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Lu net January 5th, many parents WeChat and micro-blog have forwarded a message that "primary and secondary schools and kindergartens can use the winter vacation time to install the new wind system that can remove PM2.5 and replace the core periodically." The reporter learned that at present, there are only air purifiers in the classrooms of individual schools in Ji'nan. Most of them are equipped by the class committee, and the love enterprises are invested for the installation of the school.
an air purifier in the classroom to eliminate haze effect, a school in Ji'nan conducted an experiment on this.
configuration status:
half of the class is equipped with air purifier
with the increase of fog and haze, a post on calling for a new wind system in the classroom is frantically forwarded in a circle of friends. It suggested that schools and kindergartens could install fresh air systems except PM2.5 and replace filters regularly.
how much is the new air system or air purifier in the classroom now? Reporters survey many schools in Ji'nan that there are few schools equipped with air purifiers. In Hongjia Lou third primary school, donated by the loving enterprise, 40 classes in the whole school were installed with air purifiers in each class. Most of the other schools are funded by various classes of family committees. For example, there are 51 classes in a school in the East, and in half of the classrooms, there are 30 classes of air purifiers and two classes with air purifiers. "There are air purifiers in the classroom, which are purchased by the family council, and parents take the air purifiers home to schools for students." A teacher told reporters that the school is not equipped with uniform, from the purchase to later maintenance are the parents of the home committee to organize their own activities.
in most of the nearly ten schools surveyed, most school classrooms are equipped with air purifiers, and only two classrooms in one school have a new wind system installed. "A factory randomly selected two classrooms for free installation of the fresh air system. The new wind system runs across the ceiling of the classroom, erect a lot of thick pipes like heat pipes, and on the wall of the classroom there is a screen like a central air conditioner on the screen. The school teacher said that the new wind system is different from the air purifier equipped with the family Committee. The air purifier can be carried at any time, and the installation and disassembly of the new air system are a big project.
cost calculation: the air purifier used in a classroom of
about 4000 yuan
a reporter found that the air purifier equipped by the family committee is not uniform in quantity, style, brand and price, all of which are discussed and settled by the family Committee of various classes. How much is the cost of the air purifier used in the classroom?
about 60 square meters in a classroom. The cost of an air purifier for this area is about 4000 yuan. This is not a regular replacement of filter nets, maintenance costs, and electricity charges are not included in it. An air purifier company told reporters that if the joint venture or imported brand of air purifier prices will be even higher.
the initial installation of the fresh air system is higher than the purchase of an air purifier. The reporter learned that in the family with an area of 120 square meters, the installation of a new set of new wind system is about 30 thousand yuan (home will be distributed according to the pattern of each room, so the price should be carefully calculated, the price of the brand is different, the 30 thousand yuan is only a rough estimate), and the cost per square meter is about 250 yuan. According to this estimate, a new 60 square meter classroom equipped with a fresh air system costs about 15 thousand yuan.
according to the introduction, the so-called new wind system is a set of independent air treatment system composed of air supply system and exhaust system. It is divided into two types, pipe type and pipe free. The working principle is to use high air pressure, large flow fan on one side of the closed chamber, the air supply by one side in one side by mechanical strength, and the way out of the other side with a specially designed exhaust fan to the outside, forcing the new wind field to be formed in the system. At the same time, the air is filtered, poisoned, sterilized, oxygenated and preheated during the air supply (winter).
school worries: whether
installation of air purifier can play its due effect
"equipped with air purifier or installation of new wind system, it costs not a small number, our school also wants to install it for students, but no official data shows that air purifier and new wind system are taught." What is the effect of the haze in the room? " A primary school principal, who did not want to be named, said that if the school spent the money, installed the air purifier or the new wind system, in addition to the bad effect of the haze, not only did the students get the benefits, but the parents would also have some opinions about it. Now all kinds of brand air purifier are dazzling, and it has been reported that the quality problem of the air purifier itself will bring two pollution. How do the two pollution do harm to the student's body?
many schools have put forward the effect of air purifier and new wind system in the classroom. What is the problem? "Is the classroom door closed for every student to come in and out of the class, can the air purifier have the effect in this case?" a class teacher said that although the class committee was equipped with air purifier, it was not clear what the effect of the haze was, but only to see the light on the air cleaner from the air. The bad red turned blue, but the air quality index in the classroom was never detected by professionals. At the same time, the air purifier has a large electric power, and many schools are old and old. If all the classrooms run the air purifier at the same time, they do not know whether the power load will bear. These details require the school to compare and verify the data before the installation of the school.
a lot of difficult problems
not only have to consider the use rate but also have to ask parents' opinion
is the air purifier really a deity against PM2.5? On 4, it happened that a manufacturer of free air purifier for the school was carrying instruments to the classroom for testing. The air quality index, which was tested outside the classroom, was 330. At this time, the air quality index was 220 in the classroom of the air purifier, and the students came into the classroom between classes. At this time, the air quality index was 250-260 in the classroom of the air purifier.
air purifier is not easy to become a standard for primary and secondary schools and kindergartens. The reporter looked up the standard of basic primary and middle school running conditions (trial run) of Shandong Province in 2008, which did not make a hard rule for the indoor air condition in primary and middle schools, and equipped with air purifier or installation of new wind system needed corresponding supporting funds. "Nowadays, the funds of schools are all earmarked for special purposes, and the budgets for the next year should be reported to the higher authorities one year ahead of schedule. At the same time, schools need to go through the corresponding procurement procedures if they buy and install air purifiers or fresh air systems. An industry source said that if schools install air purifiers or fresh air systems, they should also consider the utilization rate and fully solicit parental advice. After all, classrooms equipped with air purifier and fresh air system can not fundamentally solve the impact of haze on children. (source: Ji'nan times)