324 results about "Natural ventilation" patented technology

The invention discloses a multi-modal fusion exhibition building tall atrium natural ventilation evaluation method. The method comprises the steps that multi-modal data are obtained, wherein the multi-modal data comprise meteorological time sequence parameters, building three-dimensional point cloud and opening geometric parameters and air conditioner cooling parameters; inputting the multi-modal data into a multi-modal fusion neural network model to obtain a natural ventilation evaluation result, the natural ventilation evaluation result comprising vertical temperature distribution of the atrium and the ventilation quantity of each opening of the atrium; wherein the multi-modal fusion neural network model comprises a meteorological time sequence feature extraction module, a building geometric coding module, an air conditioning system parameter coding module, a cross-modal feature fusion module, a vertical temperature field prediction module and a ventilation quantity prediction module. According to the method, a space-time cooperative sensing mechanism of meteorological time sequence dynamic, building space topology and air conditioner parameter features is established, and the technical bottleneck of a traditional method in the aspects of cross-modal feature space alignment and interaction efficiency is broken through.

The invention discloses an underground building space interface energy regulation and control method and system based on data processing, and the method comprises the steps: generating an initial design scheme of an underground building space interface according to design parameters including the type of the underground building space interface; calculating underground building space performance indexes of the initial design scheme, and performing underground building space performance evaluation on the initial design scheme by referring to preset underground building space performance indexes; performing multi-target space performance-oriented space interface optimization design on the initial design scheme which does not reach the standard to generate an optimization design scheme of the underground building space interface; and performing underground building space performance evaluation on the optimal design scheme, and outputting the optimal design scheme of the underground building space interface which is evaluated to reach the standard. Optimization design of an underground building space interface is achieved, natural lighting, natural ventilation, energy consumption performance and the like of the underground building are comprehensively optimized, and the environment quality and the energy utilization efficiency of the underground space are improved.

The present invention relates to the technical field of natural ventilation in buildings, and in particular to a computationally assisted decision-making method and system for climate-adaptive building cavity design. The method comprises: using a Delaunay triangulation method to generate an initial mesh, using a Laplace operator-based mesh refinement method to adaptively refine the initial mesh, so as to obtain an adaptive mesh system, wherein the adaptive mesh system is used for dynamically adjusting the mesh density of conditional PINNs; constructing a multi-task learning framework within the conditional PINNs, wherein the multi-task learning framework is used for jointly predicting a plurality of physical field variables within the conditional PINNs; and iteratively training the conditional PINNs, and using a gradient descent algorithm to minimize a loss function until a predetermined number of training iterations or loss convergence is reached, thereby generating a key physical field variable prediction model in building cavity design. The present invention can implement efficient and accurate prediction of key physical quantities in building cavity design, and can be adapted to different building layouts and functional space characteristics.

The invention provides a backpressure adjusting method and device for a natural ventilation direct air cooling system, and the method comprises the steps: obtaining the current backpressure of a steam turbine, and executing an up-cut step sequence when the current backpressure is greater than a set backpressure first preset difference value, and the up-cut step sequence comprises the steps: setting a first target sector as a new commissioning sector, and setting a second target sector as a second commissioning sector; the control mode of the shutter opening degree of the new commissioning sector is set to be automatic adjustment within the first preset opening degree range; when the current back pressure is smaller than a second preset difference value of the set back pressure, a down-cut step sequence is executed, and the down-cut step sequence comprises the step that the control mode of the shutter of the second target sector is automatically adjusted in the first preset opening degree range from the second preset opening degree range to the second preset opening degree range till the second target sector quits operation. By controlling the automatic switching of the sectors and the automatic adjustment of the opening degree of the shutter, the automatic adjustment of the back pressure is realized, the automation degree of the back pressure adjustment is improved, the precision and efficiency of the back pressure adjustment are further improved, and the efficiency of the generator set is improved.

The invention discloses a dynamic water distribution method and system for a natural ventilation cooling tower, and the method comprises the following steps: testing the natural ventilation cooling tower, obtaining the performance parameters of the cooling tower, constructing a CFD simulation model of the natural ventilation cooling tower, and calculating the performance parameters of the cooling tower according to the CFD simulation model. The performance parameters of the cooling tower serve as boundary conditions of a CFD simulation model of the natural ventilation cooling tower to be calculated, a sample point response value is obtained, a Kriging agent model is constructed, the sample point response value is adopted for training, the trained model is adopted for collecting data of a water distribution execution mechanism of the cooling tower, the data are processed, and the performance parameters of the cooling tower are obtained. And the adjusted initial circulating water flow of the fan-shaped area is obtained, and water distribution adjustment is conducted on a cooling tower water distribution executing mechanism based on the adjusted initial circulating water flow of the fan-shaped area. Dynamic water distribution of the natural ventilation cooling tower according to environmental conditions is achieved, and the influence of environmental crosswind on the heat exchange performance of the natural ventilation cooling tower is reduced.

The invention discloses a natural ventilation cooling tower thermal performance collaborative optimization method, which comprises the following steps of carrying out performance test on natural ventilation cooling tower filler to obtain performance parameters of a natural ventilation cooling tower, establishing a model based on the performance parameters of the natural ventilation cooling tower, and carrying out collaborative optimization on the thermal performance of the natural ventilation cooling tower. Extracting filler arrangement form parameters and water distribution structure parameters of the natural draft cooling tower, obtaining optimal uniformity sample points of the parameters by using an optimization algorithm and experimental design, obtaining the tower outlet water temperature of the natural draft cooling tower at the optimal uniformity sample points through CFD calculation, constructing a radial basis agent model based on data obtained through CFD calculation, and calculating the tower outlet water temperature of the natural draft cooling tower according to the radial basis agent model. And an optimization algorithm is used for carrying out optimization solution on the radial basis agent model, and filler arrangement form parameters and water distribution structure parameters corresponding to the lowest tower outlet water temperature of the natural ventilation cooling tower are obtained. By obtaining the optimal design of the filler arrangement and the water distribution structure, the outlet water temperature of the natural ventilation cooling tower is reduced to the maximum extent, and the purposes of energy conservation and consumption reduction of a thermal power generating unit are achieved.

The invention relates to the technical field of building curtain walls, in particular to a splicing type building energy-saving curtain wall which comprises a curtain wall plate and a beam frame, the curtain wall plate is located on the front side of the beam frame, inserting blocks are fixed to the lower left corner and the lower right corner of the rear side of the curtain wall plate, and supporting blocks corresponding to the inserting blocks are fixed to the upper left corner and the upper right corner of the rear side of the curtain wall plate. And an upper side buckling block and a lower side buckling block are arranged on one side of the rear side of the curtain wall plate. According to the splicing type curtain wall system, accurate butt joint of the curtain wall plates in the installation process is ensured through accurate matching of the inserting blocks and the supporting blocks and butt joint design of the notches and the protruding blocks, the curtain wall plates are firmly fixed through the rotating wheels, the rotating frames, the sliding shafts and other assemblies, the heat bridge effect is reduced, the heat preservation performance is enhanced, natural ventilation is promoted through reasonable structural gaps, and the service life of the curtain wall is prolonged. The internal temperature of a building is effectively reduced, dependence on an air conditioner is reduced, passive energy saving is achieved, modular and standardized design is achieved, the construction efficiency is greatly improved, the installation process is simplified, manual adjustment and errors are reduced, and the splicing stability and shock resistance are enhanced through a locking structure.

The utility model relates to a shutter, the shutter is used for a natural ventilation cooling tower, the natural ventilation cooling tower is provided with a windward side and a wind sheltering side, the shutter comprises a plurality of windward modules and a plurality of wind guide modules, the windward modules and the wind guide modules are connected to form the annular shutter, and the wind sheltering side and the wind sheltering side are connected to form the shutter. The louver is used for being arranged on the periphery of the natural ventilation cooling tower in a surrounding mode, the windward module is used for being arranged on the windward side and enabling air flow to have a windward air inlet direction, and the air guide module is used for being arranged on the wind sheltering side and enabling the air flow to have an air guide air inlet direction. And the windward air inlet direction is different from the air guide air inlet direction. By means of the technical scheme, the shutter can adapt to the actual situation of air flow around the natural ventilation cooling tower.

The utility model belongs to the field of building photovoltaic technology, and relates to a photovoltaic ventilation enclosure structure system based on evaporative cooling, which comprises a building outer enclosure structure surface, a photovoltaic panel and a ventilation cavity, the ventilation cavity is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively provided with shutters capable of being controlled to be opened and closed; a heat conduction or heat exchange device is arranged between the shady face of the photovoltaic panel and the outer wall of the ventilation cavity, and the surface of the building outer envelope structure and the photovoltaic panel are located on the two opposite sides of the ventilation cavity respectively. The passive evaporative cooling mode is clean, pollution-free, energy-saving, carbon-reducing, remarkable in cooling effect and economical; the mode of combining natural ventilation with evaporative cooling is adopted, the cooling effect is more obvious, meanwhile, the hot and humid environment of a building envelope structure can be regulated and controlled, and cold and hot load energy of a building is reduced.

The invention discloses a demisting water-saving natural ventilation wet cooling tower and a working method, the cooling tower comprises a cooling tower body, a filler, a water distribution system, a dehydrator and a plurality of sound wave generators are arranged in the cooling tower body, and the sound wave generators are mounted at the upper part and the nearby area of a water distribution tank maintenance channel in the cooling tower; the sound wave generators are distributed in a high-humidity air flow area, a high-water-drop-content area, a medium-humidity air flow area and a medium-water-drop-content area. The sound wave generator adjusts the frequency and the sound intensity to the maximum extent according to the water drop characteristics, the environmental conditions and the water collecting efficiency; a certain proportion of water is recycled according to different working conditions through the sound wave water collecting technology, waste of water resources is effectively reduced, and the water saving effect is more prominent when the unit operates at low load; and meanwhile, when the water is recovered, the generation of fog plumes around the cooling tower is reduced, the surrounding environment is improved, and the potential influence of the fog plumes on peripheral equipment and facilities is reduced.

The energy-saving curtain wall structure with the ventilation function comprises a curtain wall body, the inner side of the middle of the curtain wall body is hollow and sealed, ventilation grooves are formed in the upper side and the lower side of the curtain wall body, and shutters are arranged in the ventilation grooves; the louver comprises a plurality of rotating shafts rotationally arranged on the inner sides of the ventilation grooves and louver blades arranged on the outer sides of the rotating shafts; grooves are formed in the side edges of the upper side and the lower side of the curtain wall body correspondingly, the ends of the rotating shafts in the corresponding ventilation grooves penetrate into the grooves, and gears are fixedly arranged at the ends of the rotating shafts. According to the curtain wall, through pure mechanical linkage of the memory alloy spring, the rack, the gear and the rotating shaft, the blind window can be automatically opened and closed along with the room temperature, a motor, a sensor or manual intervention is not needed, manual operation is thoroughly eliminated, the response speed only depends on physical phase change of the memory alloy, and the automation level is remarkably improved. The hollow sealed curtain wall main body and the upper and lower ventilation slots form a chimney effect channel which is linked with the shutters to amplify the natural ventilation efficiency.

The invention relates to the technical field of heat dissipation of power distribution cabinets, in particular to a low-voltage power distribution cabinet for buildings, which comprises a cabinet body, an object placing plate is fixedly connected in the cabinet body, a power distribution element main body is placed at the upper end of the object placing plate, and the low-voltage power distribution cabinet further comprises a rainy day heat dissipation assembly which comprises a water collecting hopper fixedly connected at the upper end of the cabinet body. Different heat dissipation modes are provided for different weathers, water-cooling heat dissipation is adopted in heavy rain weather, fan blades are driven by wind power to rotate in windy weather to generate electricity for heat dissipation of heat pipes, natural ventilation heat dissipation is achieved through heat dissipation holes in normal weather, and forced ventilation heat dissipation can be achieved through a heat dissipation fan besides the first sealing plate and the second sealing plate are opened to increase convection in high-temperature weather; heat dissipation modes can be flexibly switched according to different weather conditions, the automatic adjusting assembly and the valve can automatically adjust the drainage path in rainy days, it is ensured that rainwater in the water collecting hopper can be smoothly drained, and meanwhile the heat dissipation function and the dustproof and rainproof function of the device are guaranteed.

The invention discloses a natural ventilation cooling tower and a dumbbell-shaped concrete filled steel tube cross strut thereof, the dumbbell-shaped concrete filled steel tube cross strut comprises four dumbbell-shaped steel tube limb columns and cross nodes, and the end parts of the dumbbell-shaped steel tube limb columns are connected with the cross nodes to form a cross structure; the cross joint comprises a vertical stiffening plate, an upper reinforcing ring, a lower reinforcing ring, a plurality of joint sleeves and a plurality of joint webs, the upper reinforcing ring and the lower reinforcing ring are perpendicularly crossed with the vertical stiffening plate, the joint webs are connected with the joint sleeves, and the joint sleeves, the joint webs, the upper reinforcing ring and the lower reinforcing ring form a dumbbell-shaped structure with the vertical stiffening plate as the central axis. Open holes are formed in the reinforcing rings and used for pouring and circulation of concrete, the four dumbbell-shaped steel pipe limb columns are arranged at the open holes of the upper reinforcing ring and the lower reinforcing ring, and a closed space is formed by the joint sleeve, the joint web, the upper reinforcing ring, the lower reinforcing ring and the four dumbbell-shaped steel pipe limb columns. The problem of material waste caused by rich in-plane directional bearing capacity of a circular section can be solved.

The invention discloses a natural draft cooling tower and a lattice type concrete filled steel tube cross strut thereof, the lattice type concrete filled steel tube cross strut comprises four lattice columns and cross nodes, the end parts of the lattice columns are on the same plane and are connected with the cross nodes to form an X-shaped structure, and each lattice column comprises a concrete filled steel tube column limb and a web member for connecting the adjacent concrete filled steel tube column limbs; the cross joint comprises two joint branch assemblies and a joint belly assembly connected with the two joint branch assemblies, and each joint branch assembly comprises a joint panel, a first covering panel and a second covering panel, wherein the first covering panel and the second covering panel cover the joint panel. The joint face plate comprises a joint top plate, a joint bottom plate, a joint stiffening plate and a reinforcing ring plate, the joint stiffening plate and the reinforcing ring plate are arranged between the joint top plate and the joint bottom plate, and open holes are formed in the joint top plate, the joint bottom plate and the reinforcing ring plate and used for concrete pouring and circulation. And the four latticed columns are arranged at the holes of the node top plates and the node bottom plates of the two node branch assemblies. The use amount of strut steel and concrete is reduced, and the construction speed and the construction quality are improved.

The invention relates to the technical field of power supply cabinets, and discloses an integrated micro-station power supply cabinet which comprises a cabinet body, a core component loading cabin is arranged in an inner cavity of the cabinet body, and two cooling mechanisms and two self-locking cabin doors are symmetrically arranged on the upper side and the lower side of the core component loading cabin. The cooling mechanism is in transmission connection with the left side and the right side of the self-sealing cabin door through a cross guide frame. The crossed guide frame is in axial sliding fit with a sliding rail which is rigidly connected with the inner side wall of the cabinet body; intelligent switching between natural ventilation and forced heat dissipation is achieved through the cross guiding system. In the natural ventilation mode, the unfolding mechanism forms an airflow channel to achieve passive heat dissipation. When the temperature exceeds the limit, the mechanism shrinks to form a sealed cavity, and double-channel forced cooling is started; according to the design, precise and controllable conversion between energy conservation and efficient heat dissipation is achieved.

The present invention discloses a ventilator for building ventilation, which relates to the field of ventilation technology, a mounting plate, a circular hole is provided at the center of the mounting plate, a mounting tube is fixedly connected to the edge of the circular hole in the center of the mounting plate, a connecting hole is provided around the outer wall of the middle position of the mounting tube, a wind shield is fixedly connected to the middle position of the mounting tube, a plurality of air inlet flaps are fixedly connected to the top of the wind shield, the air inlet flaps are evenly arranged and installed at a certain angle, a fixing ring is fixedly connected to the top of the air inlet flap, the fixing ring can make the arrangement structure of the air inlet flap more stable, a rotating ring is slidably connected to the top of the mounting tube, a plurality of wind hemispheres are fixedly connected to the top of the rotating ring. The ventilator for building ventilation disclosed by the present invention has the technical effect that a natural ventilator can adjust the size of the inlet and outlet according to the size of the wind force in strong wind weather to prevent the natural ventilator from twisting and deforming.

To provide a ventilation control apparatus and a ventilation control program which can carry out natural ventilation more suitably for the intended use as compared with the conventional art.SOLUTION: A ventilation control apparatus 10 according to the present invention has an acquiring unit 11A for acquiring measured results of direction and velocity of wind at the outside of a target building, a deriving unit 11B for, on a real-time basis, air flow distribution at the inside of the building with respect to each of combinations of a plurality of predetermined opening states at the building opening part by using the wind direction and the wind velocity acquired by the acquiring unit 11A, and a control unit 11C for selectively applying the opening state of the opening corresponding to the air flow distribution suitable for the type of an event carried out in the building, among the air flow distributions derived by the deriving unit 11B, to control the opening state of the opening part.SELECTED DRAWING: Figure 4

The invention discloses a natural ventilation and mechanical ventilation interconvertible road tunnel ventilation system, which is arranged in a one-way driving road tunnel and comprises a tunnel road natural ventilation facility and a tunnel road mechanical ventilation facility, the tunnel road natural ventilation facility comprises a natural ventilation duct, a natural ventilation shaft and a natural ventilation valve; the tunnel road mechanical ventilation facility comprises a mechanical ventilation duct, a mechanical ventilation shaft, a mechanical ventilation valve and a ventilator. A natural ventilation opening of the one-way driving road tunnel is sequentially connected with a natural ventilation valve and a natural ventilation shaft through an air duct. The natural ventilation duct between the natural ventilation valve and the natural ventilation opening is sequentially connected with a tunnel mechanical ventilation valve, a ventilator and a mechanical ventilation shaft through a tee joint; the road tunnel mechanical ventilation valve and the ventilator are in a chain opening and closing relation. The invention provides a tunnel ventilation system which not only can meet the tunnel ventilation requirement, but also can solve the problems of land acquisition, landscape, environment and the like.

The invention relates to the technical field of flame retardant property detection of fireproof materials, in particular to a detection device and a detection method for evaluating the flame retardant property of a facing type fireproof coating. According to the detection device, a combustion space close to an actual building environment is provided, on one hand, the state of the ventilation opening is adjusted through the electric louver, different ventilation conditions such as natural ventilation, mechanical ventilation or ventilation blocking when a fire occurs are simulated, and the coating is tested in various airflow environments; on the other hand, a heat radiation source is arranged to simulate a heat radiation environment around a material in a fire, non-uniform heat radiation intensity distribution is set to be similar to a real fire scene heat source complex condition, and the performance of the coating under different heat radiation conditions is tested. Besides, the gas mixer can dynamically adjust the oxygen concentration in the cabin according to the test requirement, so that the conventional oxygen index test is met, the oxygen content change in the fire process can be simulated, and the flame-retardant performance of the coating in the actual oxygen content fluctuation scene is explored.

The invention provides a natural ventilation cooling tower interval precast concrete ring beam and combined inclined strut structure. The structure comprises prefabricated ring beam modules, cast-in-place ring beam sections and combined inclined struts. The combined inclined struts are of an integral prefabricated structure formed by combining a column top connecting plate and two herringbone inclined struts and are uniformly arranged along the circumference of the cooling tower, and the bottom ends of the inclined struts are connected with bearing platforms uniformly distributed on a ring foundation; the prefabricated ring beam module is of an inverted-boss-shaped prefabricated structure, the bottom faces of the two sides of the prefabricated ring beam module are supported on the edges of the two corresponding connecting plates in a lap joint mode, and an inverted boss on the lower portion of the prefabricated ring beam module is embedded into a gap between the two connecting plates. The prefabricated ring beam modules and the cast-in-place ring beam sections are arranged at intervals and connected in the circumferential direction to form an integral ring beam structure, and the prefabricated ring beam modules are higher than the cast-in-place ring beam sections. The construction of the spaced precast concrete ring beam and the combined inclined strut structure does not need to erect a support frame, so that the construction difficulty is greatly reduced, the construction cost is saved, the construction safety risk is reduced, and the construction period is shortened.

The invention discloses a multi-shaft ultra-long high-ground-temperature railway tunnel fan optimization configuration method which comprises the following steps: acquiring basic calculation parameters of a multi-shaft ultra-long railway tunnel, and further establishing a physical model; based on the physical model, establishing a multi-shaft super-long railway tunnel surrounding rock-lining-airflow-ventilation network heat, humidity and flow coupling mathematical model, and performing rapid solving; on the basis of a mathematical equation solving result of the mathematical model, the feasibility of temperature control and humidity control under the working condition of only natural ventilation is judged, for the working condition that only natural ventilation is not feasible, a ventilation fan decision-making variable is selected, and optimization design is conducted on fan configuration with ventilation energy consumption as the target and the maximum temperature and humidity along the way as the constraint; according to the method, optimization of the fan configuration scheme under the multi-factor working condition is achieved.

The utility model provides a natural ventilation direct air cooling steam exhaust system which comprises a mother pipe arranged in an air cooling tower, and the mother pipe is used for allowing to-be-cooled gas to flow in; a gas outlet of the main pipe is divided into a left outlet and a right outlet and communicated with the gyrotron, a layer-by-layer steam exhaust device is arranged on the gyrotron, the pipeline diameter of the gyrotron is gradually reduced in the direction of gas flow, and the layer-by-layer steam exhaust device is arranged on the gyrotron and used for dividing to-be-cooled gas and enabling the to-be-cooled gas to flow into the cooling triangle. The cooling triangle is arranged on the periphery of the air cooling tower, natural air enters the cooling triangle, and the natural air and to-be-cooled gas are converged in the cooling triangle to form natural air cooling. And the extension mother pipe enters the air cooling tower and then is shunted, so that the problem that shunting is not timely is avoided.

The invention relates to the technical field of air purification equipment, in particular to an unpowered public place air directional flow purification structure. The problems that in the prior art, the natural ventilation principle and the multi-stage purification function cannot be fused on the structural design level, and consequently inherent defects exist in the aspects of energy consumption, noise, maintenance cost, airflow organization stability and the like are solved. The unpowered public place air directional flow purification structure is arranged on a wall unit and comprises a micropore physical pre-filtering structure, a multi-layer labyrinth type physical filtering structure and an adsorption / deposition structure which are integrally arranged in a closed mounting cavity in the wall unit. In the operation process of the structure, no fan or motor or external power supply is needed in the whole process, air circulation is driven by completely depending on the thermal characteristics of the wall and weak thermal buoyancy formed by an indoor environment heat source, no mechanical moving part exists in the operation process, the noise level is low, and the noiseless requirement of a hospital ward area at night is met.

A ventilation system is provided for persistent natural ventilation by circulation of air between an interior space and an external environment. In one example, the ventilation system includes an air intake including a domed upper cover with exterior windows which allow air to circulate through an upper chamber, a baffle around floatable elements, the baffle including an annular protective screen and valve windows, a lower chamber fluidly coupled to each of the upper chamber via the baffle and an interior duct via a main window thereof, wherein the interior duct is fluidly coupled to the interior space, and wherein the floatable elements are positioned on respective seats when no liquid is present, each of the seats spaced a distance opposite to a respective one of the valve windows. Responsive to liquid entering the upper chamber via the exterior windows, the valve windows may be automatically blocked by the floatable elements.

The invention relates to the technical field of radars, and discloses an active ventilation cooling system and method for a radar radome, the system comprises a top ventilation opening, the radome, an active ventilation cooling device and a fan controller, the top ventilation opening is located at the top end of the radome and is used for natural ventilation and auxiliary heat dissipation; the antenna housing is designed to be in a cavity opening type hemisphere shape so as to adapt to installation and operation of a radar antenna. The active ventilation cooling device is arranged at the bottom end of the antenna housing and is used for air intake and air exhaust; and the fan controller is used for controlling the start and stop of the active ventilation cooling device. The problem of poor heat dissipation of the radar radome in a high-temperature environment can be solved, and efficient heat dissipation, automatic control and all-weather work are realized.

The invention belongs to the technical field of cable bridges, and particularly relates to a cable bridge for wiring of an intelligent power grid, which comprises a bridge main body, and the bridge main body comprises a hoisting main frame and a supporting cross beam fixed on the inner side of the hoisting main frame; the heat dissipation mechanism is arranged on one side of the bridge main body; the invention aims to solve the problems that an existing suspension type cable bridge is hoisted at a use position during use and is usually directly bound in the bridge by adopting a binding band and the like, the temperature is too high due to heat accumulation caused by concentrated binding, and the heat dissipation effect is poor, the vibration resistance is poor and the clamping is unstable due to the adoption of natural ventilation; according to the invention, the bridge main body and the clamping mechanism are designed, the clamping mechanism is installed through the supporting cross beam, the cable is supported in an auxiliary manner through the cooperation of the installation clamping frame and the supporting seat, and ventilation and heat dissipation can be ensured through separated installation during installation and use, and the clamping arms are driven to rotate through the downward pressing of the clamping pressing columns. And the clamping arm is enabled to clamp the cable and press the clamping claw to clamp the cable, so that the stability is ensured.

The invention relates to a transformer cooling device based on natural resources and a using method thereof.The transformer cooling device comprises a tunnel communicated with a transformer room, the middle section of the tunnel is located underground, the underground temperature of the tunnel is lower than the external temperature, a first draught fan is installed in the tunnel, and the output end of the first draught fan is communicated with the transformer room; and the input end of the first fan is communicated with outside air. According to the transformer cooling device based on the natural resources and the using method of the transformer cooling device, the problem that in the prior art, the transformer cooling effect is poor by adopting a natural ventilation mode in high-temperature weather is solved.

The present application provides a low-carbon emission reduction internal and external double circulation insulated grain storage warehouse, which relates to the field of warehouse storage technology. It includes: warehouse wall external circulation, warehouse wall internal circulation and intelligent temperature and humidity control system. The warehouse wall external circulation consists of an air layer formed between the outer wall and the inner wall, and an air layer formed between the outer wall top and the solar integrated photovoltaic panel and the inner wall top. These air layers are connected to the outside world through the ground natural wind vents and the air outlet holes on the outer wall top, so as to reduce the heat transfer between the outer wall and the inner wall by using the chimney effect; the warehouse wall internal circulation consists of a plurality of horizontal ventilation ducts and a plurality of vertical circulation ducts arranged in the warehouse, and can cooperate with the intelligent temperature and humidity control system to form a circulating low-temperature airflow inside the inner wall, so as to control the grain temperature near the inner wall of the warehouse. The present application has the advantage that the grain stored in the grain storage warehouse is not easy to have "cold heart and hot skin".

The utility model belongs to the technical field of teaching building aisle outer wall devices, and particularly relates to a teaching building ventilation aisle outer wall device which comprises an outer wall body, a through ventilation opening is formed in the surface of the front end of the outer wall body, a movable groove is formed in the outer wall body, and a movable block is connected to the surface of the inner side of the movable groove. According to the teaching building aisle ventilation device, through mutual cooperation of the ventilation opening and the fan, when the wind speed in the environment is small, the fan is started, the fan accelerates the air flowing speed in the teaching building aisle through the ventilation opening, and the good ventilation effect is achieved in the aisle, and then through mutual cooperation of the electric push rod, the wind speed sensor and the PLC control switch, the ventilation effect is good. When the wind speed in the environment is high, the wind speed sensor can send information to the PLC control switch, the electric push rod is started to drive the sliding block to enable the movable block to move to the other end of the movable groove, the fan does not shield the ventilation opening, the corridor is naturally ventilated through the ventilation opening, the fan is prevented from being started all the time, and energy consumption is reduced.

The utility model discloses a built-in ventilation device of a comprehensive distribution box, which comprises a housing, the housing is provided with a natural ventilation area and a forced ventilation area, the natural ventilation area is provided with natural ventilation holes arranged in an array, and the forced ventilation area is provided with an axial flow fan. The ventilation effect and the ventilation quantity are improved.