173 results about "Frost (temperature)" patented technology

The invention provides an intelligent adjusting and dynamic defrosting method and system based on multiple sensors and a medium The method comprises the steps that firstly, monitoring data are obtained in real time according to the multi-dimensional sensors deployed in a freezer, and a multi-source data matrix is obtained through preset data processing and integration; secondly, dynamically adjusting a frost condition model weight coefficient according to monitoring data, and quantifying a frost condition coefficient based on a frost condition model in combination with a multi-source data matrix; then, executing a three-stage defrosting strategy according to the frost condition coefficient, and respectively adjusting working parameters of defrosting equipment such as a compressor, a condensation fan or a heater; and finally, precise control over the box temperature is achieved through power step soft start of a compressor and PID dynamic adjustment of an electronic expansion valve, and energy efficiency optimization is achieved by automatically optimizing the rotating speed of a condensation fan based on the environment temperature and humidity. The corresponding defrosting operation is triggered through the frost condition coefficient, and the effectiveness of defrosting and the stability of the box temperature are improved; in addition, the adaptability of special scenes is enhanced by dynamically adjusting the weight.

The invention discloses an existing wind power blade electrothermal film deicing control method based on big data, and relates to the technical field of wind turbine generator operation control and ice prevention and removal. Frost ice / glaze ice probability output by an ice type discrimination model does not only give an alarm any more, but is directly converted into an increase / decrease coefficient constrained by boundary and monotonicity; energy can be fully put in a glaze ice scene, and overheating and over-consumption can be avoided in a frost ice scene; according to the method, the change trend of wind speed, temperature and relative humidity is introduced as modulation factors, the working condition of forming / turning glaze ice is responded in advance, and insufficient deicing caused by static threshold hysteresis is reduced; according to power deviation correction, a unit wind speed-power curve serves as a reference, a dead zone, segmented gain and accumulative saturation structure is adopted, on the premise of not depending on an external icing sensor, extrinsic performance of pneumatic degradation is closed into controlled quantity, sensitivity and stability are considered, and start-stop oscillation and duration drift are reduced.

The invention provides an air source heat pump unit with an intelligent defrosting function, and belongs to the technical field of heat pump units. Comprising a unit box, the two ends of the inner side of the unit box are fixedly connected with fixing plates, the tops of the two fixing plates are fixedly connected with the same evaporator, the bottom of the evaporator fixedly communicates with a discharge pipe, and the bottoms of the two fixing plates are fixedly connected with the same fixing seat. By arranging the temperature sensor, the flow dividing valve, the air pipe, the defrosting spray head and the flow blocking cover, when the temperature sensor detects that the temperature of the outer side of the evaporator is lower than a certain degree, part of hot steam output downwards from the interior of the connecting pipe is divided through the flow dividing valve, and then the hot steam is sprayed out of the evaporator through the air pipe and the defrosting spray head; and hot steam is guided through the flow blocking cover to flow on the outer side of the evaporator, a frost layer condensed on the outer side of the evaporator is automatically eliminated, the intelligent defrosting effect of the device is achieved, and the practicability of the device is improved.

The invention provides a frost test system, method and equipment, and relates to the field of test equipment, the system comprises a damp-heat test box, the damp-heat test box is provided with a first working cavity, and the damp-heat test box is used for controlling the temperature and humidity in the first working cavity; the temperature test box is arranged in the first working cavity, is provided with a second working cavity, and is used for controlling the temperature in the second working cavity; the temperature test box further comprises a box door, and the box door is used for communicating or separating the first working cavity and the second working cavity. One end of the connecting sleeve is communicated with the second working cavity, and the other end of the connecting sleeve is communicated with the external environment, so that the test control equipment can be connected with the to-be-tested device in the second working cavity through a connecting wire penetrating through the connecting sleeve; according to the system provided by the invention, the temperature test box is nested in the damp heat test box, rapid switching of different test environments is realized through opening and closing of the box door, a sample does not need to be manually moved, and the test efficiency is improved.

The present invention discloses a high-efficiency spiral food quick-freezing machine, which includes a processing chamber, a condensation component arranged in the processing chamber, and two spiral conveyors used in cooperation. An evaporator is sleeved on the outer circumferences of the two spiral conveyors. The present invention relates to the technical field of quick-freezing processing. The high-efficiency spiral food quick-freezing machine and its use method, through the cooperation of a reciprocating driving component and a defrosting component, wipe the surface of the spiral heat exchange tube reciprocally to remove frost. During the defrosting process, the defrosting component is arranged in a stepped manner to ensure that the frost wiped from the spiral heat exchange tube can smoothly fall into the bottom of the inner cavity of the heat exchange cavity, so as to achieve the effect of effectively separating the fallen frost from the spiral heat exchange tube. And under the cooperation of a blocking component and a fallen frost cleaning component, the fallen frost at the bottom of the inner cavity of the heat exchange cavity is accumulated and cleaned into an isolation cavity. Through the blocking of the frost passing port by the blocking component, the influence of the accumulated fallen frost on the temperature of the heat exchange tube is further avoided.

The invention discloses a loading lap joint device for cold chain transportation and sorting and a using method thereof, and relates to the technical field of cold chain transportation, the loading lap joint device comprises a drawing cold storage module, a cold storage module, a cold storage module, a cold storage module, a cold storage module, a cold storage module and a cold storage module, the drawing cold storage module is slidably mounted on a sliding groove in the bottom of a cold chain vehicle compartment, and a cold storage cavity is formed in the drawing cold storage module; the linkage defrosting mechanism comprises a frame type defrosting scraping plate arranged above the drawing cold storage module, a frost collecting groove is formed in the side edge of the cold storage cavity, and scraped frost water is guided into the frost collecting groove through the defrosting scraping plate; the lap joint interface module is arranged at the front end of the drawing cold storage module and comprises a conveying plate and a temperature adjusting air curtain which are movably hinged, and the temperature adjusting air curtain communicates with the cold storage cavity and the frost collecting groove through an air duct and releases cold air; the control unit is used for monitoring the temperature in the compartment and the platform position and adjusting the air speed of the air curtain to control the cold air circulation amount. The system not only can automatically remove the frost layer in the carriage and effectively reduce the environment temperature during loading, but also can be flexibly butted with a sorting line, so that energy conservation, high efficiency and temperature control guarantee of a cold chain loading link are realized.

The invention relates to the technical field of heat pump control, and discloses a defrosting method and device of a heat pump system and the heat pump system.The defrosting method comprises the steps that the temperature and humidity of gaps of a fin type heat exchanger are monitored in real time; and when the temperature is lower than or equal to the threshold value of the dynamic dew point temperature plus the safety margin and the humidity is higher than or equal to the threshold value, it is judged that the frosting prevention condition is met, the gap temperature is increased by adjusting the refrigerant bypass valve, the gap humidity is reduced by adjusting the airflow adjusting valve, and therefore frosting is actively prevented. And if the frost layer appears, short-time refrigeration interruption or low-power heating is started for defrosting according to the thickness of the frost layer or a pressure difference signal. And the formed ice layer is forcibly removed by switching the flow direction of the refrigerant and heating. By means of three-level linkage control, accurate defrosting in the whole process from prevention to removal is achieved, energy waste is effectively avoided, the defrosting efficiency and operation stability of the system are improved, and the user experience is improved.

The invention belongs to the technical field of heat pumps, and discloses a control method for defrosting and inhibiting frosting and a heat pump system. The control method for defrosting and restraining frosting comprises the steps that S1, whether the heat pump system enters a defrosting mode or not is judged according to the coil pipe temperature Te, the environment temperature T1 and the accumulated operation time t of a compressor; if yes, executing the step S2; if not, executing the step S3; s2, whether the return water temperature Tin reaches the preset temperature T2 or not is judged, and if Tin is larger than or equal to T2, the four-way valve conducts reversing defrosting, and the opening degree of the first electronic expansion valve is adjusted; if Tin is smaller than T2, the first electronic expansion valve is closed, the second electronic expansion valve is opened, and the opening degree of the second electronic expansion valve is adjusted so that bypass defrosting can be conducted; and S3, entering a heating mode. According to the control method for defrosting and inhibiting frosting, when the heat pump system is controlled to normally heat, after heating and heat supply meet the target set temperature, frosting prevention of the fin heat exchanger is carried out in advance; and the plate heat exchanger is prevented from frost damage during defrosting, and normal operation of the plate heat exchanger is guaranteed.

The invention provides a condenser type refrigeration cycle intelligent adaptation control method and system, and relates to the technical field of refrigeration. The method comprises the steps that environment state parameters are obtained, the environment frost point temperature is calculated, and an altitude correction factor representing the air side heat exchange capacity is calculated; executing boundary contraction transformation on a preset compressor operation envelope based on the altitude correction factor, and determining an allowable condensing pressure upper limit; an evaporator temperature response sequence is monitored, the time domain integral cumulant of the temperature response sequence relative to the environment frost point temperature is calculated, and the allowable evaporation temperature lower limit is dynamically increased based on the cumulant; constructing a target operation domain according to the allowable condensation pressure upper limit and the allowable evaporation temperature lower limit; and determining a current operation working point, and adjusting the control variable to enable the operation working point to fall into the target operation domain. The safety of the condensation side and the frost prevention stability of the evaporation side can be considered under the high-altitude and complex environment working conditions, and the continuous operation reliability of refrigeration circulation is improved.

The invention provides a heat pump intelligent control method and system for hierarchical defrosting, and the method comprises the steps: collecting the temperature of an inlet and an outlet of a fin, calculating the temperature difference and the change rate thereof, and evaluating the initial state of frosting; and the influence of the frost layer on the system performance is further analyzed in combination with the water side heat exchange efficiency and the attenuation rate thereof. Based on the information, the controller accurately judges mild, moderate and severe frosting states by using a frosting grade scoring function, and automatically matches corresponding defrosting strategies: when the frosting state is mild, the heating mode is maintained, and online defrosting is carried out; when the temperature is moderate, a progressive bypass is adopted for defrosting; and switching to a refrigeration mode and dynamically adjusting the opening degree of the expansion valve to strengthen the defrosting effect when the temperature is heavy. The defrosting precision and the system stability are improved, and the operation efficiency and the user experience of the heat pump equipment in the low-temperature environment are improved.

The invention discloses an ultralow-temperature vacuum pump with an efficient air compression function, and relates to the technical field of low-temperature vacuum pumps, the ultralow-temperature vacuum pump comprises a low-temperature vacuum pump body, the low-temperature vacuum pump body comprises a barrel, an inner cavity of the barrel is fixedly connected with a cold plate body, and the bottom of the barrel is fixedly communicated with a backing pump; a defrosting mechanism is arranged on the surface of the barrel; according to the ultralow-temperature vacuum pump with the efficient air compression function, by arranging the defrosting unit and the dehumidification unit, the purpose of reducing frosting can be achieved, when the low-temperature vacuum pump operates, moisture is effectively prevented from entering the low-temperature vacuum pump, and the air compression efficiency is improved. The frosting speed of the adsorption cold plate in the low-temperature vacuum pump is reduced, so that the adsorption time of the adsorption cold plate is prolonged, meanwhile, frost on the surface of the adsorption cold plate can be effectively removed, and the operation duration of the low-temperature vacuum pump and the utilization rate of equipment are improved.

The defrosting device structurally comprises a base, universal wheels fixedly connected to the lower end face of the base, a collecting box arranged on the rear end face of the base and inserted into the rear end face of the base in a sliding connection mode, and an electric push rod fixedly connected to the upper end face of the base. During use, an electric push rod is started to push a supporting plate to move, meanwhile, a telescopic support is telescopically unfolded, a second C-shaped plate and a first C-shaped plate drive a T-shaped heat conduction plate to make contact with a frost face, a small electric push rod is started to drive a second sliding block and a first sliding block to move, and meanwhile a notch A is meshed with a small gear, so that the first sliding block and the second sliding block are driven to move; the first connecting plate and the second connecting plate are relatively driven to move in a reciprocating mode, meanwhile, the friction plate is driven to rub with the T-shaped heat conduction plate, heat is generated, the temperature of the T-shaped heat conduction plate is increased, the heat is transmitted to the frost surface to be melted while the T-shaped heat conduction plate makes contact with the ice surface, and then defrosting can be conducted.

An air conditioner defrosting method. In the air conditioner's heating process, after the end of every defrosting procedure, the temperature of the outdoor heat exchanger coil and the time used over the course of the defrosting procedure can be measured and recorded. The defrosting situation of the air conditioner is reflected, and an initial determination of whether there is frost accumulation is made. After the initial determination, the air conditioner continues carrying out the heating procedure, and when specific conditions are met, it carries out a third defrosting procedure. When second determination results indicate that there is frost accumulation, the frost accumulation problem is deemed to be quite severe with a risk of icing up, and it is necessary to conduct forced intervention and carry out forced defrosting steps.

The invention relates to the technical field of geological disaster prevention and control, and particularly discloses a freeze-thaw collapse event risk early warning method based on an adaptive weighting algorithm and LSTM, and the method comprises the steps: S1, obtaining and collecting multi-source spatio-temporal data, and obtaining a unified data set; s2, obtaining an index vector of each moment; s3, obtaining a normalized feature vector; s4, obtaining a weighted feature vector at the moment; s5, obtaining prediction risk sequences from a short period to a middle period; s6, obtaining risk early warning output for emergency response and a repair strategy; according to the method, an adaptive weighting algorithm based on contribution degree evaluation is introduced, so that the model can dynamically adjust the relative importance of each input index under different time windows and environment conditions. Compared with a static weight method, the mechanism can automatically amplify physical driving factors directly associated with freeze-thaw collapse, such as the influence of short-term snow melting rate, ground temperature gradient or sudden rainfall accumulation, and meanwhile, inhibits event-independent or noise indexes.

The invention discloses a heat pump equipment control method and device, a medium and heat pump equipment, and relates to the technical field of heat pumps, the method comprises the steps that low pressure, return air temperature, environment temperature and air humidity are received, and the defrosting ending duration from the last defrosting period is determined; determining an evaporation temperature according to the low pressure; when the evaporation temperature and the air return temperature are both lower than the target temperature and the defrosting ending duration is longer than the target interval duration, the heat pump equipment is controlled to enter a defrosting mode; wherein the target temperature is determined according to the environment temperature and the air humidity, and the target interval duration is determined according to the air humidity. Defrosting can be avoided when no frost exists, so that the energy efficiency is improved, defrosting can be carried out in time, and the defrosting cleanliness is improved.

The present application relates to the technical field of household appliances, in particular to a dehumidifier and a control method thereof. The control method of the dehumidifier comprises: obtaining a first temperature of an evaporator; determining an actual frost accumulation time according to whether the first temperature is less than a first preset temperature; and judging whether the evaporator meets a first defrosting condition according to the actual frost accumulation time. According to the present application, whether the evaporator meets the first defrosting condition is judged according to the actual frost accumulation time, which can improve the accuracy of defrosting judgment, thereby reducing the possibility of invalid defrosting, and further avoiding the problem of dehumidification efficiency reduction caused by too long defrosting time.

The utility model belongs to the technical field of evaporators, and particularly relates to a freezing evaporator assembly which comprises a base. An evaporator main body is mounted on one side in the base; a blower device shell is fixedly connected to one side of the exterior of the base; a first servo motor is mounted in the blower device shell; the output end of the first servo motor is fixedly connected with fan blades; in the long-term use process of the freezing evaporator, due to the facts that the surface temperature of the freezing evaporator is low, frosting and freezing are likely to occur, too thick frost blocks air circulation, the heat exchange efficiency is reduced, and the refrigerating effect is poor, when frost appears on the surface of the evaporator body, the defrosting effect can be achieved only by opening the heating piece, and the defrosting efficiency is improved. And the influence of thicker frost on the refrigeration effect is reduced.

The utility model discloses an evaporator thermal insulation structure of a snowflake machine, which belongs to the technical field of snowflake machines and comprises a barrel-shaped evaporator main body, one end of the evaporator main body is provided with a first rotating shaft, the other end of the evaporator main body is open, and a fixed cover is provided with an end cover which is provided with a second rotating shaft. A first thermal insulation plate and a second thermal insulation plate are arranged at the two ends of an inner cavity of the evaporator body respectively. According to the structure, the temperature isolation function of the first thermal insulation plate and the second thermal insulation plate is utilized to block heat transfer between a high-pressure refrigerant and the two ends of the evaporator body, so that the high-pressure refrigerant can only complete heat transfer with the arc-shaped side face of the evaporator body, and liquid can only frost on the arc-shaped side face of the evaporator body; due to the fact that the high-pressure refrigerant cannot conduct heat transfer with the two ends of the evaporator body, the defect that liquid is frosted at the two ends of the evaporator body can be effectively overcome, cooling capacity waste is reduced, it can be guaranteed that the evaporator body can rotate stably, and practicability is high.

The invention discloses a micro-area fogdrop-airflow synergistic rime formation method and system, and relates to the technical field of artificial rime formation, and the method comprises the following specific steps: step 1, dividing and preparing a test area; 2, parameters of a fog drop generation system are set; 3, setting parameters of an airflow generation system; 4, fog drops are generated and distributed; 5, conveying airflow generated by the airflow generation system to the micro-area through a pipeline, and arranging a flow guide device at an outlet of the pipeline for further adjusting the direction and speed distribution of the airflow; meanwhile, in the airflow conveying process, the airflow temperature is monitored and adjusted in real time through the temperature control device, and it is guaranteed that the airflow temperature is stabilized within the set range. According to the micro-area fog drop-airflow synergistic rime forming method and system, by accurately regulating and controlling generation and distribution of micro-area fog drops and the speed, direction and temperature of airflow, accurate control over the rime forming process is achieved, the rime forming efficiency and the simulation effect are improved, and the requirements of different fields for rime forming research are met.

The utility model relates to the field of air energy heat pump swimming pool machines, in particular to a low-temperature defrosting system of an air energy heat pump swimming pool machine, which comprises a fan, an evaporator, a four-way valve and a controller, the fan, the evaporator and the four-way valve are all in communication connection with the controller, airflow output by the fan is guided to the evaporator, a wind speed detector is mounted on the evaporator, and the four-way valve is connected with the controller. The wind speed detector is in communication connection with the controller. The air speed detector is installed on the evaporator, the air speed detector is in communication connection with the controller, the air speed detector judges the frosting condition on the surface of the evaporator by detecting the air speed on the evaporator and feeds back the frosting condition to the controller, and the controller controls whether the four-way valve enters the defrosting action or not according to the frosting condition. And the frost-free defrosting condition is reduced, and the operation cost is reduced.

The application provides a kind of hierarchical defrosting heat pump intelligent control method and system, method includes: collecting fin import and export temperature calculation temperature difference and its change rate, assesses the initial state of frost formation;Then combine water side heat exchange efficiency and its attenuation rate, further analyze the influence of frost layer on system performance.Based on this information, the controller uses the frost formation level score function to accurately determine the mild, moderate and severe frost formation state, and automatically matches the corresponding defrosting strategy: maintain heating mode and online defrosting when mild;Progressive bypass defrosting is used when moderate;Switch to refrigeration mode and dynamically adjust the expansion valve opening when severe to enhance the defrosting effect.The application not only improves the defrosting accuracy and system stability, but also improves the operating efficiency and user experience of heat pump equipment in low temperature environment.

A kind of micro-channel heat exchanger heat pump system and its working method, the micro-channel heat exchanger heat pump system includes compressor, four-way reversing valve, indoor heat exchanger, micro-channel heat exchanger, 4 ball valves, 2 throttles;Micro-channel heat exchanger works when in frosting condition, there is the problem that frost rate is faster, heat exchange performance attenuates faster, in addition, in defrosting process, there is also the problem that defrosting water is more difficult to remove, and defrosting efficiency is low;The present application proposes a kind of micro-channel heat exchanger heat pump system and its working method, in frosting process, utilize the high-temperature refrigerant heat and compressor waste heat of indoor heat exchanger to heat low-temperature refrigerant, improve evaporation temperature, delay frost, in defrosting process, utilize the heat source provided by compressor waste heat, shorten defrosting time, improve defrosting efficiency.

The invention discloses an air conditioner and a defrosting judgment method thereof, electronic equipment and a storage medium. The method comprises the steps that environment parameters and system operation parameters are collected; and a plurality of real-time judgment indexes and a frosting risk index F are obtained based on the environment parameters and the system operation parameters, and if any real-time judgment index does not meet the corresponding preset requirement and F is larger than a set threshold value F0, it is judged that the air conditioner needs to be defrosted. According to the method, the multiple real-time judgment indexes and the frosting risk index F are obtained on the basis of the environment parameters and the system operation parameters, double verification is conducted by combining the real-time judgment indexes and the frosting risk index F, then whether the air conditioner evaporator needs to be defrosted or not is judged, the accuracy rate is higher than that of the prior art depending on a single temperature difference index, and therefore the technical problems of mistaken defrosting and delayed defrosting are solved.

The invention discloses a defrosting control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product.The air conditioner outdoor heat exchanger comprises at least two defrosting areas capable of being dynamically divided, and each defrosting area is connected with a compressor exhaust pipeline through an independent bypass pipeline; the bypass pipeline is provided with a bypass electronic expansion valve used for adjusting flow and a bypass electromagnetic valve used for controlling on-off. The method comprises the steps that during heating, an outdoor heat exchanger surface heat image is collected, frost layer distribution and thickness are analyzed and recognized, and a frost layer distribution diagram is generated; according to the image, areas needing to be defrosted and areas not needing to be defrosted are determined from the defrosting areas; for the area needing to be defrosted, a bypass electromagnetic valve corresponding to a bypass pipeline is controlled to be opened, the opening degree of a bypass electronic expansion valve is adjusted, and the high-temperature refrigerant flows into the area to be defrosted; and for the area without defrosting, the bypass electromagnetic valve corresponding to the bypass pipeline is controlled to be closed, so that the refrigerant keeps the heating circulation flow direction to continuously supply heat to the indoor space. According to the scheme, the defrosting efficiency and stability are improved.

The present invention provides a frost layer monitoring and defrost control device and a control method for a refrigeration system. The refrigeration system includes an evaporator and a fan. The frost layer detection and control device includes: a pressure differential sensor, which collects static pressure difference data before and after the evaporator at a specified time interval t1 under low-temperature refrigeration conditions; a control module, which is communicatively connected to the pressure differential sensor module, calculates and outputs a real-time pressure loss coefficient PLF of the evaporator based on the static pressure differential data; and controls whether the refrigeration system enters a defrost mode based on the pressure loss coefficient PLF. The present invention only needs to measure the static pressure difference before and after the evaporator, and based on the theory of a one-dimensional constant flow energy equation, performs dimensionless processing on the measured static pressure difference data, and obtains the pressure loss coefficient PLF to determine whether to defrost. It does not require a complex control method or a frost diagram, has a moderate cost, and is conducive to promotion. It effectively solves the problem that the traditional defrosting method controlled by the pressure differential sensor is affected by the evaporator type and fin structure, and realizes precise defrosting.

Systems and methods implementing a frost sensor comprising a substrate (S); and sub-sensors disposed on the substrate. The sub-sensors comprising: a resistance-based sub-sensor (RSS) formed of a first trace disposed on S in a winding pattern and configured to measure a temperature; a capacitance-based sub-sensor formed of a second trace defining a first electrode and a third trace defining a second electrode (wherein (i) the first and second electrodes comprise interdigitated fingers or other interdigitated structures (including, but not limited to, round, spiral interdigitated electrodes, etc.) configured to detect a change in capacitance due of frost, ice or water, and (ii) the second trace is integrally formed with the first trace); and another RSS formed of a fourth trace defining a third electrode and a fifth trace defining a fourth electrode (wherein (i) the third and fourth electrodes comprise interdigitated fingers or other interdigitated structures (including, but not limited to, round, spiral interdigitated electrodes, etc.) configured to detect a change in resistance due to the frost, ice or water, and (ii) the fourth trace is integrally formed with the third trace).

The present invention discloses a frost-free air-source heat pump steam generator, comprising a low-temperature stage circulation system, a high-temperature stage circulation system, and a water system. The evaporator of the low-temperature stage circulation system is an air-source evaporator equipped with a water heat exchange pipeline on the air inlet side. The low-temperature stage circulation system is connected to the high-temperature stage circulation system via an evaporative condenser. The refrigerant gas of the high-temperature stage circulation system is evaporated by spraying water outside the heating tube of a vertical shell-and-tube heat exchanger to produce water vapor. The refrigerant liquid of both the low-temperature stage circulation system and the high-temperature stage circulation system first undergoes throttling and gas-liquid separation. The refrigerant gas generated after throttling is used to heat the feed water. The liquefied refrigerant liquid and the separated liquid are then throttled and enter the corresponding evaporator to absorb heat and evaporate. The present invention combines an air-source heat pump with an efficient steam generation heat exchanger, ensuring sufficient steam supply while effectively solving the problem of frosting and defrosting of the air-source evaporator in winter.

The invention relates to the technical field of panel defogging and defrosting, in particular to an efficient defogging and defrosting system for a front transparent panel of an intelligent two-wheeled vehicle, the surface temperature and the frost layer thickness of the transparent panel are detected through an environment sensing unit, the temperature and humidity inside and outside the vehicle are collected, and an intelligent control unit controls the defogging and defrosting of the front transparent panel according to the temperature and humidity data and the frost layer thickness collected by the environment sensing unit. And whether a demisting condition or a defrosting condition is achieved or not is judged, a hierarchical control strategy is executed according to the mist level or the frost layer thickness, and a transparent heating layer, an airflow regulation and control module, an auxiliary drying assembly and a low-temperature defrosting strengthening module in the transparent panel are controlled to conduct defrosting and demisting. According to the technical scheme, quick and efficient defrosting in the low-temperature environment can be achieved, efficiency is high, secondary icing and fogging are prevented, adaptability is high, and meanwhile the light transmittance of the transparent panel is guaranteed.

The utility model discloses an air energy ultralow-temperature heat pump, which belongs to the technical field of air energy heat pumps and comprises a water tank (a condenser is arranged in the water tank), an external unit (comprising an evaporator, a compressor and an electronic expansion valve) and an intelligent defrosting system. During working, the outdoor unit evaporator absorbs heat of external low-temperature air through the air blower, so that a refrigerant is evaporated and is compressed into high-temperature and high-pressure gas through the compressor, and then the high-temperature and high-pressure gas releases heat to water in the water tank condenser. And the condensed refrigerant liquid returns to the evaporator for circulation through throttling and pressure reduction. During operation, the infrared frosting detection sensor on the surface of the evaporator monitors frosting, and data are transmitted to the controller. When frosting reaches the set thickness, the controller starts the hot gas bypass electromagnetic valve, part of high-temperature refrigerant gas directly enters the evaporator to be defrosted, and meanwhile the electric heating fan is started for assisting. The heat pump can stably and efficiently heat in an ultralow-temperature environment, the defrosting period is prolonged, and reliable operation is guaranteed.

The application discloses a defrosting control method, an air conditioning unit and a computer readable storage medium, and comprises the following steps: when the first temperature sensing bag and the second temperature sensing bag are both within T0±a, timing is started; when the first temperature sensing bag or both the first temperature sensing bag and the second temperature sensing bag deviate from the interval of T0±a, timing is stopped, and one of the first temperature sensing bag and the second temperature sensing bag is selected as a main temperature sensing bag according to a preset selection logic; the frost formation rate z is calculated by substituting the maintenance time length t into a preset frost formation rate calculation formula, the current preset defrosting interval is determined according to the frost formation rate and the current outdoor environment temperature parameter, and it is judged whether the defrosting mode is entered. The application detects the pipe temperature and the environment temperature through the double-pipe temperature sensing bag, calculates the frost formation rate through the maintenance time length, judges the current frost formation interval, carries out defrosting treatment according to different frost formation intervals, does not need to additionally increase a humidity detection device, is more accurate in judging the frost formation interval of the unit, and achieves precise defrosting.