6642 results about "Computer fan" patented technology

The invention discloses an energy storage battery pack equalization control method, which belongs to the field of energy storage battery packs, and comprises the following steps: S1, constructing a multi-physics field-aging coupling model; s2, based on a multi-physical field-aging coupling model, space-time-frequency domain joint state estimation and unbalanced pattern recognition are realized; s3, formulating optimal equalization topology and control parameters according to space-time-frequency domain joint state estimation and an unbalanced mode recognition result; s4, establishing an electric-thermal-fluid multi-physics field coupling control model, and optimizing equalization current regulation and control, liquid cooling flow velocity and cooling fan rotating speed based on the optimal equalization topology and control parameters; and S5, optimizing the full life cycle of the digital twin drive. By adopting the equalization control method for the energy storage battery pack, the efficient coordination of the energy storage battery pack from dynamic modeling, accurate state estimation and intelligent equalization decision to full life cycle management is realized, and the equalization efficiency and the system reliability are remarkably improved.

The invention relates to an anti-electromagnetic interference intelligent cooling fan system based on dynamic filter circuit design. The system comprises a dual analysis module used for performing time domain and frequency domain dual analysis on a rotating speed feedback signal of a double-ball fan to obtain a multi-dimensional electromagnetic interference characteristic model, and configuring filter network parameters to obtain a target three-stage cascade dynamic filter network; the signal purification module is used for collecting first fan operation parameters and inputting the first fan operation parameters into a target three-stage cascade dynamic filter network for signal purification to obtain filtered Hall sensor signals and filtered power supply signals; the closed-loop control calculation module is used for performing closed-loop control calculation to obtain a non-linear PWM duty ratio control quantity and a phase distribution parameter; and the phase difference control module is used for carrying out phase difference control to obtain a multi-fan cooperative control strategy. According to the invention, high-precision control and anti-interference capability in a wide rotating speed range are realized, and the problem of mutual influence of electromagnetic interference when multiple fans are connected in parallel is solved.

The utility model discloses a smoothie machine with a vertically-arranged air duct structure, which comprises an upper machine shell and a lower machine shell which are arranged up and down, an evaporator assembly, a cooling fan assembly and a condenser are arranged in the upper machine shell, and an air duct area of the smoothie machine is defined by the upper machine shell, the evaporator assembly and the cooling fan assembly. An air inlet and an air outlet which are communicated with the air duct area are formed in the upper machine shell, and the condenser is arranged at the air outlet; the compressor assembly of the smoothie machine is arranged in the lower machine shell. On one hand, the positions of the evaporator assembly, the cooling fan assembly, the condenser, the compressor and other main components of the smoothie machine are optimized, the vertical layout structure that the evaporator assembly, the cooling fan assembly and the condenser are located on the upper portion of the machine body, and the compressor and other assemblies are located on the lower portion of the machine body is shown, and the relatively compact structure is formed; and the space utilization rate of the machine body is improved, so that the size of the whole machine of electrical products applying the smoothie machine is smaller and more exquisite.

The invention discloses an electrical automatic control method and system. The method comprises the following steps: acquiring temperature data and load current data in an electrical cabinet; denoising the temperature data by adopting a wavelet transform algorithm; filtering the load current data by adopting a Kalman filtering algorithm; establishing a temperature rise compensation model based on a long short-term memory (LSTM) neural network, wherein the output of the temperature rise compensation model is a temperature rise predicted value in the electrical cabinet; setting a multi-objective function of temperature rise control in the electrical cabinet; solving by adopting a multi-target ant colony algorithm to obtain an optimal control strategy of the cooling fan; and starting, stopping and speed adjustment of the cooling fan are controlled according to the optimal control strategy of the cooling fan. Aiming at frequent starting and stopping of a cooling fan of an electrical cabinet in the prior art, a temperature rise compensation model is established based on a long short-term memory (LSTM) neural network, a multi-objective optimization function including temperature rise deviation and starting and stopping times of the cooling fan is set, an improved multi-objective ant colony algorithm is adopted for solving, and starting and stopping of the cooling fan are reduced.

The invention discloses an energy efficiency control method for a cooling fan of an industrial electric cabinet, and the method comprises the steps: firstly collecting temperature, humidity, equipment current / voltage and other multi-mode sensing data, carrying out the PCA algorithm dimension reduction and feature extraction, combining with Granger causality test, thermodynamic principle and machine learning algorithm, and carrying out the building and fusion, thereby obtaining a cooling efficiency model. Thirdly, preprocessing current and voltage data of the equipment, training and optimizing an LSTM model to predict load power, and calculating a fan rotating speed control value through a heat dissipation efficiency model; then, a PWM speed regulation signal is generated by adopting a fuzzy PID control algorithm, and a pulse width modulation and smooth speed regulation mixed strategy is applied to the duty ratio; and finally, energy efficiency indexes are collected to compare and update the weight of the LSTM model, knowledge distillation is introduced to optimize new model training, and self-adaptive adjustment of the rotating speed of the fan is achieved. The rotating speed of the fan can be accurately adjusted, energy consumption is reduced, the energy utilization efficiency is improved, performance reduction of equipment due to overheating is effectively avoided, and the service life of the equipment is prolonged.

The invention relates to the technical field of heat dissipation control, and discloses a heat dissipation fan multi-order filtering control method and device, and the method comprises the steps: collecting the operation parameters of a multi-fan heat dissipation system, and carrying out the construction of a dynamic state space model, and obtaining a system operation state equation and a temperature observation equation; inputting the system operation state equation and the temperature observation equation into an expectation maximization sliding window iteration extended Kalman filter to obtain a system state estimation value and a prediction error covariance matrix; performing three-stage series design on the cut-off frequency of the low-pass filter, the passband range of the band-pass filter and the coefficient of the adaptive filter to obtain a system multi-order filtering control model; based on a system multi-order filtering control model, an airflow coupling influence coefficient matrix among multiple fans is calculated, the total energy consumption, the noise level and the heat dissipation efficiency are subjected to optimization solution, a fan control optimization parameter set is obtained, the heat dissipation efficiency is guaranteed while the energy consumption is reduced, and dynamic balance among all control units is achieved.

Disclosed in the present application are a server, and an aerodynamic-noise and heat-dissipation optimization control system therefor. The system comprises a heat dissipation fan, a temperature measurement module, a noise measurement module, a power consumption measurement module, a controller and a phase-change air guide cover, wherein the aerodynamic area of the heat dissipation fan is adjustable; the temperature measurement module is used for measuring the temperature of a case; the noise measurement module is used for measuring the noise inside the case; the power consumption measurement module is used for acquiring a load requirement of a program currently running in a server; and the controller is used for adjusting the working condition of the heat dissipation fan, analyzing the lowest operating power of each server assembly on the basis of the load requirement when internal noise reaches a preset threshold value, and adjusting the current power of each server assembly on the basis of the lowest operating power. The phase-change air guide cover is used for guiding air and absorbing heat by means of a phase-change material.

The invention relates to the technical field of energy storage, in particular to an energy storage converter which comprises a shell, the shell is provided with a first containing cavity, a second containing cavity and a third containing cavity which are distributed in the first direction, the first containing cavity is provided with an inductor, a radiator and a first cooling fan, and the second containing cavity is provided with a high-voltage box, a power device and a heating electronic device; the third accommodating cavity is provided with a control board, an anti-interference board and a power board; a first partition plate and a second partition plate which are distributed in a spaced mode in the second direction are arranged between the first containing cavity and the second containing cavity, the first partition plate can support the high-voltage box, and the second partition plate can support the heating electronic device; along a second direction, the power device is arranged between the first partition plate and the second partition plate, and the second direction is perpendicular to the first direction; a first supporting plate is arranged between the second containing cavity and the third containing cavity and supports the control plate, the anti-interference plate and the power panel. The energy storage converter is high in space utilization rate, small in size and high in operation stability.

The invention relates to the technical field of motor control, and discloses a cooperative control method and system for a high-speed motor with multiple cooling fans. The method comprises the steps that multi-dimensional data collection and standardization processing are conducted on each cooling fan unit in a target cooling system, a system state data matrix is obtained, and the target cooling system comprises a main cooling fan and a plurality of auxiliary cooling fans; performing discrete rotating speed response to obtain a continuous rotating speed control strategy; performing multi-dimensional dynamic feature extraction to obtain a system operation feature vector, and performing state feedback equation solution to obtain a mapping relation matrix; inputting a target control model for control parameter analysis to obtain an initial control sequence; inputting a dual Q network model to carry out master-slave fan control correction to obtain a control correction amount; according to the multi-cooling-fan cooperative control method and the multi-cooling-fan cooperative control system, cooperative control of the multiple cooling fans is achieved, and control conflicts are effectively avoided.

The invention relates to the technical field of automatic detection data processing, in particular to a cooling fan automatic detection cleaning system which comprises an electromagnetic compatibility strengthening sensing module, a multi-physical field feature decoupling module, a layered fault diagnosis module, a dynamic cleaning strategy generation module, an anti-corona cleaning execution module and a closed loop feedback optimization module. Temperature field distribution, mechanical vibration signals and partial discharge characteristics are collected in real time through a distributed sensing network and are subjected to tensor fusion with SVG operation parameters to generate a multi-physical field joint characteristic space, and a closed-loop feedback module associates cleaning efficiency data with fault characteristics, reversely corrects model parameters and optimizes a cleaning strategy. According to the invention, traditional threshold limitation is broken through, and closed-loop control of electromagnetic interference suppression, unknown fault dynamic diagnosis and cleaning accurate response is realized.

The invention relates to the technical field of motors, and provides a multi-cooling permanent magnet synchronous variable frequency motor which comprises a shell, a stator and a rotor and further comprises a plurality of cooling fins, a cooling fan, a water cooling mechanism and a driving mechanism, the cooling fins are fixedly connected to the outer portion of the shell, the cooling fan is coaxially and fixedly connected with the rotor, and the water cooling mechanism is fixedly connected with the stator. An air outlet is formed in the shell, the water cooling mechanism is used for conducting water cooling on the shell and comprises a cold water pipe and a heat dissipation pipe network, the cold water pipe penetrates through the multiple cooling fins, the top of the heat dissipation pipe network communicates with the top of the cold water pipe through a water supply pipe, and the bottom of the heat dissipation pipe network communicates with the bottom of the cold water pipe through a water return pipe; the heat dissipation pipe network is located outside the shell and corresponds to the air outlet in position, and the driving mechanism is used for driving cold water to circularly flow in the cold water pipe and the heat dissipation pipe network. By means of the technical scheme, the problem that in the prior art, a single cooling mode is limited in cooling effect is solved.

The invention relates to the technical field of electric energy meters, and provides a temperature-controllable electric energy meter and method, a box body is internally provided with a positive-pressure heat dissipation mechanism, the positive-pressure heat dissipation mechanism comprises an air inlet pipe, the air inlet pipe is arranged in the box body and located below an electric energy metering module, one end of the air inlet pipe is closed, and the other end of the air inlet pipe penetrates through the side wall of the box body and is communicated with the outside; the mounting box covers the air inlet pipe, a plurality of cooling fans are arranged in the mounting box, and the cooling fans are used for sucking air flow in the air inlet pipe and discharging the air flow through the air outlet; the shielding part is arranged at the top of the box body and used for blocking the exhaust port, the shielding part is used for forming a positive pressure environment in the box body, and the shielding part can be opened when the internal pressure of the box body is larger than preset pressure so that gas in the box body can be exhausted through the exhaust port. Through cooperation of the positive pressure heat dissipation mechanism and the shielding piece, a dynamic positive pressure environment is constructed in the box body, external dusty air can be prevented from invading through gaps or heat dissipation holes from the source, and the problem of dust accumulation caused by heat dissipation of a traditional electric energy meter is thoroughly solved.

The invention relates to the technical field of high-speed motor intelligent control, and discloses a high-speed motor intelligent control method and device for a cooling fan, and the method comprises the steps: carrying out the parameter collection of a high-speed fan motor, and obtaining a motor basic parameter group; performing motor overmodulation boundary calculation to obtain a linear PWM region threshold value and an overmodulation region threshold value; performing multi-objective optimization operation on the voltage distortion degree, the current harmonic quantity and the system loss to obtain an initial control parameter group; performing current harmonic analysis to obtain a current harmonic compensation value and a system delay compensation value; performing online state evaluation operation to obtain a PWM control parameter correction value, a current controller parameter correction value and a voltage vector distribution correction value; and performing fault feature analysis on the running state of the high-speed fan motor, and outputting a fault phase isolation instruction and a fault-tolerant control instruction, thereby improving the overall running effect of the high-speed fan motor.

The invention belongs to the technical field of heat dissipation of electronic equipment, and particularly discloses an efficient heat dissipation assembly and electronic equipment, the heat dissipation assembly comprises a heat dissipation substrate tightly attached to the surface of a heating element, a vapor chamber is tightly attached to the face, away from the heating element, of the heat dissipation substrate, and heat dissipation fins and a heat dissipation fan are sequentially connected to the face, away from the heat dissipation substrate, of the vapor chamber; the vapor chamber comprises a shell, a cover plate and a liquid absorbing core, the cover plate is sealed on the shell, a vacuum cavity is formed in the cover plate, the vacuum cavity is filled with a two-phase fluid working medium, the liquid absorbing core is arranged in the vacuum cavity, the upper surface and the lower surface of the liquid absorbing core are tightly attached to the cover plate and the shell respectively, and a plurality of hollow steam cavities are formed in the liquid absorbing core. The electronic equipment comprises the efficient heat dissipation assembly. Through the synergistic effect of the heat dissipation substrate tightly attached to the heating element, the vapor chamber containing the two-phase fluid working medium and the multiple layers of heat dissipation fins, the structure compactness is guaranteed, and meanwhile efficient heat conduction and rapid heat dissipation are achieved.

The invention relates to the technical field of electricity meters, and particularly discloses a relay and an electricity meter thereof, comprising a mounting plate: a clamping frame is fixedly mounted on the front surface of the mounting plate, sliding grooves are formed in the upper and lower ends of the clamping frame, sliding plates are slidably connected to the inner sides of the sliding grooves, and heat dissipation fins of a heat conduction aluminum plate are attached to electronic components in the electricity meter. The n-pentane heat-conducting medium in the liquid storage box is heated and vaporized, the heat is absorbed, the heat dissipation capability is improved, the heat pushes the air cylinder to open the heat dissipation window, the air velocity in the electric meter is improved, the heat dissipation is enhanced, the temperature is continuously increased, and the heat-conducting medium is further vaporized, so that the inner current-conducting plate and the outer current-conducting plate are attached; and after the temperature is reduced, the heat-conducting medium is condensed, the air cylinder shrinks to block the heat dissipation window, the heat dissipation fan does not need to be automatically triggered by a temperature sensor, the consumption is reduced, the stability is improved, the cost is reduced, and the protection and moisture-proof performance is improved by the blocking window when the heat dissipation device is not used.

The invention relates to the technical field of motor heat dissipation, and discloses a lightweight motor heat dissipation structure, which comprises a shell, a stator structure, a rotor structure and a heat dissipation fan, cooling oil in the liquid storage tank is guided into the annular guide groove, the multiple sets of vortex grooves are diffused to the outside in a vortex mode, the cooling oil can be sprayed out to the turbofan blades at the inner diameter position in an accelerated mode through the conical liquid outlet holes in the inner wall of the annular guide groove, and therefore the turbofan blades at the lower portion can conduct vortex rotation; the introduced cooling oil can quickly flow from one side of the stator structure to the other side along the coil gap, so that the flow speed of the cooling oil in the inner cavity of the shell can be accelerated from one side of the stator structure, and the cooling and heat exchange efficiency of the compact coil in the stator structure is improved; the turbofan blades and the vortex grooves can enable cooling oil liquid to be diffused in a vortex mode to flow in the same direction with a rotating shaft in the rotor structure, and therefore the situation that the cooling oil liquid is guided into an inner cavity of the machine shell and influences the rotating speed of the rotor structure is avoided.

The invention belongs to the technical field of integrated circuits, and particularly relates to a speed regulation driving and anomaly detection circuit of a cooling fan. 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, so that the speed of the fan is regulated; and the sampling detection module is connected with the logic control module and the VIN port of the LDO, samples the current of the fan through a sampling resistor, converts the current into a voltage V0, compares the voltage V0 with a reference voltage Vref, and outputs a voltage signal to the level shift circuit. The speed-adjustable fan driving circuit is integrated, detection of various abnormal states of the fan is achieved, and the speed-adjustable fan driving circuit has the outstanding advantages of being simple in PCB layout and low in cost.

The utility model provides a transformer-based heat dissipation shell, which relates to the technical field of transformer shells and comprises a shell, a shell cover is mounted on the upper surface of the shell, a mounting hole is formed in the surface of the shell cover in a penetrating manner, a heat dissipation fan is mounted in the mounting hole, and a plurality of heat dissipation fins are arranged on the surfaces of the two sides of the shell at equal intervals. The screw rod is driven to rotate through the output end of the servo motor, meanwhile, the screw rod is made to move in the middle of the screw rod in a threaded sleeve mode, meanwhile, the screw rod can move as a guide plate, the dust screen is arranged between the inner walls of the observation openings, and the dust screen is arranged between the inner walls of the observation openings. When the guide plate moves, the guide plate drives the connecting rod and the moving plate to move at the same time, and meanwhile, the scraping plate and the brush are attached to the surfaces of the heat dissipation fins and the dustproof net to slide, so that dust on the surfaces of the heat dissipation fins and the dustproof net is cleaned, and the heat dissipation efficiency is improved.

The invention relates to the technical field of servers, and discloses a fan module and a server, and the fan module comprises a module main body which comprises a cooling fan; a first connector is arranged on the mounting seat; the mounting seat is connected to the module main body through the movable connecting structure and can move along the plugging direction of the first connector; and the elastic piece is supported between the module main body and the mounting seat. When the butt joint gap between the first connector and the second connector between the server is large, the elastic piece can push the mounting base to move towards the second connector based on the elastic force characteristic of the elastic piece and deepen the engagement between the first connector and the second connector. The problems that a connector of a fan module is prone to being insufficient in contact area with a connector of a server, the through-current capacity of the connector is reduced, local accumulated temperature is generated, even terminals of the connector are possibly melted down due to high temperature, system overheating downtime is caused, and potential safety hazards exist are solved.

The invention provides head-mounted equipment. The head-mounted equipment comprises a shell, a heat source device, a radiator and a cooling fan, an accommodating space is formed in the shell; the heat source device is arranged in the accommodating space; one side of the radiator is connected with the heat source device, and the other side of the radiator is connected with the shell through a heat-conducting medium; an air outlet of the cooling fan corresponds to the radiator and is used for taking away heat around the radiator through airflow. According to the head-mounted device provided by the embodiment of the invention, through two combined heat dissipation modes of connecting the radiator with the shell and blowing away the heat around the radiator by using the heat dissipation fan, the heat dissipation efficiency can be greatly improved, heat accumulation in the head-mounted device can be well solved, the rotating speed of the fan can be improved, and better man-machine temperature rise and noise experience can be achieved.

The invention discloses an excavator heat dissipation control method and system based on environment temperature and operation working conditions. The excavator heat dissipation control method comprises the steps that S1, the operation working conditions of an excavator are divided into five working conditions including the super-heavy load working condition, the heavy load working condition, the medium load working condition, the light load working condition and the super-light load working condition; s2, the external environment temperature is divided into 10 gears; s3, according to the environment temperature and the operation working condition, the heat dissipation requirement is divided into 10 gears; s4, the rotating speed of the cooling fan is adjusted according to the cooling requirement gear, so that the cooling requirement is accurately matched with the rotating speed of the cooling fan; and S5, whether the temperature of the working medium in the excavator is larger than a high-temperature threshold value or not is judged, if yes, heat dissipation is conducted according to the corresponding heat dissipation fan rotating speed obtained through the heat balance test, and if not, heat dissipation is conducted according to the actual heat dissipation requirement gear standard. The problem of heat dissipation redundancy caused by single parameter control is solved, and dynamic matching of the rotating speed of the fan and the composite heat dissipation requirement is achieved. And the energy consumption under the low-load working condition and the cold environment is reduced, and the risk of insufficient heat dissipation under the high-temperature heavy-load working condition is avoided.

The invention discloses an intelligent heat dissipation control method and system of a photovoltaic inverter, and relates to the technical field of heat dissipation control of photovoltaic inverters, and the method comprises the following steps: collecting the temperature of parts in the photovoltaic inverter and the temperature of the environment in the photovoltaic inverter through a temperature sensor, collecting an internal thermal imaging image, and carrying out the first screening processing; establishing a thermal imaging temperature correction model; performing temperature correction processing on the thermal imaging image in the photovoltaic inverter to obtain corrected thermal imaging temperature data; dynamically controlling a cooling fan of the photovoltaic inverter; the method is used for solving the problems that when heat dissipation control is carried out by measuring the internal temperature of the photovoltaic inverter in an existing photovoltaic inverter heat dissipation control technology, error correction cannot be carried out on a thermal imaging image through the thermal imaging image and a temperature sensor, accurate internal overall temperature information of the photovoltaic inverter cannot be obtained, and then heat dissipation control cannot be carried out.

An air cooling system for electronic devices includes a body, a thermal conduction component, and a heat dissipation fan. The body has a heat dissipation port and air inlet ports. The air inlet ports are disposed at a first housing part and a second housing part of the body. The first housing part is opposite to the second housing part. The thermal conduction component is disposed in the body and configured to contact a heat source. The heat dissipation fan is disposed in the body. The heat dissipation fan includes a first axial air inlet opening, a second axial air inlet opening, and radial air outlet openings. The first axial air inlet opening corresponds to one of the air inlet ports of the first housing part. The second axial air inlet opening corresponds to one of the air inlet ports of the second housing part.

The invention discloses a heat dissipation method of a server, electronic equipment, a computer storage medium and a product, and relates to the technical field of server heat dissipation, and the heat dissipation method of the server predicts multiple temperatures of the server in a future time domain based on a heat dissipation prediction model, and then constructs a target function in combination with a preset optimization function after adaptive weight update, and determining the target rotating speed of the current control period by optimizing and solving the target function, wherein the target rotating speed is used for controlling the cooling fan of the server. Therefore, according to the method, the heat dissipation of the server is controlled by adopting a model prediction control algorithm, the target rotating speed is determined by predicting future behaviors of the system, the problem of temperature regulation lag in related technologies is solved, and meanwhile, real-time adaptive adjustment is performed on the weight coefficient of the preset optimization function based on the actual temperature and the target temperature, so that the control accuracy is improved. Optimization of multiple targets such as temperature and energy consumption can be achieved, and the temperature control effect is further improved.

The invention discloses a control method and system for a vehicle cooling fan, a computer readable storage medium and a program product in the technical field of vehicle engine cooling. The technical problem that a vehicle without an ECU lacks a fan control method matched with the cooling requirement in real time is solved. The system comprises a fan controller used for obtaining start-stop signals or temperature of vehicle parts; according to the start-stop signal or the temperature of the vehicle part, a plurality of fan rotating speed control schemes are formulated in parallel; aligning the control schemes of the rotating speeds of the plurality of fans in time, selecting an optimal heat dissipation efficiency scheme from the control schemes of the rotating speeds of the plurality of fans in real time, and controlling the rotating speeds of the fans according to the optimal heat dissipation efficiency scheme; according to the control method and system for the vehicle cooling fan, real-time matching between the cooling efficiency of the fan and the cooling requirements of all parts of the vehicle is achieved, the calculated amount is low, and the control method and system can be executed on the fan controller without depending on an engine ECU.

Disclosed in the present utility model is a new electric motor structure, comprising a unit, an electric motor controller and a support, wherein the unit comprises an electric motor housing, a stator assembly, a rotor assembly, a rotating shaft, a first fan and an air guide cover; the first fan is installed at a rear shaft extension end of the rotating shaft; the air guide cover is installed outside of the first fan, and has an air intake hole; the electric motor controller comprises a control circuit board, a heat sink, high-speed cooling fans and a shell; a high-power chip on the control circuit board is attached to a top plate of the heat sink; several cooling fins arranged at intervals are provided below the top plate of the heat sink; the cooling fins are arranged in an axial direction; the high-speed cooling fans are installed on one side of the heat sink; high-power capacitors extending from the control circuit board are located on the other side of the heat sink; and several air output holes are formed in a front side face of the shell. During low-rotational-speed operation, the high-speed cooling fans are used for providing sufficient air pressure, such that the temperature rise of the whole machine is not excessively high in harsh use environments, thereby prolonging the service life of the whole machine.

The invention relates to the technical field of electronic equipment, and discloses a piezoelectric cooling fan which comprises a piezoelectric element, a vibration plate, a supporting frame, a jet flow plate and an air outlet plate. The supporting frame is provided with a cavity with the two sides open in the first direction. The vibration plate and the jet flow plate are arranged on the two sides, in the first direction, of the cavity in a covering mode respectively and connected with the supporting frame, and jet flow holes are formed in the jet flow plate. The piezoelectric element is attached to the side, away from the cavity in the first direction, of the vibrating plate and / or the side, away from the cavity in the first direction, of the jet plate, a center hole is formed in the piezoelectric element, and the air outlet plates are arranged on the side, away from the cavity in the first direction, of the jet plate at intervals. The air outlet plate is provided with air outlet holes communicated with the jet flow holes. According to the piezoelectric cooling fan, fatigue cracks caused by long-time use of the piezoelectric element can be avoided, and the service life of a product is greatly prolonged.

The invention discloses an easy-to-maintain power distribution cabinet fault alarm device, and relates to the technical field of power distribution cabinets, the easy-to-maintain power distribution cabinet fault alarm device comprises a protection mechanism and a power-off protector installed in the protection mechanism, the bottom of the protection mechanism is provided with a power distribution cabinet mechanism, and cooling fans are symmetrically installed on the two sides of the interior of the power distribution cabinet mechanism. The protection mechanism comprises a lifting sleeve, a telescopic sliding rod is fixedly installed in the lifting sleeve, the outer side of the telescopic sliding rod is slidably connected with a telescopic spring, the top of the telescopic spring is fixedly connected with a telescopic protruding block, the telescopic protruding block is fixedly connected with the telescopic sliding rod, and two second protection sliding plates are oppositely attached to each other, so that the telescopic sliding rod is fixedly connected with the telescopic protruding block. The top of the heat dissipation box is protected, the power-off protectors make contact with one another, rotation of the heat dissipation fan is stopped, the protection sleeve on the top of the protection ceiling moves downwards, rainwater is prevented from entering the interior of the distribution box body, and safety protection of components in the distribution box body is facilitated.

The invention relates to the technical field of network data analysis, and discloses a computer-based network data analysis device which comprises a case cabinet, a water-cooling heat dissipation mechanism extending into the case cabinet is installed on the back face of the case cabinet, a large server body is attached to the water-cooling heat dissipation mechanism, and a heat dissipation groove is formed in the side face of the case cabinet. An installation box is fixed to the top of the case cabinet, a cooling fan is fixedly installed in the installation box, a dust filter screen is fixedly installed at an inlet of the installation box, an exhaust pipe is fixedly connected to an outlet of the installation box, and an air cooling heat dissipation mechanism inserted into the case cabinet and facing the large server body is connected to the exhaust pipe. The exhaust pipe is further connected with a dust cleaning mechanism used for cleaning the dust filter screen. Water cooling and air cooling are combined, so that the heat dissipation effect is better; and dust in heat dissipation airflow can be filtered conveniently, accumulated dust can be cleaned conveniently, and use is convenient.