| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration device enabling suppression of cost and detection of leakage of a refrigerant or shortage of filled refrigerant amount.SOLUTION: An air conditioning system 100 includes a supercooling heat exchanger 16, a second outdoor expansion valve 15, a first refrigerant flow rate calculation section, a second refrigerant flow rate calculation section, and a refrigerant amount determination section. The supercooling heat exchanger 16 includes: a first flow passage 161 disposed on a refrigerant main circuit RC1; and a second flow passage 162 disposed on a bypass circuit RC2. The second outdoor expansion valve 15 is disposed upstream of the supercooling heat exchanger 16 in the bypass circuit RC2. The first refrigerant flow rate calculation section calculates a refrigerant flow rate flowing in the bypass circuit RC2 as a first refrigerant flow rate on the basis of a refrigeration cycle theory, and the second refrigerant flow rate calculation section calculates the refrigerant flow rate as a second refrigerant flow rate on the basis of a fluid theory. Based on a comparison result between the first refrigerant flow rate and the second refrigerant flow rate, the refrigerant amount determination section determines leakage of the refrigerant or shortage of filled refrigerant amount.SELECTED DRAWING: Figure 1 |
