Experimental study on the effect of the split-type air-conditioner on the transmission of smoking pollutants in a room

Figures & data

Figure 1. Floor plan of the room.

Table 1. Instruments used for measurement.

Device	Parameters	Accuracy
Testo175-H1	T	±0.4°C
	RH	±2%RH (2%-98%RH)
RAE PGM-7320	TVOC	±3% (10–2000ppm)
CEM DT-9850 M	PM2.5	1 μg/m Li et al. 2020

Table 2. Cases of a comparison study.

Case	Cigarette burning way	Air-conditioner
1	Smoldering	Off
2	Smoking	Off
3	Smoldering	On
4	Smoking	On

Table 3. Temperature and relative humidity results.

Parameters	Case	Max	Min	AVE	SD
T (°C)	1	29.9	29.2	29.8	0.15
	2	30.5	29.8	30.3	0.18
	3	26.8	26.3	26.5	0.11
	4	27.3	26.1	27.0	0.34
RH (%)	1	72.8	67.2	71.1	1.29
	2	71.8	63.5	67.7	1.94
	3	48.8	43.1	45.9	1.29
	4	44.8	39.0	41.5	1.40

Figure 2. Variation of indoor pollution concentrations with air-conditioner off. Case 1 is smoldering with the air-conditioner off, case 2 is smoking with the air-conditioner off, case 3 is smoldering with the air-conditioner on, and case 4 is smoking with the air-conditioner on.

Figure 3. Effect of air-conditioner on indoor air pollutant concentrations. Case 1 is smoldering with the air-conditioner off, case 2 is smoking with the air-conditioner off, case 3 is smoldering with the air-conditioner on, and case 4 is smoking with the air-conditioner on.

Figure 4. Nicotine concentration of the condensate samples. The samples 3-A, 3-B, 4-A and 4-B are condensate from the air conditioner in case 3(smoldering with air-conditioner on) and case 4(smoking with air-conditioner on) at the end of cigarette burning and 15 minutes later, respectively.

Li, J., H. Xu, B. Yao, Li, W., Fang, H., Xu, D., and Zhang, Z. 2020. Environmental tobacco smoke and cancer risk, a prospective cohort study in a Chinese population. Environ. Res 191:110015. doi:10.1016/j.envres.2020.110015.

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Data availability statement

The authors confirm that the data supporting the findings of this study are available within the article.