| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner capable of restraining a pressure increase inside of compressors, even if the compressors are continuously driven at a predetermined rotating speed, when starting the air conditioner.SOLUTION: This air conditioner 1 has first starting control and second starting control as starting control. In the first starting control, hot gas bypass pipes 36a and 36b and oil return pipes 37a and 37b are put in a state of making a refrigerant flow. Thus, even if the compressors 21a and 21b are continuously driven at the predetermined rotating speed, an increase in delivery pressure can be restrained, and the pressure increase inside of the compressors 21a and 21b can be restrained. After finishing the first starting control, since a state of the hot gas bypass pipes 36a and 36b and the oil return pipes 37a and 37b can be maintained for a predetermined time, an increase in the compression ratio in the compressors 21a and 21b is restrained, and damage of the compressors 21a and 21b caused by the increase can be prevented. |
