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205 results about "Frost" patented technology
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Frost is a thin layer of ice on a solid surface, which forms from water vapor in an above freezing atmosphere coming in contact with a solid surface whose temperature is below freezing, and resulting in a phase change from water vapor (a gas) to ice (a solid) as the water vapor reaches the freezing point. In temperate climates, it most commonly appears on surfaces near the ground as fragile white crystals; in cold climates, it occurs in a greater variety of forms. The propagation of crystal formation occurs by the process of nucleation.
Control method for air source heat pump unit
The invention relates to the technical field of air source heat pump unit control, and discloses a control method for an air source heat pump unit. The method comprises the following steps: acquiring environment temperature and humidity data in real time, and performing noise filtering and time synchronization; generating a temperature prediction sequence based on the sliding window and the LSTM model; fluctuation characteristics are extracted through an optimization algorithm, and compressor control signals are generated; estimating the thickness of a frost layer in combination with a thermodynamic model and dynamically generating a defrosting instruction; closed-loop control parameters are generated through normalization processing and weight distribution; and finally, a system execution command is generated through multi-objective optimization, and compressor regulation and control and system health monitoring are achieved. The unit operation efficiency can be improved, the energy consumption can be reduced, and the defrosting control accuracy and the system stability can be enhanced.
Owner:XINJIANG NUANLIDE NEW ENERGY TECH CO LTD
Wind-solar complementary air source heat pump integrated system
The invention relates to the technical field of air source heat pumps, and discloses a wind-solar complementary air source heat pump integrated system which comprises a hardware device, an active frost suppression module and a predictive optimization scheduling control system. The control system can collect internal and external state data of the system and quantitatively calculate frosting risk indexes of the evaporator in all time periods in the future based on future environment temperature and humidity predicted values. According to the method, the hardware device is connected with the active frost suppression module, a dynamic decision is made according to the frosting risk index, when it is judged that the future frosting risk exceeds a preset threshold value, the active frost suppression module is started in advance, photovoltaic heat recovery warm water stored in the hardware device is used for preheating air entering an evaporator, and frosting is actively suppressed from the source. By means of predictive active frost suppression, a traditional passive and high-energy-consumption defrosting mode is replaced, the operation efficiency and heating stability of the heat pump system in the wet and cold environment are remarkably improved, and comprehensive and efficient utilization of energy is achieved.
Owner:CHINA CONSTR EIGHT ENG DIV CORP LTD
Ultralow-temperature surface frosting testing device and testing method
Owner:LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
Intelligent defrosting control method, refrigeration system, controller and storage medium
The application discloses an intelligent defrosting control method, a refrigeration system, a controller and a storage medium, and relates to the technical field of defrosting control. The method comprises the following steps: acquiring first operation parameters and initial reference parameters of a refrigeration unit; performing thickness calculation processing on the first operation parameters and the initial reference parameters based on a frost layer calculation model to obtain a first frost layer thickness; determining a first defrosting control mode according to a first comparison result between the first frost layer thickness and a preset thickness threshold; the first defrosting control mode is one of the following: a thin-frost working condition control mode, a medium-frost working condition control mode and a thick-frost working condition control mode; determining a target defrosting device from the refrigeration unit according to the first defrosting control mode, and controlling the target defrosting device to perform dynamic defrosting control processing on a cold storage, so that intelligent defrosting is realized on the cold storage. The method can reduce the hardware cost, reliably and accurately realize defrosting operation, enhance the defrosting effect and reduce the system energy efficiency.
Owner:ZHUHAI SAMYOU ENVIRONMENTAL TECH CO LTD
Frost protected roadbed
Owner:HARBIN INST OF TECH
Integrated kiwi fruit atomizing system
The utility model relates to an integrated kiwi fruit atomizing system which comprises a first air inlet pipe and an arc-shaped exhaust pipe connected with the first air inlet pipe, a plurality of nozzles are arranged on the exhaust pipe, a greenhouse is further provided with a plurality of air bags, the air bags extend along the inner wall of the greenhouse, and an airflow channel is formed by the air bags and the inner wall of the greenhouse. The air bag is provided with an air inlet located at the ceiling and an air outlet located on the ground, and the air outlet is connected with an air suction pump through a circulating air pipe. When the device is used and freezing and frost prevention are needed in winter, warm air is conveyed into the greenhouse through the first air inlet pipe and the exhaust pipe, the warm air flows upwards and gathers at the top of the greenhouse after being sprayed out, and at the moment, the air suction pump is started to drive air in the air bag to flow, so that the warm air located at the top of the greenhouse flows downwards along the air bag, and when the warm air leaves the air bag, the warm air flows downwards. The warm air flows from bottom to top, so that the temperature in the greenhouse is increased under the condition that the warm air is not directly blown, and the anti-freezing and anti-frost effects are achieved.
Owner:SHANDONG INST OF POMOLOGY
High and low temperature all-in-one machine
PendingCN121764253AHeating or cooling apparatusTemperatue controlTemperature controlPlate heat exchanger
The invention relates to the technical field of temperature control equipment, in particular to a high and low temperature all-in-one machine which comprises an evaporator, the evaporator is a plate heat exchanger and is provided with a plurality of heat exchange plates arranged at equal intervals, and a first fluid channel for refrigerant circulation and a second fluid channel for secondary refrigerant circulation are arranged in the evaporator. The first fluid channel and the second fluid channel penetrate through the multiple heat exchange plates, an elastic piece is arranged between every two adjacent heat exchange plates, the upper end and the lower end of each elastic piece are fixedly connected with the corresponding heat exchange plate, and the middle of each elastic piece is in a movable state. The elastic pieces are arranged between the adjacent heat exchange plates in the evaporator, the middles of the elastic pieces are in the movable state, the elastic pieces swing and vibrate under the action of airflow, airflow distribution on the surfaces of the heat exchange plates is effectively changed, local low-temperature areas are damaged, and medium moisture or other components are prevented from being condensed into frost or ice; and meanwhile, the formed tiny frost layer or ice layer is crushed and falls off, and accumulation is delayed.
Owner:LUOSHI MACHINERY (CHENGDU) CO LTD
A freeze-drying apparatus
ActiveCN224316590UDrying solid materials without heatDrying machines with local agitationFrostFreeze-drying
The utility model relates to dry equipment technical field, and disclose a freeze drying equipment, including freeze drying equipment main part, both sides in freeze drying equipment main part inside are fixedly connected with a plurality of placing rack, and the top of placing rack is installed with material tray, and the bottom of one end of material tray is provided with the flow guide groove, and the inside sliding connection of material tray has the scraper, and both sides of scraper are provided with first round groove, and the inside fixed connection of first round groove has first spring, and one end fixed connection of first spring has the limit block material tray both sides are provided with round through slot. This freeze drying equipment can quickly remove the frost layer in the material tray, timely remove the frost layer, restore the material tray surface clean, ensure the heat transfer efficiency, shorten the freeze drying time, improve the production efficiency, at the same time, avoid the temperature inhomogeneous caused by frost layer too thick, ensure the consistency of material freeze drying quality.
Owner:XINJIANG FOSK REFRIGERATION TECH CO LTD
A multi-view redundancy and round-trip defrosting snow depth observation system and method
This invention discloses a snow depth observation system and method with multi-view redundancy and rotating defrosting, including a perception layer and an edge computing unit deployed in the field. The perception layer includes a multi-camera array, environmental sensors, and an intelligent heating bracket. The multi-camera array includes at least one wide-angle camera and at least two high-precision cameras with longer focal lengths, used for panoramic acquisition and sub-centimeter-level focused observation at different scale segments, respectively. The intelligent heating bracket has a built-in heating film to support zoned temperature control. The edge computing unit performs intelligent defrosting, image enhancement, AI recognition, and multi-source observation fusion calculation based on auxiliary source weighting according to the environment and image quality. This invention avoids single-point failures through multi-view hardware redundancy, utilizes intelligent rotating heating to balance low power consumption and anti-frost, and combines frequency domain defogging and a reliability weighting algorithm driven by auxiliary sources to solve the problems of observation interruption and misjudgment caused by frost, blurring, and occlusion in high-altitude and cold environments, achieving all-weather high-precision observation.
Owner:CHENGDU PLATEAU METEOROLOGICAL INST OF CHINA METEOROLOGICAL ADMINISTRATION
Anti-frosting and Anti-dew device for spectroscopic measurements
The present invention relates to a device for spectroscopic measurements, in particular X-ray diffraction (XRD), tem- perature-resolved second harmonic generation (TR-SHG) or infrared (IR) measurements, which prevents the formation of condensation (dew) or ice (frost) when carrying out spectroscopic measurements in sub-ambient temperature conditions and to a method of spectro- scopic measurements with said device.
Owner:UNIVERSITE DE ROUEN NORMANDIE
Apparatus for measuring water vapor in atmosphere
Embodiments of the present invention provide a frost point hygrometer apparatus utilizing dry ice and ethanol, or liquid nitrogen, as cryogenic coolant. FPH apparatus in accordance with embodiments of the present invention includes a copper cold finger with a sink immersed in a liquid cryogen to provide cooling power throughout the profile, a polished mirror disk residing at the opposite end of the cold finger with ambient air passing over it, a nichrome heater wrapped around the narrow shaft of the continuous cold finger and mirror piece to provide heat to the mirror, an optical source and detector, including an infrared light-emitting diode and a photodiode, to monitor the mirror's reflectivity as condensate accumulates in the form of dew or frost, a biconvex lens to focus the light reflected from the mirror into the photodiode, and a calibrated thermistor embedded in the mirror to measure the frost point temperature.
Owner:THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE COMMERCE
Assembly process, assembly platform and automated assembly method for pressure sensors
This invention discloses an assembly process, assembly platform, and automated assembly method for a pressure sensor, comprising: step a, freezing an elastic antifreeze plug in a low-temperature environment until it shrinks to a size smaller than the diameter of the drainage hole of the pressure sensor, changing its properties from elastic to brittle, and forming a frost layer on its surface; step b, with the drainage hole opening upwards; step c, inserting the antifreeze plug into the drainage hole to allow it to sink into the hole; step d, using a pressure rod to further penetrate the antifreeze plug; step e, checking whether the depth of the antifreeze plug in the drainage hole meets the standard; if not, repeating steps d and e until it does; step f, waiting for the antifreeze plug to thaw and restore its original size and elasticity, allowing the antifreeze plug to be elastically squeezed and fixed to the inner wall of the drainage hole. This invention, by freezing the antifreeze plug, reducing its size, making it brittle, and forming a frost layer on its surface to reduce friction, reduces the difficulty of inserting the antifreeze plug deep into the drainage hole while eliminating the need to apply lubricant to the surface of the antifreeze plug.
Owner:WUXI SENMIC SENSOR TECH CO LTD
Temperature control system and temperature control method
To suppress fluctuations in supply temperature due to defrost operation of a heat pump chiller. [Solution] The temperature adjustment system comprises a flow path through which a heat medium circulates, at least one heat pump chiller provided in the flow path, a heat source provided in the flow path, and a control device that controls the operation of the heat pump chiller and the heat source. The control device comprises an acquisition unit that acquires weather forecast data, a generation unit that uses the weather forecast data to generate an operation schedule for the heat pump chiller, predicts an implementation schedule for defrosting operation to remove frost from the heat pump chiller based on the generated operation schedule, and adds to the operation schedule a schedule for compensating operation of the heat source to suppress fluctuations in the supply temperature in the flow path due to defrosting operation based on the predicted implementation schedule, and a control unit that controls the operation of the heat pump chiller and the heat source based on the operation schedule.
Owner:TOKYO GAS CO LTD
Apparatus for defrosting a vehicle light
An apparatus for defrosting a vehicle light comprises a frame, a heating element connected to at least a portion of an internal facing surface of the frame, an attachment mechanism, and an electrical communication connection electrically connected between the heating element and a power source. The heating element may be configured to generate heat in the direction of the vehicle light, thereby melting snow, ice, or frost buildup on or in the vehicle light.
Owner:AAC ENTERPRISES LLC DBA ORACLE LIGHTING
Dynamic frost layer regulation-based test method and device for temperature and humidity of gas chamber of ring main unit
The present application relates to the technical field of power distribution equipment, and particularly relates to a ring main unit gas chamber temperature and humidity test method and device based on dynamic frost layer regulation. The method tests the ring main unit gas chamber at multiple temperature points in a high-low temperature test chamber, and dynamically regulates the thickness of the frost layer formed by a mirror surface humidity detection unit during dew point measurement to achieve rapid and accurate adjustment of the humidity in the gas chamber, thereby avoiding the traditional inefficient gas replacement process, allowing the entire humidity adjustment process to be completed within 10 minutes, greatly shortening the multi-working-condition temperature and humidity test cycle. The control terminal automatically coordinates the high-low temperature test chamber, electromagnetic valve, pump set and detection unit to achieve full closed-loop operation from temperature regulation, humidity measurement to frost layer regulation, supports 24-hour continuous operation, avoids operation errors and data fluctuations caused by manual intervention, and significantly improves the reliability and repeatability of test data.
Owner:ZHEJIANG HUADIAN EQUIP TESTING INST
Frost prevention and dust removal device based on plasma wind and heat exchange system
ActiveCN223869514UCorrosion preventionCompression machines with reversible cycleVirus inactivationFrost
The utility model discloses a frost prevention and dust removal device and heat exchange system based on plasma wind, including a plurality of plasma wind generation modules, the plurality of plasma wind generation modules are arranged in array, each plasma wind generation module includes an ionization unit and a high voltage conversion unit, the high voltage conversion unit is connected with a power supply, and the ionization unit is connected with the power supply. The high-voltage conversion unit is used for converting power supply voltage into high-voltage electricity needed by ionization, the ionization unit is connected with the high-voltage conversion unit, the high-voltage electricity generated by the high-voltage conversion unit is applied to the ionization unit to form a high-voltage electric field, gas molecules in air are ionized to form plasma wind, water molecule frosting can be restrained, a formed frost layer is decomposed, and the air quality is improved. Reverse circulation of the heat exchange system is not needed, the heating or refrigerating stability is improved, the service life of a compressor, a valve and other key components is prolonged, in addition, plasma air can further conduct dust removal, organic pollutant decomposition, sterilization and virus inactivation on the surface of the evaporator, the heat exchange efficiency can be improved, the operation and maintenance cost can be reduced, and the application range of the heat exchange system can be expanded.
Owner:GUANGDONG NEW ENERGY TECH DEV
METHOD FOR EJECTING A FLUSH HANDLE UNDER FROST CONDITIONS
Owner:AKWEL VIGO SPAIN SL
A protective structure for integrated acoustic, vibration, and temperature sensors in wind turbine generators
This utility model relates to the field of sensor protection technology, and in particular to a protective structure for an integrated acoustic, vibration, and temperature sensor for wind turbine generators. The structure includes an integrated sensor, a protective structure, a collection structure, and a cooling structure. The protective structure includes a flow guide shroud with grooves on its surface. The shroud is located directly above the integrated sensor and can directly block rain, snow, and hail from directly impacting it, thus providing protection. In winter, ice or snow may fall on the flow guide shroud, increasing the weight of the entire sensor assembly and affecting safety. At this time, an electric heating wire inside the storage box heats the water collected within. A micro-pump injects the heated water through a first water pipe into the interior of a first nozzle. The hot water then flows out from the first nozzle along the flow guide shroud, which helps to accelerate the melting of ice, frost, or snow. The melted water then flows out along the hollow plate and the liquid guide plate.
Owner:FUJIAN GUODIAN WIND POWER CO LTD FUQING BRANCH +1
Self-cleaning method of heat exchanger and air conditioner
The present application relates to a self-cleaning method of an air conditioner, in particular to a self-cleaning method of a heat exchanger and an air conditioner, comprising three stages; in the first stage, the dew point temperature is increased, so that the dew point temperature is higher than the freezing point; in the second stage, the indoor unit is started, so that the heat exchanger surface condensation and frost; in the third stage, the frost layer on the surface of the heat exchanger is melted, in the first stage, the indoor unit heat exchanger is in heating mode, and the fan is started, in the first stage, the humidification module is started, the indoor unit further comprises a humidity sensor module, and the control system dynamically adjusts the heating power and the humidification intensity according to the dew point temperature provided by the humidity sensor module, the dew point is greater than 0 DEG C when the refrigeration mode is started, and the fan of the indoor unit is opened; by increasing the temperature and humidity, the dew point temperature is increased, the condensation amount is increased, and the condensation time is prolonged, so that the condensed water can fully penetrate into the ash layer, the water amount during defrosting is increased, and the cleaning effect is improved.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
A distribution box with anti-freezing function
ActiveCN119401240BClimate change adaptationSubstation/switching arrangement cooling/ventilationSnowpackThermodynamics
The application discloses a distribution box with anti-freezing function, which comprises a box body and a box cover, the box body is internally provided with a heating mechanism, the box cover is provided with a mounting seat and an air outlet mechanism rotatably mounted in the mounting seat, and the air outlet mechanism can spray the high-temperature gas generated by the heating mechanism in a changeable form along the outer surface of the box cover. The distribution box has the advantages that: 1. the heating mechanism can firstly improve the surface temperature of the box cover to melt the bottom layer of snow on the surface of the box cover; 2. the air outlet mechanism can lead the high-temperature gas generated by the heating mechanism out of the box body and spray the high-temperature gas in a changeable form along the outer surface of the box cover, so that the snow on the box cover can be melted in a multi-dimensional manner, the melting process of the whole snow is accelerated, and a thick snow layer is avoided; and the application is dedicated to solving the problem of snow covering on the box cover of the distribution box, preventing the thick snow layer from causing frost in the distribution box and affecting the reliability and continuity of power supply, and preventing the box cover from being in a low-temperature and high-humidity environment for a long time and reducing the service life.
Owner:HENAN REAL ELECTRIC
Defrosting control method and device and refrigeration equipment
The invention provides a defrosting control method and device and refrigeration device.The defrosting control method comprises the steps that a first air pressure value is obtained, and the first air pressure value at least comprises the air pressure value of an air return opening when the height of a frost layer on the surface of an evaporator is smaller than the set height; a second air pressure value is obtained, and the second air pressure value is the real-time air pressure value of the air return opening; determining a wind pressure variation based on the first wind pressure value and the second wind pressure value; if the air pressure variable quantity is larger than or equal to a preset defrosting triggering threshold value, the defrosting heater is started to execute defrosting operation; and repeating the steps. According to the scheme, the frosting degree of the evaporator is deduced by monitoring the air pressure change at the air return port of the refrigerating chamber and reversely pushing the change of the air volume of the system, so that defrosting according to needs is achieved, and the purpose of reducing energy consumption is achieved.
Owner:CHANGHONG MEILING CO LTD
Heliostat night posture regulation and control system and method for inhibiting frosting
The invention relates to the technical field of solar photo-thermal power generation, in particular to a frosting-inhibiting heliostat night posture regulation and control system and method. The system comprises a power station meteorological station group used for collecting temperature, humidity, wind speed and wind direction meteorological data used for calculating the frosting amount in real time; the mirror surface parameter collector group is used for collecting temperature and emissivity data of the surface or frost layer of the heliostat in real time; the weather forecast database is used for outputting solar radiation intensity, temperature, wind speed and wind direction data for predicting the defrosting period of the second day; the data processor is used for collecting meteorological data and heliostat surface or frost layer temperature and emissivity data, and carrying out data analysis processing, comparison and discrimination; and the central control system is used for receiving data analysis processing, comparison and discrimination results of the data processor. Through real-time sensing of the multi-source environment parameters and the mirror surface parameters, the system can judge whether the heliostat is frosted or not, the frosting amount and the defrosting time are predicted, and then the night posture of the heliostat is regulated and controlled.
Owner:POWERCHINA RENEWABLE ENERGY CO LTD
Air conditioner capable of efficiently defrosting and defrosting control method thereof
According to the air conditioner capable of achieving efficient defrosting and the air conditioner defrosting control method, an outdoor heat exchanger is arranged and comprises a first refrigerant pipeline and a second refrigerant pipeline which are connected in parallel, and a throttling valve is arranged on the first refrigerant pipeline located on the upper portion; a first temperature detector and a second temperature detector are arranged outside a first refrigerant pipeline and a second refrigerant pipeline respectively, and when defrosting is executed, a first temperature value detected by the first temperature detector and a second temperature value detected by the second temperature detector are obtained; and the target opening degree of the throttling valve is adjusted based on the temperature difference value between the first temperature value and the second temperature value. The temperature difference value between the first temperature value and the second temperature value can reflect the difference between the frost layer degrees of the upper portion and the lower portion of the outdoor heat exchanger, so that the refrigerant flow of the upper portion and the lower portion of the outdoor heat exchanger can be matched with the defrosting process by adjusting defrosting refrigerant flow distribution, and the refrigerant utilization efficiency is improved. Therefore, defrosting efficiency of the outdoor heat exchanger is improved, and energy is saved.
Owner:HISENSE (GUANGDONG) AIR CONDITIONER
Intelligent frost detection control method and system for air source heat pump system
The invention belongs to the technical field of heating ventilation and air conditioning, and relates to an intelligent frost detection control method and system for an air source heat pump system, and the method comprises the steps: S1, collecting refrigerant pressure and temperature data at an inlet and an outlet of an evaporator, and collecting real-time operation condition parameters, environment parameters and meteorological prediction parameters in a future period; s2, preprocessing the collected data and constructing a multi-dimensional state feature vector; s3, obtaining a current frost layer grade index L1; s4, obtaining a frost layer grade trend index L2 in a future time period; s5, a comprehensive frost detection index Sdefault is obtained, and whether defrosting operation is carried out or not is judged based on the comprehensive frost detection index Sdefault; and S6, when defrosting operation needs to be conducted, a defrosting control strategy is dispatched from a preset defrosting strategy library based on the current frost layer grade index L1, the real-time operation working condition parameters and the environment parameters, and defrosting operation is conducted based on the dispatched defrosting control strategy. The annual energy efficiency and the operation reliability of the air source heat pump system under the wet and cold climate can be improved.
Owner:BEIJING NATIONAL BUILDING GREEN & LOW CARBON TECHNOLOGY INNOVATION CENTER CO LTD +1
Method and apparatus for defrosting, electronic device, storage medium
The application relates to the air conditioning technical field, and discloses a method for defrosting, which comprises the following steps: obtaining the frosting condition of a heat exchanger. In the case that the heat exchanger is frosting, the frost layer thickness on the heat exchanger is obtained. The heating temperature is determined according to the frost layer thickness. The heating device is controlled to heat the heat exchanger according to the heating temperature. In the case that the heat exchanger is frosting, the heating device arranged on the heat exchanger is controlled to heat the heat exchanger, so that the frost layer on the outer surface of the heat exchanger is directly heated. Since the refrigerant does not flow reversely during the defrosting process, the balance does not need to be re-established, so that the indoor temperature can be maintained stable. Meanwhile, the heating temperature of the heating device can be changed along with the change of the frost layer thickness by determining the heating temperature according to the frost layer thickness and controlling the heating device to heat the heat exchanger according to the heating temperature, so that the defrosting efficiency of the heat exchanger can be improved. The application further discloses a device for defrosting, an electronic equipment and a storage medium.
Owner:QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +3
Aircraft defroster cart air blowing pressure regulation method and system
ActiveCN120397283BFluid pressure control using electric meansItem transportation vehiclesAir velocityFrost
The application discloses a kind of aircraft defrosting vehicle blow gas pressure regulation method and system, belong to defrosting equipment regulation field, including obtaining the state data of aircraft defrosting area frost layer, generates defrosting effect evaluation index;According to defrosting effect evaluation index, whether the blow gas pressure of current aircraft defrosting vehicle is reasonable is judged;If the blow gas pressure of current aircraft defrosting vehicle is unreasonable, the environmental data and blow gas angle of aircraft defrosting area are obtained, blow gas pressure adjustment analysis model is established, blow gas pressure adjustment value is generated, and the blow gas pressure of defrosting vehicle is adjusted;The application generates multidimensional defrosting effect evaluation index by real-time monitoring frost layer thickness change speed and displacement speed, and constructs dynamic adjustment model in combination with environmental temperature, wind speed, blow gas angle, realizes the accurate regulation of blow gas pressure, not only can adapt to different environmental conditions, improve defrosting efficiency, reduce energy consumption, but also can reduce the risk of damage to aircraft surface when defrosting vehicle defrosting simultaneously.
Owner:DONGFANG AVIATION EQUIP MFG CORP SHANGHAI
A method for predicting and warning the frost damage risk of mountain orchard
The application provides a mountain orchard freeze damage risk prediction and warning method, comprising: obtaining historical weather data of a mountain orchard area in past days and forecast weather data in future days; determining input data based on the historical weather data and the forecast weather data, wherein the input data contains a historical weather feature vector and a forecast weather feature vector; inputting the input data into a preset freeze damage risk prediction model to obtain a freeze damage risk prediction result output by the freeze damage risk prediction model, and generating freeze damage risk prompt information based on the freeze damage risk prediction result. The application specifically designs a freeze damage risk prediction model, overcomes the disadvantages of traditional prediction models using historical data but lacking forecast data, can more accurately identify freeze damage risks, and gives timely reminders to prevent freeze damage of fruit trees.
Owner:EAST CHINA JIAOTONG UNIVERSITY
A control method for an intelligent wind turbine system
This invention discloses a control method for an intelligent fan system, relating to the field of fan control. The method includes: collecting multi-point temperatures of the outdoor heat exchanger coil and calculating subcooling to identify the initial frost period, frost development period, and full frost critical period; actively reducing fan speed and introducing solar water heating circulation when active frost protection conditions are met; calculating the natural temperature drop rate and expected temperature rise rate of the coil, and determining whether active frost protection conditions are met based on the average coil temperature; entering defrost mode when the frost protection time window is too short; using the difference between the solar collector outlet temperature and the average coil temperature as the effective driving temperature difference, calculating the expected temperature rise rate based on the coil heat capacity, and prioritizing the activation of the solar circulation pump to raise the coil temperature after determining that active frost protection conditions are met; and adjusting fan speed in stages according to the pre-frost temperature drop ratio; thus achieving the identification of the frost stage and coordinated control of fan speed, reducing indoor temperature fluctuations.
Owner:DEZHOU KERUITE FAN
Air conditioner control method, device, equipment, medium and product
The embodiment of the invention provides an air conditioner control method, device and equipment, a medium and a product, and is applied to the technical field of air conditioner control. The method comprises the steps that in a heating mode, the outdoor environment temperature and the outdoor relative humidity are obtained; determining a target frost area to which the outdoor environment belongs according to the outdoor environment temperature and the outdoor relative humidity; wherein different frosting areas correspond to different frosting difficulty levels; and when it is detected that the air conditioner meets the reverse rotation condition of the outer fan corresponding to the target frost area, the outer fan of the air conditioner is controlled to be switched from forward rotation to reverse rotation. According to the embodiment of the invention, whether the air conditioner meets the reverse rotation condition of the outer fan or not is determined according to the target frost region to which the outdoor environment belongs, so that the heat exchange efficiency between air and the heat exchanger is enhanced by utilizing the thin frost layer on the surface of the heat exchanger, the heating efficiency of the air conditioner is improved, and the duration of continuous heating is prolonged.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Telescope snow sweeping and defrosting device based on Antarctic extreme environment
The invention discloses a telescope snow sweeping and defrosting device based on the Antarctic extreme environment. The device is integrated on a telescope shell and located near window sealing glass. The device comprises a snow sweeping module, an electric heating defrosting module and a heat balance module, the snow sweeping module is used for removing accumulated snow on the outer surface of the window sealing glass, the electric heating defrosting module is used for removing frost on the outer surface of the window sealing glass, and the heat balance module is fixed to the upper portion of the window sealing glass. Dry cold air is blown out to the outer surface of the window sealing glass, so that the window sealing glass reaches a heat balance state. The device is compact in structure, high in adaptability and capable of effectively coping with extreme low temperature, strong wind and frost and snow accumulation environments of the south pole, automatic and efficient snow removal and defrosting at the glass sealing glass of the telescope are achieved, and the observation efficiency and continuous operation capacity of the telescope in the extreme environments such as the south pole are remarkably improved.
Owner:NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE