居室通风换气与儿童呼吸道健康效应的调查研究

THE STUDY OF HEALTH EFFECT OF DWELLING-HOUSE VENTILATION ON CHILDREN'S RESPIRATORY SYMPTOMS

本文对安徽南方农村两个自然村417户居室进行通风换气与儿童呼吸道健康效应的研究.调查结果,85%居室的每小时空气交换次数(ACH)介于0.5～1.0之间;居室通风换气与儿童呼吸道症状率呈负相关关系;居室 ACH<0.5组的每100人周症状率(3.52/100pw)高于居室 ACH0.5～1.0组(1.75/100pw).

The relationship between the natural ventilation and the level of the air pollutant was investigatated in 15 rural dwelling-houses.The average volume of there dwel- ling-houses was 55.26 m.The furniture coefficient was 2.06m.When the door was clossed the air changes per hour(ACH)were 1.11.The required ventilation volume for one to eliminatc CO_2,is 6～9L/s.Mean that HCHO concentration indoor was 4.39μg/m,slightly higher than outdoor.With the door and window sclossed ^(222)Rn concentration was 2.7 times as high as that when the door was opened.The average wind volocity indoor was less than 0.05m/s during the winter.The average ventilation efficiency was less than 1.The results of the study suggest that clossing the door and windows may lead up to the decrease of air changes which results in a rising of the accumulation of indoor pollutants.