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482 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.
Air source heat pump heating method and system
The invention provides an air source heat pump heating method and system, and relates to the technical field of heat pump system thermal control, and the method comprises the steps: collecting evaporator surface frost layer thickness, environment temperature and humidity parameters in real time, inputting the parameters to a pre-trained neural network algorithm model, and identifying a frosting rate by analyzing a multi-factor nonlinear relation; predicting a future frosting development trend, and outputting frosting thickness increase prediction and severity degree results; and according to the frosting thickness increase prediction and the severity degree result, reverse circulation defrosting is started in advance when the frost layer does not reach the critical thickness, and optimal control over the defrosting process is achieved by adjusting the opening degree of the four-way valve and the rotating speed of the draught fan, so that the system state after defrosting is obtained. The energy efficiency of the system is improved, and the heating comfort is optimized.
Owner:LIAONING POWER INVESTMENT SMART ENERGY CO LTD
Intelligent warehouse logistics automatic transfer robot
The invention relates to the technical field of transfer robots, in particular to an intelligent warehouse logistics automatic transfer robot. The robot comprises a scraper and a suction cup which are arranged on a robot body, the scraper is provided with specially-designed groove pressing teeth, an arc-shaped groove with a guiding function can be formed in the surface of a box body, and it is ensured that a frost layer effectively falls off along a preset path through the design. The system collects temperature gradient, surface appearance and contact stress data in real time through the integrated multi-mode environment sensing unit, the intelligent decision-making unit establishes a dynamic control model based on the data, and accurate evaluation and self-adaptive processing of the frost layer state are achieved. The whole system constructs a complete closed-loop control chain, the limitation of a traditional defrosting method is overcome, the adsorption stability is kept, meanwhile, the operation efficiency is improved, the system is particularly suitable for the low-temperature storage environment of-25 DEG C and below, and a reliable solution is provided for cold-chain logistics automatic operation.
Owner:HUAZHONG UNIV OF SCI & TECH
Defrosting control device, defrosting control method and temperature regulation and control system
The invention discloses a defrosting control device, a defrosting control method and a temperature regulation and control system. The defrosting control device comprises an acquisition module, an edge calculation module, a defrosting module and a control module, the defrosting module comprises a plurality of defrosting units arranged on the heat exchange unit; the acquisition module is used for acquiring air pressure difference of the heat exchange unit and temperature field distribution information of a set surface of the heat exchange unit; the edge calculation module is used for determining a critical defrosting threshold value and frost layer thickness distribution information of a set surface according to the wind pressure difference and the temperature field distribution information; the control module is used for determining a target defrosting area according to the frost layer thickness distribution information and the critical defrosting threshold value and controlling the defrosting unit corresponding to the target defrosting area to conduct defrosting. The invention provides a defrosting control device, a defrosting control method and a temperature regulation and control system, which can reduce the defrosting energy consumption, ensure the continuous work of the temperature regulation and control system where a heat exchange unit is located during defrosting, prolong the service life of the temperature regulation and control system and increase the application scene of the temperature regulation and control system.
Owner:GUANGDONG NEW ENERGY TECH DEV
Intelligent control method and control system for small refrigeration equipment
The invention belongs to the technical field of refrigeration, and discloses an intelligent control method and system for small refrigeration equipment. On one hand, working condition parameters and operation parameters are monitored through various sensors, and a multi-dimensional database is established; establishing an agent model of the refrigeration equipment based on the multi-dimensional database, and performing intelligent matching control on the operation of a compressor and a fan in combination with real-time monitoring data; and on the other hand, a bid evaluation index of the period COPcyc is established to comprehensively measure energy loss in the refrigeration period and the defrosting period, the indicated defrosting amount is determined, and defrosting is started when the accumulated frosting amount reaches the indicated defrosting amount. On the basis that the refrigeration requirement of the refrigeration space is met, the temperature control precision in the refrigeration space is improved by optimizing part operation, inhibiting frost layer growth and starting defrosting according to needs, the operation energy consumption of the refrigeration equipment is reduced, and a new thought and method are provided for precise temperature control and energy conservation of the refrigeration equipment.
Owner:TIANJIN UNIV
Surface stratum disturbance temperature inversion anti-frost method
PendingCN120296425AWeather condition predictionIndication of weather conditions using multiple variablesFrostMonitoring system
The invention relates to the technical field of orchard meteorological disaster prevention and reduction frost prevention, and provides a surface layer disturbance temperature inversion frost prevention method. According to the method, the frost rate of the orchard can be effectively reduced and the frost loss can be reduced through the processes of constructing the orchard air temperature prediction model, determining the frost disaster threshold value, installing fan pipe tower equipment in the orchard, collecting temperature data in real time based on a sensor network of an Internet of Things monitoring system and optimizing fan parameters through the heat balance model.
Owner:SHANXI INST OF METEOROLOGICAL SCI +1
Defrosting control method and system for refrigerating unit
The invention discloses a defrosting control method and system for a refrigerating unit, and relates to the related field of defrosting control technology.The method comprises the steps that multiple intelligent sensors are installed at key parts of the refrigerating unit, temperature, humidity and air volume data are collected in real time, and a camera is installed to shoot the actual situation of a frost layer; the collected data are preprocessed, and multi-modal data of the refrigerating unit are obtained; the deep learning model is applied to analyze multi-modal data of the refrigerating unit, and defrosting requirements and areas are predicted; according to the model prediction result, the defrosting mode and the dripping duration of the refrigerating unit are dynamically adjusted; and the real-time defrosting condition of the refrigerating unit and the environment data change trend are monitored, and model training data and related parameters are updated. The technical problems that according to an existing defrosting control method, the defrosting time cannot be dynamically adjusted according to the actual frost layer condition, the defrosting control precision is insufficient, and the efficiency is low are solved, and the technical effects that the defrosting control intelligent level is improved, and the defrosting control precision and efficiency are improved are achieved.
Owner:江苏利邦机电设备有限公司
Defrosting control method and device, air conditioner and computer readable storage medium
ActiveCN119146531AImprove heating effectMechanical apparatusLighting and heating apparatusFrostProcess engineering
The embodiment of the invention provides a defrosting control method and device, an air conditioner and a computer readable storage medium. The defrosting control method comprises the steps that the frosting degree of an outdoor heat exchanger is determined; in response to determining that the outdoor heat exchanger is in the thin frost state, the air conditioner is controlled to enter a thin frost non-reversing defrosting mode; in response to determining that the outdoor heat exchanger is in the medium frost state, the air conditioner is controlled to enter a medium frost non-reversing defrosting mode; and in response to determining that the outdoor heat exchanger is in the heavy frost state, the air conditioner is controlled to enter a reverse circulation defrosting mode.
Owner:TCL AIR CONDITIONER ZHONGSHAN CO LTD
Defrosting method and device of air conditioner, computer program product and air conditioning system
The invention provides a defrosting method and device of an air conditioner, a computer program product and an air conditioning system.The air conditioner comprises an outdoor unit, the outdoor unit comprises an outdoor heat exchanger and a plurality of heaters located on the outdoor heat exchanger, and the method comprises the steps that obtaining is conducted, specifically, the thicknesses of a plurality of frost layers are obtained in real time, the thicknesses of the frost layers are the thicknesses of the frost layers on the corresponding areas of the outdoor heat exchanger; in the first control step, under the condition that the thicknesses of all the frost layers are larger than or equal to a first threshold value, the air conditioner is controlled to enter a defrosting mode, and the defrosting mode is a mode that the air conditioner enters a refrigeration state and a fan does not work; and a second control step, under the condition that the thickness of part of the frost layer is larger than or equal to the first threshold value, the target heater is controlled to conduct defrosting, the target heater is a heater on the area corresponding to the thickness of the frost layer larger than or equal to the first threshold value, and the problem that in the prior art, the user experience is affected due to the fact that a defrosting mode is frequently entered is solved.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Low-temperature cold trap water removal device
The invention discloses a low-temperature cold trap water removal device which comprises more than two water removal channels which are connected in parallel; each water removal channel comprises a refrigeration water removal gas path and an ice melting purging gas path which are connected in series; each refrigeration and water removal gas path is also connected with an inlet of a dry gas collection gas path, and an outlet of the dry gas collection gas path is used for being connected with an analyzer; and each water removal channel is connected with a controller, and the controller is used for controlling the refrigeration water removal gas paths and the ice melting purging gas paths of the different water removal channels to operate in a staggered mode. According to the application, moisture in the gas to be dewatered can be effectively removed, frost can be timely removed, and related phenomena such as relatively large dead volume of the cold trap can be avoided.
Owner:四川省成都生态环境监测中心站
Phase change-moisture absorption and drainage composite roadbed structure in seasonal frozen region and intelligent regulation and control method
The invention provides a phase change-moisture absorption and drainage composite roadbed structure in a seasonal frozen region and an intelligent regulation and control method, and relates to the technical field of roadbed design and renovation. The roadbed structure is characterized in that a plurality of gradient phase change material layers are arranged on the top surface of a roadbed surface layer; the multi-layer gradient phase change material layer, the high moisture absorption and drainage geotextile layer and the drainage pipe system are arranged from top to bottom; the phase change temperature intervals and the phase change latent heat of the phase change layers in the multiple gradient phase change material layers are different; the high moisture absorption and drainage geotextile layer is used for guiding water in the soil body into the drainage pipe system; the drainage pipe system is of a porous structure with the inclination angle within the set angle range and is used for guiding water in the soil into the drainage ditch. And the intelligent regulation and control system is used for dynamically regulating the thermal resistance of each phase change layer and the opening degree of the drainage pipe. According to the invention, the time of the roadbed in a relatively stable physical state can be prolonged, so that the purpose of preventing and treating winter frost heaving, frost boiling and mud rising in a spring melting period and other diseases caused by temperature change of the roadbed in severe cold areas is achieved.
Owner:SHIJIAZHUANG TIEDAO UNIV
SF6 gas electrification tendency determination method
ActiveCN119619752ARealize the determination of live tendencyShorten the time for measuring charging tendencyTesting dielectric strengthFrostGas chamber
The invention discloses a method for measuring the electrification tendency of SF6 gas. The method comprises the following steps: measuring the humidity D1 of the SF6 gas in a gas chamber; and establishing a frost layer by adopting uncharged SF6 gas with the humidity of D2. The SF6 gas in the gas chamber and the uncharged SF6 gas with the humidity of D2 are mixed according to a set proportion to obtain first mixed gas, the first mixed gas is led to the frost layer, and the time T required by the first mixed gas for changing the thickness of the frost layer is measured. Leading a second mixed gas obtained by mixing the uncharged SF6 gas with the humidity of D1 and the uncharged SF6 gas with the humidity of D2 according to a set proportion to the frost layer, and measuring the time T1 required by the second mixed gas to change the thickness of the frost layer. And judging whether the SF6 gas in the gas chamber has an electrification tendency or not according to the T and the T1. According to the invention, based on the principle that SF6 <-> and H2O are combined after partial discharge, SF6 gas with certain humidity is taken as reference gas, and by measuring the elimination time for reducing a cold mirror frost layer of the reference gas to a specific thickness, the electrification tendency of the SF6 gas in the gas chamber can be measured.
Owner:POWER RES INST OF STATE GRID SHAANXI ELECTRIC POWER CO LTD +1
Intelligent defrosting method and system of energy-saving variable-frequency refrigeration fresh-keeping equipment
The invention provides an intelligent defrosting method and system for energy-saving variable-frequency refrigeration and fresh-keeping equipment, relates to the technical field of refrigeration and fresh-keeping equipment, and realizes accurate and efficient defrosting operation by integrating an acquisition module, a calculation module, a judgment module, a control module, a hot fluorine defrosting module, an ultrasonic cavitation jet module and an AI visual detection module. Indoor return air temperature and evaporator outlet surface temperature can be collected in real time, the frosting temperature difference is calculated, whether defrosting is needed or not is judged according to the temperature difference, a self-adaptive defrosting control strategy is adopted, the optimal defrosting time and area are selected, energy consumption is reduced, a hot fluorine defrosting technology is combined with frequency conversion control, and heat productivity and warehouse temperature fluctuation are reduced. According to the ultrasonic cavitation jet technology, frost falling is accelerated through sound pressure, the water-saving and environment-friendly defrosting effect is achieved, the AI visual detection module integrates multiple technologies to accurately measure a frost layer, decision support is provided for the control module, and the system improves the defrosting efficiency and reduces energy consumption.
Owner:SICHUAN ENTERPRISE SERVICE CLOUD ENTERPRISE MANAGEMENT GRP CO LTD
Heat storage and defrosting control method for heat pump
The invention discloses a heat pump heat storage defrosting control method which comprises the following steps: outdoor temperature acquisition: after starting to heat, performing data acquisition on the surface temperature of an outdoor heat exchanger at regular time; temperature deviation is calculated, specifically, temperature data sampled each time are set to be Tn, the temperature difference Tn = Tn-T0 during sampling each time is calculated, and the sampling frequency is t / time; calculating a temperature change rate: calculating a real-time temperature change rate according to the acquisition evaluation rate; frosting degree judgment, wherein the frosting degree is divided into mild frosting, moderate frosting or severe frosting according to the temperature difference and the temperature change rate; and according to the frosting degree, different strategies are adopted to adjust the opening degree of the main electronic expansion valve and the auxiliary electronic expansion valve, and a refrigerant is called to enter the outdoor heat exchanger for defrosting. The frosting degree is subdivided, and the opening degree of the main electronic expansion valve and the opening degree of the auxiliary electronic expansion valve are adjusted through different strategies, so that the situation that the indoor temperature is greatly reduced during mild frosting or moderate frosting is avoided.
Owner:GUANGDONG ENBOLI ELECTRIC CO LTD +1
Defrosting method, device and equipment for outdoor heat exchanger of air conditioner and medium
The invention discloses a defrosting method, device and equipment for an outdoor heat exchanger of an air conditioner and a medium. According to the defrosting method for the outdoor heat exchanger of the air conditioner, the thickness of a frost layer is monitored in real time, when the thickness of the frost layer reaches a first preset threshold value, the defrosting control process is started, and the frosting rate is calculated. And according to the preset rate interval where the frosting rate is located, hot gas defrosting and reversing defrosting are dynamically selected. And when the thickness of the frost layer is reduced to a second preset threshold value, the defrosting process is ended. According to the method, a dynamic adjustment defrosting strategy is used, hot gas defrosting or reversing defrosting is flexibly selected according to the change of the frosting rate, operation of a long-time low-efficiency defrosting mode is avoided, and therefore energy waste generated when the air conditioner outdoor heat exchanger executes defrosting and defrosting is reduced.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Method for simulating performance of LNG ambient air vaporizer under frosting condition
The present disclosure discloses a method for simulating performance and optimizing design of an LNG ambient air vaporizer under a frosting condition, performing site operation test on the LNG ambient air vaporizer to obtain fitting relationship between the outer wall temperature of frosted finned tube and frost layer; transforming a sum of increased frost layer thermal resistance and thermal resistance into equivalent thermal contact resistance, and representing the equivalent thermal contact resistance as a function of the outer wall temperature; establishing a calculation model of the LNG ambient air vaporizer, performing simulation calculation by equivalent heat conduction coefficient, so as to obtain fluid-solid conjugate heat transfer characteristics and vaporization performance of the LNG ambient air vaporizer under the frosting condition for optimization design of the LNG ambient air vaporizer.
Owner:NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
Intelligent control method and system for latent heat defrosting
The invention discloses an intelligent control method and system for latent heat defrosting, and particularly relates to the technical field of latent heat defrosting control. The method comprises the following steps that the defrosting starting time is accurately judged by establishing a multi-parameter environment sensing model, and carbon dioxide or Freon or air is selected as a heating medium; latent heat is input into the heat exchange area through the independent heating circulation path; the gravity direction of the heat exchange pipe is dynamically judged according to the platform posture, and the pipe section in the natural frost stripping direction is preferentially heated; an intermittent heating strategy based on thermal modeling is adopted to control energy consumption; when the energy is insufficient, heating is suspended, the state is recorded, and the energy is recovered for subsequent defrosting; according to the method, accurate judgment of defrosting starting, directional and efficient heating control and whole-process closed-loop management are achieved, the energy utilization efficiency, the frost layer stripping effect and the control reliability are remarkably improved, intelligence, self-adaption and restorability are achieved, and the method is suitable for meeting the requirement for stable defrosting in energy-limited and complex-environment scenes such as a high-altitude platform.
Owner:ZHEJIANG YINGNUO GREEN ENERGY TECH CO LTD
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
Intelligent visual monitoring method and system in extremely cold environment
The invention relates to the technical field of image monitoring, in particular to an intelligent visual monitoring method and system in an extremely cold environment, and the method comprises the following steps: based on an extremely cold monitoring environment, collecting environment temperature data through a temperature sensor, measuring the wind speed and the snowfall density, and obtaining low-temperature environment state data; according to the invention, environment state data is acquired in real time, a battery charging and discharging strategy is automatically adjusted to adapt to low-temperature influence, a heating element is automatically adjusted to prevent the equipment from frosting and freezing, normal operation of functions of the monitoring equipment is ensured, and light sensitivity and exposure parameters of an image sensor are adjusted, so that the monitoring efficiency is improved. The image quality is improved, the influence of an extremely cold environment on the image quality is eliminated, the monitored data is more accurate and reliable in vision, the compression ratio is dynamically adjusted, key image data is preferentially transmitted, and the efficiency and the real-time performance of data transmission are enhanced.
Owner:XIAN CHUANGYI INFORMATION 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
Air conditioner, control method of air conditioner and computer program product
The invention relates to an air conditioner, a control method of the air conditioner and a computer program product, and the control method comprises the steps that the first weight of an outdoor unit of the air conditioner is obtained in response to the air conditioner entering a defrosting mode; when the defrosting mode runs for the first preset duration, the second weight of the outdoor unit is obtained; and according to the first weight and the second weight, the on-off state of a heating device of a water pan of the outdoor unit is controlled. According to the control method, the frost accumulation condition in the water pan can be judged through the first weight and the second weight, and then whether the heating device is started or not can be controlled according to the frost accumulation condition. The heating device can be prevented from being started under the condition that no frost exists in the water pan, electric energy waste is reduced, air conditioner energy consumption is reduced, and the purposes of energy conservation and emission reduction are achieved.
Owner:QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +2
Protective structure for defrosting of air source heat pump
The utility model relates to the field of air source heat pumps, in particular to a protective structure for defrosting of an air source heat pump. The protection structure aims at solving the technical problems that in the prior art, no protection structure is arranged on the outer side of an air source heat pump, and covered snow and frost cannot be cleaned and removed. A protective structure for defrosting of an air source heat pump comprises an air source heat pump protective box and an air inlet. A full-wrapping type air source heat pump protection box is installed on the outer side of the air source heat pump, and meanwhile protection blocking nets are arranged on the inner side of an air inlet and the inner side of an air outlet, so that the air source heat pump is protected in an all-around mode; the first defrosting assembly and the second defrosting assembly are driven by the moving assembly to do reciprocating translational motion, the first defrosting assembly can sweep accumulated snow at the top end and remove frost, the second defrosting assembly knocks down the frost and sundries attached to the outer side of the air source heat pump protection box, and the outer side of the air source heat pump protection box is prevented from being covered for a long time.
Owner:LAILEY & COATES INT LTD
Cold region tunnel portal air curtain heat preservation system utilizing geothermal energy
The invention provides a cold region tunnel portal air curtain heat preservation system utilizing geothermal energy, comprising: a geothermal energy heat extraction device, the geothermal energy heat extraction device comprises a heat extraction drill hole arranged in the middle section surrounding rock of a tunnel and a heat extraction pipe arranged in the heat extraction drill hole, and the heat extraction pipe is internally provided with a heat extraction medium; the arc-shaped air curtain unit is provided with air curtain machines which are uniformly arranged in the circumferential direction of the inner side of the tunnel portal lining; the ground source heat pump is used for providing heat energy for the air heating cavity by taking geothermal energy as a heat source; clean and green geothermal energy and the air curtain technology are combined to achieve long-term prevention of cold damage to the tunnel portal in the cold region, the geothermal energy is transferred to the tunnel portal, a hot air curtain wall is formed at the portal through the air curtain technology, cold energy outside the tunnel is prevented from being transferred into the tunnel, and safety and no influence on driving installation are 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
Frost detection and defrost control
A system to detect frost in an evaporator coil is provided. The system includes a controller and a probe. The probe includes one or more electrodes. The probe is attached to a component of an evaporator coil. The probe is configured to transmit detection of environmental condition(s) in proximity to the component of the evaporator coil to the controller. The controller initiates and terminates a defrost operation based on the environmental condition(s) reported by the probe.
Owner:THERMO KING CORP
Air source heat pump system and defrosting control method thereof
An air source heat pump system is sequentially connected through refrigerant pipelines to form a closed cycle, used for achieving the refrigerating or heating function, configured to detect the outdoor environment temperature in real time and output environment temperature signals, arranged on the surface of an evaporator and configured to detect the surface temperature of the evaporator in real time and output surface temperature signals. The controller is configured to detect the relative humidity of outdoor air and output a humidity signal, the controller is electrically connected with the environment temperature sensor, the evaporator temperature sensor and the humidity sensor, the controller comprises a memory and a processor, the memory stores a dynamic defrosting control program, and the processor is used for processing the dynamic defrosting control program. The processor executes the program to dynamically calculate the frost layer generation rate according to the environment temperature, the evaporator surface temperature and the relative humidity and adaptively adjust defrosting control parameters based on the frost layer generation rate. The system supports the three modes of electric heating defrosting, hot air defrosting and combined defrosting, and the optimal mode is intelligently selected according to the environmental conditions.
Owner:HENAN HAOLI INTELLIGENT TECH CO LTD
Humidifying and cooling system
This humidifying and cooling system for a cold storage room comprises a cooling device having a cooling coil, and a control device for controlling the cooling device, wherein the control device controls the cooling device to repeatedly execute: a cooling mode for cooling the cold storage room while allowing frost or water droplets to adhere to the cooling coil; and a humidifying mode for humidifying the cold storage room while causing the frost adhering to the cooling coil to sublimate or causing the water droplets adhering to the cooling coil to evaporate.
Owner:ZERO FOOD CO LTD
Self-adaptive defrosting control method of heat pump system and heat pump system
The invention relates to a self-adaptive defrosting control method of a heat pump system and the heat pump system.The minimum defrosting interval time is determined by monitoring the outer side temperature TPG of an evaporator coil, the outer side relative humidity RHPG of the coil, the environment temperature TH and the environment relative humidity RH, and the minimum defrosting interval time is corrected by monitoring the rain and snow conditions of the place where the heat pump system is located; and defrosting control is carried out by adopting the corrected minimum defrosting interval time, and the optimal regular defrosting time can be adaptively set for the heat pump system according to the environment and the weather condition of the place where the heat pump system is located. The self-adaptively generated regular defrosting time is the corrected minimum defrosting interval time, so that the negative influence of a frost layer on the heat transfer performance of the evaporator can be effectively reduced, and stable operation of equipment is kept; electric energy consumption can be reduced and energy utilization rate can be increased; mechanical loss can be avoided, and the overall service life of the heat pump system is prolonged.
Owner:ZHONGSHAN AMITIME ELECTRIC CO LTD +1
Method and device for identifying frost layer of air conditioner and air conditioner
The invention relates to the technical field of intelligent household appliances, and discloses a method and device for identifying a frost layer of an air conditioner and the air conditioner. The method comprises the steps that samples in an initial sample set are divided into a first frost layer type and a second frost layer type according to original frost layer labels; determining a similarity score between each sample in the initial sample set and the second frost layer type; wherein the frosting thickness of the second frost layer type is larger than that of the first frost layer type; updating the original frost layer labels of the samples in the initial sample set according to the similarity score to form a new sample set; and inputting the new sample set into a neural network for training to obtain a frost layer type identification model. The frost layer recognition model can output the probability that the frost layer belongs to thick frost, then whether the defrosting degree is reached or not is recognized, and the state of the frost layer is judged more accurately.
Owner:QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
A heat pump air conditioner defrosting control method, device and equipment
The present application provides a control method, device and equipment for defrosting a heat pump air conditioner. In the method, the ambient temperature, the frosting time of the evaporator, the air humidity, the evaporation temperature, the fin temperature of the evaporator, and the suction pressure of the compressor are obtained; the temperature difference between the two ends of the evaporator is determined according to the ambient temperature and the fin temperature; the thickness of the frost layer is calculated according to the temperature difference between the two ends of the evaporator, the frosting time and the air humidity; based on the thickness of the frost layer, the ambient temperature, the fin temperature, the evaporation temperature and the suction pressure of the compressor, it is judged whether the defrosting entry conditions are met; if the defrosting entry conditions are met, the heat pump air conditioner is controlled to enter the defrosting operation, and the defrosting time of the defrosting operation is obtained; when the frost layer thickness and / or the defrosting time reach the defrosting exit conditions, the defrosting operation is exited. The above method can more accurately determine the timing of the defrosting operation by determining the thickness of the frost layer, and combining the frost layer thickness and more data, effectively avoiding the situation of mistaken defrosting.
Owner:NEW UNITED GROUP
Multi-stage composite circulating cooling unit suitable for inactive secondary refrigerant and refrigerating system
The invention belongs to the technical field of circulating refrigeration equipment, and discloses a multi-stage composite circulating cooling unit suitable for an inactive secondary refrigerant and a refrigerating system. The unit comprises a high-temperature-stage evaporator and a low-temperature-stage evaporator, a high-temperature-stage gas-liquid separation part is arranged on the high-temperature-stage hot fluid side, the evaporation temperature of the high-temperature-stage hot fluid side can be between the freezing point temperature and the dew point temperature, and the evaporation temperature of the low-temperature-stage hot fluid side is smaller than that of the high-temperature-stage hot fluid side. And the non-active secondary refrigerant can be cooled to the set temperature step by step. By means of the arrangement, the high-temperature-stage evaporator can be continuously dewed but not frosted, it is guaranteed that dehumidification work is continuously carried out, a large proportion of moisture in the inactive secondary refrigerant is removed, favorable conditions are created for work of the low-temperature-stage evaporator, the defrosting interval time of the low-temperature-stage evaporator is prolonged, and the defrosting efficiency of the low-temperature-stage evaporator is improved. The phenomenon that the circulating air duct is frequently blocked is improved, the high circulating air volume and the high refrigerating effect are guaranteed, and then the product yield and the economic benefits are directly improved.
Owner:SUZHOU AODE MACHINERY