Patent ID: 8109105
Filing Date: 2012-02-07
Classification: F25B

Abstract:
1. A refrigerating air conditioning system comprising: a refrigeration cycle configured to circulate refrigerant through a compressor, a user side heat exchanger, a user side decompression device, a heat source side decompression device and a heat source side heat exchanger and operated with a high-pressure value being a pressure higher than a critical pressure of the refrigerant and a low-pressure value being a pressure lower than the critical pressure; a refrigerant amount adjusting circuit including, when a high-pressure value of the refrigeration cycle is smaller than a high-pressure target value or an exit refrigerant temperature of the user side heat exchanger is larger than an exit refrigerant target temperature, cutting off the high-pressure low-temperature refrigerant connecting pipe and connecting the high-pressure high-temperature refrigerant connecting pipe or the low-pressure low-temperature refrigerant connecting pipe, so that a small-density refrigerant is stored in the refrigerant storage container, and when the high-pressure value of the refrigeration cycle is larger than the high-pressure target value or the exit refrigerant temperature of the user side heat exchanger is smaller than the exit refrigerant target temperature, connecting the high-pressure low-temperature refrigerant connecting pipe or the high-pressure high-temperature connecting pipe and cutting off the low-pressure low-temperature refrigerant connecting pipe, so that a large-density refrigerant is stored in the refrigerant storage container; and