基于全链条风险评估的R290家用空调安全等级量化研究OA

R290,as an A3 classified flammable refrigerant,faces risks of leakage and combustion during its promotion in household air conditioners.To systematically evaluate the full-chain risk levels of different products,a risk assessment quantification method was adopted to quantitatively grade five types of products:split-type,portable,window-type,saddle-type,and indirect cooling unit.The results indicate that indirect cooling units(2.00)and saddle-type units(2.65)are classified as low-risk;window-type air conditioners(5.61)and portable air conditioners(6.36)are classified as medium-risk;split-type air conditioners(7.56)are classified as high-risk.Sensitivity analysis of refrigerant charge shows that split-type air conditioners are the most sensitive to changes in refrigerant charge,with an increase of 57%;portable and window-type air conditioners follow,with increases of 38%and 45%,respectively;saddle-type units and indirect cooling units,due to their refrigerant circuits being entirely placed outdoors,show no variation in indoor combustion risk with changes in refrigerant charge.This provides a reference for the full-chain risk prevention and control and safe promotion of R290 household air conditioners.