179 results about "Dew" patented technology

The present invention discloses a floor radiation cooling system and an anti-condensation control method, which relate to the technical field of radiation air conditioning. The method comprises: real-time collection of indoor temperature and humidity, electric three-way valve opening, water pump flow and fresh air unit parameters; using particle swarm algorithm (PSO) to optimize radial basis function neural network (RBF) weights and construct a PSO-RBF prediction model; inputting indoor air temperature, relative humidity, fresh air speed, fresh air humidity, valve opening and water pump flow into the model, outputting surface temperature and calculating condensation risk value with current dew point temperature, dynamically regulating fresh air speed and humidity to achieve anti-condensation; and adjusting the radiation surface temperature based on the PMV thermal comfort model to maintain thermal comfort. The method uses a dual control mechanism to ensure that the radiation surface is prevented from condensation while using the radiation surface to independently bear the sensible heat load, effectively avoiding mold growth and maintaining a stable indoor thermal environment.

The invention discloses a tunnel dew formation and icing rapid monitoring method and system based on a space-time phase change cooperation mechanism, and relates to the technical field of tunnel engineering safety monitoring and freeze injury prevention and control. Establishing a tunnel geometric model and a heat-humidity-turbulence multi-field coupling physical model; synchronously acquiring heat and humidity physical property parameters and outdoor hourly meteorological parameters; taking the outdoor hourly meteorological parameters as Dirichlet boundary conditions and initial conditions of a heat-humidity-turbulence multi-field coupling physical model; determining a heat and humidity exchange coupling process of the tunnel wall surface and the internal environment, and defining heat and humidity transfer parameters under an unsteady state boundary; performing discretization processing on the tunnel geometric model by adopting a grid division strategy; by setting a dew point temperature threshold value and an icing temperature threshold value, a condensation risk area is judged, dynamic changes of the thickness of an ice layer are quantified, and monitoring of tunnel condensation and icing is achieved. The method can effectively reflect the distribution rule of multiple physical fields on the surface and in the tunnel in any time, accurately judge the risk area and quantify the thickness of the ice layer.

The invention discloses an intelligent temperature and humidity control method applied to a process oven. The method comprises the following steps: analyzing future temperature and humidity predicted values in real time by adopting a dynamic prediction module; and the predicted value is simultaneously input to a dew point risk avoidance module and an MPC optimization module. The current dew point temperature is calculated through the dew point risk avoiding module, dew point risk judgment is conducted in combination with the material surface temperature monitored by the infrared sensor, and when it is detected that the surface temperature is close to a dew point threshold value, an instruction is sent to the gradient air supply control module. And the MPC optimization module performs rolling optimization on the air supply parameters through an objective function based on the predicted value. Therefore, the fuzzy-PID module is helped to dynamically adjust PID parameters, and accurate execution signals are output to a heater and a fan. The gradient air supply control module integrates the dew point risk instruction and the PID control signal, the oven is divided into a plurality of independent areas to execute differential regulation and control finally, the control precision of intelligent regulation of the operation state of the process oven is increased, and energy consumption is remarkably reduced.

The invention relates to the technical field of clean room environment control, and discloses a clean room environment control compensation method and system based on temperature and humidity independent combined control, and the method comprises the steps: collecting the infrared thermal imaging data of a clean room; infrared thermal imaging data of the clean room are processed into surface heat flux distribution through three-dimensional space interpolation reconstruction; detecting the air dew-point temperature and the particulate matter concentration of the clean room, and combining the air dew-point temperature and the particulate matter concentration into a dynamic heat and humidity load vector; determining a target temperature value and a target humidity value of the clean room; a first control instruction for a temperature adjusting device of the clean room is generated, and a second control instruction for a humidity adjusting device of the clean room is generated; controlling the temperature adjusting device to adjust the temperature of the clean room according to the first control instruction, and controlling the humidity adjusting device to adjust the humidity of the clean room according to the second control instruction. Through organic combination of multi-source sensing, dynamic modeling and decoupling control, the precision, adaptability, safety and energy efficiency level of clean room environment control are remarkably improved.

The invention relates to a coating sample anti-condensation performance simulation test device and an anti-condensation performance evaluation method. The simulation test device comprises an indoor environment simulation box and an inner wall temperature simulation device which is arranged in the indoor environment simulation box and is used for controlling the temperature of a sample to be tested. The evaluation method comprises the following steps: calculating the critical dew formation temperature of a sample to be tested and the temperature control temperature of the sample when the critical dew formation temperature is obtained, and calculating the difference between the critical dew formation temperature and the temperature control temperature so as to simulate the temperature difference between the critical dew formation temperature and the temperature control temperature in a test environment to evaluate the anti-dew formation performance of the sample to be tested. Compared with the prior art, the method has the advantage that the anti-condensation performance of the coating sample can be accurately evaluated.

The invention provides a cold plate surface anti-condensation control method and system based on model prediction, and the method comprises the steps: 1, obtaining cold plate surface temperature data and a cold plate surface condensation image when a liquid cooling plate operates for a preset period of time through a cold plate cooling experiment and CFD simulation, supercooling degree and condensation delay time data are obtained through the condensation image; 2, performing multi-parameter nonlinear fitting on the cold plate surface temperature data in the cold plate operation process to form a cold plate surface temperature prediction model; and step 3, utilizing the prediction model, controlling the MPC to control a fluid inlet valve of the cold plate through model prediction, and closing the valve before condensation on the surface of the cold plate. The MPC is controlled through model prediction to control the fluid inlet valve of the cold plate, the valve is closed before dew formation on the surface of the cold plate, the dew formation risk is remarkably reduced, the workload of a refrigeration system is reduced, the liquid cooling plate operates at a smaller safety temperature difference, and the reliability of the liquid cooling system is improved.

Control unit for room air dehumidification with two independent outputs for controlling a fan and a dehumidifier, wherein the control unit comprises means for measuring temperature and relative humidity in the interior and exterior areas, calculates the dew point of the interior and exterior air from the measured values, compares the dew points and, depending on adjustable threshold values ​​for the desired interior temperature and humidity, activates either the fan or the dehumidifier, wherein the control unit operates completely autonomously and can be operated without connection to digital networks, smart home systems, apps or external servers.

To provide a curtain wall capable of suppressing generation of dew condensation between an outdoor side panel and an indoor side panel.SOLUTION: A curtain wall is provided with: a panel space section S11 formed between an outdoor side panel 4B and an indoor side panel 4C; a desiccant space section S2 placed adjacent to the panel space section S11 to each other, in which desiccant 7 is arranged; and a communication passage 65 communicating the panel space section S11 with the desiccant space section S2, wherein the desiccant space section S2 is placed on at least one of the upper side and the lower side of the indoor side panel 4C.SELECTED DRAWING: Figure 3

The invention discloses a method and system for controlling air dryness and humidity in a tobacco leaf sealing stack, and relates to the technical field of air dryness and humidity control in the tobacco leaf sealing stack, and the method comprises the steps: measuring and recording initial environment parameters of a target tobacco leaf sealing stack, obtaining initial temperature, relative humidity and dew point temperature data, and marking the initial temperature, relative humidity and dew point temperature data as environment data; based on the initial environment data, a multi-layer sealing structure optimization and humidity buffer layer setting method is adopted to carry out optimization design on the sealing performance of the tobacco leaf sealing stack, and a sealing stack structure is obtained; based on the environment data, the temperature and the humidity in the sealed stack are adjusted by adopting a humidity dynamic regulation and control method, an optimal temperature and humidity adjustment scheme is calculated by utilizing an AI prediction model, and an adjusted temperature and humidity environment is obtained; and based on the adjusted temperature and humidity environment, dynamically adjusting the ventilation quantity or the heating power in the sealed stack by adopting a dew-point temperature compensation mechanism method to obtain a stable dew-point temperature environment.

The dehumidification and condensation prevention control method for the liquid cooling energy storage outdoor cabinet is low in cost and capable of effectively avoiding condensation and comprises the steps that S10, according to the current liquid outlet temperature T1 of a liquid cooling unit and the current liquid inlet temperature T2 of the liquid cooling unit, the target dew point temperature T3 is calculated and determined, and according to the current environment temperature and environment humidity in the liquid cooling energy storage outdoor cabinet, the environment dew point temperature T4 is determined; s20, the dehumidifier is controlled to be started and stopped according to the judgment result whether the environment dew-point temperature T4 is larger than or equal to the target dew-point temperature T3 or not; s30, the current liquid outlet temperature T1 and the current liquid inlet temperature T2 of the liquid cooling unit are obtained in the dehumidification process of the dehumidifier, a new target dew point temperature T3'is calculated and determined, and a new environment dew point temperature T4 'is determined according to the current environment temperature and environment humidity in the liquid cooling energy storage outdoor cabinet; and S41, according to the judgment result whether the difference delta T between the new environment dew point temperature T4'and the new target dew point temperature T3 'is smaller than a first preset temperature threshold value X with the value being negative or not, the dehumidifier is controlled to stop dehumidification or continue to keep dehumidification.

The invention provides a dimming film and dimming glass. Combined conductive leads are introduced to the first transparent conductive layer and the second transparent conductive layer to form a circuit, the current trend in the dimming film is changed, the dimming effect that the visible light transmittance gradually changes in the open state can be achieved, meanwhile, the function of heating the surface of the dimming film is achieved, the environmental influence of rain, snow, cold and dew can be eliminated, and the service life of the dimming film is prolonged. Good application prospects are realized.

The invention provides a heat pump ring fin difference control method and system based on dew-point temperature prediction, and the method comprises the steps: calculating the current dew-point temperature based on the air temperature and the relative humidity, and obtaining a future dew-point temperature sequence through linear weighting prediction based on historical dew-point data; generating a candidate control action set based on the current dew point temperature, the future dew point temperature sequence, the current fin temperature, the current opening degree of the electronic expansion valve, the rotating speed of the fan and the upper limit of the adjustment stride; screening candidate action subsets through an evaluation function; for each candidate action, using a semi-analytical system response simulator to predict a future fin temperature sequence, and calculating a difference sequence between the fin temperature and the dew point temperature based on the future fin temperature sequence; carrying out weighted calculation on a risk score for the difference value sequence of each action, and screening an action set based on a risk score threshold value; and an objective function is constructed, the action with the minimum objective function value is selected as the optimal control action, and the optimal control action is issued to the electronic expansion valve and the fan driver through PWM signals.

The invention relates to a method and system for obtaining dew condensation surfaces in the form of a film, using a surface to be treated, and to a high-performance dew collection system. Described is a method for producing dew condensation surfaces in the form of a film, based on the micrometric and nanometric modification of the original surface by means of a laser beam, said surface being formed as a flat tile with a plurality of parallel longitudinal grooves. The present invention also describes a passive, robust, durable, high-performance dew collection system.

The utility model relates to the technical field of dew collecting grooves, in particular to a novel dew collecting groove of a greenhouse, which comprises a W-shaped dew collecting groove, a connecting mechanism used for connecting the dew collecting grooves is arranged on the W-shaped dew collecting groove, the connecting mechanism comprises a connecting groove, the connecting groove is arranged at the right end of the W-shaped dew collecting groove, and the connecting groove is connected with the W-shaped dew collecting groove. A plurality of first connecting openings are formed in the connecting groove, and first connecting screws are rotationally connected into the first connecting openings. A connecting plate is fixedly connected to the left side of the W-shaped dew collecting groove, the size of the connecting plate is matched with that of the connecting groove, a plurality of second connecting openings are formed in the connecting plate, and plug-in type connection is achieved through cooperation of the W-shaped dew collecting groove and the connecting mechanism. The dew collecting tanks can be connected with one another quickly and effectively, water sources in the dew collecting tanks can be discharged in time, the situation that the water sources stay in the dew collecting tanks for a long time and corrode the dew collecting tanks is avoided, and safety is high.

The utility model provides a fog detection device. The mist detection device comprises a shell, a dew collecting cover, a refrigeration part, a main control board, a light source and a detector, the dew collecting cover is arranged at the top of the shell, an opening of the dew collecting cover faces the outside of the shell, the refrigeration part is arranged at the bottom of the dew collecting cover, and one end of the dew collecting cover is provided with a window and a transparent cover plate covering the window; the light source and the detector are arranged below the window, and the transmitting end of the light source faces the window. The main control board is electrically connected with the light source, the detector and the refrigeration part. Wherein the refrigerating part cools dew collected by the dew collecting cover, the dew collecting cover gathers the cooled dew to the transparent cover plate to form water drops, a transmitting end of the light source emits light beams, the light beams penetrate through the transparent cover plate, irradiate the water drops and are scattered, and the detector receives scattered light signals and outputs corresponding electric signals to the main control board. The main control board determines whether fog exists in the current environment according to the electric signal. The fog detection device is high in stability and low in cost.

To provide a power storage device capable of suppressing generation of dew condensation water in a case housing a cooler.SOLUTION: The power storage device 100 includes a power storage module 110, a case 140 housing the power storage module 110, a cooler 120 housed in the case 140, and a seal member 130. Cooler 120 includes an upper surface 125 in thermal contact with power storage module 110, and a lower surface 126 spaced apart from case 140. The seal member 130 is disposed at a position that prevents water vapor present in the S2 of the space inside the case 140 from coming into contact with the lower surface 126.SELECTED DRAWING: Figure 3

To suppress dew formation on a floor surface in a floor-standing type air conditioner having a lower blowout port.SOLUTION: A floor-standing type air conditioner 10 that can execute a heating operation and a humidification operation includes: a casing 72 having a flow passage with a suction port 72c, an upper blowout port 72a provided on the upper side and a lower blowout port 72b provided on the lower side; a fan 24 that generates an air flow from the suction port 72c toward each of the upper and lower blowout ports 72a, 72b in the flow passage; a heater 22 that heats air in the flow passage during the heating operation; and a humidifier 50 that humidifies the air in the flow passage during the humidification operation. After the heating operation and the humidification operation are started, until a predetermined condition is satisfied, blowing out of humidification air from the lower blowout port 72b is restricted.SELECTED DRAWING: Figure 1

To provide a show case for appropriately controlling an output of a due condensation proof heater in accordance with a change of a peripheral environment so as not to generate due condensation and not to perform excessive heating.SOLUTION: A show case includes: a due condensation proof heater 15 arranged in a decorative frame 9 being a due condensation generation place of a show case body 4; detection means 12, 13 of peripheral temperature and peripheral moisture in the show case; and a heater control section 20 for controlling an electrification amount to the due condensation proof heater 15. The heater control section 20 controls the electrification amount to the due condensation proof heater 15 on the basis of dew-point temperature calculated based on the peripheral temperature and the peripheral moisture detected by the detection means 12, 13 and also on the basis of the peripheral temperature.SELECTED DRAWING: Figure 5

This invention provides a dehumidification system that can stably control the dew point in a low-dew-point room based on weather conditions. [Solution] The dehumidification system estimates the predicted value of the outside air dew point at a predetermined date and time in the future based on weather forecast data. The dehumidification system also estimates the supply air inlet temperature, which indicates the temperature at the inlet of the supply air area, and the supply air inlet absolute humidity, which indicates the absolute humidity at the inlet of the supply air area, based on the inlet conditions of the supply air area. Then, based on the predicted value of the outside air dew point, the supply air inlet temperature, and the supply air inlet absolute humidity, the dehumidification system calculates the regeneration inlet target temperature, which indicates the target temperature at the inlet of the regeneration area at a predetermined date and time in the future. After calculating the regeneration inlet target temperature, the dehumidification system performs at least one of the following actions to bring the temperature of the regeneration heater closer to the regeneration inlet target temperature: temperature control of the regeneration heater, airflow control of the first fan installed on the inlet side of the supply air area in the first duct, and airflow control of the second fan installed on the outlet side of the regeneration area in the second duct.

In the present invention, obtained is a ventilation system in which inflow of outside air into a building makes it possible to curb the occurrence of condensation within the building, in a manner not limited to dirt floors.　A ventilation system (1) is provided with: a ventilation device (2) for ventilating a building (6) in which articles (5) are accommodated and which has an indoor space; thermal image sensors (4) for measuring the temperature of objects including the articles (5); and a ventilation control device (3) that compares temperature data of the objects measured by the thermal image sensors (4) and the dew-point temperature of outside-air outside the building (6), and if the temperature data of the objects is at or below the dew-point temperature of the outside air, that controls the ventilation device (2) so as to reduce the ventilation rate of the building (6).

The present invention relates to a device for spectroscopic measurements, in particular X-ray diffraction (XRD), tem- perature-resolved second harmonic generation (TR-SHG) or infrared (IR) measurements, which prevents the formation of condensation (dew) or ice (frost) when carrying out spectroscopic measurements in sub-ambient temperature conditions and to a method of spectro- scopic measurements with said device.

To provide a dew condensation prevention structure capable of preventing dew condensation around an air conditioner with simple constitution.SOLUTION: A dew condensation prevention structure (1) serves to suppress dew condensation caused in a circumference of an air conditioner (40) arranged in the ceiling of an indoor space (10). The dew condensation prevention structure (1) comprises: a ceiling material (20) which has its surface opposed to the indoor space (10), and includes a first region (21) surrounding all the sides of the air conditioner (40) and second region (22) outside the first region (21); a ceiling backing material (24) which supports the ceiling material (20); and a soft heat insulator (30) which is placed over the back side of the first region (21). The heat insulator (30) is pressed and crushed with the ceiling backing material (24) to be fixed.SELECTED DRAWING: Figure 1

Embodiments of the present invention provide a frost point hygrometer apparatus utilizing dry ice and ethanol, or liquid nitrogen, as cryogenic coolant. FPH apparatus in accordance with embodiments of the present invention includes a copper cold finger with a sink immersed in a liquid cryogen to provide cooling power throughout the profile, a polished mirror disk residing at the opposite end of the cold finger with ambient air passing over it, a nichrome heater wrapped around the narrow shaft of the continuous cold finger and mirror piece to provide heat to the mirror, an optical source and detector, including an infrared light-emitting diode and a photodiode, to monitor the mirror's reflectivity as condensate accumulates in the form of dew or frost, a biconvex lens to focus the light reflected from the mirror into the photodiode, and a calibrated thermistor embedded in the mirror to measure the frost point temperature.

The invention discloses an anti-condensation bubble type water level gauge which comprises a main machine body, a controller and an air pump are arranged in the main machine body, the air pump is electrically connected with the controller, an air inlet pipe is arranged on an air inlet of the air pump, and an air outlet pipe is arranged on an air outlet of the air pump. One end of the air inlet pipe penetrates through the main machine body and then extends out of the main machine body. According to the invention, the dew cleaning assembly is arranged, the vibration of the dew cleaning assembly can drive the pressure sensor to vibrate, and the vibration of the pressure sensor shakes off dew condensed on the surface, so that the surface of the pressure sensor can be kept clean, and the detection accuracy of the pressure sensor is improved; the filtering assembly filters and cleans the gas sucked by the air pump, so that the gas entering the outer pipe and the three-way pipe does not have dust particles, and the dust particles are prevented from being attached to the outer pipe and the three-way pipe to influence the detection accuracy of the gas conveying and the pressure sensor.

The present application belongs to the technical field of air conditioners. Disclosed are an anti-condensation control method, a device, an apparatus and a storage medium. The method comprises: in a cooling mode, acquiring a water supply temperature of a water chilling unit and a dew-point temperature of a space where a tail end heat exchange component is located; on the basis of the water supply temperature and the dew-point temperature, calculating a current temperature difference; on the basis of the current temperature difference and a temperature difference calculated at a previous control moment, determining a temperature difference change value; on the basis of the current temperature difference and the temperature difference change value, determining a target water temperature adjustment amount of the water chilling unit; and determining a target water temperature of the water chilling unit according to the target water temperature adjustment amount, and controlling the water chilling unit to operate according to the target water temperature.

The present invention relates to a dew condensation prevention device for pipelines, comprising: two clamping plates which are oppositely arranged and rotatably connected on one of the opposite sides, and by rotating the two clamping plates, an enclosing space for clamping a jacketed pipeline is formed; a protective layer attached to the inner walls of the two clamping plates, when the two clamping plates enclose to form the enclosing space, the two ends of the protective layer are attached to each other and enclosed in a ring shape, and the joint seam of the protective layer is staggered from the joint seam of the two clamping plates; a water receiving trough fixed below the clamping plate and corresponding to the end of the enclosing space; and a support frame with the bottom end fixed to the water receiving trough and the top end located above the clamping plate for connecting to the main structure above the pipeline. The present invention effectively solves the problem of dew condensation on the outer wall of the water supply and drainage pipeline, avoids the condensation of water dew on the outer wall of the pipeline through the dew condensation prevention device, prolongs the service life of the pipeline, ensures the normal operation of the water supply and drainage system, and the device has a simple structure, is easy to implement and has strong adaptability.

An air conditioner may include a heat exchanger temperature sensor, a compressor, at least one memory storing one or more instructions, and at least one processor, wherein the at least one processor is configured to execute the one or more instructions stored in the memory to calculate a dew point of a ceiling interior space where an indoor unit of the air conditioner is provided, obtain a surface temperature of the indoor unit based on a sensor value of the heat exchanger temperature sensor during operation of the air conditioner, and based on the obtained surface temperature of the indoor unit being lower than or equal to the dew point of the ceiling interior space, increase the surface temperature of the indoor unit by reducing a driving frequency of the compressor.

The invention provides a steel rail condensation prediction method and device based on time sequence data, equipment and a medium. The method comprises the steps that the rail surface temperature in a future time period is predicted according to rail surface parameters of a time sequence in a past time period; according to the trackside parameters of the time sequence in the past time period, the trackside temperature, the trackside humidity and the trackside wind speed in the future time period are predicted; on the basis of the predicted trackside temperature and the predicted trackside humidity, the dew-point temperature in the future time period is predicted in combination with the relation between the dew-point temperature and the trackside temperature and the relation between the dew-point temperature and the trackside humidity; and predicting rail surface condensation based on the predicted rail surface temperature, the predicted trackside wind speed and the predicted dew point temperature. According to the method provided by the invention, the rail surface condensation is predicted according to the rail surface parameters and the trackside parameters of the time sequence in the past time period in combination with the relationship between the dew point temperature and the trackside temperature and the relationship between the dew point temperature and the trackside humidity, so that the pre-judgment of the condensation of the steel rail is realized, a powerful guarantee is provided for the operation safety of rail traffic, and potential risks and losses caused by condensation are reduced.

The utility model discloses an air conditioner air supply outlet capable of effectively preventing moisture condensation, which relates to the technical field of air conditioning systems, and is characterized in that a foundation is formed by mounting plates which are symmetrically arranged left and right, and an adjustable air supply outlet is formed by a main adjusting plate, an auxiliary adjusting plate and a backflow plate which are rotationally connected between the mounting plates; meanwhile, an impeller, a front adjusting pipe, a middle adjusting pipe, a rear adjusting pipe and a heat conduction pipe are arranged, premixing and heat balanced distribution of air conditioner cold air and indoor return air are achieved, bimetallic adjusting pieces are automatically bent when the temperature is lower than a preset threshold value, the corresponding adjusting pipes are driven to be opened, premixed gas enters an air mixing cavity, the air supply temperature is effectively increased, and the air supply efficiency is improved. And an external driving system achieves accurate regulation and control over the area of an air supply outlet and the airflow speed through a driving gear and an adjusting gear, and therefore the air supply effect of the air conditioner and the indoor air quality are improved.

The invention discloses a control method and device of storage equipment and refrigeration equipment, and belongs to the field of refrigeration equipment. The control method of the storage equipment comprises the following steps: acquiring actual environment temperature and humidity information corresponding to the storage equipment; querying a target association table based on the actual environment temperature and humidity information, and obtaining a first duration matched with the actual environment temperature and humidity information; the target association table is used for representing a corresponding relation between the conduction duration of the anti-dew pipe and the actual environment temperature and humidity information; and after the bypass pipe is controlled to be closed and the dew-proof pipe is controlled to operate for the first duration, the dew-proof pipe is closed and the bypass pipe is controlled to operate. According to the control method of the storage equipment, the working time length of the anti-dew pipe can be dynamically adjusted based on the actual environment temperature and humidity, on the basis of ensuring no condensation, the heat load in the storage equipment is effectively reduced, the operation energy consumption of the energy storage equipment is reduced, and optimal heat management is favorably realized.