Research On The Effects Of Indoor Environmental Factors And Their Interaction On Occupants’ Environmental Perception

In the buildings where people spend most time,the indoor environment quality directly affects occupants’ physical and mental health.The four main factors affecting indoor environmental quality are thermal environment,acoustic environment,illumination environment and indoor air quality.Previous studies have analyzed the influence of single environmental factor on occupants’ environmental perceptions in detail,but environmental perceptions are affected by multiple environmental factors.At present,no studies have explored the interaction between illumination environment and indoor air quality.At the same time,the influence of illumination on thermophysiological response led to changes in subjective perception.Few existing studies have analyzed the interaction in combination with physiological parameters.Therefore,it is necessary to further explore the mechanism of occupants’ environmental perception under the combined effect of illumination environment and indoor air quality.On the basis of experimental research,this paper discussed occupants’ environmental perceptions under different indoor environment.Collect psychological,physiological responses and sick building syndrome(SBS)symptoms to indoor environmental quality by a combination of subjective questionnaires and physiological parameter measurements.16 young subjects were exposed to 12 different conditions.Environmental variables included indoor air temperature(18℃,22℃and 28℃),illumination color temperature(3000K and 6000K)and indoor air quality(introduce or not introduce air pollution source).This paper analyzed the relationship between environmental factors and subjective perceptions,physiological parameters and health symptoms,and determined the direction and scope of influence.At the same time,the internal correlations between subjective perceptions and physiological parameters were analyzed.The main conclusions of this paper are as follows:In cold,neutral and hot indoor environments,the influence direction of color temperature and indoor air quality on subjective perceptions were different.In cold and neutral environments,cool light decreased the thermal sensation vote and increased the perceived air quality.In hot environment,the subjective thermal perception votes showed an opposite trend,and cool light made the air quality evaluation more negative.Color temperature and indoor air quality had no visible influence on eardrum temperature,blood pressure and blood oxygen saturation,but had a greater impact on pulse rate,skin temperature and heart rate variability.The proportion of SBS symptoms increased significantly with the increase of air temperature.Warm light and poor air quality significantly increased the proportion of SBS symptoms.Combined with subjects’ subjective perceptions and physiological parameters,the correlations were studied.Under the comprehensive effect of color temperature and indoor air quality,thermal perceptions were significantly correlated with indoor air quality perceptions,and physiological parameters about temperature were strongly correlated with each other.All SBS symptoms were positively correlated.The correlations between subjective environmental perceptions and physiological parameters were as follows: thermal sensation > perceived air quality > perceived color temperature.SBS symptoms were more closely related to subjective perceptions than physiological parameters.By studying occupants’ environment perceptions under different indoor environmental factors,this study systematically discussed the differences and internal correlations between occupant’s subjective environmental perceptions and objective physiological parameters under different indoor environmental factors,which provided a reference for the study of occupants’ environmental perceptions under multiple environmental factors.