904 results about "Surface heat" patented technology

The invention discloses a wind power blade defect data automatic acquisition and analysis method based on an unmanned aerial vehicle, and particularly relates to the technical field of data acquisition and analysis. The method comprises the following steps: collecting blade surface heat distribution data, locally applying a heat source to a blade, collecting a temperature attenuation curve, calculating a heat diffusivity gradient difference value and a temperature attenuation time index, integrating a multi-parameter space, and classifying a heat distribution abnormal region into a normal region and a real defect region in combination with a deep learning model; cross validation is carried out through optical images and ultrasonic data, so that the detection accuracy is improved; dynamically adjusting a sensitivity threshold value and model parameters of the thermal imager according to a classification result, and generating a detection report; through data feedback iterative optimization model and task planning, the problems of misjudgment and missed judgment of the thermal infrared imager in complex material distribution are effectively solved, the accuracy, reliability and automation level of wind power blade defect detection are improved, and important support is provided for efficient wind power operation and maintenance.

The invention relates to the technical field of semiconductor packaging detection, and provides a self-adaptive semiconductor packaging detection method which comprises the following steps: synchronously acquiring packaging surface heat distribution data, three-dimensional deformation data and pin electric signal data through a multi-source sensor; performing dynamic weighted fusion on the multi-modal data based on the packaging process parameters to generate a defect feature matrix; performing dynamic threshold calibration on the defect feature matrix by adopting an adaptive threshold generation algorithm according to clustering center distribution in the historical defect pattern library; performing matching judgment on the dynamic threshold value and the real-time defect feature matrix through a multi-level logic decision model, and outputting a defect type, a position coordinate and a confidence score; and based on the defect type and the confidence score, triggering adaptive compensation control of the packaging process parameters, generating a feedback control instruction, and adjusting a packaging equipment execution mechanism in real time. The packaging quality and reliability can be improved, and the production cost and the defective rate can be reduced.

The invention relates to the technical field of local heating, in particular to an intelligent temperature control system for a hot compress salt physiotherapy bag, which comprises a multi-layer tissue modeling module for calculating the heat conduction rate of a multi-layer tissue according to the heat conduction characteristic of physiotherapy bag salt particles in combination with the heat conductivity of a skin layer and the thickness of a fat layer, integrating a heat flow input value and a heat attenuation path, and calculating the heat conduction rate of the multi-layer tissue; the accumulated heat flow decreases progressively and the surface heat conduction rate is increased. According to the invention, the heat conduction rate and path are accurately predicted by combining the heat conduction characteristic of the salt particles and the heat transfer rule of the multi-layer tissue, the heat concentration or dispersion phenomenon is avoided, the heat distribution uniformity is improved, the temperature difference is monitored in real time, the power distribution is dynamically adjusted, and the temperature control precision is improved and the energy consumption is optimized; heat loss is reduced, it is ensured that the temperature is stabilized in a suitable range, the problem of overheating or supercooling is avoided, the balance of the hot compress effect is integrally enhanced, the physical therapy requirements of multiple parts are met, energy waste is reduced, and meanwhile the safety and reliability of equipment operation are improved.

The invention relates to the field of bathroom mirror LED lamp control, in particular to an LED lamp self-adaptive control method and device of an LED backlight bathroom mirror. The method comprises the following steps: acquiring a monitoring log of a bathroom mirror LED lamp, performing use time frequency distribution statistics and use behavior prediction, and generating a use behavior prediction time point; performing real-time brightness demand prediction according to the use behavior prediction time point, and performing light intensity output parameter calculation to obtain an initial light intensity output parameter; performing instant bathroom mirror illumination control according to the initial light intensity output parameter, performing mirror surface fuzzy situation analysis according to the environment humidity monitoring parameter, and constructing a mirror surface fuzzy situation evolution graph; and performing mirror surface heat effect demisting analysis and dynamic heating temperature self-adaptive adjustment according to the mirror surface fuzzy situation evolution graph to generate a self-adaptive water mist fuzzy adjustment strategy. By dynamically adjusting the illumination parameters, the clear visualization effect of the bathroom mirror under the fuzzy water mist condition is improved, and the visual effect of a user is enhanced.

The invention relates to the technical field of tunnel engineering safety, in particular to a tunnel fire multi-stage damage collaborative prediction method and system, and the method comprises the steps: constructing a data simulation fusion model, and carrying out the processing of fire and tunnel structure parameter data, and obtaining a multi-working-condition parameter database; constructing a heat conduction equation, a fire plume and wall surface heat exchange relational expression, a boundary layer correction model and a comprehensive damage evaluation model, and analyzing the equation, the relational expression and the model by utilizing a multi-physical field coupling unified boundary condition to obtain a multi-physical boundary constraint condition; obtaining a multi-physical constraint loss function based on a network architecture and a multi-physical boundary constraint condition, and further obtaining a comprehensive constraint loss function of a temperature field-stress field-damage index; constructing a PINN-LSTM network architecture and a damage evolution analysis model based on the fire ending initial state coding vector, the fire course feature vector and the cooling process feature vector; and performing linkage analysis on the function, the frame and the model to predict and monitor the transient damage and the long-term creep damage of the tunnel.

The invention discloses an aluminum alloy extrusion forming production process, which relates to the technical field of extrusion production, and comprises the following steps: designing an extrusion die, carrying out surface heat treatment on the extrusion die, selecting an aluminum alloy material, heating and extruding, carrying out surface treatment processing on a produced aluminum alloy profile, and packaging the aluminum alloy profile after the aluminum alloy profile is inspected to be qualified. Compared with the prior art, the method has the advantages that the grain structure of the profile can be more uniform and refined by accurately regulating and controlling the complex relation among parameters such as the extrusion temperature, the mold temperature, the extrusion speed and the lubricating condition, so that the mechanical property is enhanced, like a 6063 aluminum alloy profile, the tensile strength can be improved, the yield strength is improved, deformation or damage in the using process is effectively avoided, and meanwhile, the service life of the profile is prolonged. Good parameter matching can effectively reduce internal defects of the profile, metal can flow in a mold more smoothly, internal pores, cracks and other defects caused by non-uniform metal flow are reduced, and the surface quality is greatly improved.

The invention relates to the technical field of industrial vision, in particular to a ceramic glazed tile internal defect detection method based on image recognition, which comprises the following steps: acquiring multi-modal data including an X-ray tomography sequence, a surface heat map, a visible light image and production process parameters; constructing a three-dimensional digital twin based on X-ray data, fusing surface image information, and utilizing a three-dimensional segmentation network to accurately identify three-dimensional geometric features of internal and underglaze defects; carrying out physical causal reasoning on the geometrical characteristics of the defects through the constructed defect-cause knowledge graph reasoning model, and intelligently matching and identifying the physical causes of the defects; targeted correlation analysis and traceability are performed in combination with physical causes and production process parameters, production links causing defects are accurately positioned, and a control instruction for optimizing production is generated. According to the method, closed-loop defect detection of'diagnosis-traceability-control 'is realized, the defect problem can be accurately positioned, and automatic decision support is provided for optimizing production and improving product quality.

The invention provides a surface thermometer calibration system. The surface thermometer calibration system comprises a surface heat source device, a control host, a temperature control thermometer, a reference surface thermometer and a standard thermometer, the surface heat source device comprises a glass cover, a constant-temperature disc heat source, an upper protection structure, an adjustable support and a cooling fan. The control host comprises a dual-channel high-precision thermodetector, a dual-channel program-controlled output voltage-stabilized power supply and a control module, and the control module is used for obtaining measurement results of the temperature control thermometer, the reference surface thermometer and the standard thermometer and dynamically adjusting the output voltage of the dual-channel program-controlled output voltage-stabilized power supply according to the measurement results. Temperature control of the constant-temperature disc heat source is achieved. According to the surface thermometer calibration system designed and developed by the invention, the reliability and the calibration efficiency of surface thermometer calibration can be remarkably improved, and the reliability of surface temperature value traceability is ensured.

The invention discloses an integrated laser processing path planning system and method with positioning and monitoring functions, and relates to the technical field of laser processing path planning, and the method comprises the following steps: collecting information of a current to-be-processed part, including a processing surface, a processing mode and a process requirement, and generating an initial laser processing path based on the part information; the method comprises the following steps: analyzing thermal relevance of different processing surfaces, carrying out data acquisition on surface heat of the processing surfaces in a processing process based on a thermal imaging sensor, monitoring laser processing surface heat and setting a critical value, judging the temperature of the processing surfaces in a processing state based on the critical value, and generating a dynamic adjustment planning path based on a judgment result; and receiving the dynamic adjustment planning path in the machining process. The thermal imaging sensor is used for collecting heat data of the machining surface in real time, the critical value is set in combination with material attributes and machining parameters, the temperature of the machining surface in the machining process is judged, and the machining path is dynamically planned and adjusted.

The invention discloses a Gyandroid type three-period minimal curved surface primary surface heat exchanger based on a compression method, belongs to the technical field of heat exchangers, aims to solve the problem of optimizing a typical Gyandroid type TPMS (Tire Pressure Monitor System) to improve the heat exchange performance of the heat exchanger, and is technically characterized in that a compressed Gyandroid type three-period minimal curved surface core body is arranged in an accommodating space; a Gyandroid type three-period minimum curved surface core body is compressed and formed in any coordinate axis direction, a low-temperature working medium channel opening and a high-temperature working medium channel opening are formed in the surface of the compressed Gyandroid type three-period minimum curved surface core body, a low-temperature working medium channel and a high-temperature working medium channel are formed in the compressed Gyandroid type three-period minimum curved surface core body, and the Gyandroid type three-period minimum curved surface core body can be used for oil product cooling in the petrochemical industry. The heat exchanger has the advantages that the spanwise pressure drop is reduced, the heat exchange amount is increased, and the heat exchange effect of the heat exchanger is obviously improved through optimization.

The invention provides a three-period minimal curved surface change heat exchanger for airborne intermittent high-heat-flux surface heat dissipation, and belongs to the technical field of phase change heat storage. According to the technical key points, the flow channels are divided into hot fluid flow channels allowing hot fluid to pass through and preventing cold fluid from flowing and cold fluid flow channels allowing cold fluid to pass through and preventing hot fluid from flowing, and the hot fluid flow channels and the cold fluid flow channels intersect in direction and are alternately arranged to form effective heat exchange channels. A phase change material is packaged in a hot fluid flow channel by adopting a three-period extremely-small curved surface structure, and the structure is used as a primary heat exchange surface, so that rapid heat exchange between the phase change material and hot fluid is promoted, and the heat storage rate is increased; cooperative disturbance structures matched with the three-period extremely-small curved surfaces are arranged in the cold fluid flow channels, heat exchange between the phase-change materials and the cold fluid is further promoted, and the heat dissipation rate is increased. The device has the advantages of being compact in structure and high in heat storage / release rate, and the requirements of high-power equipment in the instantaneous heat storage and dissipation process are effectively met.

The invention discloses a manufacturing method of an encapsulation type driver transformer with high heat dissipation efficiency, and belongs to the technical field of power electronic equipment manufacturing. The invention aims to solve the technical problems of low heat dissipation efficiency and insufficient long-term reliability caused by limited heat-conducting property of a potting material, simple surface heat dissipation structure and difficulty in coordination of internal thermal stress of the existing driver transformer. The method comprises the following steps: constructing a three-dimensional digital model of a reinforced heat dissipation structure with a boss array and a groove array, and preparing a corresponding forming mold; a magnetic core and a winding are used as inserts to be positioned in a mold cavity, insulating colloids with different mechanical and heat conduction characteristics are poured in a vacuum environment in batches, internal gaps are fully filled with flexible colloids and stress is buffered through a segmented curing process, meanwhile, high-heat-conduction rigid colloids form an external main body and a heat dissipation structure, and an integrated potting body is formed. The method is used for manufacturing the driver transformer suitable for scenes with high power density and high heat dissipation requirements, and the heat dissipation capability and the operation reliability of the driver transformer can be remarkably improved.

The invention provides an indoor temperature field prediction method and system considering dynamic change of solar radiation, and belongs to the field of indoor temperature field prediction.The method comprises the steps that an equivalent surface heat source intensity model of direct solar radiation and an equivalent surface heat source intensity model of scattered solar radiation are constructed respectively; respectively constructing a sub-temperature field prediction model of direct solar radiation and a sub-temperature field prediction model of scattered solar radiation; and performing linear superposition on the sub-temperature field prediction model of the direct solar radiation and the sub-temperature field prediction model of the scattered solar radiation according to moments to obtain an indoor temperature field space-time distribution prediction result under the influence of dynamic solar radiation. The method fully considers the influence of the dynamic change of the solar radiation, can predict the influence rule of the solar radiation on the indoor temperature distribution in the time and space dimensions, and further obtains an accurate prediction result.

The invention discloses an interface heat conductivity coefficient distribution optimization design method and system for improving the contact thermal performance of an assembly interface, and the method comprises the steps: obtaining the contact heat dissipation surface microstructure features of a part of an electronic chip packaging system, and constructing a contact thermal performance numerical analysis model; performing multiple iterations on the heat conductivity coefficient distribution of the design area by adopting a contact thermal performance numerical analysis model to obtain the heat conductivity coefficient distribution and contact thermal resistance; judging whether each iteration meets an iteration convergence criterion or not according to the heat conductivity coefficient distribution and the contact thermal resistance; and if the iterative convergence criterion is met, outputting heat conductivity coefficient distribution and contact thermal resistance. The temperature transfer path of the assembly interface is controlled by designing the surface heat conductivity coefficient distribution of the assembly interface, and temperature gradient distribution homogenization is truly achieved by applying the innovative design thought of'heterogeneous' heat conductivity coefficient distribution.

The invention relates to a sweating heat transfer simulation device and method. The device comprises an infrared heating lamp (2) for heating a porous experiment piece (1); the position adjusting assembly (3) is used for adjusting the position of the infrared heating lamp (2); the fixing base (4) is used for mounting and fixing the porous experiment piece (1); and the fixed base (4) is provided with a liquid supply inlet and a measuring port. Compared with the prior art, the device can be used for simulating the sweating heat transfer process of the high-temperature surface of the porous part, and the change process of the surface heat dissipation condition under different hydraulic conditions, different porous styles and different heat flux densities is obtained.

The invention relates to the technical field of metal surface heat treatment, and discloses a fixed inductor for high-speed rail axle surface induction quenching, which comprises a busbar, a fixed plate, a cooling water sprayer and an effective geometry heating ring, the busbar is used for fixing the effective geometry heating ring and forms an electrifying passage and a water passing passage with the effective geometry heating ring with the hollow structure; the effective geometric body heating ring comprises three sections of straight section induction pipe bodies with different lengths and two sections of arc induction annular bodies, the straight section induction pipe bodies are arranged according to the lengths D1, D2 and D3, the straight pipe section D1 and the straight pipe section D2 are in arc transition through an R1, the straight pipe section D2 and the straight pipe section D3 are in arc transition through an R2, and the three straight pipe sections are parallel to one another and progressive inwards layer by layer; and the radians of the two sections of arc induction annular bodies are 90 degrees. According to the invention, one-time and global synchronous induction heating can be carried out on multiple sections of shaft necks and transition R-angle areas with complex geometrical shapes and obvious stress concentration at the two ends of the axle.

The invention relates to the technical field of energy-saving materials, and discloses a preparation method of a self-assembled multilayer radiation refrigeration film, the self-assembled multilayer radiation refrigeration film comprises: a surface coating composed of a super-hydrophobic coating and used for providing anti-fouling and self-cleaning functions; the top layer is composed of titanium dioxide nanoparticles and has high sunlight reflectivity; the middle layer is a polytetrafluoroethylene layer with a hierarchical porous structure and provides thermal insulation and efficient mid-infrared emission; the bottom layer is composed of graphene oxide, has high heat conduction performance and promotes heat transfer; and the substrate is a flexible polyester film PET and is used as a supporting structure. Through the titanium dioxide nano-particle design of the top layer and the graded porous structure of the middle layer, the film achieves the reflectivity exceeding 90% in the sunlight band (400-2500nm), meanwhile, the film has the radiance exceeding 85% in the middle infrared band (8-13mu m), and due to the optical performance, surface heat absorption can be remarkably reduced under the intense sunlight condition.

The invention provides an intelligent window with spectrum regulation and control and phase change energy storage functions and a preparation method of the intelligent window, and belongs to the field of door and window equipment. The intelligent window comprises a first high-light-transmittance film, temperature-sensitive gel, a second high-light-transmittance film and a phase change composite material which are sequentially stacked. According to the invention, the temperature-sensitive gel plays a role in spectrum adjustment, before and after phase change, the temperature-sensitive gel is converted from transparent to opaque, the sunlight transmittance is significantly reduced, the light transmittance is significantly reduced when the temperature rises to be close to the phase change temperature of the temperature-sensitive gel, and the entry of solar heat is reduced; the phase-change composite material can absorb heat on the surface of the window, increase thermal inertia of the window, slow down temperature rise of the surface of the window, reduce indoor thermal radiation and convection of the window, release heat at night, delay temperature drop of the window, change from opaque to transparent before and after phase change, and remarkably improve sunlight transmittance. The temperature is continuously reduced at night, high haze is presented, and the privacy protection effect is achieved.

The invention discloses a coating process for a thermal insulation coating of a container type mobile power supply box for a ship, which sequentially comprises the following steps of: treating a base surface before spraying, spraying epoxy zinc-rich refrigeration primer, spraying radiation refrigeration finish paint and spraying self-cleaning colored epoxy finish paint, the heat insulation coating sequentially comprises a refrigeration primer layer, a radiation refrigeration paint layer and a color epoxy finish paint layer from bottom to top; through the coating of the invention, the heat dissipation capability of the surface is improved due to the high reflection performance of the material, the heat insulation effect of the surface of the container type mobile power supply for the ship is realized, and internal equipment is ensured to work within a safe temperature range. Heat on the surface of the box-type power supply container is efficiently transmitted to the outer space low-temperature background in an infrared radiation mode through the atmospheric transmission window, the passive heat insulation effect of the container-type mobile power supply box body is achieved, the box body heat insulation coating technology does not need extra energy consumption, and the zero-energy-consumption characteristic is achieved.

The utility model provides a water cooling device based on a cable plastic extruding machine, which comprises a support frame, a cooling box arranged at the upper end of the support frame, and a plurality of uniformly distributed support legs arranged at the lower end of the support frame, and is characterized in that a discharge hole is formed in the right side of the cooling box, and a feed hole is formed in the left side of the cooling box; and two partition plates which are symmetrically distributed left and right, an electric control module, an air blowing module and a water supply module are arranged in the cooling box. According to the water cooling device based on the cable plastic extruding machine, a certain amount of cooling water can rapidly evaporate and absorb heat on the surface of a cable so as to rapidly and efficiently realize water cooling of the cable, and cold air blown by the air cooler accelerates surface heat dissipation on the outer arc surface of the cable through forced convection; and water cooling of the cable is assisted, so that the cable extruded by the cable plastic extruding machine is quickly and efficiently cooled.

The invention discloses a cooling mechanism for a high-toughness light-weight zinc-aluminum alloy casting mold, and relates to the field of casting mold cooling displacement. A high-toughness light-weight zinc-aluminum alloy casting mold cooling mechanism comprises a forming box, a forming cavity is formed in the top of the forming box, a cooling cavity wrapping the forming cavity is formed in the forming box, and a composite cooling layer covering the outer side of the wall body of the forming cavity is installed on the inner wall of the cooling cavity. The composite cooling layer comprises an inner frame, a middle frame and an outer frame from inside to outside, through holes I are respectively formed in wall bodies of the inner frame, the middle frame and the outer frame, and the porosity of the through holes I is gradually reduced from the inner frame to the outer frame, so that a gradually-shrinking micro-channel network is formed; a cooling medium is guided in from the inner layer at a high speed through a gradually-reduced micro-channel of the composite cooling layer, and heat on the surface of the forming cavity is preferentially absorbed; by means of the porosity decreasing characteristic of the inner frame, the middle frame and the outer frame, a miniature channel is formed, the speed of flowing-out liquid is decreased from low to high, the contact time of the inner side is prolonged, and heat exchange of a high-heat-capacity area is enhanced.

The invention relates to the technical field of heat exchangers, in particular to a baffling type three-period tiny curved surface heat exchanger which comprises a shell, a three-period tiny curved surface structure is installed in the shell, a top cover is installed above the shell, a hot fluid inlet pipe is arranged at the center of the front end of the shell, and a hot fluid outlet pipe is arranged at the center of the rear end of the shell. A cold fluid inlet pipe vertically penetrating into the shell is arranged on the left side of the upper end of the top cover, and a cold fluid outlet pipe vertically penetrating into the shell is arranged on the right side of the upper end of the top cover; the inlet of the hot fluid inlet pipe and the outlet of the hot fluid outlet pipe are both sleeved with first dustproof pipes. According to the heat exchanger, dust can be prevented from entering the heat exchanger, normal operation of the heat exchanger is guaranteed, the heat exchanger is easy to disassemble, and internal assemblies are convenient to repair.

The invention discloses a bidirectional reverse flow type structure micro-channel radiator, which comprises a first substrate, a second substrate and a cover plate which are sequentially stacked from bottom to top, two first micro-channels are arranged on the first substrate, a plurality of concave cavities and a plurality of convex ribs are arranged on two side surfaces of each first micro-channel, and cooling liquid outlets are formed in two ends of each first micro-channel; a first cooling liquid inlet and a second cooling liquid inlet are formed in the two sides of the second substrate, two sets of second micro-channels are arranged in the middle of the second substrate, one set of second micro-channels are communicated with the first cooling liquid inlet, the other set of second micro-channels are communicated with the second cooling liquid inlet, drainage pipes are arranged at the tail ends of the second micro-channels, and the positions of the drainage pipes correspond to those of the first micro-channels. And the flowing directions of cooling liquid in the two groups of second micro-channels are opposite. According to the invention, through the arrangement of the bidirectional countercurrent micro-channel, a heat exchange dead zone caused by too small temperature difference at the tail end of a traditional downstream micro-channel is avoided, the surface heat dissipation uniformity of the whole radiator is improved, the surface temperature gradient of a to-be-cooled device is reduced, and the heat dissipation efficiency is effectively improved.

The present invention provides a temperature field analysis method and system for natural air cooling of a control rod drive mechanism. The analysis method comprises: establishing a control rod drive mechanism model, and setting different external air temperatures to perform simulation to obtain corresponding surface heat fluxes and first surface temperatures of the control rod drive mechanism model under different thermal loads; establishing a natural air cooling model, and performing simulation on the basis of the surface heat fluxes to obtain second surface temperatures of the control rod drive mechanism model; and on the basis of an interpolation method, determining a balance point temperature between the first surface temperatures and the second surface temperatures, wherein the control rod drive mechanism model comprises an internal flow channel, and the natural air cooling model is an integrated head package natural air cooling model. On the basis of the principles of sensitivity analysis, thermosyphon of a single drive mechanism model and natural air cooling of a full-field model are subjected to two-way coupling analysis, and finally, a drive mechanism surface heat flux and temperature field calculation result is obtained.

The invention discloses a thermal power plant boiler combustion adjusting and optimizing method and system, and relates to the technical field of thermal power plants. By arranging the boiler pipeline three-dimensional digital twinborn visualization module, the thermal power plant data analysis supporting platform, the heating surface wall temperature monitoring module and the heating surface heat absorption monitoring module, the combustion optimization effect is evaluated, and thermal power plant boiler combustion data and corresponding analysis results are managed, visualized and stored; energy management can be realized through internet cloud management and control, the intelligent level of combustion management of the boiler of the thermal power plant is improved, the combustion efficiency can be effectively improved, pollution emission can be reduced, the service life of equipment can be prolonged, and the automation level can be improved by optimizing operation parameters, reducing abrasion and corrosion of the boiler, prolonging the service life of the equipment and reducing the maintenance cost; and technical support is provided for green sustainable development of a thermal power plant.

The invention provides an air-cooled array surface structure adopting a vapor chamber frame, which comprises a vapor chamber array surface frame, an antenna cover, a receiving and transmitting assembly, an antenna, a shell, a connector, a temperature monitoring unit, an array surface distribution plate, a high-power-consumption functional module, a low-power-consumption functional module, a temperature control module, a large-air-volume axial flow fan, an internal turbulent flow fan and a semiconductor refrigerator, a semiconductor refrigerator cold end, a semiconductor refrigerator hot end, a loop heat pipe, a loop heat pipe cold end, a loop heat pipe hot end, an air duct cover plate, a rear cover plate, a rear cover plate external groove, a rear cover plate internal groove, a sealing rope, a fan protective cover, captive screws and trunnions are included. According to the design of the invention, the array surface heat dissipation mode is changed from liquid cooling to air cooling, the design requirements of light weight and low cost of the array surface structure are realized, and the effect of the heat dissipation system and the redundancy design is verified step by step in the high-temperature environment test process to meet the requirements.

The invention belongs to the technical field of electric heating deicing, and particularly relates to a surface heating electric heating film and a preparation method thereof. Comprising an outer surface insulating layer, a heating layer, a power supply electrode and an inner surface insulating layer, the heating layer is prepared from a carbon-based conductor composite polymeric material in a printing or coating mode, and the carbon-based conductor composite polymeric material is formed by mixing polyimide resin and carbon fibers (or one or more of graphene, carbon nanotubes and the like). The surface heating electric heating film provided by the invention has the characteristics of simple and reliable structure, light weight and surface heating performance, can be applied to ice prevention and removal operation of parts such as aircraft wings, empennages, propellers and the like, and has relatively high practical application value.

The invention belongs to the technical field of wireless charging magnetic attraction rings, and particularly discloses an insulating magnetic attraction ring based on a modified surface heat dissipation layer and a preparation method of the insulating magnetic attraction ring. The insulating magnetic ring comprises a composite insulating material substrate, a magnet and a modified surface heat dissipation layer, the composite insulating material substrate is composed of a high polymer material and reinforced fibers, and the magnets are located in the grooves of the composite insulating material substrate; the modified surface heat dissipation layer covers the surface of the magnet and the surface of the composite insulating material substrate and comprises inorganic micro-nano heat conduction and heat dissipation powder. The magnetic ring prepared by the invention can avoid hysteresis effect, reduce heat generation and improve charging efficiency and safety; the modified surface heat dissipation layer and the composite insulating material substrate also have excellent heat dissipation performance, heat generated by charging equipment or a magnet can be quickly dissipated into air, the charging safety is improved, and the charging power is ensured; the heat-dissipation insulating magnetic ring prepared by the invention has supporting performance and can be used as a mobile phone support, so that the practicability and convenience of the product are improved.

The utility model relates to the technical field of heat transfer printing equipment, in particular to a hot press which comprises a body, a holding part and a hot plate. Wherein the holding part is arranged on the body, the hot plate is arranged on the lower portion of the body and is provided with a pressing face and at least one curved surface pressing part, and the curved surface pressing part is limited by a concave part at the lower end of the hot plate. According to the hot press, at least one concave curved surface pressing part is constructed on the pressing surface, when a user needs to conduct heat transfer printing on an arc-shaped part, heat transfer printing can be achieved through the curved surface pressing part, and therefore the hot press achieves plane heat transfer printing work and curved surface heat transfer printing work, and is good in economical efficiency and high in overall utilization rate.

The invention relates to a to-be-cut solar cell and a photovoltaic module, and the cell comprises a cell body, and the surface of the cell body is provided with a laser heating enhancement region; the laser heating enhancement area is provided with a light trapping part and a heat absorption part, and a to-be-cut line of the battery piece body is located in the laser heating enhancement area; the light trapping part is arranged on the surface of the laser heating enhancement area; the heat absorption part and the light trapping part are at least partially overlapped, and the heat absorption part is arranged on the to-be-cut line. The light trapping part can improve the light incidence effect and increase the utilization rate of laser energy, the heat absorption part can absorb laser and heat around the light trapping part so as to improve the temperature of laser cutting at the position of the to-be-cut line, and therefore under the condition that low laser output power is adopted, the laser cutting efficiency is improved. The heat on the solar cell is not reduced, the effect of cutting the solar cell can still be realized, the damage to the surface of the solar cell is reduced, the power loss of the solar cell is reduced, and the power generation efficiency and long-term reliability of the photovoltaic module are improved.