The refrigerant generating bubble pump, in which the generation of refrigerant vapor and the pumping of solution both take place, is used to transport refrigerant, absorbent and diffusion gas in a diffusion absorption heat transformer. In this paper, experiments of refrigerant generating bubble pump were performed with H₂O (water) as refrigerant, HCOOK (potassium formate) as absorbent and air as diffusion gas. The influences of motive head, inner diameter of lifting tube, generating temperature and diffusion gas flow rate on the refrigerant generating and solution pumping performance were investigated. Increasing motive head or inner diameter of lifting tube led to the decrease of solution flow rate and pumping ratio. While the diffusion gas flow rate increased, the solution flow rate and pumping ratio decreased, and the refrigerant flow rate increased under most conditions. It was observed that the refrigerant flow rate was the largest when the inner diameter was 9 mm and the generating temperature was 95 °C. These results will facilitate the design and development of diffusion absorption heat transformers in the future.

产生制冷剂蒸气和泵送溶液的制冷剂产生气泡泵用于在扩散吸收式热转换器中输送制冷剂，吸收剂和扩散气体。本文用H ₂进行了制冷剂产生气泡泵的实验。O（水）为制冷剂，HCOOK（甲酸钾）为吸收剂，空气为扩散气体。研究了动力头，提升管内径，产生温度和扩散气体流速对制冷剂产生和溶液泵送性能的影响。动力头或提升管内径的增加导致溶液流速和泵送比的降低。在大多数情况下，当扩散气体流量增加时，溶液流量和泵送率降低，制冷剂流量增加。观察到，当内径为9mm且产生温度为95℃时，制冷剂流量最大。这些结果将有助于将来扩散吸收式热转换器的设计和开发。