Interpretation of the safety standard of air conditioner IEC 60335-2-40:2022 the special requirements for appliances using flammable refrigerants——charge limits, requirements for ventilation and secondary circuits

WU Xiaoli, REN Fei

Journal of Appliance Science & Technology . 2022, (6): 24 -31 . DOI: 10.19784/j.cnki.issn1672-0172.2022.06.002