Intelligent circuit breaker and intelligent circuit breaker control system

Abstract

The utility model discloses an intelligent circuit breaker and an intelligent circuit breaker control system, and the intelligent circuit breaker comprises a switch assembly which is used for controlling the connection or disconnection between a main loop input terminal and a main loop output terminal; the main body temperature sensor is arranged on the main loop input terminal and / or the main loop output terminal, and the temperature sensor is used for detecting the temperature of the main loop input terminal and / or the main loop output terminal and outputting a main body temperature signal; the environment temperature sensor is arranged on the circuit breaker main body, and the environment temperature sensor is used for detecting environment temperature and environment temperature signals; the control circuit is arranged on the circuit control board, and the control circuit is electrically connected with the output end of the comparator and the controlled end of the switch assembly; and the control circuit is used for controlling the switch assembly to disconnect the electrical connection between the main loop input terminal and the main loop output terminal according to the output circuit break trigger signal. According to the utility model, the safety and reliability of the intelligent circuit breaker are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and in particular to an intelligent circuit breaker and an intelligent circuit breaker control system. Background Art

[0002] A circuit breaker is a mechanical switch that can close, carry and disconnect current under normal circuit conditions, and can connect and disconnect carrying current under specified abnormal circuit conditions and within a certain period of time. Circuit breakers are important devices for control and protection in power systems, and their safety has an important impact on the normal operation of the power grid and the safety of electricity use.

[0003] Circuit breakers are often opened and closed frequently, and because of the concentrated voltage, they are often in dangerous areas. Existing circuit breakers often have the circuit breaker terminals not tightened, causing heat and damage to the circuit breaker. In an environment with high humidity and condensation, the circuit breaker will also be damaged. Poor contact between the moving and static contacts of the circuit breaker causes heat and voltage reduction. The cables and wires on the terminals are not fixed, causing the moving and static contacts to be stressed. These situations often occur, and the safety and reliability of the circuit breaker working in harsh environments cannot be fully guaranteed. Utility Model Content

[0004] The main purpose of the utility model is to provide an intelligent circuit breaker and an intelligent circuit breaker control system, aiming to improve the safety and reliability of the intelligent circuit breaker.

[0005] To achieve the above object, the utility model provides an intelligent circuit breaker, which includes:

[0006] The circuit breaker body has a main circuit input terminal, a main circuit output terminal and a switch assembly. The main circuit input terminal, the switch assembly and the main circuit output terminal are connected to form a main circuit. The switch assembly is used to control the connection or disconnection between the main circuit input terminal and the main circuit output terminal;

[0007] a main body temperature sensor, arranged at the main circuit input terminal and / or the main circuit output terminal, the temperature sensor being used to detect the temperature of the main circuit input terminal and / or the main circuit output terminal and output a main body temperature signal;

[0008] An ambient temperature sensor is arranged on the circuit breaker body, and is used to detect ambient temperature and ambient temperature signal;

[0009] Circuit control board;

[0010] A subtractor, wherein two input ends of the subtractor are respectively connected to the main body temperature sensor and the ambient temperature sensor, and the subtractor is used to calculate the temperature rise value at the main circuit input terminal and / or the main circuit output terminal according to the main body temperature signal and the ambient temperature signal;

[0011] A comparator, one input end of the comparator is connected to the subtractor, and the other input end of the comparator is connected to the subtractor; when it is detected that the temperature rise value at the main circuit input terminal and / or the main circuit output terminal calculated by the ambient temperature signal exceeds the set safety alarm threshold, a circuit breaking trigger signal is output;

[0012] A control circuit is arranged on the circuit control board, and the control circuit is electrically connected to the output end of the comparator and the controlled end of the switch component respectively; the control circuit is used to control the switch component to disconnect the electrical connection between the main circuit input terminal and the main circuit output terminal according to the output circuit breaking trigger signal.

[0013] Optionally, the number of the main body temperature sensors is at least two, and the at least two main body temperature sensors are respectively arranged at the main circuit input terminal and the main circuit output terminal.

[0014] Optionally, the control circuit includes:

[0015] A subtractor, wherein two input ends of the subtractor are respectively connected to the main body temperature sensor and the ambient temperature sensor, and the subtractor is used to calculate the temperature rise value at the main circuit input terminal and / or the main circuit output terminal according to the main body temperature signal and the ambient temperature signal;

[0016] A comparator, one input end of the comparator is connected to the subtractor, the other input end of the comparator is connected to the subtractor, and the output end of the comparator is connected to the switch component; the comparator is used to control the switch component to disconnect the electrical connection between the main circuit input terminal and the main circuit output terminal when it is detected that the temperature rise value at the main circuit input terminal and / or the main circuit output terminal calculated by the ambient temperature signal exceeds the set safety alarm threshold.

[0017] Optionally, the intelligent circuit breaker further includes:

[0018] A current sensor is disposed in the circuit breaker body, and is used to detect the current value in the main circuit and output a corresponding current detection signal;

[0019] The control circuit is also connected to the current sensor, and is also used to control the switch component to connect or disconnect the electrical connection between the main circuit input terminal and the main circuit output terminal according to the current detection signal, the main body temperature signal and the ambient temperature signal.

[0020] Optionally, the intelligent circuit breaker further includes:

[0021] An indicator light, arranged on the circuit breaker body, the indicator light being connected to the control circuit;

[0022] The control circuit is also used to control the indicator light to work according to the current detection signal, the main body temperature signal and the ambient temperature signal, so as to issue corresponding indication information.

[0023] Optionally, the intelligent circuit breaker further includes:

[0024] A communication module is arranged on the circuit breaker body, the communication module is connected to the control circuit, and is used to encode the signal output by the control circuit and upload it to an Internet terminal so that the Internet terminal can perform safety management on the intelligent circuit breaker.

[0025] Optionally, the intelligent circuit breaker further includes:

[0026] A memory connected to the control circuit, the memory being used to store the temperature rise value at the main circuit input terminal and / or the main circuit output terminal;

[0027] The control circuit is used to control the switch component to connect / disconnect the electrical connection between the main circuit input terminal and the main circuit output terminal according to the multiple stored temperature rise values, and output a detection reminder signal.

[0028] The utility model also provides an intelligent circuit breaker control system, comprising the intelligent circuit breaker as described above.

[0029] The utility model can detect the temperature at the main circuit input terminal and the main circuit output terminal through the main body temperature sensor, and the ambient temperature sensor detects the temperature of the current environment in real time, and outputs the detected temperature signal to the control circuit, so that the control circuit controls the switch component to connect or disconnect the electrical connection between the main circuit input terminal and the main circuit output terminal according to the main body temperature signal and the ambient temperature signal. The utility model is conducive to improving the safety and reliability of the intelligent circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 The figure is a schematic diagram of the circuit structure of an embodiment of the intelligent circuit breaker of the utility model.

[0032] Description of Figure Numbers:

[0033] Label name Label name 100 Circuit breaker body 400 Control Circuit 110 Switch components 410 Subtractor CN1 Main circuit input terminal 420 Comparator CN2 Main circuit output terminal 500 Current Sensors 200 Body temperature sensor 600 Communication Module 300 Ambient temperature sensor

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] The utility model provides an intelligent circuit breaker.

[0040] Reference Figure 1 In one embodiment of the utility model, the intelligent circuit breaker comprises:

[0041] The circuit breaker body 100 has a main circuit input terminal CN1, a main circuit output terminal CN2 and a switch assembly 110. The main circuit input terminal CN1, the switch assembly 110 and the main circuit output terminal CN2 are connected to form a main circuit. The switch assembly 110 is used to control the connection or disconnection between the main circuit input terminal CN1 and the main circuit output terminal CN2.

[0042] A main body temperature sensor 200, which is arranged at the main circuit input terminal CN1 and / or the main circuit output terminal CN2, and is used to detect the temperature of the main circuit input terminal CN1 and / or the main circuit output terminal CN2, and output a main body temperature signal;

[0043] An ambient temperature sensor 300 is disposed on the circuit breaker body 100 and is used to detect the ambient temperature and output a corresponding ambient temperature signal;

[0044] Circuit control board;

[0045] A subtractor 410, wherein two input ends of the subtractor 410 are respectively connected to the main body temperature sensor and the ambient temperature sensor, and the subtractor 410 is used to calculate the temperature rise value at the main circuit input terminal and / or the main circuit output terminal according to the main body temperature signal and the ambient temperature signal;

[0046] A comparator 420, one input end of the comparator 420 is connected to the subtractor 410, and the other input end of the comparator 420 is connected to the subtractor 410; when it is detected that the temperature rise value at the main circuit input terminal and / or the main circuit output terminal calculated by the ambient temperature signal exceeds the set safety alarm threshold, a circuit breaking trigger signal is output;

[0047] A control circuit is arranged on the circuit control board, and the control circuit is electrically connected to the output end of the comparator 420 and the controlled end of the switch component respectively; the control circuit is used to control the switch component to disconnect the electrical connection between the main circuit input terminal and the main circuit output terminal according to the output circuit breaking trigger signal.

[0048] The control circuit 400 is electrically connected to the main body temperature sensor 200, the ambient temperature sensor 300 and the switch component 110 respectively; the control circuit 400 is used to control the switch component 110 to connect or disconnect the electrical connection between the main circuit input terminal CN1 and the main circuit output terminal CN2 according to the main body temperature signal and the ambient temperature signal.

[0049] In this embodiment, the switch assembly 110 may be provided with a motor, a gearbox, a worm gear and a transmission gear set; the motor is connected to the control circuit 400, and a driving gear is installed on the shaft of the motor; the input end of the gearbox meshes with the driving gear, and the worm gear is installed on the output end, and the worm gear meshes with the input end of the transmission gear set; the output end of the transmission gear set can mesh or disengage with the opening and closing shaft cylinder. The control circuit 400 can be installed along the side wall of the circuit breaker body 100 to reduce space occupation. The control circuit 400 can be provided with a circuit control board, and a voltage sampling circuit, a current sampling circuit, an electricity metering circuit, an overcurrent protection circuit, a communication module 600, a motor drive circuit, etc. provided on the circuit control board, but it is not limited thereto. The control circuit 400 can control the operation of the switch assembly according to the data collected by the above circuits. Compared with the current use of a mechanical structure to make the release pull the operating mechanism to act, the use of a sensor that detects and outputs electrical signals can make the detection value of the circuit breaker more accurate, and at the same time, the specific temperature value, current value, voltage value and contact position can be clearly known, and the circuit fault can be reasonably judged, such as judging whether the low-voltage circuit breaker is over-voltage or under-voltage according to the voltage of the power circuit; it should be noted that the stable temperature rise under the current size can be calculated according to the following formula:

[0050]

[0051] Among them, R represents the conductor resistance, a represents the temperature coefficient of resistance, and F represents the surface area. For the circuit breaker, a and F are fixed. In addition to the impedance of the conductor itself, R should also add the contact resistance of the wire R=R0+R1. R0 is the internal conductor resistance of the circuit breaker, and R1 is the contact resistance. In this way, according to the current current, the temperature terminal will have a reasonable heating range, and the temperature difference between the upper and lower terminals should be close to the same. When the temperature itself exceeds the temperature rise limit inferred by the current or the temperature difference between the upper and lower terminals reaches a certain distance, it can be considered that the side with the temperature rise is affected by the conductor temperature or the wiring is poor, and an alarm signal can be issued based on this judgment. Therefore, when the current of the power circuit is too large, it indicates that the current low-voltage circuit breaker has an overcurrent fault; when the ambient temperature of the contact exceeds the safety threshold temperature, it indicates that the contact of the current low-voltage circuit breaker has an overheating fault. In addition, the technical solution of the utility model mainly emphasizes the process of how the control circuit 400 performs fault judgment by connecting the temperature sensor to the control circuit, and connecting the control circuit to the switch assembly. The hardware part is implemented by the existing single electronic component combination or integrated circuit, which will not be described here one by one. The software part can refer to the existing and existing technologies. The new low-voltage circuit breaker with data detection function can be opened in time when danger occurs, which greatly improves the reliability of the intelligent circuit breaker. The main circuit input terminal CN1 and the main circuit output terminal CN2 are not limited to specific use as input and output in actual applications. According to the characteristics of the circuit breaker, the main circuit input terminal CN1 and the main circuit output terminal CN2 can be used as input or output in actual applications. The naming here is just for ease of understanding and does not limit its actual use.

[0052] In this embodiment, the control circuit 400 can be implemented by an integrated IC, such as a microprocessor unit such as a single chip microcomputer, DSP and FPGA, which is not limited here. The control circuit 400 can detect whether the temperature rise of the temperature point exceeds the set safety alarm threshold, and disconnect the main circuit protection when the detection exceeds the alarm threshold; the control circuit 400 can detect the terminal abnormality in advance when the terminal temperature rise does not reach the dangerous value according to the current main circuit current, and the control circuit 400 can detect the temperature rise range under the current ambient temperature and current according to the standard impedance of the terminal according to the ambient temperature and the main circuit current. When the temperature rise exceeds the estimated range, it can be determined that the terminal is in an abnormal state, and an alarm is issued to optionally disconnect the main circuit to remind the user to check the terminal condition. At this time, the temperature rise may not exceed the absolute value alarm threshold range, which is an advance prediction behavior.

[0053] In this embodiment, a subtractor 410, two input ends of which are respectively connected to the main body temperature sensor 200 and the ambient temperature sensor 300, and the subtractor 410 is used to calculate the temperature rise value at the main circuit input terminal CN1 and / or the main circuit output terminal CN2 according to the main body temperature signal and the ambient temperature signal;

[0054] A comparator 420, one input end of the comparator 420 is connected to the subtractor 410, the other input end of the comparator 420 is connected to the subtractor 410, and the output end of the comparator 420 is connected to the control circuit 400; the comparator 420 is used to output a circuit breaking trigger signal to the control circuit 400 when it is detected that the temperature rise value at the main circuit input terminal CN1 and / or the main circuit output terminal CN2 exceeds the set safety alarm threshold, so that the control circuit 400 controls the switch component 110 to disconnect the electrical connection between the main circuit input terminal CN1 and the main circuit output terminal CN2.

[0055] In this embodiment, the number of subtractors 410 can be one or two, and can be specifically set according to the number of main temperature sensors 200. The two subtractors 410 respectively calculate the temperature rise values ​​at the main circuit input terminal CN1 and the main circuit output terminal CN2, and the comparator 420 can compare the received temperature rise value with the set safety alarm threshold. When the temperature rise value at the main circuit input terminal CN1 and / or the main circuit output terminal CN2 exceeds the set safety alarm threshold, the output signal of the comparator 420 is flipped, thereby triggering the control circuit to control the switch component 110 to disconnect the electrical connection between the main circuit input terminal CN1 and the main circuit output terminal CN2, so as to cut off the main circuit and realize self-protection of the circuit breaker.

[0056] It is understandable that in the wiring of the main circuit of the circuit breaker, because the user tightens it manually, there is a certain error in the contact pressure between the wire and the terminal, and there will be impedance on the contact surface. When the pressure is small, the impedance is relatively high (or the lead wire is thin and the lead wire oxidation will also cause the same problem). High impedance will cause the terminal temperature to rise abnormally. To this end, this embodiment sets the main body temperature sensor 200 at the main circuit input terminal CN1 and the main circuit output terminal CN2. Specifically, the main body temperature sensor 200 can be set only on the main circuit input terminal CN1, or only on the main circuit output terminal CN2, or the main body temperature sensor 200 can be set on the main circuit input terminal CN1 and also on the main circuit output terminal CN2. The main body temperature sensor 200 can detect the temperature at the main circuit input terminal CN1 and the main circuit output terminal CN2, and the ambient temperature sensor 300 can be set outside the housing of the intelligent circuit breaker to detect the temperature of the current environment in real time. The control circuit 400 can determine whether the temperature rise at the terminal exceeds the set safety alarm threshold value based on whether the signal at the output end of the comparator 410 is flipped, thereby realizing the temperature detected by the main temperature sensor 200 and the ambient temperature sensor 300. When it is detected that the temperature exceeds the alarm threshold value, that is, when the comparator outputs a circuit breaker trigger signal, the control switch component 110 disconnects the electrical connection between the main circuit input terminal CN1 and the main circuit output terminal CN2 to disconnect the main circuit and realize self-protection of the circuit breaker.

[0057] The utility model can detect the temperature at the main circuit input terminal CN1 and the main circuit output terminal CN2 through the main body temperature sensor 200, and the ambient temperature sensor 300 detects the temperature of the current environment in real time, and outputs the detected temperature signal to the control circuit 400, so that the control circuit 400 controls the switch component 110 to connect or disconnect the electrical connection between the main circuit input terminal CN1 and the main circuit output terminal CN2 according to the main body temperature signal and the ambient temperature signal. The utility model is conducive to improving the safety and reliability of the intelligent circuit breaker.

[0058] In one embodiment, the number of the main body temperature sensors 200 is at least two, and the at least two main body temperature sensors 200 are respectively disposed at the main circuit input terminal CN1 and the main circuit output terminal CN2.

[0059] In this embodiment, the number of the main body temperature sensor 200 can be one or two. When it is set to one, it can be set on the main circuit input terminal CN1 or the main circuit output terminal CN2. When it is set to two, the two main body temperature sensors 200 are respectively set on the main circuit input terminal CN1 and the main circuit output terminal CN2. The two main body temperature sensors 200 can detect the temperature at the main circuit input terminal CN1 and the main circuit output terminal CN2 respectively. The control circuit 400 can determine whether the temperature rise at the main circuit input terminal CN1 and the main circuit output terminal CN2 exceeds the set safety alarm threshold according to the temperature detected by the two main body temperature sensors 200 and the ambient temperature sensor 300. When it is detected that the temperature rise at the main circuit input terminal CN1 and / or the main circuit output terminal CN2 exceeds the alarm threshold, the control switch component 110 is connected to the electrical connection between the main circuit input terminal CN1 and the main circuit output terminal CN2 to disconnect the main circuit and realize self-protection of the circuit breaker.

[0060] In one embodiment, the intelligent circuit breaker further includes:

[0061] A current sensor 500 is disposed in the circuit breaker body 100, and is used to detect the current value in the main circuit and output a corresponding current detection signal;

[0062] The control circuit 400 is also connected to the current sensor 500, and is also used to control the switch component 110 to connect or disconnect the electrical connection between the main circuit input terminal CN1 and the main circuit output terminal CN2 according to the current detection signal, the main body temperature signal and the ambient temperature signal.

[0063] In this embodiment, the current sensor 500 can be implemented by a current transformer, and an induction coil can be set in the current transformer. When current flows through the main circuit, the current transformer will generate an induced current of corresponding magnitude according to the ratio of the number of turns of the two coils, thereby realizing the collection of the current signal flowing through the main circuit. The current transformer can output the generated induced current directly or after corresponding current conversion as a current detection signal. The terminal temperature rise can be judged in advance based on the current of the current main circuit and the current judgment of the current main circuit. The terminal abnormality can be judged in advance when the terminal temperature rise has not reached the dangerous value. The intelligent circuit breaker can estimate the temperature rise range under the current under the current under the current ambient temperature according to the standard impedance of the terminal according to the ambient temperature and the main circuit current. When the temperature rise exceeds the estimated range, it can be judged that the terminal is in an abnormal state and an alarm is issued. The optional disconnection of the main circuit reminds the user to check the terminal condition. At this time, the temperature rise may not exceed the absolute value alarm threshold range, which is an advance prediction behavior.

[0064] In one embodiment, the intelligent circuit breaker further includes:

[0065] An indicator light, arranged on the circuit breaker body 100, and connected to the control circuit 400;

[0066] The control circuit 400 is further used to control the indicator light to work according to the current detection signal, the main body temperature signal and the ambient temperature signal, so as to issue corresponding indication information.

[0067] In this embodiment, the indicator light can be implemented by using LED lights of different colors, or by using LED lights that emit different colors, and different colors of LED lights are emitted according to the working state of the intelligent circuit breaker. For example, in normal operation, a green light is emitted, and when the temperature rise value at the main circuit input terminal CN1 and / or the main circuit output terminal CN2 exceeds the set safety alarm threshold, a red light is emitted. Under the current ambient temperature, the temperature rise range under the current, when the temperature rise exceeds the estimated range, it can be judged that the terminal is in an abnormal state and a yellow light is emitted.

[0068] In one embodiment, the intelligent circuit breaker further includes:

[0069] The communication module 600 is disposed in the circuit breaker body 100 and is connected to the control circuit 400. The communication module 600 is used to encode the signal output by the control circuit 400 and upload it to an Internet terminal so that the Internet terminal can perform safety management on the intelligent circuit breaker.

[0070] In this embodiment, the communication module 600 can be a wired communication module, such as: RS485 communication interface or RS232 communication interface, etc.; the communication module 600 can also be a wireless communication module, such as: at least one of WIFI module, Bluetooth module, LoRa module, ZigBee module, 2G module, 3G module, 4G module or 5G module, etc. By setting the communication module 600 to establish a communication connection with the Internet terminal, the voltage signal, current signal and temperature signal of the circuit breaker are detected according to the current sensor 500, the temperature sensor, the voltage detection circuit, etc. and output to the control circuit 400, so that the control circuit 400 sends the voltage signal and the current signal to the Internet terminal through the communication module 600, and the intelligent circuit breaker interacts with the Internet terminal, so that the user or maintenance personnel can timely understand the operating status, energy consumption and safety of the main power circuit of the low-voltage circuit breaker. In addition, the network command can be received to enable the control circuit to control the switch component to realize the main circuit on and off, which is convenient for maintenance and repair and improves the safety of electricity use.

[0071] In one embodiment, the intelligent circuit breaker further includes:

[0072] A memory 700, connected to the control circuit, and used to store the temperature rise value at the main circuit input terminal CN1 and / or the main circuit output terminal CN2;

[0073] The control circuit is used to control the switch component 110 to connect / disconnect the electrical connection between the main circuit input terminal CN1 and the main circuit output terminal CN2 according to the plurality of stored temperature rise values, and output a detection reminder signal.

[0074] The memory 700 can store the temperature rise value of the intelligent circuit breaker when it is working. The control circuit can also estimate the line loss according to the normal temperature rise situation, and remind the user to check the line in time through long-term accumulation to prevent electrical hazards caused by line aging due to oxidation, partial disconnection, moisture corrosion, etc.

[0075] The utility model also proposes an intelligent circuit breaker control system, including an Internet terminal and the intelligent circuit breaker as described above; the detailed structure of the intelligent circuit breaker can refer to the above embodiment, which will not be repeated here; it can be understood that since the above intelligent circuit breaker is used in the intelligent circuit breaker control system of the utility model, the embodiment of the intelligent circuit breaker control system of the utility model includes all technical solutions of all embodiments of the above intelligent circuit breaker, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0076] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An intelligent circuit breaker, characterized in that: The intelligent circuit breaker comprises: The circuit breaker body has a main circuit input terminal, a main circuit output terminal and a switch assembly. The main circuit input terminal, the switch assembly and the main circuit output terminal are connected to form a main circuit. The switch assembly is used to control the connection or disconnection between the main circuit input terminal and the main circuit output terminal; a main body temperature sensor, arranged at the main circuit input terminal and / or the main circuit output terminal, the main body temperature sensor being used to detect the temperature of the main circuit input terminal and / or the main circuit output terminal and output a main body temperature signal; An ambient temperature sensor is arranged on the circuit breaker body, and is used to detect ambient temperature and ambient temperature signal; Circuit control board; A subtractor, wherein two input ends of the subtractor are respectively connected to the main body temperature sensor and the ambient temperature sensor, and the subtractor is used to calculate the temperature rise value at the main circuit input terminal and / or the main circuit output terminal according to the main body temperature signal and the ambient temperature signal; A comparator, one input end of the comparator is connected to the subtractor, and the other input end of the comparator is connected to the subtractor; when it is detected that the temperature rise value at the main circuit input terminal and / or the main circuit output terminal calculated by the ambient temperature signal exceeds the set safety alarm threshold, a circuit breaking trigger signal is output; A control circuit is arranged on the circuit control board, and the control circuit is electrically connected to the output end of the comparator and the controlled end of the switch component respectively; the control circuit is used to control the switch component to disconnect the electrical connection between the main circuit input terminal and the main circuit output terminal according to the output circuit breaking trigger signal.

2. The intelligent circuit breaker according to claim 1, characterized in that: The number of the main body temperature sensors is at least two, and the at least two main body temperature sensors are respectively arranged at the main circuit input terminal and the main circuit output terminal.

3. The intelligent circuit breaker according to claim 1, characterized in that: The intelligent circuit breaker also includes: A current sensor is disposed in the circuit breaker body, and is used to detect the current value in the main circuit and output a corresponding current detection signal; The control circuit is also connected to the current sensor, and is also used to control the switch component to connect or disconnect the electrical connection between the main circuit input terminal and the main circuit output terminal according to the current detection signal, the main body temperature signal and the ambient temperature signal.

4. The intelligent circuit breaker according to claim 3, characterized in that: The intelligent circuit breaker also includes: An indicator light, arranged on the circuit breaker body, the indicator light being connected to the control circuit; The control circuit is also used to control the indicator light to work according to the current detection signal, the main body temperature signal and the ambient temperature signal, so as to issue corresponding indication information.

5. The intelligent circuit breaker according to claim 1, characterized in that: The intelligent circuit breaker also includes: A communication module is arranged on the circuit breaker body, the communication module is connected to the control circuit, and is used to encode the signal output by the control circuit and upload it to an Internet terminal so that the Internet terminal can perform safety management on the intelligent circuit breaker.

6. The intelligent circuit breaker according to claim 1, characterized in that: The intelligent circuit breaker also includes: A memory connected to the control circuit, the memory being used to store the temperature rise value at the main circuit input terminal and / or the main circuit output terminal; The control circuit is used to control the switch component to connect / disconnect the electrical connection between the main circuit input terminal and the main circuit output terminal according to the multiple stored temperature rise values, and output a detection reminder signal.

7. An intelligent circuit breaker control system, characterized in that: Comprising the intelligent circuit breaker as described in any one of claims 1 to 6.

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