| 摘要 |
PURPOSE:To let controlled voltage approach smoothly voltage for a target frequency even in variable control mode in which the values of voltage/ frequency can be varied in conformity to load in a refrigerating plant which is provided with a refrigerant circuit and a controller having an inverter section. CONSTITUTION:In a refrigerating apparatus 1 which is provided with a refrigerant circuit 31 and a controller 18 having an inverter section 10, the controller 1 is provided with a control means 14 which delays variable speed of a frequency compared with constant control mode which fixes the afore-said values in variable control mode which makes variable the values of voltage/frequency in conformity with load. This construction makes it possible to control the voltage excessively for the delay of the variable speed of the frequency and allow the controlled voltage to approach the voltage of the target frequency smoothly. |
