In order to develop the multi-heat pump system for two zones with different capacity, it was designed the optimum refrigerant control circuit using capillary tubes. The system characteristics of multi-heat pump was investigated using the multi-calorim...
In order to develop the multi-heat pump system for two zones with different capacity, it was designed the optimum refrigerant control circuit using capillary tubes. The system characteristics of multi-heat pump was investigated using the multi-calorimeter with a high performance. In this study, the reliability of the multi-heat pump system was tested. The results of the rating test showed that the capacity of the multi-system with the capillary tube control circuit, which was more simpler than an electronic expansion valve, was satisfied about 93% of the design reference value. And it was obtained the rating refrigerant, the compressor capacity and the accumulator capacity for the multi-heat pump. The reliability for the multi-type heat pump was verified, based on the JIS standard.