Power distribution terminal temperature detection circuit and device

Abstract

The utility model relates to the technical field of power distribution terminal temperature detection, in particular to a power distribution terminal temperature detection circuit and device. The thermal detection component is used for detecting the environment temperature, and the output end of the thermal detection component is connected with the input end of the A / D digital-to-analog conversion circuit; the output end of the A / D digital-to-analog conversion circuit is connected with the input end of the master control module, and the output end of the master control module is connected with the cooling module, the heating module and the remote signaling interface of the power distribution terminal. The thermal detection component is used for detecting the environment temperature and outputting an analog temperature signal; the A / D conversion circuit is used for converting an analog temperature signal output by the thermal detection component into a digital temperature signal; the main control module receives the digital temperature signal output by the A / D digital-to-analog conversion circuit, judges whether the temperature exceeds a normal range or not, and controls the relay module to act; the relay module is used for controlling start and stop of the cooling module and the heating module.

Description

Technical Field

[0001] This utility model relates to the field of power distribution terminal temperature detection technology, and in particular to a power distribution terminal temperature detection circuit and device. Background Technology

[0002] With the rapid development of smart grids and distribution automation technologies, distribution terminals, as a key component of the power system, undertake important functions such as data acquisition, control execution, and communication transmission. Their stability and reliability are directly related to the safe operation of the entire power grid. However, in existing technologies, distribution terminals generally lack the ability to effectively monitor the ambient temperature around the equipment. Ambient temperature is one of the key factors affecting the performance and lifespan of electronic equipment. Extreme high or low temperatures can lead to problems such as performance degradation of internal components, increased thermal stress, and accelerated aging of insulation materials in distribution terminals, thereby causing equipment failure, malfunction, or even damage, seriously affecting the reliability and security of the power grid.

[0003] Specifically, when a power distribution terminal is in a high-temperature environment, its internal electronic components may overheat due to poor heat dissipation, leading to performance degradation, shortened lifespan, or even direct burnout. Conversely, in low-temperature environments, phenomena such as grease solidification, battery performance degradation, and material embrittlement may hinder the normal startup and operation of the equipment. Due to the lack of ambient temperature monitoring, maintenance personnel cannot obtain timely temperature information about the environment in which the equipment is located, making it impossible to take preventative measures in advance, such as adjusting equipment operating parameters, improving heat dissipation conditions, or performing necessary maintenance. This increases the risk of equipment failure and maintenance costs.

[0004] Therefore, developing a technical solution that can monitor the ambient temperature around the power distribution terminal in real time and automatically adjust the equipment's operating status or issue early warnings based on temperature changes is of great significance for improving the adaptability and reliability of the power distribution terminal and ensuring the safe and stable operation of the power grid. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a power distribution terminal temperature detection circuit and device.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] In the first aspect, a temperature detection circuit for a power distribution terminal is provided, including thermal detection components, an A / D digital-to-analog conversion circuit, a main control module, a relay module, a cooling module, and a heating module;

[0008] The thermal detection component is used to detect the ambient temperature. The output terminal of the thermal detection component is connected to the input terminal of the A / D digital-to-analog conversion circuit. The output terminal of the A / D digital-to-analog conversion circuit is connected to the input terminal of the main control module. The output terminal of the main control module is connected to the remote signaling interface of the cooling module, the heating module, and the power distribution terminal, respectively.

[0009] The thermal detection component is used to detect the ambient temperature and output an analog temperature signal; the A / D digital-to-analog converter circuit is used to convert the analog temperature signal output by the thermal detection component into a digital temperature signal; the main control module receives the digital temperature signal output by the A / D digital-to-analog converter circuit, determines whether the temperature exceeds the normal range, and controls the relay module to operate; the relay module is used to control the start and stop of the cooling module and the heating module.

[0010] Compared with the prior art, the present invention has the following technical effects:

[0011] When the power distribution terminal is working, the thermal detection component automatically detects the ambient temperature and transmits the temperature signal to the A / D digital-to-analog converter module. The A / D digital-to-analog converter module converts the analog signal into a digital signal and transmits it to the main chip. If the temperature exceeds the preset value, the main chip starts the fan or heating resistor through a relay to adjust the ambient temperature of the power distribution terminal. At the same time, the main chip transmits the entire process information to the power distribution terminal, and the power distribution terminal generates log information to record and store it.

[0012] Furthermore, the A / D digital-to-analog conversion circuit includes an A / D conversion chip, and the main control module includes a main chip; the first pin of the thermal detection component is connected to one end of the fourth resistor and the fourth pin of the A / D conversion chip, and the other end of the fourth resistor is connected to a first voltage; the second pin of the thermal detection component is grounded; the third pin of the A / D conversion chip is connected to the first pin of the main chip, the first pin of the A / D conversion chip is connected to the first voltage, and the second pin of the A / D conversion chip is grounded.

[0013] Furthermore, the relay module includes a cooling control circuit, a heating control circuit, and a remote signaling control circuit; wherein, the cooling control circuit is used to cool down the power distribution terminal, the heating control circuit is used to heat up the power distribution terminal, and the remote signaling control circuit is used to input the heating and cooling processes to the power distribution terminal via remote signaling.

[0014] Furthermore, the cooling control circuit includes a first resistor, a second resistor, a third resistor, a sixth resistor, a first relay, a first optocoupler, and a second optocoupler; one end of the second resistor is connected to the eighth pin of the main chip, the other end of the second resistor is connected to the anode of the first optocoupler, the cathode of the first optocoupler is grounded, the collector of the first optocoupler is connected to one end of the first resistor and the second pin of the first relay, the other end of the first resistor is connected to a first voltage, and the emitter of the first optocoupler is grounded;

[0015] One end of the third resistor is connected to the ninth pin of the main chip, the other end of the third resistor is connected to the anode of the second optocoupler, the cathode of the second optocoupler is grounded, the collector of the second optocoupler is connected to the first voltage, the emitter of the sixth resistor is connected to one end of the sixth resistor and the first pin of the first relay, and the other end of the sixth resistor is connected to the first voltage.

[0016] The third and fourth pins of the first relay are connected to the first terminal, and the outer end of the first terminal is connected to the cooling module.

[0017] Furthermore, the temperature control circuit includes an eighth resistor, a seventh resistor, a ninth resistor, a tenth resistor, a second relay, a third optocoupler, and a fourth optocoupler; one end of the seventh resistor is connected to the thirteenth pin of the main chip, the other end of the seventh resistor is connected to the anode of the third optocoupler, the cathode of the third optocoupler is grounded, the collector of the third optocoupler is connected to one end of the eighth resistor and the second pin of the second relay, the other end of the eighth resistor is connected to the first voltage, and the emitter of the third optocoupler is grounded;

[0018] One end of the ninth resistor is connected to the fourteenth pin of the main chip, the other end of the ninth resistor is connected to the anode of the fourth optocoupler, the cathode of the fourth optocoupler is grounded, the collector of the fourth optocoupler is connected to the first voltage, the emitter of the tenth resistor is connected to one end of the tenth resistor and the first pin of the second relay, and the other end of the tenth resistor is connected to the first voltage.

[0019] The third and fourth pins of the second relay are connected to the second terminal, and the outer end of the second terminal is connected to the heating module.

[0020] Furthermore, the remote signaling control circuit includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a third relay, a fifth relay, and a sixth relay; one end of the twelfth resistor is connected to the eighteenth pin of the main chip, the other end of the twelfth resistor is connected to the anode of the fifth relay, the cathode of the fifth relay is grounded, the collector of the fifth relay is connected to one end of the eleventh resistor and the second pin of the third relay, the other end of the eleventh resistor is connected to a first voltage, and the emitter of the fifth relay is grounded;

[0021] One end of the thirteenth resistor is connected to the seventeenth pin of the main chip, the other end of the thirteenth resistor is connected to the anode of the sixth relay, the cathode of the sixth relay is grounded, the collector of the sixth relay is connected to the first voltage, the emitter of the fourteenth resistor is connected to one end of the fourteenth resistor and the first pin of the third relay, and the other end of the fourteenth resistor is connected to the first voltage.

[0022] The third and fourth pins of the third relay are connected to the second terminal, and the outer end of the second terminal is connected to the remote signaling interface of the power distribution terminal.

[0023] Furthermore, the cooling module is a fan, and the heating module is a heating resistor.

[0024] Furthermore, it also includes a power module for providing a first voltage.

[0025] Furthermore, the power module includes a power terminal and a power conversion module. The power terminal is connected to the power supply voltage, the first pin of the power terminal is connected to the first pin of the power conversion module, and the third pin of the power conversion module outputs a first voltage. The second pin of the power terminal, the second pin of the power conversion module, and the fourth pin of the power conversion module are grounded.

[0026] In a second aspect, a power distribution terminal temperature detection device is provided, including the power distribution terminal temperature detection circuit described in the first aspect, and also including a housing and a PCB board, wherein the power distribution terminal temperature detection circuit is disposed on the PCB board; the PCB board is installed inside the housing, and the housing is provided with a terminal interface and a power interface.

[0027] In summary, compared with the prior art, the present invention has the following technical effects:

[0028] This utility model discloses a power distribution terminal temperature detection device, which can detect changes in the ambient temperature around the power distribution terminal in a timely manner, ensuring that the power distribution terminal can work normally in a normal temperature environment. Attached Figure Description

[0029] Figure 1 This is a circuit diagram of the power distribution terminal temperature detection circuit of this utility model. Detailed Implementation

[0030] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0031] Reference Figure 1A temperature detection circuit for a power distribution terminal includes a thermal detection component, an A / D digital-to-analog converter circuit, a main control module, a relay module, a cooling module, and a heating module. The thermal detection component is used to detect the ambient temperature, and its output terminal is connected to the input terminal of the A / D digital-to-analog converter circuit. The output terminal of the A / D digital-to-analog converter circuit is connected to the input terminal of the main control module, and the output terminal of the main control module is connected to the cooling module, the heating module, and the remote signaling interface of the power distribution terminal.

[0032] The thermal detection component is used to detect the ambient temperature and output an analog temperature signal; the A / D digital-to-analog converter circuit is used to convert the analog temperature signal output by the thermal detection component into a digital temperature signal; the main control module is used to receive the digital temperature signal output by the A / D digital-to-analog converter circuit, determine whether the temperature exceeds the normal range, and control the relay module to operate; the relay module is used to control the start and stop of the cooling module and the heating module.

[0033] In this embodiment, the A / D digital-to-analog conversion circuit includes an A / D conversion chip D1, and the main control module includes a main chip D2. The first pin of the thermal detection component is connected to one end of a fourth resistor R4 and the fourth pin of the A / D conversion chip D1, and the other end of the fourth resistor R4 is connected to a first voltage. The second pin of the thermal detection component is grounded. The third pin of the A / D conversion chip D1 is connected to the first pin of the main chip D2, the first pin of the A / D conversion chip D1 is connected to the first voltage, and the second pin of the A / D conversion chip D1 is grounded. The thermal detection component R5 is a TMP6131, the A / D conversion chip D1 is a CL1616, and the main chip D2 is a Texas Instruments MSP430F5659IPZ.

[0034] The resistance value changes with temperature. As the temperature rises, the resistance of the thermal detection component R5 increases; as the temperature decreases, the resistance of R5 decreases. The fourth resistor R4 has a resistance of 10KΩ. The thermal detection component R5 and the fourth resistor R4 divide the first voltage (3.3V), and the divided voltage is connected to the fourth pin of the A / D converter chip D1. The A / D converter chip D1 converts the acquired voltage signal into a digital signal, and then sends the digital signal to the main chip D2 through its third pin.

[0035] The main chip D2 determines the operating temperature. When the temperature exceeds 70℃, the resistance of the thermal detection component R5 is higher than 13K, and when the temperature is lower than -40℃, the resistance of the thermal detection component R5 is lower than 7K. The voltage value (U) determined by the main chip D2 depends on the voltage division value of the thermal detection component R5 and the fourth resistor R4. The reference formula is: U = 3.3 * R5 / (R4 + R5).

[0036] In this embodiment, the relay module includes a cooling control circuit, a heating control circuit, and a remote signaling control circuit; wherein, the cooling control circuit is used to cool down the power distribution terminal, the heating control circuit is used to heat up the power distribution terminal, and the remote signaling control circuit is used to input the heating and cooling processes to the power distribution terminal via remote signaling.

[0037] The cooling control circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a sixth resistor R6, a first relay J1, a first optocoupler E1, and a second optocoupler E2; one end of the second resistor R2 is connected to the eighth pin of the main chip D2, the other end of the second resistor R2 is connected to the anode of the first optocoupler E1, the cathode of the first optocoupler E1 is grounded, the collector of the first optocoupler E1 is connected to one end of the first resistor R1 and the second pin of the first relay, the other end of the first resistor R1 is connected to a first voltage, and the emitter of the first optocoupler E1 is grounded;

[0038] One end of the third resistor R3 is connected to the ninth pin of the main chip D2, the other end of the third resistor R3 is connected to the anode of the second optocoupler E2, the cathode of the second optocoupler E2 is grounded, the collector of the second optocoupler E2 is connected to the first voltage, the emitter of the sixth resistor R6 is connected to one end of the sixth resistor R6 and the first pin of the first relay J1, and the other end of the sixth resistor R6 is connected to the first voltage.

[0039] The third and fourth pins of the first relay J1 are connected to the first terminal, and the external end of the first terminal is connected to the fan power supply. It is worth noting that the first relay J1 is a Chint JR36-20.

[0040] When the voltage signal U output by the A / D converter chip D1 to the main chip D2 is higher than 3.3V*13K / (13K+10K) = 1.86V, the main chip D2 controls pin 8 I0 to go high. Current flows into the front stage of the first optocoupler E1, turning it on. The collector voltage of the first optocoupler E1 changes from 3.3V to 0V, and the second pin of the first relay J1 is 0V. Similarly, when the main chip D2 controls pin 9 I0 to go high, current flows into the front stage of the second optocoupler E2, turning it on. The emitter voltage of the second optocoupler E2 changes from 0V to 3.3V, and the first pin of the first relay J1 is 3.3V.

[0041] Through the above operations, the first optocoupler E1 and the second optocoupler E2 control the first relay J1 to conduct, and the first relay J1 receives a 3.3V voltage, thereby the first terminal (XS1) receives a 3.3V conduction. The external end of the first terminal (XS1) is connected to the fan power supply, which is a Chint axial flow fan 120*120*38 220V. When the first terminal (XS1) is conducting, the fan starts and begins to cool the distribution box.

[0042] In a specific embodiment, the temperature control circuit includes an eighth resistor R8, a seventh resistor R7, a ninth resistor R9, a tenth resistor R10, a second relay J2, a third optocoupler E3, and a fourth optocoupler E4; one end of the seventh resistor R7 is connected to the thirteenth pin of the main chip D2, the other end of the seventh resistor R7 is connected to the anode of the third optocoupler E3, the cathode of the third optocoupler E3 is grounded, the collector of the third optocoupler E3 is connected to one end of the eighth resistor R8 and the second pin of the second relay J2, the other end of the eighth resistor R8 is connected to a first voltage, and the emitter of the third optocoupler E3 is grounded;

[0043] One end of the ninth resistor R9 is connected to the fourteenth pin of the main chip D2, the other end of the ninth resistor R9 is connected to the anode of the fourth optocoupler E4, the cathode of the fourth optocoupler E4 is grounded, the collector of the fourth optocoupler E4 is connected to the first voltage, the emitter of the tenth resistor R10 is connected to one end of the tenth resistor R10 and the first pin of the second relay J2, and the other end of the tenth resistor R10 is connected to the first voltage.

[0044] The third and fourth pins of the second relay J2 are connected to the second terminal, and the outer end of the second terminal is connected to a heating resistor. It is worth noting that the second relay J2 is a Chint JR36-20, and the heating resistor is a Haier HNF-200A220V.

[0045] When the voltage signal U output by A / D converter chip D1 to main chip D2 is lower than 3.3V*7K / (7K+10K) = 1.36V, main chip D2 controls pin 13 I0 to go high. Current flows into the front stage of third optocoupler E3, turning it on. The collector voltage of third optocoupler E3 changes from 3.3V to 0V, and pin 2 of second relay J2 is 0V. Similarly, main chip D2 controls pin 14 I0 to go high. Current flows into the front stage of fourth optocoupler E4, turning it on. The emitter voltage of fourth optocoupler E4 changes from 0V to 3.3V, and pin 1 of second relay J2 is 3.3V.

[0046] Through the above operations, the third optocoupler E3 and the fourth optocoupler E4 control the second relay J2 to conduct, and the second relay J2 receives a 3.3V voltage, thereby the second terminal (XS2) receives a 3.3V conduction. The external end of the second terminal (XS2) is connected to a heating resistor, model: Haier HNF-200A 220V. When the second terminal (XS2) is conducting, the heating resistor starts and begins to heat up the distribution box.

[0047] In a specific embodiment, the remote signaling control circuit includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a third relay J3, a fifth relay J5, and a sixth relay J6; one end of the twelfth resistor R12 is connected to the eighteenth pin of the main chip D2, the other end of the twelfth resistor R12 is connected to the anode of the fifth relay J5, the cathode of the fifth relay J5 is grounded, the collector of the fifth relay J5 is connected to one end of the eleventh resistor R11 and the second pin of the third relay J3, the other end of the eleventh resistor R11 is connected to a first voltage, and the emitter of the fifth relay J5 is grounded;

[0048] One end of the thirteenth resistor R13 is connected to the seventeenth pin of the main chip D2, and the other end of the thirteenth resistor R13 is connected to the anode of the sixth relay J6. The cathode of the sixth relay J6 is grounded, and the collector of the sixth relay J6 is connected to the first voltage. The emitter of the fourteenth resistor R14 is connected to one end of the fourteenth resistor R14 and the first pin of the third relay J3, and the other end of the fourteenth resistor R14 is connected to the first voltage.

[0049] The third and fourth pins of the third relay J3 are connected to the second terminal, and the outer end of the second terminal is connected to the remote signaling interface of the power distribution terminal. It is worth noting that the third relay J3 is an SRD-03VDC-SL-C model from Ningbo Songle Relay Co., Ltd.

[0050] The third terminal (XS4) is connected to the remote signaling interface of the power distribution terminal. It operates on the same principle as the heating and cooling conduction. When the main chip D2 starts the heating or cooling program, it controls the seventeenth and eighteenth pins to activate the fifth optocoupler E5 and the sixth optocoupler E6 to conduct the third relay J3, thereby turning on the third terminal. The heating and cooling process is then input to the power distribution terminal via remote signaling. The power distribution terminal receives the remote signaling signal and effectively stores the data in the daily log.

[0051] Based on the above principles, the ambient temperature inside the distribution box can be effectively controlled within the normal operating temperature range, ensuring the normal operation of the distribution terminal. Simultaneously, the temperature detection device employs the working principle of dual optocoupler control relays, effectively isolating two layers of interference from the relay contacts. The relay isolates one layer of interference, and the dual optocouplers isolate another layer. This dual isolation by the relays and dual optocouplers effectively ensures the normal operation of the main chip D2, further improving the operational quality of the temperature detection device. This further guarantees that the distribution terminal operates within the normal temperature range, greatly reducing various problems caused by excessively high or low temperatures.

[0052] In this embodiment, a power supply module is also included, which provides a first voltage. The power supply module includes a power terminal and a power conversion module D3. The power terminal is connected to 24V, and its first pin is connected to the first pin of the power conversion module D3. The third pin of the power conversion module D3 outputs the first voltage. The second pin of the power terminal, the second pin of the power conversion module D3, and the fourth pin of the power conversion module D3 are grounded. The power conversion module D3 is model URB3403YMD-6WR3.

[0053] The power supply used by the internal module of the power distribution terminal is 24V. The 24V power supply is connected to the power terminal XS3. The power terminal XS3 sends the 24V power + to the power conversion module D3 through the first pin. The power conversion module D3 converts the 24V power supply to 3.3V to power the temperature detection device.

[0054] Another embodiment of this utility model provides a power distribution terminal temperature detection device, including a housing and a PCB board. The power distribution terminal temperature detection circuit is disposed on the PCB board. The PCB board is installed inside the housing and is connected to a fan and a heating resistor through a terminal interface. The housing, fan, and heating resistor are integrally mounted on the power distribution terminal cabinet.

[0055] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature detection circuit for a power distribution terminal, characterized in that, It includes thermal detection components, A / D digital-to-analog conversion circuit, main control module, relay module, cooling module and heating module; The thermal detection component is used to detect the ambient temperature. The output terminal of the thermal detection component is connected to the input terminal of the A / D digital-to-analog conversion circuit. The output terminal of the A / D digital-to-analog conversion circuit is connected to the input terminal of the main control module. The output terminal of the main control module is connected to the remote signaling interface of the cooling module, the heating module, and the power distribution terminal, respectively.

2. The temperature detection circuit for a power distribution terminal according to claim 1, characterized in that, The A / D digital-to-analog conversion circuit includes an A / D conversion chip, and the main control module includes a main chip; the first pin of the thermal detection component is connected to one end of a fourth resistor and the fourth pin of the A / D conversion chip, and the other end of the fourth resistor is connected to a first voltage; the second pin of the thermal detection component is grounded; the third pin of the A / D conversion chip is connected to the first pin of the main chip, the first pin of the A / D conversion chip is connected to the first voltage, and the second pin of the A / D conversion chip is grounded.

3. The temperature detection circuit for a power distribution terminal according to claim 2, characterized in that, The relay module includes a cooling control circuit, a heating control circuit, and a remote signaling control circuit; wherein, the cooling control circuit is used to cool down the power distribution terminal, the heating control circuit is used to heat up the power distribution terminal, and the remote signaling control circuit is used to input the heating and cooling processes to the power distribution terminal via remote signaling.

4. The temperature detection circuit for a power distribution terminal according to claim 3, characterized in that, The cooling control circuit includes a first resistor, a second resistor, a third resistor, a sixth resistor, a first relay, a first optocoupler, and a second optocoupler; one end of the second resistor is connected to the eighth pin of the main chip, the other end of the second resistor is connected to the anode of the first optocoupler, the cathode of the first optocoupler is grounded, the collector of the first optocoupler is connected to one end of the first resistor and the second pin of the first relay, the other end of the first resistor is connected to a first voltage, and the emitter of the first optocoupler is grounded. One end of the third resistor is connected to the ninth pin of the main chip, the other end of the third resistor is connected to the anode of the second optocoupler, the cathode of the second optocoupler is grounded, the collector of the second optocoupler is connected to the first voltage, the emitter of the sixth resistor is connected to one end of the sixth resistor and the first pin of the first relay, and the other end of the sixth resistor is connected to the first voltage. The third and fourth pins of the first relay are connected to the first terminal, and the outer end of the first terminal is connected to the cooling module.

5. The temperature detection circuit for a power distribution terminal according to claim 3, characterized in that, The temperature control circuit includes an eighth resistor, a seventh resistor, a ninth resistor, a tenth resistor, a second relay, a third optocoupler, and a fourth optocoupler; one end of the seventh resistor is connected to the thirteenth pin of the main chip, the other end of the seventh resistor is connected to the anode of the third optocoupler, the cathode of the third optocoupler is grounded, the collector of the third optocoupler is connected to one end of the eighth resistor and the second pin of the second relay, the other end of the eighth resistor is connected to the first voltage, and the emitter of the third optocoupler is grounded; One end of the ninth resistor is connected to the fourteenth pin of the main chip, the other end of the ninth resistor is connected to the anode of the fourth optocoupler, the cathode of the fourth optocoupler is grounded, the collector of the fourth optocoupler is connected to the first voltage, the emitter of the tenth resistor is connected to one end of the tenth resistor and the first pin of the second relay, and the other end of the tenth resistor is connected to the first voltage. The third and fourth pins of the second relay are connected to the second terminal, and the outer end of the second terminal is connected to the heating module.

6. The temperature detection circuit for a power distribution terminal according to claim 3, characterized in that, The remote signaling control circuit includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a third relay, a fifth relay, and a sixth relay; one end of the twelfth resistor is connected to the eighteenth pin of the main chip, the other end of the twelfth resistor is connected to the anode of the fifth relay, the cathode of the fifth relay is grounded, the collector of the fifth relay is connected to one end of the eleventh resistor and the second pin of the third relay, the other end of the eleventh resistor is connected to a first voltage, and the emitter of the fifth relay is grounded; One end of the thirteenth resistor is connected to the seventeenth pin of the main chip, the other end of the thirteenth resistor is connected to the anode of the sixth relay, the cathode of the sixth relay is grounded, the collector of the sixth relay is connected to the first voltage, the emitter of the fourteenth resistor is connected to one end of the fourteenth resistor and the first pin of the third relay, and the other end of the fourteenth resistor is connected to the first voltage. The third and fourth pins of the third relay are connected to the second terminal, and the outer end of the second terminal is connected to the remote signaling interface of the power distribution terminal.

7. The temperature detection circuit for a power distribution terminal according to claim 1, characterized in that, The cooling module is a fan, and the heating module is a heating resistor.

8. The temperature detection circuit for a power distribution terminal according to claim 1, characterized in that, It also includes a power module for providing a first voltage.

9. A power distribution terminal temperature detection circuit according to claim 8, characterized in that, The power module includes a power terminal and a power conversion module. The power terminal is connected to the power supply voltage. The first pin of the power terminal is connected to the first pin of the power conversion module. The third pin of the power conversion module outputs a first voltage. The second pin of the power terminal, the second pin of the power conversion module, and the fourth pin of the power conversion module are grounded.

10. A power distribution terminal temperature detection device, comprising the power distribution terminal temperature detection circuit according to any one of claims 1-9, further comprising a housing and a PCB board, wherein the power distribution terminal temperature detection circuit is disposed on the PCB board; the PCB board is installed inside the housing, and the housing is provided with a terminal interface and a power interface.

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