273 results about "Capillarities" patented technology

The invention discloses a supported nickel catalyst for preparing 1, 3-propylene glycol through hydrogenation of 3-hydroxypropionaldehyde as well as a preparation method and application of the supported nickel catalyst, and relates to the technical field of catalysts. The modified long-chain multi-carbon inducer is used, and a special long-chain molecular structure and a branched chain group of the inducer can effectively and selectively adsorb and occupy a micropore impregnation site; the preparation method has the beneficial effects that more active component nickel species are obviously promoted to be dispersed in main reaction confinement spaces such as mesopores and macropores and interact with the carrier to form effective active sites, and active component steeping liquor is inhibited from entering micropore channels due to capillary action; the active site failure caused by agglomeration of nickel species in micropores in the subsequent drying and roasting process of the catalyst precursor is avoided, the efficient and directional reaction is ensured, the generation of by-products is greatly reduced, the pressure is relieved for the subsequent product rectification separation, and the final product purity is improved. The catalyst provided by the invention can still keep an excellent catalytic effect when the air speed of a 3-hydroxypropionaldehyde solution is increased to 6.5 h <-1 >.

Even if the cap is removed from the mouth of the container while the internal pressure of the container body has increased, the contents will not spray out through the connecting passage. [Solution] The container comprises a container body 11 for containing the liquid contents, a cylindrical stopper member 12 attached to the mouth 11a of the container body, and an impregnating material 13 attached to the inside of the stopper member and capable of impregnating the liquid contents. The stopper member comprises a containment cylinder 15 for containing the impregnating material with its upper end protruding, and a communication cylinder 16 that connects the inside of the containment cylinder and the inside of the container body. A communication passage 21 is provided between the containment cylinder and the impregnating material, connecting the inside of the communication cylinder and the upper end opening 15b of the containment cylinder. The communication cylinder has a main passage 22 that connects the communication passage and the inside of the container body, and a capillary passage 23 that connects the communication passage and the inside of the container body, and has a smaller flow path cross-sectional area than the main passage, causing capillary action, arranged in parallel.

A mesh woven structure with capillary action is applied to a two-phase fluid heat dissipation unit. The mesh woven structure includes multiple latitudinal lines and multiple longitudinal lines. At least two longitudinal lines are selectively arranged as a longitudinal line set. The mesh woven structure is woven from the single latitudinal line and one cooperative longitudinal line set, which sequentially repeatedly intersect (and overlap with) each other. Accordingly, the number of the voids of the mesh woven structure is increased so that the mesh woven structure has better capillary attraction and water collection (containing) ability to greatly enhance the heat transfer performance.

The invention discloses a high-precision tool setting device for numerical control machining, which belongs to the technical field of numerical control machining and comprises a control system, a worktable, a tool arranged on the worktable, a tool setting gauge fixedly mounted on the worktable and a driving mechanism arranged on the worktable. The blow-off drying mechanism comprises fixing bases symmetrically and fixedly installed on the two sides of the tool setting gauge, a blowing assembly arranged on the two fixing bases, a first sensor and a second sensor, wherein the first sensor and the second sensor are arranged at the top and the bottom of the blowing assembly respectively. According to the numerical control machining high-precision tool setting device, the blow-off drying mechanism, the shielding protection mechanism and the driving mechanism are matched, air blowing, liquid removing and drying can be conducted on a tool nose of a tool firstly, meanwhile, an umbrella-shaped cover is used for protecting and shielding a tool setting gauge, contact tool setting is completed after resetting and avoiding are conducted, capillary acting force generated by a cutting liquid film is fundamentally eliminated, and the working efficiency is improved. Real and reliable contact between the tool nose and the tool setting gauge is guaranteed, and tool setting precision and repeated reliability are improved.

A porous wick based on a conformal metal metamaterial comprises a pipe body, a wick body is arranged in the pipe body in a sleeved mode, the wick body comprises a conformal design porous structure, gaps of the porous structure are filled with the metal metamaterial, and a design method of the porous structure comprises the steps that mesh generation is conducted on a model of the wick body, and after mesh generation, the wick body is made of the metal metamaterial. A conformal design method is adopted to fill each gap of a wick with a metal metamaterial, the wick is prepared through a 3D printing manufacturing technology, the unit cell geometrical shape of the metamaterial can be regulated and controlled according to the actual situation of a porous structure, the metal metamaterial is introduced, the highly optimized porous structure is adopted, and the performance of the wick is improved. The capillary action and the liquid transmission efficiency of the wick are remarkably improved, the parameters such as porosity, unit cell size and microstructure type can be adjusted, and the capillary capacity and the fluid flowing path are optimized.

The invention discloses a porous Tesla valve micro-channel heat exchanger and a manufacturing method thereof.The micro-channel heat exchanger comprises a bottom plate and a cover plate, a solid medium substrate is formed on the upper end face of the bottom plate, and the solid medium substrate is made of a porous heat conduction material; a Tesla valve flow channel is formed in the solid medium substrate and used for enabling a working medium to be in one-way conduction, and a rough surface is arranged on the inner bottom wall of the Tesla valve flow channel; the cover plate covers the bottom plate, and a containing cavity is formed in the lower end face of the cover plate and used for containing the solid medium substrate. Steam countercurrent in the boiling heat exchange process is restrained through the Tesla valve flow channel, and the two-phase flow stability of boiling heat exchange is enhanced; nucleation sites are provided through the rough surface of the inner bottom wall of the flow channel of the Tesla valve and the porous structure of the inner side wall, meanwhile, the moisture of the heat exchange surface in the channel is maintained through the capillary action, and the boiling heat exchange efficiency is enhanced.

A rapid dual test kit (1) for DHA and EPA detection and method of preparation thereof; that detects DHA and EPA within 0-20 minutes, preferably 1 min; comprising of-a test device (2), a test diluent (29), a dropper (32), a pack insert (33) and a silica gel (34), an immuno-chromatographic strip (3) further comprising of a sample release pad (5), a conjugate pad (6), a nitrocellulose membrane (7), and an absorbent pad (8) arranged in a sequential overlapping manner over a backing material (4); encased in a test device (2) consisting of three open areas namely a sample port (11), test line viewing area (30), and control line viewing area (31); allowing lateral flow of sample (29) from sample release pad (5) to absorbent pad (8) via capillary action; and the method of preparation of kit is disclosed.

This invention belongs to the field of electrocatalytic hydrogen evolution catalyst technology, and particularly relates to an ultrasmall intermetallic compound confined in mesoporous carbon interstices and its preparation method. Using mesoporous silica SBA-15 as a hard template, sulfur-containing amino acids are filled into the SBA-15 channels via capillary action as a carbon source. Simultaneously, potassium chloroplatinate and a transition metal source are also filled into the SBA-15 channels along with the sulfur-containing amino acids. The mass ratio of potassium chloroplatinate, SBA-15, and sulfur-containing amino acids is 1:5–10:20–30, and the metal mass is consistent with the atomic ratio in the formed Pt-based intermetallic compound. The reaction also includes a solvent and water. This invention uses electrocatalytic hydrogen evolution as a model reaction to investigate the catalytic activity and stability of this PtFe ultrasmall nanoparticle embedded in a mesoporous carbon support. Electrocatalytic results show that it exhibits excellent activity and stability, meeting the requirements of related applications and development.

The utility model provides an oil cup for lubricating an elevator guide rail, which relates to the technical field of elevator accessories, and comprises an oil storage cavity, a connecting piece, a sealing cover, an extension cavity, a lubricating component, a sliding block, a through groove, a guide plate, an iron block, an electromagnet, an elastic piece, a sleeve and a cotton rope cluster, according to the oil cup, when a lift car of an elevator moves, the cotton rope cluster can make contact with the surface of a guide rail, lubricating oil is drained to the surface of the guide rail through the capillary action of the cotton rope cluster to lubricate the surface of the guide rail, and when the lift car of the elevator does not move, the lubricating oil is drained to the surface of the guide rail through the capillary action of the cotton rope cluster. The cotton rope cluster is separated from the surface of the guide rail, and meanwhile the cotton rope cluster is retracted into the extension cavity, so that lubricating oil cannot be guided to the surface of the guide rail through the cotton rope cluster, and meanwhile the lubricating oil can flow back into the extension cavity and the oil storage cavity, consumption of the lubricating oil is reduced, the frequency of adding oil into the oil storage cavity is reduced, and it is guaranteed that an elevator can be continuously and normally used.

A living wall system generally having a number of layers including a waterproof membrane layer for preventing water and moisture from seeping to the building structure or wall in which the living wall system is installed. Next, a number of growing medium layers are provided having a wicking fabric layer between them, the growing medium typically of felt. The wicking fabric layer ensures even watering and smooth capillary action. The front growing medium layer has plant pockets for holding plants.

A nicotine e-vaping device may include a device body configured to receive a nicotine cartridge. The nicotine cartridge includes a nicotine pre-vapor formulation, a wick, and an integral heater-thermocouple. The wick is configured to transport the nicotine pre-vapor formulation by capillary action. The integral heater-thermocouple includes a first segment made of a first alloy and a second segment made of a second alloy. The device body includes a power supply, at least one sensor, and a controller. The power supply is configured to deliver electrical energy to the integral heater-thermocouple to heat the nicotine pre-vapor formulation to generate a nicotine vapor. The at least one sensor is configured to measure a voltage difference between the first segment and the second segment of the integral heater-thermocouple during such heating. The controller is configured to adjust the electrical energy to the integral heater-thermocouple based on the measured voltage difference.

The utility model relates to vehicle technical field, specifically disclose a fastener, vehicle body and vehicle, and the fastener can be connected with the surface abutment of the connecting piece through the abutment surface, the fastener is provided with the flow channel, the flow channel penetrates the abutment surface and the outer surface except the abutment surface of fastener, the flow channel can form the outflow channel, break the continuous gap structure, interfere with the formation of capillary action, thereby reduce the infiltration and accumulation of electrophoretic paint liquid between fastener and connecting piece, and the flow channel can provide the outflow path for the liquid in the gap between fastener and connecting piece, when the liquid drainage process, liquid can be discharged outward through the flow channel, reduce the residual amount in the gap, thereby reduce the outflow amount of liquid when drying. And drying process, the flow channel provides the pressure relief channel, reduces electrophoretic paint liquid because of the pressure difference is extruded and forms the flow mark, reduces electrophoretic polishing process, guarantees the anticorrosive performance and appearance quality of vehicle body.

A misting device for aeroponically cultivating plants in a growing chamber provided with fluid in a water reservoir, comprising: an ultrasonic atomization transducer (UAT) configured to generate a misting spray in the presence of fluid; and a wicking means configured to transport fluid from the water reservoir by capillary action to the ultrasonic atomization transducer, when the lower end of the wicking means is disposed in contact with the water reservoir. Also disclosed is a growing system for aeroponically cultivating plants comprising: a growing chamber for containing the plants, and provided with a water reservoir containing fluid; and misting devices. The misting devices are oriented such that the respective misting sprays interact with each other to create an ultra-fine mist inside the growing chamber. In some aspects, the water reservoir may further comprise nanobubbles to maintain elevated dissolved oxygen levels and improve root-zone oxygenation.

The invention discloses a detection method of inflammatory marker protein. According to the method, the micro-fluidic chip with a sample loading area, a buffer treatment area, a sample channel and a detection area is prepared on filter paper through wax printing; chitosan is preset in the sample loading area and is used for treating a sample, and bromothymol blue is fixed in the detection area and is used as a pH indicator. During detection, a sample is driven by a phosphate buffer solution with the pH value of 6.0 to flow to a detection area through capillary action, the C-reactive protein and the indicator are subjected to non-specific binding, so that the color of the detection area is changed from yellow to green, the length of a green developing signal is in direct proportion to the concentration of the CRP, and quantitative detection can be realized by measuring the length. The method does not need an antibody, is low in cost, is simple and convenient to operate, can complete detection within 15 minutes, has the detection limit of 1.56 ng / ml and the linear range of 5-25 ng / ml, and is suitable for rapid screening and field detection of basic medical institutions.

A cap for an optical module includes features that aid in adhesive attachment. In some examples, the cap includes a standoff configured to initiate capillary action upon contacting adhesive on a substrate to move the cap toward the substrate and an alignment feature configured to control lateral movement of the cap with respect to the substrate as the capillary action moves the cap toward the substrate. In other examples, the cap includes a standoff configured to initiate movement of an adhesive away from a substrate via surface tension and wetting upon contacting the adhesive and an alignment feature is configured to control lateral movement of the cap with respect to the substrate as the adhesive moves away from the substrate.

A nicotine e-vaping device may include a device body configured to receive a nicotine cartridge. The nicotine cartridge includes a nicotine pre-vapor formulation, a wick, and an integral heater-thermocouple. The wick is configured to transport the nicotine pre-vapor formulation by capillary action. The integral heater-thermocouple includes a first segment made of a first alloy and a second segment made of a second alloy. The device body includes a power supply, at least one sensor, and a controller. The power supply is configured to deliver electrical energy to the integral heater-thermocouple to heat the nicotine pre-vapor formulation to generate a nicotine vapor. The at least one sensor is configured to measure a voltage difference between the first segment and the second segment of the integral heater-thermocouple during such heating. The controller is configured to adjust the electrical energy to the integral heater-thermocouple based on the measured voltage difference.

This utility model relates to the field of drying equipment technology and discloses a hot nitrogen drying device for PA6 particles, including a tank body with a heating component. A separation mechanism is located inside the tank body, and a striking mechanism is provided on the separation mechanism. The separation mechanism includes a rotating component and a collision plate. The rotating component is located inside the tank body, and the collision plate is connected to the inner wall of the tank body via a fixing plate. In this utility model, the rotating component in the separation mechanism disperses the PA6 particles using centrifugal force, causing adhered particle clusters to be thrown outwards and collide with protrusions on the inner side of the collision plate. The protrusions enhance the particle collision intensity, breaking up the adhered structure through impact. Simultaneously, the collision plate is made of sintered copper porous material, which absorbs surface moisture from the particles through capillary action, reducing the adhesive force between particles and preventing secondary adhesion. This avoids uneven drying caused by PA6 particle adhesion.

Existing fabrics with moisture management functions only diffuse moisture on one side, and it is difficult to simultaneously ensure moisture absorption, diffusion, and reverse osmosis resistance, and they also lack washing durability and comfort. Therefore, we provide a fabric with better moisture management functions. [Solution] This fabric has moisture management properties and includes a texture layer 1 and a filling layer 2. The texture layer includes a waterproof / breathable layer 4, a hydrophobic layer 5, and a hydrophilic layer 6, while the filling layer includes a flow-guiding layer 7. These layers are arranged in this order from the skin side, with the waterproof / breathable layer being made of a hydrophobic fiber fabric with micrometer-level protrusions on the fiber surface. The fibers in the hydrophilic layer have a hollow, crisscross, multi-lobed, or microporous irregular cross-sectional structure, which rapidly expels moisture through the capillary effect. This allows for one-way moisture flow and prevents reverse osmosis, while also providing moisture absorption, diffusion, and reverse osmosis resistance. Furthermore, the fabric boasts excellent washability, breathability, and a pleasant texture, making it suitable for use in household and pet textiles.

The application belongs to the technical field of knitted fabrics, and particularly relates to a moisture-resistant and antistatic polyester fabric. The application sets face yarn pile threads and evaporation zone pile threads on the outer surface of a face yarn tissue, and makes the two interweave to form a moisture-conducting cluster structure. On the one hand, moisture from the moisture-conducting tissue can be transferred to the surface of the relatively dry face yarn pile thread under capillary action, forming a larger moisture-dissipating area to improve the moisture evaporation efficiency; on the other hand, a breathable space can be formed inside the moisture-conducting cluster constructed by the face yarn pile thread and the evaporation zone pile thread, further enhancing the air circulation capacity, thereby significantly accelerating the evaporation rate of moisture.

A wearable smart ring includes an annular body sized to receive a finger, photoplethysmography (PPG) sensors arranged along an inner peripheral surface, and a microfluidic perspiration collector disposed at the inner surface. The collector has microchannels that draw perspiration by capillary action into one or more reservoirs and includes a region that concentrates or retains biomarkers. A docking station mechanically receives the ring for charging and interfaces with the collector to transfer fluid and / or perform in-situ analysis. The dock includes optical instrumentation (e.g., photometry, spectroscopy such as Raman) and may implement pumping and flushing to reset the collector for subsequent use. A controller communicates results by wireless links. The system enables passive collection of perspiration during wear and detailed biomarker analysis during charging, thereby augmenting PPG-derived physiological measurements with perspiration chemistry without burdening ring power or size.

The utility model belongs to the technical field of fiber textile fabrics, and particularly relates to a warm-keeping fabric. The heat storage chamber is arranged between the sweat absorbing layer and the far infrared receiving and emitting layer, by means of the design of the moisture guiding interface and the position of the moisture guiding interface, after a human body sweats, sweat flows to the far infrared synergistic section along the moisture conveying end, and by means of the temperature rise of the graphene material caused by moisture increase of the far infrared synergistic section, the sweat can be absorbed by the far infrared receiving and emitting layer. The far infrared emission function of the graphene material is enhanced, and the body surface temperature sense is enhanced; furthermore, moisture of the far infrared synergistic section can flow to the water absorption and drainage section under the capillary action, moisture evaporation is achieved on the outer layer of the protective layer, far infrared emission energy interception caused by excessive moisture of the sweat absorption layer is reduced, and the body surface temperature is jointly increased.

This invention discloses a dynamic adaptive ecological slope protection system and method suitable for reservoir bank drawdown zone slopes, belonging to the field of water conservancy engineering and ecological restoration. The system includes an anchoring system, a lifting vegetation trough, an integrated water collection system, and a linked water supply device. The anchoring system uses self-weight triggered self-locking anchors to achieve locking upon installation. The vegetation trough can freely rise and fall along the anchors with the water level, and contains a soil layer and a water-storing sponge layer. The water collection system automatically controls water flow through a float valve, and the linked water supply device relies on elastic expansion and capillary action to achieve water storage during submersion and automatic water supply during emergence. Construction adopts a bottom-up modular installation, using the floating plate of the vegetation trough as a working platform, eliminating the need for high-altitude facilities. This invention can adapt to the off-season hydrological rhythm of the drawdown zone, improving slope stability and vegetation survival rate. It requires no external energy or human intervention and has advantages such as convenient construction, low operation and maintenance costs, and eco-friendliness, making it suitable for ecological protection of reservoir and lake drawdown zone slopes.

A drainage structure for a gas sensor includes a detection element, a protector, and a drainage. The detection element is held in a housing. The detection element includes a detector that is provided in a tip end. The detector is configured to detect a specific component in gas of interest by contact of the gas of interest with the detector. The protector is secured to the housing. The protector covers the detector while ventilation is kept. The drainage has a long shape and is mounted to the protector. The drainage includes a first end disposed in the protector and a second end disposed outside the protector. The drainage is configured to produce a capillary action.

The invention discloses a condensate water collecting and recycling shutter and a preparation method thereof. The shutter comprises an outer frame, a plurality of air guide blades arranged in the outer frame in parallel at intervals, a water conveying pipeline system, a micro negative pressure self-sucking pump and a micro atomizer. The water conveying pipeline system is formed by communicating a blade pipeline arranged in the blade groove and a frame pipeline arranged in the frame groove, a water absorption layer is wound outside the blade pipeline, and water permeable holes are formed in the side wall of the blade pipeline. The preparation method mainly comprises the steps of pipeline processing, water absorption layer winding, system assembling, functional part mounting and the like in a pipeline system, and then the micro negative pressure self-sucking pump actively sucks. According to the air conditioner air outlet shutter, air conditioner condensate water on the surfaces of the air guide blades is efficiently adsorbed through the capillary action of the water absorption layer and collected and conveyed to the miniature atomizer for atomization and humidification, and the technical problem that condensate water is likely to appear in the air conditioner refrigeration process of a traditional air conditioner air outlet shutter is solved.

The utility model discloses a drain board-prefabricated concrete bamboo pile composite structure for reinforcing a soft soil foundation, which comprises a bamboo pile and a drain board fixedly wrapped outside the bamboo pile, the bamboo pile is filled with a concrete core, the lower end of the bamboo pile is also provided with a conical sleeve convenient for pile sinking, and the lower end of the bamboo pile is provided with a prefabricated concrete bamboo pile. And the bamboo pile and the drainage plate are arranged in the conical sleeve in a sleeving manner. According to the drain board-prefabricated concrete bamboo pile composite structure, the drain board is installed outside the bamboo pile, pore water in a soft soil foundation is drained from the upper portion of the bamboo pile through the capillary action of the drain board, and therefore the drainage capacity of the bamboo pile composite foundation is improved, meanwhile, the bamboo pile is filled with the concrete core, the bearing capacity is higher, and the concrete core and the bamboo pile are combined, so that the service life is prolonged. The method can achieve the effects of draining water and reinforcing the soft soil foundation, has the dual functions of draining water and bearing load, and can be widely applied to reinforcing treatment of the soft soil foundation.

The application provides a composite polymer solid electrolyte membrane and a preparation method and application thereof, wherein lithium salt, a cyclic ether compound and a non-ether polymer soluble in or insoluble in the cyclic ether compound are mixed, a polymerizable system is uniformly coated on one side or both sides of a porous membrane through a method such as drop coating, blade coating, spray coating, gravure coating and the like, the non-ether polymer soluble in or insoluble in the cyclic ether compound in the mixture is intercepted on one side of the porous membrane, part of the lithium salt and the cyclic ether compound penetrate into the inside of the porous membrane and the other side under the action of gravity and capillary force, and a polymer electrolyte layer different from the inside of the porous membrane is formed on both sides of the porous membrane through ring-opening polymerization, so that the composite polymer solid electrolyte membrane is obtained.

The utility model provides a cultivation device for agricultural planting. The cultivation device for agricultural planting comprises a base, a barrel body is installed at the top of the base, a barrel cover is installed at the top of the barrel body through a fixing ring, and air holes are formed in the barrel cover. The installation pipe is installed at the bottom of the cultivation tank, the installation pipe is arranged in the through hole formed in the installation plate, the installation pipe is communicated with the interior of the base, the water guiding body is installed in the installation pipe, the bottom of the water guiding body is arranged in the inner space of the base, and the water guiding body is made of the cotton block capable of achieving capillary action. According to the device, the water diversion body is arranged on the base, so that a nutrient solution in the base can be guided into the cultivation tank through the capillary action of the water diversion body, the nutrient solution is continuously provided for the roots of crop seedlings in the cultivation tank, and compared with a spray head spraying irrigation mode in a comparison case, the device can continuously provide the nutrient solution for the seedlings without causing accumulation of water in the cultivation tank; the survival rate of seedlings can be increased.

This invention provides a raw material loading method for growing SiC single crystals using the PVT method and its application. This method cleverly utilizes the axial temperature gradient from the bottom to the top of the PVT furnace. The bottom layer (C powder) is located in a relatively low-temperature zone, its main function being to adsorb the permeated silicon liquid and initiate an in-situ synthesis reaction, while also acting as a "buffer" for the gaseous Si / C ratio. The middle layer (Si powder) is located in a medium-temperature zone (above ~1414℃), where the silicon powder can be controlled to melt, and the liquid silicon permeates downwards to the bottom C powder layer via capillary action. The top layer (SiC powder) is located in the highest temperature zone, serving as the main sublimation source, providing a stable Si-C gaseous composition, and its textured surface enhances sublimation uniformity.

The utility model relates to the technical field of sample preparation, in particular to a pipe and a workstation, the pipe comprises a first pipe body, a second pipe body and a filter element, and a mounting opening is formed in the first pipe body; the second pipe body is sleeved with the first pipe body, an inlet and an outlet are formed in the second pipe body, the inlet is located in the end, close to the mounting opening, of the second pipe body, the outlet is communicated with the interior of the first pipe body, and liquid is preloaded in the second pipe body; the supporting force of the filter element, the tension of the liquid and the capillary acting force formed by the micro channels in the filter element enable the liquid to overcome the self gravity so as to be kept in the second pipe body; the filter element is arranged on the second pipe body close to the outlet. According to the tube provided by the embodiment of the invention, the second tube body is filled with the liquid, so that the step of adding the liquid into the second tube body is omitted, the flocked swab is put into the second tube body to be soaked and does not need to be taken out, the manual operation of manually extruding the swab head and pinching a tube drop sample in the detection process is reduced, the biological safety risk is reduced, and the detection efficiency is improved.

The application discloses a passive evaporative cooling and phase change energy storage collaborative composite wall system, and relates to the technical field of building energy saving. The wall comprises, from outside to inside, an outer decorative surface ventilation layer composed of bamboo woven boards with air gaps, an evaporative cooling core layer which is an air cavity layer and is internally provided with a capillary water absorbing fabric core body, the bottom of the core body being immersed in a water tank arranged along the bottom of the wall and being wetted from bottom to top by capillary action, and a phase change cold storage layer arranged on the inner side of the evaporative cooling core layer and closely attached to the evaporative cooling core layer. The application realizes the spatial separation and functional cooperation of "external evaporative heat dissipation" and "internal phase change cold storage" in the dry column building wall. The outer layer evaporative cooling continuously creates low temperature boundary conditions for the inner layer phase change material, the inner layer phase change material keeps solid state cold storage during the whole day and actively solidifies and releases cold at night, thus solving the dilemma of poor night effect of single evaporative cooling wall and easy overheating of single phase change wall during the day.