An electrical utility protection device

Abstract

This invention discloses a power facility protection device, including a protection cabinet and a control module. The protection cabinet has multiple air inlets on one side and multiple air outlets on the other side, with the inlets and outlets facing each other. The cabinet interior has multiple layered partitions, dividing the interior into multiple installation areas for electrical components. Each installation area corresponds to one air inlet and one air outlet. Each installation area is equipped with an air supply unit and multiple temperature sensors. The control module is connected to each air supply unit and each temperature sensor, receiving the detection data from the temperature sensors and controlling the operating status of each air supply unit. This invention reconstructs discrete temperature detection data into a continuous three-dimensional temperature field distribution model, achieving refined and visual perception of the temperature distribution inside the protection cabinet, providing a reliable data foundation for precise heat dissipation control.

Description

Technical Field

[0001] This invention belongs to the field of power facility technology, and specifically relates to a power facility protection device. Background Technology

[0002] In the field of power facility protection, electrical components generate a large amount of heat during operation. If this heat cannot be dissipated effectively and promptly, the component temperature will rise, affecting its operating efficiency and reliability, and even causing malfunctions. Existing power protection cabinets typically employ an integrated ventilation and heat dissipation solution, which involves installing air inlets and outlets on the cabinet and dissipating heat through natural convection or forced convection by fans. However, because the heat output of electrical components varies in different areas within the cabinet, the heat dissipation requirements of each area differ. The integrated ventilation solution struggles to adjust the airflow according to the actual heat generation in each installation area, easily leading to insufficient heat dissipation in some areas. This not only results in low heat dissipation efficiency but also wastes energy. Furthermore, existing solutions lack the ability to identify localized heat sources within the cabinet, failing to promptly detect hot spots and implement targeted heat dissipation measures. Therefore, it is necessary to provide a power facility protection device. Summary of the Invention

[0003] The purpose of this invention is to provide a power facility protection device to solve the aforementioned problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a power facility protection device, comprising: A protective cabinet has multiple air inlets on one side and multiple air outlets on the other side, with the air inlets and outlets facing each other. The cabinet's interior is divided into multiple partitions, each partition creating a mounting area for electrical components. Each mounting area corresponds to one air inlet and one air outlet. Each mounting area is equipped with an air supply unit and multiple temperature sensors. The control module is connected to each air supply unit and each temperature sensor respectively, and is used to receive the detection data of each temperature sensor and control the operating status of each air supply unit. The control module includes a temperature field reconstruction unit, a local heat source identification unit, and a control unit. The temperature field reconstruction unit is used to generate a three-dimensional temperature field distribution model inside the protective cabinet based on the detection data of each temperature sensor. The local heat source identification unit is used to identify the location of local heat sources based on the three-dimensional temperature field distribution model. The control unit is connected to each air supply unit and each temperature sensor, and is used to adjust the rotation speed of the air supply unit in each installation area based on the temperature data of each installation area and the location of the local heat source.

[0005] As an optional implementation of the above technical solution, multiple temperature sensors in each installation area are arranged at non-uniform intervals in the installation area; the temperature field reconstruction unit uses radial basis function interpolation or Kriging interpolation algorithm to reconstruct the discrete temperature sensor detection data into a continuous three-dimensional temperature field distribution model.

[0006] As an optional implementation of the above technical solution, the control module further includes a correction module, which is used to acquire known heat generation power data of electrical components in each installation area, and use the heat generation power data as prior information to correct the three-dimensional temperature field distribution model.

[0007] As an optional implementation of the above technical solution, the local heat source identification unit uses a hotspot clustering algorithm based on a temperature gradient threshold to identify the location of local heat sources, which includes: In the three-dimensional temperature field distribution model, continuous regions where the temperature gradient exceeds a first preset threshold and the temperature value exceeds a second preset threshold are marked as hotspot regions. Centroid tracking is performed on the hotspot regions at adjacent time points to identify the location of local heat sources and their movement trends.

[0008] As an optional implementation of the above technical solution, the local heat source identification unit is further used to determine the heat source type based on the temperature rise rate and temperature distribution pattern of the hot spot area. The heat source type includes sudden heat sources and gradually changing heat sources; and to assign a higher processing priority to the sudden heat sources than to the gradually changing heat sources.

[0009] As an optional implementation of the above technical solution, the control unit adopts a strategy combining feedforward control and feedback control to adjust the rotational speed of each air supply unit: The feedforward control is as follows: based on the current temperature distribution output by the temperature field reconstruction unit, the location of the local heat source output by the local heat source identification unit, and the real-time load current data of the electrical components in each installation area, the temperature rise trend within a preset time period is predicted, and the rotation speed of the air supply unit is adjusted in advance. The feedback control is as follows: closed-loop correction is performed based on the deviation between the real-time temperature data and the target temperature.

[0010] As an optional implementation of the above technical solution, the control unit has multiple preset heat dissipation modes, including silent mode, balanced mode, strong cooling mode and emergency mode; the control unit automatically matches and switches the heat dissipation mode according to the comprehensive index of the highest temperature, temperature distribution uniformity and number of local heat sources in each installation area.

[0011] As an optional implementation of the above technical solution, when multiple temperature sensors in the same installation area detect a non-uniform temperature distribution, the control unit controls the air supply unit in the installation area to operate in a periodic variable speed mode to generate a periodic pulsating airflow.

[0012] As an optional implementation of the above technical solution, the layered partition includes a flame-retardant plate, the upper surface of which is provided with an upper heat-conducting layer, and the lower surface of which is provided with a lower heat-insulating layer.

[0013] As an optional implementation of the above technical solution, the air supply unit includes a blower, which is located near the air outlet; the air inlet is provided with a filter screen.

[0014] The beneficial effects of this invention are as follows: 1. By setting up multiple temperature sensors in each installation area, in conjunction with a temperature field reconstruction unit, discrete temperature detection data is reconstructed into a continuous three-dimensional temperature field distribution model, achieving refined and visual perception of the temperature distribution inside the protective cabinet. Compared to traditional solutions that rely on a single temperature detection point, the three-dimensional temperature field model can comprehensively reflect the temperature conditions at various locations within the cabinet, providing a reliable data foundation for precise heat dissipation control.

[0015] 2. By performing hotspot clustering analysis and centroid tracking on the three-dimensional temperature field through the local heat source identification unit, the location and movement trend of local heat sources can be accurately identified. Heat sources are classified into two types: sudden and gradually changing, with sudden heat sources given higher processing priority. This identification and classification mechanism enables the control unit to adopt differentiated response strategies for different types of heat sources, especially for sudden heat sources with higher failure risks, allowing for rapid intervention and improving the device's safety protection capabilities.

[0016] 3. The control unit employs a strategy combining feedforward and feedback control. Feedforward control uses current temperature distribution, local heat source locations, and real-time load current data to predict future temperature rise trends and adjust speed in advance. Feedback control performs closed-loop correction based on real-time temperature deviations. This composite control strategy balances the foresight and accuracy of the response, avoiding the lag problem inherent in feedback control while ensuring temperature control stability and effectively suppressing temperature fluctuations.

[0017] 4. The control unit has four pre-stored heat dissipation modes: silent, balanced, strong cooling, and emergency. It automatically switches between modes based on comprehensive indicators such as the highest temperature of each installation area, temperature distribution uniformity, and the number of local heat sources. The air supply unit has different base speed values, response speeds, and upper limits for speed adjustment in different modes, allowing the device to flexibly balance heat dissipation, energy consumption, and noise according to actual operating conditions, adapting to different usage scenarios and environmental requirements.

[0018] 5. When a non-uniform temperature distribution is detected in the same installation area, the control unit controls the air supply unit to operate in a periodic variable speed mode to generate pulsating airflow, which breaks the stable structure of the boundary layer, enhances the turbulence of the airflow, improves the uniformity of airflow distribution in the installation area, effectively eliminates the heat accumulation of local hot spots, and improves the uniformity of the temperature field. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a power facility protection device according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a layered partition in one embodiment of the present invention.

[0020] In the diagram: 1-protective cabinet; 2-air inlet; 3-air outlet; 4-layer partition; 5-air supply unit; 6-flame retardant board; 7-upper heat-conducting layer; 8-lower heat insulation layer. Detailed Implementation

[0021] like Figure 1 and Figure 2 As shown, this embodiment provides a power facility protection device, including a protection cabinet 1 and a control module. The protection cabinet 1 serves as a housing and protective enclosure for electrical components. It has multiple air inlets 2 on one side and multiple air outlets 3 on the other side, with the air inlets 2 and outlets 3 facing each other to form a transverse airflow channel inside the protection cabinet 1. The protection cabinet 1 has multiple layered partitions 4 arranged at intervals along the vertical direction of the protection cabinet 1, dividing the interior into multiple installation areas for installing electrical components. Each installation area corresponds to one air inlet 2 and one air outlet 3, meaning each installation area has an independent air inlet and outlet channel. Each installation area is equipped with an air supply unit 5 and multiple temperature sensors. The air supply unit 5 supplies cooling airflow into the corresponding installation area, and the temperature sensors collect temperature data at different locations within that installation area. Preferably, the air supply unit 5 includes a blower located near the air outlet 3, and the air inlet 2 is equipped with a filter.

[0022] The control module is connected to each air supply unit 5 and each temperature sensor respectively, and is used to receive the detection data of the temperature sensors and control the operating status of each air supply unit 5 accordingly.

[0023] Specifically, the control module includes a temperature field reconstruction unit, a local heat source identification unit, and a control unit. The temperature field reconstruction unit generates a three-dimensional temperature field distribution model inside the protection cabinet 1 based on the discrete temperature data detected by each temperature sensor. To achieve accurate temperature field reconstruction, multiple temperature sensors in each installation area are arranged at non-uniform intervals—the sensors are denser in areas with large temperature gradients (such as near areas with concentrated electrical components) and sparser in areas with smaller temperature gradients. The temperature field reconstruction unit uses radial basis function interpolation or Kriging interpolation algorithms to reconstruct the discrete temperature sensor detection data into a continuous three-dimensional temperature field distribution model. Both radial basis function interpolation and Kriging interpolation are spatial interpolation methods that can calculate the continuous distribution in the entire spatial domain based on the values ​​of a finite number of sampling points, making them suitable for reconstructing spatially continuous physical fields such as temperature fields.

[0024] To further improve the accuracy of temperature field reconstruction, the control module also includes a correction module. The correction module acquires known heat generation power data of electrical components within each installation area (e.g., calculated from the component specifications or real-time load current), and uses this heat generation power data as prior information to correct the three-dimensional temperature field distribution model. Specifically, the correction module uses the known heat generation locations and heat output of the electrical components as constraints to adjust the initial model output by the temperature field reconstruction unit, making the reconstructed temperature field more consistent with the actual physical distribution.

[0025] The local heat source identification unit is used to identify the location of local heat sources based on a three-dimensional temperature field distribution model. Specifically, the local heat source identification unit uses a hotspot clustering algorithm based on a temperature gradient threshold to identify the location of local heat sources. This process includes the following steps: First, continuous regions in the three-dimensional temperature field distribution model where the temperature gradient exceeds a first preset threshold and the temperature value exceeds a second preset threshold are marked as hotspot regions. Then, the centroids of hotspot regions at adjacent time points are tracked. By comparing the position changes of the centroids of hotspot regions at different time points, the location of local heat sources and their movement trends are identified. This dynamic tracking-based identification method can distinguish between static heat sources (such as continuously heating components) and dynamic heat sources (such as hotspots that change over time or move in location).

[0026] Furthermore, the local heat source identification unit is also used to determine the type of heat source based on the temperature rise rate and temperature distribution pattern of the hot spot area. Heat source types include sudden heat sources and gradually changing heat sources. Sudden heat sources refer to heat sources where the temperature rises sharply within a short period of time, usually caused by sudden faults such as instantaneous overload or short circuit. Gradually changing heat sources refer to heat sources where the temperature rises slowly over time, usually caused by the aging of components due to long-term operation or the gradual deterioration of heat dissipation conditions. For sudden heat sources, due to their higher potential failure risk, faster intervention is required; therefore, the local heat source identification unit assigns a higher processing priority to sudden heat sources than to gradually changing heat sources.

[0027] The control unit is connected to each air supply unit 5 and each temperature sensor, and is used to adjust the rotation speed of the air supply unit 5 in each installation area according to the temperature data and local heat source location of each installation area. Specifically, the control unit adopts a strategy combining feedforward control and feedback control to adjust the rotation speed of each air supply unit 5. Feedforward control is as follows: based on the current temperature distribution output by the temperature field reconstruction unit, the local heat source location output by the local heat source identification unit, and the real-time load current data of electrical components in each installation area, the control unit predicts the temperature rise trend within a preset time period in advance and adjusts the rotation speed of the air supply unit 5 in advance. For example, when the load current of an electrical component suddenly increases, the control unit can predict its temperature rise in the future period based on the thermal model of the component and increase the rotation speed of the corresponding air supply unit 5 in advance to avoid responding only after the temperature has already risen. Feedback control is as follows: closed-loop correction is performed based on the deviation between the real-time temperature data and the target temperature. That is, when the real-time temperature is higher than the target temperature, the rotation speed of the air supply unit 5 is increased; when the real-time temperature is lower than the target temperature, the rotation speed of the air supply unit 5 is appropriately reduced to maintain the temperature stable within the target range.

[0028] To adapt to different operating conditions and noise requirements, the control unit has multiple preset heat dissipation modes, including silent mode, balanced mode, strong cooling mode, and emergency mode. In silent mode, each air supply unit 5 operates at a lower speed to prioritize noise control; in balanced mode, each air supply unit 5 adjusts its speed evenly according to the temperature of each area, balancing heat dissipation effect and energy consumption; in strong cooling mode, each air supply unit 5 operates at a higher speed to prioritize heat dissipation effect; in emergency mode, each air supply unit 5 operates at full speed to cope with extreme high temperatures or sudden failures. The control unit automatically matches and switches the heat dissipation mode based on a comprehensive index of the highest temperature, temperature distribution uniformity, and number of local heat sources in each installation area. The reference speed, speed adjustment response, and upper limit of speed adjustment of each air supply unit 5 differ in different heat dissipation modes to adapt to the heat dissipation needs of different scenarios.

[0029] To achieve better heat dissipation uniformity, when multiple temperature sensors within the same installation area detect non-uniform temperature distribution, the control unit controls the air supply unit 5 within that area to operate in a periodically variable speed mode, generating periodic pulsating airflow. This pulsating airflow, through periodic velocity changes, breaks down the boundary layer, increases airflow turbulence, and improves the uniformity of airflow distribution within the installation area, thereby removing heat accumulated in localized hot spots.

[0030] like Figure 2 As shown, in one specific embodiment, the layered partition 4 includes a flame-retardant plate 6, with an upper heat-conducting layer 7 on the upper surface and a lower heat-insulating layer 8 on the lower surface. The upper heat-conducting layer 7 has good thermal conductivity, enabling it to conduct and diffuse the heat generated by electrical components in the upper installation area horizontally, preventing heat accumulation in local areas; the lower heat-insulating layer 8 has a low thermal conductivity, preventing heat from being transferred downwards from the partition and preventing thermal crosstalk between adjacent installation areas.

[0031] When the power facility protection device of the present invention is in operation, multiple temperature sensors distributed in various installation areas first collect temperature data at their respective locations in real time, and transmit the detected data to the temperature field reconstruction unit of the control module. The temperature field reconstruction unit receives the discrete temperature values ​​uploaded by each temperature sensor, and uses radial basis function interpolation or Kriging interpolation algorithms, combined with the spatial coordinate positions of each sensor, to reconstruct these discrete data into a three-dimensional temperature field distribution model covering the entire internal space of the protection cabinet 1. The correction module then obtains the known heat generation power data of electrical components in each installation area, and uses this as prior information to correct the three-dimensional temperature field distribution model, so that the reconstructed temperature field is closer to the actual physical distribution.

[0032] The reconstructed 3D temperature field distribution model is simultaneously transmitted to the local heat source identification unit and the control unit. The local heat source identification unit scans the entire temperature field, marking continuous regions where the temperature gradient exceeds a first preset threshold and the temperature value exceeds a second preset threshold as hotspot regions. By tracking the centroid of the hotspot regions at adjacent time points, the unit determines the location of the heat source and its time-varying trend. Furthermore, based on the temperature rise rate and temperature distribution pattern of the hotspot regions, the local heat source identification unit classifies heat sources into sudden heat sources and gradually changing heat sources, assigning higher processing priority to sudden heat sources.

[0033] Based on the received temperature distribution data and local heat source location information, combined with the real-time load current data of electrical components in each installation area, the control unit adjusts each air supply unit 5 using a strategy combining feedforward and feedback control. In the feedforward control path, the control unit predicts the temperature rise trend over a future period and issues speed adjustment commands to the air supply units 5 in the corresponding installation area in advance. In the feedback control path, the control unit compares the real-time temperature with the target temperature and performs closed-loop correction based on the deviation. In addition, based on comprehensive indicators such as the highest temperature in each installation area, temperature distribution uniformity, and the number of local heat sources, the control unit automatically matches and switches between silent mode, balanced mode, strong cooling mode, or emergency mode, and adjusts the speed reference value and speed adjustment response range of the air supply units 5 accordingly in different modes.

[0034] When uneven temperature occurs in a certain installation area, the control unit controls the air supply unit 5 in that area to operate in a periodic variable speed mode, generating pulsating airflow, breaking the boundary layer, and improving the uniformity of airflow distribution. When the temperature in a certain installation area exceeds a first preset threshold, the control unit increases the rotation speed of the air supply unit 5 in that area.

[0035] Throughout the operation, the upper heat-conducting layer 7 of the layered partition 4 evenly conducts and diffuses the heat generated by the electrical components in each installation area in the horizontal direction, preventing local heat accumulation; the lower heat insulation layer 8 of the layered partition 4 prevents heat from being transferred downwards, reducing thermal crosstalk between adjacent installation areas. Cooling airflow enters each installation area from the air inlet 2, flows through the heat-generating electrical components, and carries the heat out from the air outlet 3, completing the entire heat dissipation cycle.

[0036] Compared with existing technologies, the power facility protection device provided by this invention has the following advantages: 1. By setting up multiple temperature sensors in each installation area, in conjunction with a temperature field reconstruction unit, discrete temperature detection data is reconstructed into a continuous three-dimensional temperature field distribution model, achieving refined and visual perception of the internal temperature distribution of the protection cabinet 1. Compared to traditional solutions that rely on a single temperature detection point, the three-dimensional temperature field model can comprehensively reflect the temperature conditions at various locations within the cabinet, providing a reliable data foundation for precise heat dissipation control.

[0037] 2. By performing hotspot clustering analysis and centroid tracking on the three-dimensional temperature field through the local heat source identification unit, the location and movement trend of local heat sources can be accurately identified. Heat sources are classified into two types: sudden and gradually changing, with sudden heat sources given higher processing priority. This identification and classification mechanism enables the control unit to adopt differentiated response strategies for different types of heat sources, especially for sudden heat sources with higher failure risks, allowing for rapid intervention and improving the device's safety protection capabilities.

[0038] 3. The control unit employs a strategy combining feedforward and feedback control. Feedforward control uses current temperature distribution, local heat source locations, and real-time load current data to predict future temperature rise trends and adjust speed in advance. Feedback control performs closed-loop correction based on real-time temperature deviations. This composite control strategy balances the foresight and accuracy of the response, avoiding the lag problem inherent in feedback control while ensuring temperature control stability and effectively suppressing temperature fluctuations.

[0039] 4. The control unit has four pre-stored heat dissipation modes: silent, balanced, strong cooling, and emergency. It automatically switches between modes based on comprehensive indicators such as the highest temperature of each installation area, temperature distribution uniformity, and the number of local heat sources. The air supply unit 5 has different speed reference values, response speeds, and upper limits of speed adjustment in different modes, allowing the device to flexibly balance heat dissipation effect, energy consumption, and noise according to actual operating conditions, adapting to different usage scenarios and environmental requirements.

[0040] 5. When a non-uniform temperature distribution is detected in the same installation area, the control unit controls the air supply unit 5 to operate in a periodic variable speed mode to generate pulsating airflow, which breaks the stable structure of the boundary layer, enhances the turbulence of the airflow, improves the uniformity of airflow distribution in the installation area, effectively eliminates the heat accumulation of local hot spots, and improves the uniformity of the temperature field.

[0041] In the description of this invention, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. They can refer to fixed connections, detachable connections, or integral connections; they can be mechanical or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this invention. Furthermore, the specific features and structures described in the embodiments are included in at least one implementation method. Those skilled in the art can combine features from different implementation methods without contradiction. The scope of protection of this invention is not limited to the specific implementation methods described above. Based on the basic technical concept of this invention, implementation methods that can be conceived by those skilled in the art without creative effort are all within the scope of protection of this invention.

Claims

1. A power facility protection device, characterized in that, include: A protective cabinet (1) has multiple air inlets (2) on one side and multiple air outlets (3) on the other side. The air inlets (2) and the air outlets (3) are arranged opposite to each other. The protective cabinet (1) has multiple layered partitions (4) inside. The multiple layered partitions (4) divide the interior of the protective cabinet (1) into multiple installation areas for installing electrical components. Each installation area is respectively arranged with one air inlet (2) and one air outlet (3). Each installation area is equipped with an air supply unit (5) and multiple temperature sensors. as well as The control module is connected to each air supply unit (5) and each temperature sensor respectively, and is used to receive the detection data of each temperature sensor and control the operating status of each air supply unit (5). The control module includes a temperature field reconstruction unit, a local heat source identification unit, and a control unit. The temperature field reconstruction unit is used to generate a three-dimensional temperature field distribution model inside the protection cabinet (1) based on the detection data of each temperature sensor. The local heat source identification unit is used to identify the location of local heat sources based on the three-dimensional temperature field distribution model. The control unit is connected to each air supply unit (5) and each temperature sensor respectively. The control unit is used to adjust the rotation speed of the air supply unit (5) in each installation area based on the temperature data of each installation area and the location of the local heat source.

2. The power facility protection device according to claim 1, characterized in that, Multiple temperature sensors within each installation area are arranged at non-uniform intervals within the installation area; the temperature field reconstruction unit uses radial basis function interpolation or Kriging interpolation algorithm to reconstruct the discrete temperature sensor detection data into a continuous three-dimensional temperature field distribution model.

3. The power facility protection device according to claim 2, characterized in that, The control module further includes a correction module, which is used to acquire known heat generation power data of electrical components in each installation area, and use the heat generation power data as prior information to correct the three-dimensional temperature field distribution model.

4. The power facility protection device according to claim 1, characterized in that, The local heat source identification unit uses a hotspot clustering algorithm based on a temperature gradient threshold to identify the location of local heat sources, and includes: In the three-dimensional temperature field distribution model, continuous regions where the temperature gradient exceeds a first preset threshold and the temperature value exceeds a second preset threshold are marked as hotspot regions. Centroid tracking is performed on the hotspot regions at adjacent time points to identify the location of local heat sources and their movement trends.

5. The power facility protection device according to claim 4, characterized in that, The local heat source identification unit is also used to determine the type of heat source based on the temperature rise rate and temperature distribution pattern of the hot spot area. The heat source type includes sudden heat sources and gradually changing heat sources. The sudden heat source is given a higher processing priority than the gradually changing heat source.

6. The power facility protection device according to claim 3, characterized in that, The control unit uses a strategy combining feedforward control and feedback control to adjust the rotational speed of each air supply unit (5): The feedforward control is as follows: based on the current temperature distribution output by the temperature field reconstruction unit, the location of the local heat source output by the local heat source identification unit, and the real-time load current data of the electrical components in each installation area, the temperature rise trend within a preset time period is predicted, and the rotation speed of the air supply unit (5) is adjusted in advance. The feedback control is as follows: closed-loop correction is performed based on the deviation between the real-time temperature data and the target temperature.

7. The power facility protection device according to claim 1, characterized in that, The control unit has multiple preset heat dissipation modes, including silent mode, balanced mode, strong cooling mode and emergency mode; the control unit automatically matches and switches the heat dissipation mode according to the comprehensive indicators of the highest temperature, temperature distribution uniformity and number of local heat sources in each installation area.

8. The power facility protection device according to claim 1, characterized in that, When multiple temperature sensors in the same installation area detect a non-uniform temperature distribution, the control unit controls the air supply unit (5) in the installation area to operate in a periodic variable speed mode to generate a periodic pulsating airflow.

9. The power facility protection device according to claim 1, characterized in that, The layered partition (4) includes a flame-retardant plate (6), with an upper heat-conducting layer (7) on the upper surface of the flame-retardant plate (6) and a lower heat-insulating layer (8) on the lower surface of the flame-retardant plate (6).

10. The power facility protection device according to claim 1, characterized in that, The air supply unit (5) includes a blower, which is located near the air outlet (3); the air inlet (2) is equipped with a filter screen.

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