1349results about "Modifications using gaseous coolants" patented technology

A docking system is disclosed for an unmanned aerial vehicle (UAV). The docking system includes a base station that is configured to receive the UAV and a pedestal that is configured to support the base station in an elevated position. The pedestal defines an interior space that is configured in correspondence with an outer contour of the base station such that the base station is positionable within the pedestal to protect the base station during nonuse.

The invention relates to the technical field of power adapter temperature management, and discloses a gallium nitride power adapter temperature management system comprising a dynamic thermal model module used for accurately predicting the temperature change trend of each key component; the multi-level temperature monitoring network module is used for forming a complete temperature distribution diagram; the multi-device collaborative sensing module is used for generating a sensing result of the whole heat dissipation environment; the self-adaptive air duct structure module is used for optimizing an air flow path; the heat dissipation path module based on swarm intelligence is used for calculating and generating an optimal multi-device collaborative heat dissipation path by applying a swarm intelligence algorithm; the self-adaptive heat dissipation control strategy module is used for realizing multi-target balance optimization of temperature, noise and energy consumption; the problem that heat dissipation is difficult when multiple adapters are used in a centralized mode is solved, heat dissipation efficiency is improved, energy consumption is reduced, and noise is reduced.

The invention provides an immersed liquid cooling device, a control method and a system, and relates to the technical field of heat dissipation, the temperature of an inlet and an outlet of a chip-level evaporator at a chip and the highest temperature of the chip are obtained in real time through a preset sensor, and the corresponding relation between the inlet and outlet temperature difference and a preset threshold value is determined; if the outlet temperature difference is smaller than the preset threshold value, the valve opening degree of a pipeline valve corresponding to the outlet temperature difference is controlled to be reduced along with increasing of the outlet temperature difference according to a preset adjusting method, and the valve opening degree is determined in real time; when the valve opening degree reaches the minimum value and the outlet temperature is still smaller than the preset threshold value, the target fan rotating speed is determined through a first preset formula according to the chip highest temperature and the chip heating power; and if the outlet temperature difference is equal to the preset threshold value, the target fan rotating speed is determined according to the chip highest temperature and the chip heating power. According to the invention, the problem that an immersed liquid cooling device, a control method and a system which are controllable in cooling object and cooling effect and wide in application range are lacked in the prior art is solved.

The invention belongs to the technical field of integrated circuits, and particularly relates to a speed-adjustable fan driving and anomaly detection circuit with high reliability and low cost. Comprising a current expansion driving module for providing a voltage FCC stabilized by an LDO for a fan and performing current expansion on an output current of the LDO to drive the fan; the logic control module is connected with the current expansion driving module and is used for adjusting a control signal ADJlt; n: 0gt; the value of the voltage FCC output by the LDO is changed; the open circuit and locked-rotor detection module is connected with the logic control module and the VIN port of the LDO; and the short circuit detection module is connected with the logic control module and the output end of the LDO, outputs a signal to a state flag bit FTO, and judges whether the fan is in a normal working state, an open circuit state, a locked-rotor state or a short circuit state or not according to the waveform and the level of the state flag bit FTO. The speed-adjustable fan driving circuit is integrated, and the function of detecting various abnormal states of the fan is achieved.

The invention belongs to the field of overvoltage protection, and relates to an overvoltage stabilizing and protecting device which comprises a data acquisition operation module, a control logic module, a display module, an overvoltage protecting assembly and a high-voltage vacuum circuit breaker or an electric isolation handcart structure. The real-time monitoring and protection of the working state of the overvoltage protection assembly are realized; through the arrangement of the high-voltage circuit breaker or the electric isolation handcart, when the overvoltage protection assembly is detected to be abnormal, the connection between the overvoltage protection assembly and the high-voltage bus can be rapidly cut off, so that the system safety is ensured; the device integrates a transient fault recording function and can capture wave map data before and after a power frequency overvoltage fault of the system; the overvoltage protection assembly in the device adopts a geometric center air cooling heat dissipation mode, the fan is quick in starting response, the operating temperature of the overvoltage protection assembly is greatly reduced, the operating time of the overvoltage protection assembly can be effectively prolonged, and the device adopts an integrated modular structural design, so that the operation safety, the maintenance and the management are greatly facilitated.

Provided is an image forming apparatus including: an image forming unit configured to form an image on a recording material; an exhaust fan configured to exhaust air inside the image forming apparatus; a CPU configured to control rotation of the exhaust fan; and a memory configured to store in advance a first control setting value for rotating the exhaust fan at a first target rotation speed. The CPU rotates the exhaust fan based on the first control setting value, and permits the image forming unit to form an image when a rotation speed of the exhaust fan becomes equal to or faster than a lower limit rotation speed for suppressing a discharge amount of UFPs. When a predetermined time period has elapsed, the CPU performs feedback control for the exhaust fan such that the exhaust fan is rotated faster than the first target rotation speed.

The invention belongs to the technical field of energy storage cooling, and particularly relates to a cooling circulation system and an equipment cooling method, and the cooling circulation system comprises a liquid inlet system, a heat exchange system and a liquid outlet system. The heat exchange system comprises a plurality of heat exchange units which are connected in parallel; the liquid inlet system is connected with the input end of the heat exchange system, and a pressure detection device, a liquid temperature measurement device I, a pollution discharge degassing tank and a liquid circulation driving unit are connected into the liquid inlet system; the liquid outlet system is connected with the output end of the heat exchange system, and a conductivity detection device, an outlet pressure detection device and a liquid temperature measurement device II are connected into the liquid outlet system. Through dynamic modular adjustment, multi-parameter intelligent control, energy-saving composite heat dissipation and high-reliability design, the problems of low heat dissipation efficiency, high energy consumption, high maintenance cost, poor adaptability and the like in the prior art are effectively solved; and particularly, the method has remarkable advantages in the aspects of precise heat dissipation of high-power-density equipment, stable operation under complex working conditions and full-life-cycle cost control.

The embodiment of the invention discloses a high-voltage box heat dissipation control method, electronic equipment and a storage medium, and the method comprises the steps: determining a heat dissipation demand and related fan operation parameters based on the heating characteristics and working condition data of internal components of a high-voltage box; constructing a dynamic airflow model of an internal flow channel of the high-pressure tank, and optimizing a flow channel structure and airflow distribution of the high-pressure tank based on a fluidics principle; according to flow characteristics and structural strength requirements of the high-voltage box, hole opening parameters and a machining process are determined, and the high-voltage box is machined through the machining process according to the hole opening parameters; and verifying the heat dissipation effect of the processed high-voltage box through the constructed multi-physical field coupling model, generating a heat dissipation verification effect, and dynamically adjusting heat dissipation control parameters corresponding to the high-voltage box based on a heat dissipation verification result. According to the high-voltage box heat dissipation control scheme provided by the invention, the heat dissipation efficiency of the high-voltage box can be effectively improved, the reliability and safety of equipment operation are enhanced, and heat dissipation requirements under different working conditions are met.

The invention relates to a heat dissipation optimization method and system for an air conditioner control panel, and belongs to the technical field of energy-saving air conditioner heat dissipation. Comparing the real-time temperature data with a preset temperature threshold value, and determining a heat dissipation mode; when the real-time temperature data is lower than a first threshold value, a first-stage heat dissipation mode is started, a heat dissipation fan is controlled to operate at the lowest rotating speed, and a basic heat conduction path of a cooling fin is activated; when the real-time temperature data is between a first threshold value and a second threshold value, a second-stage heat dissipation mode is started, the rotating speed of a heat dissipation fan is adjusted to be in linear proportion to the real-time temperature data, and an expansion heat conduction path of a cooling fin is started to increase the heat dissipation area; and when the real-time temperature data exceeds a second threshold value, starting a three-stage heat dissipation mode, switching to phase change material auxiliary heat dissipation, controlling a heat dissipation fan to operate at the maximum rotating speed, dynamically adjusting the heat conduction efficiency of a heat dissipation sheet through a pulse width modulation signal, and triggering a temperature alarm signal.

The invention discloses a dynamic liquid cooling device of a communication case. The dynamic liquid cooling device comprises a control system, a case shell, a cold plate type liquid cooling system, a transmission mechanism and a gear synchronizing mechanism, n unit modules are installed in the case shell in an array mode, and temperature sensors are arranged on the unit modules. The cold plate type liquid cooling system comprises N cooling plates and N liquid cooling fixing frames, the liquid cooling fixing frames are installed on one sides of the unit modules, and the cooling plates are installed on the liquid cooling fixing frames; the transmission mechanism comprises a stepping motor, a transmission main shaft and N push plate assemblies which are matched with the N cooling plates one by one; the number of the gear synchronizing mechanisms is M, and the transmission main shaft can be connected with one or more push plate assemblies through the gear synchronizing mechanisms. The cooling plate has a dynamic position adjusting function, the distance between the cooling plate and a component can be automatically adjusted according to the temperature change of the unit module monitored by the temperature sensor in real time, the cooling intensity is automatically adjusted, energy waste is avoided, and the equipment can be kept to operate within the optimal temperature range through the optimized operation mode of the cooling plate.

An example cooling system includes a power source, a first pump cassette configured to circulate fluid through the cooling system, and a second pump cassette configured to circulate fluid through the cooling system. The first pump cassette is connected to the power source and includes a first inrush current limiter circuit and a first pump controller. The second pump cassette is also connected to the power source and includes a second inrush current limiter circuit and a second pump controller. The first inrush current limiter circuit is connected in series between the power source and the first pump controller, and the second inrush current limiter circuit is connected in series between the power source and the second pump controller.

The invention relates to the technical field of electric control cabinets, and discloses an efficient heat dissipation frequency converter electric control cabinet which comprises a bottom plate and a heat insulation plate. In the efficient heat dissipation frequency converter electric control cabinet, a lower low-temperature area accelerates the flow speed of airflow in an air inlet pipe through rotation of a first fan, efficient heat dissipation is achieved, and a second fan in a high-temperature area and the first fan on the top supply air upwards; the natural convection characteristic of hot air rising is used for accelerating hot air discharging, air cooling is started at the low temperature, cooling plate water cooling is automatically switched at the high temperature, and the energy-saving performance and the powerful cooling requirement are both considered. When a differential pressure sensor on the filter screen monitors abnormity, a threaded rod can be driven to rotate, a brush plate moves up and down to automatically clean the filter screen, a second fan rotates reversely to blow dust and impurities away from the filter screen, a mounting frame is pushed inwards, a clamping block in a sleeve and a first circular truncated cone are unlocked, and a spring arranged on the sleeve in a sleeving mode can push the mounting frame and a mounting plate to automatically slide. When the mounting frame is pushed inwards again, the clamping block in the sleeve is automatically locked with the circular truncated cone I, so that the maintenance operation of the electric control cabinet is more convenient.

The embodiment of the invention discloses a mobile terminal and a heat dissipation control method thereof, relates to the technical field of terminal equipment, and can give consideration to the heat dissipation performance and the conciseness and delicacy of the appearance of the mobile terminal. The mobile terminal comprises a shell, a display panel, a heating device, a heat dissipation device and an air duct. The shell comprises a fixed shell, a heat dissipation shell and a supporting cover plate, wherein the fixed shell and the heat dissipation shell are arranged on the non-display side of the display panel. The shell is provided with a plurality of first air inlets located in the heat dissipation shell and a plurality of air outlets located in the heat dissipation shell and / or the fixed shell. And the multiple first air inlets communicate with the multiple air outlets through the air duct. The heating device and the heat dissipation device are arranged in the air channel. The supporting cover plate is movably connected with the heat dissipation shell and / or the fixed shell and is switched between a closed state and an unfolded state. In the closed state, the supporting cover plate covers the heat dissipation shell and shields at least part of the first air inlets. In the unfolding state, the supporting cover plate supports the display panel to stand up and is moved away from at least part of the first air inlet.

The invention relates to the technical field of heat dissipation, in particular to a standing wave heat dissipation device and system, and the device comprises an active film and a passive film which are oppositely arranged. A standing wave cavity is arranged between the active film and the passive film. The cavity wall of the standing wave cavity is provided with an air flow hole channel. The active film and the passive film can vibrate in opposite directions at the same frequency, form standing waves in the standing wave cavity, continuously extrude gas in the cavity and present a surge state, so that the air in the standing wave cavity is continuously compressed and extruded from inside to outside to form an inside-outside pressure difference, and the gas in the standing wave cavity is repeatedly extruded to pass through the gas flow hole channel; and the air flow is jetted to the outside of the standing wave cavity at a high speed in a surge state to form a continuous constant high-speed air flow. When the standing wave heat dissipation device provided by the invention is used for heat dissipation, the active film and the passive film are subjected to reverse same-frequency vibration to form standing wave extrusion airflow, and compared with single vibration film vibration extrusion airflow, the airflow is faster, the efficiency is higher, and the heat dissipation effect is better.

The invention relates to the field of surgical mechanical arms, and discloses percutaneous interventional surgery efficient auxiliary equipment which comprises a mounting plate, a control box is fixedly connected to the top of the mounting plate, a mechanical arm body is fixedly mounted at the top of the control box, a transmission box is fixedly connected to the interior of the mounting plate, and a motor is fixedly connected to the bottom of the inner wall of the transmission box; the right side of the transmission box communicates with a round sleeve, and the right end of an output shaft of the motor is fixedly connected with fan blades located in the round sleeve. According to the invention, the controller detects the temperature in the control box and intelligently controls the motor at the same time, then the motor exhausts air through the fan blades and the exhaust pipe to cool the element, and finally the speed reducer and the reciprocating screw drive the sleeve plate to move up and down through the moving sleeve. The sliding rod drives the exhaust pipe to rotate back and forth within a certain angle through the arc-shaped opening, the heat dissipation area is increased, the advantage of intelligent heat dissipation is achieved, and the situation of local overheating is not prone to occurring.

The invention relates to the technical field of data center machine room energy conservation, and discloses a machine room cold channel closed management method and device and terminal device.The method comprises the following steps that the state of a cold channel is obtained by deploying environment monitoring nodes, a heat-flow coupling model and a stability function are constructed, a feedback controller is designed to generate an air door and refrigeration control instruction, and a heat-flow coupling model is established; linkage adjustment of the air velocity and the temperature is achieved, closed-loop control is constructed, and efficient and energy-saving management of a cold channel is achieved; the device comprises an environment monitoring module, a state modeling module, a stability evaluation module, a state feedback control module and an execution linkage module. Through state fusion updating, a component control structure, a stability function driving strategy and a linkage execution mechanism, fine adjustment and efficient cooperative control of the temperature and airflow of the cold channel are achieved, the adjustment stability and response efficiency are improved, energy consumption is remarkably reduced, and the problems that an existing system is poor in control precision, poor in linkage performance and the like are solved.

The disclosure relates to an apparatus for charging or discharging including a case, a charging or discharging module unit and an air treatment unit provided inside the case, an equipment temperature sensor located in the case and sensing an equipment temperature, a module hole formed by communicating with the outside, and a controller charging or discharging, where the controller is configured to discharge at least a portion of the air discharged from the air treatment unit to the outside of the case through the module hole based on usage current of the charging or discharging module unit and the equipment temperature, a battery charging or discharging system including the same, and a control method thereof.

A fan assembly includes a base with multiple layers with at least one layer formed from a relatively lightweight material to reduce the overall weight of the fan assembly. The base may include multiple metal layers and one or more core layers positioned between the metal layers. At least one of the core layers may include a PCB used to route electrical signals between components of the fan assembly and / or between components of an electronic device in which the fan assembly is positioned. Alternatively, at least one of the core layers may include a lightweight material (e.g., plastic) with a channel used to receive a flexible circuit. The base, having layers of different materials, may be lighter in weight as compared to a base consisting of a metal layer (or metal layers), while also substantially retaining flexural stiffness to counter against applied forces to the base.

The invention discloses an intelligent control system for a control cabinet of a laser cutting machine, which comprises a temperature prediction processing unit and a heat pipe network flow prediction module, and the heat pipe network flow prediction module is used for predicting heat flow distribution in the control cabinet; an airflow simulation unit; the collaborative optimization unit is used for combining output results of the temperature prediction processing unit and the airflow simulation unit to realize intelligent management of the temperature and the airflow in the control cabinet; and the control execution unit is used for adjusting a cooling system of the control cabinet according to an optimization result of the collaborative optimization unit so as to maintain the temperature in the control cabinet within a preset range. The intelligent control system of the laser cutting machine control cabinet has the following beneficial effects that the intelligent control system of the laser cutting machine control cabinet can effectively solve the thermal management problem of the laser cutting machine control cabinet, and meanwhile, the real-time performance, the accuracy and the energy efficiency of the system are considered.

The invention relates to the field of thermal management of electronic equipment, and discloses a heat dissipation control method and system for a set top box and a storage medium, and the method comprises the steps: firstly obtaining a hardware layout corresponding to the set top box, positioning an adaptive heat dissipation node, and collecting initial data; according to the operation temperature data flow, generating a temperature curve, extracting an overheating risk point, and calculating a heat dissipation urgency value to generate an adjusting instruction; analyzing an instruction execution effect, and calculating a heat dissipation risk value by means of an effect deviation vector; and finally, determining an adjustment mode in combination with an adaptive mechanism, and extracting core data to generate a heat dissipation control report. The heat dissipation stability of the set top box is improved.

The invention relates to the technical field of servers, and discloses a combined server convenient for computing power distribution, which comprises a cabinet, one side of the cabinet is connected with a split door assembly, and a folding partition plate assembly is mounted in the cabinet. According to the combined server convenient for computing power distribution, an innovative structure that the partition plates for placing the server are not fixedly mounted in the cabinet is realized, the multiple groups of partition plates can perform inclined stretching action by virtue of linkage matching of the hinged frame bodies, and compared with a vertical stacking mode in the prior art, the combined server convenient for computing power distribution has the advantages of simple structure and convenience in operation. According to the placement rack capable of being obliquely stretched, the internal heat dissipation efficiency of a cabinet is remarkably optimized, the vertical distance between two adjacent sets of servers is increased through the stretched placement rack, a traditional vertical alignment structure is broken through staggered layout, a three-dimensional channel facilitating air circulation of heat dissipation equipment is formed, the heat dissipation rate is increased, and meanwhile, the heat dissipation efficiency is improved. And the stretched folding partition plate assembly cannot shield the overhaul sight, so that maintenance personnel can conveniently and quickly inspect the equipment.

The invention provides a terminal security management system and management method, and relates to the technical field of security engineering. The terminal security management system comprises a hardware facility and a control end, the hardware facility comprises a control cabinet and a plurality of terminal devices installed in the control cabinet, the control cabinet is provided with an exhaust mechanism, the exhaust mechanism comprises an air outlet box, the two sides of the air outlet box are communicated with flow guide pieces, air channels are formed in the flow guide pieces, and the air channels are communicated with the air outlet box. The local part of the air channel is provided with a folding section, the inner side, facing the control cabinet, of the flow guide part is provided with a flow guide opening, and the flow guide opening is located between the two adjacent terminal devices; and an air inlet mechanism communicated with the flow guide part is arranged at the bottom in the control cabinet, a flow equalizing part is rotationally arranged in the air inlet mechanism, air is sucked from one side, facing the terminal equipment, of the flow guide part through a furling section on the air channel and a corresponding drainage opening by utilizing the Venturi effect, and heat energy at the position of the terminal equipment is dissipated.

The invention discloses a wireless charging device with temperature control, which comprises a surface shell, a bottom shell, a temperature adjusting module, a wireless charging module and a magnet assembly, and is characterized in that the surface shell is mounted on the bottom shell, a cavity is formed between the surface shell and the bottom shell, and the temperature adjusting module and the wireless charging module are mounted in the cavity; the temperature adjusting module is electrically connected with the wireless charging module. When the charging device main body is used, a mobile phone is placed on the surface shell, the magnetic attraction area surface can attract the mobile phone, the wireless charging module wirelessly charges the mobile phone, then the wireless charging module emits heat, and after the temperature adjusting module is started, heat in the cavity is discharged outwards. And meanwhile, external air enters the cavity through the surface shell, so that the temperature in the charging device main body is lower than the temperature of the mobile phone, heat generated by working in the charging device main body is prevented from being conducted to electronic equipment such as the mobile phone, the refrigeration effect is achieved, and charging use is facilitated.

The invention relates to the technical field of wireless charging temperature control, in particular to a self-adaptive intelligent temperature control method and a refrigeration wireless charger. According to the method, the inherent heating tendency of the mobile equipment is quantified through the charging initial data, the heating index is obtained, the basic temperature threshold interval is obtained according to the heating index, and the charging environment data is introduced to intervene in the obtaining of the personalized temperature threshold in real time; the method solves the problem of unreasonable threshold setting caused by the difference of batteries of new and old equipment and the difference of heating characteristics of different models, then, by capturing charging process data of mobile equipment and combining threshold judgment, early warning and refrigeration triggering can be carried out in the early stage of abnormity, and the charging efficiency of the mobile equipment is improved. The emergency degree of the current refrigeration demand can be accurately described by analyzing the temperature control demand intensity value calculated by the charging process data, and the accurate temperature control adjustment parameters are dynamically generated in combination with the preset control parameter group of the refrigeration wireless charger, so that the charging and refrigeration assembly is directly controlled, and the temperature control response speed is favorably improved.

The invention relates to the technical field of intelligent cabinet management, in particular to a comprehensive power management and cooling optimization method and system for an intelligent cabinet. The invention discloses a comprehensive power management and cooling optimization system for an intelligent cabinet. The comprehensive power management and cooling optimization system comprises a data acquisition module, a state prediction module, a micro fan control strategy adjustment module and a micro fan control strategy adjustment model updating module. Effectiveness of the miniature fan is fed back in time through the temperature sensor, the corresponding miniature fan control strategy is set based on the predicted electric load condition and temperature condition, and performance parameters of the miniature fan are adjusted in time through the miniature fan control strategy; in the process of predicting the power load condition and the temperature condition, query vectors are constructed on the basis of the temperature feature map and the power load feature map, and the accuracy of power load prediction and temperature prediction is improved through the corresponding relation between the temperature feature map and the power load feature map.

The invention provides a heat dissipation control method and system for a network control cabinet, and belongs to the field of heat dissipation control, and the method comprises the steps: building a correlation model of the load and temperature of the network control cabinet according to the historical load of the network control cabinet and the corresponding historical temperature data, obtaining the current load data of the network control cabinet, inputting the load data into the correlation model to obtain a future temperature change trend of the network control cabinet; determining a heat dissipation control instruction according to the temperature change trend and a dynamic threshold value of the network control cabinet; and controlling heat dissipation equipment of the network control cabinet to dissipate heat of the network control cabinet according to the heat dissipation control instruction. According to the heat dissipation control method and system for the network control cabinet, the temperature trend of the network control cabinet can be predicted in advance according to the historical load data and the temperature data, countermeasures are accurately taken according to the temperature trend, the heat dissipation state of the network control cabinet is controlled in real time, and the stability of the network control cabinet is improved.

The invention discloses a power cable traveling wave fault detecting and positioning device and a using method thereof.The power cable traveling wave fault detecting and positioning device comprises a cable, a first fixing sleeve and a second fixing sleeve are fixedly installed on the cable, a shell is fixedly installed on the first fixing sleeve and the second fixing sleeve, the cable penetrates through the shell, and the power cable traveling wave fault detecting and positioning device further comprises a dehumidifying mechanism, and the dehumidifying mechanism comprises a mounting frame fixedly mounted in the shell, a water leakage groove is formed in the shell, the cable is rotationally sleeved with a transmission hollow rod, and the right end of the transmission hollow rod is rotationally connected with a first fixing sleeve. According to the invention, after the transmission rod leaves the trapezoidal plate, the extrusion filter plate is driven to leave the water absorption sponge under the elastic force action of the dehumidification spring, so that the reciprocating extrusion filter plate continuously extrudes the water absorption sponge to ensure that the water absorption sponge cannot normally dehumidify due to excessive moisture, thereby affecting the fault of electronic components in the shell; therefore, the device cannot work normally.

The invention relates to the technical field of information engineering communication, in particular to an electronic communication device for information engineering, which comprises a communication box and a controller, and is characterized in that the bottom of the communication box is fixedly connected with a base; an equipment bracket and a first driving piece are fixedly connected to the inner bottom wall of the communication box, and the controller is used for controlling an output shaft of the first driving piece to rotate; a U-shaped frame is fixedly connected to the inner side wall of the communication box, a lead screw is rotationally matched in the U-shaped frame, and the bottom end of the lead screw is coaxially and fixedly connected with the first gear. A nut seat is in threaded fit with the lead screw, the nut seat is in vertical sliding fit with the inner side of the U-shaped frame, a second driving part is fixedly connected to the nut seat, and fan blades are coaxially and fixedly connected to an output shaft of the second driving part; an air inlet pipe and an air outlet pipe are symmetrically and respectively communicated with the side wall of the communication box; a circular plate is rotationally matched in the air inlet pipe; an adjusting assembly used for controlling the opening and closing angle of the circular plate is arranged on the inner bottom wall of the communication box. The heat dissipation and ventilation path and the air volume can be dynamically adjusted according to the running state of the equipment in the communication box.

A double-air-duct laser radar heat dissipation structure includes a radar box body, a first and a second heat dissipation portion. The first heat dissipation portion for heat dissipation of a high-speed acquisition module comprises two air duct structures and an air duct switching mechanism. When an unmanned aerial vehicle works, a first air duct improves heat dissipation of a radar system through an air flow generated by the unmanned aerial vehicle; after landing, the air duct switching mechanism disconnects the first air duct and connects a second air duct to a heat dissipation system to meet heat dissipation of a laser radar in a data processing stage. The second heat dissipation portion completes heat dissipation of a laser device through TEC refrigeration and a heat sink. The present disclosure reduces energy consumption and makes the radar adapt to various working conditions while improving the heat dissipation.

A fan speed control method performing by a baseboard management controller includes following steps: obtaining a first temperature from a first temperature sensor, determining a first rotational speed according to the first temperature and a proportional-integral-derivative (PID) equation, wherein a proportional term of the PID equation is:∫0 tf⁡(E⁢V⁡(t),p) [EV′(t)]2⁢d⁢t-∫0 t-Δ⁢tf⁡(E⁢V⁡(t-Δ⁢t),p) [EV′(t-Δ⁢t)]2⁢dt;where t denotes time, Δt denotes an interval time, EV(t) denotes an error between the first temperature and a set temperature when the time is t, EV′(t) denotes a first derivative of EV(t), ƒ(EV(t),p) denotes a coefficient of the proportional term, and controlling said at least one fan according to said at least the first rotational speed.