CN111043699A - Intelligent ventilation radon discharging system applied to workplace - Google Patents
Intelligent ventilation radon discharging system applied to workplace Download PDFInfo
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- CN111043699A CN111043699A CN201911271838.3A CN201911271838A CN111043699A CN 111043699 A CN111043699 A CN 111043699A CN 201911271838 A CN201911271838 A CN 201911271838A CN 111043699 A CN111043699 A CN 111043699A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/32—Supports for air-conditioning, air-humidification or ventilation units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/68—Radon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses an intelligent ventilation radon discharging system applied to a working place, and particularly relates to radon concentration detection, air demand algorithm and ventilation system control. According to the acquired radon concentration change situation of the operation site in real time, on the premise of achieving energy conservation and radon concentration standard, the required ventilation quantity is given through the air quantity demand algorithm, and the working states of the air feeder, the exhaust fan, the fume hood and the side-draft exhaust hood are further regulated and controlled, so that the operation site can realize continuous ventilation for 24 hours, high radon concentration accumulation in the space is avoided, and meanwhile, the normal ventilation requirement after personnel enter the space is ensured.
Description
Technical Field
The invention belongs to the technical field of radon concentration detection and ventilation, and particularly relates to an intelligent ventilation radon discharging system applied to a workplace.
Background
In the practical activities of buildings and underground engineering, particularly the existence of natural radon release source items, the natural radiation level can be increased to a higher level, which is higher than the limit value requirements of GB18871-2002 basic standards for electric radiation protection and radiation source safety and GBZ116-2002 basic standards for radon and daughter control of underground buildings.
Because of the existence of natural radon release source items, natural ventilation can not meet the requirements of radiation protection, monitoring radon release amount is required to be implemented to calculate ventilation quantity, and radon daughter additional irradiation are controlled at the lowest reasonable level in an economic and reasonable mode.
Therefore, in the process, the radon release amount of the operation site, the radon concentration of the site and the ventilation amount are calculated, and the values are acquired so as to control the radon discharge and the radon content.
According to the latest national standard regulation requirements (the radon concentration of the existing underground buildings is lower than 200Bq/m3, and the radon concentration of the underground buildings to be built is lower than 200Bq/m3), but because the radon concentration of the underground buildings is not invariable, the underground buildings are in a variable state in the daily working process, and the ventilation system of the working place cannot be controlled according to the change of the radon concentration, so that the balance between the radon concentration and the ventilation system of the working place is realized on the premise of saving energy.
Disclosure of Invention
In view of the above disadvantages, the main object of the present invention is to provide an intelligent ventilation and radon discharge system applied to a workplace, which is characterized in that a relationship between balanced radon concentration and radon precipitation amount is obtained, radon discharge amount calculation is performed, an algorithm based on radon release amount-site radon concentration-ventilation amount is designed, a radon concentration-ventilation amount device is designed through the algorithm, fresh air and return air amount are reasonably adjusted, site radon concentration level is effectively controlled, and working states of an air feeder, an air exhauster, a ventilation cabinet and a side-suction type exhaust hood are regulated and controlled according to the obtained real-time radon concentration change condition of the workplace on the premise of reaching energy saving and radon concentration standard, so that the workplace can realize continuous ventilation for 24 hours, high radon concentration aggregation in a warehouse is avoided, and normal ventilation requirements after personnel enter the workplace are ensured.
The technical scheme of the invention is as follows:
an intelligent ventilation radon discharging system applied to a working place comprises a PLC control cabinet, a touch display screen and a frequency converter, wherein the input end of the frequency converter is connected with the output end of the PLC control cabinet, the PLC control cabinet is also connected with a first control air valve, a second control air valve, a continuous radon measuring instrument and an alarm, the output end of the continuous radon measuring instrument is connected with the input end of the PLC control cabinet, and the input end of the alarm is connected with the output end of the PLC control cabinet;
the output end of the first control air valve is connected with a ventilation cabinet, and the output end of the second control air valve is connected with a side-suction exhaust hood;
the output of converter is equipped with exhaust fan and forced draught blower, the converter is used for controlling the operating power of exhaust fan and forced draught blower, the real-time operating power of exhaust fan and forced draught blower links in real time with fume chamber and the running state of side-draught type exhaust hood.
In a preferred embodiment, the exhaust fan, the blower, the fume hood and the side-draft exhaust hood are all provided with a physical control button, and the exhaust fan, the blower, the fume hood and the side-draft exhaust hood all comprise two control modes, specifically a physical control button control mode and a PLC control cabinet remote control mode. .
In a preferred embodiment, the first control air valve and the second control air valve are both set as electromagnetic valves and used for receiving control signals sent by a PLC control cabinet and controlling the opening and closing of the fume hood and the side-draft exhaust hood.
In a preferred embodiment, the number of the continuous emanometers is set to be multiple, the installation height of each of the multiple continuous emanometers is 1.5M, and the continuous emanometers are fixed by using a stainless steel frame.
In a preferred embodiment, the PLC control cabinet further receives the operating status of each element, and specifically includes: the entity control buttons and the working state display of the exhaust fan and the air feeder; a physical control button and a working state display of the fume hood are carried out; the side-suction type exhaust hood entity controls the button and displays the working state; and displaying the data of the multiple continuous emanometers in real time on line.
In a preferred embodiment, the operating state of the exhaust fan is set to 1, 2 or 3 grades, the exhaust fan and the air inlet fan are connected with the air pipe by flexible hoses, and the bottom parts of the exhaust fan and the air inlet fan are provided with damping supports.
In a preferred embodiment, the continuous emanometer is a RTM1688-2 type measuring instrument, and the measuring range is 0-107Bq/m3。
In a preferred embodiment, the PLC control cabinet and the touch display screen are arranged at an entrance from the ground surface to a working place.
An algorithm of radon release amount-site radon concentration-ventilation amount specifically comprises the following steps:
obtaining the relation between the equilibrium radon concentration and the radon precipitation quantity:
the radon concentration is reduced by adopting a ventilation method, namely fresh air is introduced into the space from the outside of the space, the radon in the space is diluted and discharged, and the radon concentration of the radon reaches the standard and specified limit value, wherein the specific calculation is as follows:
the change of radon concentration in the operation place during continuous ventilation is as follows:
in the formula:
Rnis the radon concentration in the space, kBq/m3；
Rn0Is the radon concentration of fresh wind3；
Rn1Is the radon concentration in the space at the initial moment, kBq/m3；
J is the average radon exhalation rate of the inner wall surface of the space, kBq/(m)2·s)；
λ0Decay constant of Radon, 2.1X 10-6s-1；
λvFor the ventilation rate, s-1；
S is the surface area of the wall surface of the operation place, m2；
V is the volume of the operation place, m3；
Because lambdav > lambada 0 and lambada 0 is ignored, the radon concentration Rn (t) in the space after the ventilation time t is as follows:
when t → ∞ is reached, the radon concentration in the work site gradually approaches to equilibrium, and the ventilation frequency after the final radon concentration is balanced is as follows:
and (3) obtaining the air quantity Q required by radon discharge after the formula 3 is deformed:
q is the air quantity required by radon discharge, m3/s；
RneqIs the radon concentration in the exhaust air, kBq/m3。
The invention has the beneficial effects that:
according to the method, the relationship between the balanced radon concentration and the radon precipitation amount is obtained, the radon discharge air quantity is calculated, an algorithm based on radon release amount-site radon concentration-ventilation quantity is designed, a radon concentration-ventilation quantity device is designed through the algorithm, fresh air and return air quantity are reasonably adjusted, the site radon concentration level is effectively controlled, the working states of an air feeder, an exhaust fan, a ventilation cabinet and a side-suction type exhaust hood are adjusted and controlled according to the obtained real-time radon concentration change condition of a working site on the premise of reaching the energy saving and radon concentration standard, the continuous 24-hour ventilation of the working site is realized, the high radon concentration aggregation in a warehouse is avoided, and the normal ventilation requirement after people enter the warehouse is ensured.
Drawings
FIG. 1 is a schematic structural diagram of the apparatus of the present invention.
Fig. 2 is a schematic diagram of the system connection structure of the present invention.
The reference signs are: 1. a PLC control cabinet; 2. a touch display screen; 3. a frequency converter; 4. a first control air valve; 5. a second control air valve; 6. a continuous emanometer; 7. an alarm; 8. a fume hood; 9. a side-draft exhaust hood; 10. an exhaust fan; 11. a blower; 12. and a wind pressure sensor.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The automatic radon concentration detection system for the operation place comprises a PLC (programmable logic controller) control cabinet 1, a touch display screen 2 and a frequency converter 3, wherein the input end of the frequency converter 3 is connected with the output end of the PLC control cabinet 1, the PLC control cabinet 1 is also connected with a first control air valve 4, a second control air valve 5, a continuous radon measuring instrument 6, an alarm 7 and an air pressure sensor 12, the output ends of the continuous radon measuring instrument 6 and the air pressure sensor 12 are connected with the input end of the PLC control cabinet 1, and the input end of the alarm 7 is connected with the output end of the PLC control cabinet 1;
the output end of the first control air valve 4 is connected with a ventilation cabinet 8, and the output end of the second control air valve 5 is connected with a side-suction type exhaust hood 9;
the output end of the frequency converter 3 is provided with an exhaust fan 10 and a blower 11, and the frequency converter 3 is used for controlling the running power of the exhaust fan 10 and the blower 11;
the first control air valve 4 and the second control air valve 5 are both set as electromagnetic valves and used for receiving control signals sent by the PLC control cabinet 1 and controlling the opening and closing of the fume hood 8 and the side-suction type exhaust hood 9;
in the embodiment, the opening and closing of the air duct of the fume hood 8 are realized through the first control air valve 4, and the opening and closing of the air duct of the side-suction type exhaust hood 9 are realized through the second control air valve 5;
different from the embodiment 1, in the invention, the exhaust fan 10, the blower 11, the fume hood 8 and the side-draft exhaust hood 9 are all provided with entity control buttons, and the exhaust fan 10, the blower 11, the fume hood 8 and the side-draft exhaust hood 9 all comprise two control modes, specifically an entity control button control mode and a PLC control cabinet 1 remote control mode;
wherein, the real-time operation power of the exhaust fan 10 and the blower 11 is linked with the operation state of the fume hood 8 and the side-draft type exhaust hood 9 in real time;
in the embodiment, the control modes of the fume hood 8 and the side-suction type exhaust hood 9 comprise two modes of a physical control button and a PLC (programmable logic controller) control cabinet 1 virtual regulation, the running states of the fume hood 8 and the side-suction type exhaust hood 9 are linked with the real-time running power of the exhaust fan 10 and the blower 11, the blower 11 and the exhaust fan 10 are controlled by the frequency converter 3, the working power of the blower 11 and the exhaust fan 10 can be adjusted in real time according to the air volume required by the system, and the energy-saving purpose is achieved while the air volume is ensured;
further, on the basis of the embodiment 1-2, the PLC control cabinet 1 further receives the operating states of the respective components, and specifically includes: the physical control buttons and the working state display of the exhaust fan 10 and the blower 11; the physical control button and the working state display of the fume hood 8; the side-suction type exhaust hood 9 is provided with a physical control button and a working state display; the data of a plurality of continuous emanometers 6 are displayed on line in real time; indoor wind pressure information of a workplace detected by a wind pressure sensor 12;
the running state of the exhaust fan 10 is set to 1, 2 and 3 grades, the exhaust fan 10 and the air inlet fan are connected with an air pipe through flexible hoses, the bottoms of the exhaust fan 10 and the air inlet fan are respectively provided with a damping support, and the PLC control cabinet 1 and the touch display screen 2 are arranged at an inlet from the ground surface to a working place;
according to different running states of the fan, different controls are carried out; the ventilation system of the operation place is controlled in a full-automatic mode, the ventilation system maintains low air volume circulation when no person operates in the operation place is achieved by calling and controlling equipment facilities such as the frequency converter 3, the control air valve and the air pressure sensor 12, and the fan is recovered to the rated air volume to operate when a person enters the operation place, so that the operation place can realize continuous ventilation for 24 hours, the accumulation of high radon concentration in a warehouse is avoided, and the normal ventilation requirement after the person enters the operation place is ensured;
on the basis, in the invention, the number of the continuous emanometers 6 is set to be multiple, the installation heights of the multiple continuous emanometers 6 are all 1.5M, the continuous emanometers 6 are fixed by adopting stainless steel frames, the continuous emanometer 6 is particularly an RTM1688-2 type measuring instrument, and the measuring wide range is 0-107Bq/M3；
Calculating data measured by the continuous radon measuring instrument 6 to obtain data of radon release amount-site radon concentration-ventilation amount, which specifically comprises the following steps:
obtaining the relation between the equilibrium radon concentration and the radon precipitation quantity:
the radon concentration is reduced by adopting a ventilation method, namely fresh air is introduced into the space from the outside of the space, the radon in the space is diluted and discharged, and the radon concentration of the radon reaches the standard and specified limit value, wherein the specific calculation is as follows:
the change of radon concentration in the operation place during continuous ventilation is as follows:
in the formula:
Rnis the radon concentration in the space, kBq/m3；
Rn0Is the radon concentration of fresh wind3；
Rn1Is the radon concentration in the space at the initial moment, kBq/m3；
J is the average radon exhalation rate of the inner wall surface of the space, kBq/(m)2·s)；
λ0Decay constant of Radon, 2.1X 10-6s-1；
λvFor the ventilation rate, s-1；
S is the surface area of the wall surface of the operation place, m2；
V is the volume of the operation place, m3；
Because lambdav > lambada 0 and lambada 0 is ignored, the radon concentration Rn (t) in the space after the ventilation time t is as follows:
when t → ∞ is reached, the radon concentration in the work site gradually approaches to equilibrium, and the ventilation frequency after the final radon concentration is balanced is as follows:
and (3) obtaining the air quantity Q required by radon discharge after the formula 3 is deformed:
q is the air quantity required by radon discharge, m3/s；
RneqIs the radon concentration in the exhaust air, kBq/m3；
By acquiring the relation between the balanced radon concentration and the radon precipitation amount, calculating the radon discharge air quantity, designing an algorithm based on the radon release amount-site radon concentration-ventilation quantity, designing a radon concentration-ventilation quantity device through the algorithm, reasonably adjusting the fresh air and the return air quantity, and effectively controlling the site radon concentration level;
according to the acquired real-time radon concentration change condition of the operation place, on the premise of achieving energy conservation and radon concentration standard reaching, the working states of the air feeder 11, the exhaust fan 10, the fume chamber 8 and the side-suction type exhaust hood 9 are regulated and controlled, so that the operation place can realize continuous ventilation for 24 hours, high radon concentration aggregation in the room is avoided, and meanwhile, the normal ventilation requirement after people enter the room is ensured.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. The intelligent ventilation radon discharging system applied to a working place is characterized by comprising a PLC (programmable logic controller) cabinet (1), a touch display screen (2) and a frequency converter (3), wherein the input end of the frequency converter (3) is connected with the output end of the PLC cabinet (1), the PLC cabinet (1) is further connected with a first control air valve (4), a second control air valve (5), a continuous radon measuring instrument (6), an alarm (7) and an air pressure sensor (12), the output end of the continuous radon measuring instrument (6) and the output end of the air pressure sensor (12) are connected with the input end of the PLC cabinet (1), and the input end of the alarm (7) is connected with the output end of the PLC cabinet (1);
the output end of the first control air valve (4) is connected with a ventilation cabinet (8), and the output end of the second control air valve (5) is connected with a side-draft exhaust hood (9);
the output of converter (3) is equipped with exhaust fan (10) and forced draught blower (11), converter (3) are used for controlling the operating power of exhaust fan (10) and forced draught blower (11).
2. The intelligent ventilation radon discharging system applied to a workplace according to claim 1, wherein: all be equipped with entity control button on exhaust fan (10), forced draught blower (11), fume chamber (8) and the side draft exhaust hood (9), exhaust fan (10), forced draught blower (11), fume chamber (8) and side draft exhaust hood (9) all contain two kinds of control mode, for entity control button control mode and PLC switch board (1) remote control mode.
3. The intelligent ventilation radon discharging system applied to a workplace according to claim 1, wherein: the first control air valve (4) and the second control air valve (5) are both set to be electromagnetic valves and used for receiving control signals sent by the PLC control cabinet (1) and controlling the opening and closing of the ventilation cabinet (8) and the side-suction type exhaust hood (9).
4. The intelligent ventilation radon discharging system applied to a workplace according to claim 1, wherein: the number of the continuous emanometer (6) is set to be a plurality, the installation height of the continuous emanometer (6) is 1.5M, and the continuous emanometer is fixed by a stainless steel frame.
5. The automatic radon concentration detection system for workplaces as claimed in claim 2, wherein: the PLC control cabinet (1) also receives the working states of all the elements, and concretely comprises an exhaust fan (10), a blower (11), entity control buttons and working state display; the physical control button and the working state display of the fume hood (8); the side-suction type exhaust hood (9) is provided with a physical control button and a working state display; the data of a plurality of continuous emanometers (6) are displayed on line in real time; and the air pressure sensor (12) detects the indoor air pressure information of the workplace.
6. The intelligent ventilation radon discharging system applied to a workplace according to claim 1, wherein: the running state of exhaust fan (10) sets up to 1, 2, 3 shelves, exhaust fan (10) and air inlet machine adopt flexible hose connection with the tuber pipe, shock absorber support is all installed to the bottom of exhaust fan (10) and air inlet machine.
7. The automatic radon concentration detection system for workplaces according to claim 1, which is characterized in that: the continuous emanometer (6) is a RTM1688-2 type measuring instrument, and the measuring wide range is 0-107Bq/m3。
8. The automatic radon concentration detection system for workplaces according to claim 1, which is characterized in that: the PLC control cabinet (1) and the touch display screen (2) are arranged at an entrance from the ground surface to a working place.
9. An intelligent ventilation radon discharge system for workplaces according to claims 1-8 and characterized by: the method also comprises an algorithm of radon release amount-site radon concentration-ventilation volume, which specifically comprises the following steps:
obtaining the relation between the equilibrium radon concentration and the radon precipitation quantity:
the radon concentration is reduced by adopting a ventilation method, namely fresh air is introduced into the space from the outside of the space, the radon in the space is diluted and discharged, and the radon concentration of the radon reaches the standard and specified limit value, wherein the specific calculation is as follows:
the change of radon concentration in the operation place during continuous ventilation is as follows:
in the formula:
Rnis the radon concentration in the space, kBq/m3；
Rn0Is the radon concentration of fresh wind3；
Rn1Is the radon concentration in the space at the initial moment, kBq/m3；
J is the average radon exhalation rate of the inner wall surface of the space, kBq/(m)2·s)；
λ0Decay constant of Radon, 2.1X 10-6s-1；
λvFor the ventilation rate, s-1；
S is the surface area of the wall surface of the operation place, m2；
V is the volume of the operation place, m3；
Because lambdav > lambada 0 and lambada 0 is ignored, the radon concentration Rn (t) in the space after the ventilation time t is as follows:
when t → ∞ is reached, the radon concentration in the work site gradually approaches to equilibrium, and the ventilation frequency after the final radon concentration is balanced is as follows:
and (3) obtaining the air quantity Q required by radon discharge after the formula 3 is deformed:
q is the air quantity required by radon discharge, m3/s；
RneqIs the radon concentration in the exhaust air, kBq/m3。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183901A (en) * | 2021-12-13 | 2022-03-15 | 中国人民解放军火箭军工程大学 | Intelligent control method and system for radon-reducing ventilation system of underground building suitable for multiple scenes |
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