Tests on performances of heat pump unit with continual heating technique

Presents three conventional continual heating methods, including electricity heating, radiation and thermal storage types. Applies the method of thermal storage type to a commercial air conditioner with capacity of 16 kW, and performs a test. The result shows that the heating capacity is improved markedly by applying the thermal storage method, and the heating capacity is improved by 8% to 15% on low temperature condition. The frosting process is inhibited, and the frost amount is reduced. Meanwhile the defrosting time is shortened by 1 to 3 min. The air supply temperature of the indoor unit is improved by 3 to 5 ℃ compared to that of conventional air conditioners.