| 摘要 |
PROBLEM TO BE SOLVED: To demonstrate the maximum capacity of a refrigeration unit by fully demonstrating the capacity of a heat exchanger which functions as an evaporator. SOLUTION: The expansion means of refrigerant at a refrigerant circuit (20) comprises user side solenoid valves (64a and 64b) opened and closed by a controller (70). User side circuits (40a and 40b) are provided with first temperature sensors (Th-A1 and Th-A2) and second temperature sensors (Th-B1 and Th-B2). The first temperature sensors (Th-A1 and Th-A2) detect the refrigerant evaporation temperature at refrigeration evaporators (41a and 41b). The second temperature sensors (Th-B1 and Th-B2) detect the temperature of the terminator part of the user side circuits (40a and 40b). The controller (70) opens and closes the user side solenoid valves (64a and 64b) based on the detected temperature of the first temperature sensors (Th-A1 and Th-A2) and the second temperature sensors (Th-B1 and Th-B2). In this case, the controller (70) opens and closes the user side solenoid valves (64a and 64b) to keep the refrigerant to be saturated vapor at the outlet of the refrigeration evaporators (41a and 41b).
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