Target:
Conditions: quartzing during current cleaning is carried out for 30 minutes, with spring cleaning-2 hours.
Indications:
Equipment:
bactericidal lamp OBN;
workwear;
gloves;
disinfectant solution;
alcohol 70%;
cotton swab, rags.
Execution order:
The device is designed for disinfecting indoor air.
Before connecting the device to the network, make sure that the power cord is not damaged.
Plug in the power cord for a certain period of time (for current cleaning for 30 minutes, for general cleaning for 2 hours).
It is forbidden to enter the room when the bactericidal lamp is turned on; entry is allowed 30 minutes after the lamp is turned off and aired.
The bactericidal lamp is replaced after 8000 hours of operation.
The operation of the bactericidal lamp is recorded in the Quartz Treatment Logbook.
The external finishing of the device allows for wet sanitization with a 0.1% Javel-Solid solution (solichlor, deochlor), twice with an interval of 15 minutes. Wipe the bactericidal lamp with a moistened gauze swab ethyl alcohol, once a week.
Sanitation and cleaning of the device is carried out after disconnecting from the network.
Do not allow liquid to get inside the bactericidal lamp!
Unshielded mobile bactericidal irradiators are installed at a power rate of 2.0 - 2.5 watts (hereinafter referred to as W) per cubic meter (hereinafter referred to as m3) of room.
Shielded bactericidal irradiators with a power of 1.0 W per 1 m3 of room are installed at a height of 1.8 - 2.0 m from the floor, provided that the radiation is not directed towards people in the room.
In rooms with intense continuous load, ultraviolet recirculators are installed.
Troubleshooting the germicidal lamp is carried out by a medical equipment maintenance engineer.
Germicidal lamps belong to class “G” according to the unified classification of medical waste. Collection and temporary storage of used lamps is carried out in a separate room.
Target: prevention of nosocomial infection.
Conditions: carrying out routine cleaning.
Indications: control of nosocomial infections.
Equipment:
cleaning equipment, rags;
measuring containers;
workwear;
safety shoes;
gloves;
disinfectants and detergents;
bactericidal lamp or recirculator.
Execution order:
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Event. |
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In the operating unit, in the department of anesthesiology, resuscitation, intensive care, in the sterile blocks of the central sterilization department and bacteriological laboratory, in the section room and in the laboratory of the pathology department current wet cleaning carried out 2 times a day using disinfectants (solution concentration as during general cleaning): 0.1% Javel-Solid = 7 tablets per 10 liters of water or 0.1% deochlor = 7 tablets, 0.1% Soliclor=7 tablets, 1.0% aldazan=80 ml to 8 liters of water, 2.5% defect = 250 ml to 10 liters of water, 2.0% dolbak = 200 ml to 10 l of water, 0.2% lysorine = 20 ml to 10 liters of water, 0.2% dezosept = 20 ml to 10 liters of water, 0.1% septalite=10 ml to 10 liters of water, 0.032% septalite DCC = 2 tablets per 10 liters of water. |
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Routine wet cleaning is carried out in other rooms, wards, offices, laundry and in the catering department of the branch carried out 2 times a day using disinfectants in a concentration of 1 tablet per 10 liters of water. |
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Wet cleaning of all surfaces is carried out: window sill, bed, bedside table, cabinets, tables, floor, doors, door handles, sinks and taps, water and sewer pipes. |
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Quartzization of a room or office with a bactericidal lamp or recirculator for 30 minutes. Hang a sign on the door “Attention, the bactericidal irradiator is on!”; Record the time in the quartzing log and in the general cleaning log. |
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Ventilate the room for 15-30 minutes depending on the season. |
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IN summer period, from June 1 to September 1 annually, the concentration of the working solution of the disinfectant is increased (for example: 2 Soliclor tablets per 10 liters of water) in order to prevent intestinal infections. |
Various microorganisms that are carriers of infections and viruses constantly live in the air. It is unrealistic to fight germs and bacteria outdoors in an open space. But it is possible to purify indoor air using special devices, .
If a person has high immune defense, his body independently fights pathogenic microorganisms. However, people with weak immune systems are much more likely to catch diseases carried by bacteria and viruses. For this reason, bactericidal lamps have become widespread in medical institutions, schools, kindergartens, and enterprises. Catering.
The bactericidal irradiator became effective means in the fight against infectious diseases, viruses and many other pathogenic agents, especially in the cold season.
The lamps do an excellent job of disinfecting air, surfaces and water. Open bactericidal irradiators are used only where people and other living beings are not present. And closed lamps are successfully used in rooms where people and other living beings are located. The maximum effect in air purification and disinfection is demonstrated by the use of two types of mercury-quartz devices.
UV disinfection lamps are suitable for:
Depending on the nature of the actions performed and the purpose of the premises, they are classified into three categories:
To disinfect rooms with the constant presence of living beings, it is necessary to use closed-type devices that do not allow direct radiation to escape into the room. Recirculators are used for this. With their help, continuous operation of the lamp is ensured.
If it is possible to temporarily vacate a room from people, then bactericidal irradiators are used that carry out disinfection with a directed ultraviolet stream. Such devices do not work for long.
Short-term exposure to ultraviolet light provides children with vitamin D, usually supplied sunlight. "Sunshine Vitamin" strengthens young bones. Recirculators are installed in rooms on the walls, taking into account the main air flows, namely next to heating devices at a height of 2 meters from the floor.
If the room is cleared of people for a short time, then mixed-type irradiators become appropriate. While there are people in the room, they work, and when the room remains empty, the irradiators are turned on a short time. In this case, the operating time of the device is reduced to 5 minutes. The intervals between disinfections are 3 hours. Thanks to mixed disinfection devices, the degree of disinfection of rooms during preparation for operations increases.
In the absence of a person, disinfection is carried out with open instruments or devices combined type. The maximum duration of irradiation is 25 minutes. During this time, the required level of bactericidal effect is achieved. The intervals between services should be at least 2 hours.
Power supply for ultraviolet installations open view supplied using special switches located outside the room, next to the entrance. These switches are accompanied by the use of an illuminated sign indicating “Danger” or “Do not enter, disinfection in progress.”
Expert opinion
Alexey Bartosh
Ask a question to an expertAttention! To prevent unexpected exposure of people to ultraviolet radiation, devices are recommended that block the power supply to the device if the doors are opened.
Switches for “ozone-free” devices are mounted in any accessible place. Above them you need to hang a sign “Bactericidal irradiation”.
It is imperative to provide personal protective equipment for employees from ultraviolet radiation: face masks, glasses, gloves. These things are used when there is an urgent need for a person to be in the room when the irradiator is operating.
Glasses - means of protection against negative impact bactericidal and quartz lamps Operation of open ultraviolet lamps in a room where there are people is strictly prohibited, according to sanitary rules.
When using mixed-type irradiation devices, the bactericidal flow from the shielded lamp is directed to the ceiling in such a way as to prevent the rays from reaching living objects.
Combination devices are equipped with separate switches, which provide separate control of the unprotected and shielded bulbs. In this case, the action of open lamps is permissible only in the absence of living beings in the room.
Using mobile types of irradiators for effective disinfection, service personnel wear face masks, protective gloves and goggles. These products prevent ultraviolet rays from reaching the skin and mucous membranes of the eyes. Disinfection is carried out without the presence of strangers.
Installations that use reflected flow in their operation are used exclusively in places where people are present for a short time, for example, in warehouses, toilets, corridors. It is important to comply with hygienic requirements regarding the degree of exposure, the duration of one-time exposure and the time interval between procedures and total time action of the irradiator.
Regardless of the purpose of the room and under any conditions, bactericidal devices are placed in such a way as to prevent human exposure to direct directed ultraviolet radiation.
To increase the operating efficiency of bactericidal devices, following rules. Closed irradiators or recirculators are installed in rooms on the walls in the same direction as the main air flows, at a height of 2 meters from the floor surface. If several lamps are used, they are placed around the perimeter at the same distance from each other.
Germicidal lamps are placed in places where people frequent The effectiveness of ultraviolet treatment of a room is assessed by the reduction in the concentration of bacteria in the air, on the surfaces of furniture, walls and equipment under the influence of ultraviolet radiation. The basis is an assessment of the degree of microbial contamination before irradiation and after the procedure. Both values are compared with standards.
One of the distinctive qualities of bactericidal devices is the high dependence of their emitting and electrical characteristics from hesitation electrical voltage. When the mains voltage increases, the life of the lamps decreases. When the tension increases by 20 percent, the operating time drops to 50 percent. If the voltage drops by more than 20 percent, the germicidal lamps burn unsteadily or go out completely.
During lamp operation, the emitted ultraviolet flux gradually decreases. A too rapid reduction in flux is observed during the first tens of hours of using the lamp - up to 10 percent. With further use, the rate of reduction decreases. The duration of lamp operation is affected by the number of switches.
The temperature indicators of the air in the room and the movement of air masses are reflected in the fluxes of lamp radiation. Closed devices practically do not change their power when external temperatures change, unlike open lamps. The lower the room temperature, the more difficult it is to ignite devices, the sputtering of electrodes increases, which reduces the service life of the product. If the air in the room is colder than 10 degrees Celsius, some lamps may not turn on.
The electrical characteristics of bactericidal devices practically do not differ from the parameters of standard fluorescent lamps. They can be connected to the network alternating current.
The bactericidal lamp instructions for use describe all the requirements regarding safety and rules of interaction with the device. Before turning on the device, you need to carefully set the correct direction of the radiation flow. It is also necessary to strictly follow safety instructions when using stabilizers.
Cleaning and processing of the device is carried out only after it is disconnected from the power supply. These procedures are performed with soft sponges without water. In treatment rooms, kindergartens, and clinics, there is always a logbook where the operation of these devices is recorded.
When ultraviolet waves up to 320 nm hit exposed skin or eyes, dangerous burns and a serious risk of developing melanoma, a skin cancer, occur. Therefore, disinfection lamps are used at a time when there is no one in the room. In some cases, it is acceptable for an adult to be in the room, but the lamps must be protected by an opaque reflective screen that directs the emitted flux towards the ceiling. Remember that no rays from the lamp should reach the area in which living beings, including people, are located.
It is prohibited to use lamps that are not equipped with screens if they are in a person’s field of vision.
Each irradiator has accompanying documents that describe technical properties, types of lamps, magnitude and intensity of flux, expiration dates and production date.
In any disinfection devices, disinfectant lamps and irradiator elements must be kept in perfect cleanliness, since even a slight layer of dust becomes an obstacle to the radiation flow.
Thanks to the study of methodological recommendations, the user high level will comply with the requirements of current regulations describing sanitary standards maintenance of various children's, medical, home premises or production workshops, equipped with irradiators with bactericidal lamps.
When using the described disinfection devices, it is taken into account that ultraviolet irradiation is not a replacement for standard sanitary and epidemiological measures, but only a supplement to them in the form of the final stage of space treatment.
In case of contact with skin or mucous membranes, bactericidal streams from lamps lead to burns. Therefore, it is possible to use bactericidal lamps only in an empty room where there is nothing living. In some situations, a person may be in the room during disinfection. But at the same time, the lamp is equipped with a reflector that directs the flow of ultraviolet radiation upward. The use of unshielded devices near people is prohibited. After performing the procedure, the room needs to be ventilated, especially if a person hears the sour aroma of ozone.
Mobile type irradiators after use are sent to special room for storage and covered with covers.
Lamps that have burned out the allotted number of hours are subject to mandatory replacement. The reason for replacement is also a reduction in the llama flow if its indicator is below the limit. This value is determined by metrological control.
If the lamp is broken or damaged, do not allow mercury vapor or mercury itself to enter the room.
It is prohibited to throw away both whole used lamps and broken devices into general waste containers. These products are sent to the appropriate regional centers involved in the processing of mercury-containing devices. If mercury does get into the room, demercurization is mandatory.
Expert opinion
Alexey Bartosh
Specialist in repair and maintenance of electrical equipment and industrial electronics.
Ask a question to an expertAttention! During operation of the irradiator, ozone may form inside the room. This substance is dangerous to human health. Children and people with chronic respiratory diseases are especially sensitive to the negative effects of ozone. Therefore, regular monitoring of the ozone content in the air of the treated room is required. Concentrations exceeding the norm are unacceptable.
To reduce the risk of ozone formation, preference is now given to ozone-free lamps - closed devices covered with uviol glass rather than quartz. And quartz lamps can only be used in a room free of living creatures.
Organizations in the catering sector, such as cafes, canteens, kitchens and restaurants, are considered to be at high risk for the occurrence of outbreaks and the rapid spread of infectious diseases. Consequently, these establishments are closely monitored by the relevant authorities.
As a rule, disinfection in canteens and restaurants is carried out for prevention. This procedure includes not only mechanical cleaning, but also disinfection using bactericidal lamps.
Disinfection of kitchens in catering establishments is also important. They are carried out to prevent food spoilage and contamination by pathogenic microorganisms. Therefore, bactericidal lamps are now widely used in hot and cold cooking shops. Such lamps study ultraviolet radiation, which destroys bacteria in the air and on indoor surfaces. Ultraviolet irradiators can be used not only to disinfect space, but also to disinfect equipment, kitchen equipment, containers and appliances.
Calculation of time for room disinfection.
Buyers often ask the question, how often and how much time should be spent on disinfecting the premises? Here is a table that will help you navigate this issue for the first time. And then you yourself will choose a convenient operating mode for the devices.This table is compiled based on the recommendations of product manufacturers, as well as the experience of our customers.
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Device type |
Device name |
Area with ceiling heights up to 3 meters |
Device operating time in minutes |
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Open |
Crystal irradiator |
Up to 20 sq.m. |
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Open |
Generis 2x15 W |
Up to 20 sq.m. |
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Open |
Generis 4x15 W |
Up to 20 sq.m. |
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With screen |
OBN 1-15 or OBN-35 Azov |
Up to 20 sq.m |
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Combined |
OBN 2-15 |
Up to 20 sq.m |
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Combined |
OBN-150 |
Up to 20 sq.m |
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With screen |
OBN-75 Azov |
Up to 20 sq.m |
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Recirculator |
Crystal-2, Crystal-3 |
Up to 20 sq.m |
40, 30 |
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Recirculator |
OBR-15, OBR-30 |
Up to 20 sq.m |
40,30 |
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Recirculator |
RB-07, RB-06 |
Up to 20 sq.m |
60,40 |
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Recirculator |
Dezar 2, Dezar-3, Dezar-4 |
Up to 20 sq.m |
80,60,60 |
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With screen |
UFO-LUCH lamp |
Up to 20 sq.m |
In the autumn or spring, the most dangerous period, when epidemics of colds and other diseases most often spread in our climate zone, premises should be disinfected at least twice, and preferably three times a day. At other times of the year, if you are healthy and for preventive purposes, you can reduce the number of disinfections to two or even once a day. Some time after you start using the device, you will develop your own mode of room disinfection that is convenient for you. Our regular customers themselves tell us how to most effectively disinfect an apartment or house.
After disinfection, ventilate the room. When recirculating lamps are operating, it is enough to open the window slightly. If you have purchased a powerful quartz lamp and you have a small apartment with a large hall, then to speed up disinfection you can install an irradiator in this hall and the lamp will illuminate all your rooms. And due to natural circulation air in an apartment (office), disinfection will cover even those corners of the room into which direct ultraviolet rays do not penetrate.
In special difficult cases You can consult our managers on how best to start using the devices. And which mode to use in your specific case. You can order a quartz lamp around the clock through the shopping cart on the website, and buy a bactericidal irradiator You can from 10-00 to 20-00 in our store.
If you disinfect premises with lamps high pressure(such as the Sun), then you should turn off the device for 20 minutes every 15 minutes in order to then continue disinfection again. If you follow this recommendation, the devices will last you a long time and you will not need to change the work lamp often.
Recirculators such as OBR-15, Kristall-2 or Kristall-3 should be turned on 3 times a day for no more than an hour. However, you can stay indoors. When these devices operate, practically no ozone is released, so the window in the room can only be opened slightly.
The duration of operation of the irradiator T min is determined from a simple formula:
T min = V pom (m³)/Q region (m³/hour)*60 (minutes) + 2 minutes,
where V room is the volume of the room, and Q region. - irradiator performance. 2 minutes is the time the UV lamp reaches operating mode.
Initial data:
1. Type of premises - operating room;
2. Room volume - V = 150m 3 ;
3. Terms of service:
- disinfection of the entire room for 15 minutes (0.25 hours), i.e. 900s, at
absence of people in the room;
- disinfection of indoor air during surgery
(for 60 minutes, i.e. 3600s).
It is necessary to determine: the type and quantity of bactericidal irradiators.
CALCULATION:
1. Disinfection of the premises.
To disinfect the premises, we choose bactericidal irradiators open type OBNP 01-2x30. From Table 2, we determine the volumetric dose (exposure) value Hv for Staphylococcus aureus (nm) at the level of bactericidal efficiency Jbq = 99.9%, Hv = 385 J/m3.
From the tables we determine the total bactericidal flow:
Fbq l = 1 10.8 W = 10.8 W;
bactericidal flow utilization factor kf = 0.8;
safety factor kз = 0.65.
The required number of bactericidal irradiators is calculated using the formula:
no = Hv · V/ kz · kf · nl · Fbk · l · ? t= 385 · 150/0.65 · 0.8 · 2 · 11.2 · 1 · 900=5.5 = 6 pcs.
2. Air disinfection.
To disinfect the air while people are indoors, it is advisable to use closed-type bactericidal irradiators - so-called recirculators, for example, using a UV recirculator
RBB 02-4x15. The number of UV recirculators required to disinfect air from Staphylococcus aureus with a bactericidal efficiency of 99.9% can be easily determined from the formula:
no = Hv·V/ kz·kf·nl Fbk·l · ?·t= 385·150 / 0.65 0.4 4 4.7 1 3600= 4 pcs.
Table 1
Premises of healthcare facilities to be equipped with a control unit for air disinfection, depending on the category, the required level of bactericidal efficiency Jbk and volumetric dose
| Category | Types of premises | Norms of microbial contamination, CFU per 1 m3 | Staphylococcus aureus | Jbq, %, | Hv, J/m 3 (reference values) |
| General microflora | no less | ||||
| I | Operating rooms, preoperative rooms, maternity rooms, sterile areas of the central medical care center, children's wards of maternity hospitals, wards for premature and injured children | no higher than 500 | must not be | 99,9 | 385 |
| II | Dressing rooms, sterilization and pasteurization rooms breast milk, wards and departments of immunocompromised patients, wards of intensive care units, premises of non-sterile areas of the central care center, bacteriological and virological laboratories, blood transfusion stations, pharmaceutical workshops for the production of sterile dosage forms | no higher than 1000 | no more than 4 | 99 | 256 |
| III | Wards, offices and other premises of health care facilities (not included in categories I and II) | not standardized | not standardized | 95 | 167 |
| IV | Children's playrooms, school classrooms, domestic premises of industrial and public buildings with large crowds of people for a long stay | not standardized | not standardized | 90 | 130 |
| V | Smoking rooms, public toilets And landings premises of health care facilities | not standardized | not standardized | 85 | 105 |
CFU - colony forming units
CSO - centralized sterilization departments
table 2
Premises of food trade and food production enterprises to be equipped with a control unit for air disinfection, depending on the category, the required level of bactericidal efficiency Jbk and the volumetric dose Hv
| Category | Types of premises | Jbq, %, | Hv, J/m 3 |
| no less | (values for reference) | ||
| I |
Preparation of gastronomic, milk-fat, meat, fish and vegetable products. Cutting meat. Cheese factories. Breweries. Juice factories. Food production workshops: Sausages and sausages; Meat and fish products; Canning fish, meat, vegetable and fruit products; Dairy products; Confectionery products. | 99 | 256 |
| II | Containers and packaging. Preparation food products for sale. Preparing the dough. Smoking chambers for meat products, sausages and fish. Production of food concentrates and pasta. | 95 | 167 |
| III | Slaughterhouses. Areas for cooking, kitchens. Meal halls of canteens, cafes, bars, restaurants, buffets. | 90 | 130 |
| IV |
Household premises: Dressing rooms; Linen for clean and dirty linen; Shower changing rooms; Women's personal hygiene rooms; Washbasins and toilets; Smoking rooms. | 85 | 106 |
| V | Chambers, bases, warehouses for storing meat products, sausages, fish and other products at an ambient temperature of not lower than 10? C | 80 | 90 |
Educational organizations often become hotbeds of viral diseases, and the peculiarities of their functioning contribute to the spread of infections. Among the factors that determine the high risk of the spread of airborne diseases in educational organizations are overcrowding of groups and classes, crowding in recreation areas, locker rooms, and insufficient knowledge of personal hygiene rules, which especially concerns primary school students and preschoolers.
There are often situations when one or two children with signs of the disease are enough for the infection to be transmitted by airborne droplets to other students in the class (group). That is why during periods of epidemic growth Special attention need to pay attention to organizing the morning filter when receiving children in kindergarten(school) in order to prevent a student with signs of illness from being in the group. When a sick person is identified, it is important to isolate him in time.
No less important for preventing the occurrence and spread of infections during the period of epidemic growth is the implementation of disinfection measures in educational and group rooms. In addition to the widely used chemical methods disinfection; currently, educational organizations also use the method of ultraviolet disinfection of premises. The article will discuss specifically the physical method of disinfection.
At ultravioletdisinfection premises the impact of irradiation on the structure of microorganisms in the air and on various surfaces, leads to a slowdown in their reproduction rates and extinction. Ultraviolet bactericidal irradiation of indoor air is carried out using ultraviolet bactericidal irradiators and installations, which are used to reduce the level of bacterial contamination and create conditions to prevent the spread of pathogens of infectious diseases.
Our information.According to clause 2.3 R 3.5.1904-04 “Use of ultraviolet bactericidal radiation for disinfection of indoor air,” ultraviolet bactericidal installations should be used in rooms with increased risk spread of infectious agents: in treatment and prophylactic, preschool, school, industrial and public organizations and other rooms with large crowds of people.
The use of ultraviolet equipment, according to the Moscow Department of Education, can significantly reduce the level of microbial contamination of the air in rooms with an increased risk of the spread of infectious agents in group, educational and other premises with large concentrations of children - canteens, assembly halls and gyms. Practice of using ultraviolet equipment in educational organizations in 2005-2010. showed a reduction in the incidence of acute respiratory viral infections (ARVI) among children by more than 30%.
Ultraviolet bactericidal irradiators
An ultraviolet bactericidal irradiator (hereinafter referred to as a bactericidal irradiator) is an electrical device consisting of an ultraviolet bactericidal lamp or lamps, a ballast, reflective fittings, parts for attaching lamps and connecting to the power supply network, as well as elements for suppressing electromagnetic interference in the radio frequency range. Bactericidal irradiators are divided into three groups: open, closed and combined.
U closed irradiators (recirculators), the bactericidal flow from the lamps located in a small closed space of the irradiator housing has no outlet to the outside. In this case, air disinfection is carried out in the process of pumping it through ventilation holes, available on the case, using a fan. Such irradiators used to disinfect air in the presence of people .
U open irradiators, the direct bactericidal flow from lamps and reflector (or without it) covers a wide area in space. Combined The irradiators are equipped with two bactericidal lamps, separated by a screen in such a way that the flow from one lamp is directed outward to the lower zone of the room, and from the other to the upper zone. The lamps can be turned on together or separately. Open and combined irradiators can be used to disinfect a room only in the absence of people or during their short stay in the room .
In the presence of people with time restrictions, use method of indirect irradiation of premises. It is carried out using lamps suspended at a height of 1.8-2.0 m from the floor with a reflector facing upward so that the direct radiation flow falls into the upper zone of the room. The lower area of the room is protected from direct rays by a lamp reflector. The air passing through the upper zone of the room is actually exposed to direct irradiation. Ultraviolet rays reflected from the ceiling and upper part of the walls affect the lower zone of the room where people may be. The best degree of reflection is achieved if the walls are painted in White color. And yet, the efficiency of air disinfection in the lower zone is practically zero, since the intensity of reflected radiation is 20-30 times less than direct radiation.
Germicidal irradiators can be mobile and stationary. The latter are usually mounted on the wall. Mobile irradiators are the optimal solution for institutions where disinfection is not carried out simultaneously in all rooms. In preschool educational organizations, a mobile irradiator can be located, for example, in a place where toys are stored. In schools it is more convenient to use stationary recirculators.
The main disadvantage of ultraviolet disinfection of air and surfaces is the lack of a prolonged effect. The advantage is that when using this method, it is eliminated harmful effects on humans and animals, which cannot be said about disinfection with chlorine-containing substances. In addition, bactericidal lamps, unlike quartz lamps, do not produce ozone during operation: the glass of the lamp filters out the ozone-forming spectral line. Their use is safe for the respiratory system, and rooms with continuously operating bactericidal lamps do not require mandatory ventilation.
For your information
In the most common lamps low pressure 86% of the radiation occurs at a wavelength of 254 nm, which is in good agreement with the peak of the bactericidal efficiency curve, i.e., the efficiency of ultraviolet absorption by DNA molecules.
Some features of the use of bactericidal irradiators in educational organizations
First of all, ultraviolet irradiation in educational organizations should be used to disinfect the air. Surfaces in kindergartens and schools are disinfected using disinfectants, but a bactericidal irradiator allows for additional treatment. It is important that the surfaces to be disinfected are clean and free of clutter. foreign objects. A special area of application of bactericidal irradiators in kindergartens is the disinfection of toys. The fact is that some types of toys ( Stuffed Toys big size, play structures from different types materials, etc.) cannot be processed chemicals, wash or disassemble into parts for disinfection individual elements. In this case, when carrying out ultraviolet disinfection of a room, large toys are placed in an open space, composite toys are disassembled as much as possible and the parts are laid out.
Rules for working withbactericidalirradiator
1. The operation of bactericidal irradiators must be carried out in strict accordance with the requirements specified in the passport and operating instructions.
2. Personnel who have not undergone the necessary training are not allowed to operate bactericidal installations. in the prescribed manner, the implementation of which should be documented.
3. Closed-type irradiators (recirculators) should be placed indoors on the walls along the main air flows, in particular near heating devices, at a height of at least 1.5-2.0 m from the floor. The location of the recirculator must be accessible for processing.
4. Every week, the bactericidal irradiator lamp is wiped from all sides from dust and fatty deposits with a sterile gauze cloth. The presence of dust on the lamp reduces the effectiveness of air and surface disinfection by up to 50%. Wiping off dust should only be carried out when the bactericidal installation is disconnected from the network.
5. Normally, closed-type bactericidal irradiators do not emit ozone. But if the lamps malfunction or reach the end of their service life, the smell of ozone may occur in the room. In this case, you must immediately remove people from the room and thoroughly ventilate it until the ozone smell disappears.
6. All premises with bactericidal installations, operating or just being introduced, must have an act of their commissioning and a log of their registration and control.
Logbook for registration and control of ultraviolet bactericidal installation
According to Appendix 3 to R 3.5.1904-04, the registration and control log of an ultraviolet bactericidal installation is a document confirming its performance and operational safety. It must register all bactericidal installations in operation on the premises of the institution, as well as the results of control checks of the condition of the bactericidal irradiator. The magazine consists of two parts. Examples of the design of each of them in accordance with Appendix 3 to R 3.5.1904-04 are presented below.
Exposition
Unlike quartz lamps or open irradiators, the operating time of closed irradiators used in the presence of people is not limited. Bactericidal recirculators with irradiator lamps installed in them can safely operate for 8 hours a day. However, in practice, irradiators are turned on during the disinfection of surfaces and objects or immediately after it to achieve the maximum disinfection effect for the duration of exposure.
Our dictionary
Volumetric bactericidal dose is the volumetric density of bactericidal radiation energy (the ratio of the energy of bactericidal radiation to the air volume of the irradiated environment).
For children's rooms game rooms, school classrooms, household premises of public buildings with large crowds of people during a long stay, the value of the volumetric bactericidal dose, ensuring the achievement of disinfection efficiency of up to 90, 95, 99.9% when irradiating microorganisms with radiation with a wavelength of 254 nm from a low-pressure mercury lamp, is 130 J/m 3 .
For indoors educational organizations indicator of microbial contamination in the air, i.e. the total content of microorganisms in 1 m 3 of air, is not regulated. However, it is normalized value b Acticidal (antimicrobial) effectiveness , reflecting the level of reduction in microbial contamination of the air or on the surface as a result of exposure ultraviolet radiation, expressed as a percentage as the ratio of the number of dead microorganisms to their initial number before irradiation. For educational organizations, the bactericidal efficiency value should be at least 90%.
In conclusion, let us once again draw attention to the fact that the use of closed-type bactericidal irradiators in kindergartens and schools significantly reduces the risk of ARVI and other infections among adults and children, which is especially important during periods of epidemic surges. However, bactericidal effectiveness without compromising the safety of children and teaching staff can only be achieved with strict adherence to the rules for operating bactericidal installations.
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