease of production, the flexible circuit board processing is simplified, reducing production costs. The flexible circuit board electrically connects the current transformers and control modules of multiple circuit breaker units. The flexible circuit board has multiple temperature sensing units, tailored to the number of current transformers. The circuit board is mounted close to the main circuit, allowing each temperature detection unit to directly monitor the main circuit temperature. This effectively improves detection accuracy and avoids problems such as numerous leads, difficult wiring, complex assembly, and loose connections caused by using lead wire connections. The temperature detection units, mounted close to the main circuit, transmit the detected main circuit temperature to the control module, which then controls the individual circuit breaker's on / off state based on the detected main circuit temperature. Temperature detection units are arranged in conjunction with the number of current transformers, with each unit detecting its corresponding main circuit temperature. This integrated processing of temperature detection signals avoids the impact of only detecting a portion or a single main circuit temperature on the detection results, further optimizing detection accuracy.

[0037] It is understood that the flexible circuit board 200 described in this invention uses an FPGA (Field-Programmable Gate Array). FPGA provides a programmable substrate and is one of the devices with the shortest design cycle, lowest power consumption, and highest integration, compatibility, and reliability in ASIC circuits. It can execute and implement circuits at a relatively fast speed.

[0038] The flexible circuit board 200 carries multiple circuit breaker units. In one embodiment, the flexible circuit board 200 shown in this application is a flexible board, specifically made of polyamide materials used in flexible boards. Using a flexible board avoids the use of rigid PCB boards connected to the circuit breakers, which are subject to stress and compression during installation or use, affecting normal operation. Without limiting the invention, the flexible circuit board 200 can be set independently of the circuit breaker assembly; that is, the flexible circuit board 200 and the circuit breaker are not fixed as a single structure, allowing the flexible circuit board 200 to be detachably installed within the circuit breaker assembly, facilitating adjustment, maintenance, and replacement. The temperature detection unit 201 is positioned close to the circuit breaker assembly, reducing impedance changes caused by wire connections and improving the stability of the detection results.

[0039] It is understood that this invention includes multiple circuit breaker units 100, which are arranged side by side and interconnected. Without limiting the scope of this invention, the multiple circuit breaker units 100 can be arranged separately, and each circuit breaker can have snap-fit ​​components or connection interfaces for electrical connection on adjacent sides to assemble into a single structure, making the overall structure more stable. Connection interfaces can be reserved between two adjacent circuit breaker units 100. Without limiting the scope of this application, installation gaps or mounting positions can be provided at the corresponding connection interface locations to facilitate electrical connection.

[0040] Optionally, the temperature detection unit is inserted through the gap between the corresponding current transformers, and multiple temperature detection units 201 are spaced apart on one side of the flexible circuit board 200. Alternatively, multiple temperature detection units 201 can be spaced apart on both sides of the flexible circuit board 200. The former embodiment simplifies the structure of the individual circuit breaker, reduces the overall size of the circuit breaker assembly, and saves on the use of flexible circuit board materials; in the latter embodiment, the gaps between multiple current transformers can be utilized to a great extent to achieve electrical connection.

[0041] To achieve the setting of being attached to the main circuit, without imposing any limitations on this application, the temperature detection unit may also be set at the end of the flexible circuit board.

[0042] In one embodiment, the circuit breaker assembly has a plurality of circuit breaker units 100, each circuit breaker unit 100 having a current transformer 101, and a number of temperature detection units is set corresponding to the number of current transformers, the number of temperature detection units being no less than the number of current transformers.

[0043] In one embodiment, multiple temperature detection units are spaced apart on one side of the flexible circuit board.

[0044] It is understood that multiple temperature detection units 201 are arranged in a comb-like pattern on one side of the flexible circuit board 200. Specifically, multiple circuit breaker units 100 can be arranged at equal or unequal intervals on one side of the flexible circuit board 200, so that the flexible circuit board 200 passes through multiple circuit breaker units and is inserted into one side of the circuit breaker assembly, with the temperature detection units passing through the corresponding circuit breaker units. Without limiting the invention, the distance between the current transformers of the multiple circuit breaker units and the centers of the corresponding temperature detection units can be used to ensure that the temperature detection units are close to the corresponding main circuit.

[0045] Optionally, multiple temperature detection units 201 may be spaced apart on both sides of the flexible circuit board 200, so that the flexible circuit board 200 is reciprocated in a serpentine manner between multiple circuit breaker units 100.

[0046] The current transformer 101 has a coil 1011. Without limiting the present invention, the flexible circuit board 200 can be inserted into one side of multiple circuit breaker units arranged side by side, so that the temperature detection unit 201 passes through the middle of the coil and is inserted into the corresponding side of the current transformer or any position for detecting the main circuit temperature. The temperature sensor or other detection component or detection position on the temperature detection unit for detecting the main circuit temperature is wound around to one side or end of the corresponding current transformer and is set against the corresponding main circuit. Specifically, the temperature sensor 2011 can be set at the end of the temperature detection unit 201, so that the end of the temperature detection unit 201 is inserted into any position suitable for detecting the main circuit temperature, such as one side of the current transformer 101, and the temperature sensor 2011 on the temperature detection unit 201 is set against the main circuit to detect the main circuit temperature.

[0047] In one embodiment, the temperature detection unit has a temperature sensor, which is soldered to the end of the temperature detection unit.

[0048] A temperature sensor 2011 is installed, and the main circuit temperature detection signal is transmitted to the signal processing unit such as the control module via flexible circuit board wiring. Without limiting the invention, the control module 300 can be located inside or externally connected to the circuit breaker unit. The flexible circuit board 200 is connected to the control module via terminals and connection interfaces to transmit the main circuit temperature. When an overload or short circuit occurs, the current rises rapidly, causing the temperature around the transformer to rise. To avoid excessive temperature affecting the normal operation and service life of the circuit breaker, the temperature sensor detects the main circuit temperature of each corresponding circuit breaker unit in real time. The control module corrects the current detection signal based on the detected main circuit temperature. Specifically, a switching assembly can be installed in each circuit breaker unit. The control module controls the switching assembly to operate, thereby disconnecting or connecting the circuit breaker unit. Without limiting the invention, the control module presets a temperature threshold. When the main circuit temperature is higher than or lower than this temperature threshold, the control module switches the switching assembly from the closed state to the open state to disconnect the corresponding circuit breaker unit.

[0049] Furthermore, since the temperature detection unit 201 is set close to the main circuit, the impedance change caused by the wires can be reduced. The temperature detection unit 201 directly detects the temperature of the main circuit, and the control module 300 corrects the current detection signal based on the detected main circuit temperature, making the accuracy and stability of temperature detection and current detection higher.

[0050] In one embodiment, the temperature sensor is fitted with a fiberglass sleeve.

[0051] By incorporating high-temperature resistant components such as fiberglass sheaths, a temperature probe capable of contacting high-voltage metal terminals is formed. The high-temperature resistant components effectively protect the temperature sensor, preventing high temperatures from affecting the detection results, thus enabling accurate testing of the main circuit temperature and optimizing the stability of the temperature sensor during detection.

[0052] Without limiting the present invention, the temperature sensor 2011 can be set on one side of the flexible circuit board 200 according to the circuit connection relationship, and the temperature sensor can be set at any position suitable for detecting the temperature of the main circuit, such as the middle or end of the temperature detection unit, according to the detection position of each current transformer. Any temperature detection unit 201 can be equipped with one or more temperature sensors 2011.

[0053] In one embodiment, the current transformer has a connecting wire assembly 1012, the flexible circuit board extends outward from the side to form multiple current detection sections, the current detection sections are provided with terminals, and the connecting wire assembly 1012 is plugged into and electrically connected to the terminals.

[0054] Each circuit breaker unit contains a main circuit and a current transformer. The current transformer detects the main circuit current and is used to collect data such as main circuit current and leakage current parameters. A connecting wire assembly is installed and electrically connected to the corresponding terminal block on the flexible circuit board. The flexible circuit board connects to the control module to transmit the main circuit current detection signal. Depending on the actual application, a switch assembly can be installed in each circuit breaker unit. The connecting wire assembly, switch assembly, and control module are electrically connected respectively. The current detection unit transmits the current detection signal detected by the current transformer to the control module. The control module then controls the corresponding switch assembly to operate based on the current detection signal, i.e., controls the switch assembly to close or open the circuit, preventing the current rise caused by short circuits or current overloads from affecting the current transformer.

[0055] Specifically, the current transformer 101 can be installed inside the circuit breaker unit 100 via a structure suitable for fixed installation inside the circuit breaker unit, such as a current transformer mounting base. Alternatively, a flexible circuit board can be inserted into one side of multiple circuit breaker units arranged side by side, so that the current detection unit is inserted between two current transformers. The width of the current detection unit is set not to be greater than the distance between the two current transformer mounting bases, and it is used to detect the corresponding main circuit current.

[0056] In one embodiment, the current detection unit 202 is provided with a terminal block 2021, which is located at the outer end of the current detection unit or near the flexible circuit board in conjunction with the position of the connecting wire assembly.

[0057] Without limiting the present invention, the terminal block 2021 is disposed on one side of the flexible circuit board 200 according to the circuit connection relationship, and the terminal block is disposed at any position such as the middle or end of the current detection unit 202 corresponding to the position of the connecting wire assembly. Any current detection unit 202 may be provided with one or more terminal blocks 2021, and multiple terminal blocks 2021 may be disposed at different positions of the same current detection unit 202.

[0058] It is understood that, without limiting the present invention, the terminal block 2021 can be disposed at or against the current detection unit 202, temperature detection unit 201, side of flexible circuit board 200, or center of flexible circuit board 200, corresponding to the location of the connecting wire assembly, in any position suitable for practical use. To facilitate the processing of flexible circuit board 200, and in accordance with the location of the connecting wire assembly, the terminal block 2021 is disposed at the outer end of the current detection unit or at a position close to the flexible circuit board. The current detection unit 202 extends outward from the side of flexible circuit board 200. Here, the outer end of the current detection unit refers to the outer end of the current detection unit 202 extending outward from the flexible circuit board and away from it. Optionally, the terminal block can be disposed at the end and / or near the end of the current detection unit.

[0059] In one embodiment, the terminal block is located at the outer end of the current detection unit or near the flexible circuit board.

[0060] Depending on the actual use, the current detection unit 202 can be set on the same side or different side as the temperature detection unit 201, and the current detection unit 202 and the temperature detection unit 201 corresponding to the same circuit breaker unit can be set on the same side or different side of the flexible circuit board.

[0061] Optionally, depending on the actual needs of use, a connecting wire assembly 1012 may be attached to one side of the current transformer 101 in the form of a wire connection, etc., and a temperature detection part 201 may be attached to the main circuit. The length of the temperature detection part 201 shall not be greater than the length of the current detection part 202. The temperature detection part refers to the length of the temperature detection part 201 extending outward from the flexible circuit board 200, and the length of the current detection part refers to the length of the current detection part 202 extending outward from the flexible circuit board 200.

[0062] It should be noted that the temperature detection unit 201 and the current detection unit 202 extend outward from the flexible circuit board 200 to form a temperature detection unit 201 and a current detection unit 202, respectively. Depending on the actual needs of the application, the temperature detection unit 201 and the current detection unit 202 can be arranged in a form that is perpendicular to and / or not perpendicular to the flexible circuit board 200.

[0063] Without limiting the present invention, the flexible circuit board 200 extends outward to form an extension. Depending on the actual requirements of the actual use, the temperature sensor 2011 and the terminal block 2021 can be placed in any position suitable for actual use on the same extension to receive and transmit the main circuit temperature detection signal and the current detection signal.

[0064] In one embodiment, the number of terminal blocks is not less than the number of current transformers.

[0065] Depending on the specific requirements of the application, each current transformer can be configured to have one or more connection wire assemblies. In order to receive the corresponding main circuit current detection signal, at least one terminal block is provided in the current detection section of the flexible circuit board 200, so that the number of terminal blocks is not less than the number of current transformers. This allows it to be used in various circuit breaker assemblies with different numbers of current transformers, thereby expanding the application range of the flexible circuit board and facilitating its processing.

[0066] Without limiting the scope of this application, the number of current detection units may be equal to or not equal to the number of current transformers, provided that the number of terminal blocks is not less than the number of connection wire assemblies.

[0067] like Figure 1As shown, in the wiring of the flexible circuit board, when the number of terminals on the flexible circuit board is greater than the number of connecting wire assemblies, only the necessary terminals can be soldered onto the flexible circuit board to reduce the use of corresponding components and reduce material consumption.

[0068] In one embodiment, in accordance with the location of the current transformer, multiple current detection units and multiple temperature detection units are staggered and spaced on the same side of the flexible circuit board. This is used to receive and transmit corresponding main circuit current detection signals and main circuit temperature detection signals. Without limiting the invention, the distance between temperature detection units 201 and current detection units 202 corresponding to the same circuit breaker unit can be no greater than the distance between any two temperature detection units 201 and any two current detection units 202.

[0069] The circuit breaker unit 100 housing has a stop 102 suitable for the current transformer 101. The stop 102 forms a limiting mounting groove 1021 for the current transformer 101 within the inner cavity of the circuit breaker unit housing. The stop 102 separates the current transformer 101 from the internal structural components and part of the main circuit circuit of the circuit breaker unit 100 to avoid mutual interference. The stop 102 can be used to limit the flexible circuit board 200 within the gap between the current transformer 101 and the stop 102, ensuring stable positioning of the flexible circuit board 200 and preventing displacement of the flexible circuit board 200 that could cause displacement of the temperature detection unit 201 and the current detection unit 202, affecting the detection results. Of course, without limiting the invention, the flexible circuit board can also be fixed within the circuit breaker assembly by means of pins, screws, welding, snap-fitting, etc.

[0070] In one embodiment, the flexible circuit board extends outward from the end away from the temperature detection section to form a signal output section, the signal output section having terminals.

[0071] The temperature sensor 2011 and the terminal block 2021 output signals through the signal output section 203. Specifically, the terminal block can be set at the end of the signal output section.

[0072] In one embodiment, the control module 300 has a signal interface 301, and multiple circuit breaker units 100 have connection positions on their sides. The control module 300 has a signal interface 301 on one side, and the wiring terminal 2031 of the signal output unit is led out through the connection positions of the multiple circuit breaker units 100 for connection to the signal interface 301 of the control module 300.

[0073] It is understood that the connection positions are located on the side of the housing of multiple circuit breaker units, and the signal interface 301 is located on the side of the housing of the control module. Specifically, the wiring terminal 2031 is led out from the connection position of the circuit breaker unit closest to the control module 300 and connected to the signal interface 301 of the control module 300. The signal input part of the control module 300 is electrically connected to the temperature detection part 201 and the current detection part 202 corresponding to the multiple circuit breaker units 100 via the signal interface 301.

[0074] In one embodiment, each circuit breaker unit includes a first terminal, a second terminal, and a switch assembly connected in series between the first and second terminals. The current transformer is sleeved on the line between the first and second terminals or between the first and second terminals. Here, the first terminal (not shown) and the second terminal (not shown) can be located on opposite sides of the circuit breaker unit. The first and second terminals can be used as electrical input and output terminals, respectively, and can be interchanged.

[0075] The circuit breaker assembly also includes an electric component, which is electrically connected to the control module and drively connected to the switch assembly. The control module is used to control the electric component to drive the switch assembly to switch from a closed state to a closed state when the main circuit current detected by the current transformer is greater than a preset current.

[0076] Specifically, the electric component can be installed inside the control module housing, externally connected to the control module, or correspondingly installed in each circuit breaker unit. Each circuit breaker unit 100 is equipped with a switch assembly and a current transformer. The control module 300 receives the main circuit temperature detection signal transmitted by the temperature detection unit and the current detection signal transmitted by the current detection unit via the signal interface 301. Based on the received main circuit temperature detection signal and current detection signal, the control module judges the current state of the circuit breaker unit 100, determines whether the current transformer 101 has overcurrent, short circuit, leakage, or other phenomena, and controls the electric component to drive the switch assembly 103 to move. The switch assembly 103 cuts off or connects the circuit breaker unit 100, further controlling the corresponding main circuit current, so as to automatically control the circuit breaker on / off and signal transmission, quickly detect and protect the circuit breaker circuit, and optimize safety.

[0077] Specifically, when the main circuit current detected by the current transformer is greater than the preset current, the control module controls the electric component to drive the switch assembly 103 to move, switching from the closed state to the open state. The switch assembly may include a handle, which extends outside the circuit breaker unit through an opening at the top of the circuit breaker unit's housing.

[0078] As an example, in one embodiment, the circuit breaker assembly has four individual circuit breaker units and a control module. Each individual circuit breaker unit has a current transformer. The number of temperature detection sections on the flexible circuit board corresponds to the number of current transformers. Each temperature detection section has a temperature sensor at its end, which is attached to the main circuit to detect the temperature of the main circuit and transmit a temperature detection signal. Each current transformer in the individual circuit breaker unit has a connecting wire assembly. Combined with the structure of the individual circuit breaker unit, three current detection sections extend outward from one side of the flexible circuit board. A terminal block is provided at the outer end of the current detection section or near the flexible circuit board. The number of terminal blocks is not less than the number of current transformers, and it is used to receive and transmit the current detection signal transmitted by the connecting wire assembly of the current transformer. The temperature detection sections and current detection sections are parallel to each other and are staggered at intervals on one side of the flexible circuit board in a manner perpendicular to the flexible circuit board. The end of the flexible circuit board away from the temperature detection section extends outward to form a signal output section. The end of the signal output section has a terminal block, which is electrically connected to the signal interface of the control module to transmit the temperature detection signal and the current detection signal.

[0079] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A circuit breaker, characterized in that, include: A circuit breaker assembly, comprising a plurality of circuit breaker units arranged side by side, each of the circuit breaker units having a main circuit and a current transformer for detecting the current of the main circuit; The control module is located in the circuit breaker assembly; A flexible circuit board, wherein multiple circuit breaker units are disposed on the flexible circuit board, and the flexible circuit board is electrically connected to the current transformers of the multiple circuit breaker units and the control module; The flexible circuit board has multiple temperature detection sections electrically connected to the control module. The temperature detection sections are arranged against the main circuit and are used to detect the temperature of the main circuit. Multiple temperature detection units are spaced apart on one side of the flexible circuit board, so that multiple circuit breaker units are passed through the flexible circuit board and inserted into one side of the circuit breaker assembly. The temperature detection unit has a temperature sensor, which is welded to the end of the temperature detection unit. The current transformer has a connecting wire assembly, and the flexible circuit board extends outward from the side to form multiple current detection sections. Each current detection section is provided with a terminal block, and the connecting wire assembly is plugged into and electrically connected to the terminal block. The terminal block is located at the outer end of the current detection unit or near the flexible circuit board.

2. The circuit breaker according to claim 1, characterized in that, The temperature sensor is fitted with a fiberglass sleeve.

3. The circuit breaker according to claim 1, characterized in that, The number of terminals is not less than the number of current transformers.

4. The circuit breaker according to claim 1, characterized in that, In accordance with the location of the current transformer, multiple current detection units and multiple temperature detection units are staggered and arranged on the same side of the flexible circuit board.

5. The circuit breaker according to any one of claims 1-4, characterized in that, The flexible circuit board extends outward from the end away from the temperature detection unit to form a signal output unit, which has a wiring terminal.

6. The circuit breaker according to claim 5, characterized in that, Each of the circuit breakers includes a first terminal, a second terminal, and a switch assembly connected in series between the first terminal and the second terminal. The current transformer is sleeved on the line between the first terminal, the second terminal, or the first terminal and the second terminal. The circuit breaker assembly also includes an electric component, which is electrically connected to the control module and drively connected to the switch assembly. The control module is used to control the electric component to drive the switch assembly to switch from a closed state to a closed state when the main circuit current detected by the current transformer is greater than a preset current.

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