148 results about "Wet-bulb temperature" patented technology

The invention discloses an intelligent air conditioner water chilling unit control method and system based on predictive optimization. Operation data and weather forecast data are collected to establish a dynamic response reference, building cold load sudden change opportunity is recognized, the mismatching relation between magnetic suspension frequency and wet bulb temperature is detected, and energy-saving opportunity recognition data is generated to determine a cooling starting judgment table; identifying equipment response delay characteristics by using a dynamic response reference, extracting time sequence advantage parameters to determine dislocation configuration among multiple pieces of equipment, and generating coordination control parameters; cloud-local transmission delay analysis is carried out according to the coordination control parameters, and a coordination control sequence is generated through buffer opportunity identification and delay compensation; mechanical refrigeration suppression data is generated through energy efficiency mode classification, free cooling potential mining is implemented to form a cold source optimization factor, and an emergency response strategy is generated; an emergency response strategy is used to identify a multi-device linkage trigger critical zone, a prediction correction feedback network is constructed, a global collaborative optimization instruction is generated, and the system operation efficiency and the control precision are improved.

The invention discloses an air conditioner efficiency test system and a control method of an air conditioner efficiency test platform. The method comprises the following steps: dynamically adjusting the air dry bulb / wet bulb temperature of a test room of an existing test bed based on a dynamic temperature control adjusting technology; acquiring a real-time building thermal load of the test room through a building thermal load prediction simulator; the dynamic change of the air dry-bulb temperature of the test room is calculated in real time through the indoor air dry-bulb temperature prediction simulator; and the dynamic change of the air wet bulb temperature of the test room is calculated in real time through the indoor air wet bulb temperature prediction simulator. According to the invention, the problem that the dynamic operation energy efficiency and performance parameters of the tested air conditioner cannot be obtained through the enthalpy difference method test bench because the existing enthalpy difference method test bench cannot control the dynamic change process of the building thermal load of the test room along with the refrigeration / heating capability of the tested air conditioner in the prior art is solved; and the actual operation performance level of the air conditioner cannot be reflected.

The invention discloses a baking method suitable for upper leaves of a flue-cured tobacco variety K326. The method comprises the following steps: S1, harvesting upper leaves of mature tobacco plants and loading them into a tobacco loading chamber of a flue-curing barn; and S2, baking the loaded upper leaves, wherein the baking comprises an early yellowing stage, a middle yellowing stage, a late yellowing stage, an early color fixation stage, a middle color fixation stage, a late color fixation stage, and a tendon drying stage. The dry-bulb temperature steadily increases in the seven stages of the early yellowing stage, the middle yellowing stage, the late yellowing stage, the early color fixation stage, the middle color fixation stage, the late color fixation stage, and the tendon drying stage. The wet-bulb temperature exhibits a "V"-shaped change in the five stages of the middle yellowing stage, the late yellowing stage, the early color fixation stage, the middle color fixation stage, and the late color fixation stage. In the middle yellowing stage and the late yellowing stage, the dry-bulb temperature remains unchanged, showing "double 39-40°C and double 41-42°C", respectively, while the wet-bulb temperature decreases by 0.5-1°C in the latter stage of each stage. The method bakes the upper leaves, significantly reducing the ash content and proportion of the upper leaves, increasing the hue of the tobacco leaves, and improving the proportion of tobacco leaf grades, thereby significantly improving the baking quality of the upper leaves and the income of tobacco farmers.

The present invention discloses a flue-curing method for reducing ash on upper tobacco leaves. The method shortens the yellowing time at or before 38°C, maintains the same dry-bulb and wet-bulb temperatures at 40°C, stops the circulating fan, reduces the temperature and humidity difference between different tobacco layers in the flue-curing barn, then lowers the wet-bulb temperature. This process is repeated to cause the tobacco leaves to soften, wilt, and turn yellow. The dry-bulb temperature is then raised to 44°C, causing the main ribs to soften. The high temperature is then returned to 42°C, and the wet-bulb temperature is lowered by 1-2°C at 42°C to control the water loss of the tobacco leaves to 40-45%, inhibiting the activity of polyphenol oxidase and promoting yellowing. The dry-bulb and wet-bulb temperatures are then lowered by 1-2°C at the initial color setting stage, slowing the heating rate. A medium temperature, medium humidity, and slow heating are used for color setting in the middle color setting stage. The temperature is then slowly increased in the later color setting stage. The flue-curing time at a steady temperature of 54°C is extended to increase the water loss and dryness of the tobacco leaves. The wet-bulb temperature is increased during the dry rib drying stage. This method can significantly reduce the occurrence of ash on tobacco leaves and improve the appearance quality of the upper tobacco leaves after curing.

The invention provides a heat pump unit, an air conditioner and a control method. When the heat pump unit is in a refrigeration mode, the outdoor wet-bulb temperature is larger than or equal to a wet-bulb temperature threshold value, and the outdoor dry-bulb temperature is larger than a dry-bulb temperature threshold value, the series flow path and the first bypass flow path are both in a conducting state. In other words, part of the refrigerant is adopted for heat exchange through a series flow path which is formed by connecting the air-cooled condenser in series and then connecting the evaporation cold condenser in series, and the other part of the refrigerant is synchronously adopted to cross the air-cooled condenser and directly enter the evaporation cold condenser for heat exchange, so that the evaporation cold condenser can participate in heat exchange more sufficiently; the energy efficiency of the whole heat pump unit is improved, and the refrigeration use experience of a user is improved.

The present invention discloses a method for baking tobacco leaves on the upper part of a white eel mud tobacco field. The method comprises the following steps: spraying a nutrient solution on the leaves before harvesting, appropriately reducing the maturity of tobacco leaves during harvesting, appropriately reducing the amount of tobacco leaves to be woven, reducing the density of tobacco leaves to be loaded on a kang, adopting a baking technology of high temperature main yellowing, early dehumidification in the later stage of yellowing, and gradually reducing the wet-bulb temperature during baking, reducing the yellowing degree of tobacco leaves during switching to another fire, adopting a low temperature, low humidity, slow temperature rise baking technology for color fixing during the color fixing period, gradually increasing the wet-bulb temperature in the early stage of color fixing, and adopting a fast drying baking technology in the dry-stem period. By adopting the method for baking tobacco leaves on the upper part of a white eel mud tobacco field, the difficulty of color fixing of the upper tobacco leaves can be effectively reduced, the ash on the upper tobacco leaves can be reduced, and the appearance quality and intrinsic quality of the tobacco leaves after baking can be improved.

The invention relates to the technical field of household appliance testing, and discloses a dryer testing system which comprises a tested device and a circulating air supply unit, the circulating air supply unit comprises an air duct, and the two ends of the air duct are detachably matched with an air outlet and an air inlet of the tested device respectively, so that a closed loop for airflow circulation testing is formed. An airflow processing module and a detection module are arranged in the air duct, the airflow processing module is used for adjusting the temperature, humidity and air pressure of flowing airflow, and the detection module is used for obtaining dry and wet bulb temperature and air speed parameters of the airflow at the air outlet and the air inlet, so that the drying speed and efficiency of the tested equipment are measured through an enthalpy difference method. According to the system, waste heat carried by exhausted gas is recycled firstly, brand new air does not need to be heated from the room temperature state, and therefore energy consumption in the testing process is remarkably reduced.

The invention discloses a concrete stirring refrigeration energy efficiency optimization control method and system, and relates to the field of stirring refrigeration control, and the method comprises the steps: firstly, carrying out the thermodynamic analysis of the environment temperature and humidity and the real-time load of a water chilling unit, and determining a cooling water temperature dynamic search space with the environment wet bulb temperature as the lower limit; on the basis, estimated power consumption of a cooling tower fan and a water chilling unit compressor at different cooling water temperature points is simulated by utilizing a dual-equipment energy consumption response prediction model, and a golden temperature point capable of enabling the total power consumption of the system to reach the minimum is positioned through global optimization. And finally, with the global optimal set temperature value as a target, the frequency of the fan is adjusted through PID control. According to the scheme, island type control logic is broken through, environmental potential and equipment characteristics are deeply fused, the energy consumption game relationship between the fan and the compressor is balanced in real time, and it is ensured that the refrigerating system always keeps the optimal comprehensive energy efficiency of the whole system under changeable climates and loads.

The application relates to the drying technical field and discloses a method for controlling a heat pump roasting room, the heat pump roasting room comprising: a heat pump roasting room body, the heat pump roasting room body being provided with an air valve, the heat pump roasting room body being divided into multiple areas, and a wet bulb temperature sensor being correspondingly arranged in each area; the method comprising the following steps: determining a current wet bulb temperature sensor participating in controlling the on-off state of the air valve during roasting; determining a target sensor in the case that the current wet bulb temperature sensor has a water shortage fault; and controlling the on-off state of the air valve according to parameters acquired by the target sensor. In this way, the on-off state of the air valve can be controlled based on parameters acquired by other sensors in the case that the current wet bulb temperature sensor has a fault. The roasting process does not need to be interrupted, the humidity of a roasting environment can be accurately determined, and the roasting quality of materials is ensured. The application further discloses a device for controlling a heat pump roasting room, a heat pump roasting room and a storage medium.

The invention relates to the technical field of air conditioners, in particular to a control method of a low-temperature cold water indirect evaporative cooling air conditioning system which comprises a heat exchange core, a mechanical refrigeration assembly, a water tank, a spraying pipe, a heat exchanger and a three-way valve. The heat exchange core body comprises a dry channel and a wet channel. The system has a sensible heat cooling mode and an evaporation heat absorption mode, when water needs to be supplemented to the system, the sensible heat cooling mode is operated, moisture in outdoor inlet air can be separated out, and therefore water is supplemented to the system; when an evaporation heat absorption mode is operated, different states can be operated according to the outdoor environment dry-bulb temperature and the outdoor environment wet-bulb temperature, so that different working conditions can be adapted; in addition, the mechanical refrigeration assembly directly supplies cold to cooling liquid between the water tank and the spraying pipe through the heat exchanger, an evaporator does not need to be arranged at a dry channel outlet of the heat exchange core body to supply cold to indoor return air, air resistance is reduced, and annual energy consumption of an indoor fan is reduced.

The present invention discloses an evaporative condenser, a method for controlling the fan frequency thereof, and an air-conditioning unit. Among them, the method includes: determining whether the air wet-bulb temperature at the outlet of the indoor fan is within a preset temperature range; if so, adjusting the frequency of the fan of the evaporative condenser according to the enthalpy difference between the inlet and outlet air of the evaporative condenser; if not, adjusting the frequency of the indoor fan according to the air wet-bulb temperature at the outlet of the indoor fan, and then adjusting the frequency of the fan of the evaporative condenser according to the enthalpy difference between the inlet and outlet air of the evaporative condenser. The present invention adjusts the frequency of the indoor fan according to the air wet-bulb temperature at the outlet of the indoor fan, and adjusts the frequency of the fan of the evaporative condenser according to the enthalpy difference between the inlet and outlet air of the evaporative condenser. Thereby, the dynamic adjustment of the indoor fan frequency and the evaporative condenser fan frequency is realized. The possibility of poor system operation stability and poor economy caused by too high or too low fan frequency is reduced.

The invention provides an evaporative cooling air conditioner control system for energy-saving operation of a low-condensation-temperature compressor, and relates to the technical field of automatic control, and the evaporative cooling air conditioner control system comprises an acquisition module which is used for acquiring the dry-bulb temperature and the wet-bulb temperature of outdoor air and the indoor return air temperature and the air supply temperature in real time, and calculating the heat transfer efficiency of a current air heat exchanger according to indoor and outdoor parameters; the judgment module is used for judging whether the current operation condition meets the operation condition of the indirect evaporative cooling mode or not according to the heat transfer efficiency and by combining the outdoor wet bulb temperature and the indoor set air supply temperature, and a judgment result is obtained; the control module is used for prohibiting starting of the compressor and utilizing a natural cold source if the judgment result meets the indirect evaporative cooling mode condition; and if the judgment result shows that indirect evaporative cooling cannot meet the refrigeration requirement, the compressor is allowed to be started, and mechanical cold supplementing is conducted. The energy consumption is effectively reduced, the refrigeration efficiency is improved, and energy-saving and efficient operation is achieved.

This invention discloses a baking process for improving the baking quality of the upper tobacco leaves of Guiyan 36, comprising the following steps: After loading the tobacco, close the loading door, turn on the automatic temperature and humidity control equipment, close the air inlet, and turn on the circulating fan for 1-2 hours; ignite the fire, raising the dry bulb temperature to 34.0℃-35.0℃ and the wet bulb temperature to 34.0℃-35.0℃, and bake at a stable temperature for 4-6 hours; then, raise the dry bulb temperature to 38.0℃ and the wet bulb temperature to 37.0℃, and bake at a stable temperature until the high-temperature layer tobacco leaves are 40-50% yellow; then, raise the dry bulb temperature to 42.0℃ and the wet bulb temperature to 37.0℃-38.0℃, and bake at a stable temperature until the high-temperature layer tobacco leaves are 70-80% yellow; then... Keep the dry-bulb temperature constant, and decrease the wet-bulb temperature from 37.0℃~38.0℃ to 36.0℃, 35.0℃, 34.0℃, and 33.5~33.0℃ in sequence. Then, control the wet-bulb temperature to remain constant at 33.5~33.0℃ and bake at a stable temperature and humidity until more than half of the leaf veins in the high-temperature layer turn white and shiny, the main veins soften and wilt, and the leaf tips dry for 5~10cm. After that, proceed to the color fixing stage and the rib drying stage in sequence.

The embodiment of the invention provides a refrigeration system and a refrigeration box, and relates to the technical field of refrigeration. The refrigeration system comprises a semiconductor refrigeration subsystem, a first water tank, an atomizer and a first air duct; the first water tank is connected with the atomizer and used for supplying water to the atomizer; a hot end fan of the semiconductor refrigeration subsystem is arranged in the first air duct, one end of the first air duct is provided with an opening part used for being communicated with the external environment, an atomizing nozzle of the atomizer is arranged in the first air duct, and the atomizing nozzle is arranged between the opening part of the first air duct and the hot end fan. Therefore, by additionally arranging the first water tank and the atomizer, the humidity of air is gradually increased, the temperature of the air is greatly reduced and gradually approaches the wet bulb temperature, and then the air enters the hot end fan under the guidance of the first air duct to cool a hot end radiator of the semiconductor refrigeration subsystem, so that the temperature of the hot end of a semiconductor refrigeration sheet can be greatly reduced; the energy efficiency and the refrigerating capacity of the system are improved.

The application provides an electrical equipment heating and dehumidification control method and a control terminal. The electrical equipment heating and dehumidification control method comprises the following steps: obtaining a dry-bulb temperature, a wet-bulb temperature and a current atmospheric pressure, and determining a current dew point temperature according to the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure; determining a target temperature according to the dew point temperature; and controlling a heater in the electrical equipment to be turned on until the temperature in the electrical equipment reaches the target temperature. The application determines the dew point temperature by comprehensively considering the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure, determines the dew point temperature by comprehensively considering various factors of a scene, and controls the heater according to the dew point temperature, so that condensation can be effectively avoided, and the dehumidification effect is good.

The invention discloses a fan control method and device of a cooling tower and the cooling tower, and relates to the field of refrigeration. Determining a target water outlet temperature of the cooling tower according to the wet bulb temperature; determining the initial operation frequency of a fan of the cooling tower based on the current outlet water temperature and the target outlet water temperature of the cooling tower, and controlling the fan to operate; if the outlet water temperature is within the temperature interval where the target outlet water temperature is located, the operation power of the draught fan is controlled to be unchanged; otherwise, the operation power of the fan is adjusted based on the outlet water temperature and the target outlet water temperature. As the wet bulb temperature represents the lowest environment temperature which can be reached only by evaporating water, if the target outlet water temperature is lower than the wet bulb temperature, the motor can continuously output water at a higher frequency, but the temperature cannot reach the target outlet water temperature. By reasonably setting the target outlet water temperature, the energy waste of the operation of the fan can be reduced. The operation frequency of the fan is adjusted based on the actual temperature difference, and the operation efficiency of the fan is improved.

The utility model relates to a temperature and humidity adjusting and testing device of a battery plate curing chamber, which comprises an indoor water tank positioned inside the curing chamber and an outdoor water tank positioned outside the curing chamber, the outdoor water tank is communicated with the indoor water tank, a water inlet pipe is mounted on the outdoor water tank, and a floater ball valve is mounted on the water inlet pipe. Overflow holes are formed in the tank wall of the outdoor water tank; a dry-bulb temperature probe and a wet-bulb temperature probe are arranged in the curing chamber, the dry-bulb temperature probe and the wet-bulb temperature probe are arranged in parallel up and down, the dry-bulb temperature probe is located at the upper part of the wet-bulb temperature probe, the wet-bulb temperature probe is wrapped by water-absorbing gauze, and the water-absorbing gauze is partially immersed in the liquid level of the indoor water tank. Compared with the prior art, the temperature and the humidity in the curing chamber can be monitored more accurately and timely, the liquid level height of the water tank in the curing chamber can be better controlled, and the problem that the humidity in the curing chamber is reduced slowly in the polar plate drying stage due to overflow is solved.

The application discloses a kind of control method and system of intelligent air conditioner cold water unit based on prediction optimization, collection operating data and weather forecast data establish dynamic response benchmark, identify building cold load mutation opportunity and detect the mismatch relationship of magnetic suspension frequency and wet bulb temperature, generate energy-saving opportunity identification data to determine cooling start determination table;Using dynamic response benchmark to identify equipment response delay characteristics, extract time sequence advantage parameter to determine the misplacement configuration between multiple devices, generate coordination control parameters;According to the coordination control parameter, cloud-end-local transmission delay analysis is carried out, and the coordination control sequence is generated by buffer timing identification and delay compensation;Through energy efficiency mode grading, mechanical refrigeration suppression data is generated, free cooling potential is excavated to form a cold source optimization factor, and an emergency response strategy is generated;Using emergency response strategy to identify multi-device linkage trigger critical zone, build prediction correction feedback network, generate global collaborative optimization instruction, improve system operation efficiency and control precision.

The invention provides a multi-stage HFO refrigerant condensing device and a control method, and relates to the technical field of refrigeration equipment, the device comprises a first water distributor and a spiral water distributor, and the spiral water distributor is used for collecting cooling water passing through a first gas channel and guiding the cooling water into a second gas channel; a second water distributor and a condensation evaporation heat exchanger are arranged in the second gas channel; the second gas channel is used for cooling circulating gas through second cooling water and conducting heat exchange between the cooled gas and third cooling water sprayed out of the second water distributor and the HFO refrigerant in the condensation evaporation heat exchanger. Through the synergistic effect of multi-stage cooling and low-temperature water and low-temperature air, the system can still maintain the condensation temperature of an HFO refrigerant to be lower than the wet bulb temperature even in the extreme humid and hot environment with the wet bulb temperature as high as 30 DEG C, it is ensured that natural cooling and continuous and stable operation are conducted all the year round, and dependence on mechanical refrigeration energy supplementation is avoided.

The invention discloses a building central air conditioning system artificial intelligence mixing rule control system, which comprises a data acquisition layer, an edge calculation unit, a dynamic optimization controller, a cloud verification platform and a hotel management system, and is characterized in that the data acquisition layer comprises a chilled water branch return water temperature sensor array, an environmental parameter acquisition module and a building operation monitoring terminal; chilled water branch return water temperature sensor arrays are arranged on the oblique section of the main return water pipeline and are annularly distributed at equal intervals in the circumferential direction of the pipeline; the environmental parameter acquisition module is provided with a dry-wet bulb temperature transmitter and a solar radiation intensity sensor; and the building operation monitoring terminal and the hotel management system communicate in real time through an OPC protocol to obtain guest rate data and conference room reservation information. Therefore, according to the artificial intelligence mixed rule control system for the building central air conditioning system, through collaborative optimization of a traditional control rule and an artificial intelligence algorithm, dynamic load accurate response, multi-target balance control and system sustainable evolution capacity of cold machine group control are achieved.

The invention discloses a comprehensive energy complementation energy-saving operation method, device and system, and the method comprises the steps: determining a target hot water use amount according to a dry-bulb temperature and a wet-bulb temperature predicted in the whole day, and the occupancy rate of a room; according to the target hot water use amount, the water use peak period and the water use non-peak period, the hot water use amount needed to be used hour by hour in the Mingming day is determined; in the first time period, the first operation duration of the heat pump is determined with the minimum total cost according to the hot water using amount required to be used hourly in the whole day, the water using duration in each time period and the heat recycled by the air cooling unit; and in the second time period, the second operation time length of the heat pump is determined by minimizing the total cost according to the hot water consumption required to be used hour by hour in the whole day, the water consumption time length in each time period, the heat recovered by the air cooling unit and the heat corresponding to the solar energy. By adopting the technical scheme, the maximum economic benefit of multi-energy complementary operation can be realized.

The invention relates to the technical field of non-electrical variable control systems, in particular to an efficient spray drying process for plant extracts, which comprises the following steps: correcting wet bulb temperature according to real-time atomization pressure of a tower top, determining a real-time wet bulb temperature correction value, determining a real-time tower top temperature difference value in combination with an initial Tg value, and performing spray drying on the plant extracts according to the real-time tower top temperature difference value. The system is used for implementing closed-loop control on the inlet air temperature of a tower top constant-speed drying area, determining the real-time water content in a tower according to the difference between a real-time material actually-measured water content detection value and a water content speculative value, obtaining a real-time Tg value corresponding to the water content in the tower, determining a real-time temperature difference value of a speed-reduction curing area by combining the real-time material temperature of the speed-reduction curing area, and controlling the temperature of the tower top constant-speed drying area according to the real-time temperature difference value. The method is used for carrying out closed-loop control on the inlet air temperature of a tower-bottom speed reduction curing area in the middle of the tower. Through self-adaptive control of the efficient spray drying process, the production stability is high, the energy consumption is lower, and the product quality is improved.

The invention provides a three-stage cooling air cooler applied to a data center. The three-stage cooling air cooler comprises a sensible heat air cooler, a condensation air cooler, a fan assembly, a spraying assembly and a supercooling air cooler, and the sensible heat air cooler conducts sensible heat cooling on a CO2 working medium; the fan assembly is used for controlling air flow; the spraying assembly is used for spraying water mist to achieve cooperative heat exchange with air. The condensation air cooler, the draught fan assembly and the spraying assembly conduct heat exchange through water mist and air. The supercooling air cooler is used for carrying out dew-point evaporative cooling; the controller is configured to obtain a dry-bulb temperature and a wet-bulb temperature; and based on the dry-bulb temperature and the wet-bulb temperature, a sensible-heat air cooler, a condensation air cooler, a fan assembly, a spraying assembly and a supercooling air cooler are controlled to execute an operation mode. According to the three-stage cooling air cooler, the working medium flow is optimized through a three-stage cooling structure, cooperative heat exchange with the air side is achieved, the heat exchange efficiency is improved, and the pressure drop loss is reduced.

This application belongs to the field of power system disaster prevention technology, and provides a method, device, electronic equipment, and storage medium for predicting icing areas. The method includes: acquiring atmospheric reanalysis datasets, site observation datasets, and terrain elevation datasets; preprocessing and filtering icing elements in the above data to obtain data based on freezing rain and climate fusion datasets, terrain feature tensors, and icing element data; inputting the obtained data into a pre-trained terrain adaptive convolutional network Monte Carlo random deactivation model, outputting the average probability of freezing rain and the standard deviation of uncertainty; inputting the average probability of freezing rain, the standard deviation of uncertainty, 10-meter high wind speed, wet-bulb temperature, supercooled precipitation, preset time step, icing density, and conductor equivalent radius into a Makkonen calibration model, outputting the predicted icing thickness; determining the predicted icing area based on a preset region, the predicted icing thickness, and preset conditions; thus improving the prediction accuracy of icing thickness and icing area.

The application provides an air conditioner energy efficiency test method, an indoor side temperature and humidity dynamic adjustment method in a test process, an air conditioner energy efficiency test system, a computer device and a readable storage medium. The indoor side temperature and humidity dynamic adjustment method comprises the following steps: obtaining an outdoor dry bulb temperature at a current time, an outdoor wet bulb temperature at the current time, an indoor dry bulb temperature at the current time and an indoor wet bulb temperature at the current time; an air conditioner energy efficiency test unit measures each energy efficiency parameter of the air conditioner in real time within a preset test period; according to the outdoor dry bulb temperature at the current time, the outdoor wet bulb temperature at the current time, the indoor dry bulb temperature at the current time, the indoor wet bulb temperature at the current time and at least part of the energy efficiency parameter at the current time, the indoor dry bulb temperature at a next time after a preset time interval and the indoor wet bulb temperature at the next time are calculated; and the indoor dry bulb temperature and the indoor wet bulb temperature of the air conditioner energy efficiency test unit are adjusted according to the indoor dry bulb temperature at the next time and the indoor wet bulb temperature at the next time. The method can measure the dynamic energy efficiency of the air conditioner in the process of the dynamic change of the indoor side dry bulb temperature and the indoor side wet bulb temperature, and can reflect the energy efficiency level of the air conditioner in actual operation.

This invention discloses a method for improving the curing quality of upper tobacco leaves under arid conditions. This method targets upper leaves in arid climates, characterized by a compact structure, low leaf water content, and water bound to cellular tissue. During the yellowing stage, a dry-bulb temperature of 42-43℃ and a wet-bulb temperature of 38-39℃ are used to keep the stomata on both sides of the leaf open, ensuring the smooth removal of moisture from the tobacco leaf and allowing O2 from the curing barn to continuously enter the leaf through the stomata, aiding in the degradation of macromolecular organic matter and thus guaranteeing the quality of the tobacco leaf. This invention improves the curing quality of upper leaves under arid climates and reduces the occurrence of ash and discoloration during the curing process.

The utility model relates to the field of temperature and humidity measuring equipment, and particularly discloses a dry and wet bulb temperature and humidity inspection recorder, which comprises even number of temperature sensors, a multi-channel temperature acquisition instrument, a touch control screen and a communication module, the multi-channel temperature acquisition instrument comprises a plurality of acquisition channels, and each temperature sensor is connected with the plurality of acquisition channels of the multi-channel temperature acquisition instrument through a spaceflight plug; the communication module transmits processing data of the multi-channel temperature acquisition instrument to the touch controller, and the touch control screen records the data acquired by the multi-channel temperature acquisition instrument and calculates temperature and humidity parameters according to a set program. The utility model solves the problems that the conventional recorder does not have the function of measuring the relative humidity by using the temperature of a dry-wet bulb, and the precision and the stability are not favorably maintained in the standard detection in a complex environment when the humidity is measured by using a capacitive humidity sensor.

The present invention relates to the technical field of tobacco drying, and specifically provides a baking control method for a tobacco dryer, which aims to solve the problem that after the existing dryer is turned on, the preset value of the dry-bulb and wet-bulb temperatures in the first baking stage is relatively low, which leads to frequent opening of the fresh air vent and the dehumidification port for dehumidification, thereby reducing the baking quality of tobacco leaves with low moisture content. To this end, the baking control method of the present invention includes: controlling the dryer to enter a heating stage, and controlling the dryer not to enter a dehumidification mode during the heating stage; and at the end of the heating stage, judging whether the dryer needs to enter a dehumidification mode. The present invention sets a pre-baking stage before the dryer performs baking in the yellowing stage, and does not perform dehumidification during the heating stage of the pre-baking stage, so as to avoid the tobacco from precipitating a large amount of moisture when the moisture content is low. At the same time, at the end of the heating stage, it is judged whether dehumidification is performed. Dehumidification can remove part of the moisture, so as to avoid the moisture content in the baking room being too high to damage the tobacco.

The invention discloses an air conditioner and a control method and device thereof, a storage medium and a computer program product.The method comprises the steps that after the air conditioner is started and runs in a heating mode, the absolute moisture content of outdoor air is determined according to the outdoor dry-bulb temperature and the outdoor wet-bulb temperature of the air conditioner; under the condition that it is determined that the pipe temperature of the outdoor heat exchanger is smaller than or equal to 0, the humidity interval to which the absolute moisture content of outdoor air belongs in the preset humidity range is determined, and the air conditioner is controlled to enter a defrosting mode according to at least one of the air suction temperature and the air suction superheat degree of a compressor, the opening degree of a throttling device and the frequency of the compressor; and then the air conditioner is controlled to exit the defrosting mode according to the pipe temperature of the outdoor heat exchanger. According to the scheme, according to the humidity interval to which the absolute moisture content of the outdoor air belongs, the opportunities of entering the defrosting mode and exiting the defrosting mode of the air conditioner are accurately determined in a partitioned mode by combining control over the opening degree of the throttling device and the frequency of the compressor, the defrosting period is prolonged, and the comprehensive energy efficiency and the user experience of the air conditioner are improved.

The invention provides an air conditioning unit defrosting control method and system and an air conditioning unit. The method comprises the steps that the environment dry-bulb temperature and the environment wet-bulb temperature are collected in real time, and the dew-point temperature is calculated; the evaporation temperature is obtained; when the evaporation temperature is smaller than a preset threshold value, a defrosting mode is entered, and the defrosting mode comprises an air cooling defrosting mode and a refrigerant defrosting mode; a defrosting mode is selected according to the comparison result of the working current of the frequency conversion fan and the target current; and in the air cooling defrosting mode, the fan frequency is controlled according to the size relation between the evaporation temperature and the dew point temperature. According to the method, through defrosting judgment based on the evaporation temperature, flexible mode switching and dynamic air speed adjustment, on one hand, the reasonability of defrosting control is improved, and unnecessary defrosting operation is avoided; the adaptability and flexibility of the system are enhanced, and the system is suitable for different frosting degrees and operation states; and thirdly, the frequency adjustment of the fan is assisted through the dew point temperature, the efficiency and the energy consumption of the air cooling defrosting mode are optimized, and the overall energy-saving performance of the air conditioning unit is improved.