294 results about "Ventilation mode" patented technology

The invention discloses a coal mine ventilation optimization and air quality regulation and control method based on adaptive learning, and relates to the technical field of coal mine ventilation optimization, and the method comprises the following steps: arranging a plurality of sensors in a mine, carrying out the real-time collection and monitoring of key environment parameters, and uploading the collected data to a central control system; and comparing the collected real-time data with historical data, and dividing the collected real-time data into conventional working condition data and abnormal working condition data according to environment states. Through real-time monitoring of various sensors and a deep learning algorithm, accurate ventilation control is achieved, a problem area is rapidly positioned in an emergency, airflow is dynamically adjusted, and safety of miners is guaranteed. According to the system, an LSTM model is adopted to predict an event trend in advance, preventive regulation and control measures are taken in time, real-time adjustment is supported, and the strain capacity is improved. Through a multi-stage ventilation mode, the system optimizes energy consumption and equipment operation efficiency, reduces unnecessary energy waste and maintenance cost, and realizes balance between safety and economy.

The utility model relates to the technical field of sunlight rooms, in particular to a movable sunlight room. The movable sunlight room comprises a track and two sets of telescopic arch assemblies oppositely arranged at the two ends of the track. For any telescopic arch-shaped assembly, the telescopic arch-shaped assembly comprises a fixed arch-shaped unit and a movable arch-shaped unit, the fixed arch-shaped unit is fixedly arranged at the end of the track, and the movable arch-shaped unit is arranged outside the fixed arch-shaped unit in a sleeving mode and is in sliding connection with the track; the two movable arch units can slide oppositely along the track until the opposite ends of the two movable arch units abut against each other, and the other ends of the two movable arch units are connected with the corresponding fixed arch units in an adjacent mode respectively. A'side wall + top 'omnibearing ventilation mode can be provided, so that the permeability of the sunlight room is improved.

The invention provides an indoor air purification method, which comprises the following steps of: comparing and analyzing airflow organization characteristics and particulate matter distribution conditions under different ventilation strategies, evaluating the effectiveness of various ventilation modes for controlling infection risks in a hospital, and screening out a target ventilation system design scheme, so that the target ventilation system design scheme meets the requirements of hospital air quality standards; on the basis of the screened target ventilation system design scheme, the arrangement of an air supply outlet, the air speed and the temperature are further optimized, and a large vortex simulation technology is adopted to conduct refined simulation on the airflow turbulence characteristics of a local area so as to verify the stability and reliability of the ventilation effect; and comprehensively evaluating the influence of the optimized ventilation system design scheme on the overall energy consumption of the hospital, carrying out economic analysis, balancing the energy-saving benefit and the sensing control effect, finally determining an enforceable airflow organization optimization strategy and supporting measures, and providing a customized sensing control solution for the hospital.

The invention belongs to the technical field of curtain wall structures, and discloses a composite curtain wall structure suitable for a zero-carbon building, which comprises an inner side curtain wall and an outer side curtain wall. The inner side curtain wall is arranged on the building body and provided with a ventilation opening, an opening fan is arranged at the ventilation opening and can open or close the ventilation opening, the outer side curtain wall is connected to the inner side curtain wall, a ventilation cavity is formed between the outer side curtain wall and the inner side curtain wall, when the opening fan is opened, the ventilation cavity is communicated with the indoor space through the ventilation opening, and the outer side curtain wall is provided with an air inlet and an air outlet. The air inlet and the air outlet are both configured to be selectively opened or closed, and the ventilation cavity can communicate with the outside through the air inlet and the air outlet. By means of the arrangement, the composite curtain wall structure suitable for the zero-carbon building can flexibly adjust the ventilation mode, and energy consumption and carbon emission of the building can be reduced.

The invention belongs to the technical field of tunnel ventilation regulation and control, and particularly relates to a control method of a highway tunnel ventilation system based on wind speed. According to the invention, sensors are arranged at key positions of a tunnel, wind speed and environmental parameters are collected, and traffic flow detection is carried out by using video equipment and an SVM model. Then, a comprehensive evaluation function is defined according to the collected data to calculate ventilation requirements, and a ventilation mode is selected based on the ventilation requirements; thirdly, the opening degree of a ventilation opening and the speed of a draught fan are adjusted through a PID controller, so that the ventilation requirement is met. Finally, CFD software is used for simulating air flow, the ventilation opening layout and opening and closing time are optimized through a simulated annealing algorithm, and therefore ventilation efficiency optimization is achieved. In the whole process, accurate control and intelligent optimization of the tunnel ventilation system are achieved, the ventilation efficiency is improved, and the energy consumption is reduced.

An inner isolation breathable layer and an outer isolation breathable layer are fixedly connected to the inner side and the outer side of a middle elastic breathable layer of the high-breathability cushion fabric respectively and do not make direct contact with the buttocks and the back of the human body. Meanwhile, transverse ventilation holes which are transversely arranged in a ventilation mode are formed in the inner side space of the inner isolation ventilation layer and the outer isolation ventilation layer which are arranged at intervals, vertical ventilation holes corresponding to the transverse ventilation holes are evenly formed in the outer side surfaces of the inner isolation ventilation layer and the outer isolation ventilation layer respectively, and each vertical ventilation hole corresponds to the corresponding middle ventilation hole; vertical ventilation can be achieved through the transverse ventilation holes, ventilation can be achieved by isolating the ventilation layer from the inner layer through the middle ventilation holes, and the ventilation performance of the cushion fabric is greatly improved.

The invention provides a ventilation device for construction in a tunnel. The ventilation device comprises an air supply barrel, an air inlet barrel is rotationally arranged in one end of the air supply barrel, an air inlet valve is arranged at the end, away from the air supply barrel, of the air inlet barrel, the outer side of the air supply barrel is sleeved with a dehumidification box, and the air inlet barrel can be communicated with or disconnected from the dehumidification box; air inlet windows are arranged on the two sides of the dehumidification box. An evaporation assembly and a condenser are sequentially arranged in the dehumidification box and correspond to the air inlet windows. The evaporation assembly is provided with a supporting frame corresponding to the air inlet window, and dehumidification plates are evenly arranged in the supporting frame. A water removal mechanism for removing condensate water on the side surface of the dehumidification plate is arranged on the outer side of the dehumidification plate in a sliding manner; according to the ventilation device for construction in the tunnel, connection or disconnection of the air inlet barrel and the interior of the dehumidification box can be switched according to needs, so that the ventilation device has two ventilation modes of direct air supply and dehumidification air supply, the ventilation requirements under different external air conditions in non-tunnel construction are met, and the humidity in the tunnel is reduced.

The disclosure provides a method of operating a (HVAC) system. The method includes measuring a concentration of a gas in the target space, and determining that the concentration exceeds a gas concentration threshold. The method includes determining that operation of the HVAC system in a ventilation mode is indicated to reduce the concentration of the gas. The method includes determining a total capacity of the HVAC system, and determining a current capacity of the HVAC system. The method includes causing the HVAC system to operate in the ventilation mode after validating that the total capacity is greater than the current capacity during operation of the HVAC system in the ventilation mode.

The invention discloses an urban traffic tunnel and civil air defense system. The system comprises a traffic tunnel; the tunnel entrance is provided with a cleaning type air exhaust protection air-tight door and an air inlet and outlet closing door so that normal passage of the traffic tunnel can be ensured when the air-tight door is opened, a protection space is formed in the traffic tunnel when the air-tight door is closed before war, and meanwhile the cleaning type air exhaust protection air-tight door can be switched into a cleaning type ventilation mode or an isolation type protection mode. The traffic tunnel is provided with a temporary personnel masking area and a temporary material masking area; the pedestrian transverse cave and the vehicle transverse cave are each provided with a two-way stress protection air-tight door, normal passing is ensured when the two-way stress protection air-tight door is opened, and temporary personnel and materials are sheltered when the two-way stress protection air-tight doors are closed. Water pipes, cables and communication pipelines are reserved in the tunnel portal of the traffic tunnel, the pedestrian transverse hole and the vehicle transverse hole in advance. By means of the arrangement, the blank that domestic underground traffic tunnels give consideration to the field of civil air defense is filled, construction of underground traffic tunnel facilities gives consideration to the civil air defense requirement, and the urban comprehensive protection capacity is effectively improved.

The invention relates to the technical field of tunnel ventilation, and discloses an internal combustion engine traction single inclined shaft railway tunnel ventilation mode determination method which comprises the steps that the piston wind speed when a train passes through a tunnel is calculated according to tunnel structure parameters and train operation parameters; determining the tail end position of the pollutant according to the piston wind speed; environment parameters are calculated according to the tunnel structure parameters, the train operation parameters and the pollutant tail end positions; dividing into three working conditions according to the position relation between the pollutant tail end position and the inclined shaft position, and matching corresponding ventilation mode combinations; for each ventilation mode in the ventilation mode combination, the total energy consumption of the system is calculated in combination with the piston wind speed and the environmental parameters; and selecting the ventilation mode with the minimum total energy consumption in the ventilation mode combination as a final scheme under the target working condition according to a comparison result of the total energy consumption of the system. According to the method, the appropriate ventilation mode can be accurately selected on the premise that pollutants are discharged in time, the ventilation energy consumption is reduced, and a calculation basis is provided for tunnel inclined shaft type ventilation.

The invention discloses a temperature control lifting and rotating self-adaptive movable house, belongs to the technical field of constructional engineering, and aims at solving the problems that an existing temporary building is insufficient in thermal environment regulation and control, weak in self-adaptive capacity, high in energy consumption and the like. The box house comprises a house body, a paraffin-based thermal expansion driving system, an outer wall thermal bimetal shutter curtain wall system, an intelligent control system and a solar photovoltaic and ventilation integrated system. Wherein the paraffin-based thermal expansion driver can adjust the distance between a house and the ground, the thermal bimetal shutter curtain wall can dynamically shade and ventilate, the intelligent control system monitors parameters such as temperature gradient and heat exchange temperature difference, all the systems are linked to achieve automatic switching between a winter heat preservation mode and a summer ventilation mode, and the solar photovoltaic and ventilation system improves the energy utilization efficiency. Through cooperation of multiple systems, the box room can adapt to environment temperature changes, maintain the indoor comfortable temperature, reduce energy consumption and enhance the environment adaptability and structural stability of a temporary building, and is suitable for construction sites, disaster rescue and other scenes.

The invention relates to the technical field of medical equipment, in particular to a sleep breathing control method, device, system, equipment and medium, and aims to obtain sleep-related data of a monitored object in a sleep period, judge whether the monitored object needs breathing control or not according to the sleep-related data, and control breathing of the monitored object if the monitored object needs breathing control. If yes, mode setting information of the breathing control system is determined, the mode setting information is used for indicating working modes of the breathing control system, the working modes comprise a CPAP ventilation mode, a BiPAP-T ventilation mode and an Auto BiPAP ventilation mode, and corresponding different control strategies are adopted for the monitored object according to the mode setting information of the breathing control system. It can be seen that according to the sleep related data, whether the monitored object needs to be subjected to breathing control or not is determined, and when the monitored object needs to be subjected to breathing control, accurate sleep breathing control can be conducted on the monitored object according to the mode setting information of the breathing control system, so that the treatment effect becomes better.

The invention discloses a laboratory ventilation system and method, and relates to the field of ventilation management.The system comprises a daily ventilation module, an abnormal ventilation module and a filtering processing module, and the daily ventilation module is responsible for collecting laboratory environment information and analyzing the laboratory environment information based on an environment risk model; and the abnormal ventilation module is responsible for collecting laboratory air information and carrying out analysis based on a ventilation risk model so as to judge whether a ventilation mode of the laboratory needs to be replaced or not, and if the ventilation mode needs to be replaced, the system can collect pollution position information and analyze the pollution position information so as to obtain an abnormal ventilation scheme. The filtering processing module collects abnormal ventilation data according to the abnormal ventilation scheme, analyzes the abnormal ventilation data and finally gives an early warning according to an analysis result, the ventilation efficiency is improved, the safety of a laboratory is enhanced, and the ventilation cost is reduced.

The invention discloses a blowing and sucking integrated fan which comprises a connecting shell, fan assemblies are fixedly connected to the upper end face and the lower end face of the connecting shell correspondingly, the fan assembly located at the lower end of the connecting shell is the first fan assembly, and the fan assembly located at the upper end of the connecting shell is the second fan assembly. An airflow channel is formed in the middle of the connecting shell and located between the first fan assembly and the second fan assembly, and the first fan assembly is used for guiding airflow to be sucked in from the circumferential direction of the second fan and exhausted from the circumferential direction of the first fan through the airflow channel in the middle of the connecting shell; the second fan assembly is used for guiding airflow to be sucked in from the circumferential direction of the first fan and exhausted from the circumferential direction of the second fan through the airflow channel connected with the middle of the shell. According to the blowing and sucking integrated fan, the two ventilation modes of air suction and air blowing can be provided at the same time, a driver and passengers can flexibly select a comfortable ventilation mode according to personal preference, and the sitting comfort can be greatly improved.

The invention provides an indoor environment adjusting method, device and equipment based on a gymnasium tent and a medium. The indoor environment adjusting method comprises the steps that an acquisition module acquires illumination intensity information, a first indoor temperature value, an outdoor temperature value and indoor humidity information of the gymnasium tent; the control module determines an illumination angle between sunlight and the tent of the gymnasium according to the illumination intensity information, and the light adjusting module performs first angle adjustment on the light transmitting module according to the illumination angle; a temperature adjusting parameter is calculated according to the first indoor temperature value and the outdoor temperature value, and the light adjusting module conducts second angle adjustment on the light transmitting module according to the temperature adjusting parameter; and a humidity adjusting signal is generated according to the indoor humidity information and the first indoor temperature obtained after second angle adjustment, and the control module controls the light adjusting module to adjust the light transmitting module to the ventilation mode according to the humidity adjusting signal till the gymnasium tent reaches the second indoor temperature. According to the technical scheme of the embodiment, the bad environment condition in the tent of the gymnasium can be effectively avoided.

The invention discloses a multi-mode emergency ventilation system for dangerous areas of ships and maritime work platforms, which comprises an electric power system, a fan ventilation module and an intelligent control unit provided with an emergency control system in advance, the compressed air driving module, the mechanical spring energy storage driving module, the natural wind power utilization module and the hot pressure difference ventilation module do not need to be powered by an electric power system and are electrically connected with the intelligent control unit, and the intelligent control unit monitors the operation conditions of the electric power system and the fan ventilation module and the temperature, gas and air pressure conditions in a dangerous area; when the power system or the fan ventilation module breaks down, the intelligent control unit switches the emergency control system and controls the four non-power control modules to be started and stopped for non-power-driven physical ventilation. Compressed air driving, mechanical spring energy storage driving, natural wind power utilization and a hot pressure difference effect are combined, a proper mode is automatically switched under the emergency condition through multiple power-free ventilation modes, and air circulation in a cabin is continuously kept.

The invention discloses a long and large tunnel fire situation real-time prediction method based on image recognition and physical information fusion, and the method comprises the steps: 1, building a large and large gradient tunnel fire simulation device in a complex ventilation mode, and constructing a large and large gradient tunnel fire data set; 2, constructing a big gradient tunnel fire parameter prediction network based on a Vision Transform architecture; and 3, constructing a total loss function of the large gradient tunnel fire parameter prediction network and performing training so as to obtain an optimal fire parameter prediction model which is used for predicting the large gradient tunnel fire image and physical information to obtain large gradient tunnel fire parameters. According to the invention, dynamic simulation of a large gradient tunnel fire in a complex ventilation mode can be realized; and according to the flame image and the physical information, predicting the heat release rate of the fire hazard of the large gradient tunnel with different gradients / pressures / fuels / heights / positions and the temperature and heat flow distribution at different positions below the ceiling in real time under the coupling action of the complex ventilation mode in the construction operation and maintenance stage.

The utility model discloses a constant-temperature control system for a battery compartment of a new energy ship. The constant-temperature control system comprises heating and refrigerating equipment, a main control unit and a temperature sensor which are arranged in a constant-temperature compartment, the temperature sensor is used for collecting temperature data of a battery in the battery compartment, the output end of the temperature sensor is connected to the main control unit, and the output end of the main control unit is connected with the heating and refrigerating equipment and used for controlling the refrigerating and heating working states of the heating and refrigerating equipment; the control system further comprises a ventilation system, the ventilation system is connected with the main control unit, and the ventilation system is used for achieving circulating flow between air in the battery bin and air outside the ship according to control signals of the main control unit. According to the scheme, when constant temperature control is carried out on the ship battery compartment, heat dissipation is carried out in a ventilation mode when the temperature is high, environment wind interacts with the interior of the battery compartment, heat is taken away, the working time of refrigeration equipment is shortened, energy consumption of an electric ship is reduced, and therefore the endurance is improved to a certain degree.

The present invention relates to the field of building ventilation structure, and in particular to an energy-saving ventilation structure for building design. It includes an air inlet tube, a connecting tube, an air outlet tube, an air inlet adjustment component, an air outlet adjustment component, a filter plate 1, a filter plate 2, an air inlet component, a control box, a mounting frame, a solar panel and a power storage device; the air inlet tube and the air outlet tube are respectively connected to the two ends of the connecting tube; the air inlet adjustment component is arranged on the air inlet tube; the air outlet adjustment component is arranged on the air outlet tube; the filter plate 1 and the filter plate 2 are arranged on the connecting tube; the air inlet component is arranged between the filter plate 1 and the filter plate 2; the mounting frame is arranged on the air inlet tube; and the solar panel is arranged on the mounting frame. The present invention has various ventilation modes, and an air inlet component is arranged to achieve the purpose of synchronous air intake and cleaning, and realize efficient ventilation, energy saving and environmental protection. An air inlet adjustment component is arranged to control the air intake volume to meet different air intake requirements. An air outlet adjustment component is arranged to control the air outlet angle to meet different air outlet requirements.

The invention provides an object surface microstructure and bubble composite resistance reduction measurement experimental device based on Taylor-Couette flow, and relates to the technical field of Taylor-Couette flow resistance reduction measurement. Comprising a rack supporting column, a rack supporting plate, a motor, an upper coupler, a torque sensor, an inner driving shaft, a lower coupler, a mechanical seal, an upper end sealing connecting piece, an inner rotor, an outer rotor, a lower end sealing connecting piece, a supporting column, a rack base, a one-way vent valve and a chassis. According to the invention, convenient replacement of different inner rotors with surface microstructures, smooth surfaces and the like can be realized according to experimental requirements; the switching between two ventilation modes of outward ventilation inside the inner rotor and vertical upward ventilation at the bottom of the inner rotor can be realized; flow control under different rotating speeds and gas flows can be realized through the gas flow meter and the motor controller; resistance borne by the inner rotor under different flow working conditions can be measured in real time through the torque sensor, and therefore research on the surface microstructure and bubble composite resistance reduction characteristic under Taylor-Couette flow is achieved.

The invention discloses a novel mixed ventilation method for tunnel hydrogen energy fire accident safety rescue. The novel mixed ventilation method comprises the steps that a multi-shaft tunnel model with a mixed ventilation system is established; a novel mixed ventilation mode is provided based on the advantages and disadvantages of the existing ventilation mode; comparing the influence of different novel mixed ventilation modes on the length of the hydrogen jet fire back layer and the temperature in the tunnel; the invention provides a novel mixed ventilation method with a speed prediction model for tunnel hydrogen energy fire accidents. According to the method, a novel mixed ventilation mode suitable for handling hydrogen energy fire accidents in the tunnel is provided on the basis of different ventilation mode-ventilation speed-temperature distribution conditions, a dimensionless prediction model of the critical longitudinal ventilation speed is established, and the danger of hydrogen jet fire in the tunnel is reduced; rapid selection of the ventilation mode and rapid prediction of the ventilation speed when the hydrogen jet fire occurs in the tunnel are achieved, and the method makes up for the limitation of a traditional single ventilation mode on hydrogen energy fire prevention and control.

The invention belongs to the field of pet cabins, particularly relates to an intelligent pet cabin, and aims to solve the problems that an existing cabin depends on a passive ventilation mode of a ventilation window, heat dissipation in the cabin only depends on the ventilation window in summer, the greenhouse effect is easily formed, the temperature is rapidly increased due to air retention, heatstroke, dehydration and even heat failure of pets are possibly caused, and cold air directly intrudes through the ventilation window in winter. In order to solve the problems that the temperature in a cabin is suddenly lowered, and small pets (such as puppies and short-hair cats) are prone to have a temperature loss symptom or immunity decline, the following scheme is provided that the fresh air system comprises a base and a fresh air system, an aluminum alloy frame is fixedly arranged at the top of the base, and tempered glass convenient to penetrate through the interior is fixedly arranged on the four sides of the aluminum alloy frame; one piece of tempered glass is provided with a door body convenient for pets to get in and out, the interior of the cabin is cooled in summer through the fresh air system, the interior of the cabin is heated in winter, the comfortable environment of the pets is improved, and the possibility that the pets get sick is reduced.

Described is an artificial lung ventilation device (ALV) parameter monitoring and control system including more than one ALV, a server, a remote ALV parameter monitoring and control device, and a two-way voice communication module. Each ALV has a patient identification device. The server has a layout scheme of the ALVs in the premises. The telemedicine system identifies each patient and ALV. Ventilation modes, ALV parameters, alarms, available ventilation mode and at least one ALV parameter can be monitored and changed remotely. The server with ALV and ALV parameter monitoring and control device can be connected via physical connections, wireless communication or mobile Internet. The ALV has an integrated or stand-alone IoT unit—in this case the communication in the system can be easily changed, e.g. from 4G to 5G. Also described is a telemedicine method for monitoring and controlling ventilation modes, alarms and parameters of more than one ALV.

The invention belongs to the technical field of intelligent control of air conditioners, and relates to an intelligent regulation and control method and system for hotel air conditioners, and the method comprises the following steps: generating a check-in judgment basic data set; generating a real check-in activation instruction or skipping to a check-out blocking action; an energy-saving standby instruction is generated to control the air conditioner to be switched to a low-power ventilation mode, and a home leaving state mark is output; when a power-taking groove power-off signal is detected and a foreground settlement completion confirmation signal is received, the refrigeration and heating functions of a guest room air conditioner host are closed, and a periodic ventilation mode is entered to generate an empty room energy-saving mark; the surplus cooling capacity is transferred to a high-temperature demand room on the same floor, and meanwhile, an electric charge deduction value corresponding to the idle target room is generated; according to the electric charge deduction value, a hotel settlement system is linked to issue an electric charge deduction voucher, air valve opening adjustment is executed based on the surplus cold energy resource mark, and an air valve automatic distribution action is formed; and outputting the pre-starting regulation and control package to the target air conditioner host. The problem that cold and hot resources in floors cannot be compensated interactively is solved.

The invention discloses an electric turbine anaesthesia machine with an automatic air supply function of an air storage bag and a method, and the anaesthesia machine comprises a turbine which is used as an active inspiration air source; a detachable air storage bag; an air supply one-way valve; the breathing circuit is connected between the turbine outlet and the patient end and comprises an inspiration branch provided with a flow diaphragm, an expiration branch provided with an expiration EV valve and an expiration flow diaphragm, and a patient breathing circuit tank assembly containing the air storage bag and the soda lime tank; a plurality of sensors; the control unit is electrically connected with and controls the turbine and the expiration EV valve, receives signals of the sensor and is used for achieving different breathing ventilation modes. According to the anesthesia machine and method, turbine driving is adopted, the tidal volume adjusting range is wide, and physical limitation of a folding bag is avoided; the air storage bag is externally arranged and replaceable, so that cleaning and maintenance are facilitated; a one-way valve automatic gas supply mechanism ensures continuous and stable gas supply; the device supports various breathing modes, and is suitable for various scenes such as anesthesia maintenance, postoperative awakening, oxygen therapy and the like.

This image is primarily an operational image for heat exchange type ventilation fans, used for switching ventilation modes and setting dehumidification / humidification. Specifically, the display within the hexagon and the arrow-shaped figure outside the hexagon change according to the ventilation mode, and the ventilation mode can be switched by operating the control panel at the bottom of the image.

The invention discloses an air supply device of a tunnel construction guarantee cabin, and relates to the technical field of guarantee cabin devices for tunnel construction, the left end and the right end of a machine shell are provided with openings, an air blowing mechanism is arranged in the machine shell, a driving mechanism is arranged in the machine shell, and the driving mechanism and the air blowing mechanism are arranged in a transmission mode; through the fan structure capable of adjusting the inclination direction of the fan blades, and meanwhile, the fan blades are provided with driving structures in various modes, so that different ventilation modes are selected according to different ventilation conditions and ventilation environments during use, and air supply and air exchange of the interior of the security cabin can be achieved under most conditions.

This invention provides a ventilation device for tunnel construction, including an air supply duct, an air inlet duct rotatably mounted inside one end of the air supply duct, an air inlet valve mounted on the end of the air inlet duct opposite to the air supply duct, and a dehumidification box fitted on the outside of the air supply duct. The air inlet duct can be connected to or disconnected from the dehumidification box. Air inlets are provided on both sides of the dehumidification box, and an evaporation assembly and a condenser are sequentially arranged inside the dehumidification box corresponding to the air inlets. The evaporation assembly has a support frame corresponding to the air inlets, and dehumidification plates are evenly arranged inside the support frame. A desiccant mechanism for removing condensate from the sides of the dehumidification plates is slidably mounted on their outer side. The tunnel construction ventilation device of this invention can switch the connection or disconnection between the air inlet duct and the dehumidification box as needed, enabling the device to have both direct air supply and dehumidification air supply ventilation modes, meeting the ventilation needs under different external air conditions during tunnel construction and reducing the humidity inside the tunnel.

This invention provides a processing system, comprising: a first temperature regulating component, which, when the processing system is in dehumidification mode, cools and dehumidifies the fresh air passing through it to form low-humidity fresh air; and, when the processing system is in ventilation mode, heats the low-humidity fresh air. A first heating component is used to heat the low-humidity fresh air flowing out of the first temperature regulating component. A component to be dried is disposed within the ventilation area of ​​the drying unit, and the low-humidity fresh air flowing out of the first heating component passes through the ventilation area of ​​the drying unit to form exhaust air. A first solution heat exchanger is connected to the ventilation area to allow heat exchange between the heat exchange liquid and the exhaust air flowing out of the ventilation area, thereby exchanging heat with the low-temperature liquid to form a high-temperature liquid. The high-temperature liquid is used to enter a heating channel to heat and dry the component to be dried. This invention solves the problem of high energy consumption in gelatin drying in the prior art.

The disclosure provides a method of operating a (HVAC) system. The method includes measuring a concentration of a gas in the target space, and determining that the concentration exceeds a gas concentration threshold. The method includes determining that operation of the HVAC system in a ventilation mode is indicated to reduce the concentration of the gas. The method includes determining a total capacity of the HVAC system, and determining a current capacity of the HVAC system. The method includes causing the HVAC system to operate in the ventilation mode after validating that the total capacity is greater than the current capacity during operation of the HVAC system in the ventilation mode.