Research On The Influence And Control Of Dry And Wet Zone Of Bathroom On Indoor Wet Environment

The average relative humidity of Guangzhou in the hot summer and warm winter area is about 70%.The relative humidity in the winter and spring alternating seasons and the “back to the south” period is more than 95% for a long time.The wet environment of the bathroom largely determines the indoor air quality and the quality of life of the residents.The hot shower will cause a lot of moisture in the bathroom in a short time,resulting in poor wet environment in the bathroom and rest area,and relatively high relative humidity.The outdoor air in “hui nan tian” severely reduces indoor air quality.This paper conducts a questionnaire survey and experimental monitoring on the impact of a large amount of moisture generated by a university in Guangzhou and nearby communities during the hot shower in winter and winter and spring seasons on the wet environment of the bathroom and rest area.The results showed that during the bathroom shower that had not been subjected to the wet and dry partition and 80 minutes after the shower,the toilet window and the rest area near the toilet should be closed as much as possible to reduce the amount of moisture invading the rest area.If the rest area doors and windows near the bathroom form a convection during this period,the doors and windows should also be opened as little as possible while satisfying comfort.Based on the design height of dry and wet partition partition manufacturers commonly used on the market,the influence of partition height H on the wet environment of the bathroom dry area and the nearby rest area during the shower is studied.The results show that compared with the other three groups of experiments,the partition plate is 0.05 m away from the ceiling.The experimental group has better control effect on the infiltration range and infiltration degree of the high-humidity gas and “pollution gas” in the wet area to the dry area and the rest area;When there are two convection louvers on the same wall,they should not be opened at the same time to reduce the convective ventilation area,so as to avoid the formation of negative pressure at the louver vents of the bathroom door,and the high humidity gas in the bathroom will flow into the rest area.Under the passive control of the partition partition,opening the wet area by about 1/2 can open the window area(Sopen≤12S),which is beneficial to improve the wet environment of the bathroom and the rest area,and directing the outdoor fresh air into the wet area of the bathroom can improve the discharge and liquefaction effect of the high-humidity gas enriched in the wet area during the shower,and basically does not adversely affect the dry area and the rest area of the bathroom.CFD numerical simulation analysis method was used to study the comfort indicators such as the temperature and humidity environment and airflow velocity of the showerheads in the head and face and wet areas under different partition heights,and the changes of the wet environment in the bathroom dry area,and based on the effective questionnaire data.On the basis of the comprehensive evaluation index Eh,the height setting of the partitions under different weight coefficients is evaluated and corresponding guidance recommendations are obtained.The height H of the partition plate is from 1.85 m to 2.15 m.As the height increases,the relative humidity value φ,the air flow velocity value v and the temperature value t of the head surface of the shower appear to increase in a vertical gradient,that is,the height of the partition plate.The higher the temperature,the wet field and the airflow field felt around the head and face of the same showerer.When the weight coefficient w1:w2 is 0.4:0.6,when the partition height H is 2.15 m,the male comprehensive evaluation index Eh 男 and female comprehensive evaluation index Eh 女 is the smallest.At this time,the male households in Guangzhou choose the bathroom wet and dry partition height.H interval is better at 2.05-2.15 m,female households prefer 1.95-2.05m;when w1:w2 is 0.5:0.5,Eh 男 is the smallest when H is 2.05 m,H reference interval is 1.95-2.15m;H is At 1.95 m,Eh 女 is the least.Under this scheme,female households choose 1.95 m or so.When w1:w2 is 0.6:0.4,when E is 1.95 m,Eh 男 is the least.In Guangzhou,male households choose H reference interval of 1.95-2.05.m;Eh 女 is the least when H is 1.85 m,and the female households choose 1.85-1.95 m under this weight coefficient.