An air intervention agent concentration control system and method for dynamic manned environments

Abstract

The application discloses a kind of air intervention agent concentration control systems and methods for dynamic manned environment.The system includes: perception unit, for obtaining the air supply amount Q of target space and the number of indoor personnel N in real time;Medicament volatilization module is set in air supply duct, for releasing air intervention agent to air supply airflow with controllable volatilization rate G;And intelligent controller.The application adopts feedforward control strategy, calculates and compensates the influence of environmental disturbance source on concentration in advance by monitoring environmental disturbance source in real time, and discards the traditional way of lag feedback on indoor concentration.The scheme can realize accurate, continuous and stable control of air intervention agent concentration in dynamic, manned indoor environment, and solve the technical problem that traditional method cannot be self-adaptively adjusted, resulting in large concentration fluctuation.

Description

Technical Field

[0001] This invention relates to the field of building environment control technology, and in particular to an air intervention agent concentration control system and method for dynamic occupied environments. Background Technology

[0002] In various dynamic indoor environments with human activity, such as offices, schools, and vehicles, especially in medical settings with stringent air quality requirements, precisely and continuously controlling the concentration of specific components in the air (such as disinfectants, aromatic molecules, and allergen neutralizers) is a significant technical challenge. Traditional air intervention methods, such as timed spraying, passive evaporation, or simple heating, generally suffer from uncontrollable release rates and drastic concentration fluctuations. These methods cannot adapt to dynamic environmental changes (such as increases or decreases in ventilation volume and personnel entry and exit), resulting in insufficient concentration and ineffective intervention when needed, or excessively high concentration when not needed, causing waste or even irritation to the human body. Particularly in the field of infection control, intermittent disinfection methods lead to gaps in the effectiveness of continuous protection. Therefore, a long-standing unresolved technical problem in this field is the lack of a method that can continuously and precisely release an air intervention agent at a constant and controllable concentration in complex, dynamically changing environments with continuous human presence, and achieve intelligent linkage with the building ventilation system to achieve efficient, safe, and energy-saving proactive environmental intervention goals. Summary of the Invention

[0003] In a first aspect, this application provides an air interferon concentration control system for dynamic occupied environments, comprising: a sensing unit configured to acquire the air supply volume of a target space in real time. and the real-time number of people in the target space A drug evaporation module, disposed within an air supply duct connecting to the target space, is configured to evaporate at a controllable rate based on an evaporation rate control signal. The system releases an air intervention agent into the airflow within the air supply duct; and an intelligent controller, which establishes a communication connection with the sensing unit and the agent volatilization module, the intelligent controller being configured to: based on a preset target concentration A preset per capita consumption coefficient The real-time acquired air volume and the real-time number of people Execute a core control law The evaporation rate is calculated. ; and the generation of the evaporation rate The corresponding evaporation rate control signal is sent to the drug evaporation module to control the working state of the drug evaporation module.

[0004] Optionally, the drug evaporation module includes: a replaceable modular drug cartridge containing the air intervention agent; a positive temperature coefficient constant temperature heating unit thermally connected to the drug cartridge for constant temperature heating of the drug cartridge; a temperature sensor configured to monitor the temperature of the drug cartridge; and a forced diffusion fan configured to blow drug molecules evaporating from the drug cartridge into the airflow.

[0005] Optionally, the intelligent controller is further configured to: receive the real-time temperature of the medicine cartridge from the temperature sensor; and perform closed-loop temperature control on the positive temperature coefficient constant temperature heating unit based on the real-time temperature and a preset target evaporation temperature.

[0006] Optionally, the intelligent controller pre-stores evaporation rate control signal-evaporation rate mapping relationship data obtained through calibration experiments in its memory. Specifically, the intelligent controller is configured to: based on the calculated evaporation rate... The evaporation rate control signal is determined by querying the evaporation rate control signal-evaporation rate mapping data.

[0007] Optionally, the evaporation rate control signal is a pulse width modulation signal, and the evaporation rate control signal-evaporation rate mapping data is a PWM duty cycle and evaporation rate. Functional relationships or lookup tables.

[0008] Optionally, the sensing unit includes: an interface for communicating with a building automation system, through which the intelligent controller obtains the air volume provided by the building automation system. ; and a millimeter-wave radar personnel counter, which is installed at the entrance of the target space to obtain the real-time number of personnel without being noticed. .

[0009] Optionally, the modular medicine cartridge is equipped with an RFID tag, and the smart controller identifies the type and batch of the medicine cartridge through the RFID tag, and records its installation time and cumulative usage.

[0010] Secondly, this application provides a method for controlling the concentration of air interfering agents in dynamic occupied environments, comprising the following steps: real-time acquisition of the air supply volume of a target space. and the real-time number of people in the target space Based on a preset target concentration A preset per capita consumption coefficient The real-time acquired air volume and the real-time number of people Execute a core control law To calculate the required evaporation rate of a drug. ; and within an air supply duct connecting to the target space, controlling a reagent evaporation module at the evaporation rate An air intervention agent is released into the airflow within the air supply duct.

[0011] Optionally, the step of controlling the drug volatilization module includes: based on the calculated volatilization rate The system queries a pre-stored evaporation rate control signal-evaporation rate mapping relationship data to determine a corresponding evaporation rate control signal; and outputs the evaporation rate control signal to the drug evaporation module.

[0012] Optionally, it further includes: continuously monitoring the temperature of the previous drug cartridge during the operation of the drug evaporation module; and performing closed-loop temperature control on the heating process of the drug cartridge based on the monitored real-time temperature and a preset target evaporation temperature to maintain a constant temperature of the drug cartridge.

[0013] The beneficial effects of this application are as follows:

[0014] By continuously and precisely releasing air intervening agents at the required concentration in occupied environments, the window of effect caused by traditional intermittent intervention methods (such as timed spraying and disinfection) is eliminated, thereby improving the environmental quality and safety of the target space.

[0015] By introducing a feedforward control strategy based on a dynamic mass balance model, disturbances caused by air conditioning, opening and closing of doors and windows, and movement of people can be actively overcome, and the concentration of effective components in the space can be stably maintained within the preset effective concentration range, ensuring the reliability and consistency of the intervention effect.

[0016] This system serves as an intelligent execution terminal within a building automation system (BMS). Through data exchange and coordinated control, it enables on-demand allocation and precise drug delivery, avoiding waste of energy and chemicals, and becoming an integral part of the intelligent building environmental control system.

[0017] By monitoring and recording data throughout the entire process of intervention agent release, a reliable technical foundation is provided for any application scenario that requires precise concentration control (such as infection control, space fragrance, allergen control, etc.), and the long-standing technical challenge of maintaining a constant concentration in dynamic human environments is solved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a system overall architecture and workflow diagram provided by an embodiment of the present invention;

[0020] Figure 2 This is a comparison diagram of the principles of model feedforward control and traditional feedback control used in the embodiments of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the drug volatilization module in an embodiment of the present invention;

[0022] Figure 4 This is an example curve diagram of the precise calibration relationship of G-PWM in an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] To illustrate the technical solution of the present invention in detail, the following will use a medical environment (such as a dental clinic) with high requirements for air quality as an exemplary application scenario. However, those skilled in the art should understand that the application of the present invention is not limited to this and can be extended to any dynamic human environment that requires precise control of the concentration of specific substances in the air, such as offices, clean rooms, museums, and high-end hotel lobbies.

[0026] This embodiment provides an air interferon concentration control system for dynamic occupied environments. The system is configured for deep integration into a building's heating, ventilation, and air conditioning (HVAC) system. It employs a hardware and software architecture comprising a sensing layer, a decision-making layer, and an execution layer to achieve a feedforward control closed loop. The system uses a control law based on a dynamic mass balance model and couples it with a physically quantifiable agent volatilization module to dynamically compensate for air interferon concentration in the supply airflow in response to environmental disturbances (specifically changes in ventilation volume and the number of people), thereby maintaining the agent concentration in the target space at a preset constant level.

[0027] In one specific embodiment, the core physical components of the system include: a chemical evaporation module installed inside the air supply duct of the target space; a millimeter-wave radar personnel counter installed above the entrance to the target space; and an embedded intelligent controller, equipped with an ARM Cortex-M series processor, serving as the control core. The intelligent controller establishes a communication link with the building automation system (BMS) server via an onboard Ethernet physical layer (PHY) chip using the Modbus TCP protocol, and obtains real-time air volume data of the variable air volume air conditioning box (VAV Box) in the target space through polling.

[0028] S100: Real-time acquisition of air volume in a target space and the real-time number of people in the target space .

[0029] In one specific embodiment of the present invention, this step is performed by the sensing unit of the system. The architecture of the sensing unit is designed as a distributed data acquisition front-end, whose function is to provide real-time and accurate environmental disturbance parameter vectors to the core control law of the decision-making layer. The sensing unit consists of an air volume sensing subsystem and a personnel quantity sensing subsystem.

[0030] air volume The acquisition of this information is achieved through the communication interface between the intelligent controller and the building management system (BMS). In modern intelligent buildings, variable air volume (VAV) systems are a standard configuration for maintaining indoor environmental parameters and optimizing energy consumption, which means the amount of air delivered to the target space... It is a variable that dynamically adjusts with the indoor load. This is due to the air supply volume. The dilution rate of the indoor chemical concentration is the dominant factor determining the instantaneous air volume, and accurate acquisition of its real-time value is the cornerstone of the feedforward control model. The intelligent controller integrates a complete Modbus TCP client protocol stack in its firmware and is pre-configured with the IP address of the target BMS server and a specific register address corresponding to the VAV terminal airflow data of the target space. In response to an interrupt triggered by an internal timer at a frequency of 1Hz, the controller initiates a read request to this BMS register address to obtain a value representing the instantaneous airflow (unit: The value is a floating-point number. After obtaining this raw value, the controller's internal arithmetic unit immediately performs a unit conversion operation to convert it to the International System of Units (SI). This allows for the invocation of core control laws. This integration method utilizes the existing intelligent infrastructure of the building, avoiding the complexity of installation, calibration, and long-term maintenance associated with adding independent wind speed sensors inside the duct.

[0031] For example, in timestamp The controller reads the raw air volume register value of 5400.0 from address 0x400A of the BMS server via the TCP / IP network. The floating-point unit inside the controller performs a division operation. Generate a value of 90.0 The processed air volume variable is stored in a specific address in RAM, awaiting retrieval in the next control cycle. If in At a certain moment, the BMS adjusts the damper opening in response to changes in indoor temperature, causing the register value to update to 6000.0. In the next polling cycle, the controller will obtain the new value and generate the updated processing variables. This ensures sub-second tracking of ventilation dilution disturbances.

[0032] Number of personnel The data is obtained through a millimeter-wave radar personnel counter deployed above the entrance frame of the target space. Personnel, as a dynamic disturbance source, contribute significantly to the consumption of airborne interferon through their physiological activities (respiration, skin contact) and other interactions. Therefore, real-time personnel numbers... It is a consumption term in the compensation model. The core input of this embodiment is millimeter-wave radar technology, operating in the 24GHz or 77GHz frequency band. It detects the distance, speed, and angle of targets by transmitting frequency-modulated continuous wave (FMCW) and analyzing the echo signals, thereby identifying and tracking human targets. The core advantage of this technology lies in its non-invasiveness; it does not collect any personally identifiable image information, thus meeting the privacy protection requirements of various venues. Furthermore, its detection performance is unaffected by environmental factors such as light, shadow, and temperature changes, providing highly robust counting. The radar counter's internal digital signal processor (DSP) runs a complex algorithm that distinguishes between entry and exit directions and maintains an internal counter representing the net number of people indoors. This counter maps its internal counter value to a holding register that can be read by an external host via the RS485 physical layer and the Modbus RTU slave protocol. The intelligent controller, acting as a Modbus RTU master, polls this radar slave at a high frequency to obtain the number of people in real time. .

[0033] For example, initially the target space is empty, and the radar's internal counter value is 0. At any given moment, a person enters, and the radar's signal processing algorithm identifies a motion vector moving towards the interior, triggering an internal counter to increment to 1. In subsequent polling cycles, the intelligent controller reads the value 1 from the radar's Modbus address and updates its internal variables accordingly. .exist At that moment, another person entered, the radar detected the entry event again, the internal counter updated to 2, and the controller then acquired the information. If in At any given moment, if someone lingers at the entrance but doesn't fully enter, the radar algorithm, based on their movement trajectory, will not trigger an incorrect count. Ultimately, the controller will only register when two people are consistently present within the target space. The value will stabilize at 2, which is the same as the value obtained at the same time. The values ​​together constitute a complete perturbation state vector. It is ready to be input into the decision-making core.

[0034] S200: Based on a preset target concentration A preset per capita consumption coefficient The real-time acquired air volume and the real-time number of people Execute a core control law To calculate the required evaporation rate of a drug. .

[0035] This step is the core of the system's decision-making process, executed via firmware code in the processor of the intelligent controller. The theoretical basis for this step stems from abstracting the target space as a continuous stirred tank reactor (CSTR) model that follows the law of conservation of mass. This model establishes the concentration of indoor air intervention agents. ( The rate of change over time () Mathematical relationship between the rates of entry, exit, and consumption: ,in Net room volume ( ). Drug influx Introduced by supply air, equal to supply air volume ( ) and supply air concentration ( The product of ) . Drug outflow flux Exhausted by ventilation, equal to the supply air volume Compared with the current indoor concentration The product of the two. Drug consumption flux. ( ) was modeled as being related to the number of people indoors Positively correlated items .

[0036] The control objective of this invention is to achieve dynamic equilibrium, that is, to maintain the indoor concentration. Constant at the target value ,at this time Substituting this steady-state condition into the model equations, we obtain... To achieve this balance, the system must generate a certain supply air concentration. for: This equation reveals the essence of maintaining constant concentration: the supply air concentration must be dynamically adjusted to compensate for consumption in real time. denominator of the dilution term .

[0037] This invention will integrate consumption items Modeling as ,in ( This is the per capita consumption coefficient scientifically calibrated through environmental chamber experiments. Substituting it into the equation yields... .

[0038] On the other hand, air supply concentration It is the drug evaporation module that controls the evaporation rate ( ) airflow The gas stream is produced by adding a drug, therefore .

[0039] These two The expression, i.e. Through algebraic transformation (multiplying both sides by ), ), thus deriving the core control law of this invention: .

[0040] The advantage of this control law is that it transforms the control problem from a state variable that is difficult to measure online. This is converted into a directly controllable actuator output. And calculate All required input parameters ( All of these are known or can be sensed in real time. Among them, and As system-level parameters, they are calibrated experimentally before deployment and burned into the controller's non-volatile memory as constants.

[0041] For example, when the air intervention agent is an antibacterial agent, the system parameters are pre-calibrated and set as follows:

[0042] Target concentration This value, determined based on in vitro microbiological experiments (e.g., agar diffusion method), represents the lowest effective concentration (MIC) capable of producing a significant inhibition zone against the target pathogen (e.g., Staphylococcus aureus ATCC 6538).

[0043] per capita consumption coefficient This value is achieved by deploying the system in a sealed environment chamber of known volume, and separately in... Records are kept under different number of conditions to maintain Required stable evaporation rate Then fit using linear regression The slope is obtained.

[0044] The perturbation state vector obtained in S100 Under these conditions, the floating-point arithmetic unit of the intelligent controller performs the calculation of the core control law:

[0045]

[0046]

[0047]

[0048] The controller thus derives a theoretical evaporation rate. Its value is 9.1 This value is passed as an intermediate calculation result to the actuator control subroutine. If, in the next second, personnel enter or exit... The value is updated to 3, and If the value remains unchanged, the controller will immediately recalculate. This real-time feedforward computation based on perturbation measurement ensures that the system responds to environmental changes much faster than traditional feedback systems that rely on concentration measurement lag.

[0049] S300: Within an air supply duct connecting to the target space, a pharmaceutical evaporation module is controlled to operate at the evaporation rate. An air intervention agent is released into the airflow within the air supply duct.

[0050] This step is the execution phase of the system, and its core is to process the abstract physical quantities calculated in S200. ( This is transformed into precise electrical drive for the physical actuator drug vaporization module. This transformation process is jointly accomplished by the actuator driver in the intelligent controller and the electromechanical structure of the vaporization module itself.

[0051] S310: Based on the calculated evaporation rate It queries a pre-stored evaporation rate control signal-evaporation rate mapping relationship data to determine a corresponding evaporation rate control signal.

[0052] Theoretical value calculated by the controller There exists a non-linear mapping relationship between the electrical signals required to drive the hardware (such as PWM duty cycle), which is influenced by various factors such as thermodynamics and fluid dynamics. To achieve precise control, this mapping relationship must be determined through prior experimental calibration. In this embodiment, the core drive signal for the evaporation module is a pulse width modulation (PWM) signal.

[0053] Before the system leaves the factory, each evaporation module is calibrated on a dedicated wind tunnel test bench to establish its unique G-PWM mapping relationship. The calibration procedure is as follows: place the module in a constant wind speed (e.g., 2... Under these conditions, a series of discrete PWM duty cycles (e.g., from 5.0% to 100.0%, in 0.5% steps) are output through a high-precision programmable power supply. After stabilizing for 30 minutes at each duty cycle, the mass loss of the reagent cartridge is measured using a precision electronic balance with a resolution of 0.01 mg, thereby calculating the corresponding actual evaporation rate. All data points After being collected, a high-resolution lookup table (LUT) is generated using polynomial fitting or piecewise linear interpolation. This lookup table is then stored in the Flash memory of the paired smart controller.

[0054] For example, the controller calculates the target in S200. The lookup algorithm within the controller then accesses the G-PWM lookup table. Assume the adjacent data points in the table are:

[0055]

[0056]

[0057] The controller performs linear interpolation:

[0058] .

[0059] Therefore, the controller determines the duty cycle of the required PWM signal output to two decimal places.

[0060] S320: Output the evaporation rate control signal to the drug evaporation module.

[0061] The PWM hardware peripheral in the controller generates a square wave signal with a frequency of 1kHz based on the duty cycle of 64.27% calculated by S310, and applies it to the power input terminal of the drug volatilization module through the drive circuit.

[0062] The drug volatilization module (such as...) Figure 3 (As shown) is a precision mechatronics device integrating thermal control, sensing, and mechanical structures, configured to generate a precise drug mass flow in response to an input PWM signal. Its internal structure includes:

[0063] The modular medicine cartridge is a standard-sized, sealed container filled with a porous ceramic or polymer carrier and impregnated with an air-intervention agent. The cartridge integrates a 13.56MHz RFID tag that stores information such as the medicine batch number, expiration date, and calibration curve ID.

[0064] The temperature-controlled volatilization source's core component is a PTC ceramic heating element tightly coupled to the bottom of the reagent cartridge. A precision of... The DS18B20 digital temperature sensor is packaged and mounted directly onto the heating interface. The controller reads the sensor's temperature value at a frequency of 10Hz via a single-wire protocol and compares it with a preset target evaporation temperature (e.g., 10Hz). A built-in PID (Proportional-Integral-Derivative) control algorithm dynamically fine-tunes the PWM duty cycle of the PTC driver based on the temperature error, forming a fast-response closed-loop temperature control system. This closed loop actively counteracts the interference caused by fluctuations in supply air temperature or unstable input voltage on the evaporation rate.

[0065] The forced dispersion unit consists of a miniature DC brushless vortex fan positioned downstream of the evaporation surface. This fan actively disperses the high-concentration vapor layer of evaporating pharmaceutical molecules and forces it into the main airflow of the delivery duct. Through turbulence, rapid and uniform mixing is achieved, ensuring the concentration of the generated delivery air is optimal. Uniformity across the pipe cross-section.

[0066] When the module receives a PWM signal with a 64.27% duty cycle, its internal temperature control PID algorithm uses this as the setpoint for the target power, driving the PTC heater to precisely maintain the reagent cartridge at [temperature value missing]. At this stable temperature, the reagent is at 9.15 The rate of evaporation is [missing information]. The evaporated molecules are blown into [missing information] by a diffusion fan at a rate of 90 [missing information]. In the main airflow, a concentration of The airflow used for chemical dosing. This airflow is delivered to the target space, and the flux of the chemical it carries precisely compensates for ventilation dilution (9.0). ) and personnel consumption (0.15) This will stabilize the indoor concentration at the target value of 0.1%. Nearby, the fluctuation range can be controlled within [specific range] as measured in actual tests. Within.

[0067] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit described above can be implemented in hardware.

[0068] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control system for the concentration of air interferon in dynamic occupied environments, characterized in that, include: The sensing unit is configured to acquire the air volume of a target space in real time. and the real-time number of people in the target space ; A drug evaporation module is disposed within an air supply duct communicating with the target space and configured to evaporate at a controllable rate based on an evaporation rate control signal. Release an air interfering agent into the airflow within the air supply duct; and An intelligent controller, which establishes a communication connection with the sensing unit and the drug volatilization module, is configured to: Based on a preset target concentration A preset per capita consumption coefficient The real-time acquired air volume and the real-time number of people Execute a core control law The evaporation rate is calculated. ; as well as Generation and the evaporation rate The corresponding evaporation rate control signal is sent to the drug evaporation module to control the working state of the drug evaporation module.

2. The system according to claim 1, characterized in that, The drug evaporation module includes: a replaceable modular drug cartridge containing the air intervention agent; a positive temperature coefficient constant temperature heating unit thermally connected to the drug cartridge for constant temperature heating of the drug cartridge; a temperature sensor configured to monitor the temperature of the drug cartridge; and a forced diffusion fan configured to blow drug molecules evaporating from the drug cartridge into the airflow.

3. The system according to claim 2, characterized in that, The intelligent controller is further configured to: Receive the real-time temperature of the medicine cartridge from the temperature sensor; and Based on the real-time temperature and a preset target evaporation temperature, closed-loop temperature control is performed on the positive temperature coefficient constant temperature heating unit.

4. The system according to claim 1 or 2, characterized in that, The intelligent controller has pre-stored evaporation rate control signal-evaporation rate mapping data obtained through calibration experiments in its memory. Specifically, the intelligent controller is configured to: Based on the calculated evaporation rate The evaporation rate control signal is determined by querying the evaporation rate control signal-evaporation rate mapping data.

5. The system according to claim 4, characterized in that, The evaporation rate control signal is a pulse width modulation signal, and the evaporation rate control signal-evaporation rate mapping data is a PWM duty cycle and evaporation rate. Functional relationships or lookup tables.

6. The system according to claim 1, characterized in that, The sensing unit includes: An interface for communicating with a building automation system, through which the intelligent controller obtains the air supply volume provided by the building automation system. ;as well as A millimeter-wave radar personnel counter is installed at the entrance of the target space to obtain the real-time number of personnel without being noticed. .

7. The system according to claim 2, characterized in that, The modular medicine cartridge is equipped with an RFID tag. The smart controller identifies the type and batch of the medicine cartridge through the RFID tag and records its installation time and cumulative usage.

8. A method for controlling the concentration of airborne interferon in dynamic occupied environments, characterized in that, Includes the following steps: Real-time acquisition of air volume in a target space and the real-time number of people in the target space ; Based on a preset target concentration A preset per capita consumption coefficient The real-time acquired air volume and the real-time number of people Execute a core control law To calculate the required evaporation rate of a drug. ; as well as Within an air supply duct connecting to the target space, a reagent evaporation module is controlled to operate at the evaporation rate. An air intervention agent is released into the airflow within the air supply duct.

9. The method according to claim 8, characterized in that, The step of controlling the drug volatilization module includes: Based on the calculated evaporation rate It queries a pre-stored evaporation rate control signal-evaporation rate mapping data to determine a corresponding evaporation rate control signal; and The evaporation rate control signal is output to the drug evaporation module.

10. The method according to claim 8 or 9, characterized in that, Also includes: During the operation of the drug evaporation module, the temperature of the previous drug cartridge is continuously monitored; as well as Based on the monitored real-time temperature and a preset target evaporation temperature, closed-loop temperature control is performed on the heating process of the medicine box to maintain a constant temperature of the medicine box.

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