CN112524714A - Automatic control air conditioner pipeline ultraviolet ray killing method and system - Google Patents
Automatic control air conditioner pipeline ultraviolet ray killing method and system Download PDFInfo
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- CN112524714A CN112524714A CN202011360215.6A CN202011360215A CN112524714A CN 112524714 A CN112524714 A CN 112524714A CN 202011360215 A CN202011360215 A CN 202011360215A CN 112524714 A CN112524714 A CN 112524714A
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
An automatically controlled ultraviolet ray killing method and system for air-conditioning pipelines belongs to the technical field of ultraviolet ray killing of central air-conditioning pipelines. Aiming at the problems of unsatisfactory disinfection effect and low disinfection speed of the existing disinfection device, the invention adopts the following scheme: collecting indoor viruses on line, judging the types and the concentrations of the viruses, judging places where pollutants are difficult to discharge through airflow organization, and arranging aerosol sampling points at the places; introducing time and attenuation constants into a formula according to the types of viruses through a program, and calculating the irradiation intensity; through a formula, the irradiation intensity of each point of the pipeline is calculated by using a computer, the minimum value is compared with the obtained irradiation intensity, and the on-off of an ultraviolet lamp is adjusted to realize the disinfection of the virus. The invention adopts computer program control to calculate the intensity of the ultraviolet lamp which meets the maximum bacteria concentration for killing, and realizes automatic identification and conversion through a multi-line time control switch, thereby not only ensuring the sterilization effect, but also saving energy to the maximum extent.
Description
Technical Field
The invention belongs to the technical field of ultraviolet ray elimination of central air-conditioning pipelines, and particularly relates to an automatic control method and system for eliminating ultraviolet rays of an air-conditioning pipeline.
Background
The existing disinfection technologies mainly comprise the following technologies: 1. the circulating air type ultraviolet ray sterilizer can sterilize indoor air environment when people or pets exist indoors, has good light shielding performance and high radiation intensity, but has low sterilization speed and narrow application range, and is not suitable for sterilization of a central air conditioning system. 2. The ozone air sterilizer can generate a large amount of ozone, can be used only under the unmanned condition, and simultaneously has destructiveness on various articles. But the ozone disinfection has the advantages of no harmful residue and secondary pollution, uniform distribution of air disinfection concentration, no dead angle, convenient use and the like. 3. Air-conditioning box adds ultraviolet lamp device: the air retention time is very short and the disinfection effect cannot be guaranteed. 4. A filter and an ultraviolet lamp device: if a low-efficiency filter material is used, the filtering effect is low, and if a high-efficiency filter material is used, the resistance is too large, and there is a problem that the filter material is aged by ultraviolet irradiation.
At present, the ultraviolet sterilization of a central air-conditioning system is mainly divided into two categories of fan coil sterilization and air return pipeline sterilization. The air return pipeline is not widely used for sterilization, and the reason is that the radiation intensity of each point in the air duct is different, the same air flow flows through the air duct, the sterilization effect is different, the phenomenon of incomplete sterilization is easy to occur, and the radiation efficiency of the ultraviolet lamp is not high due to the cooling effect of the air flow on the ultraviolet lamp.
Disclosure of Invention
The invention provides an automatic control method and system for sterilizing an air conditioner pipeline by ultraviolet rays, aiming at solving the problems of non-ideal sterilizing effect, low sterilizing speed and the like of the existing sterilizing device.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an automatically controlled ultraviolet ray killing method for an air conditioner pipeline comprises the following steps:
the method comprises the following steps: collecting indoor viruses on line, judging the types and concentrations of the viruses, judging places where pollutants are difficult to discharge through airflow organization, and reasonably arranging aerosol sampling points by considering areas where the viruses in rooms are easy to spread;
step two: introducing time and attenuation constants into a formula according to the types of viruses through a program, and calculating the required irradiation intensity;
step three: and (4) calculating the irradiation intensity of each point of the pipeline by using a computer through a formula, comparing the minimum value with the irradiation intensity obtained in the step two, and adjusting the on-off of the ultraviolet lamp through the multi-line time control switch to kill the viruses.
An air conditioner pipeline ultraviolet ray sterilization system using the method.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts computer program control to calculate the intensity of the ultraviolet lamp which meets the maximum bacteria concentration for killing, and realizes automatic identification and conversion through a multi-line time control switch, thereby not only ensuring the sterilization effect, but also saving energy to the maximum extent. In addition, the system also adopts a reinforced glass fiber rectangular cover, so that the cooling effect of the airflow on the ultraviolet lamp can be effectively weakened, and the airflow flowing resistance can be reduced.
Under the condition of influenza virus or epidemic situation, the invention carries out ultraviolet sterilization on indoor return air to reach the indoor air inlet standard, thereby reducing the fresh air volume; meanwhile, the device is based on automatic control, can judge the type and concentration of the indoor virus sensitively and accurately and feed back the type and concentration of the indoor virus to the computer, and the computer makes judgment according to the existing program and controls the on-off of the ultraviolet lamp, so that the purpose of controlling the radiation intensity of the ultraviolet lamp is achieved.
Drawings
FIG. 1 is a diagram of a distribution of ultraviolet lamps in a duct;
FIG. 2 is a diagram of a UV parallel circuit connection;
FIG. 3 is a cross-sectional view of the return air duct;
FIG. 4 is a flow chart of the operation of the system apparatus.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.
The first embodiment is as follows: the embodiment describes an automatic control ultraviolet ray disinfection method for an air conditioner pipeline, which comprises the following steps:
the method comprises the following steps: collecting indoor viruses on line, judging the types and concentrations of the viruses, judging places where pollutants are difficult to discharge through airflow organization, and reasonably arranging aerosol sampling points by considering areas where the viruses in rooms are easy to spread;
epidemiology shows that most of the microorganisms are transmitted indoors through droplet transmission or the diffusion of microbial aerosol, respiratory disease infectors mainly including coronavirus, influenza virus, respiratory syncytial virus, human adenovirus, rhinovirus, etc. generate a large number of fine liquid drops when sneezing, coughing and speaking, pathogenic bacteria are attached to the particles, the transmission possibility depends on the retention time of the particles in the air, and the time is related to the size of the particles, the particle size of the viruses is 0.1 micron, the particles harmful to human bodies are below 10 microns, the self transmission capability of the particles is limited, the common particles are mainly transmitted indoors depending on secondary airflow, namely indoor airflow formed by ventilation or cold and heat source convection, so the common aerosol moves depending on the airflow as long as the indoor airflow tissue is mastered, the diffusion rule of the dust in the room can be mastered, and the method has an instructive effect on the determination of the sampling point of the indoor microbial aerosol particles.
Step two: introducing time and attenuation constants into a formula according to the types of viruses through a program, and calculating the required irradiation intensity;
step three: and (4) calculating the irradiation intensity of each point of the pipeline by using a computer through a formula, comparing the minimum value with the irradiation intensity obtained in the step two, and adjusting the on-off of the ultraviolet lamp through the multi-line time control switch to kill the viruses.
The second embodiment is as follows: the first step of the method for automatically controlling ultraviolet ray sterilization of the air-conditioning pipeline in the specific embodiment is specifically as follows: the virus detection equipment adopts a Raman virus identification principle, adopts a vertically-arranged carbon nano tube forest with different filtration porosities as a sampler to capture different viruses, and performs in-situ Raman spectrum analysis on the captured viruses, and is provided with a biological intelligent chip for maintaining the virus activity and purifying the viruses so as to be used for rapid enrichment and optical identification of respiratory viruses; by combining the multi-virus capture component with the surface enhanced Raman spectrum, different emerging strains (or unknown viruses) can be enriched and identified in real time, the time consumption is short, the virus capture and detection only takes several minutes, and the enrichment is 70 times; only needs to be as low as 102EID50The detection can be realized by the aid of/mL, and the virus specificity is 90%; the method comprises the steps of simulating the air flow organization of a room under a specific air conditioner air supply condition by using fluent software, judging places where pollutants are not easy to discharge according to the air flow organization, and reasonably arranging aerosol sampling points by considering areas where viruses of the room are easy to spread, such as personnel working areas and the like.
The third concrete implementation mode: in a specific embodiment, the automatically-controlled ultraviolet ray killing method for the air-conditioning pipeline is characterized in that the carbon nanotube forest is a slender carbon nanotube array and is prepared by a water-assisted chemical vapor deposition method, and the diameter of the nanotube is 0.25-25 nm, and the length of the nanotube is about 1 cm. The top surface of the nano tube is provided with a hydrophilic layer, and the bottom surface of the nano tube is provided with a super hydrophobic layer, so that water molecules are trapped inside the nano tube.
The invention provides a portable microfluidic platform, which comprises a carbon nano tube array and differential filtration porosity rapid enrichment and virus optical identification. Different emerging strains (or unknown viruses) can be identified in abundance and real time by combining multiple virus capture modules with surface enhanced raman spectroscopy. More importantly, after the virus capture and detection chip, the virus is still viable and a purified micro-device is obtained, allowing for a variety of routine methods of in-depth characterization to follow. The automatic control is mainly embodied in controlling the number of the ultraviolet lamps to be turned on, and determining the number of the ultraviolet lamps to be turned on according to the type and concentration of the virus, as shown in fig. 4, which reflects the general workflow of the whole system and the program requirements required by the automatic control part.
The fourth concrete implementation mode: in a specific embodiment, the calculation of the irradiation intensity in the second step is specifically as follows:
the radiation intensity of any point in the ultraviolet radiation field in the room can be calculated by an inverse square formula, but the inverse square formula does not explain the influence of the size of the ultraviolet lamp on the radiation intensity, so the method adopts an angle coefficient formula to calculate the radiation intensity:
X＝(1+H)2+L2
Y＝(1-H)2+L2
in the formula, F1-2(x, l, r) -radiant angle coefficient of the lamp, dimensionless, lower subscript to the percentage of emitted radiant energy in plane 1 that falls into plane 2; x-distance from any point to the lamp, cm; l-cross-sectional length of the lamp, cm; r-radius of the lamp, cm; H. l, X, Y are dimensionless numbers, are intermediate variables and have no specific meaning;
in the formula, I-radiation intensity at different positions,. mu.W/cm2；F1-2-radiation angle coefficient, dimensionless number; eUV-output power of the ultraviolet lamp, μ W;
the radiation intensity of the ultraviolet lamps at different distances from the lamps is calculated by using the formula, x is an unknown number for a specific ultraviolet lamp, the formula (1) and the formula (2) are introduced into a computer, a program is designed, when a plurality of ultraviolet lamps act on a certain point at the same time, the ultraviolet radiation intensity value of the point is calculated by adopting a mathematical superposition method, and the point with the minimum radiation intensity in the pipeline is calculated.
The fifth concrete implementation mode: in a third step, the concentration of the viruses is calculated by an indoor virus online acquisition system, and the specific formula is as follows: s (t) ═ e-KItS (t) -number of viable bacteria; k-decay constant, cm2/(. mu.W.s); i-irradiation intensity of ultraviolet lamp, μ W/cm2(ii) a t-irradiation time, s; and transmitting the concentration value to a computer, and calculating the minimum radiation intensity of the pipeline through a set program.
For a specific pipeline, the air volume is determined, the cross section area and the length are determined, and the time for the airflow to pass through the pipeline can be determined; for different species of bacteria, K is a different constant value. Therefore, when the number of viable bacteria is sufficiently small or even 0, the irradiation intensity value required by the system can be determined.
The sixth specific implementation mode: in the third step, each group of ultraviolet lamps are connected in parallel and are simultaneously connected to a multi-line time control switch, as shown in fig. 1 and 2. The purpose is to control each group of ultraviolet lamps respectively.
The air temperature in the air-conditioning system return air duct is low, the speed is high, the temperature in the lamp duct can be obviously reduced under the cooling effect of the ultraviolet lamp, the effective output energy of the ultraviolet lamp is reduced, and the irradiation intensity of ultraviolet rays is reduced. In order to solve the problem, the invention adopts the glass fiber rectangular cover which has good heat insulation performance, is transparent and can transmit light, thereby not only ensuring the proper working temperature of the ultraviolet lamp, but also not influencing the light transmission of the ultraviolet lamp. And meanwhile, a glass fiber rectangular cover is added, so that the flowing resistance of the airflow can be reduced. The cross section of the rectangular air duct is cut to obtain a cross section of the air duct, and as shown in fig. 3, the spatial positions of the ultraviolet lamp, the rectangular tube wall and the glass fiber rectangular cover can be preliminarily known.
The seventh embodiment: in the automatic control method for ultraviolet radiation sterilization of air-conditioning ducts according to the sixth embodiment, the ultraviolet lamp is provided with a rectangular cover of glass fiber for ensuring proper working temperature of the ultraviolet lamp and reducing air flow.
The specific implementation mode is eight: an air conditioning duct ultraviolet disinfection system using the method of any one of embodiments one to seven.
Claims (8)
1. An automatically controlled ultraviolet ray killing method for an air conditioner pipeline is characterized in that: the method comprises the following steps:
the method comprises the following steps: collecting indoor viruses on line, judging the types and concentrations of the viruses, judging places where pollutants are difficult to discharge through airflow organization, and reasonably arranging aerosol sampling points by considering areas where the viruses in rooms are easy to spread;
step two: introducing time and attenuation constants into a formula according to the types of viruses through a program, and calculating the required irradiation intensity;
step three: and (4) calculating the irradiation intensity of each point of the pipeline by using a computer through a formula, comparing the minimum value with the irradiation intensity obtained in the step two, and adjusting the on-off of the ultraviolet lamp through the multi-line time control switch to kill the viruses.
2. The automatic control ultraviolet ray disinfection method for the air conditioner pipeline as claimed in claim 1, wherein the method comprises the following steps: the first step is specifically as follows: adopting Raman virus identification principle, adopting vertically arranged carbon nano tube forest with different filtration porosity as sampler to capture different viruses, carrying out in-situ Raman spectrum analysis on the captured viruses, and configuring a biological intelligent chip in detection equipment; by combining the multi-virus capture component with the principle and surface enhanced Raman spectroscopy, different strains are enriched and identified in real time; and simulating the airflow organization of the room under the air supply condition of the specific air conditioner by using fluent software, judging the place where pollutants are difficult to discharge according to the airflow organization, and considering the area where the room viruses are easy to spread, thereby reasonably arranging aerosol sampling points.
3. The automatic control ultraviolet ray disinfection method for the air conditioner pipeline as claimed in claim 1, wherein the method comprises the following steps: the carbon nanotube forest is a slender carbon nanotube array and is prepared by a water-assisted chemical vapor deposition method, the diameter of the nanotube is 0.25-25 nm, and the length of the nanotube is about 1 cm.
4. The automatic control ultraviolet ray disinfection method for the air conditioner pipeline as claimed in claim 1, wherein the method comprises the following steps: the calculation of the irradiation intensity in the second step is specifically as follows:
calculating the irradiation intensity by adopting an angle coefficient formula:
X＝(1+H)2+L2
Y＝(1-H)2+L2
in the formula, F1-2(x, l, r) -lamp spokesThe firing angle coefficient is dimensionless; x-distance from any point to the lamp, cm; l-cross-sectional length of the lamp, cm; r-radius of the lamp, cm; H. l, X, Y are dimensionless numbers;
in the formula, I-radiation intensity at different positions,. mu.W/cm2；F1-2-radiation angle coefficient, dimensionless number; eUV-output power of the ultraviolet lamp, μ W;
the radiation intensity of the ultraviolet lamps at different distances from the lamps is calculated by using the formula, x is an unknown number for a specific ultraviolet lamp, the formula (1) and the formula (2) are introduced into a computer, a program is designed, when a plurality of ultraviolet lamps act on a certain point at the same time, the ultraviolet radiation intensity value of the point is calculated by adopting a mathematical superposition method, and the point with the minimum radiation intensity in the pipeline is calculated.
5. The automatic control ultraviolet ray disinfection method for the air conditioner pipeline as claimed in claim 1, wherein the method comprises the following steps: in the third step, the concentration of the virus is obtained by calculation through an indoor virus online acquisition system, and the specific formula is as follows: s (t) ═ e-KItS (t) -number of viable bacteria; k-decay constant, cm2/(. mu.W.s); i-irradiation intensity of ultraviolet lamp, μ W/cm2(ii) a t-irradiation time, s; and transmitting the concentration value to a computer, and calculating the minimum radiation intensity of the pipeline through a set program.
6. The automatic control ultraviolet ray disinfection method for the air conditioner pipeline as claimed in claim 1, wherein the method comprises the following steps: in the third step, the ultraviolet lamps are connected in parallel and connected to the multi-line time control switch.
7. The automatic control ultraviolet ray disinfection method for the air conditioner pipeline as claimed in claim 6, wherein the method comprises the following steps: the ultraviolet lamp is provided with a glass fiber rectangular cover for ensuring the ultraviolet lamp to have proper working temperature and reducing air flow.
8. An air conditioning duct ultraviolet disinfection system using the method of any one of claims 1 to 7.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113179571A (en) * | 2021-04-08 | 2021-07-27 | 北京戴纳实验科技有限公司 | Ultraviolet illumination management and control system |
| CN113893376A (en) * | 2021-09-22 | 2022-01-07 | 首都医科大学附属北京世纪坛医院 | Polymorphic space disinfection system based on digital twinning |
| CN113899050A (en) * | 2021-09-22 | 2022-01-07 | 首都医科大学附属北京世纪坛医院 | Air curtain space barrier device and system based on aerodynamic model |
| CN114608177A (en) * | 2022-03-16 | 2022-06-10 | 图方便（苏州）环保科技有限公司 | Control method and system of ultraviolet automatic sterilization, disinfection and fresh air system |
| CN115717750A (en) * | 2022-11-25 | 2023-02-28 | 宁波奥克斯电气股份有限公司 | Indoor sterilization method and device, air conditioner and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113893376A (en) * | 2021-09-22 | 2022-01-07 | 首都医科大学附属北京世纪坛医院 | Polymorphic space disinfection system based on digital twinning |
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| CN114608177A (en) * | 2022-03-16 | 2022-06-10 | 图方便（苏州）环保科技有限公司 | Control method and system of ultraviolet automatic sterilization, disinfection and fresh air system |
| CN115717750A (en) * | 2022-11-25 | 2023-02-28 | 宁波奥克斯电气股份有限公司 | Indoor sterilization method and device, air conditioner and storage medium |
| CN115717750B (en) * | 2022-11-25 | 2024-06-11 | 宁波奥克斯电气股份有限公司 | Indoor sterilization method and device, air conditioner and storage medium |
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Application publication date: 20210319 |