CN111467956A - Modified nano titanium dioxide photocatalyst oral cavity examination room droplet and aerosol suction device - Google Patents
Modified nano titanium dioxide photocatalyst oral cavity examination room droplet and aerosol suction device Download PDFInfo
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Abstract
A modified nano titanium dioxide photocatalyst oral cavity diagnosis room droplet and aerosol suction device comprises an air suction mask, a box body, a droplet, aerosol filtering and pathogen killing device, a negative pressure suction system and a liquid discharge system; a separating mechanism is arranged in the box body, a droplet, aerosol filtering and pathogen killing device is arranged in the upper cavity, and a negative pressure suction system and a liquid discharge system are arranged in the lower cavity; the air suction mask is connected with an air inlet positioned in the upper cavity of the box body through a connecting pipe; the air suction mask is used for sucking the droplets and the aerosol into a cavity at the upper part of the box body, and the droplets and the aerosol enter a droplet, aerosol filtering and pathogen killing device through a negative pressure suction system so as to kill bacteria or virus microorganisms contained in the droplets and the aerosol; liquid pollutants generated by condensation of the spray and the aerosol in the filtering process are collected through a drainage system. The invention avoids the defects of single function, simple structure and incapability of sterilizing and disinfecting of the traditional oral cavity suction machine.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a modified nano titanium dioxide photocatalyst oral cavity examination room droplet and aerosol suction device.
Background
In the clinical operation process of the oral cavity consulting room, a plurality of patients are diagnosed and treated, and power instruments such as ultrasonic equipment, a high-speed mobile phone, a turbine, a three-purpose gun and the like are frequently used. Since most oral clinical procedures are performed in the mouth of a patient, the oral powered devices are in direct contact with the patient's saliva and blood, and therefore, these powered devices generate a large amount of airborne aerosols and aerosols that may contain microorganisms such as bacteria or viruses when rotated at high speeds. It has been found that the contamination of aerosols, which are a dispersion of solid or liquid particles suspended in a gaseous medium for a prolonged period of time, varies from 0.001 μm to 100 μm in a closed oral office can range almost entirely. If a patient carries 2019 novel coronavirus (2019-nCoV), SARS coronavirus, influenza virus, rhinovirus, Hepatitis B Virus (HBV), AIDS virus (HIV), cytomegalovirus, herpes virus, bacillus conjugalis and the like, spray or aerosol generated by a power device can become a direct carrier of the virus or bacteria in the oral treatment process, large-particle-size splash particles containing the virus or bacteria are settled on the body surfaces, operation table surfaces or the ground of medical staff and the patient, and aerosol containing pathogens can suspend in the air for a long time, so that the concentration of the pathogens in a local space is increased and enlarged, and the risk of infection is increased, thereby seriously harming the health of the medical staff and the patient. Particularly, during epidemic period of the infectious pneumonia caused by the novel coronavirus in 2020, 1 in the middle of ten days to 3 in 2019, the spreading and aggravation of epidemic situation can be caused by aerosol and spray generated by power equipment in an oral diagnosis room, and oral hospitals or oral clinics all over the country adopt large-area diagnosis stopping measures according to the instruction of superior health departments to block the spreading of the epidemic situation, so that great inconvenience is brought to patients suffering from oral diseases, and the delay of the disease condition of the patients is caused.
Therefore, the powerful spray and aerosol suction device arranged in the oral cavity diagnosis room is used for sucking and filtering pollution spray and aerosol generated during oral cavity diagnosis and treatment operation and killing pathogenic microorganisms in the spray and the aerosol, and the powerful spray and aerosol suction device is an effective solution which can ensure the normal operation of oral cavity diagnosis and treatment, control infection in an oral cavity diagnosis room and maintain the health of medical staff and patients.
However, the traditional extraoral suction machine only performs suction, filtration and purification treatment on dust generated during oral operation, has relatively single and simple function, has good dust collection effect, but does not have filtration effect on the droplets generated by the oral power apparatus and virus and bacteria carried on aerosol, and cannot kill the virus and bacteria. The sucked air and the contained pathogens can be directly discharged into the examination room again through the exhaust device of the suction machine, so that secondary air pollution of the examination room is caused. Meanwhile, a part of pathogenic microorganisms can be accumulated in a filter screen of the traditional extraoral suction machine, and potential threats are caused to patients. In summary, the existing extraoral suction machine has little effect on treating the microorganisms in the air of the oral consulting room. Moreover, due to long-term use, foreign particles are accumulated in the filtering device for a long time, so that the filtering efficiency is easily reduced, if the filtering device is frequently replaced, the operation is relatively complicated, the material cost is increased, and the risk of reinfection of medical workers is invisibly increased by the inactivated pathogenic microorganisms accumulated in the machine body in the replacement process.
In addition, the traditional extraoral suction machine has higher noise, and when a plurality of suction machines in the same consulting room operate simultaneously, the generated noise greatly harms the hearing health of medical personnel and patients, and the comfort level of the diagnosing environment is also reduced.
The nanometer titania photocatalyst material is one kind of optical semiconductor material with photocatalytic function, and can produce hydroxyl radical with very strong oxidizing capacity under the action of ultraviolet light to degrade organic matter and inorganic matter strongly and to kill pathogenic microbe, so that the photocatalytic technology with nanometer titania carrier is used successfully in waste water treatment, air purification, self-cleaning surface, dye sensitized solar cell, antibiotic and other fields. However, the application of the nano titanium dioxide to the oral cavity office suction machine is not available at present.
Disclosure of Invention
The invention overcomes the defects of the traditional oral cavity external suction machine, provides a modified nano titanium dioxide photocatalyst oral cavity diagnosis room droplet and aerosol suction device with the sterilization and disinfection functions, has more comprehensive purification function, can powerfully and immediately collect the droplet and the aerosol containing pathogenic microorganisms generated in the oral cavity diagnosis and treatment process, effectively prevents the diffusion of the droplet and the aerosol, and performs sterilization and disinfection on the inhaled droplet and the aerosol through the modified nano titanium dioxide photocatalyst microbial filtration device, greatly improves the sterilization efficiency and the sterilization effect of the oral cavity air suction device, effectively controls the pathogen content in the air of the oral cavity diagnosis room, effectively blocks the transmission path of infectious diseases through the droplet and the aerosol, and reduces the air pollution caused by pathogenic microorganisms transmitted through the droplet and the aerosol, the oral cavity examination room is ensured to be clean, the health of medical staff and patients is maintained, and the defects that the traditional oral cavity suction machine has single function and simple structure and can not sterilize and disinfect are avoided, so that the normal operation of oral cavity diagnosis and treatment activities in epidemic situations is ensured.
The invention is realized according to the following technical scheme:
a modified nano titanium dioxide photocatalyst oral cavity diagnosis room droplet and aerosol suction device comprises an air suction mask, a box body, a droplet, aerosol filtering and pathogen killing device, a negative pressure suction system and a liquid discharge system; the interior of the box body is provided with a separation mechanism, the upper cavity is internally provided with the droplet, aerosol filtering and pathogen killing device, and the lower cavity is internally provided with a negative pressure suction system and a liquid discharge system; the air suction mask is connected with an air inlet positioned in the upper cavity of the box body through a connecting pipe; the air suction mask is used for sucking the droplets and the aerosol into a cavity at the upper part of the box body, and the droplets and the aerosol enter a droplet, aerosol filtering and pathogen killing device through a negative pressure suction system so as to kill bacteria or virus microorganisms contained in the droplets and the aerosol; liquid pollutants generated by condensation of the spray and the aerosol in the filtering process are collected through a drainage system.
Furthermore, the device for filtering the spray and the aerosol and killing the pathogen is sequentially arranged from the air inlet at intervals into an activated carbon fiber large particle adsorption and filtration device, a front UV lamp, a front modified nano titanium dioxide photocatalyst composite glass fiber filtration device, a polyethylene fiber non-woven fabric filtration device, a rear UV lamp and a rear modified nano titanium dioxide photocatalyst composite glass fiber filtration device.
Furthermore, the titanium dioxide contained in the modified nano titanium dioxide photocatalyst composite glass fiber filtering device is modified nano titanium dioxide, and oxygen vacancies are introduced into the crystal lattices of the nano titanium dioxide, so that the forbidden bandwidth of the nano titanium dioxide is narrowed, and the photocatalytic rate and the light utilization rate are improved; and the modified nano titanium dioxide photocatalyst composite glass fiber filtering device is prepared by compounding modified nano titanium dioxide-cobalt oxide sol and a glass fiber material, and can quickly catalyze and degrade harmful pathogens.
Furthermore, the UV lamp is an annular lamp source, so that the irradiation area of UV is increased, and the response of the nano titanium dioxide photocatalyst to light is increased.
Furthermore, the interval between the activated carbon fiber large particle adsorption and filtration device, the preposed UV lamp, the preposed modified nano titanium dioxide photocatalyst composite glass fiber filtration device, the polyethylene fiber non-woven fabric filtration device, the postpositive UV lamp and the postpositive modified nano titanium dioxide photocatalyst composite glass fiber filtration device is about 4 cm-6 cm.
Further, the liquid drainage system comprises a liquid drainage pipeline and a liquid collection tank; the collecting tank is arranged on the bottom surface of the chamber at the lower part of the box body, the inlet end of the liquid discharge pipeline is arranged at the opening of the separating mechanism, and the outlet end of the liquid discharge pipeline is connected with the collecting tank.
Further, the negative pressure suction system comprises a vacuum pump motor, a turbine fan and a silencing system; the vacuum pump motor and the turbine fan are arranged in a cavity at the lower part of the box body and are close to the exhaust port; the noise reduction of the vacuum pump motor is realized through a silencing system.
Further, the air suction mask adopts a bell mouth-shaped mask, and the connecting pipe is a movable hollow connecting pipe; the movable hollow connecting pipe is composed of a plurality of hollow pipes which are connected with each other, a rotating part is installed at the joint of the two adjacent hollow pipes, and the free rotation of the hollow pipes is realized through the rotating part, so that the positions of the hollow pipes and the horn mouth-shaped mask in a consulting room are adjusted.
Furthermore, the outer wall of the box body is made of an antibacterial material, the direction of an air inlet of the box body is perpendicular to the droplet and aerosol filtering and pathogen killing device, the bottom of the box body is provided with a movable base roller, and the outer wall of the box body is provided with a UV lamp power supply controller.
The invention has the beneficial effects that:
the invention relates to a powerful suction and filtration device for a large amount of spray and aerosol generated by an oral cavity power device in high-speed rotation, which can powerfully suck the spray and the aerosol generated by the oral cavity power device, can efficiently kill microorganisms such as bacteria or viruses contained in the spray and the aerosol, can be used together with the oral cavity power device, and can prevent the transmission of infectious diseases in an oral cavity diagnosis room through the spray and the aerosol.
In conclusion, the advantages are as follows:
1. a trumpet-shaped air suction mask is connected with the movable hollow connecting pipe and can be detachably replaced.
2. The device is provided with a preposed modified nano titanium dioxide photocatalyst composite glass fiber filtering device and a postposition modified nano titanium dioxide photocatalyst composite glass fiber filtering device (pathogen filtering device), and oxygen vacancies are introduced into nano titanium dioxide crystal lattices, so that the nano titanium dioxide is modified, the forbidden bandwidth is narrowed, and the photocatalytic rate and the light utilization rate are improved.
3. The pathogen filtering device is made by compounding modified nano titanium dioxide-cobalt oxide sol and glass fiber materials, has high transparency and stable property, can quickly catalyze and degrade harmful pathogens contained in inhaled spray and aerosol, plays a role in effectively killing pathogenic microorganisms, controls the content of bacteria and viruses in the air of an oral diagnosis room, reduces the air pollution in the diagnosis room, reduces the risk of spreading infectious diseases through the spray and the aerosol, provides a safe diagnosis environment, and effectively protects the health of medical staff and patients.
And 4, the UV lamp is an annular lamp source, so that the irradiation area of UV is increased, and the light irradiation of the nano titanium dioxide photocatalyst is correspondingly increased.
5. The filter device is provided with a classification consideration, and from large-particle pollutants to small-particle pollutants, the filter device performs classification filtration, so that the defect that the utilization rate of the photocatalyst is low due to the aggregation and the wrapping of low-toxicity large-particle pollutants of the nano titanium dioxide is reduced, and the purification effect of sucked polluted air is improved.
6. The silencing system is added in the strong negative pressure suction system, so that the noise is obviously reduced, the environment of the oral cavity examination room is quieter, and the examination comfort of a patient is improved.
7. The lower end of the internal separation structure of the box body is additionally provided with a liquid discharge pipeline and is connected with a liquid collection tank below the internal part of the box body. Can effectively collect and clean liquid pollutants generated by condensation of the spray and the aerosol in the filtering process.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. The present invention will be described in detail below with reference to the accompanying drawings and examples.
FIG. 1 is a first drawing of the overall structure of a modified nano-titania photocatalyst oral cavity examination room droplet and aerosol suction device according to the present invention;
FIG. 2 is a second overall structure diagram of the modified nano titanium dioxide photocatalyst oral cavity spray and aerosol suction device of the present invention;
FIG. 3 is a third overall structure diagram of the modified nano titanium dioxide photocatalyst oral cavity spray and aerosol suction device of the present invention;
FIG. 4 is a cross-sectional view of the case of the present invention;
FIG. 5 is a schematic view of a ring UV lamp distribution.
The labels in the figure are: 10-air suction mask, 20-box body, 30-activated carbon fiber large particle adsorption filtering device, 40-preposed UV lamp, 50-preposed modified nano titanium dioxide photocatalyst composite glass fiber filtering device, 60-polyethylene fiber non-woven fabric filtering device, 70-postpositive UV lamp, 80-postpositive modified nano titanium dioxide photocatalyst composite glass fiber filtering device, 90-liquid discharge pipeline, 100-liquid collecting tank, 110-vacuum pump motor, 120-turbine fan, 130-sound reduction system, 140-connecting pipe, 150-UV lamp power supply controller, 160-air inlet, 170-air outlet.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. 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. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the modified nano titanium dioxide photocatalyst oral office spray and aerosol suction device comprises an air suction mask 10, a box body 20, a spray, aerosol filtering and pathogen killing device, a negative pressure suction system and a liquid discharge system; a separation mechanism is arranged in the box body 20, a droplet, aerosol filtering and pathogen killing device is arranged in the upper cavity, and a negative pressure suction system and a liquid discharge system are arranged in the lower cavity; the air suction mask 10 is connected to an air inlet 160 provided in an upper chamber of the body 20 through a connection pipe 140; the air suction mask 10 strongly sucks the droplets and the aerosol into a cavity at the upper part of the box body 20, and the droplets and the aerosol enter a droplet, aerosol filtering and pathogen killing device through a negative pressure suction system so as to kill bacteria or virus microorganisms contained in the droplets and the aerosol; liquid pollutants generated by condensation of the spray and the aerosol in the filtering process are collected through a drainage system.
A preferred embodiment of the above embodiment is given below with respect to the spray, aerosol filtration and pathogen killing device:
the device for filtering the spray and the aerosol and killing the pathogen is sequentially arranged from the air inlet at intervals as an activated carbon fiber large particle adsorption filtering device 30, a preposed UV lamp 40, a preposed modified nano titanium dioxide photocatalyst composite glass fiber filtering device (pathogen filtering device) 50, a polyethylene fiber non-woven fabric filtering device (HEPA filter) 60, a postposition UV lamp 70 and a postposition modified nano titanium dioxide photocatalyst composite glass fiber filtering device (pathogen filtering device) 80.
Further scheme: the titanium dioxide contained in the modified nano titanium dioxide photocatalyst composite glass fiber filtering device is modified nano titanium dioxide, and oxygen vacancies are introduced into the crystal lattices of the nano titanium dioxide, so that the forbidden bandwidth of the nano titanium dioxide is narrowed, and the photocatalytic rate and the light utilization rate are improved; and the modified nano titanium dioxide photocatalyst composite glass fiber filtering device is prepared by compounding modified nano titanium dioxide-cobalt oxide sol and a glass fiber material, and can quickly catalyze and degrade harmful pathogens.
Further scheme: the UV lamp is an annular lamp source, so that the irradiation area of UV is increased, and the response of the nano titanium dioxide photocatalyst to light is increased.
The preferred scheme is as follows: activated carbon fiber large particle adsorption and filtration device 30, preposed UV lamp 40, preposed modified nano titanium dioxide photocatalyst composite glass fiber filtration device 50, polyethylene fiber non-woven fabric filtration device 60, postpositive UV lamp 70, and postpositive modified nano titanium dioxide photocatalyst composite glass fiber filtration device 80 are spaced by about 4 cm-6 cm.
It is noted that the modified nano titanium dioxide photocatalyst material used in the present invention introduces oxygen vacancy into the crystal lattice of the common nano titanium dioxide, so as to narrow the forbidden bandwidth of the nano titanium dioxide, improve the redox capability thereof, and improve the photocatalytic rate and the light utilization rate thereof. The modified nano titanium dioxide has the advantages of good hydrophilicity, high stability, no secondary pollution and the like, is easy to adsorb spray and aerosol, can strongly catalyze and degrade organic matters and inorganic matters and kill pathogenic microorganisms, obviously enhances the antibacterial and antiviral functions of the oral suction machine, and fully purifies the polluted air sucked by the oral suction machine.
Different from the traditional photocatalyst carrier which generally adopts a metal substrate or a PVC plate, the modified nano titanium dioxide photocatalyst composite glass fiber filtering device is prepared by compounding modified nano titanium dioxide-cobalt oxide sol and a glass fiber material, has high light transmittance, good photocatalytic effect, good dispersibility of nano titanium dioxide and high stability, and can quickly carry out catalytic degradation on harmful pathogens. And the annular UV lamp is adopted for illumination, the light source is uniformly distributed, and the utilization rate of the modified nano titanium dioxide photocatalyst material is greatly improved.
Meanwhile, aiming at the defect that titanium dioxide nano-particles are wrapped by limited adsorbed low-toxicity pollutants to reach a saturated adsorption state, so that high-toxicity pathogenic microorganism pollutants are difficult to effectively contact with the titanium dioxide, the filtering device is designed for graded consideration, and graded filtering is performed from large-particle pollutants to small-particle pollutants, so that the defect of low photocatalyst utilization rate caused by aggregation and wrapping of the low-toxicity large-particle pollutants of the nano-titanium dioxide is overcome, and the purification effect of sucked polluted air is improved.
The following is a preferred embodiment of the above embodiment with respect to a drainage system:
the drainage system comprises a drainage pipeline 90 and a collecting tank 100; the liquid collecting groove 100 is arranged at the bottom surface of the chamber at the lower part of the box body 20, the inlet end of the liquid drainage pipeline 90 is arranged at the opening of the separating mechanism, and the outlet end of the liquid drainage pipeline 90 is connected with the liquid collecting groove 100 and used for collecting liquid pollutants generated in the filtering process.
Further scheme: the sump 100 is embedded in the case 20 by a slide rail, and the waste liquid is removed by drawing the sump.
The above is a detailed description of specific embodiments of the invention, but the invention is not limited to the specific embodiments described above, which are intended as examples only, and any equivalent modifications and alternatives to the drainage system are within the scope of the invention for those skilled in the art.
The following is a preferred embodiment of the above embodiment with respect to a drainage system:
the negative pressure suction system comprises a vacuum pump motor 110, a turbine fan 120 and a silencing system 130; the vacuum pump motor 110 and the turbine fan 120 are installed in the lower chamber of the case 20 and near the exhaust port 170; the noise reduction of the vacuum pump motor 110 is realized through the silencing system 130, so that the noise is reduced, the oral cavity examination room is quieter, and the examination comfort of a patient is improved.
Further scheme: the sound-absorbing system 130 may adopt some sound-absorbing materials, and the sound-absorbing materials absorb the noise generated by the vacuum pump motor; or the silencing system adopts a spring-like damping device which is arranged below the vacuum pump motor, and the vibration of the vacuum pump motor in operation is slowed down through the damping device, so that the noise reduction is realized.
The above is a detailed description of specific implementations of the present invention, but the present invention is not limited to the specific embodiments described above, which are only examples, and any equivalent modifications and substitutions for the muffler system are within the scope of the present invention for those skilled in the art.
A preferred embodiment of the above embodiment is given below with respect to an air suction mask:
the air suction mask 10 adopts a bell mouth-shaped mask, and the connecting pipe 140 is a movable hollow connecting pipe; the movable hollow connecting pipe is composed of a plurality of hollow pipes which are connected with each other, a rotating part is installed at the joint of the two adjacent hollow pipes, and the free rotation of the hollow pipes is realized through the rotating part, so that the positions of the hollow pipes and the horn mouth-shaped mask in a consulting room are adjusted.
Further scheme: the rotating part can adopt a damping rotating part for connecting the fixing of the pipe after rotating for a preset angle.
A preferred embodiment of the above embodiment is given below with respect to the case:
the outer wall of the box body 20 is made of an antibacterial material, the direction of an air inlet of the box body is perpendicular to the droplet and aerosol filtering and pathogen killing device, the bottom of the box body is provided with movable base rollers, and the outer wall of the box body is provided with a UV lamp power supply controller 150.
Based on the above described system architecture, the working mechanism of the present invention is described as follows:
during the clinical diagnosis and treatment of the oral cavity, the oral cavity power apparatus can generate a large amount of spray and aerosol which can carry microorganisms such as bacteria or viruses and the like to be suspended in the air when rotating at a high speed. The modified nano titanium dioxide photocatalyst oral cavity examination room droplet and aerosol suction device provided by the invention has the advantages that the droplets and aerosol are sucked by the horn-shaped air suction mask, enter the droplet, aerosol filtering and pathogen killing device through the movable hollow connecting pipe, and sequentially pass through the activated carbon fiber large particle adsorption filtering device, the preposed modified nano titanium dioxide photocatalyst composite glass fiber filtering device (pathogen filtering device), the polyethylene fiber non-woven fabric filtering device (HEPA filter) and the postposition modified nano titanium dioxide photocatalyst composite glass fiber filtering device (pathogen filtering device), so that the purpose of filtering and sterilizing is achieved.
The filter device is provided with classification consideration, and from large-particle pollutants to small-particle pollutants, the pollutant particles with different particle diameters are classified and filtered, so that the defect that the utilization rate of the photocatalyst is low due to the aggregation and the wrapping of low-toxicity large-particle pollutants of the nano titanium dioxide is reduced, and the purification effect of sucked polluted air is improved. Meanwhile, annular UV lamps are respectively arranged in front of the front pathogen filtering device and the rear pathogen filtering device, under the illumination of the UV lamps, the modified nano titanium dioxide photocatalyst is sufficiently catalyzed, hydroxyl free radicals with extremely strong oxidizing capability can be generated, and organic matters and inorganic matters are strongly catalyzed and degraded, so that the effect of effectively killing pathogenic microorganisms (bacteria or viruses) for a long time is achieved, inhaled spray and aerosol are sufficiently purified, the filtering devices do not need to be frequently replaced, and the cost is reduced. Meanwhile, the liquid discharge pipeline and the liquid collecting tank are additionally arranged, so that liquid pollutants generated by condensation of droplets and aerosol in the filtering process can be conveniently collected, and the liquid collecting tank can be pulled and pulled to conveniently remove the liquid pollutants.
In order to reduce the noise generated by the strong negative pressure suction system, the invention is also provided with a silencing system, so that the medical care personnel and the patient can use the medical care personnel more comfortably.
The invention relates to a powerful suction and filtration device for a large amount of spray and aerosol generated by an oral cavity power apparatus in high-speed rotation, which can efficiently kill microorganisms such as bacteria or viruses contained in the spray and the aerosol and can be used together with the oral cavity power apparatus, thereby preventing infectious diseases from being transmitted in an oral cavity diagnosis room through the spray and the aerosol.
The invention can also be used for sucking the aerosol generated when tracheal intubation and tracheotomy are carried out on patients with respiratory infectious diseases, and the nosocomial spread of the respiratory infectious diseases is avoided by strongly sucking the aerosol and effectively killing pathogenic bacteria carried by the aerosol, thereby providing powerful protection for medical care personnel carrying out operation and greatly protecting the life health of medical workers. The above description of the present invention is only a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above-described examples.
The experimental results of the modified nano titanium dioxide photocatalyst oral cavity examination room droplet and aerosol suction device are given as follows:
1. bacterial culture
Three oral common bacteria including Streptococcus sanguis, Streptococcus mutans and Actinomyces viscosus are inoculated into BHI liquid culture medium after being recovered for 48h at 37 ℃ and 80% N2，10％CO2And 10% of H2Culturing and subculturing under anaerobic environment, and culturing with bacteria turbidimeterThe bacterial liquid is adjusted to 0.5MCF concentration (bacterial count about 1 × 10)8CFU/ml), medium was diluted to about 105CFU/ml for use.
2. Preparation of photocatalyst granular culture medium containing modified titanium dioxide
Preparing the modified nano titanium dioxide photocatalyst particles into stock solution with the concentration of 10mg/ml by using distilled water, and preparing the stock solution into culture media with the concentrations of 10, 5, 2.5, 1.25, 0.625 and 0.313mg/ml by using a sterilized TSB solution according to a double dilution method.
3. Determining MIC and MBC of the modified nano titanium dioxide photocatalyst particles to three common oral bacteria
In the experiment, a constant broth dilution method is adopted, sterile culture solution is used as a control, and 1ml of culture solution and 0.1ml of bacterial solution are added into a test tube containing 40, 20, 10, 5, 2.5, 1.25, 0.625 and 0.313mg/ml modified nano titanium dioxide photocatalyst particles in sequence. And (3) after 24 hours of incubation, visually observing turbidity to obtain the minimum modified nano titanium dioxide photocatalyst concentration for inhibiting the growth of bacteria as MIC, numbering the clarification test tubes in the MIC experiment, respectively taking 10 mu l of planking, and observing the number of colonies on the plates after 48 hours. The minimum modified nano titanium dioxide photocatalyst concentration without colony growth is MBC, the repetition is carried out for 3 times, and the result is taken as an average value.
The result shows that under the indoor illumination condition, the minimum inhibitory concentration of the modified nano titanium dioxide photocatalyst on streptococcus sanguis is 2.5mg/ml, the minimum inhibitory concentration on streptococcus mutans is 1.25mg/ml, and the minimum inhibitory concentration on viscous actinomycetes is 2.5mg/ml (Table 1).
TABLE 1 MIC, MBC of modified nano titanium dioxide photocatalyst particles to three common oral bacteria
4. Grouping of antimicrobial samples
Grouping according to MIC measurement results to prepare modified nano titanium dioxide photocatalyst composite glass fiber samples with different contents.
Control group a, bacteria;
b low dose group: bacteria, containing 2.5mg/ml modified nano titanium dioxide photocatalyst composite glass fiber sample, without illumination;
c, high-dose group, bacteria, and a composite glass fiber sample containing 5mg/ml modified nano titanium dioxide photocatalyst, and no illumination;
d low dose light group: bacteria, containing 2.5mg/ml modified nano titanium dioxide photocatalyst composite glass fiber sample, and illuminating;
e, a high-dose illumination group, bacteria and a photocatalyst composite glass fiber sample containing 5mg/ml modified nano titanium dioxide, wherein the sample is illuminated.
5. Antimicrobial Rate detection
Randomly drawing 3 samples from 5 groups of samples, after conventional disinfection, respectively dripping 0.2ml of deformed streptococcus bacterial suspension (1 × 105CFU/ml) on B, C groups of samples under the condition of shading, respectively dripping 0.2ml of deformed streptococcus bacterial suspension (1 × 105CFU/ml) on A, D, E groups of samples under the condition of illumination at room temperature of 30 ℃, covering a polypropylene film to enable the bacterial suspension to uniformly contact the samples, culturing under the anaerobic condition of (37 +/-1) DEG C and relative humidity of 95%, taking out all the samples after culturing for 24h, respectively shaking and cleaning the samples and a covering film by 20ml of physiological saline, after fully shaking up the eluent uniformly, diluting in a multiple ratio, taking 0.2ml of the samples to inoculate a plate culture medium (TSA), culturing for 24h under the anaerobic condition of 37 ℃, taking plates with the colony number of 0-600 on the plates as the standard for viable count, and calculating the recovery number of each test according to dilution times, taking an average value, and calculating the antibacterial rate, wherein the antibacterial rate of the group D under the condition is 86%, and the antibacterial rate of the modified glass fiber under the condition of the modified group can obviously produce antibacterial effect under the condition of 2.8% of titanium under the modified glass fiber under the condition of light, and the light, the antibacterial rate of the glass fiber under the condition of 2.8.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. Modified nanometer titanium dioxide photocatalyst oral cavity consulting room droplet and aerosol suction device, its characterized in that: comprises an air suction mask, a box body, a droplet, aerosol filtering and pathogen killing device, a negative pressure suction system and a liquid discharge system;
the interior of the box body is provided with a separation mechanism, the upper cavity is internally provided with the droplet, aerosol filtering and pathogen killing device, and the lower cavity is internally provided with a negative pressure suction system and a liquid discharge system;
the air suction mask is connected with an air inlet positioned in the upper cavity of the box body through a connecting pipe;
the air suction mask is used for sucking the droplets and the aerosol into a cavity at the upper part of the box body, and the droplets and the aerosol enter a droplet, aerosol filtering and pathogen killing device through a negative pressure suction system so as to kill bacteria or virus microorganisms contained in the droplets and the aerosol;
liquid pollutants generated by condensation of the spray and the aerosol in the filtering process are collected through a drainage system.
2. The modified nano titanium dioxide photocatalyst oral office droplet and aerosol suction device according to claim 1, wherein:
the device for filtering the spray and the aerosol and killing the pathogen is sequentially arranged from the air inlet at intervals into an activated carbon fiber large particle adsorption and filtration device, a preposed UV lamp, a preposed modified nano titanium dioxide photocatalyst composite glass fiber filtration device, a polyethylene fiber non-woven fabric filtration device, a postposition UV lamp and a postposition modified nano titanium dioxide photocatalyst composite glass fiber filtration device.
3. The modified nano titanium dioxide photocatalyst oral office droplet and aerosol suction device according to claim 2, wherein:
the titanium dioxide contained in the modified nano titanium dioxide photocatalyst composite glass fiber filtering device is modified nano titanium dioxide, and oxygen vacancies are introduced into the crystal lattices of the nano titanium dioxide, so that the forbidden bandwidth of the nano titanium dioxide is narrowed, and the photocatalytic rate and the light utilization rate are improved; the modified nano titanium dioxide photocatalyst composite glass fiber filtering device is prepared by compounding modified nano titanium dioxide-cobalt oxide sol and a glass fiber material, and can be used for quickly and fully catalyzing and degrading harmful pathogens.
4. The modified nano titanium dioxide photocatalyst oral office droplet and aerosol suction device according to claim 2, wherein:
the UV lamp is an annular lamp source, so that the irradiation area of UV is increased, and the response of the nano titanium dioxide photocatalyst to light is increased.
5. The modified nano titanium dioxide photocatalyst oral office droplet and aerosol suction device according to claim 2, wherein:
activated carbon fiber large particle adsorbs filter equipment, leading UV lamp, leading modified nanometer titanium dioxide photocatalyst composite glass fiber filter equipment, polyethylene fiber non-woven fabrics filter equipment, rearmounted UV lamp, the interval between the compound glass fiber filter equipment of rearmounted modified nanometer titanium dioxide photocatalyst is about 4cm ~6 cm.
6. The modified nano titanium dioxide photocatalyst oral office droplet and aerosol suction device according to claim 1, wherein:
the liquid drainage system comprises a liquid drainage pipeline and a liquid collection tank;
the collecting tank is arranged on the bottom surface of the chamber at the lower part of the box body, the inlet end of the liquid discharge pipeline is arranged at the opening of the separating mechanism, and the outlet end of the liquid discharge pipeline is connected with the collecting tank.
7. The modified nano titanium dioxide photocatalyst oral office droplet and aerosol suction device according to claim 1, wherein:
the negative pressure suction system comprises a vacuum pump motor, a turbine fan and a silencing system;
the vacuum pump motor and the turbine fan are arranged in a cavity at the lower part of the box body and are close to the exhaust port;
the noise reduction of the vacuum pump motor is realized through a silencing system.
8. The modified nano titanium dioxide photocatalyst oral office droplet and aerosol suction device according to claim 1, wherein:
the air suction mask adopts a bell mouth-shaped mask, and the connecting pipe is a movable hollow connecting pipe;
the movable hollow connecting pipe is composed of a plurality of hollow pipes which are connected with each other, a rotating part is installed at the joint of the two adjacent hollow pipes, and the free rotation of the hollow pipes is realized through the rotating part, so that the positions of the hollow pipes and the horn mouth-shaped mask in a consulting room are adjusted.
9. The modified nano titanium dioxide photocatalyst oral office droplet and aerosol suction device according to claim 1, wherein:
the outer wall of the box body is made of an antibacterial material, the direction of an air inlet of the box body is perpendicular to the droplet and aerosol filtering and pathogen killing device, the bottom of the box body is provided with a movable base roller, and the outer wall of the box body is provided with a UV lamp power supply controller.
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| CN112717605A (en) * | 2020-12-05 | 2021-04-30 | 上海硅莱医疗器械有限公司 | Droplet suction filtration equipment |
| CN112603572A (en) * | 2020-12-28 | 2021-04-06 | 江苏巨光光电科技有限公司 | Aerial fog collecting cover |
| CN112603572B (en) * | 2020-12-28 | 2022-05-06 | 江苏巨光光电科技有限公司 | Aerial fog collecting cover |
| IT202100005459A1 (en) * | 2021-03-09 | 2022-09-09 | Claudio Agostinelli | SYSTEM FOR SUCTION AND TREATMENT OF AEROSOL OR AIR AND NEUTRALIZATION OF PATHOGENIC MICRO-ORGANISMS PRESENT IN AEROSOL OR AIR, METHOD FOR TREATMENT OF AEROSOL OR AIR AND DEVICE FOR COLLECTION OF AEROSOL OR AIR, PARTICULARLY IN MEDICAL APPLICATIONS AND EVEN MORE ' PARTICULARLY IN THE DENTAL FIELD. |
| CN113476620A (en) * | 2021-06-11 | 2021-10-08 | 中国人民解放军军事科学院军事医学研究院 | Novel biological aerosol inactivation device |
| CN113967098A (en) * | 2021-10-29 | 2022-01-25 | 广东福肯科技工业有限公司 | Aerosol suction machine |
| CN113967098B (en) * | 2021-10-29 | 2023-12-08 | 广东福肯科技工业有限公司 | Aerosol suction machine |
| CN115213185A (en) * | 2022-08-03 | 2022-10-21 | 广东瀚森智慧医疗电子科技有限公司 | Negative pressure suction system |
| CN115213185B (en) * | 2022-08-03 | 2023-07-25 | 广东瀚森智慧医疗电子科技有限公司 | Negative pressure suction system |
| CN115645590A (en) * | 2022-10-09 | 2023-01-31 | 大连赛纳科技有限公司 | Device for rapidly killing viruses in aerosol during nucleic acid sampling |
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Application publication date: 20200731 |