Analysis And Research On Indoor Air Environment And The Pollution Problem

The indoor air quality definition experienced many varieties in thismore than 20 years .Firstly people equipollence the indoor air qualitythat is the price as a series of pollutant density almost and completely.In recent years, the people know that this kind of pure objectivedefinition has already can't cover the IAQ contents completely. Hence,the people carried on to the definition of indoor air quality to developcontinuously. In 1989 years originally P.ofanger professor of theCopenhagen university in Denmark put forward: The quality reflectedthe degree of contented people request, if the people are satisfied to air,is a high quality;whereas, is a low quality.The indoor air quality problem can't mix to be the same to the indoorpollution is the problem that the people usually take place themisconstruction easily. " Indoor air quality" usually does not mean"indoor pollution" that the hygiene epidemic prevention or preventionmedical science sections involve, But especially point the indoorlong-term low density pollution of widespread existence, its density islow or slightly high in nation relevant standard. The harmful thing existeverywhere strictly, these long-term low density pollutions can't becalled the "pollution", but" quality" that should be called the air. There isno super object pollutant be unequal to the air quality is good.The evaluation of the indoor air quality is a kind of method ofscience that the people know the indoor environment, it is new conceptthat deepens but puts forward to the indoor environment importanceunderstanding continuously along with the people. Because the indoorair quality involves the knowledge of many courses, its evaluationconcentration building technique, the building equipments, medicalscience, environment monitor, hygiene, social psychology etc. manycourse of to complete. At present, the indoor air quality evaluates themeans that the general adoption quantity turns the monitor to combinewith the subjective inquisition to carry on. The quantity in which turn themonitor mean to measure the indoor pollutant density visitor viewunderstanding and evaluate the indoor air quality directly. But thesubjective evaluation mean to make use of the person to sensoryapparatus to carry on the description with adjudicate the work.The pollutant evaluates the index sign;its density size means thelevel of this pollutant. Such as the in common use C02 representative ofsend forth the thing;the formaldehyde representative's volatility organicmatter;the microorganism density representative's metabolism thing(smell, allergic factor) level etcAlong with the technical development of calculator, the method thatmakes use of to compute the fluid mechanics to carry on the numberemulation to the indoor air current emerge with the tide of the times. Thenumber emulation method has the period short, the expenses low etc.characteristics, and can carry on in advance, so got the substantialdevelopment in recent years.The inquisition result of the indoor air quality problem show thatthe reason that causes the indoor air quality problem can is divided intotwo types:Ⅰ , Air condition (HVAC) system design or circulate notappropriate;Ⅱ, Pollutant function of each kind of pollution source creation,both not complete independenceIn air condition system design, relate to with the indoor air qualityvery close of in addition to fresh air and pollutants, the current of airorganize of design to more importance. The current of air organizationdesign good, the pollutant is ejected while not only canning press freshair qualifying pressing quantity to send to the work area, but also beingwithin the reach of, raising the indoor air quality consumedly.Raise the indoor air quality wants to control to pollute the source,prevent indoor pollutant creation and the outdoors pollutants from enteris a root that improves the IAQ, but then improve the design of thesystem of HVAC and circulate assurance of raise the IAQ, is improvethe indoor air quality of important pointTo research the relation of the comfort, the health and environment,the body temperature that has the necessity understanding human bodyregulates the mechanism, hot not comfortable and hot comfortable andoutput physiology process. The hot comfort is the pleased feeling thatbe is causing mentally by the person's a series of activity of the nervoussystem, the temperature variety is an important reason that affects thehot comfort. Hot comfortable creation is the nervous system is changedinto the loose process by the strain at cause mentally of feeling, is notcomfortable just have the comfort, comfort and not comfortable isrelative, have no absolute comfort.How to build up a comfortable work environment under thecondition of low temperature high and wet? It is the problem that thefood industry profession wants to face to have the widespread meaning.We preferably resolve this problem in Jilin Deda Meat process limitedcompany exit product workshop of design. Main research contents:1. How carry out low temperature air condition environments 16±2℃ .2. How do build up a work environment of comfort under lowtemperature air condition environments of the 16±2℃2.1 The choice of the air condition system2.2 To the fresh air, send and return air to the design of the system2.3 The assurance of the indoor air current velocity2.4 Reduce the influence of an indoor temperature of the sun radiation2.5 Wind velocity and noise2.6 Heat obstruct of the smock of the dissimilarity season2.7 The indoor temperature motion varietyThe indoor air current velocity is been small under the condition oflow temperature high and wet in 0.09 ms/ s can be the food processingindustry low temperature air condition reference value of the indoor aircurrent velocity, having the widespread leading meaning.Pollutes to carry on the detailed analysis to the air condition systemtwo times, put forward fit air condition's can create the health,comfortable environment. But not fit air condition at objective up providethe possibility that germs breed, increment the opportunity that germsinfection, and then give air condition in output germs dissemination easyfeeling crowd, enlarged several rate that people through the air pathbecome sick. It is not fit that the unilateral comprehension filters inaddition to the germ, over-emphasizing the clean and technical functionof air also .Not fit air condition all would surface in the air condition boxand pipe, cool off the wet dish tube, congealed dish of water and drainthe water to seal, add the wet machine and it saves the container ofwater and affects by damp and cold the air filter surface etc. the placehelp realize with the result that the germ stores and breeds continuously.Guarantee the meaning of the system to speak to control the germs tobreed to compare the filter to drop the germs up from the establishmentmore important. Depend the method that the increment air filter onlydifficult suffer from in the hidden trouble that the cancellation germsendanger, can't satisfy the request that the food processing factoryguarantees the system. The biggest germs occurrence source in the aircondition system is the air condition machine set, so prevent from theair condition machine set polluting two times is a problem-solvingimportant point.