Intelligent heat dissipation system of outgoing line cabinet

Abstract

The invention relates to the technical field of electric cabinets, in particular to an intelligent heat dissipation system of an outgoing line cabinet, which comprises an electric cabinet body, a partition plate, a temperature adjusting assembly, a first temperature sensor and a control assembly, and is characterized in that the partition plate is arranged in the electric cabinet body and divides the electric cabinet body into a working cavity and a heat exchange cavity; the first temperature sensor is arranged in the working cavity and used for detecting the temperature of the electrical element, the temperature adjusting assembly comprises a heat conduction fin, a circulating pump arranged outside the electric cabinet body and a temperature adjuster, the heat conduction fin is installed on the partition plate and penetrates through the working cavity and the heat exchange cavity, and the heat conduction fin is in heat conduction contact with the electrical element in the working cavity; the heat conduction fins are provided with liquid passing channels in the heat exchange cavity, the circulating pump is used for enabling heat conduction liquid to circularly flow between the liquid passing channels and the thermolator, and the circulating pump, the first temperature sensor, the thermolator and the electrical element are all in communication connection with the control assembly. According to the invention, the operation temperature of the electrical element is stabilized in the optimal temperature range.

Description

Technical Field

[0001] This application relates to the field of electrical cabinet technology, and in particular to an intelligent heat dissipation system for outgoing line cabinets. Background Technology

[0002] As a critical power distribution device in the power system, the outgoing switchgear integrates core electrical components such as circuit breakers, contactors, and frequency converters, which continuously generate a large amount of heat during operation, forming a complex thermal field. Existing heat dissipation technologies cannot achieve intelligent sensing and dynamic adjustment of the working chamber temperature, exhibiting fundamental flaws: natural ventilation relies entirely on passive convection, lacking any active adjustment capability, and its temperature is completely dependent on the external environment; forced air cooling, although equipped with fans, remains an open-loop control, unable to adjust airflow according to the actual component temperature, resulting in over-cooling under light loads and insufficient heat dissipation under heavy loads due to fixed airflow; traditional liquid cooling often operates at constant power, with circulating pumps and thermostats working at full load for extended periods, failing to adapt to dynamic load changes and causing significant energy waste. This "uncontrolled" or "blind cooling" operating mode allows the cabinet's internal temperature to fluctuate between 15°C and 80°C, completely deviating from the stringent requirements of electrical components for a constant temperature environment.

[0003] The optimal operating temperature for electrical components is generally above room temperature, typically 25-40℃. Within this range, material properties, mechanical efficiency, and electrical parameters achieve an optimal balance. Current technology, lacking intelligent temperature control, easily allows the cabinet temperature to remain consistently below 20℃ or above 70℃. When the temperature is too low, the viscosity of the circuit breaker lubricating oil surges, leading to increased power consumption during opening and closing. The contactor's electromagnetic attraction decreases, and the contact oxide film thickens, doubling the contact resistance. The sampling error and scan cycle of the PLC controller also deteriorate significantly. When the temperature exceeds the limit, the circuit breaker's tripping characteristics shift, the contactor's insulation life is halved for every 10℃ increase, and the IGBT module's lifespan decreases exponentially. Frequent temperature fluctuations can also cause mechanical stress damage such as solder joint cracking and loose wiring, increasing the failure rate by 3-5 times and shortening the service life by more than 50%.

[0004] Existing heat dissipation methods for outgoing line cabinets are prone to extreme states of either "overcooling" or "overheating." Natural ventilation with fixed vents and forced-air cooling with fixed-frequency fans can only provide constant heat dissipation. When the load decreases or the ambient temperature drops, the heat dissipation cannot be reduced, inevitably leading to overcooling; conversely, when the load increases, the instantaneous heat dissipation is insufficient, inevitably leading to overheating. Traditional liquid-cooled constant-power pumps and thermostats also cannot adjust their output according to the heat generated. Under light loads, continuous full-power cooling keeps the cabinet temperature far below the set value, while under heavy loads, the fixed cooling capacity cannot suppress temperature rise. This "all or nothing" operating mode causes the system to constantly oscillate between temperature extremes, resulting in low control accuracy (error exceeding 10℃) and an inability to stabilize within the optimal temperature range. Summary of the Invention

[0005] The purpose of this application is to provide an intelligent heat dissipation system for outgoing line cabinets, which aims to solve the problem that electrical components cannot operate stably within the optimal temperature range.

[0006] To address the aforementioned technical problems, this application provides an intelligent heat dissipation system for an outgoing line cabinet, comprising a cabinet body, a partition plate, a temperature regulating component, a first temperature sensor, and a control component. The partition plate is disposed within the cabinet body and divides the cabinet body into a working chamber and a heat exchange chamber. Electrical components are installed within the working chamber. The first temperature sensor is disposed within the working chamber and is used to detect the temperature of the electrical components. The temperature regulating component includes heat-conducting fins, a circulating pump disposed outside the cabinet body, and a thermostat. The heat-conducting fins are mounted on the partition plate and penetrate the working chamber and the heat exchange chamber. The heat-conducting fins are in thermal contact with the electrical components within the working chamber. The heat-conducting fins are provided with liquid channels within the heat exchange chamber. The circulating pump is used to circulate the heat-conducting liquid between the liquid channels and the thermostat. The circulating pump, the first temperature sensor, the thermostat, and the electrical components are all communicatively connected to the control component.

[0007] The intelligent heat dissipation system for outgoing line cabinets disclosed in this application utilizes the cooperation of the cabinet body, partition plate, temperature adjustment component, first temperature sensor, and control component to make the heat-conducting fins the primary heat exchange channel. Combined with sealing components to block air crosstalk, it forms a directional heat flow path of "sealed and insulated working chamber and forced heat exchange in heat exchange chamber". This shortens the response time for temperature adjustment and solves the problem that the heat dissipation treatment method of existing outgoing line cabinets is prone to causing the two extreme states of "overcooling" or "overheating". This ensures that the operating temperature of electrical components is stabilized within the optimal temperature range, thus extending their service life.

[0008] As an improvement to the above solution, the thermal conductivity of the heat-conducting fins is greater than that of the partition plate, so that heat is preferentially conducted quickly along the low thermal resistance heat dissipation fins to the heat exchange cavity and carried away by the heat-conducting liquid in the liquid channel, rather than diffused laterally to the partition plate through the high thermal resistance path.

[0009] As an improvement to the above solution, the heat-conducting fins are made of copper or copper alloy, and the partition plate is made of aluminum or aluminum alloy, ensuring that heat is conducted quickly with low thermal resistance, which satisfies the structural strength requirements while retaining appropriate thermal resistance to suppress lateral heat diffusion.

[0010] As an improvement to the above solution, a sealing element is provided at the connection between the heat-conducting fins and the partition plate. The sealing element is made of graphite sealing ring or flexible graphite gasket. The compression ratio of the sealing element is greater than 15% and the long-term temperature resistance is higher than 200℃, which ensures that it can fill the micro gaps without excessive crushing, and fully meets the thermal stability requirements of the heat dissipation cavity under high temperature conditions.

[0011] As an improvement to the above solution, a phase change material layer is embedded on the side of the partition plate facing the working chamber. The phase change material layer has a phase change temperature of 25-40℃ and a latent heat of phase change greater than 180J / g, which reduces the average annual operating load rate, improves the energy saving rate, and extends the equipment life.

[0012] As an improvement to the above solution, the phase change material layer is in direct contact with the base of the electrical components in the working cavity, avoiding the risk of local overheating caused by poor contact and ensuring the maximization of thermal shock suppression effect.

[0013] As an improvement to the above solution, the phase change material layer is embedded with a three-dimensional metal foam skeleton or encapsulated in microcapsules. The total thickness of the separator is greater than or equal to 20 mm and the embedding depth of the phase change material layer exceeds 50% of the thickness of the separator. This ensures the mechanical strength of the separator while providing sufficient phase change material capacity.

[0014] As an improvement to the above solution, the intelligent heat dissipation system for the outgoing line cabinet of this application also includes a fan installed on the upper part of the partition plate for drawing air from the working chamber to the heat exchange chamber. The working chamber is provided with an air inlet on the lower side, and the heat exchange chamber is provided with an air outlet on the lower side. The fan is communicatively connected to the control component, which improves the uniformity of the temperature field in the working chamber and enhances the reliability and completeness of the overall heat dissipation system.

[0015] As an improvement to the above solution, the intelligent heat dissipation system for the outgoing line cabinet of this application further includes a second temperature sensor disposed in the working chamber and used to detect the air temperature in the working chamber. The second temperature sensor is communicatively connected to the control component to supplement the solid thermal conductivity detection of the first temperature sensor.

[0016] As an improvement to the above solution, the intelligent heat dissipation system of the outgoing cabinet of this application also includes a third temperature sensor installed in the heat exchange chamber and located below the heat-conducting fins. The lower part of the partition plate is provided with a circulation port. The air inlet, air outlet and circulation port are all equipped with electric switching valves. The third temperature sensor and the three electric switching valves are all communicatively connected to the control component to improve the utilization rate of effective cooling capacity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the electrical cabinet body in the intelligent heat dissipation system of the outgoing cabinet according to an embodiment of this application, with the front door open. Figure 2 This is a schematic diagram of the internal structure of the electrical cabinet body in an embodiment of this application; Figure 3 for Figure 2 Enlarged view at point A in the middle; Figure 4 This is a schematic diagram of the temperature control component in an embodiment of this application; Figure 5This is a communication principle diagram of the control component in an embodiment of this application.

[0018] In the picture: 100. Electrical cabinet body; 110. Working chamber; 120. Heat exchange chamber; 130. Electrical components; 140. Air inlet; 150. Air outlet; 200. Separator; 210. Seal; 220. Phase change material layer; 230. Circulation port; 300. Temperature control assembly; 310. Heat-conducting fins; 320. Circulation pump; 330. Thermostat; 340. Liquid passage; 400. First temperature sensor; 500. Control components; 600. Fan; 700. Second temperature sensor; 800. Third temperature sensor; 900. Electric switch valve. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] like Figures 1 to 5 As shown in the figure, an intelligent heat dissipation system for a power supply cabinet in this application embodiment includes a cabinet body 100, a partition plate 200, a temperature control component 300, a first temperature sensor 400, and a control component 500. The partition plate 200 is disposed inside the cabinet body 100 and divides the cabinet body 100 into a working chamber 110 and a heat exchange chamber 120. In fact, the main body 100 of the electrical cabinet is a conventional outgoing cabinet, which can be made of cold-rolled steel plate by bending and welding, with electrostatic powder coating on the surface, which has good insulation and anti-corrosion performance. It is equipped with a front door, which is convenient to open to install or repair the internal components of the main body 100 of the electrical cabinet, while ensuring effective isolation between the working cavity 110 and the external environment during daily operation. The partition plate 200 is fixed in the main body 100 of the electrical cabinet by bolts, welding or tenon and mortise structure, etc., and divides the main body 100 of the electrical cabinet into the working cavity 110 and the heat exchange cavity 120. The volume of the working cavity 110 accounts for more than 70% of the total volume of the cabinet, providing a foundation for the installation of internal components of the outgoing cabinet such as circuit breakers, contactors, frequency converters, relays, PLC controllers, etc.

[0021] Electrical components 130 are installed within the working chamber 110. The first temperature sensor 400 is located within the working chamber 110 and is used to detect the temperature of the electrical components 130. In fact, the electrical components 130 refer to the functional core components of the outgoing line cabinet, including but not limited to one or more combinations of circuit breakers, contactors, frequency converters, relays, PLC controllers, soft starters, and reactors. Those skilled in the art should understand that the specific types, quantities, and layout of the electrical components 130 can be adaptively adjusted according to the rated capacity of the outgoing line cabinet, application scenarios (such as power distribution rooms, industrial and mining enterprises, and new energy power plants), and functional requirements. The figure shows only a schematic diagram of the mounting base for one type of electrical component 130 and does not constitute a limitation on the actual configuration. The first temperature sensor 400 is used to directly or indirectly detect the temperature of the electrical components 130, and its type can be a contact sensor or a non-contact infrared temperature measurement module. Its installation method is divided into two typical cases depending on the number of electrical components 130. The first scenario involves temperature measurement of a single electrical component 130. When there is only one main heat-generating element within the working chamber 110, the first temperature sensor 400 can be directly mounted on the heat dissipation surface of the metal casing of the electrical component 130, or embedded in the pre-reserved temperature measurement hole of the component using thermal grease. This method results in a thermal resistance of less than 0.5 K / W, accurately reflecting the core temperature of the component. The second scenario involves temperature measurement of multiple electrical components 130. When the working chamber 110 integrates multiple heat-generating elements, the first temperature sensor 400 can employ a multi-point independent monitoring or weighted equivalent temperature measurement strategy. Regardless of the method used, the sampling period of the first temperature sensor 400 can be adjusted within the range of 1-5 seconds. Signal transmission can be wired or wireless to adapt to different wiring complexities and response speed requirements.

[0022] The temperature control assembly 300 includes heat-conducting fins 310, a circulating pump 320 disposed outside the electrical cabinet body 100, and a temperature controller 330. The heat-conducting fins 310 are mounted on the partition plate 200 and penetrate the working chamber 110 and the heat exchange chamber 120. The heat-conducting fins 310 are in thermal contact with the electrical components 130 within the working chamber 110. The heat-conducting fins 310 have a liquid passage 340 within the heat exchange chamber 120. The circulating pump 320 is used to circulate the heat-conducting liquid between the liquid passage 340 and the temperature controller 330. In practice, the power of the circulating pump 320 is adjustable, such as a brushless DC inverter gear pump or a magnetically driven centrifugal pump, which can steplessly adjust the flow rate, with an adjustment range of 10%-110% of the rated flow rate. The thermostat 330 can change the temperature of the heat transfer fluid by means of cooling or heating. The heat transfer fins 310 can be installed in the electrical cabinet by means of threaded connection and make thermal contact with the electrical component 130, thereby regulating the temperature of the electrical component 130.

[0023] Traditional outgoing cabinets use a single, integrated unit, allowing hot and cold air to mix freely, resulting in low heat dissipation efficiency and a lack of directional control. This application uses a partition plate 200 to rigidly divide the cabinet into a working chamber 110 and a heat exchange chamber 120, making the heat-conducting fins 310 the primary heat exchange channel. Combined with a sealing element 210 to block air crosstalk, this creates a directional heat flow path where the working chamber 110 is sealed and insulated, and the heat exchange chamber 120 undergoes forced heat exchange. The advantages are as follows: First, the heat flow path is controllable. Heat can only be conducted from the working chamber 110 to the heat exchange chamber 120 along the heat-conducting fins 310, avoiding heat accumulation caused by airflow short circuits in traditional cabinets. Second, multi-cabinet collaborative management. A high-power thermostat 330 can centrally regulate the temperature of the heat-conducting fins 310 in multiple electrical cabinet bodies 100 through parallel pipelines. Each branch is equipped with an electric proportional regulating valve and a flow meter. The control component 500 realizes differentiated temperature regulation based on the independent feedback from the first temperature sensor 400 of each cabinet. Compared with each cabinet having an independent temperature regulation unit, it is more energy efficient. This centralized intelligent temperature regulation architecture provides an economical and efficient solution for large-scale thermal management of large power distribution rooms.

[0024] The circulating pump 320, the first temperature sensor 400, the thermostat 330, and the electrical components 130 are all communicatively connected to the control component 500. Specifically, the control component 500 can have a built-in high-performance microprocessor (such as an ARM Cortex-M4 or DSP chip) and establish bidirectional real-time data interaction with the circulating pump 320, the first temperature sensor 400, the thermostat 330, and the electrical components 130 via RS485, CAN bus, or Modbus TCP / IP protocol. At the feedback control level, the control component 500 acquires the real-time temperature value of the first temperature sensor 400 with a sampling period of 10-100 milliseconds, and uses an incremental PID algorithm or a fuzzy adaptive control algorithm to dynamically calculate the precise cooling / heating capacity required, rather than the coarse, step-by-step adjustment used in traditional technologies. For example, when the temperature deviates from the set value by 2°C, the control component 500 does not simply start the thermostat 330 at full power. Instead, it precisely calculates that the speed of the circulating pump 320 needs to be increased from 3000 rpm to 4500 rpm, and at the same time, the semiconductor cooling current of the thermostat 330 is adjusted from 5A to 8A. This achieves stepless precision control, and the steady-state temperature error can be controlled within ±0.5°C. The response time is shortened to within 15 seconds, avoiding the temperature oscillation phenomenon of "overshoot-reverse" in traditional systems.

[0025] Furthermore, the control component 500 can possess predictive feedforward control capabilities, actively constructing a three-dimensional time-series database of "temperature-load-time". By continuously collecting and storing historical temperature data, operating current, switching status, and load rate of electrical components 130, the lightweight machine learning model (such as least squares support vector machine or LSTM neural network) built into the control component 500 can autonomously identify heat generation patterns and collaborate with external analysis software (such as cloud-based energy management platforms or edge computing gateways) to predict power consumption trends and dynamic heat generation for the next 15 minutes to 2 hours. For example, 3 minutes before a high-power load (such as motor start-up) is predicted to be activated, the control component 500 pre-increases the speed of the circulating pump 320 to a warning value and actively lowers the target temperature of the thermostat 330 by 3-5°C, allowing the heat transfer fluid to reserve cooling capacity in advance; when a sudden increase in load causes the heat generation to double instantaneously, the system is already in a "pre-cooling" state, which can suppress temperature fluctuations from above ±15°C in traditional systems to within ±3°C. This predictive control strategy of "calculating before adjusting and cooling before heating" can not only improve the temperature control efficiency ratio, but also ensure that the electrical component 130 always operates in the constant temperature range with the least thermal stress, thus extending its service life.

[0026] The intelligent heat dissipation system for outgoing line cabinets disclosed in this application utilizes the cooperation of the cabinet body 100, partition plate 200, temperature adjustment component 300, first temperature sensor 400, and control component 500 to make the heat-conducting fins 310 the primary heat exchange channel. Combined with the sealing component 210 to block air crosstalk, a directional heat flow path is formed, with the working chamber 110 being sealed and insulated, and the heat exchange chamber 120 undergoing forced heat exchange. This shortens the response time for temperature adjustment and solves the problem that the heat dissipation methods of existing outgoing line cabinets are prone to causing extreme states of "overcooling" or "overheating." This ensures that the operating temperature of the electrical components 130 is stabilized within the optimal temperature range, extending their service life.

[0027] Specifically, the thermal conductivity of the heat-conducting fins 310 is preferably greater than that of the partition plate 200. In fact, the thermal conductivity of the heat dissipation fins is significantly greater than that of the partition plate 200. This thermal asymmetry forces the heat generated by the electrical components 130 to form a directional transmission path, so that the heat is preferentially conducted quickly along the low thermal resistance heat dissipation fins to the heat exchange cavity 120 and carried away by the heat-conducting liquid in the liquid channel 340, rather than diffused laterally to the partition plate 200 through the high thermal resistance path. On the one hand, this ensures centralized control of heat flux density, avoiding the local hot spot problem caused by disordered heat dissipation in traditional homogeneous material structures; on the other hand, it effectively suppresses parasitic heat loss from the working cavity 110 to the side wall of the cabinet, so that most of the heat is discharged through the controlled heat-conducting liquid cooling circuit, improving temperature regulation efficiency, while reducing uncontrolled air convection on both sides of the partition plate 200.

[0028] More specifically, the heat-conducting fins 310 are preferably made of copper or copper alloys, such as T2 copper, H62 brass, or aluminum bronze, with a thermal conductivity as high as 380-400 W / (m·K), ensuring that heat is conducted quickly with low thermal resistance; the partition plate 200 is preferably made of aluminum or aluminum alloys, such as 6061 aluminum alloy or die-cast aluminum, with a thermal conductivity controlled at 120-180 W / (m·K), which satisfies the structural strength requirements while retaining appropriate thermal resistance to suppress lateral heat diffusion.

[0029] The thermal resistance of the copper heat sink fins is much lower than that of the aluminum partition plate 200, allowing more than 13085% of the heat from the electrical components to enter the liquid cooling circuit along a predetermined path. Compared with the all-aluminum structure, the heat exchange efficiency is improved by 35% and the response time is shortened by 20%. Copper is only used in key heat-conducting components, while the partition plate 200 uses lightweight aluminum, making the weight of the entire system 40% lighter than the all-copper structure and reducing material costs by 50%. At the same time, it avoids the waste of cabinet volume caused by the excessive thickness of the partition plate 200.

[0030] Furthermore, a sealing element 210 is preferably provided at the connection between the heat-conducting fins 310 and the partition plate 200. The sealing element 210 is a graphite sealing ring or a flexible graphite gasket. The sealing element 210 has a compression ratio greater than 15% and a long-term temperature resistance higher than 200℃, ensuring that it can fill the microscopic gaps without excessive crushing, fully meeting the thermal stability requirements of the heat dissipation cavity under high-temperature conditions. In addition, a sealing element 210 is also provided at the connection between the heat-conducting fins 310 and the electrical cabinet body 100. This sealing element 210 is provided at the connection between the heat dissipation fins and the partition plate 200, and at the connection between the heat dissipation fins and the through holes of the electrical cabinet body 100, forming a double-node sealing defense line.

[0031] Because of the copper heat sink fins (thermal expansion coefficient approximately 16.5 × 10⁻⁻⁻⁶) 6 / ℃) and aluminum partition plate 200 (thermal expansion coefficient approximately 23×10⁻ 6 The aluminum separator 200 expands differentially with increasing temperature ( / ℃). Due to the greater expansion of the aluminum separator 200, radial compressive stress is generated on the embedded graphite seal 210. Graphite material has excellent compression resilience (compression resilience rate >30%), and this stress further densifies its microporous structure, increasing the sealing pressure and creating a reverse reinforcing effect of "the hotter it gets, the tighter it becomes." Furthermore, the graphite seal 210 is electrochemically inert, forming an electrically insulating layer between the copper and aluminum dissimilar metal contact surfaces, completely avoiding galvanic corrosion caused by the electrode potential difference (copper +0.34V, aluminum -1.66V). This sealing solution exhibits excellent compatibility with the subsequent phase change material layer 220, eliminating the risk of material interpenetration or chemical reactions, significantly improving the reliability and economy of industrial applications.

[0032] It is worth mentioning that the partition plate 200 preferably has a phase change material layer 220 embedded on the side facing the working cavity 110. The phase change material layer 220 has a phase change temperature of 25-40℃ and a latent heat of phase change greater than 180J / g. In practical applications, when the electrical component 130 experiences a sudden surge in heat generation due to a load change (such as motor startup), and the first temperature sensor 400 detects a rapid temperature rise approaching 38°C, the control component 500 has not yet completed the response adjustment of the circulating pump 320 and the thermostat 330. At this time, the phase change material layer 220, due to its high heat capacity and latent heat of phase change, can instantly absorb a large amount of heat (heat storage density reaches 150-220 kJ / kg), keeping the temperature of the working chamber 110 basically stable below 40°C for 1-3 minutes, thus gaining valuable response time for the active cooling system. When the load decreases and the temperature drops below the phase change point, the phase change material condenses and releases heat. This heat is slowly carried away by the continuously circulating heat transfer fluid, achieving a peak-shaving and valley-filling effect for the heat load. This is equivalent to deploying a "thermal buffer battery" inside the working chamber 110, reducing the minute-level lag of traditional temperature control to second-level suppression. The use of phase change material layer 220 can significantly improve the thermal shock resistance. The phase change material can absorb 30%-50% of the heat from sudden power peaks, preventing temperature overshoot from exceeding the tolerance limit of electrical components 130. It is particularly suitable for impact load applications. It can greatly reduce system power consumption. By smoothing short-term heat peaks, the thermostat 330 does not need to be frequently started and stopped or run at full load, reducing the average annual operating load rate, improving energy saving rate, and extending equipment life.

[0033] Furthermore, the phase change material layer 220 preferably makes direct contact with the base of the electrical components 130 within the working cavity 110, such as the metal base of a circuit breaker, the heat sink of a frequency converter, or the DIN rail mounting surface of a contactor, achieving surface contact or embedded direct contact, rather than indirect heat transfer through air gaps. This direct contact design reduces thermal resistance to 0.05-0.1 K / W, enabling the phase change material to respond quickly and absorb heat within 10-20 seconds of temperature rise, improving the response speed by more than three times compared to non-contact layouts. Simultaneously, it avoids the risk of localized overheating due to poor contact, ensuring maximum thermal shock suppression.

[0034] Furthermore, the phase change material layer 220 preferably has a three-dimensional metal foam skeleton embedded in it or is encapsulated in microcapsules, the total thickness of the separator 200 is greater than or equal to 20 mm and the embedding depth of the phase change material layer 220 exceeds 50% of the thickness of the separator 200. Metal foam skeletons (such as copper foam or aluminum foam with a porosity of 90%-95%) can construct a three-dimensional continuous heat transfer network with a thermal conductivity of 8-12 W / (m·K), which improves the limitation of the low thermal conductivity (0.2-0.5 W / (m·K)) of traditional phase change materials by an order of magnitude, shortening the heat conduction time from the base of the electrical component to the phase change material to 5-10 seconds, significantly improving the response speed against thermal shock. Microencapsulation (such as melamine resin microencapsulation, with microcapsule particle size of 50-200μm and wall thickness of 2-5μm) solidifies the phase change material (usually a liquid organic phase change material) through polymer wall materials, effectively preventing leakage, phase separation and corrosive ion precipitation problems under long-term liquid use. The design of the total thickness of the partition plate 200 and the embedding depth of the phase change material layer 220 ensures the mechanical strength of the partition plate 200 while providing sufficient phase change material capacity, so that its heat storage capacity is sufficient to cope with sudden thermal shock for 3-5 minutes, and ensures that the temperature of the working chamber 110 can remain stable within the safe threshold during the start-up response delay of the thermostat 330.

[0035] It should be noted that the intelligent heat dissipation system of the outgoing line cabinet of this application also includes a fan 600 disposed on the upper part of the partition plate 200 for drawing air from the working chamber 110 to the heat exchange chamber 120. The working chamber 110 is provided with an air inlet 140 on the lower side, and the heat exchange chamber 120 is provided with an air outlet 150 on the lower side. The fan 600 is communicatively connected to the control component 500. The fan 600 is fixed to the pre-made mounting hole on the upper part of the partition plate 200 by a buckle or bolt. The air inlet 140 can be a louvered or slotted air inlet 140. A nylon filter (40-60 mesh) is embedded inside the air inlet to prevent dust from entering. The air outlet 150 can be a splash-proof air outlet 150. The air outlet faces downward and is equipped with an insect screen and a one-way check valve. While preventing insects and rodents from entering, it effectively blocks the backflow of external humid air that may be caused by density difference. In particular, it avoids the defect of traditional air outlet design where dust naturally settles into the heat exchange chamber 120 when the machine is stopped.

[0036] If the first temperature sensor 400 detects that the air temperature in the working chamber 110 exceeds a set threshold (e.g., 38°C), the control component 500 does not simply turn on the fan 600, but instead prioritizes starting the liquid-cooled circulation pump 320 to quickly reduce the temperature of the heat dissipation fins. At the same time, it intelligently changes the working state of the fan 600 according to the temperature rise rate. If the temperature rise rate exceeds the set value, the fan 600 starts to dissipate heat efficiently. The airflow path is "air intake at the bottom of the working chamber 110 - suction by the upper fan 600 - heat exchange chamber 120 - air outlet at the bottom". This avoids excessive ventilation that could lead to excessively low temperatures or dust accumulation, eliminates potential dead zones for localized heat accumulation in the liquid cooling system, improves the uniformity of the temperature field in the working chamber 110, and enhances the reliability and completeness of the overall heat dissipation system.

[0037] Specifically, the intelligent heat dissipation system for the outgoing line cabinet of this application preferably includes a second temperature sensor 700 disposed within the working chamber 110 for detecting the air temperature of the working chamber 110. The second temperature sensor 700 is communicatively connected to the control component 500. The second temperature sensor 700 provides a supplement to the solid thermal conductivity detection of the first temperature sensor 400 by rapidly sensing changes in the gas phase temperature of the working chamber 110. When the air temperature rise rate is too fast or temperature stratification occurs, the control component 500 can start the fan 600 or adjust its speed in advance based on the signal from the second temperature sensor 700, promptly breaking up heat accumulation and airflow dead zones, effectively avoiding the control lag problem caused by the thermal inertia of a single sensor.

[0038] More specifically, the intelligent heat dissipation system for the outgoing line cabinet of this application preferably includes a third temperature sensor 800 disposed in the heat exchange chamber 120 and located below the heat-conducting fins 310. The lower part of the partition plate 200 is provided with a circulation port 230. The air inlet 140, the air outlet 150 and the circulation port 230 are all equipped with electric switching valves 900. The third temperature sensor 800 and the three electric switching valves 900 are all communicatively connected to the control component 500.

[0039] In practice, three temperature thresholds should be preset in the control component 500: fan 600 start-up temperature T1 (e.g., 35℃), circulation / exhaust switching temperature T2 (e.g., 28℃, between T1 and fan 600 stop temperature), and fan 600 stop temperature T3 (e.g., 20℃). When the third temperature sensor 800 detects that the air temperature after being cooled by the heat-conducting fins 310 is less than or equal to T2, the control component 500 closes the electric valve of the air outlet 150 and opens the electric valve of the circulation port 230, forming a closed internal circulation of "working chamber 110 - fan 600 - heat exchange chamber 120 - heat-conducting fins 310 - circulation port 230 - working chamber 110". In this mode, the cooled air is reused, avoiding the surge in load on the thermostat 330 caused by the continuous introduction of high-temperature external air, while preventing the intrusion of external dust and moisture, maintaining the cleanliness of the working chamber 110. When the detected cooled air temperature exceeds T2, the control component 500 opens the electric valve of the air outlet 150 and closes the electric valve of the circulation port 230, switching to "external exhaust mode" to force hot air out of the cabinet and ensure that the temperature does not exceed the limit. This intelligent switching mechanism of "temperature self-sensing - airflow self-adaptation" improves the effective cooling capacity utilization rate of the system without increasing additional energy consumption, and is particularly suitable for operating conditions where the ambient temperature fluctuates greatly between day and night or the load changes intermittently.

[0040] The above are merely specific embodiments of this application, providing a detailed description of the application. The related descriptions are only for helping to understand the core ideas of this application and are not intended to limit the patent scope of this application. At the same time, for those skilled in the art, equivalent structural or procedural transformations made based on the ideas of this application and utilizing the content of the specification and drawings of this application, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An intelligent heat dissipation system for an outgoing line cabinet, characterized in that: The device includes an electrical cabinet body, a partition plate, a temperature control assembly, a first temperature sensor, and a control assembly. The partition plate is disposed within the electrical cabinet body and divides the cabinet body into a working chamber and a heat exchange chamber. Electrical components are installed in the working chamber. The first temperature sensor is disposed in the working chamber and is used to detect the temperature of the electrical components. The temperature control assembly includes heat-conducting fins, a circulating pump disposed outside the electrical cabinet body, and a thermostat. The heat-conducting fins are mounted on the partition plate and penetrate through the working chamber and the heat exchange chamber. The heat-conducting fins are in thermal contact with the electrical components in the working chamber. The heat-conducting fins are provided with liquid channels in the heat exchange chamber. The circulating pump is used to circulate the heat-conducting liquid between the liquid channels and the thermostat. The circulating pump, the first temperature sensor, the thermostat, and the electrical components are all communicatively connected to the control assembly.

2. The intelligent heat dissipation system for outgoing line cabinets as described in claim 1, characterized in that: The thermal conductivity of the heat-conducting fins is greater than that of the partition plate.

3. The intelligent heat dissipation system for outgoing line cabinets as described in claim 2, characterized in that: The heat-conducting fins are made of copper or copper alloy, and the partition plate is made of aluminum or aluminum alloy.

4. The intelligent heat dissipation system for outgoing line cabinets as described in claim 2, characterized in that: A sealing element is provided at the connection between the heat-conducting fins and the partition plate. The sealing element is made of graphite sealing ring or flexible graphite gasket. The compression ratio of the sealing element is greater than 15% and the long-term temperature resistance is higher than 200℃.

5. The intelligent heat dissipation system for outgoing line cabinets as described in claim 1, characterized in that: The partition plate is fitted with a phase change material layer on the side facing the working chamber. The phase change material layer has a phase change temperature of 25-40℃ and a latent heat of phase change greater than 180J / g.

6. The intelligent heat dissipation system for outgoing line cabinets as described in claim 5, characterized in that: The phase change material layer is in direct contact with the base of the electrical components inside the working cavity.

7. The intelligent heat dissipation system for outgoing line cabinets as described in claim 6, characterized in that: The phase change material layer is embedded with a three-dimensional metal foam skeleton or is encapsulated in microcapsules. The total thickness of the separator is greater than or equal to 20 mm and the embedding depth of the phase change material layer exceeds 50% of the thickness of the separator.

8. The intelligent heat dissipation system for outgoing line cabinets as described in claim 1, characterized in that: It also includes a fan installed on the upper part of the partition plate for drawing air from the working chamber to the heat exchange chamber. The working chamber has an air inlet on the lower side and the heat exchange chamber has an air outlet on the lower side. The fan is communicatively connected to the control component.

9. The intelligent heat dissipation system for outgoing line cabinets as described in claim 8, characterized in that: It also includes a second temperature sensor disposed in the working chamber and used to detect the air temperature in the working chamber, the second temperature sensor being communicatively connected to the control component.

10. The intelligent heat dissipation system for outgoing line cabinets as described in claim 9, characterized in that: It also includes a third temperature sensor located inside the heat exchange chamber and below the heat-conducting fins. The lower part of the partition plate is provided with a circulation port. The air inlet, air outlet and circulation port are all equipped with electric switching valves. The third temperature sensor and the three electric switching valves are all communicatively connected to the control component.

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