| 摘要 |
PROBLEM TO BE SOLVED: To perform proper superheat control over a refrigeration device where a refrigerant tends to be supercooled right before an evaporator.SOLUTION: An indoor expansion valve 41 of a refrigeration device 10 controls expansion of refrigerant that inflows into an indoor heat exchanger 42 based on a low-pressure target value and a target value of superheat degree on the outflow side of the indoor heat exchanger 42 when cooling is effected. A supercooled state of the refrigerant on the inflow side of the indoor heat exchanger 42 is detected by an indoor liquid pipe temperature sensor 44 and an inlet pressure sensor 33. When the refrigerant on the inflow side of the indoor heat exchanger 42 is determined as in a supercooled state based on the detection results of the indoor liquid pipe temperature sensor 44 and the inlet pressure sensor 33, an indoor control device 47 changes settings for raising a superheat target value from a first superheat target value Tsh1 to a second superheat target value Tsh2. |
