186 results about "Dewpoint temperature" patented technology

The invention relates to the technical field of electrical equipment state monitoring and fault early warning, and particularly discloses an electrical cabinet condensation risk online monitoring method and system, and the method comprises the steps: synchronously collecting the physical parameters of the same microscopic space point in an electrical cabinet; calculating the classical dew point temperature by adopting a Magnus formula; performing quantification processing on the air pressure micro-fluctuation data in the time window, and calculating information entropy of micro-air pressure fluctuation; the wall surface temperature gradient and the air flowing state are fused, and the equivalent dew point temperature is calculated; real-time safety margin is calculated, and the instantaneous change rate of the safety margin is solved; constructing a condensation risk trend index; comparing with a preset threshold value, generating an early warning signal and a risk diagnosis label, and completing condensation risk monitoring; the system comprises a multi-physical field sensing unit, an embedded processing unit, a self-adaptive control unit, a man-machine interaction unit and a communication unit which are integrated in the same shell.

The invention relates to the technical field of facility agriculture environment control, and discloses an anoectochilus formosanus growth environment temperature and humidity non-electrical variable adjustment method, which comprises the following steps: acquiring dry-bulb temperature and relative humidity, calculating real-time dew point temperature, and generating a dew point approximation index; when the dry-bulb temperature is higher than a set value to trigger cooling, monitoring the relationship between the index and a security defense threshold value; when the index is lower than a threshold value, the humidification starting permission is locked, and ventilation is driven; when the index is higher than a threshold value, locking is relieved, and humidification output is limited according to the dry-bulb temperature drop rate, so that the dew point rise rate is lower than the dry-bulb temperature drop rate. By establishing the dew point defense boundary and asynchronous decoupling control logic, the problem of transient condensation caused by response time constant mismatch in a multivariable coupling system is solved; the risk of microscopic condensation of leaf surfaces is eliminated, and high-precision lossless regulation and control of the anoectochilus formosanus growth environment are realized.

The invention relates to the technical field of refrigeration equipment state monitoring and data analysis, and discloses a freezer remote monitoring and fault prediction system, which comprises the steps of intercepting operation data of a freezer in a door closing silence period, calculating an environment dew point temperature sequence and extracting a unit temperature difference load fluctuation ratio sequence of a refrigeration system; based on the time change rate of the environment dew point temperature sequence and the unit temperature difference load fluctuation ratio sequence, an instantaneous cross bispectrum coupling potential energy sequence representing the nonlinear modulation relation of the time change rate and the unit temperature difference load fluctuation ratio sequence is constructed; then, a two-dimensional phase space hysteresis track is constructed with the environment dew point temperature sequence as the horizontal axis and the instantaneous cross bispectrum coupling potential energy sequence as the longitudinal axis, and the cross bispectrum hysteresis entropy of the dew point driving type load volatility is calculated based on the probability density distribution of the track and the directed circulation area; and finally, judging an operation state and outputting a fault prediction result by verifying whether the entropy value is within a historical reference interval.

This application belongs to the technical field of air compressor safety, and particularly relates to a safety operation method for a piston air compressor. A safety operation method for a piston air compressor includes the following steps: S1, a flexible baffle is provided on an air-cooled plate cooler connected to the piston air compressor; S2, temperature data of each cooling unit at the current moment is obtained, and at the same time, the temperature change trend and the opening area change trend of the air outlet end of each cooling unit are obtained; S3, according to the pressure dew point temperature of the air outlet end of each cooling unit at the current moment, the opening area of each cooling unit at the current moment is adjusted to change the coverage degree of the flexible baffle on the air-cooled flow channels of each cooling unit at the next moment, so that the temperature of the air outlet end of each cooling unit is always above the corresponding pressure dew point temperature. This application can尽量避免活塞式空压机在运行的过程中发生冰堵或油乳化,保证活塞式空压机的安全运行。 It should be noted that there is an unclear part in the original Chinese text "尽量避免活塞式空压机在运行的过程中发生冰堵或油乳化,保证活塞式空压机的安全运行。" which may need to be further clarified for a more accurate translation. The above translation is based on the best understanding of the current text.

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 relates to the technical field of safety operation and maintenance of power equipment, in particular to an active anti-condensation control method, system and equipment for a switch cabinet and a medium, which are applied to an active anti-condensation control system for the switch cabinet and used for preprocessing operation environment data of the switch cabinet acquired by a sensing layer based on a data acquisition unit; cabinet body surface temperature fusion and dew point temperature calculation are carried out based on the risk research and judgment unit, a dynamic condensation risk index and a global risk index are obtained, and a risk level is judged through the obtained dynamic condensation risk index and a preset threshold value; and according to the risk level and the global risk index, based on a cooperative control unit and according to a preset multi-mode control strategy, generating a control instruction to perform active condensation prevention of the switch cabinet. Therefore, the early condensation trend is pre-judged, and faults such as insulation reduction and metal corrosion caused by condensation formation are effectively avoided.

The invention discloses a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, and the method comprises the steps that in the refrigeration operation process of the air conditioner, whether the current environment is in a temperature and humidity state needing preferential dehumidification or not is determined according to the indoor environment temperature and the indoor relative humidity; if it is determined that the current environment is in the temperature and humidity state needing preferential dehumidification, the frequency of a compressor and the rotating speed of an inner fan are adjusted, and the air conditioner executes dehumidification operation; after the dehumidification operation is completed, the environment dew point temperature is calculated based on the indoor environment temperature and the indoor relative humidity; dynamically adjusting the running frequency of the compressor and the rotating speed of the inner fan according to the environment dew-point temperature and the evaporator surface temperature to enable the evaporator surface temperature to be higher than the environment dew-point temperature. According to the scheme, the anti-condensation response speed is increased, the control precision and the environmental adaptability are improved, and the balance of efficient dehumidification and stable anti-condensation is achieved.

The invention discloses an air conditioner condensation prevention control method, device and system and an air conditioner, and belongs to the field of air conditioner condensation prevention. The air conditioner anti-condensation control method comprises the steps that after target parameters are obtained, a target threshold value is obtained through calculation based on the target parameters; and when the temperature difference value of the evaporator surface temperature and the dew point temperature is smaller than the target threshold value, anti-condensation control is conducted. According to the scheme, the threshold value is dynamically determined based on the indoor air humidity and the operation frequency of the compressor, and the threshold value is substantially the allowable minimum temperature difference safety boundary between the evaporator surface temperature and the dew point temperature. When it is monitored that the actual temperature difference between the two is lower than the dynamic threshold value, the controller automatically starts an anti-condensation measure; condensation can be prevented in time, condensation and water dripping of the indoor unit are prevented, the comfort level of a user can be guaranteed as much as possible, and the user experience is improved.

The present application relates to the technical field of electrical equipment state monitoring and fault early warning, and specifically discloses a kind of electrical cabinet condensation risk on-line monitoring method and system, the method comprises: the physical parameters of the same microcosmic space point in electrical cabinet are synchronously collected;Adopt the formula of Magnus to calculate classical dew point temperature;Quantitative processing is carried out to the air pressure microfluctuation data in time window, and the information entropy of micro air pressure fluctuation is calculated;Fusion wall temperature gradient and air flow state, calculate equivalent dew point temperature;Calculate real-time safety margin, and solve the instantaneous change rate of safety margin;Condensation risk trend index is constructed;Compared with the preset threshold, generate early warning signal and risk diagnosis label, complete condensation risk monitoring;The system includes integrated in the same shell multiple physical field sensing unit, embedded processing unit, adaptive control unit, man-machine interaction unit and communication unit.

The invention discloses a humidity control method and system of a liquid-cooled battery cabin, a medium and a program product, and relates to the technical field of liquid-cooled battery cabins, and the humidity control method comprises the following steps: respectively collecting an environment temperature and a dew point temperature in the liquid-cooled battery cabin, and a water outlet temperature and a water return temperature of a cooling liquid; the environment temperature, the outlet water temperature and the return water temperature are compared; the lowest temperature in the environment temperature, the outlet water temperature and the return water temperature serves as the dehumidification starting temperature; calculating a humidity control temperature according to the dehumidification starting temperature and the dew point temperature; and the dehumidifier is controlled to be turned on or turned off according to the relation between the humidity control temperature and a preset temperature threshold value. According to the technical scheme, condensate water can be effectively prevented from being formed, it is guaranteed that the temperature and humidity in the battery compartment are kept within the safe range, then the working energy efficiency of the dehumidifier is improved, battery performance reduction and static electricity accumulation are avoided, the service life of a battery is prolonged, and the operation safety of the battery compartment is guaranteed.

The invention discloses a high-pressure special gas cylinder filling anti-condensation method and system and a medium. The high-pressure special gas cylinder filling anti-condensation method comprises the steps that S1, the dew point temperature Tdp of a high-pressure special gas cylinder filling environment is obtained through calculation; s2, real-time monitoring of the surface temperature Tsurface of the gas cylinder is completed, and the saturation temperature Tsat of the preset gas in the filling process is obtained through calculation; and S3, filling rate control is conducted, specifically, gas filling rate control is completed based on the gas cylinder surface temperature Tsurface, the dew point temperature Tdp and the filling process saturation temperature Tsat, so that the gas cylinder surface temperature Tsurface is higher than the dew point temperature. By dynamically calculating the relation between the environment dew point temperature and the gas cylinder saturation temperature, the filling rate is adjusted in real time, the filling efficiency is improved on the premise that condensate water is not generated, and the high-precision filling requirement is met.

The invention discloses a closed cooling tower control method for performing dynamic dew point temperature tracking based on an AI algorithm model, the control method is used for controlling a closed cooling tower, and the control method comprises the following steps: step 1, collecting data in real time; step 2, data preprocessing; step 3, in a decision-making stage of AI algorithm model reasoning, the central controller carries the AI algorithm model of a supervised learning pre-training and reinforcement learning online optimization hybrid architecture, and outputs an optimal cooling mode based on the preprocessed data; 4, cooling mode execution and mode switching are carried out, and the central controller controls all the modules to execute the corresponding cooling modes in the dry cooling mode, the evaporation cooling mode and the collaborative cooling mode according to the model instructions; 5, closed-loop feedback: monitoring and adjusting the running state, and after the cooling mode is executed, continuously monitoring the running state by the system to form closed-loop optimization; and 6, processing a special scene.

The invention provides a drying control method of an air conditioner and a related product. The method comprises the steps that when the operation mode, used for drying, of the air conditioner is a refrigeration mode for drying, the indoor humidity and the indoor temperature are obtained; determining target humidity according to the indoor humidity; determining a dew point temperature according to the target humidity and the indoor temperature; and controlling a compressor and / or an indoor fan of the air conditioner according to the dew point temperature. According to the scheme, the problems that an existing air conditioner is low in clothes drying efficiency and poor in clothes drying effect are solved, and the purpose of improving the user experience is achieved.

The application discloses a condensation prevention control method, a cooling device and a refrigerating unit. The cooling device is used for cooling a heat generating component. The condensation prevention control method comprises the following steps: detecting the ambient temperature and the ambient humidity where the heat generating component is located and calculating a dew point temperature T0; judging whether the ambient humidity exceeds a set humidity limit value; if yes, performing an ambient temperature rising action, and starting the cooling device when the actual temperature of the heat generating component is greater than the dew point temperature T0; and if no, starting the cooling device when the actual temperature of the heat generating component exceeds a set limit temperature. The application combines the ambient temperature and humidity where the heat generating component is located with the actual temperature of the heat generating component, reasonably determines the starting time of the cooling device, and designs the condensation prevention and heat dissipation control action only for the cooling device, so that the condensation phenomenon of the heat generating component is effectively prevented, and the reliability of the refrigerating unit is greatly improved.

The utility model relates to a kind of coating device with antiskid conveying structure, core improvement is to replace the first over roller of traditional metal over roller of winding guide roller group with plastic material and the first over roller of surface being equipped with antiskid structure, to solve traditional technical defects.Plastic material friction coefficient is higher than metal, can naturally promote and the contact friction of flexible copper-clad plate substrate, surface antiskid structure is matched, can further increase effective contact area, make friction force multiple level promotion, ensure that flexible copper-clad plate substrate is stably and uniformly conveyed to winding mechanism.Meanwhile, plastic thermal conductivity is far lower than metal, surface temperature is little by environmental temperature and humidity fluctuation, not easy to reduce to dew point temperature below, reduce the condensation of over roller surface water vapor from the source, greatly reduce the probability of dewing, both eliminate the negative influence of water droplet on friction coefficient, consolidate antiskid effect, prevent flexible copper-clad plate substrate from being damp and deforming, improve the reliability and service life of final product.

The application belongs to the technical field of electrical appliances, and particularly relates to a humidity control method, device, equipment and storage medium of a steam cooking equipment, which comprises the following steps: obtaining a target dew point temperature of an inner container according to an ambient temperature of the steam cooking equipment and a target humidity of the inner container; obtaining a cooking control parameter of the steam cooking equipment according to a dew point temperature of the inner container of the steam cooking equipment and the target dew point temperature of the inner container; obtaining temperature change information of the inner container during the control of the humidity of the inner container of the steam cooking equipment according to the cooking control parameter, and judging whether the humidity of the inner container meets a cooking control parameter compensation condition according to the temperature change information of the inner container; if yes, obtaining a compensated cooking control parameter according to the temperature change information; and controlling the humidity of the inner container of the steam cooking equipment according to the compensated cooking control parameter. The application avoids the influence of the hysteresis or overshoot phenomenon of humidity control on the humidity control effect, and improves the accuracy and flexibility of humidity control.

This application relates to the field of constant temperature and humidity control technology, and discloses a control method and control device for a constant temperature and humidity chamber, as well as the chamber itself. The control method for the constant temperature and humidity chamber includes: acquiring the internal temperature, internal humidity, and surface temperature of the main evaporator of the chamber; calculating the dew point temperature based on the internal temperature and humidity; determining whether the main evaporator has a concealed dehumidification function based on the surface temperature and dew point temperature; and, if a concealed dehumidification function exists, controlling the constant temperature and humidity chamber to execute a preset optimized control logic in terms of humidity control. This application can improve the stability of humidity control in a constant temperature and humidity chamber.

Embodiments of the present application provide a dehumidification control method, a control device, a dehumidification system and a storage medium. The method is applied to a dehumidification system including a dehumidification device and a fan, and includes: in the case that the environmental humidity and / or the environmental dew point temperature of a current environment meets a dehumidification condition, determining a target running state of the dehumidification device and a target running state of the fan according to a dry-bulb temperature, the environmental dew point temperature and a preset start-up dew point temperature; wherein the start-up dew point temperature is used to indicate the start-up of the dehumidification device; and controlling the dehumidification device and the fan to run in the target running state of the dehumidification device and the target running state of the fan respectively. The method is used to achieve the effect of effective dehumidification in various different scene environments.

The utility model discloses an anti-condensation liquid-cooling cold source system and a charging pile, and relates to the technical field of heat dissipation equipment, in particular to the anti-condensation liquid-cooling cold source system and the charging pile, the anti-condensation liquid-cooling cold source system comprises a liquid-cooling circulation, the liquid-cooling circulation comprises a liquid storage tank, a pump body, a heat exchanger and a radiator which are sequentially connected in series and closed, cooling liquid circularly flows in the liquid-cooling circulation, and the heat exchanger is used for being in contact with equipment to be cooled for heat exchange; according to the anti-condensation liquid cooling cold source system, the temperature and humidity sensor is additionally arranged to monitor the environment temperature and humidity, then the current dew point temperature is calculated in real time, the temperature of cooling liquid in the liquid storage tank is regulated and controlled with the dew point temperature as the reference, the situation that the temperature of equipment to be cooled is lower than the dew point temperature is avoided, condensation of the equipment to be cooled is avoided, and the service life of the equipment to be cooled is prolonged. And the electromagnetic valve is arranged at the heat exchanger in parallel, rapid heat exchange between the liquid storage tank and the external environment is achieved through work of the radiator in liquid cooling circulation, then the working time of refrigeration circulation is shortened, and the overall energy consumption of equipment is reduced.

The application relates to the technical field of power distribution cabinet monitoring, and discloses a power distribution cabinet operation state intelligent monitoring method and an intelligent monitoring system. The power distribution cabinet operation state intelligent monitoring method comprises the following steps: step S101, three-point median filtering processing; step S102, dew point temperature calculation; step S103, dew potential calculation; step S104, update of an asymmetric hysteresis moisture storage state; step S105, nonlinear risk power calculation; step S106, online risk index calculation; step S107, self-normalization intensity calculation; and step S108, output of the power distribution cabinet operation state. The application focuses on the influence of cold spot condensation, embodies the hysteresis characteristics of the wet state of an insulating surface, avoids the problem that a fixed threshold value is difficult to adapt to different cabinet working conditions, realizes continuous monitoring of an implicit insulation deterioration risk, and the output operation state can provide corresponding basis for power distribution cabinet operation and maintenance.

The invention provides a building condensation intelligent monitoring and early warning method and method based on the Internet of Things, and the method comprises the steps: collecting the indoor and outdoor temperature and humidity, surface temperature, air volume, window control state, time-of-use electricity price and other multi-source data through an Internet of Things sensor, and carrying out the time synchronization, abnormality elimination, interpolation and normalization processing, constructing a state vector containing the dew point temperature; calculating a condensation risk index based on the temperature difference, determining an early warning time window by using a time sequence prediction model, and forming a safety constraint set in combination with the comfort level, the equipment working condition and the noise upper limit; defining a control action set according to the risk state and the constraint condition, and constructing a physical approximation and data driving fused environment response model; designing a reward function based on risk, energy consumption and comfort deviation, and training a control strategy through reinforcement learning; the method achieves the active prediction and intelligent prevention and control of the condensation risk of the building, gives consideration to the energy consumption and comfort, and has the characteristics of self-learning, self-adaption and high reliability.

The invention discloses an air conditioner control method and device for condensation, a medium and an air conditioner, condensation risk parameters and dynamic dew point temperature of a target device are obtained, condensation risk levels of the device are determined by combining the condensation risk parameters and the dynamic dew point temperature, and corresponding condensation response actions are executed. Therefore, according to the scheme, a traditional fixed threshold value judgment mode is abandoned, accurate grading judgment on the condensation risk is achieved based on the actually-collected parameters and the dynamic dew point temperature, misjudgment on the actual condensation occurrence risk can be effectively avoided, meanwhile, targeted prevention and control actions are made by adapting to working condition changes in different actual environments, and the accuracy of the condensation risk judgment is improved. Therefore, the condensation phenomenon of the device can be effectively avoided in various actual environments.

The invention discloses a control method and system for a rotary dehumidification system, and the control method comprises the steps: switching the operation mode of a regenerated air treatment system based on a preset target dew point temperature, and adjusting the opening degree of an adjusting control valve based on the operation mode; detecting the dew point temperature in the current target environment, and calculating the difference value between the dew point temperature and the target dew point temperature to obtain a first difference value; and when the first difference value is larger than a first preset value, the regenerated air temperature is detected, and the rotating speed of the rotary dehumidifier is adjusted based on the regenerated air temperature. Based on the control method of the rotating wheel dehumidification system, the performance, the applicability and the stability of the whole rotating wheel dehumidification system are improved.

The utility model relates to a throw-in type high-temperature dew point measuring sensor, which comprises a shell and a crystal resonator, a flange-shaped fixing part is formed on the outer wall of the shell, the shell is limited into an upper part and a lower part by the fixing part, and the lower half part of the shell is inserted into a gas environment or a cavity to be detected; an air chamber for refrigeration is formed in the shell, and the air chamber is provided with an air inlet and an air outlet; the bottom of the shell is provided with a containing cavity communicated with the air chamber, the crystal resonator is fixed in the containing cavity, and the crystal resonator outputs resonant frequency parameters or equivalent electrical parameters of the crystal resonator through a first lead. According to the invention, the method can achieve the judgment of the dew formation moment in a high-temperature environment, and achieves the measurement of the dew point temperature on the basis.

The application relates to the technical field of grain depot ventilation prediction, and discloses a grain storage ventilation decision-making method based on GNN and Cross-Attention, which comprises the following steps: collecting internal temperature and humidity data of a grain depot, external temperature and humidity data of the grain depot, weather data and grain pile temperature data in real time; respectively pre-processing collected grain pile temperature data and weather data, and calculating grain balance relative humidity, atmospheric dew point temperature and grain dew point temperature as inputs of a pre-trained ventilation decision-making model to obtain a classification result of ventilation decision-making; and based on the temperature and humidity information of internal air of the grain depot, ventilation of the grain depot is comprehensively decided in combination with external temperature and humidity, dew point data and weather data and other information, grain depot temperature characteristics are more accurately extracted, and the grain depot ventilation decision-making is more reliable.

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.

The application discloses a temperature and humidity system and a control method for isotope production micro cascade, which comprises a central control system, the central control system is connected with a cold source system, a terminal system, a delivery system and a monitoring system through a communication cable; the cold source system comprises a plurality of air-cooled heat pump units and operation screens thereof; the terminal system comprises a plurality of jet air conditioning units and control cabinets thereof; the delivery system comprises a circulating water device, a water supplement device and control cabinets thereof; and the monitoring system comprises temperature and humidity sensors and a dew point temperature instrument. The application can realize cooling and heating of a hall. The terminal adopts an independent air supply mode, can be controlled in a partitioned manner and achieves the purpose of energy saving. The delivery end adopts a same-path design, so that the water force of each device is balanced. The temperature and humidity system can meet the process requirements of the temperature and humidity and the dew point temperature of a workshop, reduces the installation difficulty, saves investment and improves economic benefits.

The invention relates to the technical field of heat management and safety control of energy storage systems, and discloses a heat management method and device of an energy storage system and a medium. According to the current dew point temperature, a safe water outlet temperature set value of the liquid cooling system is determined, and the safe water outlet temperature set value is higher than the current dew point temperature; a theoretical outlet water temperature set value is obtained based on the battery temperature requirement; and comparing the theoretical outlet water temperature set value with the safe outlet water temperature set value, and determining an outlet water temperature control target of the liquid cooling system according to the larger value so as to control the liquid cooling system. According to the method, the dew point temperature in the energy storage system is calculated, the lowest safe water outlet temperature is set, collaborative decision making is carried out on the lowest safe water outlet temperature and the theoretical water outlet temperature based on the battery temperature requirement, and optimal balance of safety and energy efficiency is achieved while the condensation risk is restrained.

The embodiment of the invention belongs to the refrigerator technology, and provides a refrigerator and an anti-condensation control method thereof, a storage medium and a program product, and the refrigerator comprises a refrigerating system, a temperature sensor, a control device and a fan; the refrigerating system, the temperature sensor and the fan are all connected with the control device; the control device is used for obtaining the air humidity of the external environment when the refrigerating system and the fan are turned off and the temperature of the target chamber is lower than the dew point temperature. And when the air humidity of the external environment exceeds the preset humidity, a fan is started at the fan rotating speed positively correlated with the air humidity of the external environment while the refrigeration system is kept closed. According to the method, the rotating speed of the fan can be intelligently adjusted according to the environment humidity condition in the non-refrigeration time period of the refrigerator, so that air entering the target chamber is rapidly dehumidified, the condensation risk is reduced, and the energy loss of fan rotation can be reduced while dehumidification is achieved.

The application discloses a dew point temperature control system of a light composite environment simulation test box, and belongs to the technical field of extreme climate light composite environment simulation test. In view of the problem that the existing light environment simulation test box cannot be compatible with low-temperature and high-temperature and high-humidity extreme climate environment simulation test due to condensation of light glass, the dew point temperature control system of the light composite environment simulation test box is automatically controlled by using light-transmitting double-layer glass devices and software, the temperature of the interlayer glass is automatically adjusted by the control system according to a test program, the temperature of the interlayer glass is always higher than the dew point temperature corresponding to the temperature and humidity in the test chamber, the condensation phenomenon of the light glass is fundamentally avoided, the composite light environment simulation test of the test box under the extreme climate of low temperature-50 DEG C, high temperature 125 DEG C and humidity 20%-95% is realized, the accuracy of test results is ensured, and the test standard requirements are met.