CN113757832A - Method for disinfecting, sterilizing and dedusting air duct, application, air duct, fresh air system and central air conditioning system - Google Patents

Method for disinfecting, sterilizing and dedusting air duct, application, air duct, fresh air system and central air conditioning system Download PDF

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Publication number
CN113757832A
CN113757832A CN202010509450.9A CN202010509450A CN113757832A CN 113757832 A CN113757832 A CN 113757832A CN 202010509450 A CN202010509450 A CN 202010509450A CN 113757832 A CN113757832 A CN 113757832A
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air
air duct
ultraviolet
disinfection
electrostatic
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Chinese (zh)
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唐丹天
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Beijing Xintian Heyi Optoelectronics Technology Co ltd
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Beijing Xintian Heyi Optoelectronics Technology Co ltd
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Priority to CN202010509450.9A priority Critical patent/CN113757832A/en
Publication of CN113757832A publication Critical patent/CN113757832A/en
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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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • 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
    • F24F13/02—Ducting arrangements
    • 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
    • F24F13/02—Ducting arrangements
    • F24F13/029—Duct comprising an opening for inspection, e.g. manhole
    • 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
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • 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
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/24—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using sterilising media
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention relates to a method for disinfecting, sterilizing and dedusting an air duct, application of the method in the air duct, the air duct for disinfecting, sterilizing and dedusting, a fresh air system comprising the air duct and a central air conditioning system. The invention provides a method for disinfecting, sterilizing and dedusting an air duct, which comprises the following steps: filtering the air in the air duct by using an electrostatic filtering mode; sterilizing the air which is filtered by static electricity in the air duct by using an ultraviolet radiation mode; the air in the air duct that has been electrostatically filtered and has been subjected to ultraviolet sterilization is further sterilized using a chemical filter material. The method and the air duct for disinfecting, sterilizing and dedusting can disinfect and sterilize to the maximum extent.

Description

Method for disinfecting, sterilizing and dedusting air duct, application, air duct, fresh air system and central air conditioning system
Technical Field
The invention relates to a disinfection and sterilization device, in particular to a disinfection and sterilization dust removal method for an air duct, application of the method in the air duct, the air duct for disinfection and sterilization dust removal, a fresh air system comprising the air duct for disinfection and sterilization dust removal and a central air conditioning system.
Background
Currently, various viruses have become a new challenge for humans due to their high infectivity, stealth, difficult inactivation, and high lethality. Public places are the main transmission sites of viral diseases due to their mass flow and high density.
The central air-conditioning system generally adopts an air system or a water system environment, and adopts a large amount of indoor air circulation to exchange air by adding outdoor fresh air into an indoor mode no matter an independent fresh air system or a fresh air system in the central air-conditioning system, so that the indoor air is kept fresh. Thus, the indoor air quality and the indoor temperature can be maintained. Meanwhile, due to the fact that people flow in public indoor spaces such as office buildings and markets is large, return air of air circulation is prone to carry various viruses and bacteria with high concentration.
The air speed of a central air-conditioning all-air system or a fresh air system is high, generally 0.5-5 m/s, and air disinfection at high air speed is currently considered to be impossible, so far, only an air purification concept but no air duct ventilation and disinfection concept and no successful air duct sterilization and disinfection product exist. At present, air purification completely depends on air filtration, particulate matters in air are blocked by an air filter, bacteria and viruses are equivalently regarded as the particulate matters, and the high-efficiency filter is adopted to keep an air channel clean, so that the propagation of the bacteria and viruses can be blocked theoretically, but in fact, many infection events show that the high-efficiency filtration is not reliable. The filtration is only to block the virus outside the filter, and does not stop the propagation and replication of virus and bacteria, and the virus and bacteria are difficult to avoid to spread through an air duct under specific environmental conditions. The traditional central air conditioner filter screen purification mode cannot ensure that viruses cannot be spread through a central air supply pipeline of the central air conditioner.
Therefore, the conventional air purification method as described below, although it can perform the function of purifying air, cannot ensure the disinfection and isolation of viruses and bacteria, and is not sufficient to meet the requirement of epidemic infection control.
1) Physical filtration mode
Aiming at the blocking and killing of viruses, the primary filter and the intermediate filter obviously cannot play an effective blocking role. Therefore, the high-efficiency filter and the ultra-high-efficiency filter are mainly used at present, the high-efficiency filter can block particles with the particle size of more than 0.3 micrometer, the blocking efficiency of the high-efficiency filter can reach 99.9%, and the ultra-high-efficiency filter, such as an HEPA high-efficiency filter, can block particles with the particle size of more than 0.1 micrometer even reach 99.97%. However, although high efficiency filters can substantially block the transmission of viruses and bacteria, they do not ensure complete blockage and killing of the viruses and bacteria. Meanwhile, the blocked viruses and bacteria cannot be killed quickly, namely, the viruses and bacteria still have the possibility of breeding in the filter, such as breeding easily under the conditions of a damp environment, dead corners, stopping and restarting at night and the like.
Another application problem of the high-efficiency filter and the ultra-high-efficiency filter is that the wind resistance of the high-efficiency filter is large, such as the initial wind resistance of the high-efficiency filter is less than 220pa, and the final wind resistance can reach 400 pa. The high wind resistance causes that the air conditioner cannot be used due to insufficient wind power of a fan or the refrigeration and heating efficiency is reduced due to use in many application environments, so that high energy consumption is caused, and particularly, most of stocked buildings are difficult to be applied because a system is not designed according to high-efficiency filtration.
2) Electrostatic adsorption filtration
The electrostatic adsorption filtration is generally an air filtration mode which forms high voltage of a cathode and an anode in a micro-current environment, and a polar plate adsorbs particles flowing through the air to the polar plate, and is a novel air purification mode which gradually begins to be popularized and applied in recent years.
However, electrostatic dust collection has two major drawbacks in application. Firstly, as the service life is prolonged, the escape rate of viruses and bacteria in electrostatic dust collection is gradually increased, and the blockage and the sterilization of the viruses and the bacteria can not be completely ensured any more. Secondly, the high voltage of the generated static electricity can cause the molecular change of oxygen in the air to form ozone, and the ozone has certain harm to human bodies, strong corrosivity and peculiar smell, and is a great defect of application.
Therefore, a new disinfection and sterilization apparatus is urgently needed to deal with the problem that the ventilation system cannot filter viruses and bacteria.
Disclosure of Invention
It is an aim of at least the preferred embodiments of the present invention to address some of the above disadvantages. An additional or alternative object is to at least provide the public with a useful choice.
The invention aims to establish a novel air duct disinfection theory, namely, virus and bacteria entering an air duct are killed rather than blocked, and the problem of high difficulty in instantly killing the virus and bacteria at high wind speed is solved.
The invention provides a method for disinfecting, sterilizing and dedusting an air duct, which comprises the following steps:
filtering the air in the air duct by using an electrostatic filtering mode;
sterilizing the air which is filtered by static electricity in the air duct by using an ultraviolet radiation mode;
the air in the air duct that has been electrostatically filtered and has been subjected to ultraviolet sterilization is further sterilized using a chemical filter material.
In one aspect, the electrostatic filtering includes generating static electricity using anode and cathode plates of an ionization module located at opposite sides of an electrostatic filter screen such that the electrostatic filter screen and/or a dust collection section located at the rear of the ionization module adsorbs particles in the air.
In one aspect, the ultraviolet radiation comprises ultraviolet light generated by an ultraviolet lamp in the air duct to disinfect air flowing through the air duct.
In one aspect, the ultraviolet light is at least partially reflected by the inner walls of the air duct and/or the air passes around the ultraviolet lamp within a radius of 90-110 mm.
In one aspect, the chemical filter material is applied to a chemical filter screen through which air in an air duct flows to contact the chemical filter material, thereby disinfecting the air flowing through the air duct.
The invention also proposes the use of a method according to the above in an air duct.
The invention also provides an air duct for disinfection, sterilization and dust removal, which comprises:
the electrostatic disinfection and dust removal device comprises an electrostatic disinfection and dust removal air channel shell, an electrostatic filter screen and an ionization module, wherein the electrostatic filter screen is arranged in the electrostatic disinfection and dust removal air channel shell to filter particles, the ionization module at least comprises an anode plate and a cathode plate, and the anode plate and the cathode plate are respectively positioned at two opposite sides of the electrostatic filter screen to enable the electrostatic filter screen to adsorb the particles by emitting static electricity;
at least one ultraviolet sterilizing device coupled with the at least one electrostatic sterilizing and dust removing device, wherein the ultraviolet sterilizing device comprises an ultraviolet sterilizing air channel shell and at least one ultraviolet lamp, and the ultraviolet lamp is arranged in the ultraviolet sterilizing air channel shell to emit ultraviolet rays for sterilization;
the chemical filtering device comprises a chemical filtering air duct shell and a chemical filtering screen formed by a filtering material and the filtering screen together, and the chemical filtering device is positioned in the chemical filtering air duct shell to eliminate harmful substances.
In one aspect, the wind resistance at the electrostatic disinfecting and dust removing device is 10-30 pa.
In one aspect, the ionization module further comprises a dust collection section located at the rear of the electrostatic filter screen to collect dust passing through the anode and cathode plates.
In one aspect, the uv lamps are located at and/or on both sides of the central axis of the uv sterilizing tunnel housing.
In one aspect, the inner wall of the periphery of the ultraviolet sterilization air duct shell is made of a specular reflection material.
On one hand, the ultraviolet sterilization device also comprises an ultraviolet air inlet guide plate which is arranged near the air inlet of the ultraviolet sterilization air channel shell and is used for guiding the air passing through the ultraviolet sterilization air channel shell.
On one hand, the chemical filter material guide plate is arranged at the rear part of the inner side of the ultraviolet sterilization air duct shell and near the front part of the air inlet of the chemical filter device so as to guide the air passing through the chemical filter material guide plate.
On the one hand, the electrostatic disinfection and dust removal air channel shell further comprises a maintenance door for an electrostatic filter screen, which is positioned on the side surface of the electrostatic disinfection and dust removal air channel shell, the ultraviolet sterilization air channel shell further comprises an observation window and an ultraviolet lamp side maintenance door, which are positioned on the side surface of the ultraviolet sterilization air channel shell, and/or the chemical filtration air channel shell further comprises a chemical filtration screen side maintenance door, which is positioned on the side surface of the chemical filtration air channel shell.
The invention also provides a fresh air system comprising the air duct for disinfection, sterilization and dust removal, wherein the air duct is positioned or additionally arranged on an air return section or an air supply section capable of bearing wind resistance of the fresh air system.
The invention also provides a central air-conditioning system comprising the air duct for disinfection, sterilization and dust removal, wherein the air duct is positioned or additionally arranged on an air return section or an air supply section capable of bearing wind resistance of the central air-conditioning system.
The method provided by the invention can maximally approach 100% sterilization and disinfection, and is suitable for various central air-conditioning air ducts and fresh air systems. The invention provides a novel combined disinfection structure for gradually intercepting bacteria, viruses and dust in air by adopting three disinfection technologies, and simultaneously adopts a plurality of targeted structural designs around the combined use.
The application provided by the invention has great advantages, the reconstruction of the new project and the built project is simple and easy, the low wind resistance is realized in the air duct without additionally increasing the power of the fan, the maintenance is convenient, no harmful gas is generated, and no peculiar smell is generated.
Drawings
Preferred forms of embodiments in accordance with the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
FIG. 1 illustrates a sterilizing and dust removing air duct according to a preferred embodiment of the present invention;
FIG. 2 illustrates an electrostatic disinfecting and dust removing apparatus according to a preferred embodiment of the present invention;
FIG. 3 illustrates an ultraviolet sterilization apparatus according to a preferred embodiment of the present invention;
FIG. 4 illustrates a chemical filter apparatus according to a preferred embodiment of the present invention;
FIG. 5 illustrates a top perspective view of a duct according to a preferred embodiment of the present invention showing an ultraviolet inlet air deflector and a chemical filter material deflector.
Description of the reference numerals
10-air flue for disinfection, sterilization and dust removal, 11-electrostatic disinfection and dust removal device, 21-ultraviolet sterilization device, 31-chemical filtration device, 101-electrostatic filtration screen, 103-maintenance door for electrostatic filtration screen, 105-air flue shell for electrostatic disinfection and dust removal, 201-ultraviolet lamp, 203-ultraviolet air inlet guide plate, 205-observation window, 207-ultraviolet lamp side maintenance door, 209-ultraviolet disinfection air flue shell, 301-chemical filtration screen, 303-chemical filtration air inlet guide plate, 305-chemical filtration screen side maintenance door and 307-chemical filtration air flue shell.
Detailed Description
The invention takes a combined disinfection technology as one of the bases of instantaneous disinfection and sterilization, and three technologies of high-voltage electrostatic ionization adsorption micro-current disinfection and sterilization, ultraviolet radiation disinfection and chemical substance contact disinfection are used for triple disinfection, and the latter disinfection technology makes up for the defects of the former. Meanwhile, the invention can improve the killing strength of each disinfection link to be instant sterilization.
The invention provides a disinfection, sterilization and dust removal method for an air duct, which comprises the steps of disinfecting, sterilizing and removing dust for gas in the air duct by using three different modes so as to maximally kill viruses, bacteria, particles and the like in the air, so that the air discharged from the air duct is clean and sanitary air, and the propagation of the viruses and the bacteria in the air is avoided. In the method, firstly, dust in the air of the air duct and particles attached with viruses and bacteria are adsorbed by static electricity in a static electricity filtering mode to sterilize and remove dust, wherein the static electricity filtering mode comprises the step of generating static electricity by utilizing an anode plate and a cathode plate of ionization modules positioned at two opposite sides of the static electricity filtering screen, so that the static electricity filtering screen and/or a dust collecting section positioned at the rear part of the ionization modules adsorb the particles in the air. Then the air which is filtered by static electricity in the air duct is disinfected and sterilized by using an ultraviolet sterilization mode, specifically, the air which passes through the air duct is radiated by using an ultraviolet lamp so that virus and bacteria are killed instantly, preferably, ultraviolet rays emitted by the ultraviolet lamp are at least partially reflected by the inner wall of the air duct, and the air passes through a radius range of 90-110mm around the ultraviolet lamp, preferably a radius range of 100mm, so as to optimize the sterilization effect on the air. And finally, a chemical filtering mode is used, the air which is subjected to electrostatic filtering and ultraviolet disinfection and sterilization in the air channel is subjected to contact disinfection and sterilization by utilizing a chemical filtering material, and the chemical filtering material can be coated on the chemical filtering screen, so that the air in the air channel flows through the chemical filtering screen to contact the chemical filtering material, and the air flowing through the air channel is disinfected and sterilized.
The method has the advantages that the method adopts the electrostatic filtration mode to eliminate the particulate matters in the air through adsorption, so that over 90 percent of PM2.5 particulate matters in the air are adsorbed and the virus and bacteria are instantly killed. The ultraviolet sterilization mode is then used to realize full-dimensional radiation sterilization of virus and bacteria, and the air can be subjected to ultraviolet sterilization to the maximum extent through the arrangement of the air duct inner side of the optional mirror surface and the guide plate. The chemical filtering mode used finally can be that the chemical filter material contacts with the air flowing through the chemical filter screen to achieve the purpose of killing the bacteria and viruses, and the air contacts with the chemical filter material to the maximum extent through the arrangement of the optional guide plate, so that the killing maximization of the bacteria and viruses is achieved, and meanwhile, the ozone in the air is oxidized and reduced to play a role in reducing the ozone.
According to an embodiment of the invention, the application of the method in the air duct is further provided.
The invention also provides a three-section triple-disinfection sterilization dust removal air duct, which mutually compensates by a combination technology to realize the complete disinfection of the virus and bacteria in the air passing through the air duct. The first section is an electrostatic disinfection and dust removal device, the second section is an ultraviolet disinfection cabin, and the third section is a chemical filtration and disinfection device.
Fig. 1 shows a sterilizing and dust removing air duct according to an embodiment of the present invention, which mainly shows the structure in the air duct. The air duct 10 includes three parts, namely an electrostatic sterilizing and dust removing device 11 installed at the front part, an ultraviolet sterilizing device 21 installed at the middle part thereof, and a chemical filtering device 31 installed at the rear part thereof. Of course, the air duct for sterilization, disinfection and dust removal of the present invention may also include more than three parts, such as an electrostatic sterilization and dust removal device installed at the front of the installation, two ultraviolet sterilization devices installed at the middle thereof, and a chemical filtering device installed at the rear thereof, or such as an electrostatic sterilization and dust removal device installed at the front thereof, two ultraviolet sterilization devices installed at the middle thereof, and two chemical filtering devices installed at the rear thereof. The electrostatic disinfection and dust removal device, the ultraviolet sterilization device and the chemical filtering device can be connected by adopting a three-section independent flange connecting structure. In addition, any one of the three sections is adopted for overlapping use, for example, 2 groups of ultraviolet sterilization devices are preferably used in an overlapping mode, and the sterilization capability is enhanced in application.
The electrostatic disinfecting and dust removing device of the first section comprises: the electrostatic disinfection and dust removal air duct comprises an electrostatic disinfection and dust removal air duct shell, at least one layer of electrostatic filter screen and an ionization module, wherein the at least one layer of electrostatic filter screen is installed in the front of the electrostatic disinfection and dust removal shell to filter particles, the ionization module at least comprises an anode plate and a cathode plate, the anode plate and the cathode plate are respectively located on two opposite sides of the electrostatic filter screen to enable the electrostatic filter screen to adsorb the particles in the air by sending static electricity, and the adsorption of PM2.5 particles in the air by more than 90% and the instant killing of virus and bacteria are realized.
Specifically, the electrostatic disinfecting and dust removing apparatus 11 according to the embodiment of the present invention includes an electrostatic filtering screen 101, an ionizing module (not shown) and an electrostatic disinfecting and dust removing duct housing 105, and both the electrostatic filtering screen 101 and the ionizing module are located in the electrostatic disinfecting and dust removing duct housing 105. The electrostatic filter screen 101 includes a frame portion and at least one layer of mesh structure, which may be mesh structure in various suitable manners, such as a cross-bar mesh structure, a vertical-bar mesh structure, a diamond mesh structure, and the like. The electrostatic filter screen 101 is installed at the front end of the electrostatic disinfecting and dust removing duct housing 105 to filter particles. The ionization module at least comprises an anode plate and a cathode plate, wherein the anode plate and the cathode plate are respectively positioned at two opposite sides of the electrostatic filter screen 101, namely the side part of the electrostatic disinfection and dust removal air duct shell 105, so that the electrostatic filter screen adsorbs particles in the air by emitting static electricity. The ionization module is used for carrying out ionization treatment to the gas (also the gas through electrostatic filter) through the ionization module, under the effect of electric field force, the gas ion of taking the negative charge moves to the anode plate, collide with dust particle in the motion for dust particle is the negative charge, the dust particle after the electric charge is under the effect of electric field force, also move to the anode, wherein, the high-voltage electrostatic voltage that the ionization module can adopt can set for more than 5000 volts, of course also can be other voltages, as long as can realize making dust particle by electrostatic absorption can. Thereby, dust particles can be collected by the electrostatic filter screen. In order to adsorb more and more dust particles, two or more electrostatic filter screens may be provided, and the two or more electrostatic filter screens may be the same or different, for example, one of the electrostatic filter screens is a horizontal bar mesh structure, and the other electrostatic filter screen is a diamond mesh structure. The ionization module may further include a dust collection section located at a rear portion of the electrostatic filter screen so that dust falls on the dust collection section after passing through the ionization module to perform collection of dust particles, so that the purified gas can be discharged.
The wind resistance of the electrostatic disinfecting and dust removing apparatus 11 according to the embodiment of the present invention may be 10-30pa, the interception level of the particulate matters against the dust and the viruses attached thereto is about 0.05-0.3 μm, and it is also possible to intercept larger or smaller particulate matters, and the purifying efficiency thereof may reach 80-96%. For example, when the interception level of particulate matters aiming at dust and viruses attached to the dust is 0.25 micron (namely PM2.5 particulate matters and aerosol), more than 90 percent of PM2.5 particulate matters in the air and instant killing of virus and bacteria can be realized, for example, the purification efficiency can reach 92.9 percent, and the wind resistance is only 19.1pa, and the ozone generation amount in the case is very low and is about 0.002 g/h. The intercepting efficiency of the particles with the particle size of more than 0.1 micrometer can reach 83.3 percent, and the wind resistance is only 20 pa. The electrostatic filter 101 includes at least one of a HEPA filter, an activated carbon filter, and a formaldehyde filter. According to the mode of the invention, the cleaning period of the electrostatic filter screen can reach 2 years or 3 years, and the power consumption used by the ionization module is very low, and can be only dozens of watts, for example, can be only 30W.
The electrostatic disinfection and dust removal air duct housing 105 also includes a maintenance door 103 for the electrostatic filter screen on the side to facilitate periodic removal of the electrostatic filter screen and/or dust collection section for cleaning, without consumables, and for repair and maintenance of other components. The electrostatic disinfection and dust removal device only needs to be cleaned without replacement, and the cleaning period is once every 6-12 months.
The electrostatic dust removal technology is adopted as the first defense line of the device, the advantages of high efficiency, low wind resistance, low maintenance cost and the like of the electrostatic dust removal technology are fully exerted, and the defects of the electrostatic dust removal technology that the capture rate is reduced and ozone is generated along with the increase of the service time can be compensated by the last two defense lines.
The air duct 10 for disinfection, sterilization and dust removal further comprises a second section of ultraviolet sterilization device located at the rear part of the electrostatic disinfection and dust removal device, because the ultraviolet wavelength is short, the physical and chemical structures on the surface of an object can be damaged, and the speed of ultraviolet sterilization depends on the ultraviolet wavelength and the radiation intensity, so when the radiation intensity of ultraviolet is enough, the instantaneous sterilization of viruses and bacteria can be realized.
The ultraviolet sterilization device comprises: the ultraviolet sterilization air channel comprises an ultraviolet sterilization air channel shell, an ultraviolet lamp and a flow guide device optionally assembled on the shell, wherein the ultraviolet lamp is positioned in the middle of the ultraviolet sterilization device, and after air enters the ultraviolet sterilization air channel shell (also called an ultraviolet sterilization bin and a sterilization bin), the air is gathered to ultraviolet lamplight by the flow guide device, so that an air main body flowing through the ultraviolet sterilization bin passes through the ultraviolet lamp tube in a radius range of 100mm around the ultraviolet lamp tube; in addition, the ultraviolet disinfection cabin can be made of mirror surface stainless steel.
The ultraviolet sterilization apparatus 21 according to the embodiment of the present invention includes at least one ultraviolet lamp 201, and the ultraviolet lamp 201 is located in the ultraviolet sterilization duct housing 209, that is, the sterilization chamber, and in the case that there is only one ultraviolet lamp, it is preferably located at a central axial portion of the sterilization chamber. The advantage of locating the position of the ultraviolet radiation emission of the ultraviolet lamps at the central axis of the disinfection chamber is that an equidistant high intensity radiation disinfection can be met as far as possible. Of course, the ultraviolet sterilization device according to the present invention may also comprise a plurality of ultraviolet lamps, which may be respectively located at both sides of the central axis and the central axis of the sterilization chamber, or arranged around the central axis, or located at other suitable positions, as long as high intensity radiation sterilization can be achieved. For example, three ultraviolet lamps may be provided, one at the central axis of the disinfection chamber and one on each side of the central axis, to better sterilize the air flowing through the disinfection chamber.
The ultraviolet sterilization device in the air duct 10 for sterilization according to the present invention employs an ultraviolet lamp with a wavelength of 250-260nm, preferably an ultraviolet lamp 201 with a wavelength of 254nm, which has the strongest sterilization power, and is also called an ultraviolet lamp tube, and the surface radiation intensity of the ultraviolet lamp is 41-45mW/cm2E.g. 43mW/cm2The power is 140-155W, such as 150W, but may be other suitable powers, and may be selected according to the requirement. Under the condition of power of 150W, the radiation intensity at a position 10cm away from the ultraviolet lamp can reach 5.9mW/cm2Above, the radiation intensity at a distance of 25cm from the ultraviolet lamp may be more than 2mW/cm2Which is the national standard (17.5. mu.W/cm)2) About 114 times of the ultraviolet radiation, and the intensity of the ultraviolet radiation at the lowest point is not lower than 1 milliwatt, thereby achieving the effect that the virus and bacteria can be killed instantly once being radiated, and the killing rate is more than 99.99 percent.
The wind resistance in the disinfection silo is relatively small, for example less than 10 pa. Since the wind speed in the disinfection chamber is about 2-5m/s, it is necessary to achieve sterilization in a very short time of 0.2-0.5 seconds. In order to achieve the purpose, the inner walls of the periphery of the disinfection bin are made of mirror reflection materials, so that the inner side of the disinfection bin is a mirror surface. When air passes through the ultraviolet disinfection bin, viruses and bacteria contained in the air are radiated by the ultraviolet lamp tubes in a close-distance strong direct connection mode and ultraviolet radiation reflected by the inner wall of the full-dimensional air channel, ultraviolet rays emitted by the ultraviolet light source are reflected after being irradiated to the four walls, and can be reflected for multiple times on the four walls, so that the air flow passing through the disinfection bin is irradiated by the ultraviolet rays to the maximum extent, a high-intensity full-dimensional radiation disinfection effect is formed, and the viruses and the bacteria are killed instantly. Under the irradiation of ultraviolet rays in a large range and at multiple angles, the bacteria and viruses in the way are not in a radiation disinfection state of 360 degrees and no dead angle anytime and anywhere in the process of passing through the disinfection bin.
In addition, optionally, an ultraviolet air inlet guide plate 203 is installed near the air inlet of the disinfection cabin, and the ultraviolet air inlet guide plate 203 can decelerate and guide the air passing through the disinfection cabin, so that all the passing air can pass through the position which is 10-15cm away from the light source and has the strongest killing force, and the weak radiation phenomenon in the cabin body is avoided. By utilizing the ultraviolet air inlet guide plate 203, the air body flowing through the ultraviolet disinfection cabin can almost completely pass through the ultraviolet lamp within the radius range of 90-110mm around the periphery, even can pass through the ultraviolet lamp within the radius range of about 100mm, so as to realize stronger radiation of ultraviolet rays at a closer distance.
In view of the limited life of the uv lamp, which needs to be replaced periodically and thus the state of the uv lamp needs to be observed periodically, the middle side of the air duct housing 10 is provided with an observation window 205 and a uv lamp tube side maintenance door 207 for observing and replacing the uv lamp tube. Under normal use conditions, the life of the ultraviolet lamp 201 can reach 10000-. The disinfection chamber is provided with an observation window 205 in a manner of visually leading out the observation port, the observation window 205 can be made of, for example, tempered glass, and is coated with a fluorescent coating, ultraviolet rays can be converted into visible light after being irradiated on the fluorescent coating, and the observation of the visible light through the observation window 205 indicates that the ultraviolet sterilization device is in normal operation. Preferably, the ultraviolet rays are changed into visible light through the fluorescent coating of the outlet, and are reflected downwards to be led out, so that the maintenance personnel can observe the working state on the ground. If the visible light cannot be observed through the observation window 205, it indicates that the ultraviolet sterilization apparatus may malfunction and need to be repaired.
The advantages of using ultraviolet light in the disinfection of air ducts are obvious, including extremely low wind resistance, very little escape of viruses which are not completely inactivated, and the like.
The sterilizing air duct 10 according to the present invention further includes a third stage chemical filtering device located at the rear of the ultraviolet sterilizing device. The chemical filtering device 31 according to an embodiment of the present invention includes a chemical filtering air duct housing and at least one chemical filtering screen, and optionally a flow disturbing device mounted in the chemical filtering air duct housing. The flow disturbing device forms two colliding air flows before the air passes through the chemical filter screen so as to achieve the optimal killing effect. The chemical filter screen is formed by a filter material and a filter screen together, the chemical filter screen is a contact type killing mode, and virus and bacteria in the air are killed in the process of contacting the chemical filter material.
The chemical filtering device 31 according to an embodiment of the present invention includes a chemical filtering screen 301 and a chemical filtering duct housing 307 which are formed by a filtering material and a filtering screen together. The chemical filter 301 may be in the form of a diamond, cross-bar or vertical bar filter. The chemical filtering device 31 is located in the chemical filtering duct housing 307 to eliminate harmful substances. The filtering material used in the chemical filtering device 31 is preferably filtering material particles synthesized by special inorganic materials, such as activated carbon filtering material with manganese oxide catalyst, or any other suitable filtering material particles synthesized by inorganic materials, and the synthesized filtering material may also be added with inorganic materials with the capability of eliminating other chemical substances such as ozone, sulfur, etc. The filter material particles and the filter screen are structurally combined to form a chemical filter screen together, so that air flowing through the chemical filter device is bent and passes through the chemical filter device, and bacteria and viruses carried by the air are killed when contacting the filter material. The chemical filter 301 also oxidizes and reduces ozone in the air, so as to reduce the ozone, and achieve an ozone interception rate of about 90%. For more and complete elimination of viruses, bacteria, chemicals such as ozone, etc., two or more chemical filters may be provided, and the two or more chemical filters may be the same or different, for example, one of the chemical filters is a horizontal strip net structure and the other chemical filter is a diamond net structure. The chemical filtering device 31 also serves as a final mechanical sterilizing device to ensure that virus and bacteria passing through the air duct can be eliminated and particles escaping from the electrostatic sterilizing device can be intercepted under the condition that the first two sterilizing functions are failed, so that the aim of eliminating harmful gas and substances is fulfilled.
A chemical filter material guide plate 303 is installed near the rear part of the sterilizing chamber and the front part of the air inlet of the chemical filter device 31 to guide the air passing through the chemical filter device 31. Lower windage, e.g., less than 20pa, can be achieved with the chemical filtration device of the present invention. The purpose of arranging the chemical filter material guide plate 303 at the front of the air inlet section of the chemical filter is to prevent air from directly passing through the chemical filter screen, but to allow the air to enter obliquely, so that the air speed is reduced. The air passes through the chemical filter screen in a disordered manner after being repeatedly turned in the chemical filter screen, and the track of the air passing through the chemical filter screen is prolonged, so that the aim of killing bacteria and viruses and removing ozone is fulfilled by ensuring that the air flowing through the chemical filter screen contacts the chemical filter material to the maximum extent. The chemical filtering device has the advantage that the disinfection and killing rate is as high as more than 98%.
In addition, a chemical filter screen side maintenance door 305 is provided at a side of the rear portion of the sterilizing air duct to facilitate periodic replacement and maintenance of the chemical filter screen of the chemical filter device. Under normal use conditions, the service life of the chemical filter screen 301 can reach 6-12 months, and the total maintenance period is 6-12 months, which is much shorter than the air filtration mode, so that the chemical filter screen can be replaced periodically according to the service life.
The air duct for disinfection, sterilization and dust removal adopts a low wind resistance design, and the three-section combined wind resistance is less than 50pa, is only equivalent to a coarse filter, and is suitable for the reconstruction of various newly-built systems and stock systems.
The electrostatic disinfection and dust removal device, the ultraviolet sterilization device and the chemical filter device can be installed in the existing air ducts of the existing fresh air system, the central air-conditioning system and the like, and the air duct shell at the moment can be the existing air duct of the installed system, can also be an air duct additionally installed on the system to be installed, and can also be the air duct of the system to be installed. The invention can realize the combined disinfection and killing of the air flowing through the air duct to block viruses and bacteria and realize the disinfection and sterilization effect on large public spaces.
The air duct for disinfection and sterilization according to the invention can have the complementary advantage of successive combined killing, firstly, the three-stage killing technology ensures that the infinite approach to 100% of virus and bacteria killing results, and any one stage of the air duct has a fault without influencing the killing effect, does not need to be stopped for maintenance immediately, and only needs to replace or repair the required parts for repair and maintenance by using a maintenance door. Thus, the air duct does not need to be cleaned frequently and has a long service life. The air duct has very low wind resistance, and the wind resistance in the whole air duct is lower than 50 pa. Therefore, the air duct is suitable for being modified in the existing air duct, and the existing old unit and the air duct are modified to realize the three-level disinfection, such as modifying the unit designed according to primary effect or intermediate effect filtration. The air channel for disinfection and sterilization can also be used for blocking and sterilizing bacteria, viruses and dust particles at one time, and ozone generated by electrostatic filtration can be removed by chemical filtration. Meanwhile, the first-stage electrostatic filtration can avoid the worries of the surface dust accumulation of the second-stage ultraviolet disinfection and the third-stage chemical filtration device, can keep the cleanness of the system and reduce the workload of cleaning and maintenance. In addition, the comprehensive wind resistance is low, so that the quick refrigeration and heating are facilitated, the energy consumption is greatly reduced, and the energy conservation and emission reduction are realized.
The term "comprising" as used in this specification means "at least partially comprising". In interpreting each statement in this specification that includes the word "comprising", features may also be present in addition to or in addition to the word. Related terms such as "include" and "include" should be interpreted in the same manner.
Many changes in construction and widely differing embodiments and applications of the invention will become apparent to those skilled in the art to which the invention pertains without departing from the scope of the invention as defined in the appended claims. The disclosures and the descriptions herein are purely illustrative and are not intended to be in any sense limiting. Where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.
As used herein, the term "and/or" means "and" or both.
Reference to a range of numbers disclosed herein (e.g., 1 to 10) also includes reference to all reasonable numbers within that range (e.g., 1, 1.1, 2, 3, 3.9, 4, 5, 6, 6.5, 7, 8, 9, and 10) and any rational number range within that range (e.g., 2 to 8, 1.5 to 5.5, and 3.1 to 4.7), and thus, all subranges of all ranges are explicitly disclosed herein. These are only examples of what is specifically intended, and all possible combinations of numerical values between the minimum and maximum values recited should be considered to be expressly stated in this application in a similar manner.
In the description of this specification, reference may be made to subject matter that is not within the scope of the appended claims. This subject matter should be readily recognized by those skilled in the art and may be helpful in putting the invention into practice as defined in the appended claims. .
Although the invention is generally defined as above, it will be understood by those skilled in the art that the invention is not limited thereto and that the invention also includes embodiments exemplified by the following examples.
The foregoing description of the invention includes preferred forms thereof. Modifications may be made thereto without departing from the scope of the invention.

Claims (16)

1. A method for sterilizing, disinfecting and dedusting an air duct, comprising:
filtering the air in the air duct by using an electrostatic filtering mode;
sterilizing the air which is filtered by static electricity in the air duct by using an ultraviolet radiation mode;
the air in the air duct that has been electrostatically filtered and has been subjected to ultraviolet sterilization is further sterilized using a chemical filter material.
2. The method of claim 1, wherein the electrostatic filtering comprises generating static electricity using anode and cathode plates of the ionization module located at opposite sides of the electrostatic filter, such that the electrostatic filter and/or a dust collection section located at a rear of the ionization module adsorbs the particulate matter in the air.
3. The method of claim 1 or 2, wherein the ultraviolet radiation comprises ultraviolet light for disinfection of air flowing through the air chute by disinfection from ultraviolet light from ultraviolet lamps in the air chute.
4. A method according to claim 3, wherein the uv light is at least partially reflected by the inner walls of the tunnel and/or the air passes around the uv lamp within a radius of 90-110 mm.
5. The method of claim 1 or claim 2, wherein the chemical filter material is applied to a chemical filter screen through which air in the air duct flows to contact the chemical filter material, thereby disinfecting the air flowing through the air duct.
6. Use of the method according to any one of claims 1-5 in an air duct.
7. Air duct of disinfection sterilization dust removal, its characterized in that, the air duct includes:
the electrostatic disinfection and dust removal device comprises an electrostatic disinfection and dust removal air channel shell, an electrostatic filter screen and an ionization module, wherein the electrostatic filter screen is arranged in the electrostatic disinfection and dust removal air channel shell to filter particles, the ionization module at least comprises an anode plate and a cathode plate, and the anode plate and the cathode plate are respectively positioned at two opposite sides of the electrostatic filter screen to enable the electrostatic filter screen to adsorb the particles by emitting static electricity;
at least one ultraviolet sterilizing device coupled with the at least one electrostatic sterilizing and dust removing device, wherein the ultraviolet sterilizing device comprises an ultraviolet sterilizing air channel shell and at least one ultraviolet lamp, and the ultraviolet lamp is arranged in the ultraviolet sterilizing air channel shell to emit ultraviolet rays for sterilization;
the chemical filtering device comprises a chemical filtering air duct shell and a chemical filtering screen formed by a filtering material and the filtering screen together, and the chemical filtering device is positioned in the chemical filtering air duct shell to eliminate harmful substances.
8. The air duct for disinfection, sterilization and dust removal according to claim 7, wherein the wind resistance at the electrostatic disinfection and dust removal device is 10-30 pa.
9. The air duct for sterilizing, disinfecting and dedusting as claimed in claim 7 or 8, wherein the ionizing module further comprises a dust collecting section located at the rear of the electrostatic filtering net to collect dust passing through the anode plate and the cathode plate.
10. The sterilizing and dust removing air duct of claim 7 or 8, wherein ultraviolet lamps are positioned at the central axis c of the ultraviolet sterilizing air duct housing and/or on both sides of the central axis.
11. The air duct for disinfection, sterilization and dust removal according to claim 7 or 8, wherein the inner wall of the periphery of the ultraviolet sterilization air duct shell is made of a specular reflection material.
12. The air duct for disinfection, sterilization and dust removal according to claim 7 or 8, wherein the ultraviolet sterilization device further comprises an ultraviolet air intake guide plate installed near the air intake of the ultraviolet sterilization air duct housing for guiding the air passing through the ultraviolet air intake guide plate.
13. The air duct for disinfection, sterilization and dust removal according to claim 7 or 8, wherein the chemical filter device further comprises a chemical filter material guide plate, and the chemical filter material guide plate is installed at the rear part of the inner side of the ultraviolet disinfection air duct shell and near the front part of the air inlet of the chemical filter device so as to guide the air passing through the chemical filter material guide plate.
14. The air duct according to claim 7 or 8, wherein the electrostatic disinfection, sterilization and dust removal air duct housing further comprises a maintenance door for electrostatic filter screen located at the side of the electrostatic disinfection, dust removal air duct housing, the ultraviolet disinfection and dust removal air duct housing further comprises an observation window and an ultraviolet lamp side maintenance door located at the side of the ultraviolet disinfection and dust removal air duct housing, and/or the chemical filtration air duct housing further comprises a chemical filter screen side maintenance door located at the side of the chemical filtration air duct housing.
15. A fresh air system comprising a sterilizing and dedusting air duct as claimed in any one of claims 7 to 14, wherein the air duct is positioned in or attached to a return air section or an air supply section capable of bearing wind resistance of the fresh air system.
16. A central air-conditioning system comprising a sterilizing and dedusting air duct according to any one of claims 7-14, wherein the air duct is positioned in or attached to a return air section or a supply air section capable of bearing wind resistance of the central air-conditioning system.
CN202010509450.9A 2020-06-01 2020-06-01 Method for disinfecting, sterilizing and dedusting air duct, application, air duct, fresh air system and central air conditioning system Pending CN113757832A (en)

Priority Applications (1)

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CN202010509450.9A CN113757832A (en) 2020-06-01 2020-06-01 Method for disinfecting, sterilizing and dedusting air duct, application, air duct, fresh air system and central air conditioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010509450.9A CN113757832A (en) 2020-06-01 2020-06-01 Method for disinfecting, sterilizing and dedusting air duct, application, air duct, fresh air system and central air conditioning system

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CN113757832A true CN113757832A (en) 2021-12-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114941875A (en) * 2022-06-30 2022-08-26 上海戎和实业有限公司 Electronic purification virus killing equipment for central air conditioner
CN116538613A (en) * 2023-05-08 2023-08-04 才展照明（深圳）有限公司 Energy-saving air conditioner pipeline adopting deep ultraviolet disinfection mode

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114941875A (en) * 2022-06-30 2022-08-26 上海戎和实业有限公司 Electronic purification virus killing equipment for central air conditioner
CN116538613A (en) * 2023-05-08 2023-08-04 才展照明（深圳）有限公司 Energy-saving air conditioner pipeline adopting deep ultraviolet disinfection mode

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