760 results about "Snow melting" patented technology

The invention relates to the technical field of snow melting disaster early warning, in particular to a snow surface rain disaster identification method based on a high and cold mountainous area and a related product, and the method comprises the steps: constructing a snow surface rain disaster single-point identification rule capable of being physically explained by using meteorological observation data and remote sensing inversion data of a small amount of weather stations in the high and cold mountainous area; the method is advantaged in that classification is carried out without depending on a black box model, precision and interpretability of single-point snow surface rain event discrimination are improved, regional popularization is carried out through dynamic downscaling simulation of a regional climate mode WRF coupling land surface process model Noah-MP, a point-surface fusion snow surface rain disaster discrimination and identification system is constructed, and the method is advantaged in that the method is simple and convenient to operate. The method is suitable for identifying snow rain disasters in complex terrain areas with high and cold areas, high altitude, large gradient, lack of data, even no data and the like, and solves the technical problems of insufficient snow rain disaster space identification capability and low precision caused by sparse observation data in the high and cold mountainous areas in the prior art.

The invention relates to the technical field of road ice melting, and discloses a road ice melting implementation system and method. The system comprises a meteorological monitoring platform, a snow-melting agent spraying platform and a management and control platform, the method comprises the following steps: firstly, collecting meteorological data and monitoring a road surface state to obtain an initial road ice melting data set, and then carrying out anomaly detection and filling missing data; establishing a road ice melting prediction model based on the neural network, predicting whether the road is iced or not, and outputting a road icing result; then ice melting work is carried out, an enhanced hawk optimization algorithm is introduced to optimize spraying parameters in the ice melting work, and a road ice melting implementation strategy is generated; and finally, adjusting a road ice melting implementation strategy, and establishing a snow melting environment coupling model and an alarm mechanism. By analyzing and processing the road ice melting data, the purpose of implementing road ice melting is achieved, and the method is objective and accurate.

The invention discloses a cold region land surface process river water and sediment model construction method, which comprises the following steps: selecting a target research drainage basin, extracting a drainage basin range ROI (Region of Interest), and collecting water and sediment data and related basic data in the drainage basin range; calculating a thermal erosion amount caused by temperature rise in the river reach, a snow melting erosion amount caused by snow melting, a water erosion amount induced by rainfall and a river ice erosion amount caused by ice running or flow ice scraping erosion of river ice in winter and spring; selecting landform characteristic parameters according to a river flow direction to construct a sediment transport coefficient of a river reach, establishing a cold region river water and sediment model according to the sediment transport coefficient and each erosion source item, and obtaining a sediment content simulation result based on the established cold region river water and sediment model; and evaluating the simulation performance of the model based on the established evaluation index. The method can dynamically respond to the erosion sand production and runoff sand transportation process of the cold region, provides timely and high-precision sand content calculation, and has important significance on water and soil conservation management and water and sand risk regulation and control of the cold region.

The invention discloses a numerical simulation method, device and equipment for ice rock collapse starting and a medium, relates to the technical field of fluid motion simulation, and provides an FDEM-SPH coupling framework. Through a CIE unit in the FDEM method, crack propagation and fracture processes in rock masses are accurately simulated, and after the CIE unit is completely fractured, the FDEM method simultaneously simulates various contact forms between two separated finite units, so that mutual movement and interaction between fractured rock masses can be accurately described; ice and snow melting and movement in the ice-water phase change process are simulated through the smoothed particle flow SPH, and meanwhile, the interaction between ice-water phase change and rock mass fracture movement can be quantified by calculating the contact force between virtual particles in the smoothed particle flow SPH and the surface of a finite element in the finite discrete element method FDEM; the interaction reflects the erosion and impact of the ice-water phase change on the rock mass in the whole process and the actual physical condition in the ice rock collapse starting process, so that the ice rock collapse change more fitting the real condition is described.

The invention belongs to the technical field of road deicing, and particularly relates to an environment-friendly snow and ice removing vehicle which comprises a vehicle body, an ice and snow removing device, a heating system and a water treatment system, the vehicle body is provided with an equipment bin, an ice and snow melting bin and an anti-freezing water bin, and a PV / T device used for providing electric energy for a motor and a vehicle-mounted hydrogen production device of the vehicle body is laid on the vehicle body; the ice and snow removing device is used for conveying ice and snow into the ice and snow melting bin; the heating system is used for heating ice and snow in the ice and snow melting bin; the water treatment system comprises a cyclone desanding device, an electrochemical disinfection device and a reverse osmosis device which are sequentially communicated, the cyclone desanding device is communicated with the ice and snow melting bin and used for removing large-particle impurities in water, the electrochemical disinfection device is used for removing microorganisms in the water, a water outlet of the reverse osmosis device is communicated with the anti-freezing water bin, and a water outlet of the reverse osmosis device is communicated with the ice and snow melting bin. And the water desalted and purified by the reverse osmosis device is discharged into the anti-freezing water sump. The system has the beneficial effects that the energy utilization efficiency is improved, and cyclic utilization of water resources is achieved.

The invention discloses a runoff forecasting method of an EMD-BiLSTM model based on a snow melting multi-source factor, and the method comprises the steps: firstly building a prediction data set based on multi-source accumulated snow remote sensing data in combination with a hydrological station control basin and a snow melting confluence production process in an alpine region, and carrying out the preprocessing of the data set, performing time-frequency analysis on the runoff sequence by adopting an empirical mode decomposition method, decomposing a complex runoff signal into a plurality of basic mode components, and averaging the mode components to obtain an interpretable runoff change signal; a BiLSTM model is utilized to train a data set, meanwhile, an attention mechanism is introduced, a Bayesian optimization algorithm and a gradient cutting technology are adopted in the training process to determine an optimal hyper-parameter, and the problem of gradient explosion in the back propagation process is prevented. According to the method, high-precision prediction of the daily runoff of the alpine hydrological control basin is achieved through the model, and the method has high stability and generalization ability and is suitable for runoff prediction and water resource management in alpine regions.

The invention provides a spectrum prediction method of a snow ablation optimization algorithm based on chaotic mapping good point set initialization and simulated annealing, a program, equipment and a storage medium. The improved snow ablation optimization algorithm is adopted to optimize key parameters in the spectrum prediction model, the positions of individuals in the population are initialized based on the chaotic mapping good point set, and the uniformity and randomness of the initial population are effectively improved; on the basis of a double-population mechanism of the snow ablation optimization algorithm, one population keeps an original individual position updating mode, the other population introduces a probability acceptance mechanism of simulated annealing, a neighborhood solution is accepted at a certain probability to update the position of an individual, and the global search ability of the algorithm is enhanced; the disturbance amplitude in the search process is controlled by using a temperature attenuation mechanism, the convergence speed is improved, the optimization precision is improved, and the robustness of the algorithm is enhanced. Compared with other algorithms, the method is better in effect, the prediction performance is greatly improved, and the method can be suitable for different channel environments.

The invention discloses an alpine region snow melting drought monitoring device, and relates to the technical field of environment monitoring equipment, the alpine region snow melting drought monitoring device comprises a bottom plate, the bottom plate is provided with an adjusting storage switching mechanism, and the top of the adjusting storage switching mechanism is provided with an automatic real-time angle adjusting mechanism; according to the snow melting and drought monitoring device for the alpine region, horizontal rotation of the solar photovoltaic panel is achieved through the arranged automatic real-time angle adjusting mechanism; meanwhile, the solar photovoltaic panel is always at the optimal lighting angle, the solar energy utilization efficiency is improved, the angle of the solar panel is adjusted through one driving source, the manufacturing cost of the device is reduced, and the problems that in the using process of an existing device, the angle of the solar panel is inconvenient to adjust in real time, and the using cost is low are solved. The problems that the solar cell panel cannot be always in the optimal lighting angle due to the fact that the solar cell panel cannot be in the optimal lighting angle, the angle of the solar cell panel is adjusted through two driving sources of a motor and an air cylinder, the manufacturing cost of the device is increased, and meanwhile energy consumption is increased are solved.

The invention discloses an efficient regulation and control method and system for water resources in a cold region under soil erosion, and the method comprises the steps: collecting regional weather, soil and crop data, and dividing a space grid unit; constructing a freeze-thaw period water balance model, and simulating day-by-day soil water content and snow melting water dynamics; an irrigation-yield correlation model and an improved soil erosion model are established, and the driving effect of irrigation water quantity on crop growth and soil loss is quantified; designing a yield, water saving amount and erosion amount three-objective optimization function, generating a Pareto optimal solution set by adopting a third-generation non-dominated sorting genetic algorithm (NSGA-III), and optimizing an irrigation scheme in combination with a decision algorithm. The method has the advantages that the limitation of traditional single target regulation and control is broken through multi-model coupling, and accurate quantification of the contribution rate of the irrigation water amount in soil erosion is achieved; the water and soil loss risk of the high-gradient area is effectively reduced based on the differential regulation and control strategy of the space grid, and meanwhile the water demand of crops is guaranteed; the black soil area water resource utilization efficiency is improved, and cultivated land degradation is inhibited.

This invention provides a method and application for the comprehensive utilization of chlor-alkali salt mud solid waste to prepare a composite de-icing agent, belonging to the field of comprehensive utilization of solid waste resources and composite material synthesis technology. The invention first prepares a slurry by mixing chlor-alkali salt mud with water. Then, under the action of an acidification aid and an ionic liquid, organic and inorganic acids are added in a single step, followed by precipitation of the composite de-icing agent in an alcohol precipitation solution. The method of this invention achieves a salt mud utilization rate of 86.55-88.85% and an effective component extraction rate of 96.70-99.27%, especially for Ca... 2+ Na + K + Mg 2+ Al 3+ The extraction rates reached 95-99.99%, 99.9%, 99.9%, 85.5-95.0%, and 80.5-90.0%, respectively, and also improved the extraction efficiency of Ca in the solution. 2+ Na + K + Mg 2+ Al 3+ The precipitation rates reached 95.5-99.5%, 75.5-80.5%, 72.5-75.5%, 95.5-99.5%, and 71.5-75.5%, respectively, and the product yield reached 90.80-95.08%. It has broad prospects for snow melting and ice removal in low-temperature environments of -15℃ to -20℃.

The invention relates to the field of inspection unmanned aerial vehicles, in particular to an overhead line power inspection unmanned aerial vehicle. An overhead line electric power inspection unmanned aerial vehicle comprises an unmanned aerial vehicle body, a camera and the like. And four cameras are mounted on the unmanned aerial vehicle body. According to the unmanned aerial vehicle, by controlling the releasing length of the mooring rope, the strength of the deicing bar for impacting the cable body is controlled, so that deicing work of overhead cables of different thicknesses is achieved, damage to the cable body is reduced, and after the folded deicing bar is limited through the guide column and the limiting sleeve, the situation that the deicing bar and the unmanned aerial vehicle body move asynchronously is effectively avoided, and the deicing efficiency is improved. And the heater melts ice and snow attached to the surfaces of the ice removing bars after impacting the cable body, and the situation that the ice and snow attached to the surfaces of the ice removing bars are increased, the overall load of the unmanned aerial vehicle body is increased, energy consumption of the unmanned aerial vehicle body is increased, and the endurance time of the unmanned aerial vehicle body is shortened is avoided.

The invention relates to a road snow melting device as well as a preparation method and application thereof. The road snow melting device comprises a stable base layer and a thermal resistor, the stable base layer comprises an energy storage body, and the energy storage body can play a structure supporting role; the energy storage body is connected with external electric energy and the thermal resistor through wires. The preparation method of the energy storage body comprises the following steps: preparing cement-based printing slurry; filling the cement-based printing slurry into a 3D printing device, and stacking layer by layer to form a printing body; curing, maintaining, trimming and drying the printing body, and immersing the printing body into a soluble alkali / salt solution to obtain a cement-based electrolyte; a soluble alkali / salt solution is dropwise added to the surface of the electrode, then the electrode and the cement-based electrolyte are stacked and assembled, and an assembly is obtained; sealing and packaging the assembly body to obtain an energy storage body; a printing interlayer interface of the cement-based electrolyte has a directionally arranged pore structure, the pore diameter is 0.5-20 microns, and the porosity is 10-50%; and the hole orientation of the hole structure is consistent with the ion migration direction between the electrodes.

The invention relates to a control method and device of snow melting equipment, the snow melting equipment and a storage medium, and the control method comprises the following steps: when the snow melting equipment is in a smoothie making mode, obtaining a first rotating speed of a stirrer; if the first rotating speed is smaller than the preset rotating speed, controlling the compressor to stop working, and meanwhile, controlling the stirrer to continuously run for first duration; acquiring a second rotating speed of the stirrer after the first duration; if the second rotating speed is smaller than the preset rotating speed, the stirrer is controlled to stop working, and meanwhile, a refrigerant reversing valve of the compressor is controlled to perform primary reversing to enter an ice melting mode. According to the technical scheme, the technical problems that when beverage smoothie with the high water content is made through traditional snow melting equipment, water in the beverage smoothie is prone to icing on the surface of the refrigeration cylinder, stirring of the stirrer is affected, smoothie making is affected, and the user experience is poor are effectively solved.

The invention provides an ice and snow pavement simulation experiment test method and system, and relates to the technical field of intelligent construction of road engineering, and the method comprises the steps: obtaining test pavement data; acquiring molten accumulated water data; acquiring simulation test data; determining a test environment severe coefficient according to the pavement ice and snow density and the simulation test data; determining a comprehensive melting effect coefficient according to the pavement friction coefficient, the pavement ice and snow thickness and the melting accumulated water data; determining a snow-melting agent effect coefficient according to the test environment severe coefficient and the comprehensive melting effect coefficient; obtaining a second pavement ice and snow thickness; determining an anti-re-freezing effect coefficient according to the second pavement ice and snow thickness; and determining a test report according to the snow-melting agent effect coefficient and the anti-re-freezing effect coefficient. According to the invention, a low-cost repeated road ice and snow melting experiment under a controllable ice and snow environment condition can be realized, and the data stability is relatively good.

1. The name of the design product: snow melting machine (1L). 2. The use of the design product: food processing equipment for making edible ice and snow (such as smoothie, snow ice, and food decoration ice chips). 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: front view. 5. The A, B and C parts of the design product are translucent.

The utility model relates to the technical field of snow melting machine water tanks, and discloses a snow melting machine water tank with spring locking mechanisms, which comprises a water tank body, locking mechanisms are arranged on the front side and the rear side of the water tank body, a snow melting machine body is movably connected to the right side of the water tank body, pushing mechanisms are arranged on the front side and the rear side of the water tank body, and each locking mechanism comprises a connecting frame. The connecting frames are fixedly connected to the outer wall of the water tank body, springs are fixedly connected to the inner sides of the connecting frames, connecting blocks are fixedly connected to the bottom ends of the springs, connecting shafts are fixedly connected to the tops of the connecting blocks, and clamping blocks are fixedly connected to the bottoms of the connecting blocks. According to the snow melting machine water tank with the spring locking mechanism, the connector size is accurately matched, the self-positioning and guiding functions are achieved, the butt joint difficulty is greatly reduced through the simple and visual connector design, an operator can rapidly and accurately connect the water tank with a snow melting machine, the installation time is shortened, and the installation efficiency is improved. And the turnover efficiency of the equipment can be improved in the peak period of beverage making, and the timeliness of beverage supply is ensured.

The invention discloses a sediment prediction method and system for oscillation period strategy snow ablation optimization, and the method comprises the steps: obtaining sediment data characteristics, enabling a drainage basin to comprise a plurality of nodes, and calculating the snow melting runoff of each node according to the sediment data characteristics; according to the snow melting runoff of each node, calculating the initial sand production concentration of each node; and constructing a sediment prediction model, inputting sediment characteristic data and corresponding actual sediment concentration to the sediment prediction model to obtain a trained sediment prediction model, inputting real-time sediment data to the trained sediment prediction model, and outputting predicted sediment concentration by the trained sediment prediction model. According to the method, historical sediment data are acquired, and a graph convolutional neural network is constructed for learning complex nonlinear mapping from snow melting-runoff generation to sediment transportation, so that the problems of weak generalization ability and strong data dependence of an existing snow melting period sediment prediction method are solved.

The invention relates to the technical field of intelligent control, and discloses a self-adaptive snow melting method and system for a photovoltaic snow protection shed tunnel, and the method comprises the steps: collecting the multi-mode real-time data of the surface of a photovoltaic panel; calling a digital twin physical model, and calculating a first heating control parameter corresponding to a theoretical energy demand required for melting the current accumulated snow; calling the neural network model to predict and obtain a second heating control parameter; performing dynamic weight fusion on the first heating control parameter and the second heating control parameter by using a weight factor to generate a final heating control parameter; and according to the final heating control parameter, driving a heating unit to perform snow melting operation on the photovoltaic panel, and updating the weight factor and / or the neural network model parameter based on the real-time feedback of the surface temperature of the photovoltaic panel. The objective of the invention is to overcome the cold start problem caused by high dependence on historical data and the defect of limited control precision and energy efficiency caused by lack of a precise physical model in the prior art.

The utility model relates to the technical field of road snow melting, in particular to a high-efficiency gravity type inorganic heat pipe for road snow melting, which comprises an evaporation pipe, a silicon carbide pipe is sleeved on the outer side of the evaporation pipe, and working fluid is filled in the evaporation pipe. A plurality of fins are arranged on the surface of the condensation cavity pipe, and a heat insulation cavity pipe is arranged between the condensation cavity pipe and the evaporation pipe; the device has the advantages that the whole device is of an inverted-L-shaped structure, the evaporation pipe of the device is embedded into a roadside roadbed, then the condensation cavity pipe is partially embedded into a pavement asphalt layer with the fins facing upwards, in the snow melting process, the temperature of the evaporation pipe is high, the temperature of the condensation cavity pipe is low, and working liquid in the evaporation pipe evaporates from the evaporation pipe and flows upwards to the condensation cavity pipe; and heat is released and condensed on the upper wall of the condensation cavity pipe and the fins, and then flows back to the evaporation pipe under the action of gravity, so that efficient transfer of heat is realized, the environment is protected while efficient snow melting is realized, and the problems of low snow removal efficiency and damage to the environment and the road surface are avoided.

The invention discloses an environment-friendly snow melting agent which is mainly prepared from the following raw materials in percentage by mass: 20-50% of potassium acetate, 10-16% of potassium chloride, 4-10% of calcium chloride and calcium acetate, 3-7% of magnesium chloride, 10-30% of an ice-resistant binder, 11-17% of a soil protective agent, 5-6% of cellulose and 3-9% of a plant protective agent. The ice-resistant binder is one or a combination of more of calcium acetate, magnesium acetate, potassium acetate and potassium formate, the mass ratio of calcium acetate to magnesium acetate is 3: (7.5-8.5), and the soil protective agent comprises 5-15% of diatomite and 10-20% of bentonite. Compared with the prior art, the environment-friendly snow melting agent disclosed by the invention can reduce the freezing point, prevent adhesion of an ice layer and a road surface and accelerate melting of an ice surface, so that a melted ice-snow-water mixture is easier to remove, effective recycling of resources is realized, pollution to the environment is reduced, and meanwhile, the treatment pressure of wastes is reduced.

The invention discloses a pavement snow melting and deicing method and system based on geothermal energy tunnel heat storage, and relates to the field of pavement of roads, in the method, a second heat exchange pipe network is closed and a first heat exchange pipe network is opened within a first time period; opening a second heat exchange pipe network in a second time period when the road surface temperature is lower than a preset first temperature threshold value; calculating target heat; the first heat exchange pipe network is controlled to dissipate the current heat to the road surface; and when it is determined that the current heat stored in the first heat exchange pipe network is smaller than the target heat, the circulating working medium flow of the first heat exchange pipe network and the circulating working medium flow of the second heat exchange pipe network are adjusted, the heat pump system is controlled to heat the circulating working medium, and the road surface temperature is kept within the preset temperature range. The closed-loop circulation system is formed by the heat exchange pipe networks of the tunnel bottom plate lower cushion layer and the pavement structure layer, and the heat pump system is combined, so that the dual functions of collection and storage of pavement heat in summer and snow melting and deicing in winter are achieved, the heat supply capacity of the system is improved, and the snow melting and deicing effects are improved.

The invention provides a method and system for inverting a degree-day factor based on a snow water equivalent difference value and used for snow melting forecasting, and relates to the technical field of hydrological remote sensing. The method comprises the following steps: firstly, acquiring and unifying multi-source snow water equivalent data and meteorological elements such as air temperature, radiation, wind speed and relative humidity to form a standardized input data set, generating assimilated snow water equivalent by adopting data assimilation fusion, and calculating uncertainty; judging a snow melting process by combining meteorological conditions and uncertainty, calculating a pixel scale daily factor when snow melting is judged, and constructing a space-time database; spatial and temporal features are extracted by using a convolutional neural network and a long short-term memory network, historical sample degree-day factor distribution is obtained based on similarity matching for prediction, the snow melting amount is calculated, and the uncertainty is estimated, so that the snow melting simulation and prediction precision is improved.

The utility model relates to a cornice aluminum plate curtain wall construction system of an upright quadrangular pyramid grid roof built-in snow melting system. The cornice aluminum plate curtain wall construction system comprises a steel keel and concrete structure connecting system, a steel keel ground jig frame accurate assembling system, a steel keel whole truss hoisting system and a gutter cornice snow melting system. According to the steel keel and concrete structure connecting system, the transverse and vertical keels are reasonably stressed, the overall performance of the wall is good, the firmness degree of the steel keel and the building body is improved, and good technical and economic benefits are achieved; according to the precise assembling system for the steel keel ground jig frame, the auxiliary control assembling precision is improved, errors generated during construction assembling are reduced, the situation that assembling construction of keel units on the ground is inconvenient is avoided, and the assembling construction efficiency is improved; when the steel keel whole truss hoisting system hoists the keel main body, through limiting and fixing arrangement of the clamping pieces, the stability of the keel main body during use is guaranteed, and the construction risk of steel keel whole truss hoisting is reduced.

The snow melting machine comprises a base, a refrigeration barrel, a heat preservation barrel, an ice scraping knife, a constant-temperature circulating system and an ice outlet assembly, a liquid inlet is formed in the top of the refrigeration barrel, and an ice outlet is formed in the bottom of the side wall of the refrigeration barrel; according to the snow melting machine, the refrigeration barrel and the heat preservation barrel are arranged, refrigerants in the refrigeration barrel and the heat preservation barrel are used for jointly absorbing heat of water in the refrigeration barrel to form ice, ice scraping knives are matched for stirring the ice to form smoothie, rapid smoothie is achieved, and then a constant-temperature circulating system is arranged and connected with a second liquid storage cavity; the temperature of a refrigerant in the heat preservation barrel is controlled to be below a set value, scraped smoothie can be stored at a constant temperature, a user can drink smoothie with the unchanged taste at any time, the whole structure is practical and reliable, and the cost is lower.

The snow melting machine housing structure convenient to clean comprises a housing, a discharging faucet is arranged on the housing, a feeding port is formed in the upper side of the housing, a feeding cover capable of being opened is arranged at the position of the feeding port, an opening is formed in the rear side of the housing, a cover cap is arranged at the position of the opening in the rear side of the housing, and the discharging faucet is arranged on the housing. An ice making column opening is formed in the cover cap, a sealing ring installation groove is formed in the outer side of the cover cap, the front side of the sealing ring installation groove is a front protruding edge, the rear side of the sealing ring installation groove is a cover edge, a sealing ring is arranged on the sealing ring installation groove, and a sealing lip is arranged on the outer side of the sealing ring. The sealing lip abuts against the wall of the opening in the rear side of the housing. The utility model has the beneficial effect of being convenient to clean and has the remarkable advantage of being convenient to clean. The detachable cover cap enables people to clean the interior of the cover shell more easily and thoroughly, dirt and sundries are removed, and the snow melting machine is kept clean and sanitary.

The invention provides a polar region photovoltaic module snow melting system, a snow melting control method and a polar region photovoltaic module, and belongs to the technical field of photovoltaic equipment. Comprising a snow melting unit arranged on the back surface of the photovoltaic panel, and the snow melting unit is suitable for melting accumulated snow on the photovoltaic panel through heating; the sensing unit is arranged on the photovoltaic panel and is suitable for acquiring a pressure value and a light transmission value of the front surface of the photovoltaic panel; and the signal processing unit is suitable for acquiring the pressure value and the light transmission value, and controlling the snow melting operation of the snow melting unit based on the pressure value and the light transmission value. Efficient and automatic snow melting of the photovoltaic module under the extreme weather condition can be realized, and the stability and continuity of power supply are ensured.

The utility model provides a locking structure for a snow melting machine and the snow melting machine, the locking structure comprises a lock catch assembly and a clamping assembly, the lock catch assembly is rotatably arranged on a motor base, the clamping assembly is fixed on a material barrel, and the material barrel is detachably connected with the motor base; and the lock catch assembly can be clamped with and separated from the clamping assembly. By arranging the locking structure, the material barrel is detachably fixed to the motor base, when the lock catch assembly is separated from the clamping assembly, the material barrel can be detached from the motor base, and the material barrel can be conveniently cleaned; when the lock catch assembly is clamped with the clamping assembly, the material barrel can be locked and fixed to the motor base, so that a cavity defined by the material barrel and the motor base is sealed, and the mounting convenience of the material barrel is improved.

The invention belongs to the technical field of preparation of snow-melting agents, and particularly relates to an environment-friendly slow-release snow-melting agent and a preparation method thereof. The environment-friendly slow-release snow-melting agent provided by the invention is prepared from the following raw materials in parts by weight: 60-80 parts of a basic snow-melting agent, 10-15 parts of a slow-release agent, 3-5 parts of a synergist, 2-4 parts of polyvinyl alcohol, 1-3 parts of an anti-corrosion additive, 1-3 parts of an anti-caking agent and 0.1-0.3 part of a color indicator. The environment-friendly slow-release snow-melting agent provided by the invention has the functions of efficiently melting snow, prolonging action time, enhancing dispersity and wettability, reducing metal corrosion, preventing caking and the like, meanwhile, the environment friendliness and biodegradability of the product are also improved, and the damage to infrastructures is remarkably reduced.

The invention discloses a photovoltaic structure snow load evaluation method based on a multi-layer snow melting model, and the method comprises the following steps: obtaining basic meteorological data of a target region, and starting simulation from the adding of new snowfall and the updating of snow top boundary conditions; calculating the total energy absorbed by the snow layer and the photovoltaic panel and the temperature of each layer; calculating accumulated positive energy of the accumulated snow and a critical value thereof, a mass balance equation of the accumulated snow and an accumulated snow compaction process; and calculating the design snow load of the photovoltaic structure of the target area. Constructing an energy balance equation of a snow layer and a photovoltaic panel and a mass balance equation of accumulated snow by using the basic meteorological data, and simulating the evolution process of the accumulated snow on the photovoltaic panel for many years by taking accumulated positive energy as a condition for judging the falling of the accumulated snow; according to the method, the annual extreme value of the snow load is extracted from the accumulated snow simulation result as a sample for statistical analysis, and then the photovoltaic snow load in the return period is calculated for guiding the photovoltaic structure design, so that the time cost and the economic cost for determining the snow load can be saved, the safety of a photovoltaic power station is improved, and the construction cost is reduced.

This invention discloses a heat pump outdoor unit, a heat pump system, and a control method for the heat pump outdoor unit, relating to the field of HVAC equipment technology. The heat pump outdoor unit includes: an outdoor unit casing, a heating component, and a heat exchange and exhaust component. The outdoor unit casing has an air inlet and an air outlet. The air outlet includes a first air outlet with a first air outlet grille. The outdoor unit casing includes an air outlet frame, and the first air outlet is formed on the top of the air outlet frame. The heating component includes a heating element disposed on the first air outlet grille. The heat exchange and exhaust component is disposed inside the outdoor unit casing. According to the embodiment of the heat pump outdoor unit of this invention, by providing a first air outlet grille at the first air outlet located at the top, the first air outlet grille can reduce the entry of external foreign objects into the outdoor unit casing through the first air outlet; and by providing a heating component on the first air outlet grille, ice and snow on the first air outlet grille can be melted, preventing ice and snow from clogging the first air outlet.